CN205519900U

CN205519900U - Waist type hole broach

Info

Publication number: CN205519900U
Application number: CN201620243085.0U
Authority: CN
Inventors: 李自友
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-03-28
Filing date: 2016-03-28
Publication date: 2016-08-31
Anticipated expiration: 2026-03-28

Abstract

The utility model discloses a waist type hole broach, it is that a section is similar to the whole member of " waist type ", is handle of a knife, preceding sword and back sword after arriving in proper order in the past. Be equipped with two clamping grooves on the top and bottom of handle of a knife middle part, be equipped with a set of being parallel to each other in the middle part of below the preceding sword and just be alpha's preceding cutting edge with cutter body normal cross section contained angle, be equipped with above handle of a knife and the preceding sword and dodge the groove, do it just do with cutter body normal cross section contained angle to be equipped with a set of being parallel to each other in the middle part of above the back sword alpha's back cutting edge, preceding, back cutting edge height all scales up to final tooth from first tooth in proper order. This broach simple structure, the precision is high, efficient, with low costs during processing waist type hole to but one -step refining shaping.

Description

Waist-shaped hole broaching tool

Technical field

This utility model belongs to machining tool field, is specifically related to a kind of waist-shaped hole broaching tool.

Background technology

At present, the processing mode of waist-shaped hole mainly has two kinds, and a kind of is to add man-hour, Milling Process after commonly used prebored hole for the waist-shaped hole in thickness smaller parts；Another kind is that the waist-shaped hole on part bigger for thickness adds man-hour, linear cutter after commonly used prebored hole.In both processing modes, the former machining accuracy is low, the latter's processing cost high.For high-volume, oversupplied goods, above two processing mode more seems that working (machining) efficiency is low, processing cost is high.

Utility model content

The purpose of this utility model is that the deficiency overcome existing for prior art, proposition one are applicable to waist-shaped hole on high-volume, oversupplied goods and add man-hour, not only machining accuracy height, low cost, and a kind of waist-shaped hole broaching tool that working (machining) efficiency is high.

The technical scheme realizing above-mentioned purpose is: a kind of waist-shaped hole broaching tool, it is the overall rod member that a section is similar to " waist type ", is followed successively by handle of a knife, front cutter and rear cutter from front to back.In the middle part of described handle of a knife, top and bottom are provided with two clamping grooves, described front cutter lower middle part is provided with one group and is parallel to each other and is the front cutting edge of α with cutter hub vertical cross section angle, handle of a knife and front cutter are arranged above with escape groove, and on described rear cutter, Middle face is provided with one group and is parallel to each other and is the rear knife edge of-α with cutter hub vertical cross section angle.

Further, cutter hub width h is equal to waist-shaped hole length H to be processed, and cutter hub both sides arc radius r is equal to waist-shaped hole two ends arc radius R to be processed；The maximum gauge b of cutter hub top and in the rear blade front and rear sections and cutter hub bottom and at the thickness b of described front cutting edge back segment equal to waist-shaped hole two ends arc radius R to be processed；Cutter hub bottom and at the maximum gauge a of described front cutting edge leading portion equal to waist-shaped hole to be processed three prebored holes intersection point m, n or o, vertical dimension A of p to the prebored hole line of centres；The height c of described front cutting edge and described rear knife edge, is all incremented to b from a from first blade c1 to last blade cn successively.

Further, described escape groove degree of depth d is equal to the radius R of waist-shaped hole more than the radius R1-A, the radius R1 of prebored hole of prebored hole；Escape groove width e is not less than the distance between three prebored hole intersection point m and n.

Effect of the present utility model is: during a kind of waist-shaped hole broaching tool batch machining waist-shaped hole manufactured according to such scheme, precision is high, efficiency high, low cost, and can be processed and formed at one time.

Accompanying drawing explanation

Fig. 1 is the structural representation of one embodiment of this utility model.

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

Fig. 3 is the profile at Figure 1A-A place.

Fig. 4 is the profile at Figure 1B-B place.

Fig. 5 is the profile at Fig. 1 C-C.

Fig. 6 is the preboring hole pattern of waist-shaped hole to be processed, and the prebored hole of its waist-shaped hole to be processed is three.

Fig. 7 is first front cutting edge of front cutter profile when starting to cut in prebored hole.

Fig. 8 is the profile at the end of last front cutting edge of front cutter cuts in prebored hole.

Fig. 9 is first rear knife edge of rear cutter profile when starting to cut in prebored hole.

Figure 10 is the profile at the end of last rear knife edge of rear cutter cuts in prebored hole.

Figure 11 is waist-shaped hole figure to be processed.

In figure: 1. handle of a knife, 101. clamping grooves, 2. before cutter, 201. front cutting edges, 1201. escape groove, 3. after cutter, 301. rear knife edges.

Detailed description of the invention

The utility model is described in further detail below in conjunction with the accompanying drawings.

As shown in Fig. 1～Fig. 5 and Fig. 7～Figure 10, this utility model one waist-shaped hole broaching tool is the overall rod member that a section is similar to " waist type ", is followed successively by handle of a knife 1, front cutter 2 and rear cutter 3 from front to back.In the middle part of described handle of a knife 1, top and bottom are provided with two clamping grooves 101, are connected with broaching machine when being used for broaching.Described front cutter 2 lower middle part be provided with one group be parallel to each other and with the front cutting edge 201 that cutter hub vertical cross section angle is α, to cut the surplus to be processed below prebored hole.Handle of a knife 1 and front cutter 2 are arranged above with escape groove 1201, in order to before rear cutter 3 starts processing, handle of a knife 1 and front cutter 2 pass through from prebored hole.On described rear cutter 3 Middle face be provided with one group be parallel to each other and with the rear knife edge 301 that cutter hub vertical cross section angle is-α, to cut the surplus to be processed above prebored hole.

As shown in Fig. 1～Fig. 6 and Figure 11, cutter hub width h is equal to waist-shaped hole length H to be processed, and cutter hub both sides arc radius r is equal to waist-shaped hole two ends arc radius R to be processed；The maximum gauge b of cutter hub top and in the rear blade 301 front and rear sections and cutter hub bottom and at the thickness b of described front cutting edge 201 back segment equal to waist-shaped hole two ends arc radius R to be processed；Cutter hub bottom and at the maximum gauge a of described front cutting edge 201 leading portion equal to waist-shaped hole to be processed three prebored holes intersection point m, n or o, vertical dimension A of p to the prebored hole line of centres；Described front cutting edge 201 and the height c of described rear knife edge 301, be all incremented to b from a from first blade c1 to last blade cn, it is ensured that the cutting output of each blade is within tolerance band successively.

As shown in Fig. 3, Fig. 4 and Fig. 6, degree of depth d of described escape groove 1201 is equal to the radius R of waist-shaped hole more than the radius R1-A, the radius R1 of prebored hole of prebored hole；The width e of escape groove 1201 is not less than the distance between three prebored hole intersection point m and n, in order to before rear cutter 3 starts processing, handle of a knife 1 and front cutter 2 pass through from prebored hole.

As shown in Fig. 6 and Figure 11, before wire pulling method waist-shaped hole, should hole in advance, three prebored hole diameter is identical, pitch-row is equal, be centrally located at same straight line, and length H1 of prebored hole and radius R1 and length H of waist-shaped hole to be processed and radius R are the most equal.According to the length of waist-shaped hole, prebored hole can be three, it is also possible to is two or more, and when prebored hole is two, in Fig. 6, intersection point n, o overlap respectively at m, p；When prebored hole is multiple, in Fig. 6, intersection point n, m and o, p are respectively the most outermost two intersection points.

As shown in Fig. 6～Figure 10, add man-hour, first by handle of a knife 1 through prebored hole, by clamping groove 101, broaching tool is connected with broaching machine again, then starts broaching, until first blade c1 and prebored hole intersection point o of front cutting edge 201, p-contact (such as Fig. 6, Fig. 7), wire pulling method starts below, when broaching tool moves on until last blade cn of front cutting edge 201 is by after prebored hole, and cutting below terminates, machine-shaping below waist-shaped hole (such as Fig. 8).(such as Fig. 6, Fig. 9) is contacted with prebored hole intersection point m, n when broaching tool is further continued for advancing to first blade c1 of rear knife edge 301, wire pulling method starts above, when broaching tool be further continued for advancing up to last blade cn of rear knife edge 301 by prebored hole after, cutting above terminates, the above machine-shaping (such as Figure 10) of waist-shaped hole, so far, waist-shaped hole process finishing.

Claims

1. a waist-shaped hole broaching tool, it it is a section overall rod member that is similar to " waist type ", it is followed successively by handle of a knife, front cutter and rear cutter from front to back, it is characterized in that: in the middle part of described handle of a knife, top and bottom are provided with two clamping grooves, described front cutter lower middle part is provided with one group and is parallel to each other and is the front cutting edge of α with cutter hub vertical cross section angle, handle of a knife and front cutter are arranged above with escape groove, and on described rear cutter, Middle face is provided with one group and is parallel to each other and is the rear knife edge of-α with cutter hub vertical cross section angle.

2. according to the waist-shaped hole broaching tool described in claim 1, it is characterised in that: cutter hub width h is equal to waist-shaped hole length H to be processed, and cutter hub both sides arc radius r is equal to waist-shaped hole two ends arc radius R to be processed；The maximum gauge b of cutter hub top and in the rear blade front and rear sections and cutter hub bottom and at the thickness b of described front cutting edge back segment equal to waist-shaped hole two ends arc radius R to be processed；Cutter hub bottom and at the maximum gauge a of described front cutting edge leading portion equal to waist-shaped hole to be processed three prebored holes intersection point m, n or o, vertical dimension A of p to the prebored hole line of centres；The height c of described front cutting edge and described rear knife edge, is all incremented to b from a from first blade c1 to last blade cn successively.

3. according to the waist-shaped hole broaching tool described in claim 1, it is characterized in that: described escape groove degree of depth d deducts three prebored holes intersection point m, n or o, vertical dimension A of p to the prebored hole line of centres more than the radius R1 of prebored hole, the radius R1 of prebored hole is equal to the radius R of waist-shaped hole；Escape groove width e is not less than the distance between three prebored hole intersection point m and n.