JP2002011534A - Position switching mechanism of material feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a position switching mechanism of a material feeder in which the mechanical material feeder provided in a body frame of a press can be moved outside the body frame in a short time, and checked and operated when the feeder is adjusted in an external space under the same condition as that when the feeder is in a regular operation. SOLUTION: This position switching mechanism of the material feeder comprises the mechanical material feeder which is connected to a prime mover of the main press via a mechanical means and synchronously driven, a movement guiding means for free guide between the material feed position in the press and the position retracted outside the press, a positioning means capable of fixing a material at the two positions, respectively, and a spline transmission mechanism for transmitting the synchronous rotation even after the material is moved to the retraction position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a press body of a transfer press and a material feeding device. More specifically, the mechanical material feeder attached to the press machine can be easily moved and fixed to two positions, a material supply position and a retreat position. This is to secure a space for adjusting the device.

[0002]

2. Description of the Related Art In a conventional transfer press,
A material supply device is fixedly provided on the press machine at the front or rear side of the press machine, and the strip is sent to the material supply device and intermittently fed to a die set of the press machine. As a method of intermittently feeding the material, there are a mechanical material feeder and a numerically controlled material feeder. The mechanical material feeder includes a gripper system, a roll system, and the like. FIG. 6 shows a case where the supply device is provided on the front side of the press machine. In FIG. 6, the machine frame 20 provided with the die set 214 is provided.
2 is screwed onto the base 201 of the machine,
A material supply device 203 is attached to the front side of the device 01. Usually, the workability in adjusting the mold is deteriorated, so
3 is often attached to the rear side, but may be attached to the front side when it is desired to bring the material supply device 203 closer to the die set 214. In addition, even when the material supply device 203 is attached to the rear side, the material supply device 203 may be attached to the inside of the press machine in order to approach the die set 214.

[0003] Among the mechanical material feeders, the gripper type material feeder intermittently feeds the material to be supplied intermittently in synchronization with the operation of the press. During the feeding and pressing processes, the strip is firmly clamped by a clamp member. Among the mechanical material feeding devices, a roll material feeding device is configured to sandwich a band material between a pair of rollers and mechanically control the rotation amount of the rollers. The gripper type material feeder
In order to securely grip with the grip member and accurately feed the strip,
Also, in order to prevent the plate material from shifting due to the force pulled by the band material during the pressing process by clamping strongly with the clamp member, the gripper pressure due to the grip member due to changes in the material, width and thickness of the band material and differences between lots. Therefore, it is necessary to adjust the clamping pressure by the clamping member. Further, it is necessary to adjust the timing at which the grip member grips, feeds, and releases the band, and the timing at which the clamp member clamps or releases the band. In addition, it is necessary to adjust the swing timing although the frequency is low.

Further, in order to incorporate the device into a press machine frame, it is necessary to reduce the overall configuration. By explaining the configuration of such a mechanical material feeding device known in the prior art, the location of the adjustment point of the device and the obstacles around the device in order to increase the accuracy of the operation check after the adjustment are described. It is understood that it is necessary to have nothing. Therefore, a configuration of a general mechanical feeder having many adjustment points will be described with reference to FIGS.

FIG. 7 shows a mechanical material feeder, which includes a grip portion 101 and a clamp portion 10 for gripping a processing strip W.
2 is a cross-sectional view showing the arrangement of a feed base unit 103 and a swing unit 104 and a swing unit driving member 105. FIG. In FIG. 7, in the process of passing through the rocking body 111 from the right side in the drawing, the strip W is positioned for feeding and rocking, and moves to the processing site.

In FIG. 7, a feed base 112 is slidably supported by a pair of slide bearings fitted on a pair of support shafts 113A and 113B, and is driven by a first shaft 115.
A first cam 116 divided and manufactured easily according to the feed amount of the strip W is keyed to the first shaft 115, and the first cam 1
A pair of cam followers 117A, 117A, which contact the cam surface of the cam 16 and limit the stroke of the slide 112 in the sliding direction.
117B is provided on the lower surface of the feed base 112. The cam surface of the first cam 116 is constantly pressed in the traveling direction of the strip by a pair of springs 118A and 118B fitted on a pair of support shafts 113A and 113B, respectively.
Is in contact with The first shaft 115 is rotatably driven by a pulley 164 provided at an opposite shaft end to which the first cam 116 is fitted.

In FIG. 7, a clamp table 145 of the clamp section 102 is fixed to an oscillating body. A clamp plate 146 for pressing and holding the supply strip W from below on the lower surface of the clamp table 145 is pressed against the clamp table 145 by a pressing pin 149 urged by a spring. The operation of clamping and unclamping is given by the vertical movement of the cam follower 148 provided at the lower end of the clamp plate 146 in contact with the cam surface of the third cam 144 attached to the second shaft 120. The third cam 144 is integrated with the second cam 143 to form a second
The shaft 120 is fixed to an end flange surface.

In FIG. 7, a swinging portion driving member 105 includes a gear box 136, a sleeve 152 supported on a support 151 projecting upward, and a swinging body 111 integrally formed with the sleeve swinging within a predetermined range. It is provided freely. The swing of the swing body 111 and the sleeve 152 is caused by the cam follower 160 attached to the lever 159 fixed to the end of the sleeve.
Is brought into contact with the cam surface of the fourth cam 161 fixed concentrically with the gear 158, so that the fourth cam 161 makes one rotation with respect to one rotation of the second shaft 120.

FIG. 8 shows a grip portion for gripping the strip W shown in FIG. In FIG. 8, a band material can be freely held between a grip base 121 of a grip member and a grip plate 128. The grip table 121 is moved by a spring 122 to a feed table 112.
It is constantly pressed up. When starting to pass the material, the grip stand 121 is raised. For that, lever 1
By rotating the lever 26, the protrusion of the boss of the lever 126 is separated from the groove of the grooved plate 124 and pulled up by the bolt 127 screwed in the central portion of the grip stand 121, so that a gap can be formed between the lever 127 and the feed stand 112. The pressable spring 122 is provided in contact with the upper surface of the grip stand 121 and the lower surface of the flange of the collar with flange 123.

The vertical movement of the grip plate 128 is performed by rollers 133A and 133B provided on one lever body 132. The slide shafts 129A and 129B with flanges are the feed base 1
12 are supported by bearings 131A and 131B, and flanged slide shafts 129A and 129B are always in contact with rollers 133A and 133B supported by a swinging lever body 132.
Spring 119 on each of the shafts so as to press the flange of
A, 119B are fitted and energized.

The operation of grip and ungrip is such that a cam follower 134 provided on a lever body 132 having one end supported on a rocking body 111 is mounted on and driven by a second shaft 120 supported by the outer diameter of the first shaft 115. The rollers 133A and 133B are driven upward by contacting the upper surface of the second cam 143, and the grip plate 128 is moved upward so as to contact the lower surface of the grip base 121 to clamp the band material from the lower surface.

[0012]

In a mechanical material feeder of a transfer press, conventionally, the material feeder is fixedly attached to a press body at a front side or a rear side of the press machine. However, if it is fixed to the front of the machine, there is a problem that it hinders the adjustment of the mold, and it is difficult to adjust the material feeder because the material is supplied close to the mold of the machine. .

Further, since the press working position is usually located on the front side of the press machine, if the material feeder is fixed to the rear side of the press machine, the press work position must be adjusted in order to feed the material accurately and stably. The distance between the material feeders must be as short as possible, and the material feeders are located as close as possible to the die of the press machine. Therefore, the material feeder is inside the press machine and has no space for adjustment, and it is very difficult to adjust the gripper pressure, the clamp pressure, and the timing of the material feeder in that situation. Had to be taken out and adjusted once.

Further, when adjusting the material supply device, it is necessary to check the feed of the material in an operating state. However, performing adjustment by synchronous operation with the press main machine in a state of being mounted on the press main machine requires space. There was a very difficult problem. In the case of a mechanical material feeder, the power of the press body is mechanically transmitted to the input shaft of the material feeder via mechanical power transmission means such as a gear, a crank mechanism, a belt, and a chain. Therefore, once the device is taken out,
The problem that the mechanical connection is broken and synchronous rotation from the press machine cannot be obtained, so that adjustment by synchronous operation with the press machine of the mechanical material feeder is impossible outside,
In addition, there is a problem that the timing is shifted by cutting the edge of the press machine with the transmission mechanism, and the readjustment must be performed.

The present invention has been made to solve the above-mentioned problem, and it is intended that the material feeder is not obstructed at the time of adjusting the mold, and the material feeder is operated synchronously at a place where the workability is good. The purpose is to be able to do it.

[0016]

According to a first aspect of the present invention, there is provided a material feeder position switching mechanism for moving a band material at a material supply position in synchronization with intermittent operation of press working. A mechanism for switching an operating position of a mechanical material feeder that feeds a fixed amount to a press machine, comprising a movable body to which the mechanical material feeder is attached and movable, and a mechanical material feeder fixed to a press machine. Moving guide means for guiding the moving body so that the apparatus can be moved between a material supply position inside the press machine and a retracted position outside the press machine; and A positioning means for positioning and fixing at two positions of a position and the retracted position, and a mechanical feeder positioned at the material supply position or the retracted position via a spline transmission mechanism. Mechanical transmission means for transmitting the rotational power from the drive motor of the press machine, so that the mechanical material feeder operates synchronously with the press machine not only at the material supply position but also at the retracted position. Things.

Since the material feeding device slides along the guide rail of the moving guide means while being connected by the spline shaft mechanism, the timing of the rotating mechanism of the press machine, that is, the timing of punching of the transfer press does not shift. . For this reason, it is no longer necessary to readjust the timing by cutting the edge with the transmission mechanism of the press machine as in the related art, and to perform readjustment. Further, since the material feeding device can be retracted from the vicinity of the press working position of the present machine, the mold can be easily reached and fine adjustment on the machine can be facilitated. Also, there is no need to adjust the material feeder itself in a narrow space inside the machine, and by providing the retreat position completely outside the machine, the drive of the material feeder can be maintained while the drive system from the machine remains connected. It is possible to adjust the gripper pressure, the clamp pressure, the timing, and the like.
The movement between the material supply position and the retreat position of the material feeder can be manually performed, and the positioning is a plunger system in which the knob urged by a spring is advanced and retracted. Can be done quickly.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view of a mechanical material feeding device 3 provided in a main frame 2 of a press machine according to the present invention. The moving guide means 31, a moving body 9 guided by the moving guide means 31, and a moving body 9 shows the device 3 attached to the device 9 and a transmission mechanism 18 using gears and chains that branch and transmit the power from the drive motor 15 of the machine. FIG. 2 shows a mechanical material feeder 3 at a material supply position 32 in the machine frame 2 according to the present invention, and a retracted position 33 of the mechanical material feeder 3 outside the machine frame 2 indicated by a frame. FIG. 2 is a top view of the press machine 1 and is a cross-sectional view in which the machine frame 2 is broken. FIG.
FIG. 3 is a rear view of the press machine 2 in which the material feeding device 3 is positioned and fixed at the material feeding position 32 in the material feeding device position switching mechanism according to the present invention. The material feeding device 3 positioned and fixed at the retracted position is shown by a dashed line. The movement guide means 31 and the spline transmission mechanism 25 are also shown. FIG. 4 is an enlarged rear view of the material feeder position switching mechanism of the present invention shown in FIG. The rear view of the moving body 9 is included. FIG. 5 is a sectional view of the material feeder position switching mechanism according to the present invention, taken along the line AA in FIG.

In FIG. 1, a mechanical material feeder 3 mounted on a moving body 9 mounted on a moving guide means 31 mounted on a base 1 of the machine is provided with a material supply position 32 in the frame 2 of the machine. , Is positioned and fixed by the plunger 10. The strip W is supplied from the rear side of the press machine to the gripper mechanism 4 and the clamp mechanism 5 of the mechanical material feeder 3, and the strip W is cooperated by the gripper mechanism 4 and the clamp mechanism 5 driven by the cam mechanisms, respectively. To the die set 14 intermittently. The punching operation of the ram 23 of the press machine and the intermittent fixed-rate feeding operation of the mechanical material feeder 3 are synchronously driven by a branch transmission member 18 that branches and transmits the power from the drive motor 15. The power of the drive motor 15 of the press machine is transmitted to the crankshaft 16, the power of the crankshaft 16 is taken out to the branch shaft 17, and further to the spline transmission mechanism 25 via the gear 17 a via the branch transmission member 18. It is transmitted in synchronization with the input shaft 19 of the mechanical material feeder 3.

In FIG. 2, a moving body 9 to which a mechanical material feeder 3 is attached is guided by a pair of rails 7A and 7B attached to a rail base 6 provided on the base 1 of the machine. 9 comes into contact with the stopper 13A and the material supply position 32
Is positioned. The mechanical material feeder 3 is guided by the rails 7A and 7B, moves from the material supply position 32 to a retreat position 33 in a horizontal direction orthogonal to the supply direction of the strip W, and the moving body 9 contacts the stopper 13B. It is positioned in contact. The retreat position 33 is located on the machine base 1 but outside the machine frame 2, and when the mechanical material feeder 3 is moved to this position, the adjustment of the material feeder is performed in a space free of obstacles. This is possible while operating synchronously.

The movement guide means according to the present invention will be described with reference to FIGS. 3 and 4, the power rotation transmitted to the spline transmission mechanism 25 via the branch transmission member 18 is transmitted in synchronization with the input shaft 19 of the mechanical material feeder 3. The moving body 9 to which the mechanical material feeder 3 is attached is guided by a pair of rails 7A and 7B and can move to the two positions. Moving guide means 3 for guiding to the two positions
Reference numeral 1 denotes a rail base 6 attached to the rear wall 1a of the base of the machine, a pair of rails 7A and 7B attached to the rail base 6, and four slides 8 fitted to the rails. Moving body 9.

The moving guide means comprises the rails 7A, 7
Instead of using a rolling bearing such as B and the four slides 8, it is also possible to use a sliding surface that uses a sliding metal or uses no metal at all. If the frequency of moving to the retreat position 33 is low, there is no problem if a slight decrease in workability is allowed.

The positioning means 34 for positioning the moving body 9 at the two positions will be described with reference to FIG. The positioning means 34 is attached to a slide base 8A which is attached to the slide 8 and attaches the moving body 9, and moves together with the moving body 9. When the mechanical material feeder 3 is at the material supply position 32, the tip 11 of the plunger 10 is urged by a spring (not shown) to fit into the hole of the pin guide 12 </ b> A and move in the moving direction of the moving body 9. The moving body 9 is positioned and fixed. Further, the play of the moving body 9 in the moving direction is performed by the stopper 13A.
Can be set to 0 by adjusting. In addition, the play in the direction perpendicular to the moving direction of the moving body 9 is performed by the rails 7A and 7A.
B and slide 8.

In FIG. 4, the mechanical material feeder 3 is at the material supply position 32 where the moving body 9 hits the stopper 13A, and the rod of the tip of the plunger 10 is inserted into the hole of the pin guide 12A attached to the rail base 6. The tip 11 is inserted and positioned and fixed. At this position, it is difficult to adjust the gripper pressure and the clamping pressure of the mechanical material feeder 3 and the timing, etc. at this position. The movement of the mechanical material feeder 3 to the retreat position 33 is performed by pulling the plunger 10 in the axial direction, pulling out the rod tip 11 at the tip of the plunger 10 from the hole of the pin guide 12A, and connecting the moving body 9 and the rail base 6 to each other. After cutting the edge, the moving body 9 is manually moved along the rails 7A and 7B to the retreat position 33 where the stopper 13B is hit, while the plunger 10 is pulled in the axial direction. The rod 11 at the tip of the plunger 10 is inserted into the hole of the pin guide 12B to complete the positioning. The play in the moving direction can be made zero by adjusting the stopper 13B. As another positioning and fixing means, a rod tip 11 at the tip of the plunger 10 urged by a spring at the two positions described above.
In place of this, a screw is used at this tip and the pin guide 12
The moving body 9 can be fixed to the rail base 7 with a screw by using the hole A as a female screw.

FIGS. 3 and 4 show a configuration in which the power branched from the crankshaft 16 of the transfer press is transmitted to the mechanical material feeder 3 at the material supply position 32 or the retracted position 33. It will be explained based on the following.

In FIG. 3, the power of the crankshaft 16 which is driven at a reduced speed from the drive motor 15 is branched from a branch shaft 17 connected by a bevel gear and connected to a branch transmission member 18 connected thereto.
, And transmitted to the spline transmission mechanism 25 and further to the input shaft 19 of the mechanical material feeder 3. In this embodiment, a screw gear 2 is mounted on a shaft 20 orthogonal to the branch shaft 17.
The mechanical material feeder 3 is rotated by a mechanical element, for example, a timing belt, to which rotation is transmitted at 1, 2 and further synchronously transmitted.
The rotation is transmitted to the input shaft 19. Instead of these power transmission methods, a direct connection method using a bevel gear or a transmission method using a universal joint can be adopted.

In the present invention, in any of the two positions, it is necessary to rotate the input shaft 19 of the mechanical material feeder 3 in synchronization with the rotation of the crankshaft 16.
Mechanical material feeder 3 via spline transmission mechanism 25
Is intended to transmit power to the input shaft 19.

In FIG. 4, a housing 26 is attached to the machine base 1 in parallel with the branch shaft 20. A sleeve 27 is supported by a bearing inside the housing 26, and a pulley 28 is keyed around the outer periphery of the sleeve 27 near the shaft end on the side of the branch transmission member, while an end of the sleeve 27 on the mechanical material feeder 3 side. A spline nut 29A is fitted and attached inside. The crankshaft 16
Is transmitted to the sleeve 27 via the pulley 28, and further transmitted to the spline shaft 29 meshing with the spline nut 29A. The spline shaft 29 is connected to the input shaft 19 of the mechanical material feeder 3 by a coupling 30, and power is transmitted to the input shaft 19 of the mechanical material feeder 3 in synchronization with the crankshaft 16.

When the mechanical material feeder 3 is in the material supply position 32
The spline shaft 29 is fixed to the spline nut 29,
Since the shaft moves in and out in the axial direction while maintaining the engagement with A, the rotation of the input shaft 19 of the mechanical material feeder 3 synchronized with the crankshaft 16 is constantly obtained. Even when the axis of the pulley 28 and the axis of the input shaft 19 are offset, the mechanical material on the moving body 9 can be obtained by using a connecting member in which a universal joint is connected to both shaft ends of the spline mechanism. Transmission to the feed device 3 is possible.

Next, the operation of moving and positioning the mechanical material feeder 3 between the material supply position 32 and the retreat position 33 will be described.

A mechanical material feeder 3 is provided on the front side of the press machine.
If the mold is replaced, it is difficult to replace the mold. Especially when fine adjustment of the mold is required at the beginning of punching, if the operability is not good, the efficiency of the adjustment deteriorates. For this reason, the mechanical material feeder 3 is often provided at the rear side of the press machine, but the press die, especially the die set of the transfer press is installed near the front side of the press machine. 2 is often provided at the rear.
If it is installed in the rear part of the frame 2 of the machine, it is difficult to adjust the mold and work. Therefore, the mechanical material feeder 3 is temporarily removed from the frame 2 and adjusted. When the mechanical material feeder 3 is once removed from the frame 2 of the machine, the edge of power transmission is cut off, so that it is not possible to drive and adjust the mechanical material feeder 3 in synchronization with the crankshaft 16 of the press machine. It was possible.

In the present invention, the mechanical material feeder 3 is moved and positioned outside the machine frame 2 when the mold is adjusted or the mechanical material feeder is adjusted, and the mechanical material feeder 3 is pressed by a press book. It is configured to operate synchronously with the machine. Therefore, as shown in FIG. 5, the grip pressure adjustment unit 41, the clamp pressure adjustment unit 42, the feed amount timing adjustment unit 43, and the grip timing adjustment unit 4 of the mechanical material feeding device.
4. The external adjustment of the clamp timing adjustment unit 45 and the swing mechanism adjustment unit 46 is facilitated, and a quick return to the material supply position is possible after the adjustment is completed.

The movement from the material supply position 32 to the retreat position 33 is performed according to the following procedure. The strip W is cut between the clamp member and the die set. The plunger 10 is pulled, the rod tip 11 is pulled out of the hole, and is held with a fingertip, and the moving body 9 is manually moved in the direction of the retreat position 33 smoothly. When the moving body 9 comes into contact with the stopper 13B and stops, the rod end 11 of the plunger 10 is inserted into the hole of the pin guide 12B and the movement is completed. Since the entire apparatus is moved to the outside of the machine frame 2, it is easy to remove parts, adjust the timing of the cam, and adjust the load spring. Also, since the function check of the adjustment result can be performed under the same operating conditions as during the press operation, the actual operation can be performed immediately after returning to the material supply position after the check is completed.

[0035]

Since the material feeder position switching mechanism of the present invention is constructed as described above, the following effects can be obtained. By a manual operation, the material feeder can be moved in a short time from the material supply position in the operating state to the retreat position where the adjustment and the checking operation can be performed. It is possible to secure a work space for mold adjustment in front of the press machine, and a secure and secure adjustment of the material feeder and a check operation space. As a result, the adjustment and the confirmation operation of the plurality of dies of the material feeding device and the die set can be easily performed, and the efficiency and shortening of the adjustment work and the safety can be ensured.

[Brief description of the drawings]

FIG. 1 is a side view of a mechanical material feeding device provided in a main frame of a press machine according to the present invention, in which the device is attached to a moving body guided by a moving guide means, and the driving motor is used for the device. Up to the transmission mechanism.

FIG. 2 is a top view of the press machine showing a mechanical material feeder at a material supply position in the machine frame according to the present invention and a retracted position of the machine outside the machine frame, and the machine frame is partially broken. FIG.

FIG. 3 is a rear view of the press machine when the material feeder is positioned and fixed at a material supply position by the material feeder position switching mechanism according to the present invention. The material feeding device positioned and fixed at the retracted position is indicated by a dashed line. The movement guide means and the spline transmission mechanism are also shown.

FIG. 4 is an enlarged view of a rear view of the material feeder position switching mechanism of the present invention shown in FIG. 3; Including the rear view of the moving object.

FIG. 5 is a sectional view of the material feeder position switching mechanism according to the present invention, taken along the line AA in FIG. 4;

FIG. 6 is a top view in which a material feeding device is attached to the front side of the press main unit.

FIG. 7 is an explanatory diagram showing a configuration of a conventionally used mechanical material feeder.

FIG. 8 is an explanatory view of a grip shown in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 This machine base 2 This machine frame 3 Mechanical material feeder 4 Grip member 5 Clamp member 6 Rail base 7A, 7B rail 8 Slide 8A Slide base 9 Moving body 10 Plunger 11 Rod tip 12A, 12B Pin guide 13A, 13B Stopper 14 Die set 15 Drive motor 16 Crank shaft 17 Branch shaft 18 Branch transmission member 19 Input shaft 20 shaft 21, 22 Screw gear 23 Ram 25 Spline transmission mechanism 26 Housing 27 Sleeve 28 Pulley 29 Spline shaft 30 Coupling 31 Moving guide means 32 Material supply Position 33 Evacuation position 34 Positioning means 41 Grip pressure adjustment unit 42 Clamp pressure adjustment unit 43 Feed timing adjustment unit 44 Grip timing adjustment unit 45 Clamp timing adjustment unit 46 Swing timing adjustment unit W Strip

Claims (1)

[Claims] 1. A mechanism for switching an operation position of a mechanical material feeder for feeding a band material to a press machine at a material supply position by a fixed amount in synchronization with an intermittent operation of press working. A movable body that is attached to and movable on the press machine; and guides the movable body such that the mechanical material feeder is movable between a material supply position inside the press machine and a retracted position outside the press machine. Moving guide means, positioning means provided on the moving body for positioning and fixing the mechanical material feeding device at two positions of the material supply position and the retreat position, and positioning at the material supply position or the retreat position. Mechanical transmission means for transmitting rotational power from a drive motor of a press machine to the mechanical material feeder through a spline transmission mechanism. Position switching mechanism of the material feed apparatus being characterized in that as well to operate the press machine and synchronized at the retracted position not the material supply position only.