Abstract: Labor required for knowing what extent of bending of a plate corresponds to what degree of angle of the bent portion is reduced. A bending angle detection apparatus (50) has a sensor ring L (64), a holder (62), bearings (70), the motor body of a servomotor (60), and a rotation angle sensor (102). The sensor ring L (64) produces a signal corresponding to whether the apparatus is contacted with a blade member plate or not. The holder (62) and the bearings (70) rotatably connect the sensor ring L (64) to a bending machine. The motor body of the servomotor (60) drives the sensor ring L (64) so that it is rotated. The rotation angle sensor (102) detects the rotation angle of the sensor ring L (64). In addition, the holder (62) and the bearings (70) connect the sensor ring L (64) to the bending machine so that the rotation axis of the blade member plate in the case where the bending machine bends the blade member plate coincides with that of the sensor ring L (64).

Abstract: The invention relates a bending angle detection apparatus in which labor required for a work of bending a plate can be reduced. According to the invention, a bending angle detection apparatus (50) has a sensor ring L (64), a holder (62), bearings (70), the motor body of a servomotor (60), and a rotation angle sensor (102). The sensor ring L (64) produces a signal corresponding to whether the apparatus is contacted with a blade member plate or not. The holder (62) and the bearings (70) rotatably connect the sensor ring L (64) to a bending machine. The motor body of the servomotor (60) drives the sensor ring L (64) so that it is rotated. The rotation angle sensor (102) detects the rotation angle of the sensor ring L (64). In addition, the holder (62) and the bearings (70) connect the sensor ring L (64) to the bending machine so that the rotation axis of the blade member plate in the case where the bending machine bends the blade member plate coincides with that of the sensor ring L (64).

Abstract: An automatic bending machine produces a steel rule punching die to be used for forming predetermined notch lines or fold lines in a paper strip, a sheet, a board member, or the like in production of a paper container or a corrugated box. The automatic bending machine has a bending tool which bends a band blade into a predetermined shape. In the machine, a diamond grinder which is laterally and vertically moved by a computer control is disposed in front of the bending tool. When the bending tool is combined with the diamond grinder, bending of the band blade, linear cutting of the both ends, nicking of a blade edge, bridging (notching) of a blade bottom, and broaching (slotting) of a blade side wall are enabled.

Abstract: A method includes: a step of bending the blade member in the width direction; and a step of, after the bending process, bending the blade member in the thickness direction. In the width-direction bending step, the blade member is clamped by a pair of rotary press claws. In the thickness-direction bending step, a thickness-direction bending shaft, and a thickness-direction bending cylinder are included, a blade member passing hole is penetratingly formed in the thickness-direction bending shaft in a direction perpendicular to the axis of the thickness-direction bending shaft, first and second openings which are opposed respectively to outlet and inlet opening ends of the blade member passing hole are formed in the thickness-direction bending cylinder, and the blade member which is passed from the blade member passing hole to the first opening via the second opening is bent in the thickness direction by relatively rotating the thickness-direction bending shaft 31 and the thickness-direction bending cylinder.

Abstract: In the width-direction bending step for the blade member, the blade member is clamped by a pair of rotary press claws 13, 14 from both sides in the thickness direction to be compressed in the thickness direction, whereby the compressed portion is extended in the longitudinal direction of the blade member and the blade member is bent in the width direction. In the thickness-direction bending step for the blade member, a working die portion comprises: a thickness-direction bending shaft 31; and a thickness-direction bending cylinder 32 which is fitted in a turning paired state onto the thickness-direction bending shaft. The thickness-direction bending shaft 31 and the thickness-direction bending cylinder 32 are relatively rotated, whereby the blade member is bent in the thickness direction.

Abstract: A process of bending a strip-like blade member in the width direction, and that of bending the blade member in the thickness direction are caused to be continuously performed. A method includes: a step of bending the blade member in the width direction; and a step of, after the bending process, bending the blade member in the thickness direction. In the width-direction bending step for the blade member, the blade member is clamped by a pair of rotary press claws 13, 14 from both sides in the thickness direction to be compressed in the thickness direction, whereby the compressed portion is extended in the longitudinal direction of the blade member and the blade member is bent in the width direction.

Abstract: A blade material cutting device for producing a blade material used as a punching blade. Included are: a stationary blade part having a pair of front and rear support faces on which a strip plate part and a blade edge part of the blade material are to be overlaid, and which are separated from each other by a gap in a feeding direction of the blade material; a pair of opposed front and rear stationary edges which are disposed in the pair of support faces; a movable blade part which moves into and out of the mutual gap between the pair of support faces; and a pair of front and rear movable edges which are disposed in the movable blade part. When the blade material is overlaid on the support faces and the movable blade part is moved, a disposal portion of the blade material is cut away, and the shapes of the front and rear ends of the blade material are not bent but are maintained in their original shape.

Abstract: An automatic bending machine produces a steel rule punching die to be used for forming predetermined notch lines or fold lines in a paper strip, a sheet, a board member, or the like in production of a paper container or a corrugated box. The automatic bending machine has a bending tool 1 which bends a band blade 12 into a predetermined shape. In the machine, a diamond grinder 20 which is laterally and vertically moved by a computer control is disposed in front of the bending tool 1. When the bending tool is combined with the diamond grinder, bending of the band blade, linear cutting of the both ends, nicking of a blade edge, bridging (notching) of a blade bottom, and broaching (slotting) of a blade side wall are enabled.

Abstract: In the width-direction bending step for the blade member, the blade member is clamped by a pair of rotary press claws 13, 14 from both sides in the thickness direction to be compressed in the thickness direction, whereby the compressed portion is extended in the longitudinal direction of the blade member and the blade member is bent in the width direction. In the thickness-direction bending step for the blade member, a working die portion comprises: a thickness-direction bending shaft 31; and a thickness-direction bending cylinder 32 which is fitted in a turning paired state onto the thickness-direction bending shaft. The thickness-direction bending shaft 31 and the thickness-direction bending cylinder 32 are relatively rotated, whereby the blade member is bent in the thickness direction.

Abstract: A blade material cutting device has a stationary blade part with a pair of front and rear support faces which are separated from each other by a gap. A pair of opposed front and rear stationary edges are disposed in the pair of support faces. A movable blade part which moves between the members of the stationary blade part. The movable blade part includes movable edges which cooperate with the stationary edges for cutting the blade material.

Abstract: The blade material cutting device of the invention can be employed for producing a blade material (1) that is to be used as a punching blade. The blade material cutting device has: a stationary blade part (10) having a pair of front and rear support faces (13) . . . on which a strip plate part (2) and a blade edge part (3) of the blade material (1) are to be overlaid, and which are placed with being separated from each other by a gap in a direction F of feeding the blade material (1); a pair of opposed front and rear stationary edges (13a) and (15a) which are disposed in the pair of support faces (13) . . . ; a movable blade part (50) which is extracted and retracted with respect to the mutual gap (51) between the pair of support faces (13) . . . ; and a pair of front and rear movable edges which are disposed in the movable blade part (50).

Abstract: This invention aims at a bending process in the width direction on a blade member (1) without leaving any unprocessed portion. According to the present invention, the thickness-deviating process of making the front end edges (41, 51) of dies (4, 5) into a portion near the blade point (12) and flowing material of the blade member (1) is carried out. The thickness-deviating process is carried out at plural positions in the length direction on both sides of the blade member (1). By making the linear shapes of the front end edges (41, 51) meet each other in the width direction of the blade member (1), the thickness-deviating process is carried out.

Abstract: Method and apparatus for making a rotary die blade from a straight blade blank to be conformable to the contour of the rotary die block include inserting a blade blank between a first press face of a first presser and a second press face of a second presser; and compressing the blade blank by urging either of the first press face or the second press face to the other, thereby elongating the blade blank along its length; wherein the compressive force is differentiated such that a stronger compressive force is applied to the peripheral portion of the blade blank than the inner portion thereof.

Abstract: Method and apparatus for making a rotary die blade from a straight blade blank to be conformable to the contour of the rotary die block include inserting a blade blank between a first press face of a first presser and a second press face of a second presser; and compressing the blade blank by urging either of the first press face or the second press face to the other, thereby elongating the blade blank along its length; wherein the compressive force is differentiated such that a stronger compressive force is applied to the peripheral portion of the blade blank than the inner portion thereof.

Abstract: The present invention relates to a band-blade cutting tool which is used for cutting a band blade that is a so-called Thomson blade, and also to a band-blade working apparatus having a function of cutting such a band blade into a predetermined shape and like functions. A band-blade cutting tool has: a pair of edged members having cutting blades; miter-cutting portions M which are disposed on the cutting blades to obliquely cut a blade portion of a band blade; straight-cut portions S which straight cut the blade portion of the band blade; and the like. The band-blade working apparatus has a bending mechanism a pair of band-blade cutting tools and the like. The pair of band-blade cutting tools are distributedly placed in the front and rear sides of the bending mechanism.

Abstract: The present invention relates to a method of working a band blade that is a so-called Thomson blade. In the invention, a band blade 1 is bent into a predetermined shape by a bending mechanism 7, the bent band blade is then forward fed, and a rear portion of a bent region Z of the band blade 1 is cut away by using a front band-blade cutting tool 2 which is placed in front of the bending mechanism 7. In the invention, in advance of bending of the band blade 1, a step of cutting the front end of the band blade 1 by using a rear band-blade cutting tool 2 which is placed in rear of the front band-blade cutting tool 2 may be conducted. After the front end of the band blade 1 is cut by using the rear band-blade cutting tool 2, the band blade 1 is forward fed, a bridge 14 is formed in the band blade 1 by using a bridge punching mechanism 8, and the band blade 1 is then forward fed to be bent into a predetermined shape by the bending mechanism 7.

Abstract: It is desirable to accurately subject a process object region of a long edged strip material to notching and bending processes. A bending apparatus and a notching apparatus are used. The process object region of the long edged strip material which is passed through an outlet of a die member of the bending apparatus is subjected to a notching process conducted by the notching apparatus. Next, the process object region is subjected to a bending process performed by the bending apparatus. Finally, the process object region is cut off from a not-yet-processed region. An encoder measures a pulled-out amount of the edged strip material obtained when the edged strip material is pressed by a presser against a shaping face of the outlet of the stationary die so as to be bent. A servomotor is operated by a rotation number in which the measured value of the encoder is considered, so that the edged strip material is fed by a predetermined length.

Abstract: The present invention relates to an apparatus for bending a strip material such as a band blade. A stationary die having a slit through which the strip material is passed is integrated with a shaft body. A movable die which cooperates with the stationary die to bend the strip material is formed into a cylindrical shape. The rotation is transmitted from an electric motor, only to one end of the movable die. The replacement of the stationary die is facilitated by attaching the lower end of the shaft body by mounting bolts to a machine base through a mounting member. When the stationary die is to be replaced, the mounting bolts are removed, the shaft body and the mounting member are pulled out to the lower side of the machine base, and another shaft body is inserted from the lower side of the machine base, and the mounting member is fixed to the machine base by using the mounting bolts.

Abstract: An automatic control system for operating the clutch of a car and capable of being attached to cars of manual shift transmission type comprising a servomotor mechanism forwardly and reversely rotated depending upon increase and decrease of supplied voltage to drive a clutch pedal in direction in which a clutch is connected and disconnected; a circuit for converting the rotation number of engine to a pulse output to detect the rotation number of engine; a frequency-voltage converter circuit for supplying to a servomotor an output voltage responsive to said pulse output; and a switching means connected on the way of a voltage supply line extending from the frequency-voltage converter circuit to the servomotor mechanism and changing voltage supplied to the servomotor mechanism by manual or foot operation to forwardly and reversely rotate the servomotor mechanism.