CN111246994B

CN111246994B - Plate bending machine

Info

Publication number: CN111246994B
Application number: CN201880067435.4A
Authority: CN
Inventors: 小段规祯
Original assignee: Amada Holdings Co Ltd
Current assignee: Amada Co Ltd
Priority date: 2017-10-16
Filing date: 2018-10-16
Publication date: 2021-01-26
Anticipated expiration: 2038-10-16
Also published as: WO2019078200A1; JP2019072734A; CN111246994A; JP6450820B1

Abstract

The invention provides a bending machine which can stably maintain the processing precision of bending processing by performing the bending processing of a workpiece (W) in a stable posture. A foot switch device (29) of a trigger is configured in such a manner that a pedal housing (45) can swing up and down on a sliding member (37) and has a regulating part (55) which can contact with the ground (F). In addition, the casters (67) which are provided on both sides of the pedal housing (45) in the longitudinal direction so as to be movable in the vertical direction are urged downward with respect to the pedal housing (45) by coil springs (71). When the lowering pedal (57) or the raising pedal (59) is depressed, the foot switch device (29) is configured such that each caster (67) is raised relative to the pedal case (45) against the urging force of the coil spring (71), and the restriction section (55) of the pedal case (45) is brought into contact with the floor surface (F).

Description

Plate bending machine

Technical Field

The present invention relates to a bending machine for bending a plate-shaped workpiece (sheet metal) by cooperation of an upper die (press die) and a lower die (press die).

Background

In recent years, in a plurality of processing stations formed between an upper table and a lower table in a bending machine, a step-by-step type processing in which bending processing is sequentially performed based on a bending order of a workpiece has been widely used. Accordingly, a foot switch device has been developed which can move a pedal housing in a longitudinal direction (a longitudinal direction of a trigger). The movable foot switch device has the following structure (see patent documents 1 to 5, etc.).

A guide member extending in the longitudinal direction is provided on the lower portion of the lower table or on the front side thereof, and a slide member is provided on the guide member so as to be movable in the longitudinal direction. In addition, a pedal housing is provided on the slide member, and a foot switch operable by foot is provided in the pedal housing. The pedal case is classified into a motor driving type that moves in the longitudinal direction together with the slide member by driving of an electric motor and a manual type (manual type) that moves in the longitudinal direction together with the slide member by manual (manual force).

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2016-215230

Patent document 2: japanese patent laid-open publication No. 2016-68143

Patent document 3: japanese laid-open patent publication No. 2006-334600

Patent document 4: japanese laid-open patent publication No. 2004-249335

Patent document 5: japanese patent laid-open publication No. 2000-351018

However, in a foot switch device having a motor-driven pedal case (hereinafter, appropriately referred to as a motor-driven foot switch device), an interlocking mechanism such as a screw mechanism or a belt mechanism is required as a component for interlocking and connecting (interlocking) an electric motor and a sliding member in addition to the electric motor, and the structure of the foot switch device becomes complicated. Further, if there is a change in the layout of the molds (the upper mold and the lower mold), it is necessary to correct the program for controlling the electric motor, and the work becomes complicated.

On the other hand, in a foot switch device having a manual type pedal housing (hereinafter, appropriately referred to as a manual type foot switch device), since a component such as an electric motor is not used, the structure of the foot switch device can be simplified. Even if there is a change in the layout of the metal mold, the position of the pedal case can be changed only by manual (manual) operation without requiring a correction such as a program.

However, in the manual type foot switch device, since the movement of the sliding member in the width direction is not restricted by the interlocking mechanism or the like, when the operator depresses the foot pedal, the pedal case may be inadvertently moved slightly in the longitudinal direction together with the sliding member. In this case, the operator may be out of balance and may bend the workpiece in an unstable posture, which may result in a reduction in the accuracy of the bending.

Disclosure of Invention

Accordingly, it is an object of the present invention to provide a new structure of a toggle actuator capable of solving the problems of the above-described manual type foot switch device. More specifically, an object of the present invention is to provide a bending die capable of bending a workpiece W in a stable posture and stably maintaining the processing accuracy of the bending.

According to an aspect of the present invention, there is provided a bending trigger including a lower table provided at a lower portion of a main body frame and holding a lower die at an upper side, an upper table provided at an upper portion of the main body frame so as to be movable (movable in an up-down direction) and holding an upper die at a lower side, and a movable foot switch device for performing an up-down operation (a lowering operation and a raising operation) of the upper table by a foot operation, wherein a bending process is performed on a plate-shaped workpiece (sheet metal) by cooperation of the upper die (press die) and the lower die (press die), the foot switch device includes a guide member extending in a longitudinal direction and provided at a lower portion of the lower table or another member on a front surface side of the lower table, and a slide member provided at the guide member so as to be movable in the longitudinal direction, The pedal device includes a pedal case provided to the slide member so as to be swingable in the vertical direction, having a restricting portion (contact portion) capable of coming into contact with the ground, and being manually (manually) moved in the longitudinal direction together with the slide member, a pedal plate provided to the pedal case and capable of being operated by foot, rolling bodies (rotating bodies) provided to both sides of the pedal case in the longitudinal direction so as to be movable in the vertical direction and respectively rotated (rotated) in the longitudinal direction on the ground, and urging members for urging the respective rolling bodies in the downward direction with respect to the pedal case.

In the foot switch device, it is preferable that the pedal is configured such that when the foot pedal is depressed, the respective rolling bodies are relatively raised with respect to the pedal case against the urging force of the urging member, and the restricting portion of the pedal case is in contact with the ground.

Further, it is preferable that the pedal housing is configured to be adjustable in height with respect to the guide member.

Preferably, the foot switch device includes an upright column that is provided upright on the pedal case and that can be gripped by the operator.

According to the structure of the bending trigger of the present invention, the step bending is performed in the plurality of processing stations formed between the upper table and the lower table as follows.

The pedal case is moved in the longitudinal direction together with the slide member by hand (manual power) and is positioned at a position corresponding to an initial processing station (a processing station at which bending processing is initially performed). Next, at the first processing station, the workpiece is positioned in the depth direction (depth direction of the bending trigger) with respect to the lower die. The upper table is lifted and lowered by a foot operation of the foot pedal by an operator. Thus, in the first processing station, the first bending processing can be performed on the workpiece by the cooperation of the upper die and the lower die.

After the first bending process is performed on the workpiece, the pedal housing is manually (manually) moved in the longitudinal direction together with the slide member based on the bending order of the workpiece, and is positioned at a position corresponding to a next processing station (a processing station for performing the next bending process). Next, in the next processing station, the work is positioned in the depth direction with respect to the lower die. The upper table is lifted and lowered by a foot operation of the foot pedal by an operator. In this way, in the next processing station, the next bending process can be performed on the workpiece by the cooperation of the upper die and the lower die.

As described above, the pedal housing is configured to be swingable in the vertical direction on the slide member, and includes the regulating portion contactable with the floor surface. The rolling elements provided on both sides of the pedal case in the longitudinal direction so as to be movable in the vertical direction are urged downward with respect to the pedal case by the urging member. Therefore, when the operator steps on the pedal plate, the respective rolling elements are relatively raised with respect to the pedal case against the biasing force of the biasing member, and the restricting portion of the pedal case is brought into contact with the ground. Thus, when the operator depresses the pedal plate, the pedal housing can be prevented from moving slightly in the longitudinal direction together with the slide member.

According to the present invention, when the operator depresses the foot pedal, the workpiece can be bent in a stable posture without losing balance, and the processing accuracy of the bending can be stably maintained.

Drawings

FIG. 1 is a schematic front view of a trigger bend of an embodiment of the present invention.

FIG. 2 is a schematic partial side view of a bend trigger of an embodiment of the present invention.

FIG. 3 is a schematic, partially enlarged front view of a bend trigger of an embodiment of the present invention.

Fig. 4 is an enlarged front view of the periphery of the foot switch device of the bending trigger according to the embodiment of the present invention.

FIG. 5 is an enlarged side view of the periphery of the foot switch device of the bend trigger of the embodiment of the present invention.

Fig. 6(a) and (b) are views illustrating characteristic parts of the foot switch device of the bending trigger according to the embodiment of the present invention. Fig. 6(a) shows a pattern before the lowering pedal or the raising pedal is depressed, and fig. 6(b) shows a pattern after the lowering pedal or the raising pedal is depressed.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In the description and claims of the present application, "disposed" includes not only a case where the member is directly disposed but also a case where the member is indirectly disposed through another member. The "longitudinal direction" is one of the horizontal directions, i.e., the longitudinal direction of the bending trigger, and is referred to as the left-right direction in the embodiment of the present invention. The "depth direction" is one of the horizontal directions, i.e., the depth direction of the trigger, and in the embodiment of the present invention, is the front-rear direction. In the drawings, "FF" represents a front direction, "FR" represents a rear direction, "L" represents a left direction, "R" represents a right direction, "U" represents an upper direction, and "D" represents a lower direction.

As shown in fig. 1 to 3, a bending trigger 1 according to an embodiment of the present invention is a processing machine that bends a plate-shaped workpiece (sheet metal) by cooperation of an upper die (press die) 3 and a lower die (press die) 5. The bending trigger 1 includes a main body frame 7, and the main body frame 7 includes a pair of side plates 9 facing each other in a longitudinal direction (left-right direction) in a spaced manner and a plurality of (only one) coupling members 11 coupling the pair of side plates 9. Each side plate 9 is provided so as to be adjustable in height with respect to the floor surface F by a horizontal bolt 13.

A lower table 15 extending in the longitudinal direction (left-right direction) is provided at a lower portion of the main body frame 7. A lower die holder 17 for detachably holding a plurality of lower dies 5 arranged at intervals in the longitudinal direction is provided above the lower table 15. The levelness of the upper surface of the lower table 15, in other words, the levelness of the upper surface of the lower metal mold, is ensured by the height adjustment of each side plate 9. An upper table 19 extending in the longitudinal direction is provided in an upper part of the main body frame 7 so as to be able to move up and down (so as to be able to move up and down), and the upper table 19 is vertically opposed to the lower table 15. A plurality of upper molds 3 arranged at intervals in the longitudinal direction are detachably held on the lower side of the upper table 19. A hydraulic cylinder 23 as a lift actuator for raising and lowering the upper table 19 is provided above each side plate 9. Further, an electric motor (not shown) may be used as the elevation actuator instead of the hydraulic cylinder 23.

Between the upper table 19 and the lower table 15, a plurality of processing stations S for performing the step-by-step processing are formed by the plurality of upper metal molds 3 and the plurality of lower metal molds 5. Further, a reverse stroke stopper 25 for positioning the workpiece W in the depth direction (front-rear direction) with respect to the lower die 5 at each processing station S is provided on the back surface side of the lower table 15. The reverse stroke stopper 25 has a collision member 27 capable of colliding the end face of the workpiece W, and the collision member 27 is adjustable in position in the depth direction.

The trigger 1 includes a movable foot switch device 29 for performing an up-and-down operation of the upper table 19 by a foot operation performed by the operator M. The foot switch device 29 according to the embodiment of the present invention has a specific configuration as follows.

As shown in fig. 3 to 5, a guide member 31 extending in the longitudinal direction (left-right direction) is provided at a lower portion of the lower table 15. The guide member 31 includes a guide main body portion 33 provided at a lower portion of the lower table 15, and a U-shaped guide rail portion 35 provided on a front surface (front surface) of the guide main body portion 33 and having an opened front side. Instead of providing the guide member 31 under the lower table 15, it may be provided to another member (not shown) such as a fixed frame disposed on the front side of the lower table 15.

The guide member 31 is provided with a slide member 37 movably in the longitudinal direction. The slide member 37 includes a guided portion 39 guided by the rail portion 35 of the rail 31 so as to be movable in the longitudinal direction, and a slide body portion 41 provided on the guided portion 39. The slide body portion 41 is configured to be adjustable in height with respect to the guided portion 39 by a plurality of adjustment bolts 43.

The slide member 37 is provided with a pedal case 45 swingably in the up-down direction by a plurality of hinges 47 as a hinge member. The pedal case 45 is moved in the longitudinal direction (left-right direction) together with the slide member 37 by manual operation (manual force) such as pressing by the foot Mf of the operator M. The pedal case 45 includes a support seat portion 49 provided to the guide member 37 via a plurality of hinges 47 so as to be swingable in the vertical direction, a pair of support wall portions 51 integrally erected on the upper surface of the support seat portion 49 and opposed to each other in the longitudinal direction, and a case body portion 53 provided between the pair of support wall portions 51 on the upper surface of the support seat portion 49 and having an open front surface side (front side). The pedal case 45 has a restricting portion (contact portion) 55 formed on the front side of the support seat portion 49 and contactable with the floor surface F. However, as described above, the slide body portion 41 is configured to be adjustable in height with respect to the guided portion 39, and the pedal case 45 is configured to be adjustable in height with respect to the guide member 31 (the lower table 15).

A lowering step plate 57 and a raising step plate 59 which can be operated by foot are provided in the case body portion 53 of the pedal case 45. The upper table 19 is lowered by controlling the driving of the pair of hydraulic cylinders 23 by the pedal operation of the lowering foot plate 57. The upper table 19 is raised by controlling the driving of the pair of hydraulic cylinders 23 by the pedal operation of the raising foot pedal 59. Further, when the upper table 19 reaches the bottom dead center, the raising operation of the upper table 19 may be automatically performed.

A movable bracket 61 is provided to each support wall 51 of the pedal case 45 so as to be movable in the vertical direction by a plurality of guide bolts 63 and a plurality of elongated holes 65. Each movable bracket 61 is provided with a caster 67 as a rotating body (rotating body) that rotates (rotates) in the longitudinal direction on the floor surface F. Each caster 67 receives the weight acting on the pedal case 45 (including the self weight of the pedal case 45, the self weight of the lowering footrest 57, and the self weight of the raising footrest 59). Instead of using the caster 67 as the rotating body, a roller (not shown) or a ball (not shown) other than the caster 67 may be used.

As shown in fig. 4 to 6(a) and (b), a cover 69 that covers the movable bracket 61 and the upper portion of the caster 67 is integrally provided on each support wall 51 of the pedal case 45. Further, a coil spring 71 as an urging member for urging the movable bracket 61, in other words, the caster 67 downward is provided in each cover 69 via a support bolt 73. When the foot switch device 29 depresses the lowering foot pedal 57 or the raising foot pedal 59, the casters 67 rise relative to the pedal case 45 against the biasing force of the coil springs 71, and the restricting portion (contact portion) 55 of the pedal case 45 comes into contact with the floor surface F. Instead of the coil spring 71, a spring (not shown) other than the coil spring 71 or an elastic member (not shown) such as a rubber member may be used as the urging member.

A column 75 that can be gripped by the operator M is provided upright on the upper surface of the case body 53 of the pedal case 45. The column 75 is a member for assisting the movement of the pedal case 45 in the longitudinal direction (left-right direction) by hand (manual force).

Next, the operation and effect of the embodiment of the present invention will be described.

When the step bending is performed in the plurality of processing stations S, the step bending is performed as follows.

The pedal case 45 is moved in the longitudinal direction (left-right direction) together with the slide member 37 by manual (manual) force such as pressing by the foot Mf of the operator M, and is positioned at a position corresponding to the first machining station (the machining station where the bending machining is first performed) S. Next, in the first machining station S, the end face of the workpiece W is caused to collide with the collision member 27, whereby the workpiece W is positioned in the depth direction (front-rear direction) with respect to the lower die 5. The upper table 19 is moved up and down by controlling the driving of the pair of hydraulic cylinders 23 by the pedal operation of the lowering pedal 57 and the raising pedal 59 (or only the lowering pedal 57). Thus, in the first processing station S, the first bending process can be performed on the workpiece W by the cooperation of the upper die 3 and the lower die 5.

After the first bending process is performed on the workpiece W, the pedal case 45 is manually (manually) moved in the longitudinal direction together with the slide member 37 based on the bending order of the workpiece W, and is positioned at a position corresponding to the next processing station (processing station for performing the next bending process). In the next machining station S, the end face of the workpiece W is caused to collide with the collision member 27, whereby the workpiece W is positioned in the depth direction with respect to the lower die 5.

The upper table 19 is lifted and lowered by controlling the driving of the pair of hydraulic cylinders 23 by the pedal operation of the lowering pedal 57 and the raising pedal 59 (or only the lowering pedal 57). Thus, in the next processing station S, the next bending process can be performed on the workpiece W by the cooperation of the upper die 3 and the lower die 5.

As described above, the pedal case 45 has the restricting portion 55 that can be brought into contact with the floor surface F by the plurality of hinges 47 swinging in the vertical direction on the slide member 37. The casters 67 provided on both sides (left and right sides) of the pedal case 45 in the longitudinal direction so as to be movable in the vertical direction are urged downward with respect to the pedal case 45 by coil springs 71. When the foot switch device 29 depresses the lowering foot pedal 57 or the raising foot pedal 59, the casters 67 are raised relative to the pedal case 45 against the biasing force of the coil springs 71, and the restricting portion 55 of the pedal case 45 comes into contact with the floor surface F. Thus, when the operator M depresses the lowering step plate 57 or the like, the pedal case 45 can be prevented from moving slightly in the longitudinal direction together with the slide member 37.

By adjusting the height of the pedal case 45 with respect to the guide member 31 in accordance with the height of the guide member 31 with respect to the floor surface F, the casters 67 are sufficiently grounded to the floor surface F, and the rotation state of the casters 67 can be stabilized when the pedal case 45 is moved in the longitudinal direction. Further, since the pedal case 45 is swung up and down on the slide member 37 by the plurality of hinges 47, even if there is an unintentional irregularity on the floor surface F, the irregularity can be absorbed by the swing of the pedal case 45 when the pedal case 45 is moved in the longitudinal direction.

Since the upright 75 is provided upright on the upper surface of the case body 53 of the pedal case 45, the pedal case 45 can be moved in the longitudinal direction by pressing or pulling the pedal case 45 while holding the upright 75 in addition to pressing by the foot Mf of the operator M. Therefore, according to the embodiment of the present invention, as described above, when the operator M depresses the lowering pedal plate 57 or the like, the pedal case 45 can be prevented from slightly moving in the longitudinal direction together with the slide member 37. Therefore, according to the embodiment of the present invention, the workpiece W can be bent in a stable posture without losing balance when the operator M steps on the lowering foot pedal 57 or the like, and the machining accuracy of the bending can be stably maintained.

Further, according to the embodiment of the present invention, even if there are unexpected irregularities on the floor surface F as described above, when the pedal case 45 is moved in the longitudinal direction, the irregularities can be absorbed by the swinging of the pedal case 45 in a state where the operating state of each caster 67 is stabilized. Therefore, according to the embodiment of the present invention, the pedal case 45 can be smoothly moved in the longitudinal direction, and the operability of the foot switch device 29 can be improved. In particular, since the pedal case 45 can be moved in the longitudinal direction by pressing or pulling the column 75, the operability of the foot switch device 29 can be further improved.

The present invention is not limited to the above-described embodiments, and various modifications and various embodiments can be implemented. The scope of the present invention is not limited to the above embodiments.

Claims

1. A bending machine for bending a plate-like workpiece by cooperation of an upper die and a lower die, the bending machine being characterized in that,

the disclosed device is provided with:

a lower table disposed at the lower part of the main frame and holding the lower metal mold at the upper side;

an upper table which is provided at an upper portion of the main body frame in a liftable manner and holds the upper metal mold at a lower side; and

a movable foot switch device for lifting the upper working table through foot operation,

the foot switch device includes:

a guide member provided on another member and extending in a longitudinal direction, the other member being disposed at a lower portion of the lower table or on a front surface side of the lower table;

a sliding member provided to the guide member so as to be movable in a longitudinal direction;

a pedal case which is provided to the slide member so as to be swingable in the vertical direction, has a restricting portion contactable with the floor surface, and is manually moved in the longitudinal direction together with the slide member;

a pedal plate which is arranged in the pedal shell and can be operated by foot;

a rotating body which is respectively arranged at both sides of the pedal shell in the length direction in a manner of moving in the up and down direction and rotates along the length direction on the ground; and

and an urging member that urges each of the rolling bodies downward with respect to the pedal housing.

2. The trigger of claim 1,

the foot switch device is configured such that when the foot pedal is depressed, each of the rolling bodies is relatively raised with respect to the pedal housing against the urging force of the urging member, and the restricting portion of the pedal housing is in contact with the ground.

3. The trigger according to claim 1 or 2,

the pedal housing is configured to be adjustable in height with respect to the guide member.

4. The trigger according to claim 1 or 2,

the foot switch device has a column that is provided upright on the pedal case and that can be held by an operator.