Pressure foot, pressure foot cup and drilling machine

Abstract

The utility model relates to the technical field of circuit board drilling processing, in particular to a pressure foot, a pressure foot cup and a drilling machine. The presser foot comprises a main body, the main body is provided with a mounting hole penetrating through the main body in the axial direction, the main body is provided with a first end and a second end which are opposite in the axial direction, the first end of the main body is used for being mounted on the pressure foot cup, the second end of the main body is used for abutting against a workpiece to be machined, and the second end of the main body is provided with a plurality of vent grooves; the main body is provided with an outer wall opposite to the inner wall of the mounting hole, one end of the vent groove is communicated with the mounting hole, and the other end forms a diversion port; and the sectional area of the side wall of the flow guide opening is gradually reduced in the direction from the mounting hole to the outer wall of the main body. According to the utility model, gas can enter the vent groove more easily, and the cooling effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit board drilling processing, in particular to a presser foot, a pressure foot cup and a drilling machine. Background Art

[0002] The presser foot is often used in the process of drilling holes in circuit boards. The staff can use the presser foot to apply pressure to the circuit board to be drilled, so that the surface of the circuit board to be drilled remains flat within a small range. At the same time, there will be ventilation grooves and knife holes for the drill to pass through on the presser foot. After the presser foot presses the circuit board tightly, the drill drills the circuit board through the knife hole, and the ventilation groove is used to cool the drill and circuit board.

[0003] In the prior art, it is not easy for gas to flow into the ventilation groove, which affects the cooling of the drill bit and the circuit board. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in view of the problem that in the prior art, gas is not easy to flow into the ventilation groove, which affects the cooling of the drill bit and the circuit board, a pressure foot, a pressure foot cup and a drilling machine are provided.

[0005] In order to solve the above technical problems, on the one hand, the embodiment of the utility model provides a presser foot, comprising a main body, the main body is provided with a mounting hole penetrating the main body along its axial direction, the main body has a first end and a second end opposite to each other along its axial direction, the first end of the main body is used to be mounted on a pressure foot cup, the second end of the main body is used to abut against a workpiece to be processed, and the second end of the main body is provided with a plurality of ventilation grooves;

[0006] The main body has an outer wall opposite to the inner wall of the mounting hole, one end of the vent groove is connected to the mounting hole, and the other end forms a guide port;

[0007] Along the direction away from the mounting hole, the cross-sectional area of ​​the side wall of the guide port gradually decreases.

[0008] Optionally, the mounting hole is located at the center of the main body.

[0009] Optionally, the mounting hole includes a first through hole and a second through hole, and along the direction from the second end to the first end of the main body, the second through hole and the first through hole are arranged in sequence and communicated with each other;

[0010] The cross sections of the second through hole and the first through hole in the horizontal direction are both circular, and the aperture of the first through hole is larger than the aperture of the second through hole.

[0011] Optionally, the diameter of the second through hole ranges from 2 mm to 5 mm.

[0012] Optionally, a transition hole is provided at one end of the first through hole close to the second through hole, and the transition hole is connected between the first through hole and the second through hole; the cross-section of the transition hole in the horizontal direction is circular, and the cross-sectional area of ​​the transition hole gradually decreases along the direction close to the second through hole.

[0013] Optionally, a plurality of ventilation grooves are provided, and the plurality of ventilation grooves are spaced apart from each other and are not parallel to each other.

[0014] Optionally, a mounting portion is provided at the first end of the main body, a clamping portion connected to the mounting portion is provided at the second end of the main body, the mounting hole passes through the mounting portion and the clamping portion, the mounting portion is used to be installed on the pressure foot cup, the clamping portion is used to abut the workpiece to be processed, and the ventilation groove is provided at one end of the clamping portion away from the mounting portion.

[0015] Optionally, a truncated cone structure is provided at one end of the clamping portion away from the mounting portion, and the cross-sectional area of ​​the truncated cone structure in the horizontal direction gradually decreases in the direction away from the mounting portion; the ventilation groove is provided at one end of the truncated cone structure away from the mounting portion and passes through the outer circumferential surface of the truncated cone structure.

[0016] Optionally, the mounting portion is provided with a clamping ring for clamping the presser foot onto the pressure foot cup.

[0017] Optionally, the pressing portion is provided with a disassembly groove for facilitating the detachment of the presser foot from the pressure foot cup.

[0018] According to the presser foot of this embodiment, when drilling a workpiece, the first end of the presser foot is mounted on the pressure foot cup, the second end of the presser foot abuts against the workpiece, and the drill passes through the mounting hole to drill the workpiece. When drilling, the external gas enters the ventilation groove and enters the through hole from the ventilation groove, thereby cooling the workpiece and the drill in the mounting hole. At the same time, the guide port of this embodiment passes through the inner wall of the mounting hole and the outer wall of the main body, and the cross-sectional area of ​​the side wall of the guide port gradually decreases from the inner wall to the outer wall, so that the gas outside the presser foot can enter the ventilation groove more easily, thereby improving the cooling effect.

[0019] On the other hand, the embodiment of the utility model provides a pressure foot cup, including a cup body,

[0020] The cup body is provided with an assembly hole along its axial direction for assembling any one of the presser feet described above;

[0021] The cup body is provided with a dust suction port and a guide hole, the dust suction port is communicated with the assembly hole, and the guide hole is used to adapt to the guide shaft of the drilling machine;

[0022] One end of the cup body is used to be mounted on the main shaft of the drilling machine, and the center of the other end protrudes around the assembly hole to form a boss, and the presser foot is mounted on the boss.

[0023] On the other hand, an embodiment of the utility model provides a drilling machine, including a drilling machine body and the above-mentioned pressure foot cup. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a presser foot provided by an embodiment of the utility model from a first viewing angle;

[0025] Figure 2 It is a structural schematic diagram of a presser foot provided by an embodiment of the utility model from a second viewing angle;

[0026] Figure 3 It is a structural schematic diagram of a presser foot provided by an embodiment of the utility model from a third viewing angle;

[0027] Figure 4 It is a structural schematic diagram of a pressure foot cup provided by an embodiment of the utility model;

[0028] Figure 5 It is a schematic diagram of the connection relationship between the presser foot and the pressure foot cup provided by an embodiment of the utility model from a first viewing angle;

[0029] Figure 6 It is a schematic diagram of the connection relationship between the presser foot and the pressure foot cup provided by an embodiment of the utility model from a second viewing angle.

[0030] The reference numerals in the specification are as follows:

[0031] 1. Main body; 2. Mounting hole; 3. Ventilation groove; 4. Diversion port; 5. Cup body; 6. Assembly hole; 7. Dust suction port; 8. Guide hole; 9. Boss; 11. Mounting part; 12. Pressing part; 13. Cone structure; 14. Snap ring; 15. Disassembly groove; 21. First through hole; 22. Second through hole; 23. Transition hole; 100. Presser foot; 200. Pressure foot cup. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0033] like Figures 1 to 6As shown, an embodiment of the utility model provides a presser foot 100, comprising a main body 1, the main body 1 is provided with a mounting hole 2 penetrating the main body 1 along its axial direction, the main body 1 has a first end and a second end opposite to each other along its axial direction, the first end of the main body 1 is used to be mounted on a pressure foot cup 200, the second end of the main body 1 is used to abut on a workpiece to be processed, and the second end of the main body 1 used to abut on the workpiece to be processed is provided with a plurality of ventilation grooves 3;

[0034] The main body 1 has an outer wall opposite to the inner wall of the mounting hole 2. One end of the vent groove 3 is connected to the mounting hole 2. A guide port 4 is formed at the other end of the outer wall. The opening direction of the guide port 4 faces the outer wall.

[0035] Along the direction from the mounting hole 2 to the outer wall of the main body 1, the cross-sectional area of ​​the side wall of the guide port 4 gradually decreases. In the present embodiment, the workpiece to be processed may be a PCB board or other plate materials. In the present embodiment, the bottom surface of the guide port 4 is coplanar with the bottom surface of the vent groove 3, the mounting hole 2 is preferably a circular hole, and the preferred range of the aperture of the mounting hole 2 is 2mm to 5mm, which reduces the clamping area when drilling the workpiece to be processed and reduces the influence of the deflection of the drill during drilling. Of course, mounting holes 2 of other aperture sizes are also within the protection scope of this implementation.

[0036] In one embodiment, the mounting hole 2 is located at the center of the main body 1 .

[0037] In one embodiment, the mounting hole 2 includes a first through hole 21 and a second through hole 22. The second through hole 22 and the first through hole 21 are arranged in sequence and communicate with each other along the direction from the second end to the first end of the main body 1. The cross-sections of the second through hole 22 and the first through hole 21 in the horizontal direction are both circular, and the aperture of the first through hole 21 is larger than the aperture of the second through hole 22. In this embodiment, the provision of the first through hole 21 can prevent the interference of the chuck of the main shaft of the drilling machine, so that the drilling work can be performed stably.

[0038] In one embodiment, the aperture of the second through hole 22 ranges from 2 mm to 5 mm. In this embodiment, the aperture of the second through hole can be 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, and 5 mm. It can also be an aperture of other sizes, such as 3.1 mm, 3.2 mm, 4.1 mm, 4.2 mm, etc., to meet the needs of drills with different diameters. Among them, the aperture of the second through hole 22 is preferably 4 mm. At the same time, the diameter of the drill adapted to the second through hole 22 is 0.2 mm-1 mm smaller than the aperture of the second through hole 22. For example, when the aperture of the second through hole 22 is 4 mm, the diameter of the drill is 3 mm-3.8 mm. When the aperture of the second through hole 22 is 4.5 mm, the diameter of the drill is 3.5 mm-4.3 mm. That is, the drill in this embodiment is clearance-matched with the second through hole 22, and the influence of the presser foot 100 on the drill can be avoided during drilling. In this embodiment, the drill cutter is preferably a collarless cutter.

[0039] In one embodiment, the end of the first through hole 21 close to the second through hole 22 has a transition hole 23, and the transition hole 23 is connected between the first through hole 21 and the second through hole 22; the cross-section of the transition hole 23 in the horizontal direction is circular, and the cross-sectional area of ​​the transition hole in the direction close to the second through hole gradually decreases. In this embodiment, the end of the first through hole 21 close to the second through hole 22 is chamfered to form the transition hole 23. Correspondingly, the outer wall of the main body 1 also has a chamfered structure, and the guide port 4 is located on the chamfered structure, so that the height of the guide port 4 gradually changes and the height of the groove wall of the ventilation groove 3 is greater than the height of the channel side wall of the guide port 4, so that the ventilation groove 3 of this embodiment improves the air intake effect; and improves the wind erosion resistance life of the ventilation groove 3. In addition, the setting of the guide port 4 in this embodiment shortens the length of the ventilation groove 3 accordingly, which can improve the air intake efficiency. Preferably, the chamfer of the outer wall of the main body 1 of this embodiment is preferably 30°, and of course chamfers at other angles are also within the protection scope of this embodiment.

[0040] In one embodiment, a plurality of ventilation grooves 3 are provided, and the plurality of ventilation grooves 3 are spaced apart from each other and are not parallel to each other. In this embodiment, the number of ventilation grooves 3 is preferably five, and the five ventilation grooves 3 are spirally distributed on the main body 1. Preferably, the range value of the groove width of the ventilation groove 3 is preferably 1.0mm to 1.5mm; the range value of the groove depth of the ventilation groove 3 is 0.8mm to 1.2mm. Of course, groove widths or groove depths of other size ranges are also within the protection scope of this embodiment. In other embodiments, the number of ventilation grooves 3 is other values. For example, the plurality of ventilation grooves 3 can be distributed in a cross, a M-shaped or other shape.

[0041] In one embodiment, the first end of the main body 1 is provided with a mounting portion 11, the second end of the main body 1 is provided with a pressing portion 12 connected to the mounting portion 11, the mounting hole 2 passes through the mounting portion 11 and the pressing portion 12, the mounting portion 11 is used to be mounted on the pressure foot cup 200, the pressing portion 12 is used to abut against the workpiece to be processed, and the venting groove 3 is provided at one end of the pressing portion 12 away from the mounting portion 11. In this embodiment, the mounting portion 11 and the pressing portion 12 are integrally formed, and the mounting portion 11 is mounted in the assembly hole 6 on the pressure foot cup 200, and a sealing effect is achieved at the same time. At the same time, the thickness of the pressing portion 12 is preferably 4.3 mm, so that the pin portion on the workpiece to be processed can be avoided during drilling.

[0042] In one embodiment, a truncated cone structure 13 is provided at one end of the clamping portion 12 away from the mounting portion 11, and the cross-sectional area of ​​the truncated cone structure 13 gradually decreases in the direction away from the mounting portion 11; the ventilation groove 3 is provided at one end of the truncated cone structure 13 away from the mounting portion 11 and passes through the outer peripheral surface of the truncated cone structure 13. In this embodiment, the truncated cone structure 13 corresponds to the structure of the transition hole 23 and is a chamfered structure. In this embodiment, the ventilation groove 3 passes through the side surface of the truncated cone structure 13, so that the ventilation groove 3 also has a chamfered structure, and the chamfered structure is the guide port 4 in the above embodiment. Preferably, the chamfer size of the chamfered structure of the ventilation groove 3 is 30°, which can shorten the length of the ventilation groove 3 and improve the air intake effect.

[0043] In one embodiment, the mounting portion 11 is provided with a clamping ring 14 for clamping the presser foot 100 on the pressure foot cup 200. In this embodiment, the pressure foot cup 200 is provided with a clamping groove adapted to the clamping ring 14, and the clamping ring 14 is clamped in the clamping groove to achieve the connection between the presser foot 100 and the pressure foot cup 200.

[0044] In one embodiment, the clamping portion 12 is provided with a disassembly groove 15 for detaching the presser foot 100 from the pressure foot cup 200. In this embodiment, the presser foot 100 is in a tightly fitted state after being assembled on the pressure foot cup 200. By providing the disassembly groove 15, it is convenient to disassemble the presser foot 100 from the pressure foot cup 200. In this embodiment, the number of the disassembly grooves 15 is multiple, and the multiple disassembly grooves 15 are spaced apart from each other and surround the clamping portion 12. Preferably, the number of the disassembly grooves 15 is four. At the same time, when the mounting portion 11 is installed in the assembly hole 6 of the pressure foot cup 200, the disassembly groove 15 is located outside the assembly hole 6, which can facilitate the disassembly of the presser foot 100.

[0045] According to the presser foot 100 of the present embodiment, when drilling a workpiece, the first end of the presser foot 100 is mounted on the pressure foot cup 200, the second end of the presser foot 100 abuts against the workpiece, and the drill passes through the mounting hole 2 to drill the workpiece. When drilling, the external gas enters the ventilation groove 3, and enters the second through hole 22 from the ventilation groove 3, so that the workpiece and the drill in the mounting hole 2 can be cooled. At the same time, the ventilation groove 3 of the present embodiment passes through the inner wall of the mounting hole 2 and the outer wall of the main body 1, and a guide port 4 is formed at the outer wall, and the side wall height of the guide port 4 is gradually reduced, so that the gas outside the presser foot 100 can more easily enter the ventilation groove 3, thereby improving the cooling effect.

[0046] In addition, an embodiment of the present invention provides a pressure foot cup 200, including a cup body 5, wherein the cup body 5 is provided with an assembly hole 6 along its axial direction for assembling the pressure foot 100 of the above embodiment.

[0047] In one embodiment, the cup body 5 is provided with a suction port 7 for dust to pass through, and the suction port 7 is connected to the assembly hole 6. In this embodiment, the suction port 7 is suitable for assembling a dust suction component, and when drilling, the dust suction device sucks out the dust generated during processing through the suction port 7.

[0048] In one embodiment, a guide hole 8 for adapting to the guide shaft of a drilling machine is provided on the cup body 5. This can guide the main shaft of the drilling machine, making it easier for the drilling machine to drill holes on the workpiece to be processed.

[0049] In one embodiment, one end of the pressure foot cup 200 is used to be mounted on the main shaft of the drilling machine, and the center of the other end protrudes around the assembly hole 6 to form a boss 9, and the pressure foot 100 is mounted on the boss 9. In this embodiment, the assembly hole 6 is insulated. At the same time, the height of the boss 9 is preferably 1.5 mm. When the pressure foot 100 is worn, the pins on the workpiece to be processed will not hit the pressure foot cup 200, which reduces the failure rate and improves the safety performance.

[0050] According to the pressure foot cup 200 of this embodiment, when drilling the workpiece, the presser foot 100 is installed in the assembly hole 6 of the cup body 5, and the end of the cup body 5 away from the presser foot 100 is installed on the drilling machine, and the drill of the drilling machine passes through the mounting hole 2 of the presser foot 100 in the assembly hole 6 to process the workpiece. The diameter of the tool used for drilling holes in circuit boards nowadays basically tends to be a tool below 4mm, and the frequency of use of the presser foot 100 for large holes is getting less and less. In this embodiment, the presser foot 100 is only provided with a mounting hole 2 of one specification. Compared with the presser foot 100 with both large diameter holes and small diameter holes, the pressure foot cup 200 of this embodiment does not need to be provided with a switching device for switching the corresponding large holes and small holes, so as to prevent the failure of the switching device from causing downtime maintenance, reduce the tool change time and steps, and thus avoid the jamming or jamming caused by switching, improve the utilization rate of the equipment, improve the drilling efficiency, and significantly improve the drilling accuracy of the drilling machine.

[0051] In addition, an embodiment of the present invention provides a drilling machine, including a drilling machine body and the pressure foot cup 200 of the above embodiment.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A presser foot, characterized in that: The main body comprises a mounting hole which penetrates the main body along its axial direction, the main body comprises a first end and a second end which are opposite to each other along its axial direction, the first end of the main body is used to be mounted on the pressure foot cup, the second end of the main body is used to abut against the workpiece to be processed, and the second end of the main body is provided with a plurality of ventilation grooves; The main body has an outer wall opposite to the inner wall of the mounting hole, one end of the vent groove is connected to the mounting hole, and the other end forms a guide port; Along the direction away from the mounting hole, the cross-sectional area of ​​the side wall of the guide port gradually decreases.

2. The presser foot according to claim 1, characterized in that: The mounting hole is located at the center of the main body.

3. The presser foot according to claim 1, characterized in that: The mounting hole comprises a first through hole and a second through hole, and along the direction from the second end to the first end of the main body, the second through hole and the first through hole are arranged in sequence and communicate with each other; The cross sections of the second through hole and the first through hole in the horizontal direction are both circular, and the aperture of the first through hole is larger than the aperture of the second through hole.

4. The presser foot according to claim 3, characterized in that: The diameter of the second through hole ranges from 2 mm to 5 mm.

5. The presser foot according to claim 3, characterized in that: One end of the first through hole close to the second through hole has a transition hole, and the transition hole is connected between the first through hole and the second through hole; The cross-section of the transition hole in the horizontal direction is circular, and the cross-sectional area of ​​the transition hole gradually decreases along the direction approaching the second through hole.

6. The presser foot according to claim 1, characterized in that: A plurality of ventilation grooves are provided, and the plurality of ventilation grooves are spaced apart from each other and are not parallel to each other.

7. The presser foot according to claim 1, characterized in that: A mounting portion is disposed at the first end of the main body, a clamping portion connected to the mounting portion is disposed at the second end of the main body, the mounting hole passes through the mounting portion and the clamping portion, the mounting portion is used to be mounted on the pressure foot cup, the clamping portion is used to abut against the workpiece to be processed, and the ventilation groove is disposed at one end of the clamping portion away from the mounting portion.

8. The presser foot according to claim 7, characterized in that: A truncated cone structure is provided at one end of the pressing portion away from the mounting portion, and the cross-sectional area of ​​the truncated cone structure in the horizontal direction gradually decreases in the direction away from the mounting portion; The ventilation groove is arranged at one end of the truncated cone structure away from the mounting portion and passes through the outer peripheral surface of the truncated cone structure.

9. The presser foot according to claim 7, characterized in that: The mounting portion is provided with a clamping ring for clamping the presser foot onto the pressure foot cup.

10. The presser foot according to claim 7, characterized in that: The pressing part is provided with a disassembly groove for detaching the presser foot from the pressure foot cup.

11. A pressure foot cup, characterized in that: It comprises a cup body, wherein the cup body is provided with an assembly hole for assembling the presser foot according to any one of claims 1 to 10 along its axial direction; The cup body is provided with a dust suction port and a guide hole, the dust suction port is communicated with the assembly hole, and the guide hole is used to adapt to the guide shaft of the drilling machine; One end of the cup body is used to be mounted on the main shaft of the drilling machine, and the center of the other end protrudes around the assembly hole to form a boss, and the presser foot is mounted on the boss.

12. A drilling machine, characterized in that: It comprises a drilling machine body and the pressure foot cup as claimed in claim 11.

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