Novel microbit with high hole site precision
By designing a new micro drill bit with main chip drain and short and long and secondary chip drain, the existing micro drill needles have solved the problems of broken knife with small diameter, the blade is not wear-resistant and poor hole position accuracy, achieving higher wear resistance and hole position accuracy, and improving chip drainability.
Patent Information
- Application Number
- CN202420905900.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-28
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-04-28
AI Technical Summary
In the case of small diameter, existing micro drill needles are prone to problems such as cutting blades, not wear resistance on the edges, and poor hole position accuracy. The length of the main and secondary chip drain grooves of the drill needles is consistent, resulting in poor tip rigidity and poor chip drainage at the rear end.
A new type of high-hole position accuracy micro drill bit is designed, including a needle handle and a needle blade. The needle blade is spiraled circumferentially with two main chip drain grooves and short and long secondary chip drain grooves. By adjusting the length and distribution of the chip drain grooves, the rigidity and wear resistance of the needle blade tip are enhanced and the chip drainage resistance at the rear end is improved.
This design significantly improves the wear resistance and hole position accuracy of the drill needle, reduces the needle breakage rate, and optimizes the chip removal performance at the rear end.
Smart Images
Figure CN222807267U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of printed circuit board drilling, in particular to a novel micro drill with high hole position accuracy. Background Art
[0002] With the increasing miniaturization of electronic products, the printed circuit boards (PCBs) that match the products are also developing in the direction of miniaturization and thinness. The line width and line spacing of PCBs are getting narrower and narrower, and the requirements for the position accuracy and drilling quality of PCB drilling processing are getting higher and higher. The drilling quality of PCBs depends largely on the structure of the drill bit itself. Drilling on PCBs generally requires a drill bit with a smaller diameter to achieve the required drilling quality. At present, the micro drill bits on the market are prone to breakage, non-wear-resistant blades, and poor hole position accuracy when drilling when the diameter is small. In addition, the lengths of the main and secondary chip grooves of the drill bit are the same, resulting in poor rigidity of the drill bit tip and poor chip removal at the back end. Utility Model Content
[0003] The technical problem to be solved by the utility model is that the existing micro drills are prone to tool breakage, blade non-wear resistance and poor hole position accuracy when drilling when the diameter is small; and the lengths of the primary and secondary chip grooves of the drill are consistent, resulting in poor rigidity of the drill tip and poor chip removal at the rear end.
[0004] In order to solve the above problems, the utility model provides a novel high hole position precision micro drill, including a needle handle and a needle blade. Two main chip grooves are spirally opened on the needle blade, and the main chip grooves start from the tip of the needle blade and end at the tail of the needle blade; short secondary chip grooves and long secondary chip grooves are spirally opened on the needle blade in sequence, and the short secondary chip groove starts from a first distance s from the tip of the needle blade, and the long secondary chip groove ends at the tail of the needle blade.
[0005] The novel high hole position precision micro drill provided by the utility model also has the following technical features:
[0006] The first distance s is 0.20 mm.
[0007] The short auxiliary chip groove accounts for 20% of the effective cutting length of the needle blade, and the long auxiliary chip groove accounts for 80%-90% of the effective cutting length of the needle blade.
[0008] The needle blade tip is provided with two main blades and two auxiliary blades located at the rear of the two main blades.
[0009] The diameter of the needle blade is 0.10mm-0.45mm.
[0010] The length of the needle blade is 1.20mm-7.00mm.
[0011] The utility model has the following beneficial effects: since there is a first distance s between the starting end of the short auxiliary chip groove 22 and the tip of the needle blade 11, the rigidity of the tip of the needle blade can be enhanced, and the wear resistance has obvious advantages over conventional drill bits, and the needle breakage rate can be reduced and the hole position accuracy can be improved. At the same time, two main chip grooves and a short auxiliary chip groove and a long auxiliary chip groove are provided to make the chip removal performance of the rear end better. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is the front view of the utility model;
[0013] Figure 2 for Figure 1 Side view of
[0014] Figure 3 for Figure 1 A top view of
[0015] Figure 4 for Figure 1 Axonometric drawing of . DETAILED DESCRIPTION
[0016] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.
[0017] like Figures 1 to 4 As shown, the utility model comprises a needle handle 10 and a needle blade 11. Two main chip grooves 21 are circumferentially spirally opened on the needle blade 11. The main chip groove 21 starts from the tip of the needle blade 11 and ends at the tail of the needle blade 11. A short secondary chip groove 22 and a long secondary chip groove 23 are sequentially spirally opened on the needle blade 11. The short secondary chip groove 22 starts from a first distance s from the tip of the needle blade 11, and the long secondary chip groove 23 ends at the tail of the needle blade 11.
[0018] Since the starting end of the short auxiliary chip groove 22 of the utility model is at a first distance s from the tip of the needle blade 11, the rigidity of the tip of the needle blade 11 can be enhanced, and the wear resistance has obvious advantages over conventional drill bits, and the needle breakage rate can be reduced and the hole position accuracy can be improved. At the same time, two main chip grooves 21 and a short auxiliary chip groove 22 and a long auxiliary chip groove 23 are provided to improve the chip removal performance of the rear end.
[0019] The auxiliary chip groove 22 and the long auxiliary chip groove 23 are not cut short within the range of the tip of the needle blade 11 to the first distance s therefrom.
[0020] The short auxiliary chip groove 22 and the long auxiliary chip groove 23 are not connected, but are continuously arranged in the length direction of the needle blade 11 .
[0021] Preferably, the first distance s is 0.20 mm.
[0022] Preferably, the short auxiliary chip groove 22 accounts for 20% of the effective cutting length of the needle blade 11 , and the long auxiliary chip groove 23 accounts for 80%-90% of the effective cutting length of the needle blade 11 .
[0023] The effective cutting length of the needle blade 11 is the total length of the needle blade 11 occupied by the short auxiliary chip groove 22 and the long auxiliary chip groove 23 .
[0024] Preferably, the tip of the needle blade 11 is provided with two main blades 12 and two secondary blades 13 located at the rear of the two main blades 12 .
[0025] Preferably, the diameter of the needle blade 11 is 0.10 mm-0.45 mm.
[0026] Preferably, the length of the needle blade 11 is 1.20 mm-7.00 mm.
[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.
Claims
1. A novel high hole position precision micro drill, comprising a needle handle (10) and a needle blade (11), characterized in that: Two main chip removal grooves (21) are formed in a circumferential spiral on the needle blade (11), the main chip removal groove (21) starts from the tip of the needle blade (11) and ends at the tail of the needle blade (11); a short auxiliary chip removal groove (22) and a long auxiliary chip removal groove (23) are formed in sequence in a circumferential spiral on the needle blade (11), the short auxiliary chip removal groove (22) starts from a first distance s from the tip of the needle blade (11), and the long auxiliary chip removal groove (23) ends at the tail of the needle blade (11).
2. The novel high hole position precision micro drill according to claim 1 is characterized in that: The first distance s is 0.20 mm.
3. The novel high hole position precision micro drill according to claim 1 is characterized in that: The short auxiliary chip groove (22) accounts for 20% of the effective cutting length of the needle blade (11), and the long auxiliary chip groove (23) accounts for 80%-90% of the effective cutting length of the needle blade (11).
4. The novel high hole position precision micro drill according to claim 1 is characterized in that: The tip of the needle blade (11) is provided with two main blades (12) and two secondary blades (13) located at the rear of the two main blades (12).
5. The novel high hole position precision micro drill according to claim 1 is characterized in that: The diameter of the needle blade (11) is 0.10 mm-0.45 mm.
6. The novel high hole position precision micro drill according to claim 1 is characterized in that: The length of the needle blade (11) is 1.20 mm-7.00 mm.