Abstract: Embodiments relate generally to milling machines and milling techniques, and more particularly, to devices, integrated circuits, computer readable media, apparatuses, milling machines and methods to automatically load and/or unload work pieces in relation to the adverse milling machine environments. In one embodiment, an apparatus includes a loader member configured to impart a loading force unto a work piece to position the work piece in a milling region. The apparatus can also include an effector configured to transfer the loading force from the loader member to the work piece and is configured further to apply a cleaning force to a path that the work piece traverses to the milling region. In some cases, the apparatus can include an ejector configured to remove a milled work piece from the milling region.

Abstract: A machine tool is provided. The machine tool can comprise a machine frame, at least one tool holder device which is held for movement on the machine frame, a work space in which workpieces are machinable, a work space cladding, at least one workpiece carriage which is displaceable on a path guiding device relative to the machine frame, the path guiding device being arranged alongside the work space, and at least one sliding door for access to the work space. The sliding door particularly can be arranged on the path guiding device of the at least one workpiece carriage.

Abstract: An electric router includes a housing, a base, a motor having an output shaft, a first switch for the motor, a locking member having a first end and a second end, a second switch connected in series with the first switch, and a connecting rod having a first end positioned proximate to the base and a second end positioned remotely from the base. The first end of the connecting rod is connected with the second end of the locking member, the second end of the connecting rod is connected with the second switch, and the second end of the connecting rod selectively keeps the second switch in one of a switch-off position when the first end of the locking member engages with the output shaft and a switch-on position when the first end of the locking member disengages from the output shaft.

Abstract: The present invention relates to a machine tool in which a column including a main spindle with a working tool mounted thereon is movable in a direction along an edge part of a machine platen, wherein a protective fence is provided on the edge part of the machine platen.

Abstract: The invention relates to a protection device for a motor spindle (1) arranged in a housing (2), particularly of a machine tool, having an inner ring (6) fixedly joined to the motor spindle (1) and an outer ring joined to the housing (2). The inner ring (6) is arranged in the outer ring (7) in a way permitting axial motion and a tilting motion, and is placed under elastically resilient preload against the outer ring (7) by means of preloading members (8).

Abstract: A machining apparatus has a vertical support frame defining two machining stations spaced apart in a direction, holders in the stations for rotating respective workpieces each about a respective station axis, and a transfer device for loading rough workpieces into the holders and for taking finished workpieces out of the holders. A single machining tool can be shifted in the direction between one position engaging the workpiece in one of the stations and out of engagement with the workpiece in the other of the stations and another position engaging the workpiece in the other station and out of engagement with the workpiece in the one station.

Abstract: The invention relates to a spindle for a machine tool, in particular a motor spindle having a housing (2) for accommodating an electric motor (3) and a shaft (6) which can be driven by the latter, in particular having a tool holder for a tool for machining workpieces, wherein at least one data acquisition element (8) for recording operating and/or state data of the spindle is provided, and wherein the data acquisition element is in the form of a radio chip and can be read by radio using a read element (9).

Abstract: A main body of a machine tool is covered with a cover. A ceiling portion of the cover that is situated over a spindle motor is provided with an opening portion. The cover is provided with hanging portions that hang down from the opening portion with a predetermined clearance from side surfaces of the spindle motor other than the rear surface. Air that is mixed with a misty cutting fluid in a space inside the cover is sucked in through a suction pipe by a mist collector. The outside air flows into the space inside the cover through the clearance. The outside air that passes through the clearance is driven to flow through vents by a built-in cooling fan of the spindle motor, thereby cooling the motor, and is then discharged to the outside. In consequence, the temperature in the space inside the cover can never be increased by heating of the spindle motor.

Abstract: A main spindle device includes: a housing having an air supply passage; a spindle that is inserted into the housing and supported by a bearing so as to be able to rotate relative to the housing; and an air sealing member that is positioned between an outer circumferential surface of the spindle and the housing on a front side with respect to the bearing along a rotation axis of the spindle, has a substantially annular shape, and is detachably fixed to the housing with an inner circumferential surface of the air sealing member facing the outer circumferential surface of the spindle, wherein air supplied from the air supply source through the air supply passage is discharged into a gap between the outer circumferential surface of the spindle and the housing, thereby effecting non-contact air sealing at least between the inner circumferential surface of the air sealing member and the outer circumferential surface of the spindle.

Abstract: A precision machine includes a base having an outer wall, a cutting tool for machining a workpiece mounted on the base, a fixing member detachably located on the outer wall, a first connecting member having a first end and a second end and an imaging system. The first connecting member is capable of maintaining a shape after adjustment thereto by application of an external force, and the first end of the first connecting member is fixed to the fixing member. The imaging system is attached to the second end of the first connecting member such that a position of the imaging system relative to the tool can be adjusted by changing shape of the connecting member.

Abstract: A machine for processing optical work pieces having a work piece spindle for the work piece driving rotationally about a work piece rotation axis. At least one processing unit has a tool that can machine the work piece and an adjusting mechanism causes a relative movement between the work piece spindle and tool to selectively enable loading, unloading and processing of the work piece. The adjusting mechanism has a linear drive unit and a swivel drive unit that are stacked on each other to rotate the swivel drive unit and the work piece spindle about a swivel axis that is perpendicular to the work piece rotation axis, and has the linear drive unit move the work piece spindle along a linear axis that can be perpendicular to one of the swivel axis and the work piece rotation axis and parallel to or aligned with the other axis.

Abstract: A splash guard (25) of a machine tool for preventing chips generated when a workplace is machined by the machine tool or coolant from being scattered includes a rear cover (27) mounted on a rear of a bed (13) of the machine tool installed on the floor surface and defining a partition for a rear side of the machining area, and a front cover (29) defining a partition for a front side and lateral sides of the machining area. The front cover (29) is configured of a lower cover (31) placed on the bed (13) of the machine tool, and an upper cover (33) placed above the lower cover (31). The upper cover (33) has a plurality of legs (35) extending downward from the lower end thereof so that the upper cover (33), when arranged above the lower cover (31), is supported on the floor surface by the plurality of legs (35).

Abstract: An engraving machine includes a base with two side panels extending upward from two sides of the base, and a top board is driven horizontally by a motor in the base. A horizontal frame is movably mounted on two rods connected between the two side panels by a motor. A vertical frame is located on a front side of the horizontal frame and is movable along two rods in vertical direction by another motor. The horizontal frame, the vertical frame and the top board are movable along X, Y and Z directions by three independent motors. A chuck is connected to the vertical frame and secures an engraving tool which is driven by a main motor connected between the two side panels. The object to be engraved is secured on the top board and engraved by the engraving tool in X, Y and Z directions.

Abstract: A tool holder fixing structure is arranged to fix a tool holder for holding a tool attached with a throwaway tip to a tool-holder holding part of a machine tool so that a foreign-matter receiving clearance is provided between the tool holder and the tool-holder holding part. The foreign-matter receiving clearance is defined in a range of +30° to ?30° from a cutting-edge position of the throwaway tip assumed as an original point and in a range of 150° to 210° from the original point, respectively.

Abstract: A minimum five-axis machine tool (11) has first to third linear feed axes orthogonal to each other as well as first and second rotational feed axes orthogonal to each other, wherein a rotational axis line of the first rotational feed axis C is parallel to the first linear feed axis Z. While a tool T and a work W are moved relatively through the second and third linear feed axes X, Y to perform machining of the work W by means of the tool T, the machine tool controls the first rotational feed axis C such that a rotational axis line of the second rotational feed axis A is perpendicular to the direction of relative movement of the perpendicular to the direction of relative movement of the tool T to the work W, and controls a power supplied to a motor for the second rotational feed axis A when a torque around the second rotational feed axis A exceeds a specified threshold.

Abstract: A machine tool has a work space (17) in which a device (15) for accommodating workpieces (16) to be machined is arranged. The machine tool further has a work spindle (18) for machining the workpieces (16) and a slide (34) which carries the work spindle (18) and is traversable in a longitudinal direction relative to the device (15), a respective cover (25), variable in length in the longitudinal direction (x), for the work space (17) being provided on the slide (34) on each of its sides, said cover (25) being connected with its respective first end to the slide (34) and with its respective second end to a side wall (21, 22; 51) of the work space (17). Each cover (25) variable in length has a respective rear wall (26) and a respective top (27), whereby the top (27) is connected to the rear wall (26) in a detachable, push-in, manner. A further flexible cover (31) is arranged in front of the slide (34) to protect the work space (17) at the bottom.

Abstract: The invention relates to an auxiliary device for a portable tool, comprising a receptacle (2) for a motor-operated portable tool (22) having an output shaft (26), and comprising a drive train (9) which has a tool receptacle (8), to be opened and closed by rotation, and which can be connected to the output shaft (26) of the motor-operated portable tool (22) via a coupling device. Provision is made for the auxiliary device (1) for the portable tool to have an anti-rotation locking means (13) acting on the drive train (9).

Abstract: An electric router includes a housing, a base, a motor having an output shaft, a first switch for the motor, a locking member having a first end and a second end, a second switch connected in series with the first switch, and a connecting rod having a first end positioned proximate to the base and a second end positioned remotely from the base. The first end of the connecting rod is connected with the second end of the locking member, the second end of the connecting rod is connected with the second switch, and the second end of the connecting rod selectively keeps the second switch in one of a switch-off position when the first end of the locking member engages with the output shaft and a switch-on position when the first end of the locking member disengages from the output shaft.

Abstract: A method of placing a bottom block includes: placing bottom blocks on a block storage area in which a spindle can hold the bottom blocks; attaching a block-transferring tool to the spindle, the block-transferring tool having a main shaft attachment attached to the spindle and a block holder for holding the bottom block; and holding the bottom blocks by the block holder of the block-transferring tool and placing the held bottom blocks on a predetermined workpiece placing position on an upper surface of a table by relative movement.

Abstract: A shaper guard includes a fixture assembly having a sleeve adapted to be statically fixed on a shaper and a rotating member pivotally connected with the sleeve. A first guard panel has a connecting portion connected with the sleeve. A second guard panel has a connecting portion connected with the rotating member and is pivotable in concert with the rotating member with respect to the sleeve and the first guard panel. The second guard panel is biasable by the workpiece fabricated on the shaper. The shaper guard has a simple structure.

Abstract: A machine tool including a base frame, a workpiece table, a machining unit, and a connection portion is disclosed. The base frame has a machining area. The base frame includes two left and right side frames and a connection frame connecting the two side frames. The workpiece table is arranged on the base frame in the machining area. The machining unit is arranged on an upper portion of the base frame and includes a spindle device. A connection portion connects the machining unit and the base frame in a detachable manner.

Abstract: A tool holder plate (51) is fixed to a shaft end part (413) of a hollow motor shaft (41) of a brushless DC servo motor (1), and a cutting tool is mounted in a tool mounting hole (51a) formed in the tool holder plate (51) and a work is cut-processed by this cutting tool. In order to prevent intrusion of a cutting processing oil containing cutting powder into the inside of the motor from between the shaft end part (411) of the hollow motor shaft (41) and an end plate portion (22) of a motor housing (2), a labyrinth seal (55) including a double circular groove (553, 555) having a fine width extended in the axis direction (1a) is formed between a metal plate (53), the tool holder plate (51), and the shaft end part (411). The other shaft end part (414) is also formed with a labyrinth seal (56) of the same structure.

Abstract: A cutting machine having a workpiece changer possessing a receiving element for the workpieces and/or workpiece palettes, said receiving element pivots about a vertical axis and is linearly shiftable in a plane normal to such axis. A tool spindle moves on two parallel side walls which are divided by a transverse wall or by door which can opened or shut between a front machining area and a rear supply area. The radius of the receiving element extends at least partly into a supply area and the tool spindle is movable over the front machining area. Accordingly a person minding or controlling the functioning cutting machine is not hampered by workpiece changing.

Abstract: Method for reducing milling failure in a machining tool due to coincidence between first vibrations v1 substantially caused by mutually exerted forces between the machining tool and an object being machined, and second vibrations v2 substantially caused by mechanical resonance by or in the machining tool itself and/or one or more subsystems of the machining tool. The method comprising the steps of detecting frequencies of v1 and the frequencies of v2; determining the extent of the coincidence between the frequencies of v1 and the frequencies of v2. If the extent of coincidence between the frequencies of v1 and at least one of any of the frequencies of v2 is within a certain range, the vibration causing said coincidence between the frequencies of v1 and at least one of any of the frequencies of v2 is counteracted.

Abstract: A machine tool shield having a base frame comprising a pair of lengthwise base frame members and a pair of widthwise base frame members. The lengthwise and widthwise base frame members are arranged in the shape of a square or rectangle having four corners. The base frame is positioned upon a waterproof membrane. The machine tool shield further comprises a plurality of corner clip members. Each corner clip member is mounted to one of the lengthwise base frame members and one of the widthwise base frame members wherein the one of the lengthwise base frame members and the one of the widthwise base frame members abut each other to form one of the corners. Each corner clip member has a vertically oriented bore therein. The machine tool shield includes a shroud support frame comprising a plurality of vertically oriented members. Each of the vertically oriented members has an end portion that is disposed in a corresponding one of the vertically oriented bores.

Abstract: To provide a machine tool of which the operation rate can be increased by reducing time for suspending an operation for machining an object to be machined during the object-machining operation using the machine tool. A jig includes at least a first jig (5) disposed in a casing (2) and a second jig (14) by which an object (8) is detachably held. The jigger has attaching/detaching structure (17) for detachably mounting the second jig (14) onto the first jig (5). The second jig (14) is provided with grip parts (32) for gripping the second jig (14) during its movement.

Abstract: A splash guard (25) of a machine tool for preventing chips generated when a workplace is machined by the machine tool or coolant from being scattered includes a rear cover (27) mounted on a rear of a bed (13) of the machine tool installed on the floor surface and defining a partition for a rear side of the machining area, and a front cover (29) defining a partition for a front side and lateral sides of the machining area. The front cover (29) is configured of a lower cover (31) placed on the bed (13) of the machine tool, and an upper cover (33) placed above the lower cover (31). The upper cover (33) has a plurality of legs (35) extending downward from the lower end thereof so that the upper cover (33), when arranged above the lower cover (31), is supported on the floor surface by the plurality of legs (35).

Abstract: The invention relates to a program-controlled milling and drilling machine comprising a machine column, a machining unit comprising a milling head and being movable along at least one coordinate axis at the front of the machine column, a machine bed disposed in front of the machine column, a work carrier movable on the machine bed along another coordinate axis, and a pallet exchanger arranged at the free end portion of the machine bed, having two spaced apart pallet holders and a rotating and lifting mechanism on a joint load-bearing structure. According to the invention, the load-bearing structure of the pallet exchanger is laterally arranged next to the machine bed and has a dimensionally stable and sturdy transverse arm extending across the machine bed and supporting the rotating mechanism, the lifting mechanism in the load-bearing structure laterally arranged next to the machine bed being arranged in a manner so as to protect against dirt by a splashboard.

Abstract: A machine tool for machining a molded part, such as an elastomeric coated valve component includes a rotatable cutting tool having a shape corresponding to the shape of a cavity of the valve component. A method of machining the molded part is also disclosed.

Abstract: A guard for a power-feed drill having a fluid inducer protects an operator from coming in contact with a rotating drive assembly. The drive assembly is enclosed by a cylindrical housing having a slotted opening through which a fluid inducer connection extends. The guard comprises a rotatable tube concentrically disposed within the housing and sleeved over the drive assembly so as to cover the opening presented by the slot. The fluid inducer connection passes through a helical groove in the tube.

Abstract: A machine tool is provided. The machine tool can comprise a machine frame, at least one tool holder device which is held for movement on the machine frame, a work space in which workpieces are machinable, a work space cladding, at least one workpiece carriage which is displaceable on a path guiding device relative to the machine frame, the path guiding device being arranged alongside the work space, and at least one sliding door for access to the work space. The sliding door particularly can be arranged on the path guiding device of the at least one workpiece carriage.

Abstract: An operator station is positioned on the outside of a machine tool on the same side of the machine as the tool magazine and the automatic tool changer, to improve the ergonomics of the machine by keeping the tool loading access as close as possible to the operator. This location also allows easy visual access to the tools in the magazine and in the ready position in the tool changer. An angled “tunnel” window passing across the front of the tool magazine and the Y-axis column allows direct visual observation of the working zone of the machine tool from the operator station. A door on the side of the machine allows access from the operator station to a utilities panel located just inside of the door permitting ready operator access to switches, valves, fill points, filters and gages that are located on the panel.

Abstract: A key cutting machine having a vacuum port connected to the housing and capable of removeably connecting a vacuum tube thereto so that when the vacuum tube is connected to the vacuum port the vacuum tube is capable of collecting key shavings created during a key cutting operation and, when the vacuum tube is disconnected from vacuum port, the vacuum tube can be used to collect key shavings on or surrounding the key cutting machine. Additional improvements or features of a key cutting machine are also described.

Abstract: Disclosed herein is a contamination protection apparatus that includes a concealed linear glandular seal for providing continuous protection along an entire length of a movable table of a precision apparatus such as testing and metrology machines, laser machines, biomedical equipment, and precision fabricating machines. The disclosed glandular seal is formed on an inner structure of the protective apparatus, which includes a plurality of mechanical translation stages positioned in the inner structure and two normally closed linear parts of the glandular seal attached to respective mechanical translation stages. The linear parts interfere with each other and are opened by movement of a mechanical translation stage saddle.

Abstract: A machine tool includes a table slidably supported on a carrier and movable relative to the carrier by a driving device, a telescopic covering device having two or more cover members telescopically slide relative to each other in response to a sliding movement between the table and the carrier. A connecting device includes a tubular member attached to the inner cover member, and a rod attached to the carrier and movable into and out of the tubular member when the inner cover member is moved relative to the carrier for guiding the table to smoothly slide relative to the carrier.

Abstract: A main body of a machine tool is covered with a cover. A ceiling portion of the cover that is situated over a spindle motor is provided with an opening portion. The cover is provided with hanging portions that hang down from the opening portion with a predetermined clearance from side surfaces of the spindle motor other than the rear surface. Air that is mixed with a misty cutting fluid in a space inside the cover is sucked in through a suction pipe by a mist collector. The outside air flows into the space inside the cover through the clearance. The outside air that passes through the clearance is driven to flow through vents by a built-in cooling fan of the spindle motor, thereby cooling the motor, and is then discharged to the outside. In consequence, the temperature in the space inside the cover can never be increased by heating of the spindle motor.

Abstract: In a machine tool arrangement comprising a machine tool component including a mounting structure for a work piece to be machined by a suitable metal cutting tool, a housing enclosing the machine tool component, a horizontal support beam is disposed above the housing and carries handling equipment for supplying work pieces from an adjacent loading area to the machine component for machining and returning the finished work pieces to the storage structure and an intermediate storage structure is disposed near the machine tool component for temporarily storing unfinished work pieces to be machined and finished work pieces after being machined.

Abstract: A machine tool capable of eliminating a laborious attachment/detachment work of a cover member is provided. The machine tool includes a door device 5 having a first door 6 to cover a machining-area opening 3e when machining a workpiece and a second door 7 to cover the machining-area opening 3e when not machining the workpiece and formed to be visible an inside thereof, in which the first door 6 and the second door 7 are arranged in a movable manner between a position-in-use covering the machining-area opening 3e and a position when opened opening the machining-area opening 3e.

Abstract: A working machine includes a blade seat movable relative to a sheet plate, and a safety protective device mounted on the blade seat to cover the blades of the blade seat and including at least one swing member pivotally mounted on the blade seat, and a protective board pivotally connected to the at least one swing member. Thus, when any portion of the protective board is pushed by the sheet plate, the whole protective board is driven to pivot relative to the blade seat so that the protective board is moved upward and downward in a whole manner without deflection.

Abstract: A machining system having a machining envelope, a housing, a hopper, and a seal. The housing defines at least a portion of the machining envelope. The hopper has a top surface defining an opening. The seal is disposed between the housing and the top surface. The hopper is configured to receive particulates when positioned below the machining envelope.

Abstract: A motor module (51) holding a plurality of motors as a unit. The motor module (51) is adapted for mounting to the main body (49) of a reinstatement cutting machine (20). The motor module (51) has a ram motor (134) and a rotate motor 136) fixed therein and connected to respective gear shafts (36) and (52) extending from the main body (49). A cross slide motor (74) and corresponding shaft (70) are fixed to the motor module (51) but allowed to rotate with rotating apparatus in the main body (49).

Abstract: In order to improve a machine tool with a working area, in which workpieces can be positioned and can be machined with at least one tool held by a tool holder, such that the disposal of shavings is optimized, at least one cover is provided which limits the working area in the direction of the tool holder, wherein the at least one cover is provided with at least one opening associated with the tool for the passage of the tool.

Abstract: A numerically controlled machine tool performs machining by rotating a rotational tool attached to a tool holder mounted on a spindle, with keys fitted into key grooves in the tool holder. The numerically controlled machine tool includes predetermined-amount rotating unit for stopping the tool holder at a predetermined rotational position and then rotating the tool holder by a given amount, and a distance sensor which is installed apart from the tool holder and measures a distance to the outer surface of the tool holder. The predetermined-amount rotating unit stops the tool holder at a rotational position at which the key grooves do not face the distance sensor, then rotates the tool holder by the given amount. The distance sensor measures the distance to the tool holder while the tool holder is rotating. The measurement result is compared with a reference distance or distances to discriminate between normal and abnormal rotational run-out of the tool holder.

Abstract: A machine-tool production machine is disclosed, with a workspace that can be viewed by an operator through a window or transparent pane, whereby the window or transparent pane can be used with a projection unit as a head-up display for displaying information for the operator. The device provides the operator with a simple, cost-effective and clear representation of information about the manufacturing and production processes as well as other processes running on the machine.

Abstract: A lathe for machining optical workpieces, in particular spectacle lenses, comprises a fast tool arrangement and a workpiece spindle arrangement. A machine frame is cast monolithically from polymer concrete and on and in which all the functional surfaces, functional spaces and other cutouts are formed to their exact dimensions during the casting process. The machine frame upper part cast in one piece simultaneously covers the fast tool arrangement and the workpiece spindle arrangement and thus the machine bed in the manner of a covering hood. The machine frame is of compact dimensions, has a very rigid oscillation-damping machine bed and, in comparison with the rapidly moving elements of the fast tool arrangement, has a very large mass with a high center of gravity, which prevents the transmission of disruptive oscillations from the fast tool movement to the machine bed and thus to the workpiece spindle arrangement.

Abstract: A machine tool comprising a cabin (5) provided with side walls (1, 2) and doors (3, 4), a slide (6) for the reception of a spindle head in which tools are clamped, and with a concertina (7) serving as a roof cover, the concertina (7), by means of the slide (6), being able to be unfolded, folded up and/or transported parallel to the longitudinal side (14) of the slide (6) and perpendicular to the side walls (1, 2).

Abstract: The present invention provides a machine tool capable of suppressing cost increase of a cover even when a long workpiece is machined. A machining unit 3 by which the spindle 2 is supported to be movable in X-axis, Y-axis, and Z-axis directions relative to the machining table 5; and a shielding mechanism 100 provided in said machining unit 3 to prevent chips and coolant from scattering out of a machining area.

Abstract: Apparatus and method is disclosed for providing a safety system for power equipment comprising a machine having a lower tool, an upper tool, and a safety controller. The lower tool is electrically isolated from the reversible upper tool. A safety controller is coupled to the lower tool. A pair of electrically conductive gloves that are coupled to the safety controller are worn by an operator of the power equipment. Electrically conductive stock is held with the pair of electrically conductive gloves, the safety controller allowing the machine to operate when the electrically conductive stock contacts the lower tool.

Abstract: A machine tool (1, 1?), in particular a drilling and milling machine, comprising a housing (20) having a machine bed (2), together with side walls (3, 4) and doors (5, 6, 7), comprising a fixed, pivotable or rotatable work table (8, 9), and comprising a slide (10), transportable in the y direction, for the reception of a spindle head (11), transportable in the x-z direction, for the reception of tools (12), wherein the front door (5), for the enlargement of the working and loading area (21) in the upward direction, is of transomless configuration, the roof region (13) of the machine (1, 1?) has an automatically operable cover (16), the rear region (22) of the machine (1, 1?) has an integrable automatic pallet changer (14), and the machine (1, 1?) is assigned an automatic tool changer (15).

Abstract: A machine tool capable of reducing the lateral width of the upper part thereof by reducing the lateral width of a bed (1) while machining through the same lateral moving distance of a spindle (10) as before, comprising longitudinal guide rails (2) installed on the bed (1), a slide (3) installed through the guide rails (2) movably in a longitudinal direction, a column (6) movable in vertical direction, wherein first cover plates (25) are fixed at the right and left sides of a vertical moving route for the spindle (10), side cover plates (26) are installed continuously with the outer end edges of the first cover plates (25) so as to be turnable rearward, a second cover plate (32) is installed at the front sides of the first cover plates (25) and the side cover plates (26) integrally with the slide (3) so as to cover the front side of the moving range of the column (6), and a shielded machining space (SK) is formed at the front of the second cover plate (32).