CN202555884U

CN202555884U - Forming milling cutter suitable for machining of convex step at bottom of deep hole

Info

Publication number: CN202555884U
Application number: CN2012202257079U
Authority: CN
Inventors: 段杰; 夏海军; 全书浩
Original assignee: CHANGDE XIANGYU EQUIPMENT MANUFACTURING Co Ltd
Current assignee: CHANGDE XIANGYU EQUIPMENT MANUFACTURING Co Ltd
Priority date: 2012-05-20
Filing date: 2012-05-20
Publication date: 2012-11-28
Anticipated expiration: 2022-05-20

Abstract

A forming milling cutter suitable for machining of a convex step at the bottom of a deep hole comprises a cutter handle and a cutter body. A recessed opening is arranged on the end portion at the front end of the cutter body, and the depth of the recessed opening is 0.2-0.5mm larger than the height of a boss of a part, so that machining allowance for boss planes of the boss is retained. Two inner cutting edges are retained in the recessed opening, and a back face opening angle of the inner cutting edge is 5-15 degrees. A main cutting edge and an auxiliary cutting edge are on the bottom face of the opening and the edge belt of the cutting body. In use, a straight handle vertical milling cutter is first used for milling a bottom hole, allowance of hole diameter of hole bottom is retained, then the milling cutter is used for milling the convex step at the bottom of the hole, simultaneously the outer cutting edge is used for cutting hole diameter in hinge mode, and finally a flat bottom straight handle key groove milling cutter is used for reaming the top face of the convex step at the bottom of the hole to meet requirements. The milling cutter ensures size requirement, ensures form and location tolerance, enables products to have good consistency, simplifies manufacture process, simultaneously improves production efficiency and saves production cost. The convex step at the bottom of the hole and formed by the cutter is capable of meeting various requirements of the part.

Description

The form cutter of convex step processing at the bottom of a kind of suitable deep hole hole

Technical field

The utility model relates to the cutting tool of mechanical processing industry, the form cutter of convex step processing at the bottom of promptly a kind of suitable deep hole hole.

Background technology

Common straight shank keyway mills is mainly used in closed, the semi-enclosed keyway of milling or other groove, and applicability is poor; The standard form cutter has only concave milling cutter and convex milling cutter, and they are respectively applied for the processing profile is the groove or the crowning of semicircle, does not have the standard form cutter for convex step at the bottom of the hole and can select for use.When the draw ratio in hole was bigger: if with turning processing, because the lathe tool size receives the deep hole limited aperture, lathe tool intensity can not satisfy the turning process requirements; If with brill, ream processing, the convex step can't be shaped at the bottom of the hole.

Summary of the invention

The utility model mainly is a processing difficult problem that solves convex step at the bottom of the big deep hole hole of draw ratio, after improving, a kind of novel form cutter is provided by common straight shank keyway mills.

The form cutter of convex step processing at the bottom of this suitable deep hole hole; Comprise handle of a knife and cutter hub; It is characterized in that: in the front end end of cutter hub is spill type mouth, and the big 0.2～0.5mm of height of the depth ratio part boss of spill type mouth is in order to stay allowance for part boss plane; Two interior cutting edges are arranged in spill type mouth, open relief angle

Figure 2012202257079100002DEST_PATH_IMAGE002

=5～15 ° in the back of interior cutting edge; On the land of the bottom surface of type mouth and cutter hub, main cutting edge and front cutting edge are arranged.

The utility model is in use: mill bottom outlet with straight shank end mill, made allowance at the bottom of aperture, the hole earlier; Use convex step at the bottom of the utility model milling cutter hole milling then, simultaneously outer cutting edge ream aperture; Reach requirement with convex step end face at the bottom of the flat straight shank keyway mills spot-facing at last, promptly removed the burr of convex step at the bottom of the hole, improved the precision and the fineness of convex step end face again.

The utility model has fundamentally solved the processing difficult problem of convex step at the bottom of the deep hole hole, has promptly guaranteed dimensional requirement, has guaranteed form and position tolerance again; Make product have good uniformity, simplified manufacturing process, improved production efficiency simultaneously, saved production cost,, can satisfy each item requirement of part through convex step at the bottom of the moulding hole of this cutter processing.

Description of drawings

Fig. 1 is the part drawing that the utility model is suitable for

Fig. 2 is the embodiment one cutter figure of the utility model

Fig. 3 is the embodiment two cutter figure of the utility model

Among Fig. 1; Need step

,

at the bottom of hole on the processing parts

,

and the hole, require to guarantee dimensional accuracy and form and position tolerance;

Among Fig. 2; The front end end of straight shank keyway mills cutter hub is the spill type mouth of

; Wherein

than

big 0.3mm;

be big 0.3mm than

; Keep original main cutting edge and the front cutting edge of straight shank keyway mills, open relief angle =7 ° in the back of the interior cutting edge of spill type mouth;

Among Fig. 3; The front end end of straight shank keyway mills cutter hub is the spill type mouth of

; Wherein

than

big 0.3mm; Keep original main cutting edge and the front cutting edge of straight shank keyway mills, open relief angle

=15 ° in the back of the interior cutting edge of spill type mouth.

The specific embodiment

Embodiment one:

spill type mouth is opened in straight shank keyway mills cutter hub end; Wherein

, ; Two interior cutting edges are arranged in spill type mouth; For the ease of chip removal and reduce cutting resistance, open relief angle

=7 ° in the back of interior cutting edge.During use: mill bottom outlet, made allowance at the bottom of the hole with the straight shank keyway mills of basic size earlier less than

; Then with becoming

and ream endoporus

like convex step at the bottom of Fig. 2 milling cutter hole milling; The straight shank keyway mills ream convex step end face less than becomes

to use basic size at last.

Embodiment two:

spill type mouth is opened in straight shank keyway mills cutter hub end; Wherein ; Two interior cutting edges are arranged in spill type mouth; For the ease of chip removal and reduce cutting resistance, open relief angle

=15 ° in the back of interior cutting edge.During use: mill bottom outlet, made allowance at the bottom of the hole with the straight shank keyway mills of basic size earlier less than

; Then with becoming

and ream endoporus

like convex step at the bottom of Fig. 3 milling cutter hole milling; The straight shank keyway mills ream convex step end face less than

becomes

to use basic size at last.

Claims

1. the form cutter of convex step processing at the bottom of the suitable deep hole hole; Comprise handle of a knife and cutter hub; It is characterized in that: in the front end end of cutter hub is spill type mouth, and the big 0.2～0.5mm of height of the depth ratio part boss of spill type mouth is in order to stay allowance for part boss plane; Two interior cutting edges are arranged in spill type mouth, open relief angle =5～15 ° in the back of interior cutting edge; On the land of the bottom surface of type mouth and cutter hub, main cutting edge and front cutting edge are arranged.