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KR-102963224-B1 - Apparatus for Rotating High Precision of 180° Dual Table

KR102963224B1KR 102963224 B1KR102963224 B1KR 102963224B1KR-102963224-B1

Abstract

The present invention relates to a rotating device for rotating a 180° dual table, which places and fixes a workpiece in a machine tool, by high-precision hydraulic control, comprising: a table (101) installed to rotate left and right around a shaft (110) installed in the center of a main body (102); a piston (130) having a rack gear (131) formed on one side that meshes with a pinion gear (111) coupled to the center of the shaft (110); a first cylinder (120) into which one side of the piston (130) is inserted; a second cylinder (121) into which the other side of the piston (130) is inserted; a hydraulic line block (150) installed at the lower front of the table (101) to supply hydraulic pressure to the first cylinder (120) and the second cylinder (121); and a first dog (140) fixedly coupled to the front lower part of the table (101) and opening and closing a first flow control valve (160). It includes: a second dog (141) fixedly coupled to the lower rear end of the table (101) and opening and closing the second flow control valve (170); a first flow control valve (160) installed on the hydraulic line block (150) and opening and closing the hydraulic pressure upon contact with the first dog (140); a second flow control valve (170) installed on the hydraulic line block (150) and opening and closing the hydraulic pressure upon contact with the second dog (141); a first speed control valve (190) installed on the side of the hydraulic line block (150) and controlling the movement speed of the hydraulic pressure within the second cylinder (121); and a second speed control valve (192) installed on the side of the hydraulic line block (150) and controlling the movement speed of the hydraulic pressure within the first cylinder (120).

Inventors

  • 이정호
  • 이재홍

Assignees

  • 주식회사 성산암데코

Dates

Publication Date
20260511
Application Date
20241118

Claims (5)

  1. A table (101) installed to rotate left and right around a shaft (110) installed in the center of the main body (102); A piston (130) having a rack gear (131) formed on one side that meshes with a pinion gear (111) coupled to the center of the shaft (110); A first cylinder (120) into which one side of the above piston (130) is inserted; A second cylinder (121) into which the other end of the above piston (130) is inserted; A hydraulic line block (150) installed at the lower front of the table (101) to supply hydraulic pressure to the first cylinder (120) and the second cylinder (121); A first dog (140) fixedly coupled to the front lower part of the table (101) and opening and closing the first flow control valve (160); A second dog (141) fixedly coupled to the lower rear end of the table (101) and opening and closing the second flow control valve (170); A first flow control valve (160) installed on the above hydraulic line block (150) to open and close hydraulic pressure upon contact with the first dog (140); A second flow control valve (170) installed on the above hydraulic line block (150) to open and close hydraulic pressure by contact with the second dog (141); A first speed control valve (190) installed on the side of the above hydraulic line block (150) to control the movement speed of the hydraulic pressure in the second cylinder (121); A high-precision rotating device for a 180° dual table, comprising: a second speed control valve (192) installed on the side of the hydraulic line block (150) to control the movement speed of the hydraulic pressure in the first cylinder (120).
  2. In claim 1, the first flow control valve (160) and the second flow control valve (170) are, A body (161, 171) having a hydraulic inlet/outlet hole (169, 179) formed on one side, and A cover (163, 173) coupled to one side of the above body (161, 171), and An operating shaft (164, 174) inserted into an operating hole (162, 172) formed through the center of the body (161, 171) and cover (163, 173), and having a groove (165, 175) formed for hydraulic pressure to enter and exit, and A pin (167, 177) is coupled to the end of the above-mentioned operating shaft (164, 174) to a roller (166, 176) that contacts the dog (140, 141), and A high-precision rotating device for a 180° dual table, each comprising a spring (168, 178) that elastically supports the above-mentioned operating shafts (164, 174).
  3. A high-precision rotating device for a 180° dual table, further comprising a positioning pin assembly (200) configured on one side of the main body (102) to determine the position of the table (101) in claim 1.
  4. A high-precision rotating device for a 180° dual table, wherein, in claim 1, it further comprises a clamp (112) installed inside the main body (102) to hydraulically fix or release the shaft (110) from the side of the shaft (110).
  5. A high-precision rotating device for a 180° dual table, further comprising, in claim 1, a first position checking sensor (180) installed on one side of the hydraulic line block (150) and operated by a first dog (140), and a second position checking sensor (182) installed on the other side of the hydraulic line block (150) and operated by a second dog (141).

Description

High-precision rotating apparatus for a 180° dual table The present invention relates to a high-precision rotating device for a 180° dual table, and more specifically, to a rotating device for rotating a 180° dual table that places and fixes a workpiece in a machine tool using high-precision hydraulic control. Generally, a machine tool is a machine that manufactures various types of machines. Important parts of machines are produced through cutting, plastic deformation, and electrical processing methods. While any machine that performs such processing can be called a machine tool, the term is often used to refer specifically to metal cutting machine tools. In this case, plastic deformation machine tools are called metalworking machines. Additionally, an object processed by a machine tool is called a workpiece. Furthermore, index tables, which have been used for the purpose of rotating workpieces in industrial machinery, have utilized motor-driven devices or rack gear systems to rotate the table. For example, the rack gear system rotates the table using the rotation ratio of gears and has been widely used for low-speed applications rather than high-speed ones; to increase the rotation ratio of the gears used in the rack gear system, a lubrication device has been used to increase the rotational force to ensure smooth table rotation. In rack gear index tables, when the table is rotated after the first machining process or after the second machining process, if the speed exceeds the limit, excessive force is applied due to gravitational acceleration during rotation, causing the rotational force to operate at a value greater than the given value and generating errors. Additionally, because the contact area increases due to the gear system, the friction load increases, shortening the lifespan of the machine. Moreover, there are limitations on the table's rotation direction, rotational speed, concentrated cutting load, and load capacity. In addition, since a separate lubrication pump must be installed to drive the lubrication device formed on the sliding surface of the table used in the rack gear system, it was not possible to prevent the volume of the index table from increasing due to the increase in peripheral devices. Furthermore, the rack gear system index table not only caused a decrease in work efficiency due to frequent breakdowns of peripheral devices, but also had the problem of increased costs because it was an expensive device that relied solely on imports. FIG. 1 is a plan view showing a high-precision 180° dual table rotation device as an embodiment according to the present invention. FIG. 2 is a planar cross-sectional view of a high-precision 180° dual table rotation device according to the present invention. FIG. 3 is a side cross-sectional view of a high-precision 180° dual table rotation device according to the present invention. FIG. 4 is a plan cross-sectional view showing a flow control valve in a high-precision 180° dual table rotation device according to the present invention. FIG. 5 is a side cross-sectional view showing a positioning pin assembly in a high-precision 180° dual table rotation device according to the present invention. FIG. 6 is a hydraulic circuit diagram schematically showing the operation of a high-precision 180° dual table rotation device according to the present invention. FIG. 7 is a plan view showing the operation of a dog and a flow control valve in a high-precision 180° dual table rotation device according to the present invention. Hereinafter, an embodiment of a high-precision rotation device for a 180° dual table according to the present invention will be described in detail with reference to the attached drawings. First, in FIG. 1, a processing device (1), such as an industrial machine or machine tool that moves along one or more of the X-axis, Y-axis, and Z-axis, is equipped with a 180° dual table (101) that can place and fix a workpiece to be processed for various processing operations. A rotating device (100) is installed on this 180° dual table (101) that can rotate the workpiece to be processed. The rotating device (100) is used to maximize the convenience and efficiency of processing operations using the processing device (1) by enabling various processing operations to be performed while rotating at a predetermined angle, such as 360 degrees or 180 degrees. In FIGS. 2 and 3, the table (101) is installed to rotate left and right around a shaft (110) installed in the center of the main body (102). The table (101) is fixedly installed on the main body (102) and is coupled to the end of the shaft (110) so as to rotate together with the rotation of the shaft (110). A plurality of fixing holes or fixing members may be formed on the surface of the table (101) to fix various workpieces. A rack gear (131) is formed on one side of the piston (130) and meshes with a pinion gear (111) coupled to the center of the shaft (110). One side of the piston (130) is inserted in