Stably clamping drilling tool

A cutting tool processing and drilling technology, which is applied to drilling tool accessories, manufacturing tools, metal processing equipment, etc., can solve the difficulty of accurately controlling the interference size of the pitch diameter of the thread, difficulty in ensuring the axial and circumferential runout accuracy of the cutter head, Problems such as poor centering ability of the cutter head in the circumferential direction can achieve the effect of increasing clamping repeatability, improving clamping stability and reducing cutting vibration

Active Publication Date: 2019-01-25
ZHUZHOU CEMENTED CARBIDE CUTTING TOOLS CO LTD
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  • Abstract
  • Description
  • Claims
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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 interference size of the pitch diameter 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 centering ability is poor, and the axial positioning surface is completely in contact. When installing in batches, it is difficult to guarantee the axial and circumferential runout accuracy of the cutter head, and the thread interference can only be clamped, and the center cannot be centered.

Method used

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Embodiment Construction

[0043] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0044] Figure 1 to Figure 12 An embodiment of a clamping stable drilling tool according to the invention is shown comprising a cutting part 1 and a clamping part 2 which are symmetrical about a central axis 24 The cutting part 1 includes a cutting part 11 and a connecting part 12 connected to the lower end of the cutting part 11. The clamping part 2 includes a handle 22 and two clamping parts 21 located at the front end of the handle 22. On the cutting part 11 of the cutting part 1 There are two cutting edges, the connecting portion 12 is provided with a plurality of chip pockets 14 penetrating the cutting portion 11, the connecting portion 12 is provided with an outer peripheral surface 13 between adjacent chip pockets 14, and the clamping portion 21 is provided with The spiral groove 25 corresponding to the chip flute 14 and exten...

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Abstract

The invention discloses a stably clamping drilling tool. A projection is spirally twisted into a recess along the direction of a center shaft, an outer circumferential surface is matched with an innercircumferential surface to achieve changing interference magnitude lambda in the cutting part clamping process of a clamping component, and -0.1mm<=lambda<=0.05mm. The drilling tool has the advantages of rapidness in assembly and disassembly, no axial looseness, high positioning precision, simplicity in manufacture, good interchangeability and the like.

Description

technical field [0001] The invention relates to a tool for drilling, in particular to a drilling tool with stable clamping. 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. At present, the commonly used drilling tools are generally assembled by cutting parts and clamping parts. 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 high elasticity. When the cutting parts are worn out, the cutting parts can be replaced separately, which can reduce the cost of drilling. However, this type of tool generally has low positioning accuracy and is easy to fall off, and has a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B51/00
CPCB23B2251/02B23B51/00B23B31/11B23B51/0004B23B51/02
Inventor 江爱胜王社权李屏刘敏项兴东赵志伟
Owner ZHUZHOU CEMENTED CARBIDE CUTTING TOOLS CO LTD
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