CN102896365A

CN102896365A - Forwards and backwards guided hole expanding drill

Info

Publication number: CN102896365A
Application number: CN2012103357346A
Authority: CN
Inventors: 宋培德; 邓红花
Original assignee: Jiangxi Hongdu Aviation Industry Group Co Ltd
Current assignee: Jiangxi Hongdu Aviation Industry Group Co Ltd
Priority date: 2012-09-12
Filing date: 2012-09-12
Publication date: 2013-01-30

Abstract

The invention relates to a forwards and backwards guided hole expanding drill. The front tool nose cutting blade of the forwards and backwards guided hole expanding drill with a single-end clamped hole expanding drill and a double-end clamped hole expanding drill is of an elongated structure; the front tool nose cutting blade length m is 6-10 times the front tool nose cutting blade length n of the conventional standard forwards and backwards guided hole expanding drill. The front tool nose cutting blade length m is increased to that m is equal to 3-5mm, the tool nose strength is improved, the heat radiation area is increased, and factors resulting in over cutting heat so that the tool nose is burnt up, and overlarge cutting force of the tool nose so that the cutter is discarded because the blade is broken, are avoided, thus the durability of the cutter is greatly improved.

Description

The reamer of a kind of front and back guiding

Technical field

The present invention relates to a kind of metal cutting processing broad, particularly a kind of reamer of front and back guiding.

Background technology

When before and after metal cutting processing reaming is used, guiding the reamer machining; Cutting edge length n=0.5mm before the front and back of the general standard guiding reamer point of a knife produces easily the too concentrated difficult heat radiation of heat in metal cutting, point of a knife undercapacity and produces that wearing and tearing are accelerated, tipping causes cutter to be scrapped.

Summary of the invention

The technical problem to be solved in the present invention provides a kind of reamer that improves point of a knife intensity and strengthen the high durability front and back guiding of area of dissipation.

For solving the problems of the technologies described above, technical scheme of the present invention is: guiding reamer before and after a kind of high durability, cutting edge is the extended type structure before the front and back guiding reamer point of a knife of the reamer that the reamer that single head clamps and double end clamp, and the 6-10 that the cutting edge length m equals cutting edge length n before the front and back guiding reamer point of a knife of existing standard before the point of a knife doubly.

The cutting edge length m is increased to m=3-5mm before the described point of a knife, improves point of a knife intensity and strengthens area of dissipation, avoids burning and point of a knife cutting force produces the factor that tipping is scrapped cutter too greatly because of the overheated generation point of a knife of heat in metal cutting, thereby greatly improves cutting wear.

The invention has the beneficial effects as follows:The present invention increases cutting edge length before the point of a knife, improves point of a knife intensity and strengthens area of dissipation, avoids burning and point of a knife cutting force produces the factor that tipping is scrapped cutter too greatly because of the overheated generation point of a knife of heat in metal cutting, thereby greatly improves tool life 6-10 times.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is the structural representation of the reamer of single head clamping.

Fig. 2 is the left view of Fig. 1.

Fig. 3 is the A of the present invention section enlarged drawing of Fig. 1.

Fig. 4 is the enlarged drawing of the front cutting edge of existing standard front and back guiding reamer point of a knife of single head clamping.

Fig. 5 is the structural representation of the reamer of double end clamping.

Fig. 6 is the B of the present invention section enlarged drawing of Fig. 5.

Fig. 7 is the enlarged drawing of the front cutting edge of existing standard front and back guiding reamer point of a knife of double end clamping.

The specific embodiment

Embodiment 1Shown in Fig. 1-4: before and after the high durability that a kind of single head clamps before the front and back guiding reamer point of a knife of guiding reamer 1 cutting edge 3 be the extended type structure, the cutting edge length m equals 8 times of the front cutting edge length n of front and back guiding reamer point of a knife of existing standard before the point of a knife.The cutting edge length m is increased to m=4mm before the point of a knife, improves point of a knife intensity and strengthens area of dissipation, avoids burning and point of a knife cutting force produces the factor that tipping is scrapped cutter too greatly because of the overheated generation point of a knife of heat in metal cutting, thereby greatly improves cutting wear.

Embodiment 2Shown in Fig. 5-7: before and after the high durability that a kind of double end clamps before the front and back guiding reamer point of a knife of guiding reamer 2 cutting edge 3 be the extended type structure, the cutting edge length m equals 9 times of the front cutting edge length n of front and back guiding reamer point of a knife of existing standard before the point of a knife.The cutting edge length m is increased to m=4.5mm before the point of a knife, improves point of a knife intensity and strengthens area of dissipation, avoids burning and point of a knife cutting force produces the factor that tipping is scrapped cutter too greatly because of the overheated generation point of a knife of heat in metal cutting, thereby greatly improves cutting wear.

Claims

1. the reamer of guiding before and after a kind, comprise the reamer (1) of single head clamping and the reamer (2) that double end clamps, it is characterized in that: cutting edge (3) is the extended type structure before the front and back guiding reamer point of a knife of the reamer (2) that the reamer (1) that described single head clamps and double end clamp, and the cutting edge length m equals 6-10 times of cutting edge length n before the front and back guiding reamer point of a knife of existing standard before the point of a knife.

2. the reamer of described a kind of front and back guiding according to claim 1, it is characterized in that: the cutting edge length m is increased to m=3-5mm before the described point of a knife, improve point of a knife intensity and strengthen area of dissipation, avoid burning and point of a knife cutting force produces the factor that tipping is scrapped cutter too greatly because of the overheated generation point of a knife of heat in metal cutting, thereby greatly improve cutting wear.