Combined spiral-grooved twist drill
A twist drill and helical groove technology, applied in twist drills, drill accessories, drilling/drilling equipment, etc., can solve the problems of complex drill grinding process, great influence on drill life, easy wear of drill, etc. The effect of processing cost, reduction of drilling force, and convenient chip removal
Inactive Publication Date: 2017-08-08
李仕清
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- Application Information
AI Technical Summary
Problems solved by technology
However, during the processing, the drill bit is very easy to wear, and the cutting force, processing temperature, chip removal, etc. during the processing have a great impact on the life of the drill bit
The Ni Zhifu drill that appeared in the last century changed the ordinary twist drill with "one point and three blades" into a new type of drill with "three points and seven blades", which can effectively improve the processing efficiency and the life of the drill bit, but the grinding process of the drill bit is complicated
Method used
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Effect test
Embodiment 1
[0016] The compound spiral groove twist drill refers to opening a small spiral groove on the edge of the rake face of the original twist drill.
Embodiment 2
[0018] For twist drills with a diameter of less than 20 mm, a spiral groove with a width of 1-3 mm and a depth of 0.1-0.9 mm is opened on the edge of the rake face, and the others are the same as in Embodiment 1.
Embodiment 3
[0020] For twist drills with a diameter of more than 20mm, open two more helical grooves near the core, and the others are the same as in Embodiment 2.
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The invention discloses a combined spiral-grooved twist drill and belongs to the field of mechanical design. The combined spiral-grooved twist drill is mainly characterized in that a small spiral groove is formed in the edge of a front tool face of an original twist drill. The combined spiral-grooved twist drill has the following beneficial effects that as the small spiral groove is formed in the edge of the front tool face, the length of a main cutting edge can be increased, cuttings can be separated, accordingly, chip removal is facilitated, abrasion of a drill bit is reduced, and the machining cost is lowered; and meanwhile, the drilling force and the machining temperature of the twist drill can be effectively reduced. The combined spiral-grooved twist drill is simple to restructure, low in manufacturing cost and remarkable in benefit, and the cutting force, the cutting temperature, chip removal and the like in the machining process are obviously improved, so that the combined spiral-grooved twist drill is suitable for large-area popularization.
Description
Technical field: [0001] The invention relates to the field of mechanical design, in particular to a compound helical flute twist drill. Background technique: [0002] In mechanical manufacturing, drilling is an essential and very common processing procedure, which accounts for a large proportion in metal cutting, second only to turning. The main tool for drilling holes in solid materials is the twist drill. However, during the processing, the drill bit is very easy to wear, and the cutting force, processing temperature, chip removal, etc. during the processing have a great impact on the life of the drill bit. The Ni Zhifu drill that appeared in the last century changed the ordinary twist drill with "one point and three blades" into a new type of drill with "three points and seven blades", which can effectively improve the processing efficiency and the life of the drill bit, but the grinding process of the drill bit is complicated. Invention content: [0003] The purpose ...
Claims
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IPC IPC(8): B23B51/02
CPCB23B51/02B23B2251/14
Inventor 李仕清
Owner 李仕清