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Ultra-precision universal type twist drill

A twist drill and general-purpose technology, applied in twist drills and other directions, can solve the problems of affecting processing accuracy, poor versatility, low production efficiency, etc., and achieve the effects of good versatility, improved accuracy and smoothness, and long service life.

Inactive Publication Date: 2017-12-19
锑玛(苏州)精密工具股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current twist drills often use different types of drills when machining holes on different materials. This is because the existing twist drills are still insufficient in structural design. Therefore, when machining deep holes with high precision requirements, it is usually necessary to replace the tool The rough machining and finishing machining of holes are completed separately, which not only has poor versatility, but also has the disadvantages of wasting time for tool changing, low production efficiency, and affecting machining accuracy.

Method used

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Embodiment

[0026] Example: see attached Figure 1~3 Shown, a kind of ultrafine universal twist drill comprises a shank 1 and a drill bit 2 connected to the front end of the shank; wherein, the drill bit 2 is provided with two blades 3 along the length direction of the twist drill, and two The blades 3 are helically arranged along the circumference of the drill bit 2, and a chip removal groove 4 is provided between the two blades 3; the length of the blade 3 is less than the length of the chip removal groove 4, so as to facilitate chip removal. The two blade lobes 3 are arranged in a helical shape, forming the two chip removal flutes 4 to be opened in a helical shape, and the helical angle is less than 60 degrees.

[0027] The blade backs 5 of the two blades 3 are protrudingly provided with three margins 6-8 along the length direction of the blades 3, and the three margins 6-8 are arranged at intervals, and are divided into sequentially from front to back according to the cutting sequenc...

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Abstract

An ultra-precision universal type twist drill comprises a handle part and a drill bit and is characterized in that two edge segments are arranged on the drill bit, and a chip removing groove is formed between the two edge segments; three edge strips are arranged on the edge back of each edge segment in a protruding mode and distinguished as the first edge strip, the second edge strip and the third strip sequentially according to the cutting order; the protruding height of the first edge strip is smaller than that of the second edge strip, and the protruding height of the second edge strip is smaller than that of the third edge strip; a plurality of sawtooth structures are arranged on each of the first edge strip and the second edge strip; a plurality of sawtooth structures are arranged on the front section of the third edge strip as well, and the rear section of the third edge strip is subjected to edge grinding treatment; and the diameter of the outer edge at the front end of each edge strip is smaller than the diameter of the outer edge at the rear end of each edge strip, and thus at least one cutting step is formed on the drill bit in the length direction of the drill bit. Compared with the prior art, the ultra-precision universal type twist drill can be used for machining steel pieces, cast iron and materials belonging to the types difficult to machine, universality is good, machining hole precision and smooth finish are high, machining stability is good, and the service life of a cutter is long.

Description

technical field [0001] The invention relates to a tool for mechanical processing, in particular to an ultra-precision general-purpose twist drill for processing holes. Background technique [0002] Twist drill can be applied to CNC machining centers, and it is a tool suitable for machining high-precision holes on difficult-to-machine materials such as steel and cast iron. [0003] The current twist drills often use different types of drills when machining holes on different materials. This is because the existing twist drills are still insufficient in structural design. Therefore, when machining deep holes with high precision requirements, it is usually necessary to replace the tool The rough machining and finishing machining of holes are completed separately, which not only has poor versatility, but also has the disadvantages of wasting time for tool changing, low production efficiency, and affecting machining accuracy. [0004] Therefore, how to solve the above-mentioned ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B51/02
CPCB23B51/02
Inventor 吴何洪张济沧张勇强
Owner 锑玛(苏州)精密工具股份有限公司
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