Abstract: In a method of separating a product G connected to a skeleton portion S of work W via a micro joint M, from the skeleton portion, the product is separated from the skeleton portion by striking the skeleton portion in the vicinity of the micro joint to cut off the micro joint from the skeleton. Further, the die pair used for the above-mentioned method comprises a punch 17A provided with a projecting portion 17T at an end thereof and movable up and down; and a die 19A arranged under the punch and formed of an elastic substance. In this method, it is possible to separate products from the skeleton portion of the work efficiently by breaking the micro joints without scratching the products and without generating noise. Further, the separating work of the products from the skeleton portion can be easily automated.

Abstract: A dedicated V-shaped groove forming machine comprises an X-axis slider dislosed over a plate material so as be movable in an X-axis (groove forming direction); a Z-axis slider supported by the X-axis slider so as to be movable in a Z-axis direction (vertical direction) ; and plural cutting tools mounted on the Z-axis slider; and a Y-axis carriage for moving a plate material (workpiece) in a Y-axis direction (perpendicular to the X-axis direction). Further, there are provided work table adjusting device for adjusting the cutting tool movement locus in parallel to the work table aria tool height detecting device determining an origin in the Z-axis direction, etc.

Abstract: An upper tool holder apparatus (1) for removably supporting an upper tool (9) on an upper table (3) of a press brake includes: a holder body (5) removably attached to the upper table; an upper tool clamp (11) attached to the holder body, for pushing and fixing an upper portion of the upper tool to a support plate (7) provided at a lower portion of the holder body; a clamping force adjusting device (13) for adjusting a clamping force of the upper tool clamp; and a clamp releasing device (15) for releasing the upper tool clamped by the upper tool clamp. In particular, a wedge-shaped member (17) vertically movably provided at a lower portion of the upper tool clamp is formed with a stop portion (17K) engageable with and disengageable from an engage portion (9K) formed in the upper tool (9).

Abstract: A spot welder apparatus includes: a single welding power source (5); a welding current distributor (7) connected to the single welding power source; and a plurality of spot welders (1A, 1B, 1C) connected to the welding current distributor. Each of a plurality of the spot welders is activated alternately by welding current distributed by the welding current distributor. When two start signals are generated almost simultaneously, a first spot welder which generates the start signal earlier is activated, and a second spot welder which generates the start signal later is kept under pressurized condition. Immediately after the first spot welder is deactivated, the second spot welder is then activated. The spot welder apparatus is low in cost and small in installation space, without increasing the user' current capacity.

Abstract: A tool grinding machine which can grind the cutting edge of a punch without disassembling the punch body from the punch assembly and further can grind the cutting edge of the upper surface shoulder portion of the die. Further, the punch and die of various shapes can be ground easily by selecting an appropriate previously stored operation mode determined according to grinding conditions. The tool grinding machine is made up of a rotary table rotatably disposed on a slider supported on a base movable in the right and left direction; and a grinding tool disposed axially away from the rotary table and rotatable and movable in an axial direction of the rotary table, for a grinding workpiece fitted on the rotary table.

Abstract: In front of a bending machine is arranged a unit of a 5-axis control robot provided with a work hand at an end thereof, for loading work to the bending machine and unloading a bent work from the bending machine. A single-work taking-up device takes up only a single work from stacked works. Therefore, the work loading and unloading device is low in cost and requires a short program preparation and teaching (setup) time. The work loading and unloading device may be moved to any desired position and is provided with a work hand having a double-work take-up detecting device and an upper hand accessible to a bent work without interference with the punch.

Abstract: In an upper tool, a stripper plate (35) is disposed movably up and down at a lower end portion (13a) of a punch guide (13) for housing a punch (27) also movably up and down, via a shock damping member (33). Further, the shock damping member (33) is formed into an annular body disposed so as to enclose an annular gap (X) formed between the lower end portion (13a) of the punch guide (13) and the upper surface (65) of the stripper plate (35). The upper tool can reduce noise sound generated during punching processing, and further prevent chips produced during punching processing from adhering onto the workpiece and the shock damping member, thus protecting the workpiece from being scratched by the chips and further improving the life time of the shock damping member.

Abstract: A stripper device for a punching tool comprises: a gas cylinder (5) filled with a gas (7) having a cylinder head (27) and a cylinder end (17) attached to a lower end of the cylinder head airtightly; and a piston (9) having a punch head (11) and a piston rod (15); an axial movement restricting member (13, 201) for restricting an axial movement of the piston in the gas cylinder filled with the gas; and a rotational movement restricting members (31; 205, 203) for restricting a rotational movement of the piston in the cylinder body. A stripping force of the stripper device can be obtained by a resilient force generated whenever the gas is compressed by the piston within the gas cylinder for each punching operation. The punch assembly enables plate material of various thicknesses to be punched out without generating stripping miss.

Abstract: In a turret punch press 1 provided with an upper rotatable turret 5 having a plurality of punches P and a lower rotatable turret 7 having a plurality of dies D, a diameter of the lower turret 7 is determined to be larger than that of the upper turret 5; rotational centers of the upper and lower turrets 5 and 7 are determined to be eccentric from each other; and on a line obtained by connecting the two rotational centers of both the upper and lower turrets when seen on a plane, a position at which the upper and lower turrets 5 and 7 are overlapped upon each other is determined to be a punching position 21 and positions remotely opposite to the punching position 21 and at which the upper and lower turrets 5 and 7 are separated from each other are determined to be indexing positions 61 at which the angular positions of the punch P and the die D can be both indexed.

Abstract: In a spot welding apparatus in which a column (7) is stood on a base (5) provided with a worktable (3) for supporting work (W); and a welding arm (15) having an electrode (13) at a free end portion thereof is pivotally supported up and down at a lower portion of a support cylinder (11) hung from a support beam (9) supported by the column (7) horizontally, the spot welding apparatus comprises an arm supporting section (47) for supporting support members (49, 55, 53, 57) for pivotally supporting the welding arm (15), so as to be movable up and down relative to the support cylinder (11) and further urged upward; and an arm pressing section (37) for pressing a free end portion of the welding arm (15) downward against an urging force of the arm supporting section.

Abstract: An upper tool for a press brake is removably attached on an upper tool holding device mounted on an upper table of the press brake, and includes a wedge portion having a contact surface brought into contact with a lower surface of a support plate provided on a holder body of the upper tool holding device. A slide surface is slidably brought into contact with any of front and rear surfaces of the support plate, and a clamp surface is brought into pressure contact with a pressing-down and fixing section of an upper-tool pressing-down and fixing member of the upper tool holding device. A work processing portion processes a workpiece in cooperation with a lower tool. Further, an upper tool holding device for a press brake, for removably mounting and supporting an upper tool on an upper table of the press brake, includes a holder body attached to the upper table.

Abstract: An upper tool (9) for a press brake, the upper tool being clamped to a supported body (5) mounted on an upper table (3) by a clamping force of a pressing-down and fixing member (11), includes: a shank to be clamped being formed with an inclined surface (9c) for gradually increasing the clamping force of the pressing-down and fixing member (11) to the upper tool (9) by relative movement of the upper tool (9) to the support body (5).

Abstract: A transfer device for transferring elongate bars with respect to a spatial storing system which includes a shelf frame provided with vertically arranged multiple shelves constituted of a plurality of supporting beams for carrying the bars, comprising: a movable beam (23) disposed above the shelf frame and extending in a longitudinal direction of the bars, the movable beam being movable in a direction perpendicular to the longitudinal direction of the elongate bars; a lifting beam (35) vertically movably mounted on the movable beam; and a plurality of lifting arms (33) attached to the lifting beam and extending, for carrying the bars, in the direction perpendicular to the longitudinal direction of the bars, the lifting arms being extrudable and recedable separately or simultaneously in a longitudinal direction thereof in relation to length of the bar to be carried.

Abstract: An upper tool for a press brake includes a push actuating section (9K, 107, 9U) for actuating upward an actuated member (17, 103P, 121) movable up and down, in a clamping force increasing mechanism such that an upper tool clamping force can be increased gradually when the actuated member (17, 103P, 121) mounted on an upper holder device (1) of the press brake is moved upward. An example of the push actuating section is a lower surface of an engage groove portion (9K) extending horizontally and formed in any of front and rear surfaces of the upper tool (9). Further, the engage groove portion (9K) is formed between a vertical position roughly the same as a holder contact surface (9F) formed at a shoulder portion of the upper tool (9) and another vertical position slightly lower than an upper end of the upper tool.

Abstract: A new blade, and a method of cutting therewith, having repeating sets of teeth, each set having sub-sets which differ from each other in at least one cutting characteristic including straight teeth, primary cutting teeth which are left-sided and right-sided and secondary cutting teeth which are left-sided and right-sided, said secondary cutting teeth having a large relief angle.

Abstract: In a follow-up slotting tool for continuously punching workpiece (W) fed between a punch (3) and a die unit (5) at a predetermined pitch, the punch (3) is formed with a shear angle (.alpha.) at a lower end surface thereof in such a way that a front end of the punch is cut into the workpiece but a rear end thereof is not cut into the workpiece when lowered at a predetermined downward stroke; and the die unit (5) is provided with a counter member (15) for raising a residue (W.sub.A) partially cut away from the workpiece, after the punch has been lowered at the predetermined downward stroke, and with a cutting edge (21) for cutting off the partially cutaway residue (W.sub.A) raised by the counter member in cooperation with the punch, when the punch is lowered at the succeeding predetermined downward stroke.

Abstract: A lower tool device for a press brake comprises: a T-shaped slot (19) extending in front and rear direction formed in a tool holder block (17) or between two adjacent tool holder blocks (17) mounted on a lower table (5) of a press brake; a flange member (23) movable into and from the slot and provided under a support rod (21) vertically disposed on an under surface of a tool (9) mounted on the tool holder block (17); a push member (27) attached to the tool holder block, for pushing the flange member downward; and a push urging device (27) for urging the push member so as to further push the flange member downward.

Abstract: A dedicated V-shaped groove forming machine comprises an X-axis slider disposed over a plate material so as be movable in an X-axis (groove forming direction); a Z-axis slider supported by the X-axis slider so as to be movable in a Z-axis direction (vertical direction); and plural cutting tools mounted on the Z-axis slider; and a Y-axis carriage for moving a plate material (workpiece) in a Y-axis direction (perpendicular to the X-axis direction). Further, there are provided work table adjusting device for adjusting the cutting tool movement locus in parallel to the work table and tool height detecting device for determining an origin in the Z-axis direction, etc.

Abstract: A bar storage apparatus comprises: a shelf frame (19) provided with a plurality of pallet accommodating shelves (17) each for movably accommodating a pallet (15) on which a plurality of bars are mounted; an elevator device (23) disposed on one side of the shelf frame so as to be movable up and down and provided with a traverser (21) for moving each pallet into and from each of the pallet accommodating shelves; and a bar supplying device (25) for supplying a bar, mounted on the pallet moved from the pallet accommodating shelf and further located at a predetermined position by the elevator device, to a bar processing machine (3). The bar storage apparatus can store a great number of bars of various kinds and various dimensions, select any required bars from a great number of bars, and supply the selected bars to a bar processing machine easily and quickly.

Abstract: A two-speed linear actuator with high thrust and a high speed of translation for a machine, particularly a bending press. A linear actuator for a machine, particularly a bending press, having first and second bodies (2, 4) mounted for sliding relative to each other and a male-and-female screw mechanism (14) for controlling a relative sliding movement of the two bodies along a working line. The male screw (16) and the female screw (27) are supported for rotation by the first and second bodies (2, 4) and can be rotated by respective electric motors (24, 38). The motors (24, 38) are associated with respective speed-reduction devices (22, 26 and respectively 36) having substantially different reduction ratios. The actuator further includes a braking device (42, 44) associated with the member of the male-and-female screw mechanism (14) which is connected to the speed reduction device (22, 26) with the lower reduction ratio.