Universal CNC machining jig base

Abstract

The utility model discloses a universal CNC (Computer Numerical Control) processing jig base which comprises a base and a fixing mechanism which is detachably connected with the base and is used for fixing the base on CNC equipment, the base comprises a base plate, a positioning mechanism and a plurality of supporting columns, the positioning mechanism is arranged at the upper end of the base plate and used for positioning a jig, the supporting columns are arranged at the upper end of the base plate at intervals, the top faces of all the supporting columns are located at the same horizontal position, after the jig is positioned by the positioning mechanism, the top faces of the supporting columns abut against the bottom face of the jig, and the jig is located on the base plate. When the jig is replaced, only different jigs need to be placed on the base, the positioning mechanism in the base is connected with the positioning sleeve of the jig to realize positioning, the time for replacing, fixing and calibrating is saved, the base can be universally used for various jigs with two positioning holes in the bottom die, and the working efficiency can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of processing equipment, and specifically relates to a universal CNC processing fixture base. Background Art

[0002] Laptop shells, aluminum alloy power supply shells and other workpieces all need to be processed by CNC, and jigs are essential tools used to fasten workpieces during CNC processing to keep them in the correct relative position. In actual production, different jigs are designed and manufactured according to different products. Since the processing jigs for different products are not universal, different jigs need to be replaced on the CNC machine when processing products. From replacing jigs, installing jigs to the final calibration, a lot of manpower and material resources are consumed, resulting in low production efficiency. Utility Model Content

[0003] In view of the technical problem that in the prior art, different jigs need to be replaced on the CNC machine platform when processing different products, and the replacement, installation and calibration will consume a lot of manpower and material resources, thereby affecting the processing efficiency, the utility model provides a universal CNC processing jig base.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A universal CNC machining jig base comprises a base and a fixing mechanism detachably connected to the base for fixing the base on a CNC device, wherein the base comprises a substrate, a positioning mechanism disposed on the upper end of the substrate for positioning the jig, and a plurality of support columns disposed on the upper end of the substrate and arranged at intervals, wherein the top surfaces of all the support columns are at the same horizontal position, and when the positioning mechanism positions the jig, the top surfaces of the support columns abut against the bottom surface of the jig.

[0006] Furthermore, the plurality of fixing mechanisms are respectively located on both sides of the substrate, and the fixing mechanisms include a fixing plate capable of pressing the upper end of the substrate, a fixing hole provided on the fixing plate, and a fixing bolt capable of connecting the fixing hole to the CNC device.

[0007] Furthermore, the fixing plate includes a lower fixing whose bottom surface can be abutted against the CNC equipment and an upper fixing fixedly connected to the top surface of the lower fixing, the fixing hole and the fixing bolt are both located on the upper fixing, and when the upper fixing is screwed to the CNC equipment, the bottom surface of the upper fixing presses the substrate on the top surface of the substrate.

[0008] Furthermore, the fixing hole is a strip-shaped hole, and the length of the strip-shaped hole extends horizontally along the transverse direction of the upper fixing.

[0009] Furthermore, the positioning mechanism includes two positioning platforms arranged at intervals and screwed on the top surface of the substrate, a first positioning column and a second positioning column respectively fixed to the top ends of the two positioning platforms, a cylindrical pin fixed to the top end of the first positioning column, and a chamfered pin fixed to the top end of the second positioning column, the top ends of the first positioning column and the second positioning column each having a variable cross-section portion, the variable cross-section portion being a variable cross-section structure with a cross-sectional area gradually decreasing from one end to the other opposite end, wherein the end with the smallest cross-sectional area is the top end of the variable cross-section portion.

[0010] Furthermore, all of the support columns include a connecting platform screwed to the upper end of the substrate, a column body protruding integrally from the top surface of the connecting platform in a direction away from the connecting platform, and a supporting platform fixed to the top of the column body, and the outer diameter of the supporting platform is larger than the outer diameter of the column body.

[0011] Furthermore, all of the support columns are provided with a vacuum detection mechanism, which includes a vacuum detection cavity provided on the top surface of the support column and recessed toward the interior of the support column, a sealing ring provided on the top surface of the support column and capable of surrounding the cavity opening of the vacuum detection cavity, a vacuum connecting hole provided on the side wall of the support column and capable of communicating with the vacuum detection cavity, and a vacuum pump connected to the vacuum connecting hole through an air pipe, the vacuum detection cavity is electrically connected to a vacuum sensor, the vacuum sensor is electrically connected to a controller, and the controller is electrically connected to an alarm and the vacuum pump.

[0012] Furthermore, the top surface of the support column is provided with an annular groove surrounding the cavity opening of the vacuum detection cavity, and the sealing ring is embedded in the annular groove.

[0013] In summary, the beneficial effects of the utility model are as follows: 1. The bottom surface is provided with two positioning holes and various jigs used for processing different products. After being connected to the positioning holes by cylindrical pins and chamfered pins, the bottom surface of the bottom mold is against the top surface of the support column, and the top surface of the support column is at the same horizontal position. The jig has a heavy weight and has been positioned by the pins. Under the support of the jig's own weight, the jig can be stably and firmly fixed on the base. Moreover, various jigs do not need to be connected to the CNC machine, which saves time for disassembly and calibration of the position. It has strong versatility and practicality, saves manpower and material resources, and can improve processing efficiency. 2. When fixing the jig, if it is not put in place, for example, the jig is crooked, after the vacuum pump is started, the vacuum detection chamber must be a non-negative pressure environment. Therefore, the vacuum sensor senses the vacuum degree of the vacuum detection chamber, which cannot meet the requirements. The controller controls the alarm to remind the staff to adjust the position of the jig to reduce the occurrence of erroneous operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of the bottom mold of the jig used in CNC machining.

[0015] Figure 2 It is a schematic diagram of the structure in which the fixture is loaded on the base.

[0016] Figure 3 The utility model is a structural schematic diagram of a universal CNC machining fixture base.

[0017] Figure 4 It is a three-dimensional structural schematic diagram of the base in the utility model.

[0018] In the figure, 100-jig, 110-bottom mold, 120-positioning sleeve, 121-positioning hole, 130-cover plate, 200-base plate, 300-fixing mechanism, 310-fixing plate, 311-lower fixation, 312-upper fixation, 320-fixing hole, 330-fixing bolt, 400-positioning mechanism, 410-positioning platform, 420-first positioning column, 430-second positioning column, 440-cylindrical pin, 450-chamfered pin, 460-variable cross-section part, 500-support column, 510-connecting platform, 520-column, 530-support platform, 531-annular groove, 600-vacuum detection chamber, 600A-vacuum connecting hole, 700-CNC machine. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with specific drawings.

[0020] See also Figure 1 The fixture 100 includes a bottom die 110 and a cover plate 130 detachably connected to the bottom die 110. The bottom die 110 is provided with two spaced mounting holes, each of which is screwed with a positioning sleeve 120, and the positioning sleeve 120 is provided with a positioning hole 121 that communicates with the interior of the fixture 100. In addition, in order to fix the fixture 100 with the CNC machine 700, different fixtures 100 in the past all have a positioning sleeve 120 on the bottom die 110 of the fixture 100, and two positioning holes 121 are provided.

[0021] See also Figure 3 The utility model provides a universal CNC machining fixture base, including a base and a fixing mechanism 300 detachably connected to the base for fixing the base on the CNC equipment. The base includes a base plate 200, a positioning mechanism 400 disposed on the upper end of the base plate 200 for positioning the fixture 100, and a plurality of support columns 500 disposed on the upper end of the base plate 200 and arranged at intervals, and the top surfaces of all the support columns 500 are at the same horizontal position. When the positioning mechanism 400 positions the fixture 100, the top surface of the support column 500 abuts against the bottom surface of the fixture 100. Please refer to Figure 2The substrate 200 is placed on the CNC machine 700, and the substrate 200 is fixed on the CNC machine 700 by the fixing mechanism 300 that can be connected to the CNC machine 700. The fixture 100 is placed on the upper end of the base, and the fixture 100 is positioned by the positioning mechanism 400, and the top surface of the support column 500 is the support surface in contact with the bottom mold 110 of the fixture 100. The multiple support columns 500 distributed at intervals are at the same horizontal position and abut against the bottom surface of the bottom mold 110 of the fixture 100. Since the fixture 100 is usually made of metal material and has a heavy weight, the fixture 100 that has been positioned by the positioning mechanism 400 can be smoothly fixed on the upper end of the base under the support of its very heavy weight. When replacing the jig 100, one only needs to place a different jig 100 on the base, and use the positioning mechanism 400 in the base to connect with the positioning sleeve 120 of the jig 100 to achieve positioning, so as to complete the jig interchange, saving the time of replacement, fixation and calibration. In addition, the base can be used for various jigs 100 with two positioning holes 121 in the bottom mold 110, which helps to improve work efficiency.

[0022] The plurality of fixing mechanisms 300 are respectively located on both sides of the substrate 200, and the fixing mechanisms 300 include a fixing plate 310 that can be pressed on the upper end of the substrate 200, a fixing hole 320 provided on the fixing plate 310, and a fixing bolt 330 that can connect the fixing hole 320 to the CNC device. After the fixing bolt 330 is inserted into the fixing hole 320, it is screwed with the screw hole on the CNC machine 700 itself, which is convenient for disassembly and assembly.

[0023] The fixing plate 310 includes a lower fixing 311 whose bottom surface can be against the CNC equipment and an upper fixing 312 fixedly connected to the top surface of the lower fixing 311. The fixing hole 320 and the fixing bolt 330 are both located on the upper fixing 312. When the upper fixing 312 is screwed with the CNC equipment, the bottom surface of the upper fixing 312 presses the substrate 200 on the top surface of the substrate 200. After the upper fixing 312 and the lower fixing 311 are connected, an L-shaped pressing part is formed, which is convenient for the upper fixing 312 to press and fix. The fixing hole 320 is a strip hole, and the length of the strip hole extends horizontally along the transverse direction of the upper fixing 312. The long strip hole vertically penetrates the L-shaped pressing part, and the long strip hole can be used to adjust the connection position of the fixing plate 310 and the CNC machine 700 according to actual conditions.

[0024] The positioning mechanism 400 includes two positioning platforms 410 arranged at intervals and screwed on the top surface of the substrate 200, a first positioning column 420 and a second positioning column 430 respectively fixed to the top of the two positioning platforms 410, a cylindrical pin 440 fixed to the top of the first positioning column 420, and a chamfered pin 450 fixed to the top of the second positioning column 430. The cylindrical pin 440 and the chamfered pin 450 are respectively inserted into the two positioning holes 121 of the bottom mold 110, and a two-hole positioning fixture 100 is used, and one is a cylindrical pin 440 and the other is a chamfered pin 450, which can reduce the pin diameter to avoid over-positioning of the fixture 100.

[0025] The top ends of the first positioning column 420 and the second positioning column 430 each have a variable cross-section portion 460, and the variable cross-section portion 460 is a variable cross-section structure with a gradually decreasing cross-sectional area from one end to the other opposite end, wherein the end with the smallest cross-sectional area is the top end of the variable cross-sectional portion 460. The end with the smallest cross-sectional area is provided with a cylindrical pin 440 or a chamfered pin 450, and when connected with the positioning hole 121, the area at the connection position is the smallest, so that after the cylindrical pin 440 or the chamfered pin 450 is inserted, interference of the connection end face is avoided, so that the end face with the smallest cross-sectional area can smoothly enter the installation hole of the bottom mold 110 and abut against the positioning sleeve 120.

[0026] See also Figure 4 All the support columns 500 include a connecting platform 510 screwed to the upper end of the substrate 200, a column 520 integrally protruding from the top surface of the connecting platform 510 in a direction away from the connecting platform 510, and a supporting platform 530 fixed to the top of the column 520. The outer diameter of the supporting platform 530 is larger than the outer diameter of the column 520, and the outer diameter of the connecting platform 510 is larger than the outer diameter of the column 520. The outer diameters of the two supporting contact positions are relatively large, and the support is more stable and firm.

[0027] All the support columns 500 are provided with a vacuum detection mechanism, which includes a vacuum detection chamber 600 provided on the top surface of the support column 500 and recessed toward the inside of the support column 500, a sealing ring (not shown in the figure) provided on the top surface of the support column 500 and capable of surrounding the cavity opening of the vacuum detection chamber 600, a vacuum connection hole 600A provided on the side wall of the support column 500 and capable of communicating with the vacuum detection chamber 600, and a vacuum pump (not shown in the figure) connected to the vacuum connection hole 600A through an air pipe. The top surface of the support column 500 is provided with an annular groove 531 surrounding the cavity opening of the vacuum detection chamber 600, and the sealing ring is embedded in the annular groove 531, and the top surface of the sealing ring can be higher than the top surface of the support column 500. The vacuum detection chamber 600 is electrically connected to a vacuum sensor (not shown in the figure), the vacuum sensor is electrically connected to a controller, and the controller is electrically connected to an alarm and the vacuum pump. When the fixture 100 is placed in the correct position and is not skewed, the vacuum pump is started, the sealing ring contacts the fixture 100, and a vacuum negative pressure environment is formed in the vacuum detection chamber 600, which has a certain adsorption and fixing effect on the fixture 100. The vacuum sensor is used to detect the vacuum degree of all vacuum detection chambers 600. If the requirement is not met, a signal is sent to the controller, and the controller controls the alarm to alarm and remind the staff. Because the fixture 100 is not placed in place, the vacuum detection chambers 600 of each support column 500 are not all negative pressure environments, and the position of the fixture 100 needs to be adjusted before subsequent processing.

[0028] This base: 1. The bottom surface is provided with two positioning holes 121 and various jigs 100 used for processing different products. After being connected to the positioning holes 121 by the cylindrical pins 440 and the chamfered pins 450, the bottom surface of the bottom mold 110 is against the top surface of the support column 500, and the top surface of the support column 500 is at the same horizontal position. The jig 100 has a heavy weight and has been positioned by the pins. Under the support of the jig 100's own weight, the jig 100 can be stably and firmly fixed on the base. Moreover, various jigs 100 do not need to be connected to the CNC machine 700, which saves time for disassembly and calibration. It has strong versatility and practicality, saves manpower and material resources, and can improve processing efficiency. Second, when the fixture 100 is fixed, if it is not placed in place, for example, the fixture 100 is tilted, after the vacuum pump is started, the vacuum detection chamber 600 must be a non-negative pressure environment. Therefore, the vacuum sensor senses that the vacuum degree of the vacuum detection chamber 600 cannot meet the requirements, and the controller controls the alarm to remind the staff to adjust the position of the fixture 100 to reduce the occurrence of erroneous operations.

[0029] The above are only implementation methods of the present utility model, and are not intended to limit the patent scope of the present utility model. Any equivalent structure made using the contents of the specification and drawings of the present utility model, directly or indirectly used in other related technical fields, are also within the patent protection scope of the present utility model.

Claims

1. A universal CNC machining fixture base, characterized by: It includes a base and a fixing mechanism detachably connected to the base for fixing the base on a CNC device, the base includes a substrate, a positioning mechanism disposed on the upper end of the substrate for positioning a fixture, and a plurality of support columns disposed on the upper end of the substrate and arranged at intervals, the top surfaces of all the support columns are at the same horizontal position, and when the positioning mechanism positions the fixture, the top surfaces of the support columns are against the bottom surface of the fixture.

2. A universal CNC machining fixture base according to claim 1, characterized in that: The plurality of fixing mechanisms are respectively located on both sides of the substrate, and the fixing mechanisms include a fixing plate capable of pressing the upper end of the substrate, a fixing hole provided on the fixing plate, and a fixing bolt capable of connecting the fixing hole with the CNC device.

3. A universal CNC machining fixture base according to claim 2, characterized in that: The fixing plate includes a lower fixing whose bottom surface can be abutted against the CNC equipment and an upper fixing fixedly connected to the top surface of the lower fixing. The fixing hole and the fixing bolt are both located on the upper fixing. When the upper fixing is screwed to the CNC equipment, the bottom surface of the upper fixing presses the substrate on the top surface of the substrate.

4. The universal CNC machining fixture base according to claim 3, characterized in that: The fixing hole is a strip-shaped hole, and the length of the strip-shaped hole extends horizontally along the transverse direction of the upper fixing.

5. The universal CNC machining fixture base according to claim 1, characterized in that: The positioning mechanism includes two positioning platforms arranged at intervals and screwed on the top surface of the substrate, a first positioning column and a second positioning column respectively fixed to the top ends of the two positioning platforms, a cylindrical pin fixed to the top end of the first positioning column, and a chamfered pin fixed to the top end of the second positioning column. The top ends of the first positioning column and the second positioning column each have a variable cross-section portion, and the variable cross-section portion is a variable cross-section structure with a gradually decreasing cross-sectional area from one end to the other opposite end, wherein the end with the smallest cross-sectional area is the top end of the variable cross-section portion.

6. The universal CNC machining fixture base according to claim 1, characterized in that: All the support columns include a connecting platform screwed to the upper end of the base plate, a column body protruding integrally from the top surface of the connecting platform in a direction away from the connecting platform, and a supporting platform fixed to the top end of the column body, wherein the outer diameter of the supporting platform is larger than the outer diameter of the column body.

7. A universal CNC machining fixture base according to any one of claims 1 to 6, characterized in that: All of the support columns are provided with a vacuum detection mechanism, which includes a vacuum detection cavity provided on the top surface of the support column and recessed toward the inside of the support column, a sealing ring provided on the top surface of the support column and capable of surrounding the cavity opening of the vacuum detection cavity, a vacuum connecting hole provided on the side wall of the support column and capable of communicating with the vacuum detection cavity, and a vacuum pump connected to the vacuum connecting hole through an air pipe, the vacuum detection cavity is electrically connected to a vacuum sensor, the vacuum sensor is electrically connected to a controller, and the controller is electrically connected to an alarm and the vacuum pump.

8. The universal CNC machining fixture base according to claim 7, characterized in that: The top surface of the support column is provided with an annular groove surrounding the cavity opening of the vacuum detection cavity, and the sealing ring is embedded in the annular groove.

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