CN2732394Y

CN2732394Y - Assembly boring cutter for machining stepped hole

Info

Publication number: CN2732394Y
Application number: CN 200420061184
Authority: CN
Inventors: 尹明善; 兰民; 黄承浩
Original assignee: Lifan Industry Group Co Ltd
Current assignee: Lifan Technology Group Co Ltd
Priority date: 2004-09-08
Filing date: 2004-09-08
Publication date: 2005-10-12
Anticipated expiration: 2014-09-08

Abstract

The utility model provides an assembly boring cutter for a machining stepped hole, comprising a cutter rod (1) and a clamping head (8) which is arranged on the tail of the cutter rod (1). The head of the cutter rod (1) is a small hole fine boring section (7), the rear portion of which is a big hole machine-shaping section (5); the small hole fine boring section (7) and the big hole machine-shaping section (5) are totally provided with two cutters and two extruding cutters in the rotating direction; the cutters and the extruding cutters are alternately arranged; the upper edge of the big hole machine-shaping section (5) extends with a blade (3) along the radial direction; the blade (3) is fixed onto the cutter rod (1) through a bolt, and the cutter rod (1) at the back of the big hole machine-shaping section (5) is provided with a chamfering forming cutter (2) which is fixed onto the cutter rod (1) through the bolt (3). The utility model can make the processing of the stepped hole on the complicated parts once finished on one machine tool, and the assembly boring cutter for the machining stepped hole has high machining precision, improved production efficiency, and lowered cost.

Description

A kind of combination boring cutter of processing step hole

Technical field

The utility model relates to a kind of machining tool, especially a kind of combination boring cutter that is used for processing step hole.

Background technology

In machining, the stepped hole that has is not only dark, and the face at place, aperture is plane or the curved surface (as motorcycle engine output shaft installing hole) that certain angle is arranged with the hole axial line.Traditional diamond-making technique is to process each sector hole respectively with single cutting tool, a multitool, and the hole axiality that processes is poor, and the aperture in hole, surface smoothness and axiality also are difficult to be guaranteed.And, when knife is worked into the aperture,, make machining hole lose circle herein because blade at the circumferencial direction unbalance stress, the cutter relieving phenomenon can occur.

The utility model content

The purpose of this utility model provides that a kind of energy is disposable finishes fine finishining, and the combination boring cutter of the processing step hole of circle phenomenon can not appear losing at the place, aperture in the crudy height in hole.

The combination boring cutter of processing step hole described in the utility model, comprise knife bar and the clamping head that is positioned at the knife bar afterbody, head at knife bar is an aperture right boring section, the aperture right boring Duan Houwei macropore section of shaping, the gyratory directions of aperture right boring section is provided with four bites, the gyratory directions of the macropore section of shaping is provided with two bites and two extruding cuttves, and bite and the alternate setting of extruding cutter; Extended radially blade on the macropore section of shaping, blade is by being bolted on the knife bar; Knife bar after the macropore section of shaping is provided with the chamfering forming-tool, and the chamfering forming-tool is by being bolted on the knife bar.

Aperture right boring section in the utility model is used for the blank stepped hole is carried out fine finishining than aperture; The macropore section of shaping goes up circumferential equally distributed two bites and two extruding cutter sections are used for stepped hole is carried out fine finishining than macropore, the surface smoothness that guarantees pore size and hole reaches requirement, having extended radially blade on the macropore section of shaping not only has the cutting function, also finishes the processing of big or small two hole transition position taper holes; The chamfering forming-tool makes the aperture of macropore form chamfering.

The utility model has the advantages that: can make stepped hole on the complex parts on a machine tool once property finish processing, the machining accuracy height has improved production efficiency, has reduced cost.

Description of drawings

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

Fig. 2 is the A-A cutaway view of Fig. 1;

Fig. 3 is the B-B cutaway view of Fig. 1;

Fig. 4 is the C-C cutaway view of Fig. 1.

Fig. 5 is the stepped hole schematic diagram of being processed among the utility model embodiment.

As shown in Figures 1 to 4, the utility model is made up of knife bar 1 and the clamping head 8 that is positioned at knife bar 1 afterbody, head at knife bar 1 is an aperture right boring section 7, aperture right boring section 7 backs are the macropore section of shaping 5, the gyratory directions of aperture right boring section 7 is provided with four bites 10, the gyratory directions of the macropore section of shaping 5 is provided with two bites 10 and two extruding cuttves 11, and bite 10 and the 11 alternate settings of extruding cutter; Extended radially blade 3 on the macropore section of shaping 5, blade 3 is fixed on the knife bar 1 by bolt 9; Knife bar 1 after the macropore section of shaping 5 is provided with chamfering forming-tool 2, and chamfering forming-tool 2 is fixed on the knife bar 1. by bolt 4.

There is a bit of aperture half right boring section 6 in the place ahead of the 1 head aperture right boring section 7 of knife bar shown in Fig. 1, before right boring (extruding) aperture, carries out half right boring earlier, helps to improve crudy, particularly the surface smoothness quality.

With processing motorcycle engine output shaft installing hole is example, have three sector holes, have at interval in the middle of the minimum sector hole 12, it is not vertical with the axial line in hole curved surface that the face at place, aperture, two places is arranged, clamping head 8 is installed on the boring machine, with processed motorcycle engine case lid blank on workbench, start boring machine, the head of knife bar 1 is stretched in the stepped hole of be shaped substantially (cast blank), and the center of minimum aperture 12 in the aligning stepped hole, knife bar 1 slowly moves forward, and aperture half right boring section 6 should be carried out fine finishining (right boring) than aperture 12 by 7 pairs of aperture right boring sections then earlier to carrying out half right boring than aperture 12; Knife bar 1 continues to move forward, and the macropore section of shaping 5 was finished the religion 13 accurately machined whiles of macropore, is finished the processing of transition position taper hole between largest hole 14 and empty 13 and 14 by the blade on it 3; Chamfering forming-tool 2 is used to finish the formation of macropore aperture chamfering.

Claims

1, a kind of combination boring cutter of processing step hole, comprise knife bar (1) and be positioned at the clamping head (8) of knife bar (1) afterbody, it is characterized in that: A, be aperture right boring section (7) at the head of knife bar (1), aperture right boring section (7) back is the macropore section of shaping (5), the gyratory directions of aperture right boring section (7) is provided with four bites (10), the gyratory directions of the macropore section of shaping (5) is provided with two bites (10) and two extruding cuttves (11), and bite (10) and the alternate setting of extruding cutter (11); Extended radially blade (3) on B, the macropore section of shaping (5), blade (3) is fixed on the knife bar (1) by bolt (9); Knife bar (1) after C, the macropore section of shaping (5) is provided with chamfering forming-tool (2), and chamfering forming-tool (2) is fixed on the knife bar (1) by bolt (4).

2, a kind of stepped hole processing combination forming cutter according to claim 1, it is characterized in that: there is a bit of aperture half right boring section (6) in the place ahead of described knife bar (1) head aperture right boring section (7).