CN209452900U - A kind of reusable carbide broach - Google Patents

Abstract

The utility model discloses a kind of reusable carbide broach, including knife bar, hard alloy broach shell, replaceability hard alloy broach shell, transition sleeve, cross key, adjusting sleeve, clamping sleeve and lock sleeve, hard alloy broach shell and transition sleeve are sheathed on knife bar, and hard alloy broach shell and transition sleeve are positioned and are clamped on knife bar by cross key, adjusting sleeve, clamping sleeve and lock sleeve, the refill-unit of transition sleeve when replaceability hard alloy broach shell is the excessive wear of hard alloy broach shell.The utility model can effectively promote the whole service life of broaching tool, reduce cemented carbide material and consume, and further reduced production cost.

Description

A kind of reusable carbide broach

Technical field

The utility model relates to arrive broaching cutters technical field, specifically a kind of reusable hard alloy is drawn Knife.

Background technique

Automobile ride comfort and handling high request in recent years determine the high request for being coupled transmission to automobile, especially It is higher and higher for the accuracy requirement for being coupled cooperation between each driving member, and the design accuracy of related components also accordingly mentions Height, usually at 7 grades or more, the required precision of spline class is also promoted from original 6~7 grades to 4~5 critical size tolerance Grade.Because there is certain deformation after broaching through Overheating Treatment, thus be unable to satisfy required precision, more in some internal spline class parts Carried out technological innovation come more producers, i.e., it is hot before soft drawn when broaching size use hard alloy after heat there are a certain amount Broaching tool carries out high speed broaching finish trimming to workpiece.Fig. 1 show a kind of existing common carbide broach, including knife bar 1, hard The components such as matter alloy broach shell 2, cross key 3, adjusting sleeve 4, clamping sleeve 5, lock sleeve 6.Since part hardness generally exists after quenching 60HRC or more, quickly, broaching certain amount just needs to sharpen later for the application of hard alloy broach shell 2 abrasion.In addition, hard alloy is drawn Cutting is with wide Contoured squeeze formula Broaching Technology, and to reduce cutting force, it is generally all relatively narrow that cutter tooth designs land, so sharpening anterior angle 4 After~5 times, as land disappears, calibration teeth size is strongly reduced because of the presence of relief angle, finally because of part ruler after broaching It is very little to occur overproof and scrap, new hard alloy broach shell 2 must be re-replaced at this time.Due to 2 required precision of hard alloy broach shell Height, manufacturing process is complicated, expensive, and high production cost and the waste of rare cemented carbide material obviously have become heat The big technological difficulties of the one of back dead lift technique.

Summary of the invention

The technical problem to be solved by the utility model is to propose that one kind can promote broaching tool whole service life, reduce hard Matter alloy material consumes, and the reusable carbide broach of production cost is effectively reduced,

In order to solve the above technical problems, a kind of reusable carbide broach of the utility model include knife bar, it is hard Matter alloy broach shell, replaceability hard alloy broach shell, transition sleeve, cross key, adjusting sleeve, clamping sleeve and lock sleeve, the hard close Golden broach shell and transition sleeve are sheathed on the knife bar, and will be described hard by the cross key, adjusting sleeve, clamping sleeve and lock sleeve Matter alloy broach shell and transition sleeve are positioned and are clamped on the knife bar；The replaceability hard alloy broach shell is the hard alloy The refill-unit of transition sleeve when broach shell excessive wear.

A kind of above-mentioned reusable carbide broach, the length of the transition sleeve and the hard alloy broach shell Length is identical.

A kind of above-mentioned reusable carbide broach, the hard alloy broach shell and the replaceability hard alloy The structure snd size of broach shell are identical.

The utility model by adopting the above-described technical solution, it by the innovative design to broaching tool structure, because repeatedly The carbide cutter tool set that size reduces and scraps after sharpening carries out repeating recycling.Although being added to broaching tool knife bar length It is long, but the finite length of a hard alloy broach shell is only lengthened, it is usually no more than 250mm, the hard draw of opposite 50m/min or more Speed only increases by 0.3 second time, influences for hard draw cuts 50 seconds beat frequencys of a part little, can pass through completely Other aspect local directed complete sets of process system are made up.The utility model is realized to scrapping hard alloy under regular situation The repetition of broach shell recycles, and by the effective decomposition undertaken to cutting output, slows down the abrasion of new broach shell, extends the service life of old broach shell Period reduces the consumption of cemented carbide material, efficiently solves production cost to greatly promote broaching tool whole service life High technical problem generates positive influence to hot back dead lift Broaching Technology.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of existing common carbide broach；

Fig. 2 is structural schematic diagram of the utility model carbide broach under new knife-like state；

Fig. 3 is structural schematic diagram of the utility model carbide broach under double-pole set state.

Specific embodiment

There are two types of use states for the reusable carbide broach of the utility model, as shown in Figures 2 and 3 respectively.

As shown in Fig. 2, the reusable carbide broach of the utility model for the first time use (new knife-like state) when Structure includes knife bar 1, hard alloy broach shell 21, transition sleeve 7, cross key 3, adjusting sleeve 4, clamping sleeve 5 and lock sleeve 6.It is relatively existing There is common carbide broach, the utility model lengthens the length of knife bar 1, and hard alloy broach shell 21 and transition sleeve 7 are pacified On knife bar 1, is positioned and clamped by cross key 3, adjusting sleeve 4, clamping sleeve 5 and lock sleeve 6.The length of transition sleeve 7 with 21 length of hard alloy broach shell is identical, after being mounted on hard alloy sleeve 21.At this point, participating in the only carbide cutter tool of cutwork Set 21.After a period of time to be used, hard alloy broach shell 21 is inevitably generated abrasion, and leads to school after repeatedly sharpening Quasi- tooth, which becomes smaller, to be continued to use, and part size occurs overproof after broaching.At this moment it is hard transition sleeve 7 can be changed to new replaceability Matter alloy broach shell 22(is as shown in Figure 3), replaceability hard alloy broach shell 22 is identical as the structure snd size of hard alloy broach shell 21. In this way, the utility model carbide broach enters double-pole set state, worn-out hard alloy broach shell 21 is still mounted in knife bar 1 Forward position, workpiece first passes through the hard alloy broach shell 21 for having applied abrasion when broaching, get rid of most of chipping allowance, then By the new broaching of replaceability hard alloy broach shell 22 to finished size, in this state, worn-out hard alloy broach shell Though 21 assume responsibility for most cutting output, it is not the guarantor of final size, thus can reconditioning number be multiplied, Service life substantially extends.Replaceability hard alloy broach shell 22 only assumes responsibility for being equivalent to a small amount of cutting of the part tolerance with size simultaneously Based on amendment, to substantially reduce cutting abrasion, the reconditioning frequency, extending life period, to greatly improve broaching tool are reduced Whole service life reduces the consumption of cemented carbide material, has and solves the high technical problem of production cost.Replaceability Hard alloy broach shell 22 is also the replacer of hard alloy broach shell 21 simultaneously, once the application of hard alloy broach shell 21 is thoroughly scrapped, Then replaceability hard alloy broach shell 22 moves forward, while back segment is further added by new hard alloy broach shell, realizes and closes to replaceability hard The reuse of golden broach shell 22, so that production cost be greatly reduced while promoting broaching tool service life.

Claims (3)

1. a kind of reusable carbide broach, which is characterized in that it includes knife bar, hard alloy broach shell, replaceability Hard alloy broach shell, transition sleeve, cross key, adjusting sleeve, clamping sleeve and lock sleeve, the hard alloy broach shell and transition sleeve are arranged In on the knife bar, and by the cross key, adjusting sleeve, clamping sleeve and lock sleeve by the hard alloy broach shell and transition sleeve It positions and is clamped on the knife bar；Described in when the replaceability hard alloy broach shell is the hard alloy broach shell excessive wear The refill-unit of transition sleeve.

2. a kind of reusable carbide broach as described in claim 1, which is characterized in that the length of the transition sleeve It spends identical as the length of the hard alloy broach shell.

3. a kind of reusable carbide broach as claimed in claim 1 or 2, which is characterized in that the hard closes Golden broach shell is identical as the structure snd size of the replaceability hard alloy broach shell.