KR20130084148A - Clamping device for table of machining center - Google Patents

Abstract

PURPOSE: A table clamp apparatus for a machining center is provided to observe inside the same from outside, thereby identifying a gap and run-out between a clamp disk and an expansion sleeve. CONSTITUTION: A table clamp apparatus for a machining center includes a table (1), a shaft (2), a rotator holder (3), a rotator (4), a stator (5), a frame (6), a bearing (7), and a clamp disk (8). A work-piece is put on the table. The shaft is connected to the lower side of the table, and is a rotational shaft for rotating the table. The rotator holder is coupled to the side of the shaft. The rotator is installed inside the rotator holder. The stator is installed with being separated from the rotator, and forms a motor together with the rotator. The stator is installed at the frame. The bearing is installed between the shaft and the stator holder. The clamp disk is fixed to the lower side of the shaft.

Description

Clamping device for table of machining center

The present invention relates to a table clamp device of a machining center, and more specifically, it is possible to visually observe the inside from the outside to check the gap and runout between the clamp disc and the expansion sleeve, and to expand the expansion sleeve without disassembling other parts. And the support for disassembly and assembly, so that the repair and repair are relatively easy, and the expansion sleeve and the support are located separately from the bearings, so that the table clamp device of the machining center does not affect the table due to the displacement caused by the clamping operation. It is about.

A machine used for machining a metal or non-metal material to a shape and dimensions using appropriate tools, or for finer machining of a semi-finished material by various cutting or non-cutting methods is called a machine tool. Among the above-mentioned machine tools, a machine tool in which chips are generated in the machining process is called a cutting machine tool, and a non-cutting machine tool in which chips are not generated in a machining process is called a metal machining machine. The above-mentioned cutting machine tools include a lathe, a milling machine, a machining center, a drilling machine, a boring machine, a grinding machine, a gear processing machine, and a special processing machine. The metal forming machine includes a mechanical press, Bending machines, stair machines, and drawing machines.

The automation and numerical control (NC) of the cutting machining field is also rapidly progressing owing to the tendency of the industry as a whole. In recent years, a multi-function machining center has emerged as a result of the combined numerical control (NC) of the machine tool which has been divided into a rotary type milling system and a rotary type machining system. It is rapidly expanding.

The above-mentioned machining center is an NC machine tool which automatically carries out several types of cutting machining in one machine, and usually has an automatic tool changing function and a function of automatically cutting and dividing more than two sides of the workpiece. The above-mentioned machining center can be divided into two types, one for machining the entire non-circulating part and the other for machining the rotating part, regardless of where the development of the machining center is located. The machining centers for non-rotating parts have various parts modified by machining NC milling machines or NC drilling machines. Automatic tool changer (ATC), bullet magazine, automatic A machining center was created by combining an automatic loader (AL). Machining centers for rotating parts are used for various machining operations such as angle division, grooving, hole machining, tapping, etc. after turning the rotating parts with the NC lathe as the power generation base. In addition to the automatic tool changer (ATC) (AL), and the workpiece is held by a separately prepared chuck during processing, and the processed workpiece is released from the chuck, thereby automating the detachment of the workpiece.

The table of the machining center on which the workpiece is placed is clamped by hydraulic pressure.The technology that clamps the clamping of the circumferential surface of the support ring fixed to the table to minimize the number of parts and simplify the processing and assembly Shinan Publication No. 1995-0010510 (December 18, 1995) discloses a "clamp device for a rotary table in a machining center."

However, the above-described conventional table clamp device of a machining center has a problem in that it is impossible to visually observe the inside from the outside, so that the gap and runout with the clamp disc cannot be confirmed.

In addition, the conventional table clamp device of the machining center has a problem that it is difficult to replace and repair the clamp disk, and the expansion sleeve is difficult to disassemble and disassemble unless other components are disassembled.

SUMMARY OF THE INVENTION An object of the present invention is to solve the conventional problems as described above, and it is possible to visually observe the inside from the outside, so that the clamp disk and the gap between the expansion sleeve and the runout can be confirmed, and the table clamp of the machining center To provide a device.

It is another object of the present invention to provide a table clamp device for a machining center, in which replacement and repair are relatively easy by disassembling the expansion sleeve and the support without disassembling other parts.

It is a further object of the present invention to provide a table clamp device of a machining center in which the expansion sleeve and the support are located separately from the bearing so that they do not affect the table due to the displacement due to the clamping operation.

As a means for achieving the above object, the configuration of the present invention includes a table on which a workpiece is to be placed, a shaft connected to a lower portion of the table and serving as a rotation axis for rotating the table, and A rotator holder coupled to a side of the shaft, a rotator mounted in the rotator holder, a stator installed separately from the rotator and constituting a motor together with the rotator, a frame on which the stator is mounted, and A bearing mounted between the shaft and the stator holder, a clamp disk fixedly coupled to the lower portion of the shaft, an expansion sleeve provided with a gap on the outer circumferential surface of the clamp disk, and a support coupled with the expansion sleeve. And, installed in the lower portion of the expansion sleeve and the support using a bolt It is preferable to include a lower cover coupled to the frame.

In the structure of the present invention, the shaft, the clamp disk, the expansion sleeve, the support, and the lower cover are preferably formed with a hollow portion, so that the gap and the runout between the clamp disk and the expansion sleeve can be visually observed from the outside.

In the configuration of the present invention, it is preferable that the hydraulic sleeve is formed between the expansion sleeve and the support, and the hydraulic seal is maintained using the seal.

The configuration of the present invention is preferable if the lower cover is removed, and the assembly of the expansion sleeve and the assembly of the sleeve is possible.

In the configuration of the present invention, the expansion sleeve is made of an elastic material.

The configuration of the present invention is advantageous if the expansion sleeve and the support are located separately from the bearing so that they do not affect the table due to displacement due to the clamping operation.

In the present invention, the inside can be visually observed from the outside, so that the gap between the clamp disc, the expansion sleeve and the runout can be checked, and the expansion sleeve and the support can be disassembled and replaced without disassembling other parts. The repair is relatively easy, and the expansion sleeve and the support are located separately from the bearings so that they do not affect the table due to the displacement due to the clamping operation.

1 is a cross-sectional configuration diagram of a table clamp device of a machining center according to an embodiment of the present invention.
2 is a cross-sectional view of an assembly of an expansion sleeve and a support of a table clamp device of a machining center according to one embodiment of the invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention. Other objects, features, and operational advantages, including the purpose, operation, and effect of the present invention will become more apparent from the description of the preferred embodiments.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory only and are not to be construed as limiting the scope of the invention as disclosed in the accompanying claims. It is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and similarities, many of which are within the scope of the present invention. In addition, the terms or words used in the specification and claims herein should not be construed as being limited to the ordinary or dictionary meanings, and the inventors should properly explain the concept of terms in order to best explain their invention in the best way. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

1 is a cross-sectional configuration diagram of a table clamp device of a machining center according to an embodiment of the present invention.

As shown in FIG. 1, the configuration of a table clamp device of a machining center according to an embodiment of the present invention is connected to a table 1 on which a workpiece is placed and a lower portion of the table 1. A shaft 2 serving as a rotating shaft for rotating the table 1, a rotator holder 3 coupled to a side surface of the shaft 2 using bolts 3a, and The rotator 4 mounted in the rotator holder 3, the stator 5 which is installed separately from the rotator 4 and constitutes a motor together with the rotator 4, and the stator 5 is mounted. The frame 6, the bearing 7 mounted between the shaft 2 and the stator holder 6, and a clamp fixedly coupled to the lower portion of the shaft 2 by using a bolt 8a. Installed at a gap between the disk 8 and the outer circumferential surface of the clamp disk 8 described above. The expansion sleeve 9, the support 10 coupled to the expansion sleeve 9, and the expansion sleeve 9 and the support 10 is installed on the lower portion of the frame (11) using a bolt (11a) And a lower cover 11 coupled with 6).

The shaft 2, the clamp disk 8, the expansion sleeve 9, the support 10, and the lower cover 11 all have hollow portions, so that the gap between the clamp disk 8 and the expansion sleeve and run out Can be observed with the naked eye from the outside.

2 is a cross-sectional view of an assembly of an expansion sleeve and a support of a table clamp device of a machining center according to one embodiment of the invention.

As shown in FIG. 2, the expansion sleeve 9 and the support 10 of the table clamp device of the machining center according to the embodiment of the present invention have a hydraulic working space formed therebetween, using a seal 10a. Maintain a hydraulic seal.

The expansion sleeve 9 is made of an elastic material.

When the lower cover 11 is removed, it is easy to disassemble and assemble the above-mentioned assembly of the expansion sleeve 9 and the sleeve 10, so that replacement and repair are relatively easy.

With the above configuration, the operation of the table clamp device of the machining center according to the embodiment of the present invention is as follows.

When power is applied to the stator 5 and the rotator 4 constituting the motor, the rotator 4 rotates by the magnetic force, and the rotational force of the rotator 4 passes through the rotator holder 3 to the shaft 2. The table 1 is rotated by being transmitted.

When the rotational movement of the table 1 is to be completed and clamped, when the hydraulic force acts on the hydraulic working space between the expansion sleeve 9 and the support 10, the expansion sleeve 9 made of elastic material is It expands within the elastic limit towards the clamp disk 8 and the support 10 supports the reaction force due to the expansion of the expansion sleeve 9.

As the expansion sleeve 9 expands and comes into contact with the clamp disk 8, the clamp force is generated and stopped as the clamp disk 8 is subjected to a surface pressure.

In this case, the expansion sleeve 9 and the support 10 are located separately from the bearing 7 so that they do not affect the table 1 due to the displacement due to the clamping operation.

1: table 2: shaft
3: rotator holder 4: rotator
5: stator 6: frame
7: bearing 8: clamp disc
9: expansion sleeve 10: support
11: lower cover

Claims (6)

The table on which the workpiece is placed,
A shaft connected to the lower part of the table and serving as a rotating shaft for rotating the table;
Rotator holder coupled to the side of the shaft,
A rotator mounted in the rotator holder;
A stator installed separately from the rotator and constituting a motor together with the rotator;
A frame on which the stator is mounted;
A bearing mounted between the shaft and the stator holder;
Clamp disk is fixedly coupled to the lower portion of the shaft,
An expansion sleeve provided with a gap on an outer circumferential surface of the clamp disc;
A support coupled with the expansion sleeve,
And a lower cover installed at the lower portion of the expansion sleeve and the support and coupled to the frame using bolts. The method of claim 1,
The shaft, the clamp disk, the expansion sleeve, the support, and the lower cover have hollow portions, so that the gap and the runout between the clamp disk and the expansion sleeve can be visually observed from the outside. . The method of claim 1,
Hydraulic expansion space is formed between the expansion sleeve and the support, the table clamp device of the machining center, characterized in that to maintain the sealed state of the hydraulic by using a seal. The method of claim 1,
Removing the lower cover, the table clamp device of the machining center, characterized in that disassembly and assembly of the assembly of the expansion sleeve and the sleeve. The method of claim 1,
The expansion sleeve is a table clamp device of a machining center, characterized in that made of an elastic material. The method of claim 1,
The expansion sleeve and the support is located separately from the bearing does not affect the table due to the displacement due to the clamping operation, the table clamp device of the machining center.

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