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
CN102490213AInactive
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Estimated Expiration
Not applicable · inactive patent

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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.
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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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