Abstract: A scrap floating prevention mechanism comprises: a die holder formed with a first communication pipe which sends compressed fluid; a mounting table formed with a second communication pipe which comes into communication with the first communication pipe and which sends compressed fluid to the first communication pipe, the die holder being placed on and fixed to the mounting table; and a fluid injecting member which is formed with a plurality of inclined injecting pipes for injecting compressed fluid from the first communication pipe and which is provided below the die.

Abstract: A band saw machine which has an endless band saw blade hung around a driving wheel and a driven wheel rotatably supported by a saw blade housing that is capable of moving vertically. The band saw machine also includes a pair of guide posts for vertically guiding the saw blade housing between the driving wheel and the driven wheel, wherein an upper traveling part of the band saw blade is disposed at one side of the front and rear sides of the guide posts, and a lower traveling part of the band saw blade is disposed at the other side of the front and rear sides of the guide posts.

Abstract: A method for utilizing a bending machine die layout includes designating a die layout of a bending machine, the designated die layout being defined by arrangements of replaceable punches and replaceable dies installed on the bending machine. The method also includes extracting, in the designated die layout, segments in each of which a punch and a die face overlapping to each other to be actually used for one of bending processes, as virtual die stages based on punch attachment positions and punch lengths of the punches, and die attachment positions and die lengths of the dies. The method further includes assigning, by using a sheet metal shape model of a bent product planned to be made by the bending machine, bend lines on the sheet metal shape model corresponding to actual bend lines of the bent product, to the virtual die stages.

Abstract: In a method for marking on a surface of a work, kept is a state where an end of a rotating tool for marking is contacted with a surface of the work, and a rotation of the rotating tool is started at the same time when a relative movement of the work in an X-axis direction and/or in a Y-axis direction relative to the rotating tool is started. According to the above marking method, a width of a marked line can be made constant over its entire length.

Abstract: A punch press includes plural dies and plural punches, and punches a work by a punch and a die that are set at a work position. The punch press includes a lifter for lifting the die to be set at the work position up to a path line of the work, a die-support member movably provided on a die-side of the lifter, and a die supporter provided on the die-support member for supporting the die set at the work position in a state where the die has been selectively lifted up to the path line by the lifter. According to the punch press, contacts between a work and dies while conveying the work can be prevented.

Abstract: The present invention relates to a bending press or “press brake” for bending metal sheets, wherein the press includes at least one linking rod, which rod is oriented substantially perpendicularly to the movement direction, having one end that is fastened to the deformable portion of the second table and having its other end fastened to the housing.

Abstract: In the process of holding a non-toothed section of a band saw blade between a fixed insertion block and a movable insertion block included in a band saw blade guide device, the movable insertion block is moved while a return allowing unit included in an insertion block moving unit is held in a returnable state, the insertion block moving unit configured to move the movable insertion block toward the fixed insertion block. The band saw blade is firmly held between the fixed insertion block and the movable insertion block. Thereafter, the entirety of the insertion block moving unit, including the return allowing unit, is fixed in an immovable state by a mechanical fixing unit.

Abstract: Disclosed is a main body vise device (7) in a band saw machine, characterized in that: a movable main body vise body (33) is provided to a main body vise bed (31); an upstream movable vise jaw (37) is provided integrally to this main body vise body (33), while a downstream movable vise jaw (41) is movably provided on a downstream side of the main body vise body (33); a first pressing/biasing module (43) capable of advancing and retreating the main body vise body (33) is provided; and a second pressing/biasing module (45) capable of advancing and retreating the downstream movable vise jaw (41) independently of the upstream movable vise jaw (37) is provided.

Abstract: A workpiece cutting method utilizing a band-saw machine, includes the following steps of: guiding tooth tips of an endless band-saw blade provided on the band-saw machine in a direction of a workpiece by a band-saw blade guiding apparatus; and applying vibrations to the band-saw blade in a cutting direction to the workpiece so as to perform cutting of the workpiece by a vibration applying unit provided on the band-saw blade guiding apparatus.

Abstract: A nesting data generation device generates nesting data for cutting off a part from a work supported by plural support projections. The nesting data generation device includes a nesting data generating unit that generates the nesting data by arranging a geometry of the part on the work. The nesting data generating unit performs, upon arranging the geometry of the part on the work, an avoidance process for avoiding an impediment due to the support projections. According to the nesting data generation device, the part can be prevented from welding on the support projections and the support projections can be prevented from welding upon arranging the geometry on the work by considering positions of the support projections, so that a drop-off and an inclination of the cut part can be prevented.

Abstract: A burr removing method includes: pressing, by using a work pressing device (7), the upper surface of a work (W) around a work edge (WE), along which a burr occurs, so as to be relatively freely movable, the work (W) held on a work table in a plate material processing machine so as to be freely movable in X- and Y-axis directions; when the work (W) relatively moves with respect to the work pressing device (7) in the X- and Y-axis directions, vibrating a striker (35) vertically, the striker (35) provided at a position below the work pressing device (7) so as to be freely vertically movable; and, when the striker (35) moves upward, crushing the burr.

Abstract: A band saw blade includes left and right set teeth which are set in right and left directions with respect to a running direction of the band saw blade, and a straight tooth which is not set. A ridge line at a tip of each of the set teeth and the straight tooth is formed into a convex curved line protruding most at a central portion in a thickness direction of the saw tooth. The ridge lines at the tips of the left and right set teeth and of the straight tooth are continuous with one another when viewed from the running direction of the band saw blade. A height difference between the ridge lines of the saw teeth is in a range of 0.02 mm to 0.1 mm. Meanwhile, a height difference between an inner corner portion of each of the left and right set teeth and the central portion in the thickness direction of the ridge line of the straight tooth is in a range of 0 mm to 0.03 mm.

Abstract: A punch tool device vertically movably mounted in a punch mounting hole (5) formed in a punch holder (3) of a punch press includes: a punch body (41) vertically movably provided inside a tubular punch guide (17) vertically movably mounted in a punch mounting hole (5), the punch body (41) including a punch edge section (101) in its lower end portion; an elastic member (35) provided between the punch guide (17) and a punch head (33) provided on an upper end portion of a punch driver (31) provided above the punch body(41); a supported section (19) supported by a lifter spring (7) provided to the punch holder (3) and provided on an outer peripheral surface of the punch guide (7); and a lubricating oil path (93U) provided in the outer peripheral surface of the punch guide (17) in such a way as to communicate with a lubricating oil supply path (83) formed in the punch body (41), the lubricating oil path (93U) provided in a way capable of coming into and out of communication with a lifter spring containing hole (9)

Abstract: A scrap floating prevention mechanism comprises: a die holder formed with a first communication pipe which sends compressed fluid; a mounting table formed with a second communication pipe which comes into communication with the first communication pipe and which sends compressed fluid to the first communication pipe, the die holder being placed on and fixed to the mounting table; and a fluid injecting member which is formed with a plurality of inclined injecting pipes for injecting compressed fluid from the first communication pipe and which is provided below the die.

Abstract: Concave/convex portions are consecutively formed on a back of a band saw blade. The concave/convex portions include concave portions engageable with and disengageable from a backup guide of a band saw guide unit, and convex portions adjacent to the concave portions. A length of each of the concave/convex portions is configured to be equal to or smaller than four times a maximum pitch of a tooth top of each tooth.

Abstract: A stripper plate mounting apparatus is for mounting a stripper plate (21) in a detachable and replaceable manner on a front end portion of a punch guide (5) into which a punch (17) is fitted movably upward and downward. The apparatus includes: an adaptor (35), for holding the stripper plate (21), detachably provided in a front end portion of the punch guide (5); and lock mechanisms (43), capable of fixing the adaptor (35) to the punch guide (5), provided in multiple locations on the outer periphery of the front end portion thereof. The lock mechanisms (43) each include: a lock piece (53) which is always biased outward in a radial direction by biasing means, and which is engageable with, and detachable from, the lock part (41); and a lock-holding piece (63) for locking and holding the lock piece (53) to an inward position when the lock piece (53) is pressed and moved inward in the radial direction.

Abstract: A punch tool is provided. The punch tool may include a punch guide, a punch body movably provided in a vertical direction in the punch guide, a body cap surrounding an upper end of the punch body, wherein the upper end of the punch body is screw-fitted to a screw-fitting part inside of the body cap, and a punch chip detachably provided in the punch body, wherein the punch body is elongated in a radial direction thereof and the punch chip is elongated in the radial direction of the punch body. The punch tool may also include one positioning locking part provided so as to position the punch chip with respect to the punch body, wherein the positioning locking part is located at a position away from a center position of the punch chip.

Abstract: A bending apparatus for bending a work using a punch mounted onto an upper table and a die mounted onto a lower table by operation of a ram consisting of the upper table or the lower table includes: a machining information determining means for determining bending sequences, tools, tool layouts, and work positions, based on product information; a tool management database for accumulating numbers of uses of each tool that actually bent the work along with operation of the ram, based on the determined work positions, tools and tool layouts; a number of uses of tool detecting means for detecting number of uses of each mounted tool, referring to the tool management database; and a displaying means for displaying number of uses of relevant predetermined tool, when the detected number of uses of each tool becomes equal or approximate to a durable number of uses, or when a display command signal from a worker side is input.

Abstract: A method of cutting off a workpiece using a band saw blade. Chatter oscillation of the band saw blade is detected, the detected chatter oscillation is input to a pulse generator, and pulses based on the inputted chatter oscillation with a frequency not less than a characteristic frequency of a band saw blade supporting system are input from the pulse generator to the motor for imparting to one of the driving wheel and the driven wheel a forced longitudinal oscillation so that a phase of an oscillation the driving wheel along a rotational direction for the driving wheel is substantially inverted with respect to a phase of an oscillation of the driven wheel along a rotational direction of the driven wheel.

Abstract: A band saw machine includes a driving wheel and a driven wheel around which an endless band saw blade is wound. At least one of the driving wheel and the driven wheel is directly connected to an output shaft of a control motor. The output shaft of the control motor is arranged in a cylindrical bearing unit installed on a motor base supporting the control motor. The driving wheel is rotatably supported by the bearing unit.