CN202780821U

CN202780821U - Grinding fixture for stepped products

Info

Publication number: CN202780821U
Application number: CN201220439076.0U
Authority: CN
Inventors: 高建; 王军
Original assignee: Zigong Cemented Carbide Co Ltd
Current assignee: Zigong Cemented Carbide Co Ltd
Priority date: 2012-08-30
Filing date: 2012-08-30
Publication date: 2013-03-13
Anticipated expiration: 2022-08-30

Abstract

The utility model discloses a grinding fixture for stepped products. The grinding fixture comprises a clamp body, end caps and an annular bush, wherein two stepped products are clamped in the fixture; small external round surfaces of the two products are jointed; the stepped surfaces are opposite; the two jointed small external round surfaces are clamped and fixed in an inner hole of the bush; an outer round wall surface of the bush is clamped in an inner hole of the clamp body; and the end caps tightly press the products from the sides of the products on the clamp body. To process the inner holes of the same kind of stepped products, compared with the existing fixture, the fixture can improve the processing efficiency by more than 40%. The reusable bush can ensure the coaxiality of the products, and can effectively reduce the waste of the clamp body.

Description

The step products grinding fixture

Technical field

The utility model relates to a kind of machining frock, especially a kind of grinding fixture of step products.

Background technology

Grinding is taked for step products endoporus mass at present installation way such as Fig. 1, with the scroll chuck 1 clamping device body 2 on the equipment, after the clamp body clamping is finished, outside dimension according to the little periphery of step products carries out grinding to clamp body, when guaranteeing the clamp body rotation, the circular runout 0.01mm of endoporus, the little periphery of product 4 is fixed in the endoporus of clamp body, guarantee that the fit clearance of clamp body and product is in 0.02mm, end, 3 are pressed on product on the clamp body from the product side.Although this kind installation way can guarantee the machining accuracy of product, can realize the grinding of step products endoporus mass, there is the shortcoming of following three aspects:

(1) once can only clamping one, production efficiency is lower;

(2) when the external diameter of product hour, the fit clearance of product and anchor clamps is larger, it is overproof that grinding goes out the endoporus axiality of product, can only change clamp body;

(3) if change lower clamp body again clamping can't guarantee endoporus to the equipment axiality in 0.01, therefore the clamp body under the replacing can only be scrapped, and wastes larger.

Summary of the invention

The purpose of this utility model is: for the problem of above-mentioned existence, provide a kind of grinding fixture of step products.Adopt this frock can be when the step products inner hole grinding, two products processing of clamping, and the Product Precision that processes meets technological requirement.

In order to solve above technical problem, novel grinding fixture on original clamp body, end cap basis, has increased the lining of an annular, and lining is used for fixation workpiece; Adopt the grinding fixture of such structure, can two products with the level of clamped one time, the little periphery of two products joins, and step surface is relative, and two little peripheries that join fix in the endoporus of lining; The cylindrical wall clamping of lining is at the endoporus of clamp body, and end cap is pressed on product on the clamp body from the product side.By the cooperation of above-mentioned frock, can there be the product of step to be securely held in the frock with two, carry out the product inner hole grinding, after grinding is complete, product is taken out, in the utility model frock of again two products with the level being packed into.Reciprocal successively, thus the processing of mass endoporus finished.The utility model frock is particularly suitable for the in batches endoporus processing of step products, can process usefulness by Effective Raise, saves processing cost.Lining is reusable, can effectively reduce the waste of clamp body.

During converted products, axiality guarantees by lining, the little periphery fit clearance of lining endoporus and product is less than or equal to 0.02mm, and the axiality of the cylindrical of lining endoporus and product step is less than or equal in the 0.005mm, and the circular runout of clamp body endoporus is less than or equal to 0.005mm.Control product, lining and clamp body three's accumulated error can guarantee effectively that the axiality of product is 0.05mm in 0.03mm, guaranteed the precision of converted products.

Description of drawings

The utility model will illustrate by example and with reference to the mode of accompanying drawing, wherein:

Fig. 1 is that the prior art frock is used view.

Fig. 2 is that the utility model frock is used view.

Fig. 3 is the bush structure schematic diagram of embodiment.

Fig. 4 step products structural representation.

The specific embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.

The product with the level of the utility model processing comprises a periphery 5 and little periphery 6 as shown in Figure 4, has formed a step between periphery and the little periphery.The utility model frock of processing step product is comprised of clamp body 2, end cap 3 and lining 7 three parts as shown in Figure 2, and the structure of lining is a loop configuration as shown in Figure 3.Lining and two product clampings are in clamp body, and the little periphery of two products joins, and step surface is relative, and two little peripheries that join fix in the endoporus of lining, and end cap is pressed on product on the clamp body from the product side.

Hole dimension and the little excircle dimension of product are suitable in the lining, for the little cylindrical of various outer diameter, can design the lining of different endoporus, guarantee that the fit clearance of lining and product is in 0.02mm.The size of Outer Diameter of lining must be avoided interfering greater than the large excircle dimension of product, guarantees that simultaneously the axiality of lining endoporus and cylindrical is in 0.005mm.The interior hole dimension of clamp body and the outside dimension of ring bush are suitable, and the size of the inner groovy of end cap and the outside dimension of clamp body are suitable.

During use, with the three-jaw endoporus chuck 1 clamping device body 2 on the lathe, according to the endoporus of the big or small clamp body of lining 7 external diameters, guarantee in the clamp body endoporus circular runout 0.005mm, and lining and clamp body fit clearance 0.005mm.During the converted products endoporus, control product, lining and clamp body three's accumulated error can guarantee effectively that the axiality of product is in 0.05mm in 0.03.

Take frock clamp of the present utility model to process, for the same step products, working (machining) efficiency can improve more than 40%, average single-piece production can be saved 2 yuan, calculate according to producing per month 2.5 ten thousand step products, can save 50,000 yuan production cost, can save 600,000 yuan production cost every year, the axiality of product guarantees by reusable lining in addition, can effectively reduce the waste of clamp body.

The above only is preferred embodiment of the present utility model, all any modifications of doing within spirit of the present utility model and principle, is equal to and replaces and improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. the step products grinding fixture comprises clamp body and end cap, it is characterized in that: the lining that also comprises annular; Grinding fixture is in-built to accompany two products with the level; The little periphery of described two products joins, and the step periphery is relative, and two little peripheries that join fix in the endoporus of lining; The cylindrical wall clamping of lining is at the endoporus of clamp body, and end cap is pressed on product on the clamp body from the product side.

2. step products grinding fixture according to claim 1, it is characterized in that: the little periphery fit clearance of described lining endoporus and product is less than or equal to 0.02mm.

3. step products grinding fixture according to claim 1, it is characterized in that: the axiality of described lining endoporus and product step cylindrical is less than or equal in the 0.005mm.

4. step products grinding fixture according to claim 1, it is characterized in that: the circular runout of described clamp body endoporus is less than or equal to 0.005mm.