PCB milling cutter outer circle accurate grinding machining equipment

Abstract

The utility model discloses accurate grinding equipment for the outer circle of a PCB milling cutter, and relates to the technical field of milling cutter machining. The device comprises a workbench, a linear module, a cross beam, a first positioning pipe and a second positioning pipe, a magnet is fixed to the inner end of the first positioning pipe, and an arc-shaped rubber mat is fixed to the inner wall of the second positioning pipe; the bottoms of the two linear modules are jointly and movably connected with a cross beam, a main shaft is rotationally connected into each second bearing seat, an air cylinder is fixed to the top of the cross beam, an auxiliary shaft is rotationally connected into each third bearing seat, belt wheels are fixed to the peripheries of the main shafts and the peripheries of the auxiliary shafts, and all the belt wheels are jointly sleeved with an accurate grinding abrasive belt. Through the arrangement of the workbench, the shaft rod, the first positioning pipe, the second positioning pipe, the cross beam, the main shaft, the auxiliary shaft, the accurate grinding abrasive belt and the air cylinder, the problems that stable clamping and positioning are difficult to carry out when the outer circle of the PCB milling cutter is accurately ground, and when the outer circle of the PCB milling cutter is accurately ground, accurate grinding cannot be rapidly carried out, large-area accurate grinding cannot be carried out, and accurate grinding of the PCB milling cutters with different inner diameters is difficult to adapt are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of milling cutter processing, in particular to a PCB milling cutter outer circle fine grinding processing equipment. Background Art

[0002] PCB milling cutter, also known as gong cutter, is mainly used in the final process of PCB processing, especially when pressing and fishing the outer frame. It can effectively remove excess copper foil or insulation layer to ensure the accuracy and aesthetics of the circuit board. It is suitable for fine processing of various circuit board materials. Or it can be used as an auxiliary tool for PCB drilling to improve drilling efficiency and quality. After the production of PCB milling cutter, most of them need to be finely ground on its outer circle, but there are still the following disadvantages in the actual fine grinding process:

[0003] First of all, because PCB milling cutters are suitable for processing circuit boards, their own size and weight are very small, so when performing outer cylindrical fine grinding, how to stably clamp them is a problem. Most fixtures are not very suitable for clamping PCB milling cutters, and cannot stably and effectively perform fine grinding on the outer cylindrical surface of PCB milling cutters.

[0004] Secondly, the outer circle fine grinding of the PCB milling cutter is to continuously grind its outer circle, which requires a corresponding fine grinding disc or fine grinding belt. However, the contact surface between the conventional fine grinding disc and the outer circle of the PCB milling cutter is small, and it is easy to over-fine grind. After the PCB milling cutter is positioned, the fine grinding belt is not easy to control the movement and contact with the PCB milling cutter. It is also difficult to apply it to PCB milling cutters of various inner diameters for fine grinding, and the fine grinding process speed is slow. Utility Model Content

[0005] The utility model aims to provide a PCB milling cutter outer cylindrical fine grinding processing equipment, which solves the problems that it is difficult to stably clamp and position the PCB milling cutter during outer cylindrical fine grinding, and that it is impossible to quickly perform fine grinding, unable to perform fine grinding over a large area, and difficult to adapt to fine grinding of PCB milling cutters with different inner diameters during outer cylindrical fine grinding of the PCB milling cutter by arranging a workbench, a shaft, a positioning tube one, a positioning tube two, a crossbeam, a main shaft, a secondary shaft, a fine grinding belt, and a cylinder.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model is a PCB milling cutter outer cylindrical fine grinding processing equipment, comprising a workbench, a linear module, a crossbeam, a positioning tube 1 and a positioning tube 2, wherein two symmetrically distributed slide grooves are provided through the workbench, and shaft rods are rotatably connected in the two slide grooves, and a slider 1 is slidably arranged in each slide groove, and a bearing seat 1 is fixed on the upper end of the two sliders, a positioning tube 1 is rotatably connected in one bearing seat 1, and a positioning tube 2 is rotatably connected in the other bearing seat 1;

[0008] A magnet is fixed to the inner end of the first positioning tube, and arc-shaped rubber pads distributed in a ring array are fixed to the inner wall of the second positioning tube;

[0009] The four corners of the top surface of the workbench are all fixed with pillars, and the tops of the two pillars on the same side of the workbench are jointly fixed with a linear module;

[0010] The bottoms of the two linear modules are movably connected to a crossbeam, and the bottom of the crossbeam is slidably connected to two sliders 2, a bearing seat 2 is fixed to the bottom of each slider 2, and a main shaft is rotatably connected in each bearing seat 2, a cylinder is fixed at the top center of the crossbeam, and the piston rod of the telescopic end of the cylinder penetrates the crossbeam downward and is fixed with an inverted Y-shaped rod, and bearing seats 3 are fixed to the two bottom ends of the Y-shaped rod, and a secondary shaft is rotatably connected in the bearing seat 3, and pulleys are fixed to the outer periphery of the main shaft and the secondary shaft, and a fine grinding belt is commonly provided on the outside of all the pulleys.

[0011] Furthermore, a positioning motor is fixed to the end of the workbench, and the output shaft of the positioning motor is fixedly connected to the end of the shaft rod; the outer circumference of the shaft rod in the two slide grooves is provided with threads, and the two sections of the threads are in opposite directions, and the slider in each slide groove is threadedly connected to the outside of the shaft rod in the slide groove.

[0012] Furthermore, a rotating motor is fixed to the upper end of the slider where the positioning tube 1 is located, and the rotating motor is located at an end of the positioning tube 1 away from the positioning tube 2, and the output shaft of the rotating motor is fixedly connected to the closed end of the positioning tube 1.

[0013] Furthermore, one end of the positioning tube 1 close to the positioning tube 2 is an open end, and the open end of the positioning tube 1 is provided with threaded ring sheets distributed in a ring array, and the external threads of the threaded ring sheets are connected with nuts.

[0014] Furthermore, a milling cutter body is inserted between the positioning tube one and the positioning tube two, and the end portion of the milling cutter body extends into the inner cavity of the positioning tube one and is fixed by magnetic attraction with a magnet, and the blade of the milling cutter body extends into the positioning tube two and contacts the inner wall of the arc-shaped rubber pad.

[0015] Furthermore, the bearing seat three is located below the bearing seat two, the secondary shaft is located below the main shaft, and the vertical portion of the Y-shaped rod is located between the two sliders two.

[0016] Furthermore, end plates are fixed to both ends of the bottom surface of the crossbeam, and connecting plates are fixed to the ends of the two bottom surfaces of the two sliders that are far away from each other, and a spring is fixed between each end plate and the connecting plate adjacent thereto.

[0017] The utility model has the following beneficial effects:

[0018] The utility model solves the problem that it is difficult to stably clamp and position the PCB milling cutter when fine grinding the outer circle of the PCB milling cutter by arranging a workbench, a shaft rod, a positioning tube one and a positioning tube two. Before fine grinding the outer circle of the PCB milling cutter, the PCB milling cutter needs to be positioned and a certain rotation effect is maintained during subsequent fine grinding. First, the end portion of the milling cutter body is inserted into the positioning tube one and fixed by adsorption with a magnet, and then the nut is rotated to the threaded ring piece, the opening of the positioning tube one is locked, and the positioning tube one is fastened to the outer circle of the milling cutter body to limit the position, and then the positioning motor rotates. Because the shaft rod is provided with threads at opposite ends, when the shaft rod rotates, two sliders one in the slide groove can be brought close to each other until the blade of the milling cutter body is inserted into the positioning tube two and squeezed into the inner cavity formed by three arc-shaped rubber pads, the blade of the milling cutter body contacts the arc-shaped rubber pad and remains stable, and then the rotating motor operates to drive the positioning tube one to rotate in the bearing seat one, and drive the positioning tube two to rotate in the bearing seat one, so that the milling cutter body is rotated to help the subsequent fine grinding process.

[0019] The utility model solves the problems that, when fine grinding the outer circle of a PCB milling cutter is processed, it is impossible to perform fine grinding quickly, it is impossible to perform fine grinding on a large area, and it is difficult to adapt to the fine grinding of PCB milling cutters with different inner diameters by arranging a crossbeam, a main shaft, a secondary shaft, a fine grinding belt, and a cylinder; the utility model is provided with a crossbeam, a main shaft, a secondary shaft, a fine grinding belt, and a cylinder; the fine grinding belt is sleeved on four pulleys, and a corresponding driving member is installed under any slider (not shown in the attached figure for the convenience of display), so as to drive any main shaft to rotate, and the remaining main shafts and secondary shafts rotate synchronously with the fine grinding belt, and cooperate with the cylinder to drive the Y-shaped rod to descend, thereby descending the secondary shaft until the fine grinding under the secondary shaft is The grinding belt contacts the outer circle of the milling cutter body, and then the fine grinding process can be carried out quickly in coordination with the rotation of the milling cutter body and the rotation of the fine grinding belt. In coordination with the work of the linear module, the fine grinding belt performs reciprocating linear displacement, thereby contacting a large amount of the outer circle part of the milling cutter body, speeding up the fine grinding process. The cylinder drive changes the height of the secondary shaft, which is suitable for the fine grinding of various inner diameter milling cutter bodies. The rotation directions of the fine grinding belt and the milling cutter body are opposite, and the fine grinding efficiency is higher. The fine grinding belt can continue to descend to cover more outer circle area of ​​the milling cutter body, increase the contact surface, and speed up the fine grinding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments are briefly introduced below.

[0021] Figure 1 A three-dimensional diagram of a PCB milling cutter external cylindrical fine grinding processing equipment;

[0022] Figure 2 This is the structural diagram after the linear module is removed;

[0023] Figure 3This is the installation drawing of the workbench, positioning tube 1 and positioning tube 2;

[0024] Figure 4 This is the installation diagram of positioning tube one;

[0025] Figure 5 is a cross-sectional view of positioning tube 1;

[0026] Figure 6 This is the installation diagram of positioning tube 2;

[0027] Figure 7 It is a structural diagram of the beam and its attached components;

[0028] Figure 8 for Figure 7 A rear-view stereogram;

[0029] Fig. 9 This is a cross-sectional connection diagram of the beam.

[0030] Reference numerals:

[0031] 1. Workbench; 101. Pillar; 102. Shaft; 103. Slide; 104. Slider 1; 105. Bearing seat 1; 106. Positioning motor; 2. Linear module; 3. Beam; 301. Cylinder; 3011. Y-shaped rod; 3012. Bearing seat 2; 302. Spindle; 303. Sub-shaft; 304. Fine grinding belt; 305. Slider 2; 3051. Bearing seat 3; 3052. Connecting plate; 306. Pulley; 307. End plate; 3071. Spring; 4. Positioning tube 1; 401. Rotating motor; 402. Nut; 403. Threaded ring; 404. Magnet; 5. Positioning tube 2; 501. Arc rubber pad; 6. Milling cutter body. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0033] See also Figure 1-9 As shown, the utility model is a PCB milling cutter outer cylindrical fine grinding processing equipment, including a workbench 1, a linear module 2, a crossbeam 3, a positioning tube 1 4 and a positioning tube 2 5. Two symmetrically distributed slide grooves 103 are provided through the workbench 1, and the two slide grooves 103 are rotatably connected with a shaft 102. A slider 104 is also slidably arranged in each slide groove 103. A bearing seat 105 is fixed on the upper end of the two sliders 104. A positioning tube 4 is rotatably connected in one bearing seat 105, and a positioning tube 2 5 is rotatably connected in the other bearing seat 105.

[0034] The workbench 1 is used as the main fine grinding processing site, and a slide groove 103 is provided inside the workbench 1, and the shaft 102 penetrates and is rotatably arranged in the slide groove 103, and a slider 1 104 is arranged in each of the two slide grooves 103, and a positioning tube 1 4 and a positioning tube 2 5 are respectively installed on the two sliders 104 by means of a bearing seat, and the positioning tube 1 4 and the positioning tube 2 5 are used to position and install the milling cutter body 6;

[0035] A positioning motor 106 is fixed to the end of the workbench 1, and the output shaft of the positioning motor 106 is fixedly connected to the end of the shaft 102; the outer circumference of the shaft 102 in the two slide grooves 103 is provided with threads, and the two sections of the threads are in opposite directions, and the slider 104 in each slide groove 103 is threadedly connected to the outside of the shaft 102 in the slide groove 103;

[0036] Because the shaft 102 is provided with two sections of threads in opposite directions, when the positioning motor 106 is working and drives the shaft 102 to rotate, the two sliders 104 will move closer to or farther away from each other. When it is necessary to clamp and position the milling cutter body 6, the two sliders 104 can be moved closer to each other.

[0037] A magnet 404 is fixed to the inner end of the positioning tube 1 4, and arc-shaped rubber pads 501 distributed in a circular array are fixed to the inner wall of the positioning tube 2 5;

[0038] One end of the positioning tube 1 4 close to the positioning tube 2 5 is an open end, and the open end of the positioning tube 1 4 is provided with threaded ring pieces 403 distributed in a ring array, and the threaded ring pieces 403 are externally threadedly connected with nuts 402;

[0039] A milling cutter body 6 is inserted between the positioning tube 1 4 and the positioning tube 2 5, and the end of the milling cutter body 6 extends into the inner cavity of the positioning tube 1 4 and is fixed by magnetic attraction with the magnet 404, and the blade of the milling cutter body 6 extends into the positioning tube 2 5 and contacts the inner wall of the arc-shaped rubber pad 501;

[0040] When positioning the milling cutter body 6, the end of the milling cutter body 6 is inserted into the positioning tube 1 4 and fixed with the magnet 404, and then the nut 402 is rotated to the outside of the threaded ring piece 403 until the threaded ring piece 403 clamps the outer circle of the end of the milling cutter body 6. Then, the positioning motor 106 is operated to drive the shaft 102 to rotate, and the two sliders 104 are close to each other until the blade of the milling cutter body 6 is inserted into the positioning tube 2 5 and contacts the arc-shaped rubber pad 501, and the positioning is completed;

[0041] A rotating motor 401 is also fixed to the upper end of the slider 104 where the positioning tube 1 4 is located, and the rotating motor 401 is located at the end of the positioning tube 1 4 away from the positioning tube 2 5, and the output shaft of the rotating motor 401 is fixedly connected to the closed end of the positioning tube 1 4;

[0042] During fine grinding, the rotary motor 401 is used to drive the positioning tube 4 to rotate, and at the same time, the positioning tube 5 is driven to rotate in the bearing seat 105, and further drives the milling cutter body 6 to rotate synchronously, so as to facilitate rapid fine grinding operations.

[0043] The bottoms of the two linear modules 2 are movably connected to a crossbeam 3, and the bottom of the crossbeam 3 is slidably connected to two sliders 305, and a bearing seat 3012 is fixed to the bottom of each slider 305, and a main shaft 302 is rotatably connected in each bearing seat 3012. A cylinder 301 is fixed at the top center of the crossbeam 3, and the piston rod of the telescopic end of the cylinder 301 passes through the crossbeam 3 downward and is fixed with an inverted Y-shaped rod 3011, and the Y-shaped rod 3 The two bottom ends of 011 are both fixed with bearing seats 3051, and the secondary shaft 303 is rotatably connected in the bearing seats 3051, and the outer peripheries of the main shaft 302 and the secondary shaft 303 are fixed with pulleys 306, and the outer sides of all the pulleys 306 are collectively sleeved with a fine grinding belt 304; the bearing seat 3051 is located below the bearing seat 2 3012, the secondary shaft 303 is located below the main shaft 302, and the vertical part of the Y-shaped rod 3011 is located between the two sliders 2 305;

[0044] Before fine grinding, the cylinder 301 works to drive the Y-shaped rod 3011 to descend, so that the bearing seat 3051 and the secondary shaft 303 descend, thereby driving the fine grinding belt 304 to deform until the bottom surface of the fine grinding belt 304 contacts the outer circle area of ​​the milling cutter body 6. At this time, the Y-shaped rod 3011 stops moving. In this process, the two sliders 305 will also approach each other, the distance between the two main shafts 302 will become smaller, and the distance between the main shaft 302 and the secondary shaft 303 will increase. The fine grinding belt 304 is sleeved by four pulleys 306. A corresponding driving member is installed under any slider 305 (not shown in the attached figure for the convenience of display), driving any main shaft 302 to rotate, and the remaining main shafts 302 and secondary shafts 303 cooperate with the fine grinding belt 304 to rotate synchronously, so that the outer circle of the milling cutter body 6 can be finely ground.

[0045] End plates 307 are fixed to both ends of the bottom surface of the crossbeam 3, and connecting plates 3052 are fixed to the ends away from each other on the bottom surfaces of the two sliders 305, and springs 3071 are fixed between each end plate 307 and the connecting plate 3052 adjacent thereto;

[0046] During the movement of the second slider 305 towards each other, the spring 3071 is stretched, which can keep the two main shafts 302 and the second slider 305 always in a tightened state, thereby helping the subsequent rotation and fine grinding operation of the fine grinding belt 304;

[0047] The four corners of the top surface of the workbench 1 are all fixed with pillars 101, and the tops of the two pillars 101 on the same side of the workbench 1 are jointly fixed with a linear module 2;

[0048] Finally, the linear module 2 drives the crossbeam 3 to perform a certain area of ​​reciprocating linear motion, so that the fine grinding belt 304 performs a certain reciprocating linear motion along the outer circle of the milling cutter body 6, thereby fine grinding the outer circle of the milling cutter body 6 better and over a larger area.

[0049] The specific working principle of the utility model is as follows: first, the milling cutter body 6 needs to be positioned, the end portion of the milling cutter body 6 is inserted into the positioning tube 4, and fixed with the magnet 404, then the nut 402 is rotated to the outside of the threaded ring piece 403, until the threaded ring piece 403 clamps the outer circle of the end of the milling cutter body 6, the opening of the positioning tube 4 is locked, the position is limited, and then the positioning motor 106 rotates. Because the shaft rod 102 is provided with threads at opposite ends, the two sliders 104 in the slide groove 103 are close to each other, until the blade of the milling cutter body 6 is inserted into the positioning tube 2 5 and squeezed into the inner cavity formed by the three arc-shaped rubber pads 501, the blade of the milling cutter body 6 contacts the arc-shaped rubber pads 501, and then the rotating motor 401 is operated to drive the positioning tube 4 to rotate in the bearing seat 105, and drive the positioning tube 2 5 to rotate in the bearing seat 105, so that the milling cutter body 6 rotates; then the cylinder 301 is operated to drive the Y-shaped rod 3011 The spring 3071 is stretched to keep the two main shafts 302 and the second slider 305 in a tightened state at all times. A corresponding driving member is installed under any slider 305 (not shown in the attached drawings for the convenience of display). Any main shaft 302 is driven to rotate. The remaining main shafts 302 and the secondary shaft 303 are synchronously rotated with the fine grinding belt 304. The fine grinding belt 304 contacts the outer circle of the milling cutter body 6 and is quickly finely ground with the rotation of the milling cutter body 6 and the rotation of the fine grinding belt 304. The rotation directions of the fine grinding belt 304 and the milling cutter body 6 are opposite. Finally, the linear module 2 drives the crossbeam 3 to perform a reciprocating linear motion in a certain area, so that the fine grinding belt 304 performs a certain reciprocating linear motion along the outer circle of the milling cutter body 6, thereby accelerating the process of the fine grinding operation.

[0050] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the aforementioned embodiments and any equivalent replacement of some of the technical features therein, any modification, equivalent replacement, and improvement made are all within the protection scope of the present invention.

Claims

1. A PCB milling cutter external cylindrical fine grinding processing equipment, comprising a workbench (1), a linear module (2), a crossbeam (3), a first positioning tube (4) and a second positioning tube (5), characterized in that: The workbench (1) is provided with two symmetrically distributed slide grooves (103) through-through, and the two slide grooves (103) are rotatably connected to a shaft rod (102), and each slide groove (103) is also slidably provided with a slider (104), and a bearing seat (105) is fixed to the upper end of the two sliders (104), and a positioning tube (4) is rotatably connected to one bearing seat (105), and a positioning tube (5) is rotatably connected to the other bearing seat (105); A magnet (404) is fixed to the inner end of the first positioning tube (4), and arc-shaped rubber pads (501) distributed in a ring array are fixed to the inner wall of the second positioning tube (5); Support pillars (101) are fixed at the four corners of the top surface of the workbench (1), and a linear module (2) is fixed on the tops of two support pillars (101) on the same side of the workbench (1); The bottoms of the two linear modules (2) are movably connected to a crossbeam (3), and the bottom of the crossbeam (3) is slidably connected to two sliders (305), the bottom of each slider (305) is fixed with a bearing seat (3012), and each bearing seat (3012) is rotatably connected to a main shaft (302), a cylinder (301) is fixed at the top center of the crossbeam (3), and a piston rod at the telescopic end of the cylinder (301) penetrates the crossbeam (3) downward and is fixed with an inverted Y-shaped rod (3011), and the two bottom ends of the Y-shaped rod (3011) are fixed with bearing seats (3051), and a secondary shaft (303) is rotatably connected to the bearing seat (3051), and the outer peripheries of the main shaft (302) and the secondary shaft (303) are fixed with pulleys (306), and all the pulleys (306) are collectively sleeved with a fine grinding belt (304).

2. The PCB milling cutter outer cylindrical fine grinding equipment according to claim 1, characterized in that: A positioning motor (106) is fixed to the end of the workbench (1), and the output shaft of the positioning motor (106) is fixedly connected to the end of the shaft rod (102); the outer circumference of the shaft rod (102) in the two slide grooves (103) is provided with threads, and the two sections of the threads are in opposite directions, and the slider (104) in each slide groove (103) is threadedly connected to the outside of the shaft rod (102) in the slide groove (103).

3. The PCB milling cutter outer cylindrical fine grinding equipment according to claim 1, characterized in that: A rotating motor (401) is also fixed to the upper end of the slider one (104) where the positioning tube one (4) is located, and the rotating motor (401) is located at an end of the positioning tube one (4) away from the positioning tube two (5), and the output shaft of the rotating motor (401) is fixedly connected to the closed end of the positioning tube one (4).

4. The PCB milling cutter outer cylindrical fine grinding equipment according to claim 1, characterized in that: The end of the positioning tube 1 (4) close to the positioning tube 2 (5) is an open end, and the open end of the positioning tube 1 (4) is provided with threaded ring pieces (403) distributed in a ring array, and the threaded ring pieces (403) are externally threadedly connected to nuts (402).

5. The PCB milling cutter outer cylindrical fine grinding equipment according to claim 4, characterized in that: A milling cutter body (6) is inserted between the positioning tube one (4) and the positioning tube two (5), and the end portion of the milling cutter body (6) extends into the inner cavity of the positioning tube one (4) and is magnetically fixed to the magnet (404), and the blade of the milling cutter body (6) extends into the positioning tube two (5) and contacts the inner wall of the arc-shaped rubber pad (501).

6. The PCB milling cutter outer cylindrical fine grinding equipment according to claim 1, characterized in that: The bearing seat three (3051) is located below the bearing seat two (3012), the secondary shaft (303) is located below the main shaft (302), and the vertical portion of the Y-shaped rod (3011) is located between the two sliders two (305).

7. The PCB milling cutter outer cylindrical fine grinding equipment according to claim 1, characterized in that: End plates (307) are fixed to both ends of the bottom surface of the crossbeam (3), and connecting plates (3052) are also fixed to the ends of the bottom surfaces of the two sliders (305) that are away from each other. A spring (3071) is fixed between each end plate (307) and the connecting plate (3052) adjacent thereto.

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