JPS5849138Y2 - Travel adjustment device for blanking/bolster reciprocating equipment - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device for adjusting the amount of movement in a bolster reciprocating device that feeds a mold in a blanking device in a zigzag manner.

Generally, the blanking device is driven to follow the slide of the press body, and most of them are designed to punch blanks in a staggered manner from a coiled blank material, and while the blanking slide is rising, the blanking device is driven to follow the slide of the press body. The upper die is moved, and while the die is moving, the coil is moved forward to punch out the coil so that the punching pattern is zigzag-shaped.

The coil material is conveyed while the mold is moving, and the coil material is supplied into the press mold by following the vertical movement of the press slide.

However, in the conventional device of this kind, it is necessary to change the amount of mold movement depending on the diameter of the blank, and the structure of the adjustment device is complicated, making the adjustment operation troublesome.

This invention was made in view of the above circumstances, and the object is to provide a device with a simple structure that can easily and quickly adjust the amount of reciprocating movement of the blanking bolster and steplessly adjust it.

Hereinafter, embodiments of this invention will be described in detail with reference to the drawings.

1 is a blanking bolster, which is placed on an underframe 2 placed directly below a blanking slide (not shown);
It is capable of reciprocating in a direction perpendicular to the coil material feeding direction (direction indicated by arrow A in FIG. 1), and a blanking mold 3 is attached thereon in a replaceable manner.

4 and 5 are the first and second links that constitute the four-bar chain rocking mechanism;
6 is a connecting rod attached to the swinging ends 4A and 5A of the link 4.5, 7 is a swing center shaft to which the lower end of the first link 4 is wedged, and 8 is a swinging center shaft to which the lower end of the second link 5 is wedged. Both shafts 7 and 8 are horizontally suspended in the underframe 2 so as to be rotatable around the center axis of swing.

Reference numeral 9 denotes a drive lever wedged on the swing center shaft I, and a cam follower 10 is rotatably attached to the upper end of the lever 9 via a shaft 11.

Reference numeral 12 denotes a drive cam, which is wedged around a cam shaft 13 that is rotatably supported horizontally on the underframe 2, and the cam follower 10 is in contact with the cam shaft 13.

Reference numeral 14 denotes a swinging lever wedged on the swinging center shaft 8, the swinging end 14A protrudes above the underframe 2, and the bracket 15Vc is connected to the connecting rod 16 and the pin 1, which is protruded from the side of the bolster 1.
7 and 18.

Reference numeral 19 denotes a cam follower restraining air cylinder, which is attached to the side of the underframe 2 on the outside of the second link 5 so as to be swingable by a horizontal shaft 20, and the outer end 21A of the piston rod 21 is connected to the metal fitting 22. It is rotatably attached to the second link 5 via a pin 23.

24 is a connecting pin 26 which is rotatably attached to the swinging end 5A of the second link 5 to one end of the connecting rod 6 via a metal fitting 25;
is a connecting hardware attached to the other end of the connecting rod 6.

The detailed structure of the connection between the connecting rod 6 and the first link 4 is as follows.
As shown in FIG. 3 and FIG. 3, a long hole 27 is provided in the swinging end 4A of the first link 4 in a longitudinal direction so as to be able to slide along this long hole 27. This 128 is fitted.

A shaft portion 29 is protruded from both ends of the shaft 128, and a screw hole 30 is provided in the vertical direction in the center of the shaft portion 29.
It is screwed onto a screw shaft 31 rotatably attached to the elongated hole 27 of the link 4 in parallel thereto, so that it can move up and down as the screw shaft 31 rotates.

The lower end 31A of the screw shaft 31 is supported by the first link 4 via a ball bearing 32, and the upper end 31B is fixed to the upper end surface of the first link 4 via a thrust bearing 33, 34 by a bolt 35. It is supported by a bearing metal fitting 36, and a driven gear 3T is wedged on the upper end 31CK.

A main gear 38 meshed with the driven gear 37 is wedged onto an output shaft 40 of a geared motor 39 with a brake.

The motor 39 is fixed with bolts 43 to a motor mounting base plate 42 fixed to the outer surface of the upper end portion 4A of the first link with bolts 41, and can be swung together with the first link 4.

Reference numeral 44 denotes an adjustment gear, which is rotatably fitted to the shaft portions 29 at both ends of the shaft portion 128 via bearings 45, and a locking nut 46 is screwed into a threaded portion 29AK provided at the end of the shaft portion.

The boss portion 48 of the adjustment gear 44 is opposed and protrudes inward, and the outer peripheral surface 48A of the boss portion is eccentrically formed with respect to the shaft hole 47, that is, the center of the gear.

The gear boss portion 48 is rotatably fitted into a gear fitting hole 48 provided in the fork portion 26A of the connecting hardware 26 via a bush 50.

A rack 51 is mounted on the opposite side of the motor mounting plate 42 from the motor 39 in parallel with the screw shaft 31 so as to mesh with the adjustment gears 44, respectively.

The pitch diameter of the adjustment gear 44, the outer diameter of the module, the boss portion 48, the eccentricity with respect to the shaft hole 47, etc. are determined so that the center of the adjusting shaft portion 29 reaches the maximum amount of movement of the bolster 1 in FIG. While moving linearly from point X1 giving the minimum amount of movement to point X2 giving the minimum amount of movement, the adjustment gear 44 rotates 180 degrees.The center of the eccentric point boss outer circumferential surface 48A at this time is between Yl and Yl and the cycloid curve C designed to depict.

In other words, as shown in FIG. 1, when the links 4 and 5 are stationary at the positions shown in the figure and the connecting rod 6 is swung vertically around the connecting pin 24, the trajectory in which point A moves from Yl to Yl is shown. The center (eccentric point) of the outer circumferential surface 48A of the boss portion is designed to move along a curve that is approximate to the curve.

Note that 52 is an oil hole.

Next, the operation for adjusting the amount of bolster movement in this invention will be explained.

First, when changing the movement amount S of the bolster 1, link 4
What is necessary is to move the upper fulcrum, that is, the position of the shaft portion 29.

Therefore, in FIG. 3, the top 28 is located at the position X1 where the amount of movement S of the bolster 1 is maximum, so it is moved to the lower position X2.
When moving to the minimum amount, first switch the air in the cam restraint air cylinder 19, release the pressing force of the cam follower 10 against the cam 12, and then
When the motor 39 is operated to rotate the screw shaft 31 after making sure that no unnecessary load is applied to the link 4, the top 28 is guided by the long hole 27 of the link 4 and descends (in the direction of the arrow in the figure). The center of the shaft portion 29 moves linearly from point X1 to point X2 in FIG.

At this time, as the gear 128 descends, the adjustment gear 44 fitted on the shaft portion 29 is rolled by the rack 51.
The center point Y1 of the outer circumferential surface 48A of the boss portion moves on the curve C and reaches Yl.

In this way, the first link 4 and the second link 5 are not moved, and the amount of displacement (arc-shaped movement amount) of the end of the connecting rod 6 with respect to the first link 4 is determined by the amount of eccentricity of the outer circumferential surface 48A of the boss portion of the adjustment gear 44. is absorbed, and the shaft portion 29 is moved linearly.

Therefore, since the movement start point of the bolster 1, that is, the zigzag start point, does not change, there is no need to adjust the zigzag start point.

In addition, when moving the shaft portion 29 from Xl to Xl, the motor 39 may be rotated in the opposite direction to the above, and the start/stop control of the motor 39 is performed according to the amount of adjustment of the amount of movement S of the bolster 1. done automatically.

As mentioned above, this idea is based on the blanking bolster 1
In a device in which the reciprocating movement is performed by a four-bar chain rocking mechanism, the first link 4 and the connecting rod 6 are fitted into an elongated hole 27 formed longitudinally in the upper part of the first link 4 in a penetrating manner. The spindle 128 is screwed into a screw shaft 31 provided parallel to the elongated hole 27, and is rotatably attached to the shaft portions 29 protruding from both ends of the top 28, and the outer circumferential surface of the boss portion 48 is aligned with the center of the gear. An adjustment gear 44 formed eccentrically with respect to the shaft hole 47 is connected to the adjustment gear boss 48 via a connecting metal fitting 26 rotatably fitted, and the gear 44 is connected to the first
The link 4 is engaged with a rack 51 fixed in parallel to the screw shaft 31, and the screw shaft 31 is configured to be rotated by a motor 39, so simply by starting and stopping the motor 39, the bolster 1 can be moved. The amount, that is, the amount of movement of the blanking mold 3 can be adjusted steplessly,
Moreover, the first link 4 and the second link 5 are not moved when adjusting the amount of movement, and the arcuate movement of the end of the connecting rod 6 is absorbed by the eccentricity of the adjusting gear boss portion 48.
The top 28 is moved linearly, so there is no need to adjust the position of the movement start point (zigzag movement start point) of the bolster 1, the structure is simple, the operation can be performed smoothly and reliably, and the adjustment is easy. This greatly contributes to improving work efficiency by reducing time.

[Brief explanation of drawings]

The drawings show an embodiment of this invention; Fig. 1 is a partially vertical front view, Fig. 2 is a cross-sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is a cross-sectional view taken along the line -■ in Fig. 2. It is a vertical cross-sectional view taken along the line -■. 1... Bolster, 2... Underframe, 3...
...Blanking mold, 4...First link, 5...Second link, 6...Connecting rod,
7.8...Rotating center shaft, 12...Cam, 14...Lever, 26...Connecting hardware, 27...Length Hole, 28...this 1.29
...Shaft part, 31...Screw shaft, 39...
... Drive motor, 44 ... Adjustment gear, 4
7...Shaft hole, 48...Adjustment gear boss section, 51...Rack.

Claims (1)

[Scope of utility model registration request] On the underframe 2 placed directly below the blanking slide,
A bolster 1 is provided on which a blanking mold 3 is mounted and is movable back and forth in a direction perpendicular to the coil feeding direction. The swing end of the lever 14 fixed to the second link 5 or the link swing center shaft 8 is connected to the bolster 1, and the swing center shaft 7 of the first link 4 is driven via a cam or the like 12. When the ranking/bolster reciprocating device is pressed, the first link 4 and the connecting rod 6 are inserted into an elongated hole 27 formed in the upper part of the first link 4 in the longitudinal direction and parallel to the elongated hole 27. The top 28 is screwed into the screw shaft 31 provided, and the boss 48 is rotatably attached to the shaft portions 29 protruding from both ends of the screw shaft 31, and the outer peripheral surface of the boss portion 48 is eccentric with respect to the gear center shaft hole 47. The formed adjustment gear 44 and the connecting hardware 26 rotatably fitted to the adjustment gear boss portion 48
The gear 44 is meshed with a rack 51 fixed to the first link 4 parallel to the screw shaft 31,
The screw shaft 31 is a movement amount adjusting device in a blanking/bolster reciprocating device configured to be rotated by a drive motor 39.