KR102086785B1 - Index table for machine tool - Google Patents

Abstract

The present invention relates to an index table for a machine tool. An index table for a machine tool according to an embodiment of the present invention includes a table base provided with an internal space; A rotary table rotatably installed on an upper portion of the table base, on which a workpiece to be processed through a machine tool is mounted; It is installed in the inner space, is installed in the center of the rotary table and the lower shaft is formed in the lower end of the table shaft, the shaft is installed on the table shaft to support it and the rotary table is installed on the upper and hypoid gear is provided at the lower A spindle module including a spindle; A drive module installed at a side surface of the table base and including a drive pinion meshing with the hypoid gear and a servo motor axially connected to the drive pinion to rotate the rotary table; And a housing installed in the inner space, a lower cubic coupling disposed inside the housing and having a lower flange disposed at the center thereof, and spaced apart from the lower cubic coupling through a fluid supplied between the lower cubic coupling. And supply the fluid to the upper and lower portions of the upper cubic coupling and the upper cubic coupling disposed above the lower flange, respectively, to couple the upper cubic coupling to the lower cubic coupling to stop the table shaft, and the upper cubic coupling. It includes a brake module including a fluid supply line to float.

Description

Index table for machine tools {INDEX TABLE FOR MACHINE TOOL}

The present invention relates to a machine tool. More specifically, it relates to an index table for a machine tool for performing a continuous operation such as machining, conveying, packing, or testing a workpiece.

A machine tool is a device used to process a workpiece, and in recent years, a variety of composite machines capable of processing workpieces of various processes in a single machine have been developed and used.

That is, a complex machine including a turning center, a machining center, a swiss turn, an electrical discharge machine, a boring machine, a CNC lathe, for example, a precision gear processing, a spline machining, Workpieces of various processes, such as spiral screws, impellers and cams, can be processed in multiple processes on a single machine.

On the other hand, the machine tool is provided with an index table for processing the workpiece. Such an index table includes a rotary table driven through a worm gear or a bevel gear and a synchronization axis with a machine tool, for example, and effectively performs a continuous operation in the machine tool such as machining, conveying, packing, and testing a workpiece. I can do it.

In this case, the index table needs to be rotated as fast as possible without error and minimizes vibration and noise at high speed, and can prevent leakage. The problem is to prevent backlash of the rotary table and excessive injury in the rotation process.

However, the index table according to the prior art driven through a worm gear or a bevel gear has an indexing accuracy of about 30 seconds, and cannot be processed at a high speed that should be rotated to less than 20 seconds, and solves the backlash and injury of the rotating table. I can't.

Republic of Korea Utility Model Registration Publication No. 20-0312265

SUMMARY OF THE INVENTION An object of the present invention is to provide an index table for a machine tool that can not only easily improve the index splitting accuracy but also prevent the backlash of the rotary table in a double manner, and which can stop the rotary table quickly and prevent injury. have.

In order to solve the above problems,

An index table for a machine tool according to an embodiment of the present invention includes a table base provided with an internal space;

A rotating table rotatably installed on an upper portion of the table base, on which a workpiece processed through a machine tool is mounted;

The table shaft is accommodated in the inner space, installed in the center of the rotary table and the lower flange (Flange) is formed at the lower end, the sleeve (Sleeve) and the rotary table is installed on the table shaft to support it A spindle module including a spindle installed at an upper portion and having a hypoid gear at a lower portion thereof;

A drive module installed at a side surface of the table base and including a drive pinion meshing with a hypoid gear and a servo motor which is connected to the drive pinion to be axially connected to rotate the rotary table. Module); And

A housing provided in the inner space, a lower cubic coupling installed inside the housing and having a lower flange disposed at a central portion thereof, and a lower portion supplied through a fluid supplied between the lower cubic coupling; An upper cubic coupling installed spaced apart from the cubic coupling and disposed above the lower flange, and supplying fluid to the upper and lower portions of the upper cubic coupling, respectively, to couple the upper cubic coupling to the lower cubic coupling to stop the table shaft. And a rubber supply line or a Teflon pad attached to the lower part of the upper cubic coupling to float the upper cubic coupling and the lower flange when the upper cubic coupling descends. Brake module (Brake Module) including a shock absorbing member for cushioning the impact of;

It may include.

In addition, in the index table for a machine tool according to an embodiment of the present invention, the sleeve is a first sleeve disposed on an upper portion of the lower flange, a second sleeve disposed on the upper portion of the first sleeve and the second sleeve It is composed of a third sleeve disposed on the upper, it can be integrated through a fastening bolt penetrating the first, second, third sleeve.

In addition, the index table for a machine tool according to an embodiment of the present invention, the oil circulation line is formed in the longitudinal direction arranged in the sleeve, in communication with the outside to supply oil between the table shaft and the sleeve;

It may further include.

In addition, in the index table for a machine tool according to an embodiment of the present invention, the servo motor and the drive pinion are interconnected through a coupling, the motor housing (Motor Housing) on the side of the table base to surround and protect the coupling ) Can be installed.

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In addition, in the index table for a machine tool according to an embodiment of the present invention, the fluid supply line is formed in the housing in communication with the outside, the fluid is supplied to the upper portion of the upper cubic coupling to lower the upper cubic coupling A first fluid supply line to the; And

A second fluid supply line formed across the table shaft and the sleeve and configured to communicate with the outside to supply a fluid between the upper and lower cubic couplings to raise the upper cubic coupling;

It may include.

Such a solution will become more apparent from the detailed description for carrying out the following invention based on the accompanying drawings.

Prior to this, the terms or words used in this specification and claims should not be construed in the usual and dictionary sense, and the inventors will be required to properly define the concepts of terms in order to best describe their invention. On the basis of the principle that it can be interpreted as meaning and concept corresponding to the technical idea of the present invention.

According to one embodiment of the present invention, the hypoid gear and the driving pinion can easily improve the index division accuracy of the rotary table and prevent backlash of the rotary table. In addition, through the upper cubic coupling, as well as a quick stop of the rotary table, it is possible to prevent backlash double. Therefore, high precision and high precision workpiece processing is possible.

On the other hand, according to an embodiment of the present invention, not only maintenance is easy through the split sleeve, but also oil can be easily supplied between the table shaft and the sleeve through an oil circulation line, thereby effectively improving the rotational support force. .

In addition, according to an embodiment of the present invention, the coupling between the drive pinion and the servo motor is protected by the motor housing, thereby preventing the ingress of foreign substances generated during workpiece machining, and thus is effective for maintenance. .

1 is a perspective view showing an index table for a machine tool according to an embodiment of the present invention.
Figure 2 is a perspective view showing a cut part of the index table for a machine tool according to an embodiment of the present invention.
Figure 3 is a perspective view showing a combination of the spindle module and the drive module of the index table for a machine tool according to an embodiment of the present invention.
Figure 4 is a cross-sectional view showing an index table for a machine tool according to an embodiment of the present invention.

Specific aspects and specific technical features of the present invention will become more apparent from the following detailed description and embodiments related to the accompanying drawings. In the present specification, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used to refer to the same components, even if displayed on different drawings. In addition, in describing one embodiment of the present invention, when it is determined that the detailed description of the related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

In addition, in describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only to distinguish the components from other components, and the nature, order, order, etc. of the components are not limited by the terms. If a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected to or connected to that other component, but there may be another configuration between each component. It is to be understood that the elements may be "connected", "coupled" or "connected".

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in Figures 1 to 4, the index table 1 for the machine tool according to an embodiment of the present invention is formed of a polyhedron, for example, the table base 11 and the table base 11 is provided with an internal space (10a) It is rotatably installed in the upper portion of the upper surface is divided through a split groove 21 formed radially on the upper surface, and includes a rotary table 20 on which a workpiece to be processed through a machine tool is mounted. In addition, a table shaft 31 installed at the center of the rotary table 20, a sleeve 32 for supporting the rotation of the table shaft 31, and a rotary table 20 are installed at an upper portion thereof, and a hypoid gear 34 at a lower portion thereof. It includes a spindle module 30 including a spindle (33) is provided.

In addition, the index table 1 for the machine tool is installed on the side of the table base 11, the shaft is connected to the drive pinion 41 and the drive pinion 41 meshing with the hypoid gear 34, and interlocked, It includes a drive module 40 including a servo motor 42 for rotationally driving the rotary table 20 and a brake module 50 for stopping the table shaft 31 and preventing injury.

Here, the table base 11 and the rotation table 20 of the index table 1 are well known in the art, and can be easily implemented without specific description. Hereinafter, the spindle module 30 and the driving module ( 40) and the brake module 50 will be described in advance.

The spindle module 30 is rotatably installed in the center of the rotary table 20, the table shaft 31, the sleeve 32 is axially installed on the outside of the table shaft 31, the rotary table 20 Spindle 33 is installed in the lower portion of the configuration.

The table shaft 31 has an upper flange 31a formed at an upper end thereof and is fixedly installed at the center of the rotary table 20 through the upper flange 31a to interlock the rotary table 20 with a lower portion at a lower end thereof. The flange 31b is formed to stop the driving of the brake module 50 to stop the rotation driving of the rotary table 20.

Here, foreign matters such as chips generated during the workpiece machining process penetrate between the upper flange 31a of the table shaft 31 and the rotary table 20 to enter the gap between the sleeve 32 and the table shaft 31 to prevent surface scratches. O-Ring may be interposed to prevent it from acting as a trigger.

The sleeve 32 is axially installed on the outside of the table shaft 31 and supports rotation thereof by interposing oil between the table shaft 31 and the table shaft 31. This sleeve 32 may be composed of a single or a plurality.

For example, the plurality of sleeves 32 may include a first sleeve 32a disposed above the lower flange 31b, a second sleeve 32b disposed above the first sleeve 32a, and the second sleeve. It may be composed of a third sleeve (32c) disposed on the upper portion of (32b). In addition, the first, second, and third sleeves 32a, 32b, and 32c may be integrated through the fastening bolts 32d sequentially passing through them. Such a plurality of sleeves 32 can be replaced only one of the end of life is effective in terms of maintenance.

In addition, the sleeve 32 is an oil circulation line 35 is formed in communication with the outside along the longitudinal direction to supply and discharge the oil between the table shaft 31, the table shaft to rotate at high speed ( 31 is easily supported.

The oil circulation line 35 may be, for example, a pair of pairs to supply and discharge oil, or may be divided into upper and lower portions to supply and discharge oil.

Here, oil seals may be installed on the upper and lower portions of the sleeve 32 to prevent leakage of oil supplied and discharged through the oil circulation line 35, and may be hermetically sealed.

The spindle 33 is a rotary table 20 is installed on the upper, hypoid gear 34 is provided at the bottom. Here, the hypoid gear 34 is one of the gears used in the field requiring high power and high torque, and is commercialized by being applied to, for example, a precision reducer, a vehicle, and a mechanical power transmission device.

These hypoid gears 34 have difficulty in precise centering and processing between sides, but are capable of high torque transmission without increasing the outer diameter of the spiral gears, and worm gears. It has higher efficiency, higher reduction ratio than bevel gear, and is effective in preventing backlash.

Therefore, according to one embodiment of the present invention, by rotating the rotary table 20 through the hypoid gear 34 and the drive pinion 41, it is possible to easily improve the index partitioning precision of the rotary table 20 In addition, the backlash of the rotary table 20 can be prevented, so that highly accurate and high precision workpiece processing is possible.

On the other hand, the drive module 40 according to an embodiment of the present invention is installed and operated on the side of the table base 11, the drive pinion 41 is disposed on the lower portion of the spindle 33 hypoid gear 34 ) And the servo pin 42 is axially coupled to the drive pinion 41 to rotate the rotary table 20.

The servo motor 42 and the drive pinion 41 may be interconnected through, for example, a coupling 43, and the outer surface of the coupling 43 is wrapped in the motor housing 44 to protect the workpiece. Foreign matter such as chips generated in the process can be prevented from penetrating into the coupling 43 to extend its life.

The brake module 50 is installed in the inner space 10a of the table base 11 to stop by pressing the lower flange 31b of the table shaft 31, thereby preventing the double backlash and simultaneously preventing the table shaft 31. A quick stop is possible.

The brake module 50 has a housing 51 accommodated and installed in an inner space 10a, and an upper cubic coupling 53 and a lower cubic coupling 52 are spaced apart from each other in the housing 51. As the upper cubic coupling 53 moves up and down with the fluid supplied through the fluid supply line 54, for example, air or hydraulic oil, the table shaft 31 is stopped while being coupled or separated from the lower cubic coupling 52. .

In addition, the brake module 50 is provided at the lower portion of the upper cubic coupling 53 to lower the lower flange 31b when the upper cubic coupling 53 descends through the fluid supplied through the fluid supply line 54. The shock absorbing member 55 may further include a shock absorbing member 55 to prevent vibration and noise.

The buffer member 55 may be easily implemented by attaching a rubber pad or a Teflon pad to the lower portion of the upper cubic coupling 53.

Curvic Coupling is a coupling developed by Grison, USA. The number of teeth is about 20 to 360. Its high-load transmission or self-alignment allows precision division of aircraft and industrial gas turbines. Is being applied to.

The lower cubic coupling 52 composed of such a cubic coupling is installed inside the housing 51 such that the lower flange 31b is disposed at the center thereof. The upper cubic coupling 53 is spaced apart from the upper cubic coupling 52 to be disposed above the lower flange 31b.

The upper cubic coupling 53 floats through the fluid supplied between the lower cubic coupling 52 and the upper cubic coupling 53 through the fluid supply line 54 to be spaced apart from the lower cubic coupling 52. Therefore, the rotational drive of the table shaft 31 is normally possible.

On the contrary, if the fluid supplied between the lower cubic coupling 52 and the upper cubic coupling 53 through the fluid supply line 54 is externally discharged and the fluid is supplied to the upper portion of the upper cubic coupling 53. The upper cubic coupling 53 is lowered to engage the lower cubic coupling 52 to press the lower flange 31b of the table shaft 31 to rotate to stop the backlash, thereby simultaneously preventing the backlash. The table shaft 31 can be stopped quickly, and further, the floating prevention of the table shaft 31 can be prevented.

Here, the fluid supply line 54 for supplying the fluid to the upper cubic coupling 53 raises the first fluid supply line 54a and the upper cubic coupling 53 to lower the upper cubic coupling 53. It may be composed of a second fluid supply line (54b).

That is, the first fluid supply line 54a is formed by puncturing the housing 51 in communication with the outside, and is formed on the upper cubic coupling 53 to supply fluid to the upper cubic coupling 53. Will be lowered. The second fluid supply line 54b is formed through the table shaft 31 and the sleeve 32 by communicating with the table shaft 31 and the sleeve 32, respectively, and is formed in communication with the outside to form an upper portion. A fluid is supplied between the cubic coupling 53 and the lower cubic coupling 52 to raise the upper cubic coupling 53.

Therefore, according to an embodiment of the present invention, by pressing the lower flange 31b of the table shaft 31 through the upper cubic coupling 53 which is elevated through the fluid supply line 54, as a result, the table shaft The rotation drive of the 31 and the rotation table 20 can be stopped quickly, and furthermore, the backlash generated during the stop after the rotation drive can be prevented twice as well as an excessive injury can be prevented during the rotation process. It is effective in terms of operational safety of the table (1).

Although the present invention has been described in detail through one embodiment, this is for describing the present invention in detail, and the index table for the machine tool according to the present invention is not limited thereto. The terms "comprise", "comprise", or "have" described above mean that a corresponding component may be included unless specifically stated otherwise, and therefore, excluding other components is excluded. Rather, it should be construed that it may further include other components, all terms including technical or scientific terms are to be generally understood by one of ordinary skill in the art unless otherwise defined Has the same meaning as

In addition, the above description is merely illustrative of the technical idea of the present invention, and those skilled in the art may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by the one embodiment. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

1-index table 10-table base
10a-Interior 20-Rotating Table
21-Split groove 30-Spindle module
31-Table Shaft 31a-Upper Flange
31b-Lower Flange 32-Sleeve
32a-first sleeve 32b-second sleeve
32c-3rd sleeve 32d-tightening bolt
33-Spindle 34-Hypoid Gear
35-Oil Circulation Line 40-Drive Module
41-Drive Pinion 42-Servo Motor
43-coupling 44-motor housing
50-Brake Module 51-Housing
52-Lower cubic coupling 53-Upper cubic coupling
54-fluid supply line 54a-first fluid supply line
54b-2nd fluid supply line 55-buffer member

Claims (6)

A table base of a polyhedron having an internal space;
A rotary table rotatably installed on an upper portion of the table base, the upper surface of which is divided by a split groove formed radially on an upper surface thereof, and on which a workpiece processed through a machine tool is mounted;
It is installed in the inner space, the table shaft is installed in the center of the rotary table, the lower flange is formed at the lower end, the shaft is installed on the table shaft to support it, and the rotary table is installed on the upper side and the hypoid gear at the bottom A spindle module including a provided spindle;
A drive module installed at a side surface of the table base and including a drive pinion meshed with a hypoid gear and a servo motor axially connected to the drive pinion to rotate and rotate the rotary table; And
A housing accommodated in the inner space, a lower cubic coupling disposed inside the housing and having a lower flange disposed at a center thereof, and spaced apart from the lower cubic coupling through a fluid supplied between the lower cubic coupling and the lower cubic coupling; The upper cubic coupling disposed on the upper part of the flange, the fluid is supplied to the upper and lower parts of the upper cubic coupling, respectively, and the upper cubic coupling is coupled to the lower cubic coupling to stop the table shaft and lift the upper cubic coupling. A brake module comprising a fluid supply line and a rubber pad or a teflon pad attached to a lower portion of the upper cubic coupling to cushion a shock with a lower flange when the upper cubic coupling descends;
Including;
The fluid supply line is formed in the housing in communication with the outside, the first fluid supply line for supplying a fluid to the upper portion of the upper cubic coupling to lower the upper cubic coupling; And
A second fluid supply line formed across the table shaft and the sleeve and configured to communicate with the outside to supply a fluid between the upper and lower cubic couplings to raise the upper cubic coupling;
Index table for the machine tool comprising a.
The method according to claim 1,
The sleeve includes a first sleeve disposed on an upper portion of a lower flange, a second sleeve disposed on an upper portion of the first sleeve, and a third sleeve disposed on an upper portion of the second sleeve. Index table for machine tools integrated through fastening bolts through sleeves.
The method according to claim 1 or 2,
An oil circulation line formed along the length direction of the sleeve and communicating with the outside to supply and discharge oil between the table shaft and the sleeve;
Index table for machine tools further comprising.
The method according to claim 1,
The servo motor and the drive pinion are interconnected through a coupling, the index table for a machine tool installed on the side of the table base to protect the coupling to the coupling.
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