Drilling tool
A cutting tool processing and drilling technology, which is applied in the direction of drilling tool accessories, tool joints, manufacturing tools, etc., can solve the problem that it is difficult to guarantee the runout accuracy of the cutter head in the axial and circumferential directions, and it is difficult to accurately control the interference size of the pitch diameter of the thread. Problems such as poor centripetal ability of the head circumference, to achieve the effect of increasing the interference contact area, accurate centering, positioning strength and high precision
Pending Publication Date: 2022-01-21
ZHUZHOU CEMENTED CARBIDE CUTTING TOOLS CO LTD
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- Application Information
AI Technical Summary
Problems solved by technology
When the thread interference clamping is used, although the thread interference clamping can be realized, it is difficult to accurately control the pitch diameter interference size of the thread. At the same time, the thread interference position occurs on both sides of the thread profile, and the contact area is small. The ability is poor, the axial positioning surface is in full contact, and it is difficult to guarantee the axial and circumferential runout accuracy of the cutter head during mass installation, and the thread interference can only realize the clamping of the cutting parts, and cannot be centered
Method used
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[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0037] Figure 1 to Figure 13An embodiment of the drilling tool of the present invention is shown, which comprises a cutting part 1 and a clamping part 2, which are symmetrical about the central axis 9 of the split drilling tool , the cutting part 1 includes a cutting part 11 and a connecting part 12, the clamping part 2 includes a clamping part 21 and a handle 22, the connecting part 12 and the clamping part 21 cooperate to realize the connection between the cutting part 1 and the clamping part 2, and the connecting part The outer peripheral surface 121 of 12 is provided with a spiral recess 122, the end surface of the connecting part 12 is provided with a positioning boss 13 coaxial with the outer peripheral surface 121, and the inner peripheral surface 211 of the clamping part 21 is provided with a spiral protrusion 212, The botto...
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The invention discloses a drilling tool. A cutting component comprises a cutting portion and a connecting portion; a clamping component comprises a clamping portion and a handle portion; the connecting portion and the clamping portion are matched to realize connection of the cutting component and the clamping component; a spiral recess is formed in the outer peripheral surface of the connecting portion; a positioning boss coaxial with the outer peripheral surface is arranged on the end surface of the connecting portion; a spiral projection is arranged on the inner peripheral surface of the clamping portion; a positioning inner hole coaxial with the inner peripheral surface is formed in the bottom surface of the clamping portion; when the cutting component and the clamping component are assembled in place, the spiral recess is matched with the spiral projection, and the outer peripheral surface and the inner peripheral surface are in interference fit; and the outer cylindrical surface of the positioning boss and the inner cylindrical surface of the positioning inner hole are in interference fit, and have an interference magnitude t, and t is greater than or equal to 0.005 mm and smaller than or equal to 0.01 mm. The drilling tool has such advantages as convenience for loading and unloading, high positioning precision, stability and reliability.
Description
technical field [0001] The invention mainly relates to the field of metal cutting, in particular to a drilling tool. Background technique [0002] In drilling, in order to prolong the service life of the cutting part, relatively expensive cemented carbide or similar materials are usually used as tool materials. Due to the high hardness and good wear resistance of such materials, processing is extremely difficult, which makes Drilling tool material costs and processing costs are high. [0003] In the prior art, drilling tools are generally assembled by cutting parts and clamping parts, wherein the cutting parts are made of hard alloy or similar materials with high hardness and strong wear resistance, while the clamping parts are made of Made of highly elastic material, when the cutting parts are worn out, the cutting parts can be replaced separately, thus reducing the cost of drilling. However, such tools generally adopt a two-piece clamping structure, and use the elastic d...
Claims
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Patent Timeline
Login to View More IPC IPC(8): B23B51/00B23B51/12
CPCB23B51/00B23B51/12Y02P70/10
Inventor 江爱胜向良雄项兴东刘伟文娟蒋松松
Owner ZHUZHOU CEMENTED CARBIDE CUTTING TOOLS CO LTD