Double-guide gun drill
By designing a dual-guiding structure in the gun drill tool, increasing the guide length and balanced centrifugal force, the problem that existing gun drills are difficult to meet the requirements of high-precision deep hole processing is solved, and a more stable and accurate drilling process is achieved.
Patent Information
- Application Number
- CN202421598822.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-08
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-07-08
AI Technical Summary
The existing gun drilling tools are difficult to meet the high-precision requirements for deep hole processing at this stage, especially in terms of skewness and inner hole roughness.
A dual-guided gun drill is designed, and the guide length and balanced centrifugal force are increased by providing a first guide cylinder and a second guide cylinder in the drill bit, and structural improvements such as inverted cone treatment and coolant outlet holes.
By increasing the guide length and balanced centrifugal force, the deviation and sway of the drill bit are reduced, the stability and accuracy of the drill hole are improved, and the technical requirements of gun drilling processing are met at this stage.
Smart Images
Figure CN222767354U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gun drills, in particular to a double-guide gun drill. Background Art
[0002] Gun drill is a highly efficient tool for deep hole processing. Due to its special tool head structure, it has the advantages of self-guiding, smoothing the hole wall, and good chip breaking in deep hole processing, and is increasingly widely used.
[0003] With the advancement of science and technology, the requirements for the precision of deep hole processing of parts in the fields of aerospace, aviation, coal mining machinery, hydraulics, etc. are getting higher and higher. The deflection index has been increased from 1‰ of the hole depth to 0.3‰, and the inner hole roughness has been increased from Ra0.8-Ra1.6 to Ra0.4-Ra0.8. The existing gun drill tools are difficult to meet the current manufacturing requirements. Utility Model Content
[0004] The technical problem to be solved by the utility model is that the existing gun drill tools are difficult to meet the manufacturing requirements at the current stage.
[0005] In order to solve the above problems, the technical solution of the utility model is: a double-guide gun drill, including a drill bit, a drill rod and a drill shank, the drill bit includes a first guide cylinder and a second guide cylinder, and the outer circles of the first guide cylinder and the second guide cylinder are both processed by a back cone, a cutting edge is provided at the end of the first guide cylinder, and a first coolant outlet hole and a second coolant outlet hole are opened on the end face of the first guide cylinder.
[0006] Furthermore, the first guide cylinder and the second guide cylinder have the same length and are integrally formed by turning.
[0007] Furthermore, the first guide cylinder and the second guide cylinder are provided with a first chip removal groove, and the angle of the first chip removal groove is 120°-160°.
[0008] Furthermore, the inverted taper of the first guide cylinder is 0.02-0.03 mm, and the inverted taper of the second guide cylinder is 0.03-0.04 mm.
[0009] Furthermore, a third coolant outlet hole is provided at one end of the drill rod close to the drill bit, and a second chip removal groove 202 is provided on the drill rod 2 .
[0010] The advantages of the utility model compared with the existing technology are: the utility model doubles the guide length by setting the first guide cylinder and the second guide cylinder, which can reduce the deviation and swing of the drill bit; the inverted cone shape can help balance the effect of centrifugal force, reduce vibration and deviation, improve the stability and accuracy of drilling, and meet the technical requirements of gun drilling processing at this stage. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is the main structural diagram of the utility model.
[0012] Figure 2 It is a structural diagram of the drill bit of the utility model.
[0013] Figure 3 It is a structural diagram of the cutting edge of the utility model.
[0014] As shown in the figure: 1. Drill bit; 101. First guide cylinder; 102. Second guide cylinder; 103. Cutting edge; 104. First coolant outlet hole; 105. Second coolant outlet hole; 106. First chip groove; 2. Drill rod; 201. Third coolant outlet hole; 202. Second chip groove; 3. Drill shank. DETAILED DESCRIPTION
[0015] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0016] like Figure 1 to Figure 2 As shown, the double-guide gun drill includes a drill bit 1, a drill rod 2 and a drill shank 3.
[0017] The drill bit 1 includes a first guide cylinder 101 and a second guide cylinder 102. The first guide cylinder 101 and the second guide cylinder 102 have the same length and are integrally turned. The outer circles of the first guide cylinder 101 and the second guide cylinder 102 are both tapered. The inverted taper of the first guide cylinder 101 is 0.02-0.03mm, and the inverted taper of the second guide cylinder 102 is 0.03-0.04mm.
[0018] A cutting edge 103 is provided at the end of the first guide cylinder 101, and a first coolant outlet hole 104 and a second coolant outlet hole 105 are opened on the end surface of the first guide cylinder 101. A first chip groove 106 is provided on the first guide cylinder 101 and the second guide cylinder 102, and the angle of the first chip groove 106 is 120°-160°.
[0019] A third coolant outlet 201 is provided at one end of the drill rod 2 close to the drill bit 1 , and a second chip removal groove 202 is provided on the drill rod 2 .
[0020] In specific use, by setting the first guide cylinder 101 and the second guide cylinder 102, the guide length is doubled, which can reduce the deviation and swing of the drill bit, reduce the vibration and vibration during the drilling process, thereby improving the efficiency and safety of drilling. At the same time, by increasing the guide length, the inclination angle and direction of the drilling can be better controlled, so that the drilling is carried out along a specific path. During the drilling process, the drill bit 1 will be subjected to a certain centrifugal force when rotating at a high speed. The inverted cone shape can help balance the effect of the centrifugal force, reduce vibration and deviation, and improve the stability and accuracy of the drilling.
[0021] After a large number of deep hole processing verifications, due to the lengthening of the guide cylinder, the deep hole processing deflection, hole diameter size accuracy, etc. have been greatly improved, meeting the current technical requirements of gun drilling processing.
[0022] The undisclosed parts in the present invention are all prior art, and their specific structures and working principles are not described in detail.
[0023] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
[0025] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.
Claims
1. A double-guide gun drill, comprising a drill bit (1), a drill rod (2) and a drill shank (3), characterized in that: The drill bit (1) comprises a first guide cylinder (101) and a second guide cylinder (102), and the outer circles of the first guide cylinder (101) and the second guide cylinder (102) are both processed by inverted taper, a cutting edge (103) is provided at the end of the first guide cylinder (101), and a first coolant outlet hole (104) and a second coolant outlet hole (105) are opened on the end surface of the first guide cylinder (101).
2. The dual guide gun drill according to claim 1, characterized in that: The first guide cylinder (101) and the second guide cylinder (102) have the same length and are integrally formed by turning.
3. The dual guide gun drill according to claim 1, characterized in that: The first guide cylinder (101) and the second guide cylinder (102) are provided with a first chip removal groove (106), and the angle of the first chip removal groove (106) is 120°-160°.
4. The dual guide gun drill according to claim 1, characterized in that: The inverted taper of the first guide cylinder (101) is 0.02-0.03 mm, and the inverted taper of the second guide cylinder (102) is 0.03-0.04 mm.
5. The dual guide gun drill according to claim 1, characterized in that: A third coolant outlet hole (201) is provided at one end of the drill rod (2) close to the drill bit (1), and a second chip removal groove (202) is provided on the drill rod (2).