Abstract: Provided are a method for machining a plate material by using a linear saw, and a numerical control saw machine apparatus. The numerical control saw machine apparatus includes: two carrying mechanisms, which are connected to two ends of a linear saw respectively; at least one control motor, configured for adjusting a distance between the two carrying mechanisms; and a pair of vibration motors, configured for driving the vibration of the linear saw, wherein, the distance between the two carrying mechanisms is adjusted by the control motor based on a monitored change in a torque of the control motor.

Abstract: Electric saw being powered by an external power supply through a multicore cable. The multicore cable includes electrical wires for supplying power to the motors of the electric saw and communication wires for data communication between the electric saw and the power supply. Two motors of the electric saw are three phase permanent magnet motors, with an outer rotor and an inner stator. Each of the two motors has three Hall Effect sensors located around the outer rotor.

Abstract: A reciprocating saw including a housing and a reciprocating shaft supported within the housing. The reciprocating shaft has a longitudinal axis and a first end and a second end opposite the first end. A cutting blade is provided at the first end of the reciprocating shaft. A drive mechanism provided at a second end of the reciprocating shaft is configured to drive the reciprocating shaft in a substantially reciprocating motion relative to the housing while at the same time allowing the reciprocating shaft to substantially rotate about the longitudinal axis of the reciprocating shaft independent of the housing.

Abstract: A reciprocating saw including a first end, a working end opposite the first end, and a housing extending between the first end and the working end. A reciprocating shaft is supported within the housing and has a longitudinal axis. A locking mechanism is supported at the housing and is selectively moveable between a first position and a second position. When the locking mechanism is in the first position the reciprocating shaft is configured to substantially reciprocate relative to the housing but remain substantially rotationally fixed relative to the longitudinal axis of the reciprocating shaft. When the locking mechanism is in the second position, the reciprocating shaft is configured to substantially reciprocate relative to the housing and at the same time substantially rotate about the longitudinal axis of the reciprocating shaft independent of the housing.

Abstract: A system for cutting a given portion of a surface of a core insert includes a piezoelectric actuator, a turning tool, a rotating member, a driving unit and a numerically-controlled unit. The controlling unit stores coordinates of the storing coordinates of each point on the given portion of the surface in a predetermined coordinate system, and compares the instant coordinates of the cutting portion of the turning tool with the stored coordinates of the given portion, thus controlling the piezoelectric actuator to drive the turning tool to cut the given portion of the surface if the coordinates of the cutting portion of the turning tool match with the stored coordinates of any point on the given portion of the surface.

Abstract: A reciprocated knife cuts pattern work material pieces without rotating a housing tube for orientation of the cutting knife. An integrated tangent axis drive motor orients the cutting knife, eliminating any inertia caused by the cutting housing tube and preventing the slowing of the angular acceleration and increasing the speed of the knife orientation. Alternative motor types are provided by various embodiments of the invention.

Abstract: An improvement applicable to a laminate film cutter for cutting a thin film covering a planar body having plural partly overlapping short plates, the shape of the knife being a rectangular blade extending to a sharp cutting point, and the position of the knife being inclined downward in a controlled manner to prevent stalling of the feeder during cutting.

Abstract: A planar robot for cutting products, such as pieces of meat. The product is displaced along a conveyor or positioned onto a working table and is cut by a tool, preferably a water jet. The tool is held by a pair of arms. The arms have first extremities pivotally mounted on mobile bases. The arms also have second extremities pivotally connected to each other. An actuator displaces each of the mobile bases in order to control the position of the cutting tool in a plane above the conveyor or table.

Abstract: A mechanism is disclosed for clamping a jigsaw (1) shoe in a desired position relative to the body of a power tool. A plurality of gear (22, 26) teeth are used to allow greater torque and access as compared to prior art clamping mechanisms.

Abstract: A method of cutting pattern pieces from a continuous roll of material comprising the steps of unrolling said material unto a rotating cylindrical cutting surface, and then cutting said material while said material is in rolling contact on said cylindrical surface during rotation of said cylindrical surface. Furthermore this invention describes a method and apparatus for producing vinyl pool covers.

Abstract: A power hand tool foot assembly includes a platform having an arch portion. A swivel lock is within the arch portion, with a mount connecting the swivel lock to the tool housing. A lever is pivotally mounted on the mount. When the lever is in a locked position, the swivel lock and platform are locked in place. When the lever is in an open position, the longitudinal and angular position of the platform and swivel lock may be adjusted.

Abstract: A coping saw includes a housing and a flexible conveyor belt supported by at least three balancing wheels being supported rotatably on said housing. A saw blade is connected with one end of an upper saw blade holding mechanism and one end of a lower saw blade holding mechanism at its two ends respectively. A driving mechanism is driven by a motor and connected to the flexible conveyor belt through a sliding block.

Abstract: Pilot device for a suspended cutting knife of a cutting head of an automatically controlled cutting machine. The cutting head is moved along the X and Y axes and pivots about the Z-axis. The cutting knife is reciprocally movable along the Z-axis. The cutting head includes a device for guiding the unsuspended part of the cutting knife and a pressure foot rigidly connected to the pivotal cutting head. The suspended end of the knife is mounted in the cutting head so as to be freely rotatable around the Z-axis. The guiding device is adjacent to the free end of the knife and comprises a socket rigidly connected to the cutting head having a support which is freely rotatably mounted in the socket around a vertical axis located in front and adjacent to the cutting edge and parallel, at a predetermined distance, to the Z-axis. The support has a slot surrounding the flanks of the knife.

Abstract: Pilot device for a suspended cutting knife of a cutting head of an automatically controlled cutting machine for cutting fabric sheet material spread out on a cutting table in multiple layers. The cutting head is controlled by moving the cutting head along the X- and Y-axes and pivoting about a Z-axis for moving the knife tangently along a predetermined cutting path. The cutting knife is reciprocally movable along the Z-axis. The cutting head includes a device for guiding the unsuspended part of the cutting knife and a pressure foot rigidly connected to the pivotal cutting head. The suspended end of the knife is mounted in the cutting head so as to be freely rotatable around the Z-axis.

Abstract: A hand-held reciprocating power tool, such as a reciprocating saw, wherein the angle of the reciprocation motion axis with reference to the longitudinal axis of the power tool motor housing is adjustable. Within a motor housing there is a motor driving a motor shaft which rotates on a motor shaft axis generally along the longitudinal axis. A nosepiece includes a nosepiece base portion fixed to the motor housing, and a nosepiece movable portion rotably mounted to the nosepiece base portion. The nosepiece moveable portion can be positionally adjusted relative to the nosepiece base portion over an angle of at least 180.degree. by rotation on a nosepiece axis which is perpendicular to the motor shaft axis. A reciprocating element is supported by the nosepiece moveable portion.

Abstract: A blade mounting device is operable for mounting a blade on a drive shaft of a cutting tool which is moved in a predetermined motion for a cutting operation. The blade mounting device includes an operation knob mounted on a body of the cutting tool and adapted to be rotated by an operator. An actuation rod is mounted on the drive shaft and is movable with the drive shaft and rotatable relative to the drive shaft. A holder device is mounted on the drive shaft for holding and releasing the blade in response to the rotation of the actuation rod relative to the drive shaft. A connection member is rotatable with the operation knob and is disposed on the same axis as the actuation rod. A connecting mechanism is provided for connecting the connection member and the actuation rod to each other, so that the connection member and the actuation rod are axially movable relative to each other and are rotatable together with each other.

Abstract: A hand-held reciprocating power tool, such as a reciprocating saw, wherein the angle of the reciprocation motion axis with reference to the longitudinal axis of the power tool motor housing is adjustable. Within a motor housing there is a motor driving a motor shaft which rotates on a motor shaft axis generally along the longitudinal axis. A nosepiece includes a nosepiece base portion fixed to the motor housing, and a nosepiece movable portion rotably mounted to the nosepiece base portion. The nosepiece moveable portion can be positionally adjusted relative to the nosepiece base portion over an angle of at least 180.degree. by rotation on a nosepiece axis which is perpendicular to the motor shaft axis. A reciprocating element is supported by the nosepiece moveable portion.

Abstract: A blade mounting device is operable for mounting a blade on a drive shaft of a cutting tool which is moved in a predetermined motion for a cutting operation. The blade mounting device includes an operation knob mounted on a body of the cutting tool and adapted to be rotated by an operator. An actuation rod is mounted on the drive shaft and is movable with the drive shaft and rotatable relative to the drive shaft. A holder device is mounted on the drive shaft for holding and releasing the blade in response to the rotation of the actuation rod relative to the drive shaft. A connection member is rotatable with the operation knob and is disposed on the same axis as the actuation rod. A connecting mechanism is provided for connecting the connection member and the actuation rod to each other, so that the connection member and the actuation rod are axially movable relative to each other and are rotatable together with each other.

Abstract: An automatically controlled cutting machine for cutting multiple layers of fabric sheet material spread out on a cutting table, the cutting machine including a cutting tool which is rotatable about a Z-axis and which includes a cutting knife mounted on a cutting head and a guiding device for guiding the the cutting knife. One end of the knife is mounted in the cutting head so as to be freely rotatable around the Z-axis, and the guiding device is arranged adjacent to the remaining free end of the knife and comprises a socket rigidly connected to the cutting head, and a support which is freely and rotatably mounted in the socket around a vertical axis located in front and adjacent to the cutting edge of the knife, and parallel and spaced a predetermined distance from the Z-axis. The support has a slot surrounding the flanks of the knife.

Abstract: An automatically controlled cutting machine for cutting multiple layers of fabric sheet material spread out on a cutting table, the cutting machine including a cutting tool which is rotatable about a Z-axis and which includes a cutting knife mounted on a cutting head and a guiding device for guiding the cutting knife. One end of the knife is mounted in the cutting head so as to be freely rotatable around the Z-axis. The guiding device is arranged adjacent to the remaining free end of the knife and comprises a socket rigidly connected to the cutting head, and a support which is freely and rotatably mounted in the socket around a vertical axis located in front and adjacent to the cutting edge of the knife, and parallel and spaced a predetermined distance from the Z-axis. The support has a slot surrounding the flanks of the knife.

Abstract: The present invention pertains to a device for cutting materials and including a straight blade 10, to which are connected two sharpening units 13, 14 with angulation complementary to that of the cutting edge of the blade. Each sharpening unit 13, 14 comprises a support 15 and defines a chamber 16 for a piston 17 and a pneumatic motor 18 contained in the piston, and has an outlet shaft 19 supporting a diamond disk grinding wheel 20 which is advanced towards the blade to be sharpened.

Abstract: In an automated machine for cutting cloth or fabric and similar sheet materials the knife is made from a high-alloy tool steel to provide the knife with a sharp cutting edge capable under a given set of conditions to cut sheet material for a far longer period of time before requiring re-sharpening than the case with the knives previously used in such machines. A sharpener is also provided which allows the knife after becoming dull to be returned to a sharp condition while removing only a minimum amount of the knife material, thereby further increasing the service life of the knife.

Abstract: Energetic material can be rapidly cut or machined at high speed in the substantial absence of liquid coolant with a cutting tool having a rotating cutting surface by maintaining a portion of the cutting surface out of contact with the energetic material and continuously removing the resulting reduced energetic material from the area of the cutting tool.

Abstract: A cutting apparatus for foam sponges with irregular contours comprises a foam sponge clamping mechanism, a cutter driving mechanism, a cutter rotating mechanism, a template, and a main frame. The main frame is equipped with a vertical frame on which are mounted a lead screw, a driving motor, and a clamping mechanism constituted of upper and lower clamping plates that are driven by the lead screw to secure foam sponges.

Abstract: The invention pertains to a saw, in particular to a jig saw or scroll saw, with a saw blade which is driven by a force acting on a parallelogram of rods. A saw blade is attached to a connecting shank which joins two longitudinal side arms. The two longitudinal side arms are designed to move in their longitudinal direction. On at least one of the two longitudinal side arms a guide element in the form of, for example, a turning roller, is positively guided against a stationary guide surface which is at an angle, preferablye an acute angle, to the connecting shank. As a result of this positive guidance, the backward movement of the saw blade from the cut edge during the return stroke is reduced to a desired value. Thus a jig saw of small size, but with a large stroke, can be realized in which the saw blade is guided parallel to the cut edge at all times but is moved back by a small amount from the cut edge during the return stroke.

Abstract: A laminate cutting apparatus includes a cutter head moved horizontally back and forth above a support member which supports a laminate, and a cutting member and piercing blade mounted on the cutter head, with the cutting member comprising a knife-shaped cutting blade or the cutting blade and a cutting blade guide. The upper surface of a cutter rest moved in synchronization with the cutter head and in the same direction is arranged flush with a supporting surface of the support member. There are provided a cutting member receiving body into which receives the cutting member, and a piercing blade receiving body which receives the piercing blade. The cutting member and the piercing blade are adapted so as to turn in the same direction and so as to be raised and lowered independently of each other. Furthermore, the cutting member receiving member is adapted so as to turn in synchronization with the cutting member and in the same direction.

Abstract: A cutter in which a reciprocating knife is driven by an eccentric mechanism. The knife has a drive portion that flexes laterally in a plane perpendicular to the drive axis of the eccentric mechanism. The eccentric drive axis is offset along the perpendicular plane away from the axis on which the knife reciprocates. The offset of the eccentric drive axis allows the flexible drive portion to be kept straighter during the downstroke than in previous cutters. The increased straightening provides greater columnar strength and reduces deflection and stress of the drive portion during the time the knife is in compression. During the upstroke the knife is bent to a greater degree than in the previous cutters, but during this time the knife is in tension, the tension forces opposing rather than aiding the bending. The offset therefore provides for a longer service life for a blade of equal size or allows a reduction in size and mass of the knife to maintain an equivalent service life.

Abstract: A cutting head for cutting spread sheet material and using a vertically reciprocating knife achieves a light-weight, low cost, low maintenance and high stroking speed design through a unique combination and arrangement of parts wherein the knife drive motor is isolated from rotation with the knife about the theta axis without using a conventional swivel mechanism. The knife has a leaf spring portion directly connected to the eccentric member, fatigue failure of the leaf spring portion of the blade is inhibited by antivibration stops and by a varying cross-section, a simple sharpener mechanism sharpens the blade on either one or both side faces, and a roller guide restrains the lower portion of the blade to the vertical axis with minimum frictional loss.

Abstract: A scroller jig saw has a pivoted locking lever spring biased into engagement with a rotatable scrolling control assembly to lock the latter, and therewith the saw blade, against rotation. A cam, preferably rotatably mounted on the scrolling control assembly, is manually movable between a scrolling position in which it holds the locking lever out of engagement with the scrolling control assembly and a non-scrolling position in which the lever is free to be spring biased into locking engagement with the scrolling control assembly.

Abstract: A method and apparatus for cutting compacted crop or silage material are accomplished by a pair of oppositely reciprocating blades which have a pivotal motion about a line lengthwise of the cutting blades.

Abstract: For a powered hand tool having a plastic housing and requiring a slide button with a detent action for at least two positions with an audible indication of the transition from one position to another position, a plastic spring molded as part of the housing and having an arched surface extending into the path of a projection from the slide button which has first and second oppositely disposed tapered sides extending towards each other and terminating in a flat base portion which coacts with the arched surface to provide a detent action and an audible indication of the transition to a new position when the slide button impacts upon abutments formed as part of the housing.

Abstract: An elongated blade has a notch in its leading edge, with parallel chisel edges adapted to chop through the oriented fibers (boron or graphite) of uncured sheet material as the blade is reciprocated vertically at a high frequency relative to its forward velocity (five cycles per blade width). The notch is about half as deep as the blade width and has a vertical extent (between the chisel edges) of about 60 percent of the blade's vertical stroke. The blade has a lower edge which forms a 135 degree angle with it's leading edge, and which lower edge is spaced below the lower notch chisel edge by approximately the width of the blade.

Abstract: An apparatus for cutting sheet material spread in one or more layers over a supporting surface uses a reciprocating cutting blade cutter movable in two coordinate directions in the plane of the supporting surface to enable the cutting blade to follow a desired line of cut relative to the sheet material. The cutting blade has a leading cutting edge that performs the actual cutting operation with a slicing action. During the cutting operation, mechanical means within the apparatus produces blade dither about the axis of reciprocation in synchronism with the reciprocation strokes of the blade.

Abstract: A machine for cutting an elongated layup of sheet material has a conveyor table for supporting the material and advancing it while it is being cut. A carriage assembly moves a cutting tool in cutting engagement with the material on the conveyor table in response to signals from a programmable controller. The conveyor table and carriage assembly are connected in one system so that the programmed movements of the cutter are relative to the movement of the conveyor thereby enabling the material to be cut in accordance with a predetermined program while simultaneously advanced by the conveyor table. Another cutting machine which has a rotary drum conveyor for supporting and advancing sheet material has a movable tool carriage coupled to the drum conveyor for movement relative to the conveyor by a ring gear and pinion.

Abstract: A method for cutting limp sheet material with a rigid, cantilevered blade that is reciprocated as it advances along a cutting path through sheet material employs a load sensor to measure lateral loads applied to the blade by the sheet material during cutting. A load signal from the sensor is applied to the blade controls through a variable gain feedback circuit and causes the blade to be oriented slightly toward the side of the cutting path from which an unbalanced load is applied. The adjustment of the gain in the feedback network is made by means of speed sensors which measure the rate at which the cutting blade advances through the sheet material and adjust the feedback gain in inverse relationship.

Abstract: A device for cutting out and transporting a silage block, comprising a main frame which may be connected to a tractor and which comprises an at least approximately horizontal cross-beam, which carries a plurality of parallel tines and to which an upstanding main frame part is connected. This upstanding main frame part supports near its upper end an at least approximately horizontal frame member, which forms an approximately U-shaped guide along which a drive housing may be reciprocated. A sawing means is guided in this drive housing for upward and downward movement. In both corners of the frame member which are remote from the upstanding main frame part the sawing means is rotatable over at least approximately 90.degree. about an axis of rotation which is at least approximately stationary during this rotating motion and which extends at a distance from the longitudinal center line of the sawing means which is smaller than the width of the sawing means.

Abstract: An apparatus for cutting limp sheet material with a rigid, cantilevered blade that is reciprocated as it advances along a cutting path through sheet material employs a load sensor to measure lateral loads applied to the blade by the sheet material during cutting. A load signal from the sensor is applied to the blade controls through a variable gain feedback circuit and causes the blade to be oriented slightly toward the side of the cutting path from which an unbalanced load is applied. The adjustment of the gain in the feedback network is made by means of speed sensors which measure the rate at which the cutting blade advances through the sheet material and adjust the feedback gain in inverse relationship.

Abstract: Apparatus for cutting patterns from successive contiguous segments of an elongated layup of sheet material has a zoned vacuum table which includes an endless bristle mat conveyor, for shifting a layup along the table to position a segment of the layup in the cutting zone of the table and for holding the layup segment in the cutting zone, and a carriage assembly, which moves a cutting mechanism relative to the table and in cutting engagement with the segment to cut patterns from the segment in response to signals from a programmable controller. A rotary encoder mounted on the carriage assembly has a pinion which engages a rack carried by the conveyor to detect movement of the carriage assembly relative to the conveyor when the carriage assembly returns to its starting position after completing its cutting cycle.

Abstract: A method and apparatus for cutting multi-ply layups of limp sheet material employs an automatically controlled machine with a knife blade and a controller for guiding the blade along cutting paths defined by a marker of pattern pieces. The marker contains a plurality of pattern pieces in a closely packed array which causes the pattern pieces and segments of the cutting paths to be in contact or in close proximity to one another, and makes accurate cutting difficult or impossible. Digitized data defining a cutting program for the marker is preprocessed in a data processor to identify critical segments of cutting paths where cutting difficulties may arise and introduces into the data remedial command signals that guide the cutting blade past the identified critical segments for more accurate cutting.

Abstract: In a fret saw blade having a shank portion and saw-teeth, the saw-teeth are formed in a manner that the centers of the cutting edges of some saw-teeth are depressed and deformed generally in V-shape so as to form sharp ends projecting beyond the side surfaces of the shank portion of the fret saw blade.

Abstract: A method and apparatus for cutting pattern pieces from sheet material with an automatically controlled cutting machine utilizes special control techniques for guiding a reciprocating cutting blade accurately along a desired cutting path defined by the pattern piece peripheries. The cutting machine includes a control computer which also serves as a data processor for generating machine command signals and controlling cutting blade movements. The controller has memory units which contain standard cutting programs and optinal programs. From a program selector panel, the cutting machine operator can select optional programs which modify the standard programs in a manner most suitably adapted to cause the cutting blade to follow the cutting path in the sheet material more accurately. The optional programs vary the feed rate or stroking speed, introduce yaw signals to control blade orientation along the cutting path, or perform other control functions.

Abstract: A method and apparatus for cutting sheet material utilizes a closed loop automatically controlled cutting machine having a reciprocating cutting blade as the cutting tool. Sheet material to be cut is spread in multiple plies to form a layup, and the cutting blade and the material are then moved relative to one another in cutting engagement along predefined lines of cut. During cutting, a sensor detects a cutting parameter that is affected by the interaction of the cutting blade and sheet material, and signals provided by the sensor are fed back in the closed loop automatic control mechanism to adjust or initiate further steps in the cutting operation. Such adjustment or initiation alters the cutting machine operation for cutting conditions in real time in order to improve the overall performance of the machine.

Abstract: A method and apparatus for cutting pattern pieces from sheet material with an automatically controlled cutting machine utilizes special control techniques for guiding a reciprocating cutting blade accurately along a desired cutting path defined by the pattern piece peripheries. The cutting machine includes a control computer which also serves as a data processor for generating machine command signals and controlling cutting blade movements. The controller has memory units which contain standard cutting programs and optional programs. From a program selector panel, the cutting machine operator can select optional programs which modify the standard programs in a manner most suitably adapted to cause the cutting blade to follow the cutting path in the sheet material more accurately. The optional programs vary the feed rate or stroking speed, introduce yaw signals to control blade orientation along the cutting path, or perform other control functions.

Abstract: In an automatic sawing machine wherein a workpiece is moved in two orthogonal directions by a profile control or a numerical control so as to cut a groove of a predetermined profile, the opposite ends of the fret saw blade are synchronously driven by independent pulse motors so as to direct the fret saw blade always in the tangential direction of the profile.

Abstract: A cutting machine having a table on which multi-ply layups of sheet material are positioned during cutting operations utilizes a reciprocating cutting blade that is suspended in cantilevered fashion above the table and lowered into cutting engagement with the material during cutting. The sheet material and blade are moved relative to one another while the blade is oriented to remain tangent to predefined cutting paths followed through the material. A blade guide is mounted in a presser foot which slides over the material, and several guide rollers in the blade guide engage the sides and trailing edge of the blade to control blade positioning immediately above the sheet material.

Abstract: To provide a directional guiding mechanism for saber type and blade control in tools, having a motor, a manipulating handle and a reciprocating shaft in a housing, to which shaft a saw blade, etc., is attached.One concept of the invention is achieved by the use of a unique control mechanism including a rotatable flexible cable by which to rotate the reciprocating saw blade in the cut, in any desired direction, with less movement or turning of the main body of the tool especially in a restricted or cramped area. These operations can be accomplished with the use of but one hand of the operator, leaving the other hand free to hold firm the material to be cut or worked upon.

Abstract: A method and apparatus for cutting sheet material utilizes a closed loop automatically controlled cutting machine having a reciprocating cutting blade as the cutting tool. Sheet material to be cut is spread in multiple plies to form a layup, and the cutting blade and the material are then moved relative to one another in cutting engagement along predefined lines of cut. During cutting, a sensor detects a cutting parameter that is affected by the interaction of the cutting blade and sheet material, and signals provided by the sensor are fed back in the closed loop automatic control mechanism to adjust or initiate further steps in the cutting operation. Such adjustment or initiation alters the cutting machine operation for cutting conditions in real time in order to improve the overall performance of the machine.