JPH10128596A - Slide drive device for press using link - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simultaneously change a slide length and a bottom dead center of a slide during operation by arranging a triangle link, which is connected to a first support point pin and is supported rotatably to a frame, and fixing a plunger guided with the frame to the slide of a press. SOLUTION: A right first link 21 is connected to an upper end part of a triangle link 22 with a second pin 32. A center part of the triangle link 22 is held rotatably with a first support point pin 33 arranged to a frame 1. A lower end part of the triangle link 22 is connected to one end part of a third link 23 with a fourth pin 34. The other end part of link 23 is connected to a plunger 6 with a fifth pin 35. Under this state, by using a crank shaped link and constructing a support point of the link adjustable, a distance between left/right plungers is made smaller, a slide length and a bottom dead center of the slide can be simultaneously changed during operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press slide drive device using a link.

[0002]

2. Description of the Related Art There are many applications relating to a device for driving a slide of a press using a bell-crank link. Among them, Japanese Utility Model Laid-Open No. 3-81294 is an example in which the number of links is relatively small and the whole apparatus is compact.

In the above-described conventional example, a pair of left and right bell crank-shaped links are configured to move up and down a slide of a press by oscillating movement about a hinge portion, so that a pair of guide rods ( The distance between so-called plungers can be reduced.

However, in the case of the above-mentioned conventional example, the fulcrum and the link for supporting the triangular link constituting the bell crank are arranged at the upper part, so that the device becomes slightly larger. The above-mentioned prior art does not disclose a device for changing the slide stroke length or a device for changing the die height.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a press slide driving device using a link used for high-speed and precise press working, in which a pair of guide rods (so-called plungers) fixed to a slide is provided. The object of the present invention is to provide a device which can reduce the distance between the links, make the arrangement of the links compact, and further include a device for changing the slide stroke length and a device for changing the die height. Therefore, the present invention can be said to be an improved invention of the above-mentioned prior art.

[0006]

According to the present invention, a bell crank-shaped link or a link in place of the bell crank is used, and the fulcrum of these links is adjusted in position.

[0007]

The distance between guide rods (so-called plungers) can be reduced, the stroke length of the slide and the position of the bottom dead center of the slide can be changed at the same time during operation, and a dynamic balance of the slide can be achieved.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1 showing a first embodiment,
A bolster 2 is fixed to a frame 1 of the press, and a slide 3 is provided so as to be able to move up and down. An upper die and a lower die are set on the slide 3 and the bolster 2, respectively, and press working is performed.

A slide guide rod 5 is fixed to the slide 3, and the slide guide rod 5 is fitted to a slide guide post 4 fixed to the frame 1.

A plunger 6 is fixed to the slide 3,
The plunger 6 is fitted to a plunger guide 7 fixed to the frame 1.

A crank shaft 12 is rotatably provided on the frame 1, and an eccentric portion of the crank shaft 12 is connected to a large end of a connecting rod 13.

At the small end of the connecting rod 13, together with the slider 14, the first right link 21 and the first left link 21 'are provided.
Are connected by a first pin 31.

The slider 14 is vertically movably guided by a groove provided in the frame 1 above the crankshaft 12.

When the crankshaft 12 rotates, the connecting rod 13 swings and the slider 14 moves up and down.

Since the apparatus shown in FIG. 1 is symmetrical, the structure of the right half will be described below.

The first right link 21 is connected to the upper end (first corner f) of the triangular link 22 by a second pin 32. A central portion (second corner s) of the triangular link 22 is rotatably held on the frame 1 by a first fulcrum pin 33 provided on the frame 1.

The lower end of the triangular link 22 (third corner t)
Is connected to one end of the third link 23 by a fourth pin 34. The other end of the third link 23 is connected to the plunger 6 by a fifth pin 35.

FIG. 2 shows a second embodiment. In the second embodiment,
This embodiment is obtained by adding a so-called dynamic balancer to the first embodiment. One end of the fourth link 24 is connected to the third link 23.
The fifth pin 35 together with the other end of the plunger 6
, And the other end of the fourth link 24 is connected to one end of the fifth link 25 by a sixth pin 36. Frame 1
, A balance weight guide rod 42 is fixedly mounted, and is fitted to a guide member 43 fixedly mounted on the balance weight 40.

The upper portion of the balance weight 40 is connected to the other end of the fifth link 25. Other than these configurations, the configuration is the same as that of the first embodiment.

When the crankshaft 12 rotates, the slide 3 moves up and down through each of the links, and the balance weight 40 moves up and down while swinging.

FIG. 3 showing the third embodiment is obtained by adding a device for changing the stroke length of the slide 3 and changing the die height to the structure of FIG. Therefore, the link mechanism of FIG. 3 is partially different from the link mechanism of FIG.

FIG. 3 also has a symmetrical structure, so that only the right half will be described. A crankshaft 12 is rotatably provided, and a large end of the connecting rod 13 is connected to the crankshaft 12. At the small end of the connecting rod 13, the slider 14 and one end of the left and right first links 21 ', 21 are attached to the first end.
They are connected by pins 31.

The other end of the right first link 21 is connected to a first corner, which is the upper end of the triangular link 22, by a second pin 32.

A worm 8 is rotatably provided on the frame 1, and a worm wheel 9 meshing with the worm 8 is rotatably held by a cap 10.

A screw rod 11 is fixed to the worm wheel 9.

The second slider 15 is movable in the left-right direction by a groove provided in the frame 1. The screw rod 11 is screwed into the second slider 15.

The second portion, which is substantially at the center of the triangular link 22,
The corner s is rotatably supported by a first fulcrum pin 33 provided on the second slider 15.

A third corner t, which is the lower end of the triangular link 22, is connected to one end of the third link 23 via a fourth pin 34.

The other end of the third link 23 is connected to the plunger 6 by a fifth pin 35 together with one end of the fifteenth link 45.

On the shelf of the frame 1 above the slide 3,
A bracket 16 is fixedly provided. This bracket 16
, One end of a fourteenth link 44 is connected by a second fulcrum pin 51.

The other end of the fourteenth link 44 is connected to a substantially central part of the fifteenth link 45 by a twelfth pin 52. The other end of the fifteenth link 45 is a balance weight 4
No. 0 is connected to the lower end by a thirteenth pin 53.

One end of the sixteenth link 46 is connected to the frame 1
Is connected to a third fulcrum pin 54 provided at the second position. First
The other end of the six link 46 is connected to an upper end of the balance weight 40 by a fifteenth pin 55.

In FIG. 3, when the crankshaft 12 rotates, the slide 3 moves up and down by the action of the link, and the balance weight 40 moves up and down while swinging. Since the balance weight 40 moves up and down in a direction opposite to that of the slide 3, the slide 3 can be dynamically balanced.

FIG. 5 shows a change in the stroke length and die height of the slide 3 when the first fulcrum pin 33 in FIG. 3 is moved. FIG. 5 is obtained by the drawing shown in FIG.

In FIG. 4, when the position of the first fulcrum pin 33 is changed to A1 to A4, the height of the top dead center of the slide 3 is P1 to P4, and the height of the bottom dead center is Q1 to Q4. .

Accordingly, the positions A1 to A of the first fulcrum pin 33
The die heights corresponding to No. 4 are Q1 to Q4, and the stroke lengths of the slide 3 are P1 to Q1 (the difference between P1 and Q1, the same applies hereinafter), P2 to Q2, P3 to Q3, and P4 to Q4.

Therefore, the adjustment amount (ADJ, A1 to A
FIG. 5 is obtained by taking 4) and taking Q1 to Q4 and P1 to P4 on the vertical axis. In FIG.
Assuming that P1 to P4 are polygonal lines p, q is the die height and pq is the stroke length.

FIG. 6 shows a fourth embodiment, and its structure is very similar to that of FIG. 3 showing the third embodiment. In FIG. 3, the fourth pin 34 connecting the triangular link 22 and the third link 23 is inside the plunger 6 (center side of the press), but in FIG. Outside. Except for this difference, FIGS. 3 and 6 are the same. That is, the arrangement of the other members does not change.

In the fourth embodiment shown in FIG. 6, a drawing was made to determine the die height and the stroke length of the slide when the first fulcrum pin 33 was displaced. FIG. 7 is a graph showing the results. Is shown in FIG.

In FIG. 7, the first fulcrum pin 33 is displaced to A11 to A14 by the worm mechanism and the screw mechanism. The top dead center at that time is P11 to P14, and the bottom dead center is Q
11 to Q14. Therefore, Q11 to Q14 become die heights, and P11-Q11 (difference between P11 and Q11,
The same applies hereinafter), P12-Q12, P13-Q13, P14
-Q14 is the stroke length.

FIG. 8 is a graph showing the result.
In FIG. 8, the horizontal axis indicates the amount of displacement of the first fulcrum pin 33, that is, the adjustment amount (ADJ), the vertical axis indicates the stroke length (stroke), the broken line p indicates the top dead center, and q indicates the bottom dead center. . Therefore, q indicates the die height, and pq indicates the stroke length for each adjustment amount.

[0042]

According to the present invention, a bell crank-shaped link or a link in place of the bell crank is used, and the fulcrum of the link can be adjusted in position, so that the distance between the left and right plungers can be reduced, and the slide stroke can be reduced. Length and
The bottom dead center position of the slide can be changed simultaneously while driving.

[Brief description of the drawings]

FIG. 1 is a front view in which a part of the first embodiment is sectioned (the right half shows a state of a top dead center and the left half shows a state of a bottom dead center)

FIG. 2 is a front view showing a part of the second embodiment in cross section (a right half shows a state of a top dead center and a left half shows a state of a bottom dead center);

FIG. 3 is a front view showing a cross section of a part of the third embodiment (a right half shows a top dead center and a left half shows a bottom dead center);

FIG. 4 is an explanatory diagram when a stroke length and an amount of change in die height are obtained by plotting in a third embodiment.

FIG. 5 is an explanatory diagram showing a change in stroke length and die height in a third embodiment.

FIG. 6 is a front view showing a part of the fourth embodiment in cross section (a right half shows a state of a top dead center and a left half shows a state of a bottom dead center);

FIG. 7 is an explanatory diagram when a stroke length and an amount of change in die height are obtained by plotting in a fourth embodiment.

FIG. 8 is an explanatory diagram showing a change in stroke length and die height in a fourth embodiment.

[Explanation of symbols]

1 is a frame, 2 is a bolster, 3 is a slide, 4 is a slide guide post, 5 is a slide guide rod, 6 is a plunger, 7 is a plunger guide, 8 is a worm, 9 is a worm wheel, 10 is a cap, and 11 is a screw rod. , 1
2 is a crankshaft, 13 is a connecting rod, 14 is a first slider, 15 is a second slider, 21 is a right first link, 2
1 'is the first link on the left, 22 is the triangle link, and 23 is the third link
Link, 24 is a fourth link, 25 is a fifth link, 31 is a first pin, 32 is a second pin, 33 is a first fulcrum pin, 34
Is a fourth pin, 35 is a fifth pin, 36 is a sixth pin, 37 is a seventh pin, 40 is a balance weight, 42 is a balance weight guide rod, 43 is a guide member, and 44 is a fourteenth pin.
Link, 45 is the 15th link, 46 is the 16th link, 5
1 is a second fulcrum pin, 52 is a twelfth pin, 53 is a thirteenth pin, 54 is a third fulcrum pin, and 55 is a fifteenth pin.

Claims (3)

[Claims] A crankshaft (12) rotatably provided on a frame (1) of a press, and the crankshaft (12).
A connecting rod (13) having a large end connected to
A first slider (14) guided vertically movable by a groove provided in the frame (1) above the crankshaft (12), and the first slider (14) at a small end of the connecting rod (13). A pair of left and right first links (21 ') (21), one end of which is connected with the slider (14);
The first corner (f) is connected to the other end of the right first link (21), and the second corner (s) is connected to a first fulcrum pin (33) provided on the frame (1). ) Are connected and rotatably supported by a triangular link (22);
A third link (23) having one end connected to a third corner (t) of the triangular link; and a press slide (3).
And a plunger (6) guided by the frame (1). The plunger (6) is connected to the other end of the third link (23). A slide drive device for a press using a link, characterized in that a link mechanism for driving the link is disposed symmetrically. 2. A fourth link having one end connected to a connection point between the other end of the third link and the plunger, and a second link connected to the other end of the fourth link. A fifth link 25 whose one end is connected by a sixth pin 36.
And a balance weight guide rod 42 fixedly mounted on the frame 1, and the balance weight guide rod 4
2 and the upper end thereof is connected to the fifth link 2
5 has a balance weight 40 connected to a seventh pin 37 at the other end thereof, and the link member or the like for swinging the balance weight 40 is symmetrically provided. Press drive slide drive. 3. A crankshaft (12) rotatably provided on a frame (1) of a press, and the crankshaft (12).
A connecting rod (13) having a large end connected to
A first slider (14) guided vertically movable by a groove provided in the frame (1) above the crankshaft (12), and the first slider (14) at a small end of the connecting rod (13). A pair of left and right first links (21 ') (21), one end of which is connected with the slider (14);
The first corner (f) is connected to the other end of the right first link (21) and the second corner is attached to a first fulcrum pin (33) provided on the second slider (15). (S) connected and rotatably supported triangular link (22);
A third link (23) having one end connected to a third corner (t) of the triangular link; and a press slide (3).
And the plunger (6) guided by the frame (1). The plunger (6) is connected to the other end of the third link (23). 15) A slide driving device for a press using a link, wherein the position of the frame (1) can be adjusted on the frame (1), and a link mechanism for driving the slide (3) is provided symmetrically.