single short-slot cobalt pin

Abstract

A single short flute cobalt drill bit comprises a holding section and a working section connected to the holding section, the working section comprises a drill tip and a chip flute section between the drill tip and the holding section, a single long flute, a single short flute and an escape flute are formed on the chip flute section, one end of the single long flute, the single short flute and the escape flute are communicated with the drill tip, the other end of the single long flute, the single short flute and the escape flute extends to the direction of the holding section in a spiral shape on the chip flute section, the flute width of the single short flute is larger than the flute width of the escape flute, on the chip flute section, the escape flute and the single short flute are communicated with the single long flute, the position where the escape flute intersects with the single long flute is closer to the drill tip than the position where the single short flute intersects with the single long flute. The single short flute cobalt drill bit can easily discharge the residual chips in the short flute.

Description

Technical Field

[0001] This utility model relates to the field of PCB cobalt pin technology, and in particular to a single short-slot cobalt pin. Background Technology

[0002] Printed circuit boards (PCBs) are essential components in various electronic products. With the miniaturization of electronic products, the manufacturing process of PCBs has become increasingly sophisticated. In PCB manufacturing, cobalt pins are typically used to process multiple PCBs simultaneously in a multi-layer stacking manner. In existing technology, to facilitate the removal of processing debris, long slots, short slots, and clearances are generally incorporated into the cobalt pins. Clearances reduce frictional heat generation, short slots increase the chip capacity of the cobalt pins, and long slots facilitate the removal of debris.

[0003] However, to ensure strength, the depth of the short groove typically decreases gradually after extending a certain distance, eventually becoming flush with the surface of the cobalt needle. In practice, it has been found that when processing printed circuit boards using these cobalt needles, debris accumulates within the short groove and cannot be effectively removed. This limits the number of layers that can be stacked on the printed circuit board, hindering processing efficiency. Utility Model Content

[0004] To address the aforementioned problems, this invention provides a single short-groove cobalt needle that can more easily remove debris from the short groove.

[0005] This utility model provides a single short-groove cobalt needle, characterized in that it includes a clamping section and a working section connected to the clamping section. The working section includes a drill tip and a chip removal section. The chip removal section is located between the drill tip and the clamping section. A single long groove, a single short groove, and an escape gap are formed on the chip removal section. One end of each of the single long groove, the single short groove, and the escape gap is connected to the drill tip, and the other end extends spirally on the chip removal section in the direction of the clamping section. The width of the single short groove is greater than the width of the escape gap. On the chip removal section, both the escape gap and the single short groove are connected to the single long groove. The position where the escape gap intersects with the single long groove is closer to the drill tip than the position where the single short groove intersects with the single long groove.

[0006] Furthermore, the single long groove, the single short groove, and the escape gap have the same helical direction.

[0007] Furthermore, the leads of the single short slot, the escape gap, and the single long slot are all different.

[0008] Furthermore, the distance between the intersection of the escape gap and the single long groove and the drill tip accounts for 12%-25% of the total length of the working section.

[0009] Furthermore, the distance from the intersection of the single short groove and the single long groove to the drill tip accounts for 15%-40% of the total length of the working section.

[0010] Furthermore, the depth of the single short groove is not greater than the depth of the single long groove.

[0011] Furthermore, the outer diameter of the working section is 0.1-1.0 mm, and the depth of the single short groove and the single long groove accounts for 12%-50% of the outer diameter of the working section.

[0012] Furthermore, the depth of the escape gap is less than the depth of the single short groove, and the depth of the escape gap accounts for 3%-8% of the outer diameter of the working section.

[0013] Furthermore, the width of the escape gap is 10%-50% of the width of the single short slot.

[0014] Furthermore, a centerline is formed at the end of the drill tip, and a cutting edge is formed on one side of the centerline. The single long groove is formed on the side of the centerline where the cutting edge is located. A cutting auxiliary surface is formed on the side of the centerline away from the cutting edge. One end of the cutting auxiliary surface is connected to the centerline, and the other end extends toward the edge of the drill tip. A clearance is formed between the centerline at the end where the cutting edge is located and the cutting auxiliary surface. The single short groove is formed between the centerline at the end where the cutting edge is not located and the cutting auxiliary surface.

[0015] In this invention, the single short groove and the escape clearance are designed to connect with the single long groove after extending a certain length, and the connection position between the single short groove and the single long groove is further back than the connection position between the escape clearance and the single long groove. Since the width of the single short groove is greater than the width of the escape clearance, during operation, most of the cuttings generated by the drill tip are discharged towards the clamping section through the single long groove; another portion of the cuttings enters the single short groove and is discharged towards the clamping section. The escape clearance reduces the generation of frictional heat, and simultaneously, a small amount of cuttings entering the escape clearance can enter the single long groove through the escape clearance. Furthermore, since the connection position between the single short groove and the single long groove is further back than the connection position between the escape clearance and the single long groove, a small amount of cuttings in the escape clearance can enter the single long groove more smoothly before the single short groove, preventing overheating of the drill tip caused by the cuttings in the single short groove obstructing the cuttings in the escape clearance. Furthermore, since the debris in the short slot can be discharged into the long slot, this accelerates the removal of debris from the short slot and prevents its accumulation. Through this method, the number of PCB boards stacked can be maximized during processing, improving work efficiency.

[0016] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 The image shown is a first-view axial side structural diagram of the single short-groove cobalt needle provided in an embodiment of this utility model.

[0019] Figure 2 As shown Figure 1 A schematic diagram of the axial structure of a single short-groove cobalt needle from a second perspective.

[0020] Figure 3 As shown Figure 1 A frontal view of the drill tip of a single-short-groove cobalt needle.

[0021] Reference numerals: 10, clamping section; 20, working section; 21, drill tip; 211, center line; 212, cutting edge; 213, auxiliary cutting face; 22, chip removal section; 221, single long groove; 222, single short groove; 223, clearance. Detailed Implementation

[0022] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0023] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0024] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar attributes, not to indicate or imply relative importance or a specific order.

[0026] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0027] This invention provides a single short-groove cobalt needle that can easily remove debris from the short groove.

[0028] like Figures 1 to 3 As shown, the single short-groove cobalt needle provided in this embodiment of the present invention includes a clamping section 10 and a working section 20 connected to the clamping section 10. During operation, the single short-groove cobalt needle can be fixed to the jaws of a drilling machine through the clamping section 10, and then the workpiece can be processed through the working section 20.

[0029] The working section 20 includes a drill tip 21 and a chip removal section 22, with the drill tip 21 connected to the clamping section 10 via the chip removal section 22. In other words, the drill tip 21 is located at the end of the chip removal section 22 away from the clamping section 10.

[0030] The cobalt needle has a single long groove 221, a single short groove 222, and an escape gap 223 formed on the chip removal section 22. One end of each of the single long groove 221, single short groove 222, and escape gap 223 is connected to the drill tip 21, and the other end extends spirally on the chip removal section 22 towards the clamping section 10. The width of the single short groove 222 is greater than the width of the escape gap 223. On the chip removal section 22, both the escape gap 223 and the single short groove 222 are connected to the single long groove 221. That is, during the spiral extension of the single short groove 222 and the escape gap 223, they will intersect with the single long groove 221. The position where the escape gap 223 intersects with the single long groove 221 is closer to the drill tip 21 than the position where the single short groove 222 intersects with the single long groove 221. Figure 1 The diagram illustrates the structure when the escape gap 223 intersects with the single long slot 221. Figure 2 The diagram illustrates the structure when a single short slot 222 intersects with a single long slot 221.

[0031] In this embodiment, the single short groove 222 and the escape gap 223 are both connected to the single long groove 221 after extending for a certain length, and the connection position between the single short groove 222 and the single long groove 221 is further back than the connection position between the escape gap 223 and the single long groove 221. Since the width of the single short groove 222 is greater than the width of the escape gap 223, during operation, most of the debris generated by the drill tip 21 is discharged through the single long groove 221 towards the clamping section 10; another portion of the debris enters the single short groove 222 and is discharged towards the clamping section 10; the escape gap 223 can reduce the generation of frictional heat, and at the same time, a small amount of debris entering the escape gap 223 can enter the single long groove 221 through the escape gap 223. Furthermore, since the connection position between the single short groove 222 and the single long groove 221 is further back than the connection position between the escape gap 223 and the single long groove 221... Therefore, a small amount of residual material in the escape gap 223 can enter the single long groove 221 more smoothly than the single short groove 222, preventing the drill tip 21 from overheating due to the residual material in the single short groove 222 obstructing the residual material in the escape gap 223. Furthermore, since the residual material in the single short groove 222 can be discharged into the single long groove 221, this accelerates the discharge of residual material from the single short groove 222, preventing the accumulation of residual material in the single short groove 222. Through the above methods, the number of PCB boards stacked can be maximized during processing, improving work efficiency. Furthermore, to facilitate chip removal in this embodiment, the single long groove 221, the single short groove 222, and the escape gap 223 have the same helical direction.

[0032] In this embodiment, the single short slot 222 and the escape gap 223 can each have a different lead than the single long slot 221, so that the single short slot 222 and the escape gap 223 can intersect with the single long slot 221. In other embodiments, the extension direction of the spiral can also be slightly changed near the intersection of the single short slot 222 and the escape gap 223 with the single long slot 221, so that the single short slot 222 and the escape gap 223 intersect with the single long slot 221.

[0033] Furthermore, in this embodiment, the length of the escape gap 223, that is, the distance from the intersection of the escape gap 223 and the single long groove 221 to the drill tip 21, accounts for 12%-25% of the total length of the entire working section 20. The length of the single short groove 222, that is, the distance from the intersection of the single short groove 222 and the single long groove 221 to the drill tip 21, accounts for 15%-40% of the entire working section 20. In other words, in most parts of the working section 20, only the single long groove 221 is provided.

[0034] Further, in this embodiment, the outer diameter of the working section 20 can be 0.1-1.0 mm. The depth of the single short groove 222 is not greater than the depth of the single long groove 221. In other embodiments, the depth of the single short groove 222 can be the same as that of the single long groove 221. The depth of the single short groove 222 and the single long groove 221 accounts for 12%-50% of the outer diameter of the working section 20. The depth of the escape gap 223 is less than the depth of the single short groove 222, and the depth of the escape gap 223 accounts for 3%-8% of the outer diameter of the working section 20.

[0035] The width of the single short groove 222 is no greater than the width of the single long groove 221. The width of the escape gap 223 is 10%-50% of the width of the single short groove 222.

[0036] Further, please continue to refer to Figure 3 In this embodiment, a centerline 211 is formed at the end of the drill tip 21, and a cutting edge 212 is formed on one side of the centerline 211. A single long groove 221 is formed on the side of the centerline 211 where the cutting edge 212 is located. A cutting auxiliary surface 213 is formed on the side of the centerline 211 away from the cutting edge 212. One end of the cutting auxiliary surface 213 is connected to the centerline 211, and the other end extends towards the edge of the drill tip 21. A clearance 223 is formed between the centerline 211 at the end where the cutting edge 212 is located and the cutting auxiliary surface 213, while a single short groove 222 is formed between the centerline 211 at the end where the cutting edge 212 is located and the cutting auxiliary surface 213. That is, as shown... Figure 3 As shown, in a clockwise direction, a single long slot 221, an escape gap 223, and a single short slot 222 are arranged in sequence.

[0037] In this invention, the single short groove 222 and the escape gap 223 are both connected to the single long groove 221 after extending for a certain length, and the connection position between the single short groove 222 and the single long groove 221 is further back than the connection position between the escape gap 223 and the single long groove 221. Since the width of the single short groove 222 is greater than the width of the escape gap 223, during operation, most of the debris generated by the drill tip 21 is discharged through the single long groove 221 towards the clamping section 10; another portion of the debris enters the single short groove 222 and is discharged towards the clamping section 10. The escape gap 223 can reduce the generation of frictional heat, and at the same time, a small amount of debris entering the escape gap 223 can enter the single long groove 221 through the escape gap 223. Furthermore, since the connection position between the single short groove 222 and the single long groove 221 is further back than the connection position between the escape gap 223 and the single long groove 221. Therefore, a small amount of residual material in the escape gap 223 can enter the long slot 221 more smoothly than the short slot 222, preventing the drill tip 21 from overheating due to the residual material in the short slot 222 obstructing the residual material in the escape gap 223. Furthermore, since the residual material in the short slot 222 can be discharged into the long slot 221, this accelerates the discharge of residual material from the short slot 222, preventing its accumulation. Through these methods, the number of PCB boards stacked can be maximized during processing, improving work efficiency.

[0038] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A single short-groove cobalt needle, characterized in that: The system includes a clamping section and a working section connected to the clamping section. The working section includes a drill tip and a chip removal section. The chip removal section is located between the drill tip and the clamping section. A single long groove, a single short groove, and an escape clearance are formed on the chip removal section. One end of each of the single long groove, the single short groove, and the escape clearance is connected to the drill tip, and the other end extends spirally on the chip removal section towards the clamping section. The width of the single short groove is greater than the width of the escape clearance. On the chip removal section, both the escape clearance and the single short groove are connected to the single long groove. The position where the escape clearance intersects with the single long groove is closer to the drill tip than the position where the single short groove intersects with the single long groove.

2. The single short-groove cobalt needle according to claim 1, characterized in that: The single long groove, the single short groove, and the escape gap have the same helical direction.

3. The single short-groove cobalt needle according to claim 1, characterized in that: The leads of the single short slot, the escape gap, and the single long slot are all different.

4. The single short-groove cobalt needle according to claim 1, characterized in that: The distance between the intersection of the escape gap and the single long groove and the drill tip accounts for 12%-25% of the total length of the working section.

5. The single short-groove cobalt needle according to claim 4, characterized in that: The distance between the intersection of the single short groove and the single long groove and the drill tip accounts for 15%-40% of the total length of the working section.

6. The single short-groove cobalt needle according to claim 1, characterized in that: The depth of the single short groove is not greater than the depth of the single long groove.

7. The single short-groove cobalt needle according to claim 6, characterized in that: The outer diameter of the working section is 0.1-1.0 mm, and the depth of the single short groove and the single long groove accounts for 12%-50% of the outer diameter of the working section.

8. The single short-groove cobalt needle according to claim 7, characterized in that: The depth of the escape gap is less than the depth of the single short groove, and the depth of the escape gap accounts for 3%-8% of the outer diameter of the working section.

9. The single short-groove cobalt needle according to claim 1, characterized in that: The width of the escape gap is 10%-50% of the width of the single short slot.

10. The single short-groove cobalt needle according to claim 1, characterized in that: A centerline is formed at the end of the drill tip, and a cutting edge is formed on one side of the centerline. A single long groove is formed on the side of the centerline where the cutting edge is located. A cutting auxiliary surface is formed on the side of the centerline away from the cutting edge. One end of the cutting auxiliary surface is connected to the centerline, and the other end extends toward the edge of the drill tip. A clearance is formed between the centerline at the end where the cutting edge is located and the cutting auxiliary surface. A single short groove is formed between the centerline at the end where the cutting edge is not located and the cutting auxiliary surface.

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