JPH08118099A - Driving device for slide in mechanical press - Google Patents

Abstract

PURPOSE: To attain a driving device for a slide, with a slow slide speed and with satisfactory machining accuracy in a press working area in a mechanical press by which press working in plural processes is simultaneously performed. CONSTITUTION: An auxiliary slide 8 provided on the upper part of a crank shaft 7 is vertically driven by a connecting rod 9, and the upper part of an individual main slide 10 corresponding to plural processes is mounted on the auxiliary slide 8. On this mounting part, a slide position adjusting mechanism adjusting a die height for each main slide 10 and a fluid pressure cylinder bringing the gap of the screw of this slide position adjusting mechanism near to one side in the shaft direction to fix it, are provided. Each main slide 10 is freely and vertically guided by a press frame 2. A main gear 6 fixed on the crank shaft 7 is driven by a shaft with a pinion gear 5, a flywheel 4 with a clutch brake, and a main motor 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide driving device in a mechanical press having a plurality of slides, and for slowing down the speed of the slides in the working area of the press so as to perform a precise sliding motion even during the pressing work. To use.

[0002]

2. Description of the Related Art In a conventional mechanical press, a slide is provided at the lower part of a crankshaft and is vertically driven via a connecting rod. Further, the slide is not divided into a sub slide and a main slide, but is formed integrally. The slide that is integrally formed is provided with a slide position adjusting mechanism between the connecting rod and the slide, or a slide position adjusting mechanism is provided below the slide.

Further, in this slide driving mechanism in which the lower slide is driven from the crankshaft provided at the upper part through the connecting rod, the speed of the slide during the press work near the bottom dead center is higher than that near the top dead center. This corresponds to the case where the B-side bottom dead center in FIG. 3 is set.

Further, in the integrated slide, a work load is applied to the slide during the pressing work, so that the slide is deformed, and the deformation amount and inclination of the plurality of process parts provided on the slide are changed depending on the process. .

[0005]

In order to secure the working height of each mold used in a plurality of processes, a) each process has a slide position adjusting mechanism, and the slide position can be adjusted in each process. , B) Even if the rotation speed of the press is increased to increase the production speed,
The speed of the slide during the press work is slow or does not increase. C) In order to obtain highly accurate press parts, the upper die of each process during the press work is not tilted. D) The slide position adjustment mechanism It is required that there be no slide position accuracy due to looseness of screws.

An object of the present invention is to provide a slide drive device in a mechanical press that can meet these demands.

[0007]

In order to achieve the above object, the present invention provides a sub-slide provided on the upper part of a crankshaft,
Drive vertically from the crankshaft via the connecting rod,
At least two main slides are attached to the sub-slides, and a slide position adjusting mechanism that adjusts the die height of the main slide and a fluid pressure cylinder that shifts the clearance of the screw of the slide position adjusting mechanism to one side in the axial direction are provided in this attachment part. , A machine in which a main slide is vertically guided by a guide provided on a press frame and is driven by a sub slide so that a plurality of steps are simultaneously performed by using a plurality of molds while the slide is descending. It constitutes a slide driving device in a press.

[0008]

Since the auxiliary slide on the upper part of the crankshaft is driven via the connecting rod, the speed of the auxiliary slide becomes slow near the top dead center. The main slide attached to this sub-slide changes the same speed, and in the main press in which the press work is performed while descending, the speed of the slide during the press work becomes slow.

A work load acts on the center of a main slide provided for each process on the sub-slide, and the main slide is guided by a press frame for each process. Therefore, the lower surface of the main slide operates without inclination. . Therefore, the upper mold for each step attached to the main slide operates without tilting even during work.

A slide position adjusting mechanism is provided in the mounting portion of the sub-slide and the main slide to adjust the position of each main slide, and further, the slide position adjusting mechanism of this mounting portion is screwed by a fluid pressure cylinder that brings the screw gap to one side. Except for the backlash, it does not affect the press working accuracy.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention is shown in FIGS. 1A and 1B, a main motor 3 is installed above a press frame 2 of a mechanical press 1, and a flywheel 4 driven by the main motor 3 is internally provided with a clutch / brake (not shown). A shaft (not shown) having the pinion gear 5 is rotationally driven or stopped. A main gear 6 meshing with the pinion gear 5 is fixed to one end of a crank shaft 7 rotatably supported by the press frame 2.

The eccentric portion 7A of the crankshaft 7 and the auxiliary slide 8
The pin 8A is connected by the connecting rod 9, and the drive system of the auxiliary slide 8 from the pinion gear 5 to the connecting rod 9 is provided on the upper left and right sides of the press frame 2 of the mechanical press 1, and the left and right pinion gears 5 and 5 are respectively described above. Are fixed to both ends of a shaft (not shown). Therefore, the sub slide 8 is driven up and down in synchronization with the left and right sides. The sub slide 8 is guided by the press frame 2 so as to be vertically movable.

A plurality of main slides 10 corresponding to a plurality of steps of the mechanical press 1 are provided at an intermediate portion of the auxiliary slide 8 in the left-right direction.
Is provided. The upper part of the main slide 10 is fixed to the sub-slide 8, and the lower part is guided by the press frame 2 so as to be vertically movable. In addition, a slide position adjusting mechanism, which will be described later, is provided at an intermediate portion in the vertical direction of the main slide 10.

In FIG. 2, the structure of one main slide 10 attached to the sub slide 8 will be described. The bottom plate portion of the sub-slide 8 is provided with a hole 8B penetrating in the vertical direction corresponding to the position where the main slide 10 is provided.
The adjusting screw receiver 11 which is divided into upper and lower parts is inserted into and is bolted. The adjusting screw receiver 11 is rotatable with respect to the sub slide 8. A female screw 12 is provided in the vertical direction at the center of the adjusting screw receiver 11, and a gear 13 is provided on the outer periphery.

The main slide body 14 has an adjusting screw 15 on the outer periphery of an intermediate portion screwed into the female screw 12, and an upper end portion thereof penetrates the center of the adjusting screw receiver 11 and projects upward. The piston 16A of the slide lock cylinder 16 is fixedly mounted on the upper end of the projected main slide body 14,
Adjusting screw 1 by supplying / discharging pressure fluid to / from the lower cylinder chamber 6A
The main slide 14 can be fixed to or released from the adjusting screw receiver 11 by urging or releasing 5 upward.

The circular middle portion of the main slide body 14 is vertically guided by a press frame (not shown),
And rotation is regulated. In addition, the main slide body 14
A knockout cylinder 17 is provided in the middle part of the, and the center of the lower surface of the knockout piston 17A installed in this is
A knockout pin 18 is provided so as to project. The lower end portion of the main slide body 14 is a mold attachment portion 19 having a rectangular cross section. The knockout pin 18 is desired in the center hole of the mold mounting portion 19.

An adjusting shaft 20 having an upper end rotatably supported by the auxiliary slide 8 is provided in the vertical direction in front of the main slide 10, and a small gear 21 meshing with a gear 13 of an adjusting screw receiver 11 is provided on the adjusting shaft 20 as a key. I have stopped.

By removing the pressure fluid from the slide lock cylinder 16, releasing the fixation of the female screw 12 of the adjusting screw receiver 11 and the adjusting screw 15 of the main slide body 14, and turning the adjusting shaft 20 with a tool such as a ratchet handle. , The adjusting screw receiver 11 is rotated by the small gear 21, and by the rotation of the female screw 12,
Adjustment screw 15 of main slide body 14 whose rotation is restricted
Can be adjusted up and down.

After the position adjustment, the slide lock cylinder 16
A pressure fluid is supplied to the main slide body 14 to urge the main slide body 14 upward to fix the main slide body 14 to the adjusting screw receiver 11, and the die height adjustment of the main slide 10 is completed. In this way, the main slide 10 can be adjusted in die height individually.

As shown in FIG. 3, the main slide 10 has a slow stroke speed in the press working area near the bottom dead center.
It is clear that the stroke speed is high near the top dead center. In FIG. 1, the sub-slide 8 above the crankshaft 7 is driven through the connecting rod 9, and the main slide 10 moves together with the sub-slide 8.
Then, the A side of the crankshaft 7 becomes the pressing work area of the main slide 10.

In the conventional mechanical press, B of the crankshaft 7 is
The side was the press working area, which is the opposite. The working range of the main slide 10 of this embodiment changes depending on the connecting rod ratio, but the practical range is from 146 ° to 1 in crank angle.
The range is 65 °, which is larger than the conventional press working area corresponding to this range of 130 °. Therefore, it is understood that the stroke speed in the press working area of the main slide 10 of the present invention is slower than that near the top dead center.

[0022]

As is apparent from the above description, the present invention has the following effects. B) Since the sub-slide is provided on the upper part of the crankshaft and the main slide is attached to the sub-slide, the stroke speed of the main slide can be reduced in the press work area near the bottom dead center. B) Since the sub-slides are provided with main slides for multiple processes and are individually guided by the press frame so that they can move up and down, there is no risk of the upper die tilting during press work, and accurate product press processing is possible. Can be done. C) A slide position adjusting mechanism is provided for each main slide to adjust the die height, and the backlash of the adjusting screw is removed by the slide lock cylinder and fixed, so the slide position accuracy is improved.

[Brief description of drawings]

FIG. 1A is a right side view of a main part of a mechanical press according to the present embodiment. FIG. 1B is a front view of a main part of a mechanical press according to the present embodiment.

FIG. 2 is a right side view of the main slide in this embodiment.

FIG. 3 is an explanatory diagram showing a relationship between a crank angle and a slide stroke.

[Explanation of symbols]

1 is a mechanical press, 2 is a press frame, 3 is a main motor, 4 is a flywheel, 5 is a pinion gear, 6 is a main gear, 7 is a crankshaft, 7A is an eccentric part of the crankshaft 7, 8 is an auxiliary slide, and 8A is an auxiliary. Slide 8 pin, 8B
Is a hole of the auxiliary slide 8, 9 is a connecting rod, 10 is a main slide, 11 is an adjusting screw receiver, 12 is a female screw, 13 is a gear, 1
4 is a main slide body, 15 is an adjusting screw, 16 is a slide lock cylinder, 16A is a piston, 17 is a knockout cylinder, 17A is a knockout piston, 18 is a knockout pin, 19 is a mold mounting portion, 20 is an adjusting shaft, and 21 is Small gears.

Claims (1)

[Claims] 1. A fluid pressure cylinder for moving a screw gap of a slide position adjusting mechanism to one side in an axial direction in a mechanical press for performing a press work using a plurality of molds in a plurality of steps while a slide is descending. In the slide drive,
A sub-slide provided on the upper part of the crankshaft is vertically driven from the crankshaft via a connecting rod, and at least two main slides are attached to the sub-slide, and the main slides are provided on the attachment portions. And a slide position adjusting mechanism for adjusting the die height of the main slide, and the main slide is vertically guided by a guide provided on a press frame so that the main slide is driven by the sub slide. apparatus.