CN201483042U

CN201483042U - Lengthening knife bar

Info

Publication number: CN201483042U
Application number: CN200920087497XU
Authority: CN
Inventors: 董志松; 黄晖; 王滨; 李菊香
Original assignee: JIANGSHAN SHIPPING DIESEL FACTORY
Current assignee: Yichang Jiangxia Marine Machinery Co., Ltd.
Priority date: 2009-07-22
Filing date: 2009-07-22
Publication date: 2010-05-26
Anticipated expiration: 2019-07-22

Abstract

A lengthening knife bar comprises a knife handle and a cutter head, wherein the cutter head is provided with a cutter mounting hole and a cutter fastening screw, the knife handle is conical, and the taper of the knife handle adopts Morse No. fiver taper. Through adopting the structure that the cutter head is combined with the knife handle with Morse taper, the lengthening knife bar can realize the fast replacement of the knife head without tool setting when processing on a common machine tool, and can finish the processing only by setting cutter parameters once even on a numerical control machine tool, thereby avoiding the troubles of cutter regulation in advance or tool setting once the cutter is replaced. The lengthening knife bar can process holes which are unable to be processed by a common drill bit, can punch center holes to position, prevents a drill bit from displacing, can increase the rigidity of the cutter, improves the production efficiency, and has good effects for improving the utilization of the cutter and saving the cutter cost.

Description

A kind of spreading knife bar

Technical field

The utility model relates to a kind of machine tool chief axis in the mechanical cold working or drill bushing and step surface, groove of being applicable to and produces the spreading knife bar of the processing in hole on the hole processing interfered or the curved surface.

Background technology

In mechanical cold working, it is that fluted drill directly inserts in Mohs drill bushing tube or the drill chuck and uses that general hole drill is cut technology.But because Mohs sleeve or drill chuck, fried dough twist are drilled with national standard, when the last figure shown type of processing hole owing to produce with part and to interfere and must process by customized nonstandard lengthening drill bit.Because drill bit overhangs oversizely, the drill bit rigidity is bad, and the aperture face is not the plane, and the bit force inequality makes location eccentricity, is easy to cause drill bit to fracture, even breaking of rod head takes place can not get, and part is scrapped.Cause the cutting edge utilization rate low simultaneously, very uneconomical.

Summary of the invention

The technical problem that will solve of the present utility model provides a kind of spreading knife bar, and it can utilize stub drill to match with the spreading knife bar under the prerequisite that ensures crudy, reaches the effect of long drill bit processing; And can overcome because drill bit overhangs oversizely, the drill bit that problem such as the drill bit rigidity is bad causes fractures, even breaking of rod head takes place can not get, and makes part problem such as scrap.

The purpose of this utility model is achieved in that a kind of spreading knife bar, comprises handle of a knife and cutter head, and cutter head is provided with cutter installing hole and cutter trip bolt, and handle of a knife is a pyramidal structure, and the tapering of handle of a knife adopts No. 5 taperings of Mohs.

The spreading knife bar that the utility model provides, the version that adopts cutter head to combine with the handle of a knife with Morse's taper adds on machine tool and can realize man-hour changing cutter head fast and tool setting again; Even Digit Control Machine Tool, only need once set cutter parameters just can finish processing, thereby avoid changing cutter trouble of toolsetting or tool setting in advance, this is very effective to processing group hole or the hole that once do not process, as milling flat, rear center brill location with cotter mill cutter earlier, stub drill draws the hole, worker's processing of the clustered operation of long drill bit reaming; Use this device can process the hole that common drill bit can't directly be processed, promptly can locate by centering, prevent that hole drill is inclined to one side, can increase the cutter rigidity again, enhance productivity, to improving the cutter utilization rate, saving the cost of charp tool also has good effect.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is a structural representation of the present utility model.

The specific embodiment

As shown in Figure 1, the utility model comprises handle of a knife 3 and cutter head 2, and cutter head 3 is provided with cutter installing hole 4 and cutter trip bolt 1, and handle of a knife 3 is a pyramidal structure, and the tapering of handle of a knife 3 adopts No. 5 taperings of Mohs.

The utility model extension bar handle of a knife 3 heads adopt the left hand thread design, and are opposite with the main shaft rotation direction, realized effective locking, and prevent to take place in the cutlery rotary course loosening; Cylindrical and end face are crossed the location can guarantee the cutlery parameter constant.Can realize a kind of handle of a knife, a plurality of quick replacings that different-diameter cutter sword head is housed.

Handle of a knife 3 of the present utility model is a pyramidal structure, and the tapering of handle of a knife 3 adopts No. 5 taperings of Mohs.In all instrument taperings, Morse's taper is the best tapering of self-locking property, and has series of one's own, and utilization extensively in boring machine, drilling machine.Adopt Mohs 5# taper shank, increased the versatility of spreading handle, the big end of 5# awl cylindrical is φ 44.729 in addition, than φ 32 chucks better rigidity is arranged, and also can realize the step transition downwards.

When the utility model uses, cutter, cutter head or drill bit etc. are placed in the cutter installing hole 4, fix by trip bolt 1, trip bolt 1 adopts M8 hexagonal sunk screw, screw head can not exceed the cutter head outer ring, as fastening poor effect, then needs to use the epoxy resin cementation.

Claims

1. a spreading knife bar comprises handle of a knife (3) and cutter head (2), it is characterized in that: cutter head (3) is provided with cutter installing hole (4) and cutter trip bolt (1), and handle of a knife (3) is a pyramidal structure, and the tapering of handle of a knife (3) adopts No. 5 taperings of Mohs.