CN201132229Y

CN201132229Y - Simple high precision positioning mandrel

Info

Publication number: CN201132229Y
Application number: CNU2007200995161U
Authority: CN
Inventors: 周兆文; 孙艳辉; 崔爱红
Original assignee: TIANJIN UNIV YINTAI TECH Co Ltd TIANJIN CITY
Current assignee: TIANJIN UNIV YINTAI TECH Co Ltd TIANJIN CITY
Priority date: 2007-12-28
Filing date: 2007-12-28
Publication date: 2008-10-15
Anticipated expiration: 2017-12-28

Abstract

The utility model discloses a simple clamp which can process high-precision parts, and a simple high-precision positioning mandrel is composed of a mandrel body and a nose cone. A section of positioning circular shaft is processed on the mandrel body, and an expansion hatch is arranged along a shaft of the positioning circular shaft. A conical tube thread inner hole is processed in the mandrel body, and the nose cone screws in the conical tube thread inner hole. As the nose cone is screwed in the conical tube thread inner hole, the top circle of the positioning circular shaft swells until a work piece is clamped, and under the one time positioning clamping state of the work piece, the process of inner holes and end faces can be finished. The simple clamp has the beneficial effect that a simplest structure is adopted to solve the processing problem of the parts when both end faces are needed to have higher verticality precision and roughness concentration precision. The simple clamp saves the process of transverse alignment of a machine tool clamp and effectively improves the machining efficiency on the premise of ensuring the corresponding precision of the clamp and the machine tool.

Description

The simple high-precision positioning core axle

Technical field

The utility model belongs to the machining technological equipment, is specifically related to a kind of simple and easy anchor clamps that can the machining high-precision part.

Background technology

Well-known in machining process when processed parts (is example with the lathe) are finished various processing after, the left side can be downcut with cutting knife, this is passable under the not too high situation of its flatness of a side that is cut off face or fineness requirement.Yet when two end faces all had higher perpendicularity precision and roughness required precision, its processing can not once be finished, and parts must be downcut the back upset and reload chuck for 180 °, again the section of being cut was carried out secondary operations.The problem of bringing thus is: two originally parallel cross sections (because two sections are once to process on lathe) is difficult to guarantee that owing to reloading chuck two cross sections are vertical with the axial line of lathe, and this is the ubiquitous problem of machined.Solving the method that this type of problem generally adopts is (as Fig. 1): 1) at first machined surface A and D1 hole; 2) with A face and location, D1 hole, compress the B face, processing D2 hole; 3), compress C face processing B face with A face and location, D1 hole.So not only need three road manufacturing procedures, also need the comparatively complicated anchor clamps of two covers, increased machining period expense and anchor clamps manufacturing expense.For overcoming present endoporus location, the utility model proposes a kind of comparatively desirable high accuracy, the positioning core axle that convenience is made, cost is low with the shortcoming that anchor clamps exist.

Summary of the invention

The purpose of this utility model provides a kind of hi-Fix mandrel, thereby makes positioning core axle have characteristics simple in structure, that positioning accuracy is high.

Structure of the present utility model as shown in Figure 2.The simple high-precision positioning core axle is made up of mandrel body 1 and cone blocking 4 as jig.One section location of processing circular shaft 2 on mandrel body 1 axially has an expansion hatch 5 along location circular shaft 2.The inside of mandrel body 1 is processed with taper pipe thread endoporus 3, and cone blocking 4 screws in the afterbody distending that taper pipe thread endoporus 3 can make location circular shaft 2.Location circular shaft 2 can be used as the location of part to be processed endoporus, by the datum level of the interface of locating circular shaft 2 and mandrel body 1 as the part to be processed end face.As shown in Figure 3, part to be processed is processing A face and D1 hole earlier, then work piece is installed on the location circular shaft 2 of mandrel body 1, screw cone blocking 4, because cone blocking 4 pitch diameters of thread have the forward tapering, along with the screw-in of cone blocking 4, the cylindrical of location circular shaft 2 swells, until work piece is clamped.The realization work piece is once finished the processing of D2 hole and B face under the one-time positioning clamped condition, not only reduced manufacturing procedure, and guaranteed the crudy of work piece.

Description of drawings

Fig. 1 is traditional part to be processed figure;

Fig. 2 is the utility model structure chart;

Fig. 3 is the utility model processing parts schematic diagram.

The specific embodiment

Below by specific embodiment the utility model is further described.Work piece as shown in Figure 1, the D1 bore dia is of a size of φ 25+0.02mm, and the D2 hole is φ 0.035mm to D1 hole axiality tolerance, and A is 0.01mm in the face of D1 hole perpendicularity tolerance, and B is 0.03mm in the face of D1 hole perpendicularity tolerance.

The cone blocking 4 that the utility model adopted is the common taper pipe thread cone blocking of ZG3/8, and the taper pipe thread endoporus in the mandrel body 1 is the common taper pipe thread of ZG3/8.As shown in Figure 3, manufacturing of the present utility model at first is that the location circular shaft 2 of mandrel body 1 must be done roughing earlier, and the cylindrical d1 of its locating shaft is machined to φ 25.5, leaves allowance for finish, taper pipe thread endoporus 3 is processed as the common taper pipe thread of ZG3/8, processes expansion hatch 5 then.

When the utility model used as anchor clamps, mandrel body 1 was positioned on the lathe, and the cylindrical d1 of location circular shaft 2 is with after being machined into φ 24.97-24.99mm, and mandrel can use.Part to be processed is processing A face and D1 hole earlier, then work piece is installed on the cylindrical d1 of location circular shaft.Cone blocking 4 is provided with interior hexagonal, screws cone blocking.Because the footpath all has 1: 16 forward tapering in the taper pipe thread 3 of mandrel body 1 and the cone blocking 4, screw-in along with cone blocking 4, the cylindrical of location circular shaft swells, until work piece is clamped, at this moment under the one-time positioning clamped condition of work piece, can once finish the processing of D2 hole and B face, not only reduce manufacturing procedure, and guarantee the crudy of work piece.

The beneficial effects of the utility model are: adopt the simplest structure to solve the part processing problem that " when two end faces all have higher perpendicularity precision and roughness precision " requires.Save the process of jig " centering ", under the prerequisite of the relative accuracy that guarantees anchor clamps and lathe, effectively improved machined efficient.

Claims

1. simple high-precision positioning core axle, form by mandrel body (1) and cone blocking (4), it is characterized in that going up one section location of processing circular shaft (2) at mandrel body (1), axially have an expansion hatch (5) along location circular shaft (2), the inside of mandrel body (1) is processed with taper pipe thread endoporus (3), and described cone blocking (4) screws in the afterbody distending that taper pipe thread endoporus (3) can make location circular shaft (2).