JPH07164078A - Free ball bearing of plate working machine - Google Patents

Abstract

PURPOSE:To reduce noise and not to damage a ball by constituting a main ball, small ball, mounting base composing a free ball bearing with a synthetic resin. CONSTITUTION:A free ball bearing 10 is constituted so that a flange part 13a is arranged at both sides or the outer periphery upper part of a mounting base 13 and the main body of a lower mounting base 13 is inserted into the mounting part arranged on the table upper face, is fixed. A half spherical recessed part 13c is formed on the center of the mounting base 13, a small balls 14.14... are arrayed to an extent to approximately cover the surface of recessed part 13c, a large diameter main ball 15 is placed on the small balls 14.14... so as to be arranged free to rotate in the recessed part 13c. An edge part 13d is formed at the upper part of mounting base 13 so that the main ball does not easily go out. Further, the mounting base 13, small ball 14, main ball 15 are respectively composed of a synthetic resin, for example polyurethane.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a free ball bearing arranged on a table in a plate material processing machine such as a punch press.

[0002]

2. Description of the Related Art Conventionally, a punch press table has a center fixed, and left and right side tables can be moved back and forth. A cross slide is arranged at a front end of the side table, and a work holder is placed on the cross slide. Place it
The work holder is configured to hold a work. Then, the work held by the work holder is conveyed on the table and stopped at a predetermined position to carry out the punching process.However, when the work is conveyed, the work is conveyed between the lower surface of the work and the upper surface of the table. Since it is delivered while slipping, there is a risk of scratches and friction resistance etc. also occurs.Therefore, a large number of free ball bearings are arranged on the table so that the work can be easily transported on the table top. It was.

[0003]

The free ball bearing arranged on the table is mainly made of metal, and is rotatably supported by exposing the upper part of the rolling element made of steel balls. Then, the work was received at the top of the work so that it could be moved back and forth and left and right.However, since the components of the free ball bearing are made of metal, when the work was placed on the table, The sound and the noise when moving on the table were loud, and it was sometimes damaged due to friction etc. during the movement. Also, because the rolling resistance of the rolling elements is reduced and an oil-impregnated felt is attached so as to maintain that state, lubrication is required, so periodic maintenance is required, and when sliding on the table, rolling is required. The moving body had oil streaks on the back.

[0004]

The problems to be solved by the present invention are as described above. Next, the means for solving the problems will be described. That is, in a large number of free ball bearings arranged on the upper surface of a table of a plate material processing machine, the main balls, the small balls, and the mounting base forming the free ball bearings are made of synthetic resin.

[0005]

[Operation] Next, the operation will be described. By using the above means, when the work is placed on the table, the work is held by the work holder and the table is moved, the impact on the free ball bearing is small and the friction coefficient is small, so that it is easy. It can be moved, noise is reduced, and the weight of the free ball bearing itself can be reduced.

[0006]

Next, an embodiment of the present invention will be described. FIG. 1 is a plan view of a punch press equipped with the free ball bearing of the present invention, and FIG. 2 is a front sectional view of the free ball bearing of the present invention.

Referring to the structure of a punch press P as a plate material processing machine in FIG. 1, a center table 2 is arranged on the front part of the lower frame 1, and side tables 3L and 3R are arranged on both sides of the center table 2. The side tables 3L and 3R are arranged so as to be slidable back and forth on rails 7 and 7 provided in the front-rear direction on the lower frame 1. Supports 4 are laterally installed on the front portions of the side tables 3L and 3R so that both side tables 3L and 3R can slide at the same time, and rails are arranged on the rear surface of the support 4,
The cross slide 5 is arranged so as to be slidable right and left on the rail by a drive motor M provided on one side of the support body 4. Further, work holders 6, 6 for sandwiching a work such as a plate material are arranged at the rear portion of the cross slide 5, and the work sandwiched by the work holders 6, 6 can be moved to any left or right position by sliding the cross slide 5. The side tables 3L and 3R can be moved to any desired position by moving the side tables 3L and 3R back and forth.

A lower turret is arranged at the rear part of the center table 2 and a large number of dies (lower dies) are mounted along the outer periphery thereof, and an upper turret 9 is arranged above the lower turret so as to match the die of the lower turret. Upper turrets are mounted facing each other, the lower turret and the upper turret 9 are simultaneously rotated to select a desired die and punch, and the ram 11 arranged on the front part of the upper turret 9 is moved up and down. The work can be processed.

A large number of free ball bearings 10, 10, ... Of the present invention are arranged on the upper surfaces of the center table 2 and the side tables 3L, 3R, respectively, at regular intervals. The work sandwiched in the table can be easily transported on the table without damaging it.

As shown in FIG. 2, the structure of the free ball bearing 10 is such that flanges 13a are provided on both sides of the mounting base 13 or on the upper part of the outer periphery thereof, and the main body of the lower mounting base 13 is mounted on the mounting part provided on the upper surface of the table. I am trying to insert and fix it. A hemispherical recess 13c is formed on the center of the mounting base 13, and a small ball 14.1 is formed in the recess 13c.
Are arranged side by side so as to substantially cover the surface of the recess 13c, and a large-diameter main ball 15 is placed on the small balls 14, 14 ...
An edge 13d is formed on the upper portion of the mounting base 13 so that the main ball 15 does not easily come out of the recess 13c.

The mounting base 13, the small balls 14, and the main balls 15 of the free ball bearing 10 thus constructed are all made of synthetic resin such as polyurethane or polyacetal (trade name of DURACON). In other words, when all of them are made of metal as in the conventional case, the noise during movement of the work was large, but by making them of resin, it is possible to reduce the noise and reduce it by several decibels. . Also, if the main ball of the free ball bearing is a steel ball and the work material is a mild steel material, an aluminum material, or a mirror-finished work, and if this work is pressed against the table and moved, the contact surface of the work will be damaged. Although a dent was formed, it is not damaged even when the work is similarly moved using the all-resin free ball bearing 10 of the present invention. Further, in the case of the free ball bearing made of metal, one was 100 to 150 g, but it is possible to reduce the weight to about 50 g by using a synthetic resin,
Normally, about 200 pieces are used on the table, so that the weight of the table can be reduced, the side tables 3L and 3R can be easily moved, and the responsiveness can be improved.

[0012]

Since the present invention is constructed as described above, it has the following effects. That is, since the free ball bearing is made of synthetic resin, noise can be significantly reduced as compared with the conventional one, and the work is not damaged by the free ball bearing when the work is moved. , It is not necessary to supply lubricating oil or to provide oil-impregnated felt,
Maintenance free. Further, by changing the material from metal to synthetic resin, the weight can be reduced, the weight of the table can be reduced, and the responsiveness of movement of the table can be improved.

[Brief description of drawings]

FIG. 1 is a plan view of a punch press equipped with a free ball bearing of the present invention.

FIG. 2 is a front sectional view of a free ball bearing of the present invention.

[Explanation of symbols]

 P Punch press 2 Center table 3 Side table 10 Free ball bearing 13 Mounting base 14 Small ball 15 Main ball

Claims (1)

[Claims] 1. A plate material processing machine characterized in that, in a large number of free ball bearings arranged on the upper surface of a table of the plate material processing machine, main balls, small balls, and mounting bases constituting the free ball bearing are made of synthetic resin. Free ball bearings.