KR20140012470A

KR20140012470A - Brake apparatus for spindle of lathe

Info

Publication number: KR20140012470A
Application number: KR1020120079436A
Authority: KR
Inventors: 김명수
Original assignee: 현대위아 주식회사
Priority date: 2012-07-20
Filing date: 2012-07-20
Publication date: 2014-02-03

Abstract

According to the present invention, by clamping the entire circumferential direction of the brake disc using a cylinder piston, not only the clamping force can be increased but also the warp of the brake disc can be prevented. As for the main spindle brake device of the shelf which can ensure the clearance of the
When the power is applied, the spindle is installed inside the built-in motor that generates the rotational power and the chuck is fixed at one end thereof, the sliding guide fixed at the other end of the spindle, and the sliding guide The brake disc is splined to the outer circumferential surface, the first stopper and the second stopper which are respectively spaced apart from both sides of the brake disc, and the brake disc is provided between the first stopper and the brake disc. It comprises a cylinder piston for clamping the, a first spring provided between the cylinder piston and the second stopper, and a second spring provided between the brake disk and the second stopper.

Description

Brake apparatus for spindle of lathe}

The present invention relates to a spindle brake device of a lathe, and more specifically, to clamp the entire circumferential direction of the brake disc using a cylinder piston, to increase the clamping force and to prevent the distortion of the brake disc. It relates to a spindle spindle brake device of the shelf that can be used to accurately maintain the clearance between the brake disc and the stopper by using the elastic force of the spring.

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.

In the lathes described above, the lathes are used to cut short workpieces with large diameters and are used for cutting short workpieces with large diameters, such as face lathes and ordinary lathes. It is a lathe with a taper-cutting device and a relieving device, and a lathe that can be installed on a workbench with a tabletop shelf that mainly processes small parts such as watch parts and sewing machine parts. The chuck is installed vertically on the ground for easy processing of workpieces and irregular workpieces, and the tracer is installed on the model or template by using a vertical lathe that is convenient for mounting or detaching workpieces and an automatic copying device. And the tracer moves, the bytes move together to automatically form parts with the same shape as the model or template. Ball mill which mimics that there are shelves and shelves of the turret lathe, for mass production of components simple to install and fit a variety of tools to process using a rotary tool turret called for.

It is necessary to stop the spindle for milling and drilling operations in lathes, in which brake devices are used to stop the spindle.

1 is an installation configuration diagram of a spindle brake device of a conventional lathe.

As shown in FIG. 1, the structure of a spindle brake of a conventional lathe is installed inside a built-in motor 1 that generates rotational power when power is applied, and a chuck 3 for fixing a workpiece at one end thereof. A pair of brake pads for clamping the spindle 2 provided, the brake disk 4 fixedly attached to the other end of the spindle 2, and both surfaces of a part of the brake disk 4 described above. 5a, 5b, a spring 6 provided between the brake pads 5a, 5b, and a hydraulic supply unit 7 for supplying hydraulic pressure for operating the brake pads 5a, 5b; And a spacer 8 for adjusting the positions of the brake pads 5a and 5b.

The operation of the spindle brake device of the conventional lathe by the above-described configuration is as follows.

When power is applied, rotational power is generated from the built-in motor 1 to rotate the spindle 2 connected to the inside of the built-in motor 1. One end of the spindle (2) is provided with a chuck (3) so that the workpiece is fixed so that the work of the workpiece is made. In this case, the brake disc 4 fixed to the spindle 2 also rotates. In addition, the brake pads 5a and 5b are spaced apart by the elastic force of the spring 6 so that the brake disk 4 can be smoothly rotated.

When it is necessary to stop the main shaft for milling and drilling operations, when hydraulic pressure is supplied through the hydraulic pressure supply unit 7, a pair of brake pads 5a and 5b which are kept at a constant interval by the elastic force of the spring 6 As the gap is narrowed by hydraulic pressure, the clamping of the brake disc 4 stops the rotation of the spindle 2 connected to the brake disc 4.

When the stationary spindle 2 is to be rotated again, the brake pads 5a and 5b unclamp the brake discs 4 by the restoring force of the spring 6 by stopping the hydraulic pressure supplied from the hydraulic pressure supply unit 7. Do it.

However, in the conventional lathe spindle brake device as described above, since the brake pad clamps only a part of the circumferential direction of the brake disc, not only the clamp force is relatively weak, but also a degree change may occur due to the distortion of the brake disc. There is a problem.

In addition, since the spindle brake device of a conventional lathe adjusts the position of the brake pad using a spacer, there is a problem that it is difficult to adjust the disk brake and the brake pad so as to maintain a constant gap.

An object of the present invention is to solve the conventional problems as described above, by using a cylinder piston to clamp the entire circumferential direction of the brake disk can not only increase the clamping force but also to prevent distortion of the brake disk. It is possible to provide a spindle brake device of a lathe.

It is another object of the present invention to provide a spindle brake device of a lathe capable of accurately maintaining a clearance between a brake disc and a stopper by using an elastic force of a spring.

As a means for achieving the above object, the configuration of the present invention is a spindle that is installed inside a built-in motor that generates rotational power when a power is applied, and a spindle having a chuck for fixing a workpiece at one end thereof; A sliding guide fixed to the other end, a brake disc splined to an outer circumferential surface of the sliding guide, a first stopper and a second stopper respectively spaced apart from both surfaces of the brake disc, A cylinder piston provided between the first stopper and the brake disc to clamp the brake disc, a first spring provided between the cylinder piston and the second stopper, and the brake disc and the second stopper. It is preferable to include a second spring provided between the.

In the configuration of the present invention, the cylinder piston is preferably clamped over the entire circumferential direction of the brake disc.

It is preferable that the above-described brake disc is slidably moved along the axial direction of the spindle on the outer circumferential surface of the sliding guide.

In the configuration of the present invention, the first stopper and the second stopper described above preferably limit the sliding movement distance of the brake disc.

According to the present invention, by clamping the entire circumferential direction of the brake disc using a cylinder piston, not only the clamping force can be increased but also the warp of the brake disc can be prevented. It has an effect, which allows the gap of the to be maintained accurately.

1 is an installation configuration diagram of a spindle brake device of a conventional lathe.
2 is an installation configuration diagram of a spindle brake device of a lathe according to an embodiment of the present invention.
3 is a cross-sectional configuration diagram of a sliding guide and a brake disc of a spindle brake device of a lathe according to an embodiment of the present 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.

2 is an installation configuration diagram of a spindle brake device of a lathe according to an embodiment of the present invention.

As shown in Figure 2, the configuration of the spindle brake device of the lathe according to an embodiment of the present invention is installed inside the built-in motor 11 that generates rotational power when the power is applied to the workpiece at one end The inner circumferential surface is spline-coupled to the spindle 12 in which the chuck 13 to be fixed is installed, the sliding guide 19 fixed to the other end of the spindle 12, and the outer circumferential surface of the sliding guide 19. Brake disc 14, the first stopper 17a and the second stopper 17b which are provided on both sides of the brake disc 14, respectively, and the first stopper 17a and the brake disc described above. A first piston (14) installed between the cylinder piston (15) for clamping the brake disc (14) and between the cylinder piston (15) and the second stopper (17b). 16) and the above brake d And a second spring 18 provided between the scaffold 14 and the second stopper 17b.

The cylinder piston 15 has a structure that clamps the entire circumferential direction of the brake disc 14.

The first stopper 17a and the second stopper 17b are spaced apart from both surfaces of the brake disc 14 so that the sliding stop distance of the brake disc 14 is limited.

As illustrated in FIG. 3, the sliding guide 19 and the brake disc 14 of the spindle brake of the lathe according to an embodiment of the present invention have an inner circumferential surface of the brake disc 14 on the outer circumferential surface of the sliding guide 19. It is composed of a spline-coupled structure. As the sliding guide 19 and the brake disc 14 are spline-coupled as described above, the brake disc 14 is configured to be slidably moved along the axial direction of the spindle 12 on the outer circumferential surface of the sliding guide 19. .

With the above configuration, the operation of the spindle brake device of the lathe according to the embodiment of the present invention is as follows.

When power is applied, rotational power is generated from the built-in motor 11 to rotate the spindle 12 connected to the built-in motor 11. One end of the spindle 12 is provided with a chuck 13 so that the workpiece is fixed so that the work of the workpiece is made. In this case, the sliding guide 19 fixed to the spindle 12 and the brake disc 14 splined to the sliding guide 19 also rotate together. In addition, since the cylinder piston 15 is spaced apart from the second stopper 17b by the elastic force of the first spring 16, the brake disc 14 may be smoothly rotated.

In the case where it is necessary to stop the main shaft for milling and drilling operations, when hydraulic pressure is supplied to the cylinder piston 15, the brake disc 14 and the second stopper 17b and the brake disk 14 are driven by the elastic force of the first spring 16. The cylinder piston 15, which has been kept at a constant interval, clamps the brake disc 14 to stop the rotation of the sliding guide 19 and the spindle 12 connected to the brake disc 14. In this case, the above-described cylinder piston 15 can clamp not only the clamp force by clamping the entire circumferential direction of the brake disc 14, but also prevent the distortion of the brake disc.

When the stationary spindle 12 is to be rotated again, the cylinder piston 15 unclamps the brake disc 14 by the restoring force of the first spring 16 by stopping the hydraulic pressure supplied to the cylinder piston 15. Do it.

11: built-in motor 12: spindle
13: Chuck 14: brake disc
15: cylinder piston 16, 18: first spring
17a, 17b: stopper 19: sliding guide

Claims

The spindle is installed inside the built-in motor which generates the rotational power when the power is applied, and the spindle is installed with the chuck to fix the workpiece at one end.
A sliding guide fixedly installed at the other end of the spindle, a brake disc having an inner circumferential surface splined to an outer circumferential surface of the sliding guide,
First and second stoppers spaced apart from both surfaces of the brake disc, respectively;
A cylinder piston installed between the first stopper and the brake disc to clamp the brake disc;
A first spring provided between the cylinder piston and the second stopper;
And a second spring provided between the brake disc and the second stopper.

The method of claim 1,
The cylinder piston brake of the lathe, characterized in that the clamp is clamped over the entire circumferential direction of the brake disc.

The method of claim 1,
The brake disk is a spindle brake device of the shelf, characterized in that the sliding movement along the axial direction of the spindle on the outer peripheral surface of the sliding guide.

The method of claim 3, wherein
The first stopper and the second stopper is a spindle brake device of the shelf, characterized in that to limit the sliding movement distance of the brake disc.