CN103381555A

CN103381555A - Square tool for machining complicated shaft parts

Info

Publication number: CN103381555A
Application number: CN2013103199614A
Authority: CN
Inventors: 张建华; 赵立华; 付天厚
Original assignee: China Academy of Aerospace Aerodynamics CAAA
Current assignee: China Academy of Aerospace Aerodynamics CAAA
Priority date: 2013-07-26
Filing date: 2013-07-26
Publication date: 2013-11-06
Anticipated expiration: 2033-07-26
Also published as: CN103381555B

Abstract

The invention relates to a square tool for machining complicated shaft parts and belongs to the technical field of wind tunnel experiment balance scale and fulcrum bar machining. The tool is a cuboid with an inner hole at the center, four corners of the cuboid are provided with chamfers, and the shape of the inner hole is matched with parts of shapes of complicated shaft parts to be machined. The tool is square, simple in structure, easy to machine, and capable of enabling the parts to be clamped conveniently during machining and detection and clamped on a machine tool easily through a jaw vice, a pressing plate and the like. Four sides of the tool are parallel and perpendicular to each other, and symmetrical to the axis of each part. Furthermore, the area of each of the four sides is large to be centered, and centering and tool setting precision is high.

Description

A kind of square frock for complicated Machining of Shaft-type Parts

Technical field

The present invention relates to a kind of square frock for complicated Machining of Shaft-type Parts, belong to wind tunnel experiment balance, pole processing technique field.

Background technology

For the complicated axial workpiece such as wind tunnel experiment balance, pole and model body, internal keyway is arranged on endoporus, porose on cylindrical, wedge-shaped slot, groove have strict parallel to each other or vertical relation between each hole or groove, and requirement and cylindrical axis symmetry.Because part is complicated, the multiple working procedures such as part need to mill, line cutting, electric spark just can be completed processing, part process and checkout procedure in clamping, centering very difficult.

Add and generally first use the dividing head clamping on milling machine by miller man-hour, groove and hole that miller can be processed process.Utilize the calibration function clamped one time of dividing head, can guarantee the angular relationship between groove on each cylindrical or hole.But for follow-up line cutting and electric spark operation, dividing head is very heavy, is not suitable as the clamping tool of this two procedures.And the dividing head centre diameter of bore is less, use dividing head clamping axle on the cutting on line lathe, the axial workpiece large for diameter, that length is long, can only clamp a bit of of close end face, because afterbody can not withstand with top, so major part is suspended in the air, not only can affect near the groove of end or the processing in hole, and clamping is not firm.Therefore the line cutting can only be used the instrument clampings such as V shape iron, flat-nose pliers.

These grooves and hole do not machine in same procedure, and every procedure all needs clamping centering, tool setting.The benchmark of the use of each centering is disunity also, groove or hole that line cutting and electric spark operation want the centering miller to process, still due to groove or hole area very little, centering is difficult, and can only a bit of distance of centering during centering, easily produces correct error.Bus pair on can only be with cylindrical when tool setting, tool setting low precision, especially line cutting action need to come tool setting by the intensity of observing discharge spark, are two lines contacts during tool setting, the non-constant of tool setting precision.The final every accumulation of error of part causes the one-piece parts machining accuracy poor.

Summary of the invention

the objective of the invention is in order to propose a kind of square frock for complicated Machining of Shaft-type Parts, overcome in existing complicated Machining of Shaft-type Parts and check, be not easy clamping, the centering difficulty, every procedure benchmark disunity, the shortcomings such as tool setting low precision, this frock, make simple, assembling is simple, be convenient to clamping, clamping is firm, easily dismounting, can make the unifying datum of every procedure, datum level is large, easy centering, calibration is accurate, easily guarantee each groove and hole on part parallel and vertical precision and with the symmetry of axis, on any cylindrical that does not affect part processing that can be contained in axial workpiece.

The objective of the invention is to be achieved through the following technical solutions.

A kind of square frock for complicated Machining of Shaft-type Parts of the present invention, this frock be a center with the cuboid of endoporus, all there is chamfering at place, four angles of cuboid; The shape of this endoporus matches with the part of the profile of complicated axial workpiece to be processed.

Using this frock to add man-hour to complicated axial workpiece to be processed, this frock is being contained on the cylindrical or outer cone of turner and the finished complicated axial workpiece to be processed of miller; Four faces of this frock are parallel or vertical with the baseplane of the groove that miller mills out, and by holding out against screw, stretching screw or welding manner, the cylindrical that has processed or the outer cone of this frock and complicated axial workpiece to be processed fixed;

Frock and the part that assembles can be placed on the four sides of grinding this frock on surface grinding machine, make the four sides of this frock parallel or vertical with the bottom surface of finished groove, four faces of frock are parallel to each other, vertical, and are parallel, symmetrical with the axis of part; Subsequent handling is all processed as benchmark on four sides take this frock, finally in processing with after having inspected, this frock is removed.

Beneficial effect

Frock profile of the present invention is square, and simple in structure, processing and manufacturing is simple, makes part easy to setup in processing and checkout procedure, easily uses the tool holder such as vice, pressing plate on lathe; The frock four sides is parallel to each other, vertical, and is symmetrical with axis of workpiece, and the large easily centering of four sides area, and centering and tool setting precision are high.Every procedure all take the four sides of frock as benchmark centering clamping, tool setting, guarantees the operation unifying datum of every procedure in process.It is firm that frock connects with part, when when holding out against screw and stretching screw and connect, and convenient disassembly, can be contained on the cylindrical of axle or outer cone does not affect arbitrarily the position of part processing.This frock can be reused repeatedly, when with bearing shell frock is connected with part the time, can also by changing the mode of bearing shell, make a frock be used for the axle of different-diameter.

Description of drawings

Fig. 1 is the structural representation of frock;

Fig. 2 is the structural representation of frock;

Fig. 3 is the structural representation of frock;

Fig. 4 is the structural representation of the part that adopts frock shown in Figure 1 and process;

Fig. 5 is the structural representation of the part that adopts frock shown in Figure 2 and process;

Fig. 6 is the structural representation of the part that adopts frock shown in Figure 3 and process;

Fig. 7 is the structural representation of the part that adopts frock shown in Figure 3 and process;

Fig. 8 is the structural representation of bearing shell.

The specific embodiment

The present invention is further described below in conjunction with drawings and Examples.

Embodiment

This frock be a center with the cuboid of endoporus, all there is chamfering at place, four angles of cuboid; The shape of this endoporus matches with the part of the profile of complicated axial workpiece to be processed;

Using this frock to add man-hour to complicated axial workpiece to be processed, this frock is contained on the cylindrical or outer cone of complicated axial workpiece to be processed; Two faces in four faces of this frock are parallel with the baseplane of the groove of complicated axial workpiece to be processed, remaining two faces are vertical with the baseplane of the groove of complicated axial workpiece to be processed, by holding out against screw, stretching screw or welding manner, cylindrical or the outer cone of this frock and complicated axial workpiece to be processed fixed.

As shown in Figure 1, frock 2 is cuboid, and the front of the endoporus of cuboid is taper hole, and the back is through hole, and the diameter of through hole is consistent with the end diameter of taper hole, and all there is chamfering at the place, four angles of cuboid;

As shown in Figure 2, frock 2 is cuboid, and the front of the endoporus of cuboid is taper hole, and the back is through hole, and the diameter of through hole is less than the end diameter of taper hole, and through-hole tail has bevel for welding, and all there is chamfering at the place, four angles of cuboid;

As shown in Figure 3, frock 2 is cuboid, and the endoporus of cuboid is through hole, and all there is chamfering at the place, four angles of cuboid; There is screw-threaded counterbore at one of them chamfering place, and this screw-threaded counterbore passes to the through hole from chamfering;

Show as Fig. 4, part 1 two is all the conical surface, is the left conical surface 5 and the right conical surface 6, and the centre is cylinder 7; The right conical surface 6 endoporus have screw thread; After miller processed the trough 9 of trough 8 on the left conical surface 5 and cylinder 7 centers, dress Fig. 1 showed frock 2 on the right conical surface 6.Frock 2 add man-hour endoporus be processed into consistent with the right conical surface 6 taperings of part 1, with pad 3 and stretching screw 4, that frock 2 and part 1 is fixing.After part 1 machines, unclamp stretching screw 4, can pull down frock 2.

Show as Fig. 5, part 1 two is all the conical surface, is the left conical surface 5 and the right conical surface 6, and the centre is cylinder 7; The right conical surface 6 extends the cylinder 10 that 10mm; After miller processed the trough 9 of trough 8 on the left conical surface 5 and cylinder 7 centers, dress Fig. 2 showed frock 2 on the right conical surface 6.Frock 2 add man-hour endoporus be processed into consistent with the right conical surface 6 taperings of part 1, the groove place of frock 2 right-hand members with extend the cylinder 10 that and weld; After part 1 machines, cylinder 10 is excised, can pull down frock 2.

Show as Fig. 6, part 1 cylindrical is that the face of cylinder, end face have position, the part length that need to process longer, and frock 2 shown in Figure 3 can be above at the position that does not hinder processing near part 1 middle part.Frock 2 endoporus coordinate with part 1 endoporus, and screwing at the place, screw-threaded counterbore hole of frock 2 sides holds out against screw 3, makes frock 2 fixing with part 1.Unclamp after part 1 machines and hold out against screw 3, can pull down frock 2.

As shown in Figure 7, part 1 two diameter is large, and mid diameter is little, if in the middle of frock 2 endoporus and part 1, outside diameter is identical, frock 2 can't go up on part 1, or part 1 self hardness is low, holds out against and easily hurts piece surface with holding out against screw 3.In both cases, the diameter of bore of frock 2 can be processed into greater than part 1 left end top diameter, frock 2 is installed on part 1 than the microcephaly from part 1 left end diameter.Reprocess two bearing shells 4, the cylindrical of bearing shell 4 is consistent with frock 2 endoporus, and bearing shell 4 endoporus are consistent with part 1 cylindrical, and bearing shell 4 is contained in gap between part 1 cylindrical and frock 2 endoporus.Hold out against fixing with part 1 frock 2 and bearing shell 4 with holding out against screw 3 again.So namely facilitate frock 2 to insert parts 1, can avoid again holding out against screw 3 directly and part 1 Surface Contact destruction part 1 surface.And this connection form, the bearing shell 4 that only needs to change different diameter of bores can use on the part of different-diameter, and a frock can repeatedly be used.Unclamp after part 1 machines and hold out against screw 3 and bearing shell 4 and frock 2 are pulled down got final product, the structural representation of frock 2 as shown in Figure 3; The structure of bearing shell 4 as shown in Figure 8.

The form that connects of above four kinds of frocks and part, during upper frock, the bottom surface of the trough that mills with the miller of lever meter centering makes the bottom surface of the trough that frock mills with miller as far as possible parallel, vertical on four sides.The endoporus of frock and part outer outer cone fit clearance can not be too large, and holding out against screw and stretching screw will tighten, and prevent that frock from connecting with part insecure, occur loosening in process.Wherein Fig. 5 and Fig. 6 show the form that connects of frock and part, and be more firm for frock is connected with part, and suitably the several screwed holes of multi-processing on frock, increase the quantity that holds out against screw.Frock four directions size is greater than the part maximum gauge, facilitates the grinder grinding fixture on four sides.After frock was first-class, grinder processes take cylindrical and the miller of axle trough bottom surface was as benchmark, the four sides of grinder dress.Use the inspection of tools such as lever meter, square chest while grinding on platform, the four sides of strict guarantee frock is parallel, vertical with the bottom surface of the finished groove of miller, and four faces of frock are parallel to each other, vertical, and are parallel, symmetrical with the axis of part.Later on each operation all take frock on four sides as benchmark, clamping, centering, tool setting.The connecting mode that has shown as Fig. 4, Fig. 6, Fig. 7 after part is processed and inspected unclamps stretching screw and holds out against screw and can pull down frock.Show connecting mode for Fig. 5, cut away together with the related frock of line cutting and technique clamping and get final product.

Claims

1. square frock that is used for complicated Machining of Shaft-type Parts is characterized in that: this frock be a center with the cuboid of endoporus, all there is chamfering at the place, four angles of cuboid; The shape of this endoporus matches with the part of the profile of complicated axial workpiece to be processed;

2. a kind of square frock for complicated Machining of Shaft-type Parts according to claim 1, it is characterized in that: the front of the endoporus of this frock is taper hole, the back is through hole, and the diameter of through hole is consistent with the end diameter of taper hole, and all there is chamfering at the place, four angles of cuboid.

3. a kind of square frock for complicated Machining of Shaft-type Parts according to claim 1, it is characterized in that: the front of the endoporus of this frock is taper hole, and the back is through hole, and the diameter of through hole is less than the end diameter of taper hole, through-hole tail has bevel for welding, and all there is chamfering at the place, four angles of cuboid.

4. a kind of square frock for complicated Machining of Shaft-type Parts according to claim 1, it is characterized in that: the endoporus of this frock is through hole, all there is chamfering at the place, four angles of cuboid; There is screw-threaded counterbore at one of them chamfering place, and this screw-threaded counterbore passes to the through hole from chamfering.