JPH11277300A - Press machine using toggle link mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a press machine with the use of a toggle link mechanism capable of removing a lateral direction component in driving a slide downward by a toggle link mechanism and conducting dynamic equilibrium of the slide as well as die height adjustment. SOLUTION: An oscillation link 6, which is connected to a toggle lower link 11, oscillates around an oscillation support point axis 9 and elevates a slide 2 while roughly keeping a slide drive link 4 in a vertical direction, is arranged, a link 24 connected to a support point pin 23 above the oscillation support point axis is connected to a dynamic balance weight 25 in parallel to the oscillation link 6, and by elevating the dynamic balance weight 25 in the direction opposite to elevation of the slide 2, the dynamic equilibrium of the slide 2 is conducted. A rod 8 arranged with the oscillation support point axis 9 and the support point pin 23 is freely elevated for a frame 7, thus the slide 2 is freely adjustable for its up/down position by the die height adjustment device 27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press machine using a toggle link mechanism, which eliminates a lateral force component of a slide driving force by a toggle link mechanism to obtain a dynamic balance of a slide and adjust a die height. It is effective when you want to make it possible.

[0002]

2. Description of the Related Art In a press machine that drives a slide up and down by using a toggle link mechanism, a lower end of a toggle lower link is directly connected to the slide, or is connected to an upper end of a plunger erected on the slide. For example,
Japanese Patent Application Laid-Open No. Hei 6-118224 discloses a structure in which the lower end of a toggle lower link is directly connected to a slide.
The lower end of the toggle lower link is connected to the upper end of a plunger erected on a slide.

[0003]

In a press machine using the above-described toggle link mechanism, when the toggle link mechanism bends and extends to drive the slide up and down, the lower toggle link falls down at a large angle with respect to the vertical direction and stands up. I do. Therefore, when the slide is pressed down and the falling angle is large, when the slide is driven downward, the horizontal component force is large, and if the toggle lower link is directly connected to the slide, the slide is immediately The force acts to reduce the accuracy of the press machine, and in the case where the lower toggle link is connected to the plunger, the clearance of the plunger is shifted. Even when two plungers are connected by a link by a two-point press, there is a drawback that the bias of the clearance is unavoidable and reduces the accuracy of the press machine.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, so that even if the lower link of the toggle link mechanism falls down, no lateral thrust force acts on the slide, and the slide is dynamically balanced and the die height is adjusted. An object of the present invention is to provide a press machine using a toggle link mechanism that is enabled.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a crankshaft that is rotationally driven and connected to a connecting rod by a connecting rod, and is vertically slidable on a frame above the crankshaft. In a press machine using a toggle link mechanism comprising a slider guided by a slide link, a connection link of the slider, and a center link connection pin of a toggle link mechanism for driving the slide up and down, a frame support pin A swing link, which is connected to an upper link having an upper end connected to the lower end of the lower link connected by a connecting pin, and has a second end extending substantially in the horizontal direction, connected to a swing fulcrum shaft of the frame; A slide drive link that connects the moving link and a point portion of the slide and is oriented substantially vertically is provided, and the arrangement of these members is left-right symmetric.

In a press machine utilizing the above-mentioned toggle link mechanism, the end of the swing link extending beyond the swing fulcrum axis and the fulcrum pin of the frame above the swing fulcrum axis are connected at one end to swing. A link extending outwardly in parallel with the link; and a dynamic balance weight which is provided by connecting both ends thereof in a vertical direction and dynamically balances the elevation of the slide portion.

In a press machine using the above-described toggle link mechanism, the press machine is connected to a swing fulcrum shaft of a swing link,
A rod is provided on the frame so as to be movable up and down, and a die height adjusting device is provided on the upper part of the frame and has a configuration in which the vertical position of the rod can be adjusted.

In a press machine for driving a slide up and down by a toggle link mechanism, a slider connected to an eccentric portion of a rotationally driven crankshaft by a connecting rod and guided slidably in a vertical direction by a frame above the crankshaft. In a press machine using a toggle link mechanism comprising a connection link connecting a connection shaft of the slider and a center link connection pin of a toggle link mechanism for driving the slide up and down, an upper end portion is connected to a support pin of a frame. A first swing link, which is connected to the lower end of the lower link connected by the upper link plate and the connecting pin, extends substantially in the horizontal direction, and has an intermediate portion connected to the swing fulcrum shaft, and a lower end portion to the slide point portion. A slide drive link connected in a substantially vertical direction, and one end connected to an upper end of the slide drive link; Substantially extending parallel to the link, and the second swing link connecting the other end to a vertical position adjustable die height adjustment device, the upper portion is connected to the lower end of the lower link,
A vertically extending transmission link having a lower end connected to a second swing link, and a link having one end connected to a fulcrum pin of a frame located above the swing fulcrum axis and extending in parallel with the first swing link. And a first swing link, and a dynamic balance weight which is provided by connecting both ends thereof in the up-down direction and dynamically balances the elevation of the slide portion. And

[0009]

1 to 5 show an embodiment of a press machine using a toggle link mechanism according to the present invention. 1 to 4 show a configuration of a press machine 1 according to a first embodiment. FIG. 1 shows a state where the slide 2 is at the position of the bottom dead center from the center and a state where the slide 2 is at the position of the top dead center from the center. The slide 2 is driven at two points. Each point is provided with a shaft 3 which is oriented in the front-rear direction, and is connected to a lower end of a link 4 which is directed substantially vertically. Swing links 6 are connected to the upper ends of the slide drive links 4 by pins 5 and extend substantially horizontally in the left and right outer directions. The swing links 6, 6 are rotatably connected at their intermediate lengths to swing fulcrum shafts 9, 9 of rods 8, 8 provided on a frame 7 so as to be vertically movable.
Details of these connecting parts are shown in FIG.

Lower links 11, 11 whose lower ends are connected by pins 10, 10 to an intermediate portion of the swing link 6 near the pin 5.
Are connected to the upper links 13 and 13 by connecting pins 12 and 12 at the upper end.
Are linked. The upper ends of the upper links 13 are connected to support pins 14 provided on the frame 7 at positions directly above the pins 10. The upper link 13 and the lower link 11 constitute a toggle link mechanism.

A connecting rod 19 is connected to an eccentric part 18 of a crankshaft 17 driven to rotate by a main motor 15 via a flywheel 16, and is guided vertically by the frame 7 above the crankshaft 17 to perform vertical movement. A slider 20 is provided. Details of this part are shown in FIG. A connecting shaft 21 facing the front and rear direction is provided on an upper portion of the slider 20, and the connecting shaft 21 and the connecting pins 12 of the toggle link mechanism are connected by connecting links 22, 22. Details of this part are shown in FIG.

At the positions of the swinging fulcrum shafts 9 of the rods 8, 9, fulcrum pins 23, 23 pointing in the front-rear direction are provided, and are connected to the fulcrum pins 23, 23. Links 24, 24 having equal lengths are provided in parallel with the extension portions on the left and right outer sides of the pivot shafts 9, 9, and dynamic balance weights 25, 25 are provided between the extension portions and the links 24, 24. .
When the slide 2 moves up and down due to the bending and stretching of the toggle link mechanism, the dynamic balance weights 25 move up and down in the opposite direction to the slide 2 to dynamically balance the movement of the slide 2 portion.

A thread 26 is provided at the upper end of the rods 8, 8, and the die height adjusting device 2 provided on the upper surface of the frame 7 is provided.
It is screwed into a female screw at the center of the worm wheel 28 provided in the interiors 7 and 27. The worm wheel 28 is rotatable around the center in the vertical direction and is restricted from moving in the vertical direction. A worm screw provided on the outer periphery of the worm wheel 28 is screwed with the worm 29. By rotating the left and right worms 29 in synchronization, the worm wheel 28 is rotated, and the rods 8 to be screwed are moved up and down. When the swinging fulcrum shafts 9 and 9 move up and down together with the rods 8 and 8, the inclination of the swinging links 6 and 6 connected to the toggle link mechanism changes, and the slide 2 is moved up and down.
The die height of slide 2 can be adjusted.

On the upper surface of the slide 2, there are provided guide cylinders 30, 30 surrounding the outer periphery of the slide drive links 4, 4,
The guide cylinders 30, 30 are vertically movably guided by the frame 7, and guide rods 31 are provided upright at four corners on the lower surface of the slide 2, and are vertically moved by guides 32 provided on the bed of the frame 7. Guided freely.

FIG. 5 shows a press machine 1A according to a second embodiment of the present invention. Since the configuration of the press machine 1A is similar to that of the first embodiment, only the components different from those of the first embodiment will be described, and the others will be omitted. The upper link plates 33, 33 are provided on the support pins 14, 14, and the lower links 11, 11 are connected thereto by the connecting pins 12, 12, and the lower links 11, 11 are connected to the lower ends thereof. The pivot shaft 9 provided,
9 are provided with first swing links 34, 34, and dynamic balance weights 25, 25 are connected to the other end.

The lower links 11, 11 and the transmission links 35, 3
5 are provided substantially parallel to the first swing links 34, 34, and the second swing links 36, 36
The inner end of 36 is connected to the upper end of the slide drive link 4, 4, and the outer end is connected to the upper end of the shaft of the die height adjusters 37, 37 provided on the left and right sides of the lower part of the crown of the frame 7. I have.

The first oscillating links 34, 34 do not act on the slide 2 because they bear the horizontal component of the vertical driving force of the toggle link mechanism consisting of the upper link plates 33, 33 and the lower links 11, 11. In this manner, the dynamic balance weights 25, 25 are driven in the opposite direction to the vertical movement of the slide 2 to achieve the dynamic balance of the slide 2.

The second swing links 36, 36 enable the die height adjustment of the slide 2 when the die height adjustment devices 37, 37 are moved up and down in synchronization. In addition, the provision of the second swing links 36 enables the die height adjustment devices 37 to be provided below the crown portion of the frame 7.

[0019]

As is apparent from the above description, according to the present invention, by providing the swinging link or the first swinging link, the lateral component of the slide driven by the toggle link mechanism can be eliminated. I can do it. Further, a dynamic balance weight for obtaining a dynamic balance of the slide can be easily provided. Further, by providing a rod connected to the die height adjusting device or the second swing link, the die height of the slide can be easily adjusted.

[Brief description of the drawings]

FIG. 1 is a front view of a main part of a press machine according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional plan view of the main part of the upper part of the crown portion of the frame.

FIG. 3 is a cross-sectional plan view of a main part of a lower portion of a crown portion of the frame.

FIG. 4 is a vertical sectional side view of a main part of the central part.

FIG. 5 is a front view of a main part of a press machine according to a second embodiment of the present invention.

[Explanation of symbols]

1, 1A is a press machine, 2 is a slide, 3 is a shaft, 4 is a slide drive link, 5 is a pin, 6 is a swing link, 7 is a frame, 8 is a rod, 9 is a swing fulcrum shaft, 10 is a pin, 1
1 is a lower link, 12 is a connecting pin, 13 is an upper link, 14
Is a support pin, 15 is a main motor, 16 is a flywheel, 17 is a crankshaft, 18 is an eccentric part, 19 is a connecting rod, 20 is a slider, 21 is a connection shaft, 22 is a connection link, 23 is a fulcrum pin, and 24 is a fulcrum pin. Link, 25 is a dynamic balance weight, 26 is a threaded portion, 27 is a die height adjuster, 28 is a worm wheel, 29 is a worm, 3
0 is a guide cylinder, 31 is a guide rod, 32 is a guide, 3
3 is an upper link plate, 34 is a first swing link, 35 is a transmission link, 36 is a second swing link, and 37 is a die height adjusting device.

Claims (4)

[Claims] 1. An eccentric part (18) of a rotationally driven crankshaft (17) is connected by a connecting rod (19),
A slider (20) slidably guided in a vertical direction on a frame (7) above the crankshaft (17), a connecting shaft (21) of the slider (20), and a slide (2) are vertically driven. In a press machine using a toggle link mechanism composed of a connection link (22) connecting a center link connection pin of a toggle link mechanism, (a) an upper end is connected to a support pin (14) of a frame (7). The lower end of the lower link (11) connected to the link (13) by the connecting pin (12) is connected to the lower end of the lower link (11), and the other end extending substantially in the horizontal direction is connected to the pivot (9) of the frame (7). A swing drive link (6), and (b) a slide drive link (4) that connects the swing link (6) and a point portion of the slide (2) and that faces substantially vertically. Symmetrical placement Press machine using a toggle link mechanism which is characterized in that. 2. The swing support shaft (9) according to claim 1, wherein (a) an end portion of the swing link (6) extending beyond the swing support shaft (9), and (b) an upper end of the swing support shaft (9). Frame (7)
And a link (24) having one end connected to the fulcrum pin (23) and extending outward in parallel with the swing link (6), and having both ends connected in the up-down direction. And a dynamic balance weight (25) for dynamically balancing lifting and lowering of the press machine using the toggle link mechanism. 3. The frame (7) according to claim 1, wherein (a) the frame (7) is connected to a pivot shaft (9) of the pivot link (6).
A die height adjusting device (27) provided on the top of the frame (7) and capable of adjusting the vertical position of the rod (8);
A press machine using a toggle link mechanism, comprising: 4. An eccentric part (18) of a rotationally driven crankshaft (17) is connected by a connecting rod (19),
A slider (20) slidably guided in a vertical direction on a frame (7) above the crankshaft (17), a connecting shaft (21) of the slider (20), and a slide (2) are vertically driven. In a press machine using a toggle link mechanism composed of a connection link (22) connecting a center link connection pin of a toggle link mechanism, (a) an upper end is connected to a support pin (14) of a frame (7). A first swing connected to the lower end of the lower link (11) connected to the link plate (33) by the connecting pin (12), extending substantially in the horizontal direction, and having an intermediate portion connected to the swing support shaft (9); Link (3
4), (b) a slide drive link (4) having a lower end connected to the point of the slide (2) and provided substantially in the vertical direction, and (c) one end at the upper end of the slide drive link (4). A second swing link (36) connected to the first swing link (34) and extending substantially parallel to the first swing link (34), and the other end connected to a die height adjusting device (37) capable of adjusting the vertical position.
(D) a vertically oriented transmission link (35) having an upper end connected to the lower end of the lower link (11) and a lower end connected to the second swing link (36); A link (24) having one end connected to a fulcrum pin (23) of the frame (7) located above the oscillating fulcrum shaft (19) and extending in parallel with the first oscillating link (34); (F) a dynamic balance weight (25) which is provided to be connected to the first swing link (34) at both ends thereof in the vertical direction and dynamically balances the elevation of the slide portion (2); ,
A press machine using a toggle link mechanism, characterized in that the arrangement of these members is bilaterally symmetric.