JPH01118400A - Slide guide for press - Google Patents

Abstract

PURPOSE:To surely guide the lift of a slide and to improve the product accuracy by providing a movable gib corresponding to the direction of larger bending stress received by the slide. CONSTITUTION:When a press 1 is operated and a slide 6 reaches the lower dead center shown by a dashed line, the load F by pressing acts on the lower face center part of the slide 6 which receives a bending stress in the form of its being pushed up by the deflection amt. (a) at the center part in the right and left directions. The upper part of the slide 6 is bulged by a displacement amt. (b) to the outside in the right end left directions to intend to deform a column 3. The lower part of the slide 6 is pulled in by a displacement amt. (c) to the inside in the right and left directions to intend to enlarge the gap between a sliding pad 10 and liner 12. At this time a movable gib 8 is turned centering around a gib holding pin 11, working so as to compensate the displacement amt. (b) and (c) and holding the gap of the pad 10 and liner 12 optimum. The lift movement of the slide 6 is thus guided correctly in the vertical direction and the working accuracy of a press can be maintained well.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention divides the seven frames of a press into a bed, column, and crown, and tightens these with tie rods.The slide of the press has a tie rod type seven frame structure. This invention relates to a slide guide for a press suitable for raising and lowering the press as a guide.

``Prior art'' Conventionally, the slide of a press with a tie-rod type 7-frame structure has a vertical give at the four corners of the slide and a column facing the slide, and the slide can be moved up and down by adjusting the gap between the give appropriately. I was letting it happen.

"Problems to be Solved by the Invention" The conventional slide guide described above can accurately guide the slide up and down when no load is applied to the slide of the press. However, when pressing a material with the upper die attached to the slide of the press and the lower die attached to the bolt, a large upward force is applied to the center of the slide.
The slide is subjected to bending stress and deflects.

This tendency is particularly noticeable in transformer 7 abrasions, where the slide is long from side to side, as a two-point type in which both the left and right ends of the slide are driven by a crankshaft is often used. The deflection of the slide is such that the top side of the slide is extended and the bottom side is compressed, so the column deforms outward at the top side of the slide, and the gap between the slide and column widens at the flexible area, resulting in insufficient guidance. The machining accuracy of the press decreases, and the wear of the gib becomes uneven, shortening its life.

The object of the present invention is to eliminate these drawbacks, to allow the gib to follow the deformation caused by the bending stress of the slide, to maintain the gap between the slide side gib and the column side gib almost constant at all times, and to improve the machining accuracy of the press. The purpose of the present invention is to provide a slide guide for a press that can maintain the press life and extend the life of the press.

[Means and effects for solving the bottleneck] The structure of the present invention is such that fixed gibs having concave orthogonal surfaces facing inward in the front-rear direction and the left-right direction are mounted on columns corresponding to the four corners of the slide of the press in the vertical direction. At the four corners of the slide, there are movable gibs with perpendicular surfaces in contact with the fixed gib and the full height of the slide in the vertical direction. The present invention is characterized in that a gib holding pin is provided that penetrates in the front and back direction at the front and back sides and is fixed to the front and rear surfaces of the slide to rotatably hold the movable gib. Therefore, the slide moves up and down while the movable gib is guided by the fixed gib of the column, and if the center of the slide in the left and right direction is pushed up due to the stress of press working and bends due to bending stress, the movable gib rotates according to the deformation. , the gap between the movable gib and the fixed gib can always be maintained substantially constant, and the column will not be deformed.

"Example" In FIGS. 1 and 2, the structure of a slide guide of the present invention provided in a press 1 is shown. The press 1 has a tie rod type frame structure in which four columns 3 are erected at the front and back on both left and right sides of a bed 2 when viewed from the front, a crown 4 is placed on the columns 3, and the columns are tightened from above and below with tie rods 5. As shown in Fig. 2, the slide 6 is connected to the eccentric part of a crankshaft (not shown) by a connecting rod at two points at both left and right ends, and is driven up and down by the rotation of the crankshaft. Ru.

Movable gibs 8 are provided at the four corners of the slide 6 along the front and rear surfaces of the slide 6, extending over almost the entire vertical length of the slide 6, and fixed gibs 9 corresponding to the movable gibs 8 are provided on each flamm 3. ing. The movable gib 8 is provided with a sliding pad 10 whose protruding surfaces facing outward in the left-right direction and the front-back direction are orthogonal to the outside of the four corners of the slide 6, and the vertical center of this pad is attached to the gib. It is rotatably fixed with a holding pin 11. The sliding pad 1 of the movable gib 8 is attached to the fixed gib 9.
0 and a sliding surface perpendicular to the corresponding concave shape from the outside in the left-right direction and the front-back direction, and in the left-right direction, the liner 12 is directly fixed to the column 3 with screws, etc., and in the front-back direction, the liner 13 is fixed with a holding pin 14. Fixed. These structures are arranged symmetrically about the center line CL shown in FIG.

Next, the operation will be described with reference to FIG. When the press 1 is operated for press working and the slide 6 reaches the bottom dead center (lower limit) indicated by the dashed line, the load F due to press working
acts on the center portion of the lower surface of the slide 6, and the slide 6 receives bending stress in such a manner that the center portion in the left-right direction is pushed up by the deflection amount a.

As a result, the upper part of the slide 6 is displaced outward in the left-right direction f
An attempt is made to deform the overhang flam 3 by ib. Further, the lower part of the slide 6 is pulled inward in the left-right direction by a displacement amount c to try to widen the gap between the sliding pad 10 and the liner 12. At this time, the movable gib 8 rotates around the gib holding pin 11 and operates to compensate for the displacement] and C.
To optimally maintain a gap between a sliding pad 10 and a liner 12. When the bending stress is removed, the movable gib 8 automatically returns along the fixed gib 9. Therefore, since the gap between the movable gib 8 and the fixed gib 9 is maintained appropriately over the entire range of the lifting stroke of the slide 6, the lifting movement of the slide 6 is accurately guided in the vertical direction, and the machining accuracy of the press is maintained well. .

"Effects of the Invention" As is clear from the above description, according to the present invention, the movable gib is provided corresponding to the direction in which the bending stress to which the slide is subjected is large, so that the gap between the column and the fixed gib is reduced to It can be kept almost constant regardless of the presence or absence of. Therefore, it is possible to reliably guide the slide up and down, prevent deterioration in processing accuracy, and improve product accuracy. In addition, since the column is not deformed by deformation due to bending stress of the slide, wear on the Rolide gib can be reduced and fatalities can be avoided. In other words, since no forced contact occurs between the slide gibs, it is suitable for high-speed operation of the press. Practical effects and benefits such as α is thick ν111

[Brief explanation of the drawing]

FIG. 11 is a front view of the main parts of the press according to the embodiment, and FIG. 2 is a sectional view taken along the line -■ in FIG. 1. 1 is press, 2 is bed, 3 is column, 4 is crown,
5 is a tie rod, 6 is a slide, 7 is a point portion, 8 is a movable gib, 9 is a fixed gib, 10 is a sliding pad, 11 is a gib holding pin, 12 is a liner, 13 is a liner, and 14 is a holding pin. Patent Applicant Aig Engineering Co., Ltd. Representative Meeting 1) Keinosuke

Claims (1)

[Claims] In a slide guide for a press having a tie-rod frame structure, the slide guide is provided vertically along the front and rear surfaces of the four corners of the slide over almost the entire height of the slide, and faces outward in the left-right and front-back directions of the press. a movable gib having a protruding orthogonal sliding surface; a gib holding pin that penetrates the vertical center of the movable gib in the front-rear direction and holds the movable gib so that it can slide and rotate; and the sliding of the movable gib. A slide guide for a press, comprising: a concave orthogonal sliding surface facing the surface having a predetermined length in the vertical direction, and a fixed gib provided on each column.