JPH0910994A - Multi-slide mechanical press - Google Patents

Abstract

PURPOSE: To provide a multi-slide mechanical press with a slide guide and a slide adjusting screw lock mechanism having a simple structure and machining precision without the need of expanding a pitch between the slides. CONSTITUTION: The press is structured such that a slide 6 is constituted of a square post 6A and a cylinder 6B, with the square post 6A guided by a pressure guide 7, 7 and with the cylinder 6B by a cylindrical guide 8, and that the slide 6 is guided freely movably in the vertical direction. In addition, a slide adjusting screw lock mechanism is so structured that the cylinder 6B is provided with a female screw which screws onto an adjusting screw 18 with a male screw, and fixed on the lower face of the male screw which screws into the adjusting screw, and that a pressure oil is supplied to a hydraulic chamber formed by a cylinder 13 fixed on the lower face of the cylinder 6B and a pressure plate 19, raising the pressure plate 19, pressing the clearance of the screw of the adjusting screw to one side and controlling the rotation of the screw.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-slide mechanical press having a plurality of slides, and can be used for a guide mechanism for each slide and a screw lock mechanism for slide adjustment for adjusting the position of a pressure receiving plate to which an upper die is attached. .

[0002]

2. Description of the Related Art In the prior art, the slide of a mechanical press generally uses a rectangular guide that guides vertical movement at four corners. In some small mechanical presses, a cylindrical guide is used.

The vertical movement of the slide adjustment for adjusting the die height is performed by inserting an adjusting rod into a pin hole provided on the outer peripheral surface of the adjusting screw and manually rotating the adjusting screw. There is a mechanism in which an adjusting screw is rotated manually or through a worm wheel that meshes with a worm shaft that is rotated by a brake motor, an air motor, or the like. However, none of the mechanisms is provided with a slide adjusting screw lock mechanism that suppresses rotation of the adjusting screw caused by a gap between screw parts to be engaged with each other during press working after completion of slide adjusting.

[0004]

SUMMARY OF THE INVENTION Among the above prior arts,
In a mechanical press that uses a rectangular guide, when multiple slides are provided without expanding the pitch between slides, the space for providing guides for adjacent slides is small, and the guides for each slide must have sufficient strength. Since it is difficult, there are drawbacks such that the upper limit of the load is limited to a low level and sufficient processing accuracy cannot be obtained.

Further, in the mechanical press in which the slides are vertically guided by the cylindrical guide, there is a drawback that a rotation stopping mechanism must be provided for each of the slides so that the slides do not rotate.

Further, at the time of press working after completion of slide adjustment for adjusting the position of the upper die of the mold, the adjustment screw is slightly rotated by the gap between the screw parts to be engaged with each other, or the slide is caused by the gap of the screw. The bottom dead center position has changed, affecting the processing accuracy.

The object of the present invention is to improve the precision of vertical guide of slides and the precision of rotational position without expanding the pitch between slides, and to adjust the adjusting screw of the slide adjusting mechanism, except for these drawbacks. And the effect of the gap
It is to suppress the screw rotation that you do not expect. That is,
In the slide of a mechanical press that drives the slide with the connecting rod mechanism, the horizontal component force is generated in addition to the force due to the vertical press work load, so the accuracy of the vertical movement of the slide decreases, but this accuracy decrease To provide a slide guide that can be prevented, and further, after the adjustment of the slide adjustment mechanism that adjusts the upper die position is completed, the gap between the screw parts to be screwed together is pushed to one side and pressed, and the slide adjustment screw locking mechanism is provided. To provide a mechanical press.

[0008]

In order to achieve the above-mentioned object, the present invention provides a slide in which a plurality of slides are integrally formed with a prismatic portion as an upper portion and a cylindrical portion as a lower portion. Pressure guides are provided at the positions facing the front and rear sides of the prismatic part of the slide to guide the slide in the vertical direction and hold it unrotatably, and a cylindrical guide is provided at the position facing the cylindrical part at the bottom of the slide. Guide the slide up and down.

Further, a female screw is provided on the lower portion of the cylindrical portion of the slide, and an adjusting screw having a male screw on the upper portion is screwed with the female screw. A pressure receiving plate to which the upper die of the die is attached is provided in a cylinder fixed to the lower surface of the cylindrical portion of the slide. By supplying pressure oil to the hydraulic chamber formed by the cylinder and the pressure receiving plate, the pressure receiving plate is pushed up, and the adjusting screw that abuts against this pressure receiving plate is pushed up. And press it to suppress the relative rotation of the slide and adjusting screw,
A slide adjusting screw lock mechanism for adjusting the position of the pressure receiving plate to which the upper die is attached is provided.

[0010]

Since the prismatic portion and the cylindrical portion of the slide are guided by the pressure receiving guide and the cylindrical guide provided on the frame,
The horizontal force acting on the slide and the rotating force are received by the pressure receiving guides on both the front and rear side surfaces of the prismatic portion, and the vertical direction is guided by the pressure receiving guide and the cylindrical guide.
The parallelism, squareness and rotation required for the slide and the position accuracy in the horizontal plane are effectively maintained.

After the completion of the slide adjustment for adjusting the position of the pressure receiving plate to which the upper die is attached, pressure oil is supplied to the hydraulic chamber formed by the cylinder and the pressure receiving plate provided on the lower surface of the cylindrical portion to move the pressure receiving plate. Push up, thereby pushing up the adjusting screw, pressing the gap between the threaded parts of the female screw and the male screw to be screwed to one side, and suppressing the rotation of the adjusting screw, the slide bottom dead center position during press working is maintained, The processing accuracy is stable.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1, 2 and 3 show the structure of a mechanical press in a first embodiment of the present invention. In FIG. 1, an upper end portion of a connecting rod 5 is rotatably connected to an eccentric portion 4 of a crankshaft 3 which is rotatably supported on an upper portion of a frame 2 of a mechanical press 1. At the lower end of the connecting rod 5, there is a sphere 5A.
Is provided, and this spherical portion 5A is rotatably connected at the upper end of the slide 6.

As shown by the chain double-dashed line in FIG.
Has a structure in which the upper portion is a prismatic portion 6A and the lower portion is a cylindrical portion 6B, which are integrally formed.

In the middle part of the frame 2 in the up-down direction, as shown in FIG.
As shown in FIG. 2, the receiving surface guides 7, 7 fixed to the first casing 10 for vertically guiding the front and rear side surfaces of the prismatic portion 6A of the slide 6 and the second guides for vertically guiding the cylindrical portion 6B are provided.
A cylindrical guide 8 is provided which is fitted to the casing 11 and whose lower surface is held by the retainer 12. Further, the frame 2 is provided with balance cylinders 9 and 9 for biasing upward,
The piston rods 9A and 9A of the balance cylinders 9 and 9 are connected to the upper end of the slide 6 to balance the weight of the slide 6. The weight of the slide 6 includes the die height adjusting portion 6C provided at the lower end of the slide 6 and the upper die (not shown) of the die attached below the die height adjusting portion 6C, as in a normal press machine.

In FIG. 1, when the crankshaft 3 rotates, the center O2 of the eccentric portion 4 rotates around the center O1 of the crankshaft 3. Therefore, the connecting rod 5 rotates back and forth about the center O3 of the spherical portion 5A within the range of the angle θ. When the power of the crankshaft 3 is transmitted to the slide 6, due to the rotation angle θ of the connecting rod 5, a thrust force, which is a horizontal component force in the front-rear direction, is generated on the slide 6 in addition to the vertical driving force. However, since the pressure receiving guides 7, 7 fixed to the first casing 10 receive the thrust force, the power transmission is smooth and the precision required for the mechanical press can be effectively maintained.

FIG. 3 shows a multi-slide mechanical press 1 in which the three slides 6 constructed as described above are arranged side by side.
Is shown. The arrangement of the pressure surface guide 7 and the cylindrical guide 8 constituting the slide guide is as shown in FIG. 2, and it is not necessary to increase the pitch between slides of the adjacent slides 6, so that the lateral dimension of the mechanical press 1 can be reduced. I can. Further, since the receiving surface guide 7 guides the prismatic portion 6A of the slide 6, it prevents the slide 6 from rotating around the central axis in the vertical direction.

FIG. 4 shows a slide adjusting portion in the second embodiment of the present invention. In the second embodiment, the cylindrical portion of the slide in the first embodiment is a lower cylinder in which the upper cylindrical portion 16B and an adjusting screw 18 for fixing the external gear 17 on the lower surface are screwed to the screw portion provided on the inner circumference. Is divided into a part 16D and an upper cylindrical part 16
B and the lower cylindrical portion 16D are fastened together by bolts to be integrated, and are fitted to the second casing 11 as in the first embodiment and guided by the cylindrical guide 8 whose lower surface is held by the retainer 12. Of course, it goes without saying that the upper cylindrical portion 16B and the lower cylindrical portion 16D may be integrated.

A cylinder 1 which is fastened to the lower surface of the lower cylindrical portion 16D by bolts and has a pressure oil supply / discharge port 13A on its outer peripheral surface.
3, the worm shaft 14 and the worm wheel 15 that mesh with each other, the external gear 17 that meshes with the internal gear provided on the inner periphery of the worm wheel 15, and the external gear 17 adjusting screw 18 The pressure receiving plate 19 is provided inside.

During press working after completion of slide adjustment for adjusting the position of the pressure receiving plate 19 to which the upper die is attached, the pressure oil supply / discharge port 13A of the cylinder 13 provided on the lower surface of the lower cylindrical portion 16D is moved to the hydraulic chamber 20. When pressure oil is supplied, the pressure receiving plate 19 provided in the cylinder 13 causes the external gear 1 to move.
The rotation of the adjusting screw 18 is suppressed by pushing up the gap between the adjusting screw 18 that is screwed via 7 and the screw portion of the lower cylindrical portion 16D. Needless to say, the adjusting screw 18 and the external gear 17 may be integrated as an adjusting screw.

The pressure receiving plate 19 to which the upper die is attached
Although not shown, the slide adjustment for adjusting the position of is performed manually or by rotationally driving the worm shaft 14 by a brake motor, an air motor, or the like. Also,
The upper structure of the slide 16 in which the front and rear side surfaces of the prismatic portion 6A of the slide 16 are vertically guided by the receiving surface guides 7 fixed to the first casing 10 is the same as that of the first embodiment.

[0021]

As is apparent from the above description, according to the present invention, the prism is provided at the upper part of the slide and the cylindrical part is provided at the lower part, and the pressure receiving guide is provided in the frame in correspondence with the direction of rotation of the connecting rod. That is, it is possible to improve thrust in the vertical direction of the slide with the pressure receiving guide and the cylindrical guide by providing the thrust force in the front-rear direction. That is, by combining the pressure receiving guide and the cylindrical guide, it is possible to provide a mechanical press having a slide guide having a large effect with a simple structure.

Further, by providing the slide height adjusting screw locking mechanism in the die height adjusting mechanism for adjusting the position of the pressure receiving plate to which the upper die is attached, the slide bottom dead center position at the time of press working is maintained, and the working accuracy is stabilized.

[Brief description of the drawings]

FIG. 1 shows a main part of a mechanical press according to a first embodiment,
III sectional view of FIG.

FIG. 2 is a plan view of a main part of the frame in FIG.

[Fig. 3] Front view of a mechanical press

FIG. 4 is a sectional view of a slide adjusting portion in the second embodiment.

[Explanation of symbols]

1 is a mechanical press, 2 is a frame, 3 is a crankshaft, 4 is an eccentric part, 5 is a connecting rod, 5A is a spherical part, 6 and 16 are slides, 6A is a prism, 6B is a cylindrical part, 6C and 16C are die height adjustments. Part, 7 is a pressure receiving guide, 8 is a cylindrical guide, 9
Is a balance cylinder, 9A is a piston rod, 10 is a first casing, 11 is a second casing, 12 is a retainer, 13 is a cylinder, 13A is a pressure oil supply / discharge port, 14 is a worm shaft, 15 is a worm wheel, and 16B is Upper cylindrical portion, 16D lower cylindrical portion, 17 external gear, 18 adjusting screw, 19 pressure plate, 20 hydraulic chamber, O1 center of crankshaft 3, O2 center of eccentric portion 4, O3 ball. The center of the portion 5A, θ is the rotation angle of the connecting rod 5.

Claims (2)

[Claims] 1. A multi-slide mechanical press having a plurality of slides which are vertically moved through connecting rods connected to an eccentric part of a crankshaft, wherein the plurality of slides are integrally formed with a prismatic part as an upper part and a cylindrical part as a lower part. The mechanical press frame is provided with pressure receiving guides at positions facing the front and rear side surfaces of the prismatic portion of the slide, and cylindrical guides are provided at positions facing the outer circumference of the cylindrical portion, respectively, and the slide is moved in the vertical direction. A multi-slide mechanical press characterized by guiding. 2. The mechanical press according to claim 1, wherein a female screw is provided in a lower portion of the cylindrical portion of the slide, and an adjusting screw having a male screw which is screwed with the female screw in an upper portion is screwed into the lower face of the adjusting screw. A pressure receiving plate that abuts the upper surface and attaches the upper die of the mold to the lower surface is provided in a cylinder fixed to the lower surface of the cylindrical portion of the slide, and pressure oil is supplied to a hydraulic chamber formed by the cylinder and this pressure receiving plate. Push up the pressure receiving plate, push up the abutting adjusting screw, push the gap between the female screw and the male screw screwing part to one side and press it to suppress the relative rotation of the slide and the adjusting screw, and position the pressure receiving plate. A multi-slide mechanical press equipped with a slide adjusting screw locking mechanism for adjusting.