PCB (printed circuit board) drill point convenient for chip removal

Abstract

The utility model discloses a pcb drill point convenient for chip removal, and relates to the technical field of pcb drill points, the pcb drill point convenient for chip removal comprises a drillstock, a drill bit and a lubricating assembly, the drill bit is arranged on the drillstock, the drill bit comprises a plurality of blades for cutting holes, chip removal grooves for discharging chips are arranged among the blades, and the chip removal grooves are communicated with the drillstock. The lubricating assembly is arranged on the groove wall of the chip groove and comprises a reinforcing layer, a protective layer and a lubricating layer, the reinforcing layer is used for enhancing the hardness of the groove wall of the chip groove, the protective layer is used for enhancing the corrosion resistance of the chip groove, and the lubricating layer is used for assisting the chip groove in smoothly discharging chips. The reinforcing layer, the protective layer and the lubricating layer are sequentially arranged in a stacked mode. By means of the lubricating assembly, the abrasion resistance of the wall of the chip groove is enhanced while the smoothness of the wall of the chip groove in the drill bit is improved, and the drill bit can discharge chips permanently and smoothly through the chip groove.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB drill bits for convenient chip removal, in particular to a PCB drill bit for convenient chip removal. Background Art

[0002] PCB drill bit is mainly used in PCB manufacturing, that is, it is used to drill holes on printed circuit boards. The iron chips generated by the PCB drill bit when drilling holes will enter the spiral groove on the PCB drill bit and gradually be discharged from the hole along the thread groove. After being discharged from the hole, it will break away from the thread groove and fall to the outside, thus completing the chip removal work.

[0003] When a PCB drill bit opens a hole, it will remove chips through the chip groove on the blade. The smoothness of chip removal is affected by the smoothness of the chip groove wall. The PCB drill bit needs to rotate at high speed during use. When the chip groove wall is not smooth enough, it is difficult for iron chips to enter the chip groove during the high-speed rotation of the drill bit and be discharged through the chip groove. Utility Model Content

[0004] The main purpose of the utility model is to provide a PCB drill needle which is convenient for chip removal, and the utility model aims to increase the lubricity of the inner groove wall of the chip removal groove on the PCB drill needle so as to enable the waste chips to be discharged smoothly.

[0005] To achieve the above-mentioned purpose, the utility model provides a PCB drill needle that facilitates chip removal, comprising:

[0006] Drill shank;

[0007] a drill bit, disposed on the drill shank, the drill bit comprising a plurality of blades for cutting holes, wherein chip grooves for discharging chips are provided between the plurality of blades; and

[0008] A lubrication component is arranged on the groove wall of the chip groove, and the lubrication component includes a reinforcement layer, a protective layer and a lubrication layer. The reinforcement layer is used to enhance the hardness of the groove wall of the chip groove, the protective layer is used to enhance the corrosion resistance of the chip groove, and the lubrication layer is used to assist the chip groove in smoothly discharging debris. The reinforcement layer, the protective layer and the lubrication layer are stacked in sequence to enable the chip groove to smoothly discharge debris.

[0009] Preferably, the material of the reinforcement layer is tungsten disulfide, and the reinforcement layer is used to reduce the loss of the chip groove during chip removal. The material of the protective layer is perfluoropolyether, and the protective layer is used to prevent the chip groove from being corroded. The material of the lubricating layer is molybdenum disulfide, and the lubricating layer is used to enable the chip groove to smoothly discharge chips.

[0010] Preferably, the thickness of the lubricating component is greater than one micron and less than ten microns.

[0011] Preferably, the thickness of the reinforcement layer is greater than 0.5 micrometers and less than 2 micrometers.

[0012] Preferably, the thickness of the protective layer is greater than 0.5 micrometers and less than 5 micrometers.

[0013] Preferably, the thickness of the lubricating layer is greater than 0.5 micrometers and less than 1 micrometer.

[0014] Preferably, the plurality of chip removal grooves are centrally symmetrical with respect to the axis of the drill bit.

[0015] Preferably, the helix angle of the chip flute is twenty degrees to forty-five degrees.

[0016] Preferably, an auxiliary component is provided on the lubricating component, and the auxiliary component includes an auxiliary layer, a strengthening layer and a lifting layer.

[0017] Preferably, the auxiliary layer is a phosphor bronze layer, the strengthening layer is a polytetrafluoroethylene layer, and the lifting layer is a polyetheretherketone layer.

[0018] In the technical solution provided by the present invention, the lubrication component is arranged on the groove wall of the chip groove, and the lubrication component includes a reinforcement layer, a protective layer and a lubrication layer. The reinforcement layer is used to enhance the hardness of the groove wall of the chip groove, the protective layer is used to enhance the corrosion resistance of the chip groove, and the lubrication layer is used to assist the chip groove to discharge debris smoothly, and the reinforcement layer, the protective layer and the lubrication layer are stacked in sequence. The reinforcement layer, the protective layer and the lubrication layer improve the smoothness of the groove wall of the chip groove on the drill bit and enhance the wear resistance of the groove wall of the chip groove, so that the drill bit can discharge chips through the chip groove for a long time and smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0020] Figure 1 A three-dimensional schematic diagram of an embodiment of a PCB drill needle for convenient chip removal provided by the present invention;

[0021] Figure 2 for Figure 1 Schematic diagram of the structure of the lubrication component;

[0022] Figure 3 for Figure 1 Schematic diagram of the structure of auxiliary components.

[0023] Description of Figure Numbers:

[0024] 1. Drill shank; 2. Drill bit; 3. Chip groove; 4. Lubrication component; 41. Reinforcement layer; 42. Protective layer; 43. Lubrication layer; 5. Auxiliary component; 52. Auxiliary layer; 52. Strengthening layer; 53. Lifting layer.

[0025] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] The utility model provides a PCB drill needle which is convenient for chip removal. Figures 1 to 3 The utility model provides an embodiment of a PCB drill needle for convenient chip removal.

[0030] Please also refer to Figures 1 to 2The PCB drill needle for convenient chip removal includes a drill shank 1, a drill bit 2 and a lubrication component 4. The drill bit 2 is arranged on the drill shank 1, and the drill bit 2 includes a plurality of blades for cutting holes. A chip groove 3 for discharging debris is provided between the plurality of blades. The lubrication component 4 is arranged on the groove wall of the chip groove 3. The lubrication component 4 includes a reinforcement layer 41, a protective layer 42 and a lubrication layer 43. The reinforcement layer 41 is used to enhance the hardness of the groove wall of the chip groove 3, the protective layer 42 is used to enhance the corrosion resistance of the chip groove 3, and the lubrication layer 43 is used to assist the chip groove 3 in smoothly discharging debris, and the reinforcement layer 41, the protective layer 42 and the lubrication layer 43 are stacked in sequence to enable the chip groove 3 to smoothly discharge debris.

[0031] After the drill bit 2 is processed and formed, three layers of different materials, namely a reinforcement layer 41, a protective layer 42 and a lubricating layer 43, need to be added to the chip groove 3 of the drill bit 2, so that the chip groove 3 can not only smoothly discharge chips but also be used for a long time. First, the strength of the chip groove 3 is enhanced by the reinforcement layer 41, so that the wear and loss of the chip groove 3 during long-term use is reduced, thereby extending the service life. A protective layer 42 is set on the reinforcement layer 41 to enhance the corrosion resistance of the chip groove 3 to prevent the drill bit 2 from being corroded by the cutting fluid during the process of opening the hole, resulting in damage to the chip groove 3 and inability to smoothly discharge chips. Finally, a lubricating layer 43 is set on the protective layer 42 to improve the smoothness of the chip groove 3 wall, so that the chips can slide more smoothly in the chip groove 3, thereby being discharged out of the hole opened by the drill bit 2.

[0032] The reinforcement layer 41, the protective layer 42 and the lubricating layer 43 are processed in different ways according to the materials used and the material of the drill bit 2 itself, such as chemical plating, which deposits one or more layers of metal or alloy on the surface of the drill bit 2 through chemical reaction; physical vapor deposition, which deposits the coating material on the surface of the drill bit 2 by physical methods under vacuum conditions; thermal spraying, which heats the coating material to a molten state, sprays it onto the surface of the drill bit 2, and quickly cools it to form a coating. This method can form coatings of various materials. There are also other processing methods that can set the corresponding coating material on the chip groove 3 of the drill bit 2 at one time, so that the chip groove 3 can perform chip removal work for a long time.

[0033] Therefore, in the technical solution provided by the present invention, the lubrication component 4 is arranged on the groove wall of the chip groove 3, and the lubrication component 4 includes a reinforcement layer 41, a protective layer 42 and a lubrication layer 43. The reinforcement layer 41 is used to enhance the hardness of the groove wall of the chip groove 3, the protective layer 42 is used to enhance the corrosion resistance of the chip groove 3, and the lubrication layer 43 is used to assist the chip groove 3 to discharge debris smoothly, and the reinforcement layer 41, the protective layer 42 and the lubrication layer 43 are stacked in sequence. The smoothness of the groove wall of the chip groove 3 on the drill bit 2 is improved by the reinforcement layer 41, the protective layer 42 and the lubrication layer 43, while enhancing the wear resistance of the groove wall of the chip groove 3, so that the drill bit 2 can discharge chips through the chip groove 3 for a long time and smoothly.

[0034] Different materials can enhance different performances of the drill bit 2. The reinforcement layer 41, the protective layer 42 and the lubricating layer 43 are mainly used to improve the chip removal ability of the chip groove 3 while increasing the service life of the chip groove 3. Specifically, in an embodiment of the present invention, the reinforcement layer 41 is made of tungsten disulfide, and the reinforcement layer 41 is used to reduce the loss of the chip groove 3 during chip removal. The protective layer 42 is made of perfluoropolyether, and the protective layer 42 is used to prevent the chip groove 3 from being corroded. The lubricating layer 43 is made of molybdenum disulfide, and the lubricating layer 43 is used to enable the chip groove 3 to smoothly discharge chips.

[0035] Tungsten disulfide has high wear resistance and can effectively reduce the wear of the drill bit 2 caused by friction during high-speed cutting. At the same time, it can also reduce the adhesion between the material and the drill bit 2, reduce the adhesion of the material to the drill bit 2 during the cutting process, and can also improve the resistance of the drill bit 2 to impact loads, making it more durable during the drilling process. Therefore, tungsten disulfide is set as the reinforcement layer 41 to increase the hardness of the chip groove 3 of the drill bit 2, thereby increasing the wear resistance of the chip groove 3. At the same time, by enhancing the resistance of the drill bit 2 to impact loads, the possibility of the drill bit 2 breaking during high-speed rotation and drilling is reduced, thereby increasing the service life of the drill bit 2.

[0036] Perfluoropolyether is chemically stable and can withstand the effects of a variety of chemical substances, including corrosive components in cutting fluid, thereby improving the corrosion resistance of the chip groove 3 on the drill bit 2. It also has good high-temperature resistance and can withstand high temperatures during high-speed drilling, protecting the chip groove 3 on the drill bit 2 from damage by high temperatures. Therefore, perfluoropolyether is provided as a protective layer 42 to protect the chip groove 3 from being corroded by the cutting fluid during the rotation of the drill bit 2, while ensuring that the chip groove 3 is not affected by the high temperature generated during the high-speed rotation of the drill bit 2, thereby ensuring the long-term use of the chip groove 3.

[0037] Molybdenum disulfide has a layered structure with weak bonding between layers, which enables it to provide good lubrication during sliding, so that the chips can slide smoothly in the chip groove 3 after entering the chip groove 3, and slide along the extension direction of the chip groove 3 to the outside of the hole opened by the drill bit 2. It also has wear resistance, which can reduce the wear of the drill bit 2 during high-speed cutting, and molybdenum disulfide can still maintain its performance at high temperatures, which helps the chip groove 3 to maintain wear resistance and efficiency in a high-temperature environment during high-speed drilling. Therefore, molybdenum disulfide is set as a lubricating layer 43, which improves the smoothness of the chip groove 3 while enhancing the wear resistance of the lubricating layer 43, preventing the lubricating layer 43 from being quickly consumed during high-speed drilling, and enhancing its high-temperature resistance, so that the lubricating layer 43 can still discharge chips smoothly in a high-temperature environment.

[0038] The diameter of the hole that can be opened by the drill bit 2 after it is formed has a fixed standard. Adding a reinforcement layer 41, a protective layer 42 and a lubricating layer 43 to the drill bit 2 will cause the diameter of the hole that can be opened by the drill bit 2 to be larger than the preset hole diameter. In order to avoid affecting the preset hole diameter opened by the drill bit 2, it is necessary to limit the thickness of the reinforcement layer 41, the protective layer 42 and the lubricating layer 43 to ensure that while adding the reinforcement layer 41, the protective layer 42 and the lubricating layer 43 can improve the corresponding performance of the drill bit 2, it will not affect the standard of the hole diameter required to be opened by the drill bit 2.

[0039] Specifically, in the technical solution of the present invention, the thickness of the reinforcement layer 41 is greater than 0.5 microns and less than two microns, the thickness of the protective layer 42 is greater than 0.5 microns and less than five microns, and the thickness of the lubricating layer 43 is greater than 0.5 microns and less than one micron.

[0040] Furthermore, the plurality of chip removal grooves 3 all extend spirally along the axial direction of the drill bit 2 .

[0041] The spiral design allows the chips to be discharged smoothly along the groove, avoiding chip blockage during the drilling process, affecting the drilling accuracy and the life of the drill bit 2. At the same time, this design helps the coolant reach the cutting area, reducing the temperature of the drill bit 2 and the workpiece, reducing thermal deformation, and improving the drilling quality. The spiral chip groove 3 also helps to improve the rigidity of the drill bit 2, reduce bending and vibration during the drilling process, further improve the accuracy and surface quality of the hole, and the spiral discharge groove helps to improve the roughness of the hole wall, making the hole wall smoother.

[0042] Furthermore, the plurality of chip removal grooves 3 are centrally symmetrical with respect to the axis of the drill bit 2 .

[0043] The centrally symmetrical chip groove 3 design helps to discharge chips smoothly during the rotation of the drill bit 2, reduces the accumulation of chips between the drill bit 2 and the hole wall, and prevents the chips from generating additional resistance and heat during the drilling process, thereby improving the drilling accuracy and the service life of the drill bit 2. It can also help disperse the stress generated by the drill bit 2 during the cutting process, maintain the dynamic balance of the drill bit 2, reduce the vibration and wear of the drill bit 2 caused by imbalance, and further improve the drilling accuracy and durability of the drill bit 2. Through this design, the PCB drill bit 2 can improve the processing quality of the hole and the service life of the drill bit 2 while ensuring processing efficiency.

[0044] Furthermore, the helix angle of the chip flute 3 is in a range from twenty degrees to forty-five degrees.

[0045] The helix angle of the chip groove 3 is designed to be twenty to forty-five degrees in order to optimize the discharge of chips, improve processing efficiency and tool life, provide good chip removal performance, effectively discharge chips from the processing area, reduce heat generation and tool wear during the cutting process, and by optimizing the discharge of chips, it can reduce damage to the tool caused by chip blockage, thereby extending the service life of the tool, and good chip removal performance helps to improve processing efficiency, because the rapid discharge of chips can reduce downtime during processing and improve the continuous working capacity of the production line.

[0046] See also Figure 3An auxiliary component 5 is provided on the lubrication component 4, and the auxiliary component 5 includes an auxiliary layer 51, a strengthening layer 52 and a lifting layer 53. Among them, the auxiliary layer 51 is a phosphor bronze layer. Phosphor bronze is a copper-based alloy containing phosphorus, and usually also contains a small amount of tin, lead and other elements such as nickel, zinc or aluminum to enhance its specific properties. Phosphor bronze is widely used in the manufacture of electronic components, connectors, relays, switches, bearings, molds and some mechanical parts due to its excellent wear resistance, corrosion resistance and good electrical and thermal conductivity. The hardness and strength of phosphor bronze are usually lower than those of brass, but its wear resistance and corrosion resistance are better. In the manufacture of PCB drill bits, the phosphor bronze coating can improve the wear resistance and corrosion resistance of the drill bit, thereby extending the life of the drill bit and improving the drilling quality. In addition, the electrical conductivity of phosphor bronze also helps to reduce friction and heat generation during the drilling process, thereby improving drilling efficiency and hole quality. The strengthening layer 52 is a polytetrafluoroethylene layer. Polytetrafluoroethylene is resistant to acids, alkalis, and various organic solvents and is almost insoluble in all solvents. At the same time, polytetrafluoroethylene has the characteristics of high temperature resistance and its friction coefficient is extremely low, so it can be used for lubrication. The lifting layer 53 is a polyetheretherketone layer. Polyetheretherketone is resistant to high temperatures of 260 degrees, has excellent mechanical properties, good self-lubrication, and resistance to chemical corrosion. It has the advantages of flame retardancy, peeling resistance, wear resistance, resistance to strong nitric acid and concentrated sulfuric acid, radiation resistance, and super strong mechanical properties. It can be used in high-end machinery, nuclear engineering, aviation and other technologies. It can also be used as high-temperature resistant structural materials and electrical insulation materials, or composited with glass fiber or carbon fiber to prepare reinforcing materials. The mechanical parts made of its composite materials have a self-lubricating effect.

[0047] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention specification and drawings, or direct / indirect application in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A PCB drill needle that facilitates chip removal, characterized in that: include: Drill shank; a drill bit, disposed on the drill shank, the drill bit comprising a plurality of blades for cutting holes, wherein chip grooves for discharging chips are provided between the plurality of blades; as well as, A lubrication component is arranged on the groove wall of the chip groove, and the lubrication component includes a reinforcement layer, a protective layer and a lubrication layer. The reinforcement layer is used to enhance the hardness of the groove wall of the chip groove, the protective layer is used to enhance the corrosion resistance of the chip groove, and the lubrication layer is used to assist the chip groove in smoothly discharging debris. The reinforcement layer, the protective layer and the lubrication layer are stacked in sequence to enable the chip groove to smoothly discharge debris.

2. The PCB drill needle for convenient chip removal according to claim 1, characterized in that: The material of the reinforcement layer is tungsten disulfide, and the reinforcement layer is used to reduce the loss of the chip groove during chip removal. The material of the protective layer is perfluoropolyether, and the protective layer is used to prevent the chip groove from being corroded. The material of the lubricating layer is molybdenum disulfide, and the lubricating layer is used to enable the chip groove to smoothly discharge chips.

3. The PCB drill needle for convenient chip removal according to claim 1, characterized in that: The thickness of the lubricating component is greater than one micron and less than ten microns.

4. The PCB drill needle for convenient chip removal according to claim 1, characterized in that: The thickness of the protective layer is greater than 0.5 micrometers and less than 5 micrometers.

5. The PCB drill needle for convenient chip removal according to claim 1, characterized in that: The thickness of the protective layer is greater than 0.5 micrometers and less than 5 micrometers.

6. The PCB drill needle for convenient chip removal according to claim 1, characterized in that: The thickness of the lubricating layer is greater than 0.5 micrometers and less than 1 micrometer.

7. The PCB drill needle for convenient chip removal according to claim 1, characterized in that: The plurality of chip removal grooves are centrally symmetrical with respect to the axis of the drill bit.

8. The PCB drill needle for convenient chip removal according to claim 7, characterized in that: The helix angle of the chip flute is 20 to 45 degrees.

9. The PCB drill needle for convenient chip removal according to claim 1, characterized in that: An auxiliary component is provided on the lubricating component, and the auxiliary component includes an auxiliary layer, a strengthening layer and a lifting layer.

10. The PCB drill needle for convenient chip removal according to claim 9, characterized in that: The auxiliary layer is a phosphor bronze layer, the strengthening layer is a polytetrafluoroethylene layer, and the lifting layer is a polyetheretherketone layer.

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