CN201579698U

CN201579698U - Grinding jig ensuring high accuracy and coaxiality

Info

Publication number: CN201579698U
Application number: CN2009203116165U
Authority: CN
Inventors: 逄增芬; 唐江; 曾恒德
Original assignee: AVIC Liyuan Hydraulic Co Ltd
Current assignee: AVIC Liyuan Hydraulic Co Ltd
Priority date: 2009-09-27
Filing date: 2009-09-27
Publication date: 2010-09-15
Anticipated expiration: 2019-09-27

Abstract

The utility model discloses a grinding jig ensuring high accuracy and coaxiality. The grinding jig ensuring high accuracy and coaxiality comprises a jig body (2) shaped like a round tube, wherein the jig body (2) is internally provided with a locating platform (3), the surface of the locating platform (3) and the axial line of the jig body (2) are arranged obliquely, and the inclined angle is consistent with the included angle alpha between the T surface of a part to be processed and a C-shaped hole on the part; the side surface of the locating platform (3) is provided with a directional block (4), the side surface of which is correspondingly matched with a locating benchmark R-shaped arc of the part; the jig body (2) is further internally provided with a fixing component (5); and the locating platform (3) and the part (1) are connected and fixed by the fixing component (5), thus realizing the fixing and clamping of the part (1). The grinding jig has simple but compact structure, smart locating, easy manufacture, convenient operation, reliable clamping, high processing accuracy, low cost, and good balance in adjusting and rotating, meets processing requirements, guarantees processing quality, ensures the production needs, and improves the production efficiency.

Description

Guarantee the grinding jig of high accuracy axiality

Technical field

The utility model relates to a kind of frock clamp, particularly a kind of grinding jig that guarantees the high accuracy axiality.

Background technology

In the mechanical processing process, adopt anchor clamps that workpiece is installed usually, determining the relative position of workpiece and cutting tool, and workpiece is clamped reliably.A complex-shaped part is arranged on plunger type variable capacity pump, its existing frock clamp is made up of floral disc and angle bar, floral disc is used for anchor clamps are installed in lathe, angle bar is provided with positioner, positioner is made of index dial and index pin, and index dial is provided with two holes and index pin that cooperates with anchor clamps that is 180 ° of distributions; After processing a hole and end face, unclamp pressing plate index pin extracted from the hole of anchor clamps, with part with the movable part of anchor clamps around 180 ° of axle revolutions, again index pin is inserted in another hole of anchor clamps, behind pressing plate clamping index dial, reprocess another hole and end face.Existing clamp structure complexity is difficult for making.It is more to influence the anchor clamps factors of accuracy, causes the anchor clamps accumulated error big, is difficult to guarantee the processing request of part axiality; Need locking during operation between index dial and the clamp body, troublesome poeration is wasted time and energy; The clamp structure balance is poor, and anchor clamps stability when rotating at a high speed is bad.

The utility model content

The purpose of this utility model is, a kind of grinding jig that guarantees the high accuracy axiality is provided.It is simple in structure, and accumulated error is little, the part coaxial accuracy height that processes.And have easy manufacturing, balance is good, convenience operation can be enhanced productivity.

The technical solution of the utility model: a kind of grinding jig that guarantees the high accuracy axiality, be used for part when grinding accurate location and fix to clamp, constitute and to comprise clamp body; This grinding jig is by positioning table is set in clamp body, to realize the T face location of part; By directed piece being set, to realize the location, side of part in the positioning table side; By fixation kit is set in clamp body, to realize fixing to clamp of part.

In the grinding jig of above-mentioned assurance high accuracy axiality, by on the tube wall of positioning table, offering breach, so that the fixing and positioning action of part.

In the grinding jig of aforesaid assurance high accuracy axiality, offer balance pipe by side, with the balance clamp body at positioning table.

In the grinding jig of aforesaid assurance high accuracy axiality, constitute the clamp body comprise tubular, be provided with positioning table in the clamp body, the axis of positioning table table top and clamp body is obliquely installed, and the angle α in C hole is consistent on angle of inclination and part to be processed T face and the part; The side of positioning table is provided with directed piece, the location benchmark R arc corresponding matching of the side of directed piece and part; Also be provided with fixation kit in the clamp body, fixation kit is connected and fixed positioning table and part, realizes fixing to clamp of part.

In the grinding jig of aforesaid assurance high accuracy axiality, described fixation kit comprises locating shaft, pressing plate and housing screw, offers the retaining thread hole on the locating shaft; Locating shaft passes clamp body, positioning table and part, and pressing plate is pressed on the part, and the retaining thread hole of passing on pressing plate and the locating shaft with housing screw is connected, and realizes fixing to clamp of part.

In the grinding jig of aforesaid assurance high accuracy axiality, the axis of positioning shaft hole is vertical with location datum level T on the described positioning table.

In the grinding jig of aforesaid assurance high accuracy axiality, described positioning table is provided with one or more balance pipes.

Compared with prior art, anchor clamps of the present utility model adopt tubular, and it is back coaxial with pipe by the rational locating hole of anchor clamps, locating surface and locating piece processed part to be fixed on the anchor clamps, to guarantee the axiality requirement in two holes on the part to be processed.Simple in structure but very compact, location ingenious, the easy manufacturing, easy to operate of the utility model, reliable clamping, machining accuracy height, cost is low, and balance is good when adjusting rotation, has satisfied processing request, guarantee crudy, guaranteed to produce needs, improved production efficiency.

Description of drawings

Fig. 1 is a perspective exploded view of the present utility model;

Fig. 2 is the schematic perspective view of the utility model institute processing parts;

Fig. 3 is a duty schematic perspective view of the present utility model;

Fig. 4 is a planar structure schematic diagram of the present utility model;

Fig. 5 is that the A of Fig. 4 is to view;

Fig. 6 is the floor map of the utility model institute processing parts;

Fig. 7 is that the B of Fig. 6 is to view.

Being labeled as in the accompanying drawing: 1-part, 2-clamp body, 3-positioning table, the directed piece of 4-, 5-fixation kit, 6-breach, 7-locating shaft, 8-pressing plate, 9-housing screw, 10-retaining thread hole, 11-balance pipe, the protruding handle of 12-.

The specific embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

Embodiment.A kind of guarantee high accuracy with grinding jig, be used for part when grinding accurate location and fix to clamp, constitute and to comprise clamp body; This grinding jig is by positioning table is set in clamp body, to realize the T face location of part; By directed piece being set, to realize the location, side of part in the positioning table side; By fixation kit is set in clamp body, to realize fixing to clamp of part; By on the tube wall of positioning table, offering breach, so that the fixing and positioning action of part; Offer balance pipe by side, with the balance clamp body at positioning table.

The utility model is shown in Fig. 1 and accompanying drawing 3, be used for part 1 when grinding accurate location and fix to clamp, constitute the clamp body 2 that comprises tubular, be provided with positioning table 3 in the clamp body 2, the angle α in C hole is consistent on the location datum level T face of the angle of inclination of positioning table 3 table tops and part and the part, its objective is that positioning table 3 is realized the T face location of part near the location benchmark T face of part in order to guarantee the position relation of part on clamp body; The side of positioning table 3 is provided with directed piece 4, and directed piece 4 is near the location benchmark R arc of part 1 side, realizes the location, side of part 1, and directed piece 4 is fixed on the screw hole of positioning table 3 through screw, and directed piece 4 is used for the angle beta of locating element 1; Also be provided with fixation kit 5 in the clamp body 2, fixation kit 5 is connected and fixed positioning table 3 and part 1, realizes fixing to clamp of part 1; Fixation kit 5 comprises locating shaft 7, pressing plate 8 and housing screw 9, offers retaining thread hole 10 on the locating shaft 7; Locating shaft 7 passes clamp body 2, positioning table 3 and part 1, and pressing plate 8 is pressed on the part 1, and the retaining thread hole of passing on pressing plate 8 and the locating shaft 7 with housing screw 9 10 is connected, and realizes fixing to clamp of part 1; The axis of positioning shaft hole is vertical with location datum level T on the positioning table 3, and described positioning shaft hole refers to the installing hole that locating shaft 7 is installed, and makes the axis of locating shaft 7 vertical with the table top of positioning table; The side of described positioning table 3 is provided with the balance pipe 11 of one or more balance clamp body 2 usefulness.

Fig. 2 is the schematic perspective view of part to be processed 1, part 1 be shaped as the U-shaped structure, part is provided with location benchmark T face, in the middle of the T face individual B hole is arranged, the two ends of part 1 are respectively equipped with C hole and D hole, the D hole is provided with protruding handle 12.This part 1 requires C hole and D hole coaxial, and error is not more than 0.02mm; Locate the axis tilt alpha degree in benchmark T face and C hole and D hole in addition; The axis in B hole is vertical with location datum level T face; The axis in the axis in B hole and C hole and D hole is non-intersect, and tolerance is arranged; Become the setting of β degree between the vertical center line in protruding handle 12 and D hole.

Fig. 3 is a duty schematic perspective view of the present utility model; When being fixed on part 1 on the clamp body 2, with inclined plane T on the part 1 and B hole is the location benchmark, part 1 conversely, the table top of inclined plane T on the part 1 and positioning table is fitted, to guarantee the tilt angle alpha of part 1 location datum level T, locating shaft 7 passes clamp body 2, positioning table 3 and part 1, and pressing plate 8 is pressed on the part 1; Again with the R orphan of the protruding handle 12 on the part 1 locating surface, with the requirement of the angle beta between the vertical center line that guarantees protruding handle 12 of part and D hole near directed piece 4; The retaining thread hole of passing on pressing plate 8 and the locating shaft 7 with housing screw 9 10 is connected at last, realizes fixing to clamp of part 1.

Specifically add man-hour, at first, soft pawl boring one cutter on the lathe, the refine locating surface is reduced to minimum to soft pawl to beating of machine axes; Secondly, part to be processed accurately location and reliable grip on clamp body; Then, with the clamp body clamping on the soft pawl of lathe, after processing a hole (C hole or D hole) and hole end surface, need not unload part to be processed, as long as unclamp the soft pawl of lathe, take off clamp body, clamp body is turned round 180 °, clamp body is refilled on the soft pawl that is clipped in lathe, process another hole (D hole or C hole) and hole end surface.

Coaxial accuracy is analyzed: 1, soft pawl depends on machine tool accuracy and lathe abrasion condition to beating of grinding machine axis, this operation machining tool is a precision grinder, so soft pawl is generally all very little to the numerical value of beating of grinding machine axis, specifically can check machine specifications, estimate maximum several μ.2, the error of anchor clamps installed surface; Because the shape of clamp body is a tubular, so pipe itself is coaxial, its error generally can be greater than 0.003mm.3, the alignment error of anchor clamps on soft pawl, this error amount is irregular, vary with each individual, but if careful sectional fixture, this numerical value can drop to minimum, this error amount is generally all very little, maximum several μ.By analysis and calculate, more than three sums of the deviations that principal element causes, be not more than the requirement of 0.02mm less than the axiality of part to be processed design, and have the certain precision deposit, can satisfy processing request fully.

Fine, simple in structure but very compact, ingenious, the reliable clamping in location of effect after the utility model is used, the machining accuracy height, easy to operate, cost is low, satisfies processing request, guarantees crudy, guarantees need of production, enhances productivity.

Claims

1. guarantee the grinding jig of high accuracy axiality, it is characterized in that: constitute the clamp body (2) that comprises tubular, be provided with positioning table (3) in the clamp body (2), the axis of positioning table (3) table top and clamp body (1) is obliquely installed, and the angle α in C hole is consistent on angle of inclination and part to be processed T face and the part; The side of positioning table (3) is provided with directed piece (4), the location benchmark R arc corresponding matching of the side of directed piece (4) and part; Also be provided with fixation kit (5) in the clamp body (2), fixation kit (5) is connected and fixed positioning table (3) and part (1), realizes fixing to clamp of part (1).

2. the grinding jig of assurance high accuracy axiality according to claim 1 is characterized in that: fixation kit (5) comprises locating shaft (7), pressing plate (8) and housing screw (9), offers retaining thread hole (10) on the locating shaft (7); Locating shaft (7) passes clamp body (2), positioning table (3) and part (1), pressing plate (8) is pressed on the part (1), the retaining thread hole of passing on pressing plate (8) and the locating shaft (7) with housing screw (9) (10) is connected, and realizes fixing to clamp of part (1).

3. the grinding jig of assurance high accuracy axiality according to claim 2 is characterized in that: the axis that described positioning table (3) is gone up positioning shaft hole is vertical with location datum level T.

4. according to the grinding jig of each described assurance high accuracy axiality of claim 1 to 3, it is characterized in that: described positioning table (3) is provided with one or more balance pipes (11).