CN204621171U

CN204621171U - A kind of back taper tapering forming cutter

Info

Publication number: CN204621171U
Application number: CN201520334245.8U
Authority: CN
Inventors: 李振丰; 奚旭东; 张明敏
Original assignee: D & M (suzhou) Precision Cutting Tools Co Ltd
Current assignee: D&m Suzhou Precision Cutting Tools Co ltd
Priority date: 2015-05-22
Filing date: 2015-05-22
Publication date: 2015-09-09
Anticipated expiration: 2025-05-22

Abstract

The utility model relates to a taper forming knife for reverse taper, which comprises a drill shank and a drill edge arranged at one end of the drill shank. The outer surface of the drill edge is provided with at least three helical grooves to form at least three helical side edges, each The radius of the helical side edge tapers from the end of the drill edge toward the drill shank. The taper forming cutter for reverse taper of the utility model forms a spiral groove and a spiral side edge on the drill edge, and makes the drill edge conical, so that the centering is stable, the cutting resistance is greatly reduced, and the chip removal space is increased at the same time. , Chip removal is smooth, improving the stability of cutting.

Description

A kind of back taper tapering forming cutter

Technical field

The utility model relates to a kind of cutter of back taper, particularly relates to a kind of tapering forming cutter processing back taper.

Background technology

In machining industry, need to carry out back taper to the hole processed, to meet instructions for use.The processing of existing back taper uses roll forming method, gear shaping method and the squeezing that rises usually, and wherein, roll forming method working (machining) efficiency is high but precision is low, poor for applicability; The flexibility of gear shaping method is high but efficiency is lower, the general part only can not processed for roll forming method; The squeezing efficiency that rises and precision all very high, but cutter is costly, and fixture is complicated.

The shaping back taper of which kind of method above-mentioned that don't work, in operation, cutting resistance is large, centering is unstable, causes cutting instability, decreases the service life of forming cutter for the forming cutter of back taper.

Utility model content

For solving the problems of the technologies described above, the purpose of this utility model is to provide the back taper tapering forming cutter that a kind of cutting resistance is little, centering surely makes cutting stable.

Back taper tapering forming cutter of the present utility model, comprise drillstock and the drill lip being arranged at described drillstock one end, the outer surface of described drill lip arranges at least three spiral grooves to form at least three spiral side edges, each described spiral side edge partly without leave the end of described drill lip towards described drillstock direction convergent.

Further, the end of described drill lip is a plane.

Further, each described spiral side edge is all provided with seamed edge along its hand of spiral.

Further, the outer surface of described drill lip arranges four described spiral grooves to form four described spiral side edges.

Further, the outer peripheral face of described drillstock is arranged with groove.

Further, described drill lip is made up of carbide alloy.

By such scheme, back taper tapering forming cutter of the present utility model by forming spiral grooves and spiral side edge on drill lip, and makes drill lip be taper, centering is steady, substantially reduces cutting resistance, increases chip space simultaneously, chip removal is smooth and easy, improves the stability of cutting.

Above-mentioned explanation is only the general introduction of technical solutions of the utility model, in order to better understand technological means of the present utility model, and can be implemented according to the content of description, coordinates accompanying drawing to be described in detail as follows below with preferred embodiment of the present utility model.

Accompanying drawing explanation

Fig. 1 is structural front view of the present utility model;

Fig. 2 is structure side view of the present utility model.

Detailed description of the invention

Below in conjunction with drawings and Examples, detailed description of the invention of the present utility model is described in further detail.Following examples for illustration of the utility model, but are not used for limiting scope of the present utility model.

See Fig. 1 and Fig. 2, a kind of back taper tapering forming cutter described in the utility model one preferred embodiment, comprise drillstock 10 and the drill lip 20 being arranged at drillstock 10 one end, the outer surface of drill lip 20 arranges at least three spiral grooves 21 to form at least three spiral side edges 22, each spiral side edge 22 partly the end of drill lip 20 is towards drillstock 10 direction convergent without leave, namely drill lip 20 is cone-shaped.The radius of spiral side edge 22 is the beeline of distal-most edge to drillstock 10 rotation of spiral side edge 22.Preferably, the utility model arranges four spiral grooves 21 to form four spiral side edges 22 at the outer surface of drill lip 20.Increase chip space by arranging four spiral grooves 21, chip removal is smooth and easy, improves the stability of cutting; Utilize four spiral grooves 21 to form four spiral side edges 22, centering is steady, and cut brisk, chip breaking is light; Make drill lip 20 form cone-shaped, reduce cutting resistance.

Concrete, the end of drill lip 20 of the present utility model is a plane, specifically as shown in Figure 2, can anti-tipping blade, resistance to wear.

Further, each spiral side edge 22 is equipped with seamed edge 23 along its hand of spiral, stability and the wearability of drill lip 20 can be improved.

The outer peripheral face of the drillstock 10 in the utility model is arranged with groove 11, is convenient to drillstock 10 to be installed on fixture or lathe process workpiece.

Drill lip 20 in the utility model is made up of carbide alloy, and drill lip 20 possesses higher rigidity.

The beneficial effect of back taper tapering forming cutter of the present utility model is as follows:

1, by forming spiral grooves and spiral side edge on drill lip, and make drill lip be taper, centering is steady, and substantially reduce cutting resistance, increase chip space simultaneously, chip removal is smooth and easy, improves the stability of cutting;

2, the end of drill lip is set to plane, can tipping be avoided, resistance to wear;

3, seamed edge is set on spiral side edge, further increases stability and the wearability of drill lip.

The above is only preferred embodiment of the present utility model; be not limited to the utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model know-why; can also make some improvement and modification, these improve and modification also should be considered as protection domain of the present utility model.

Claims

1. A taper forming knife for reverse taper, characterized in that: it comprises a drill shank and a drill edge arranged at one end of the drill shank, the outer surface of the drill edge is provided with at least three helical grooves to form at least three helical side edges , the radius of each of the helical side cutting edges is gradually reduced from the end of the drill blade toward the direction of the drill shank.

2. The taper shaping tool for reverse taper according to claim 1, characterized in that: the end of the drill edge is a plane.

3. The taper forming knife for reverse taper according to claim 2, characterized in that: each of the helical side blades is provided with an edge along its helical direction.

4 . The taper shaping tool for reverse taper according to claim 3 , wherein four spiral grooves are arranged on the outer surface of the drill blade to form four spiral side edges. 4 .

5 . The taper forming tool for reverse taper according to claim 4 , characterized in that: the outer peripheral surface of the drill shank is concavely provided with grooves. 6 .

6. The taper forming tool for reverse taper according to claim 5, characterized in that: the drill edge is made of cemented carbide.