Abstract: The invention relates to a process of butt-welding together sheet metal plates, in particular those having different sheet metal thicknesses, by means of an edge preparation to the extent that the edges of the sheet metal plates are milled in a sheet metal stack (5). For this purpose, the appropriate apparatus has a supporting and clamping means (1, 2, 3, 9, 10).

Abstract: A machine tool generally consisting of a base member; a table mounted on the base member having a workpiece support surface, a plenum and at least one port in the support surface of the table communicating with the plenum; means communicable with the plenum for producing a vacuum therein; a check valve including a body disposable on the table in blocking relation with the port, having a passageway therethrough intercommunicating the plenum and the exterior of the table when the valve body is disposed in blocking relation with the port, and a valve element disposed in the body passageway of the valve body displaceable between a first position under a first condition blocking the body passageway and a second position under a second condition unblocking the body passageway; and a tool operatively engageable with a workpiece positioned on the table overlying the check valve when the valve element of the check valve is in the second position under the second condition.

Abstract: A crankshaft (6) is rotated about its axis (7), and all of its crankpins (28, 29, 30), which each respectively have an eccentricity (e) relative to the axis (7), are simultaneously rotary milled by respective allocated rotary milling cutters (34, 35, 36) of a milling cutter set (12). The individual milling cutters (34, 35, 36) each respectively have an eccentricity (e) corresponding to the eccentricity of the respective crankpin that is allocated to be machined by the respective milling cutter. Furthermore, the milling cutter set (12) is rotated at the same rotational speed, i.e. with a rotational speed ratio of 1:1, relative to the rotating crankshaft, while simultaneously the milling cutter set is moved in the X-direction toward the crank-shaft axis to achieve a feed advance.

Abstract: The invention relates to a machine tool having a gantry that is movable along an X axis and having a vertical spindle supported by the cross-member of the gantry. The cross-member comprises two beams that are spaced apart in the X axis direction and that have facing inside faces. Two carriages are mounted to slide on said facing faces, on opposite sides of a vertically movable cursor-carrier. The tool-carrier spindle is carried by a cursor mounted to slide on the bottom face of the cursor-carrier and movable along the X axis. Movements of the carriages, of the cursor-carrier and of cursor are under numerical control. The tool-carrier spindle can move in the X axis direction without it being necessary to move the gantry.

Abstract: An auger bit for forming bores having a circular cross section in a workpiece is disclosed. The bit has an elongate auger portion, a shank, a lead screw, a chisel blade, a spur blade, and a shearing blade. The elongate auger portion has an elongate shaft with a elongate helical land formed therein defining a flute between adjacent turns on the elongate helical land. The helical land has a lead edge and following portion. The shank is integrally connected to one end of the elongate auger portion and is adapted to engage a drill. The lead screw is integrally connected to the other end of the elongate auger portion and is for engaging the workpiece. The chisel blade extends outwardly from the leading edge of the elongate helical land and is for chipping material from the workpiece. The spur blade extends longitudinally from the elongate helical land in the direction of the lead screw. A cutting edge extends longitudinally from the following portion of the elongate helical land proximate to the leading edge.

Abstract: A metal cutting drill includes a steel drill body, and a carbide insert brazed therein. The drill body includes a front face having a recess formed therein, the recess radially overlapping a longitudinal axis of the drill body. The insert is brazed in the recess and includes a plurality of spaced-apart cutting edges disposed on opposite sides of the axis. The cutting edges radially overlap during a drilling operation. One of the cutting edges projects radially outwardly beyond a side face of the head, and another of the cutting edges terminates radially inwardly of the side face.

Abstract: An extractor comprising (a) a frame being configurable in an extracting position having a front and back orientation; and (b) an extractor assembly mountable to said frame for imparting a backward urging force against a drill bit lodged within said object.

Abstract: The invention relates to a process for the production of a milling tool for cutting machining, preferably of metals. The milling tool includes a holder part (2) for the fixation of the milling tool upon a rotating driving arrangement, and an insert carrying part which around its periphery is equipped with several detachable cutting inserts (23), each cutting insert being fastened in an insert seat, which at least partly is situated in a peripheral, insert-carrying milling tool portio (12). Each insert seat includes a bottom support surface (10) and a side support including at least one side support surface (9), a chip pocket (25) being provided in front of each insert seat in the direction of rotation. The side support of the insert seat at least partly is made by a ball-nose end mill (8). This brings about that the number of insert seats in a milling tool may be substantially increased.

Abstract: An engine block is located and clamped on a pallet and then brought into a boring station where the pallet is located and clamped on a shuttle. The shuttle moves solely along a straight horizontal path to move the engine block into the work station, locate the engine block during a machining operation, and then transfer the block out of the work station. First and second three-axis boring machines at respective opposite sides of the block locate crankshaft and camshaft boring bars for different engine blocks and then simultaneously back bore both the crankshaft and camshaft bores. A computer numerical control (CNC) positions the boring bars and the block and controls other machining parameters for different engine blocks. The CNC causes the shuttle to move to a location horizontally offset from a final machining location so that the boring bar axes are offset horizontally from the bearing bore axes and the boring bars are then inserted into the block.

Abstract: A hybrid tool serves as a form on which constituent materials are applied for bonding or curing into a part in a desired configuration. It also serves as a holder for the bonded or cured materials in the originally applied position during subsequent machining. The hybrid tool is made by fabricating a face sheet of composite material having a facing surface configured to the reverse of a desired shape of one surface of a part to be made on the tool. The actual part will be laid up on the facing surface, cured while on the tool, and even trimmed before release. Base structure of the tool holds the facing surface of the face sheet in the desired shape, and includes ground-engaging pads that define an "A" datum plane. The tool aligns a reference plane of the face sheet parallel to the datum plane. A substantially continuous groove in the face sheet, used for trimming the part, opens in the facing surface.

Abstract: In a machine tool having a main shaft, a thermal change amount between two sampling times is computed on the basis of the movement distance of the main shaft during a period from time 0 to time 1a. After thermal change amounts are computed, a total thermal change amount which results from adding these thermal change amounts is computed. Since the thermal change amount is based on the movement distances (driving states) that are detected at the respective time points and the influence of the thermal change amounts that has been computed previously are added to the computed thermal change amount, it is possible to compute the total thermal change amount corresponding to the driving states at the respective time points.

Abstract: A key cutting machine for cutting keys by code has a vise jaw for securely holding a key with a groove of the key aligned with respect to the vise jaw and with at least one of a tip of the key and a shoulder of the key positioned at a predetermined position with respect to the vise jaw, a key cutter, a position detector for detecting a blank edge of the key held by the vise jaw, a movement system for moving the key cutter and the vise jaw relative to one another to cut the key; and a controller for controlling the movement system to carry out a predetermined sequence of movements according to code information. The code information is referenced with respect to a blank edge of a side of the key to be cut, and the predetermined sequence of movements being referenced to the detected blank edge position. A key is cut with the key held in the vise jaw with a groove of the key aligned with respect to the vise jaw without needing to align the key with respect to a keyrest.

Abstract: A spindle capable of operation at 200,000 revolutions per minute (RPM) with a reciprocating shaft design to minimize the moving mass. The spindle has a ceramic spindle shaft to decrease the moving mass and increase the shaft stiffness for better dynamic stability. The spindle employs a built-in linear motor to provide direct drilling motion to move the shaft along the axis, and a permanent magnet DC brushless motor to rotate the spindle shaft. The linear motor is coupled to the shaft by a combination of an air bearing and a magnetic thrust bearing to reduce the size of the thrust area for better dynamic stability and reduction in stresses of material. A double gripping centrifugal chuck is mounted in the hollow ceramic shaft, and reduces drill bit runout.

Abstract: The lug nut taper trueing tool includes a first disk which is positioned on one side of an automobile racing wheel and a second disk which is positioned on an opposite side of the wheel. The first disk has an extension sized to fit and extend within the center wheel hole of the automobile wheel. The first disk has a center bore, and a plurality of holes which are alignable with lug nut holes of the wheel. A bushing is positioned and secured within the plurality of holes of the first disk and has a flange which fits and extends within the lug nut holes of the wheel. The bushing has a bore for insertion of a pin, which is attached to a cutting tool. The second disk is attached to a threaded shaft, which is engagable with the first disk for securing the first disk, second disk, and wheel together. The cutting tool has at least one cutting edges and may have either a handle for a person to manually rotate the cutting tool or a shaft end for attachment to an automatic rotation device.

Abstract: The present invention is directed to a device for limiting the force exerted on an actuating mechanism for a binding device and/or a perforating/punching device, with the actuating mechanism being comprised of a rotary shaft coupled to the corresponding movable part of the binding and/or perforating/punching device, such that a rotary motion of the shaft is converted into a translational motion of the corresponding movable part of the binding and/or perforating device. There; is provided in the actuating mechanism a coupling mechanism which performs a decoupling function automatically when the force exerted on the actuating mechanism exceeds a maximum permissible value.

Abstract: The invention relates to a broaching machine comprised of a machine table for receiving a workpiece and being mounted in a machine frame. There is a platform which is driven so as to be displaceable relative to the table, as well as of one or more of axially operating broaching tools, which can be coupled with the platform. The machine table and the platform are displaceable in oppositely oriented directions. The machine table and platform are preferably driven via a common spindle drive. The spindles have two oppositely oriented threaded sections and the machine table and platform each are mounted on one of the two oppositely oriented threaded sections for a driving connection.

Abstract: A crankshaft (6) is rotated about its axis (7), and all of its crankpins (28, 29, 30), which each respectively have an eccentricity (e) relative to the axis (7), and all of its main bearing pins (62, 63, 64, 65), which each have non-eccentric cylindrical surfaces, are simultaneously rotary milled by respective first and second allocated rotary milling cutters (34, 35, 36, 70, 71, 72, 73) of a milling cutter set (12). The individual first milling cutters (34, 35, 36) each respectively have an eccentricity (e) corresponding to the eccentricity of the respective crankpin that is to be machined by the respective first milling cutter, while the second milling cutters are non-eccentric circular cutters. The milling cutter set (12) is rotated at the same rotational speed, i.e. with a rotational speed ratio of 1:1, relative to the rotating crankshaft, while simultaneously the milling cutter set is moved in the X-direction toward the crankshaft axis to achieve a feed advance.

Abstract: A new and improved tool driver having a shaft with a longitudinal axis and opposite ends. A boss is secured at one of said shaft ends by which the tool driver is connected to a rotary tool. A tool collate is secured at the other of the shaft ends by which the tool driver may be driven by a surgical hand piece having a chuck in which the collate may be positioned. The boss has a distal end surface with a groove therein. Both the groove and the distal end surface extend transversely of the axis. A pin is positioned in the groove on the axis. A latch mechanism is provided to hold a mounting bar of a rotary tool in the groove on the pin, whereby the rotary tool is held exactly coaxially of the driver during use. The rotary tool which is used with the driver has a bar which has the same dimensions as the groove in the boss of the tool driver of the invention. The bar thus fills the slot and is complementary to the slot. The bar has a hole therein which is complementary to the pin.

Abstract: The drilling tool (1) has a drilling segment (4) and a shaft segment (3) with a hexagonal cross section for a torsionally rigid connection with a conventional driving machine. A combination drilling tool having different functional segment on opposite ends thereof for performing two different and sequential work operations.

Abstract: Disclosed is an automatic printed circuit board two-bevel forming machine which includes a conveyer, a first cutter assembly which is disposed above the conveyer, and a second cutter assembly which is disposed below the conveyer. The first cutter assembly includes a first rough and a first fine bevel cutter. The second cutter assembly includes a second rough and second fine bevel cutter. The rough and fine bevel cutters of the first and second cutter assemblies incline at a suitable angle toward the upper and lower edges of the PCBs being conveyed. The rough and fine cutters stretch or shrink to a suitable position controlled by a pneumatic driving device. When the PCBs pass through the first and second cutter assemblies sequentially by means of the conveyer, the rough and fine bevel cutters of the first cutter assembly cut and grind the upper edge to form an upper fine bevel, and the rough and fine bevel cutters of the second cutter assembly cut and grind the lower edge to form a lower fine bevel.