Four-groove gang drill

A technology of auxiliary discharge and chip removal groove, applied in the field of four-groove drilling, can solve the problems of affecting the processing quality, easy drilling deviation, inaccurate positioning, etc. Effect

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  • Abstract
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AI Technical Summary

Problems solved by technology

The drill point with this structure has no cutting edge, the resistance is large during cutting, the positioning is not accurate, the drilling is easy to deviate, and it cannot protect the hole; the chip removal effect is not good through the spiral chip removal flute, which affects the hole surface roughness, the inner wall is not smooth, and even burrs appear, which affects the processing quality

Method used

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  • Four-groove gang drill
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  • Four-groove gang drill

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with accompanying drawing:

[0015] like figure 1 , figure 2 , image 3 As shown, the four flute row drill is composed of a cutting part 1 and a shank part 2 connected in sequence. The cutting part 1 is provided with two helical chip removal flutes 3, and the part between the helical chip removal flutes 3 forms a cutter body 4. A positioning tip 5 protrudes in the middle of the front end of the cutting part 1, and the positioning tip 5 is surrounded by four inclined positioning surfaces 6, and the edges where the four inclined positioning surfaces 6 intersect form a positioning edge 7, and the positioning tip 5 is symmetrically arranged outwardly. Two downward steep slopes 8, the slope 8 and the groove bottom of the spiral chip flute 3 form an end edge 9, and the end edge 9 and the outer peripheral surface of the cutting part 1 form two outer sharps 10. The body 4 is provided with a spiral auxiliar...

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PUM

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Abstract

The invention discloses a four-groove gang drill which comprises a cutting part (1) and a shank (2) that are connected in sequence. Two spiral chip grooves (3) are formed on the cutting part (1), the part between the spiral chip grooves (3) forms a cutter body (4), a positioning tip (5) is protruded from the center at the front end of the cutting part (1) and formed by four inclined positioning surfaces (6), the prismatic intersection of the four inclined positioning surfaces (6) forms a positioning edge (7), two downwardly sheer inclined surfaces (8) in outward symmetry are formed on the positioning tip (5), the inclined surfaces (8) and the groove bottoms of the spiral chip grooves (3) form end edges (9), the end edges (9) and the peripheral surface of the cutting part (1) form two outer side tips (10), and spiral auxiliary chip grooves (11) are formed on the cutter body (4). The invention has the following benefits: chip removal effect is good, and processing surface quality is improved; service life is prolonged; positioning is accurate, and drill offset is avoided; and assembly and disassembly are simple and convenient.

Description

technical field [0001] The invention relates to the technical field of woodworking row drills, in particular to a four-slot row drill. Background technique [0002] Woodworking row drill is a kind of furniture manufacturing machinery. There are many types and are widely used. The existing row drill structure mostly has a drill tip protruding from the middle, and the drill tip extends symmetrically to the outside with two conical surfaces. The flutes form the end edges, and the cutter body is formed between adjacent helical flutes. The drill point with this structure has no cutting edge, the resistance is large during cutting, the positioning is not accurate, the drilling is easy to deviate, and it cannot protect the hole; the chip removal effect is not good through the spiral chip removal flute, which affects the hole surface The roughness makes the inner wall not smooth, and even burrs appear, which affects the processing quality. Contents of the invention [0003] The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27C3/04B27G15/00
Inventor 邓德勇
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