CN201613357U - Work fixture - Google Patents

Work fixture Download PDF

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Publication number
CN201613357U
CN201613357U CN2010201054542U CN201020105454U CN201613357U CN 201613357 U CN201613357 U CN 201613357U CN 2010201054542 U CN2010201054542 U CN 2010201054542U CN 201020105454 U CN201020105454 U CN 201020105454U CN 201613357 U CN201613357 U CN 201613357U
Authority
CN
China
Prior art keywords
centre
work fixture
workpiece
processing
sleeve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2010201054542U
Other languages
Chinese (zh)
Inventor
何宝军
王雪峰
张海君
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baiyin Nonferrous Group Co Ltd
Original Assignee
Baiyin Nonferrous Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Baiyin Nonferrous Group Co Ltd filed Critical Baiyin Nonferrous Group Co Ltd
Priority to CN2010201054542U priority Critical patent/CN201613357U/en
Application granted granted Critical
Publication of CN201613357U publication Critical patent/CN201613357U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a work fixture, which resolves uniform problem of processing precision, quality and benefits in the process of processing workpieces such as small shafts and the like. The work fixture comprises a chuck and a centre, a centre sleeve is disposed outside the centre, the end of the centre is provided with a quincunx sleeve, and the tail of the centre is provided a spring and an adjusting nut. The work fixture adopts the elastic quincunx centre and realizes uniform processing precision, quality and benefit in the process of processing workpieces such as small shafts and the like. After the work fixture is used, rejection rate is fast decreased below 3%, working efficiency is increased by 10%, and cost is reduced. Through the structure, the work fixture has high efficiency for fast clamping workpieces. After the work fixture is connected with a lathe chunk or a connecting tray, a dial gauge is used to detect coaxiality of the centre and a lathe spindle, and a spindle to be processed has high coaxiality and other geometric accuracy.

Description

Frock clamp
Technical field
The utility model relates to the processing of little shaft-like workpiece, specifically a kind of frock clamp.
Background technology
Axle is one of part the most frequently used in the various machineries, for the processing of general little shaft-like workpiece, adopts a folder one top or two top clamping processing usually in factory, to guarantee its form accuracy, positional precision and surface roughness requirement.Generally speaking, for the turning processing of axial workpiece, the part that especially back operation will be carried out milling and grinding, people are top-priority to be to select these two kinds of installation way.
Adopt a folder one top clamping turning, the clamping good rigidly, axial location is more accurate, and length of bench is controlled easily; Adopt two top clamping workpieces, precision height but poor rigidity influences the raising of cutting data; When adopting stationary center, good rigidly, centering accurately but are generated heat too much easily with centre bore or top " burning out " because of producing sliding friction with centre bore; Live centre is the sliding friction that top and sliding friction centre bore is made into top internal bearings, can be under very high rotating speed operate as normal, overcome the shortcoming of stationary center, therefore use very extensive.But there is certain assembly accumulation error in live centre, and after the rolling bearing wearing and tearing top generation is beated, thereby reduces machining accuracy.
Little shaft-like workpiece shown in Figure 1, shaft-like workpiece processing quantity is bigger, to having relatively high expectations of axiality, is difficult to guarantee simultaneously the unification of machining accuracy, quality and benefit with method commonly used.Its material is 45 steel, and centre bore is A type (shown in the shape of Fig. 2 centre bore), and requires the shape D of centre bore 1The upper deviation be+0.1mm, lower deviation is-0.1mm, it is Φ 0.012mm that the axis on the face of cylinder of left side Φ 17, h7 must be positioned at the diameter tolerance value, and in the coaxial face of cylinder of datum axis A (axis of the right Φ 17mm), radial dimension Φ 19H7, the Φ 17h7 of axle have all marked the tolerance zone code name, the value of surface roughness requires lower, and the Ra value is respectively 1.6 μ m and 0.8 μ m.Workpiece does not have index requests such as hardness, thereby need not heat treatment.As can be seen from the figure, the dimensional accuracy and the axiality of this workpiece are had relatively high expectations, and need through grinding, and multiple clamping just can be finished.
Standard GB 145-1985 regulation centre bore has four kinds on A type, Type B, C type, R type.The A type, it and top cone match play the centering effect and bear the weight and the cutting force of workpiece, and the workpiece that precision is general adopts the A type.Type B adds 120 ° of taper seats again on the basis of A type, the Type B hole is applicable to required precision height, the more workpiece of operation.The R type is to change 60 ° of conical bores of A type centre bore into arc surface, becomes line with the cooperation of the top conical surface like this and contacts, and can correct a spot of position deviation automatically when axle class clamping.Light-duty and high accuracy axle class adopts R type centre bore.
The utility model content
The purpose of this utility model provides a kind of frock clamp, to solve the reunification of machining accuracy, quality and benefit in the existing little shaft-like workpiece processing.
The utility model comprises chuck and top, toply outer is provided with center sleeve, and top end is provided with plum-blossom sleeve, and top afterbody is equipped with spring and adjusting nut.
The utility model adopts the elastic force plum blossom top, has realized that machining accuracy, quality are unified mutually with benefit in the little shaft-like workpiece processing.After the utility model frock clamp, percent defective is reduced to rapidly below 3%, and work efficiency improves 100% (with respect to former frock clamp and technology), and cost has also obtained reduction.From the structure of these anchor clamps as can be seen, adopt quick-clamping workpiece efficient height.The utility model frock clamp is with after lathe chuck or terminal pad are connected, and check top and axiality lathe spindle with dial gauge, the axle axiality height of its processing, and other geometric accuracies are also high.
Below in conjunction with accompanying drawing the utility model is described in further detail.
Description of drawings
Fig. 1 shows the structural representation of the little shaft-like workpiece that will process;
Fig. 2 is the shape figure in workpiece centre shown in Figure 1 hole;
Fig. 3 is a structural representation of the present utility model.
The specific embodiment
The utility model comprises that chuck 4 and top 7, top 7 is provided with center sleeve 2 outward, and top 7 ends are provided with plum-blossom sleeve 6, and top 7 afterbodys are equipped with spring 3 and adjusting nut 1.Plum-blossom sleeve 6 afterbodys are provided with lock nut 5.
According to the part time job condition, analyze stressing conditions, determine that the needed mechanical property of normal operation is the main foundation of selection.
Plum-blossom sleeve will have sharp peak tooth, so that can penetrate workpiece end face when clamping workpiece, reaches the effect of transmitting enough moment, and therefore the material to plum-blossom sleeve has higher requirements.The material of plum-blossom sleeve must have high hardness and wearability, high elasticity and contact fatigue strength, enough toughness and certain corrosion resistance.To carry out Quenching Treatment to plum-blossom sleeve, guarantee to reach required hardness requirement.
The formulation of technological procedure is directly connected to workpiece quality, labor productivity and economic benefit in the axial workpiece.Part can have several different processing methods, but have only a certain the most reasonable, in formulating the mechanical processing technique rules, must be noted that following some:
1. in the part drawing industrial analysis, need understand specification requirements such as design of part characteristics, precision, material and heat treatment.
2. little shaft-like workpiece machining process route shown in Figure 1 is generally:
Blanking → roughing → semifinishing → milling → half correct grinding → correct grinding
3. thick benchmark is selected: the axle that all surface need be processed, according to the minimum centering of allowance, and select smooth smooth surface.Simultaneously, the thick not reproducible use of benchmark generally can only be used once.
4. smart benchmark is selected:
1) to meet the datum coincidence principle, select design basis or reference for assembling as far as possible as the location benchmark;
2) meet the unifying datum principle, as far as possible in most operations with same location benchmark, make as far as possible the location benchmark overlap with measuring basis;
Selecting the precision height, reliable and stable surface is installed is smart benchmark.Be more or less the same with minimum dimension because of the axle outside diameter is maximum, so blank is selected Φ 20 hot rolled circular steels, and not necessarily will very big axial force during roughing, therefore less demanding to the pre-jacking force of tail centre, as long as can make the cutter flexibility, and clamping workpiece conveniently gets final product rapidly.Therefore to the having relatively high expectations of centre bore, so just should carry out necessary control during work in-process heart hole, the utility model can adopt R type centre bore among the figure, the pressure of tailstock centre in the time of must controlling the first procedure clamping.

Claims (2)

1. a frock clamp comprises chuck and top, it is characterized in that: top (7) are outer to be provided with center sleeve (2), and top (7) end is provided with plum-blossom sleeve (6), and top (7) afterbody is equipped with spring (3) and adjusting nut (1).
2. frock clamp according to claim 1 is characterized in that: plum-blossom sleeve (6) afterbody is provided with lock nut (5).
CN2010201054542U 2010-01-29 2010-01-29 Work fixture Expired - Fee Related CN201613357U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010201054542U CN201613357U (en) 2010-01-29 2010-01-29 Work fixture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010201054542U CN201613357U (en) 2010-01-29 2010-01-29 Work fixture

Publications (1)

Publication Number Publication Date
CN201613357U true CN201613357U (en) 2010-10-27

Family

ID=42999729

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010201054542U Expired - Fee Related CN201613357U (en) 2010-01-29 2010-01-29 Work fixture

Country Status (1)

Country Link
CN (1) CN201613357U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107442789A (en) * 2017-08-04 2017-12-08 安徽科创生产力促进中心有限责任公司 A kind of intelligent double tailstock
CN108637288A (en) * 2018-05-18 2018-10-12 杭州世宝汽车方向机有限公司 Self-centering driving tooling
CN109202105A (en) * 2018-09-19 2019-01-15 广州市镭迪机电制造技术有限公司 A kind of quick top fixture and application method for cutter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107442789A (en) * 2017-08-04 2017-12-08 安徽科创生产力促进中心有限责任公司 A kind of intelligent double tailstock
CN108637288A (en) * 2018-05-18 2018-10-12 杭州世宝汽车方向机有限公司 Self-centering driving tooling
CN109202105A (en) * 2018-09-19 2019-01-15 广州市镭迪机电制造技术有限公司 A kind of quick top fixture and application method for cutter

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20101027

Termination date: 20140129