CN201565678U

CN201565678U - Gear shaving clamp

Info

Publication number: CN201565678U
Application number: CN2009203144254U
Authority: CN
Inventors: ***
Original assignee: Chonche Group (sichuan) Danchi Parts & Components Co Ltd
Current assignee: Chonche Group (sichuan) Danchi Parts & Components Co Ltd
Priority date: 2009-11-10
Filing date: 2009-11-10
Publication date: 2010-09-01
Anticipated expiration: 2019-11-10

Abstract

The utility model discloses a gear shaving clamp, which comprises a step mandrel, a fixture block and a compression nut. The step mandrel is fixed between two centers of a machine tool. The gear shaving clamp is characterized in that two clamp bodies are connected to form the step mandrel; a cavity is formed inside the step mandrel; one of the clamp bodies is provided with a through hole communicated with the cavity; the compression nut passes through the through hole to be inserted into the cavity to make the cavity in the sealing state; and the cavity is filled with liquid plastic. The cavity is arranged in the step mandrel and is filled with the liquid plastic, thus, after a workpiece is arranged in the step mandrel, the gear shaving clamp transmits pressure to the liquid plastic in the cavity by spinning the compression nut to make the thin wall of the contact section of the step mandrel and the workpiece hole squeezed and deformed to increase so as to reduce a centering gap between the workpiece and the step mandrel, overcome the circular runout defect in the process of machining the workpiece and greatly improve the machining accuracy of the workpiece.

Description

A kind of gear shaving anchor clamps

Technical field

The utility model relates to a kind of Gear Processing anchor clamps, particularly a kind of anchor clamps that are used to process disc type gear.

Background technology

Involute cylindrical gear is a most widely used part of mechanical field, generally is divided into a type gear and disc type gear.General manufacturer substantially all adopts the fixed core frock when shaving processing disc type gear.

As shown in Figure 1, the Fixture for Gear-shaving of generally using mainly comprises step axle 1, fixture block 2 and clamp nut 3 now, using method is that workpiece 9 is packed on the step axle center 1, face of cylinder centering, and workpiece 9 end faces are resisted against on the step end face of step axle, press fixture block 2, compress by clamp nut 3, the both ends of the surface of workpiece 9 are fitted tightly with step end face and fixture block respectively, then with the lathe two top step axle two ends centre bores that hold out against, open lathe, process.

Yet; because generally there is machining tolerance in workpiece hole; size has fluctuation; after workpiece was packed axle into, can there be 0～0.02 gap usually in workpiece and axle, and Fixture for Gear-shaving does not upwards have clamp mechanism in the footpath of processing work in addition; cause centering precision to descend; so in reality processing, product can produce when shaving beats, thereby influences the machining accuracy of gear.

The utility model content

Goal of the invention of the present utility model is: at the problem of above-mentioned existence, a kind of clamp for machining of eliminating centering gap between workpiece and the step axle by internal expansion type is provided, add beating of radially going up man-hour thereby reduced workpiece greatly, improving the shaving machining accuracy of workpiece.

The technical solution of the utility model is achieved in that a kind of gear shaving anchor clamps, comprise step axle, fixture block and clamp nut, the step axle be fixed in lathe two top between, it is characterized in that: described step axle is formed by connecting by two clamp bodies and forms cavity in inside, have the through hole that is communicated with cavity on a clamp body therein, housing screw passes through hole and inserts in the cavity, and making cavity is air-tight state, is filled with liquid plastics in cavity.

Gear shaving anchor clamps described in the utility model, its another clamp body is provided with the airport that is communicated with cavity, and airport seals by seal.

Gear shaving anchor clamps described in the utility model, its described fixture block is " U " shape.

The utility model is by being provided with cavity in the step axle, filling liquid plastics in cavity, after workpiece is packed the step axle into, by the spinning housing screw, transmit pressure for the liquid plastics in the cavity, the thin-walled crimp of step axle and workpiece hole contact-segment is increased, thereby reduced centering gap between workpiece and the step axle, overcome the circular runout problem that workpiece adds man-hour, improved the machining accuracy of workpiece greatly.

Description of drawings

Fig. 1 is the structural representation of existing shaving clamp for machining.

Fig. 2 is a sectional view of the present utility model.

Fig. 3 is an assembling schematic diagram of the present utility model.

Fig. 4 is the assembling schematic diagram at the utility model another one visual angle.

Mark among the figure: 1 is the step axle, and 2 is fixture block, and 3 is clamp nut, and 4 is cavity, and 5 is through hole, and 6 is housing screw, and 7 is airport, and 8 is seal, and 9 is workpiece.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is done detailed explanation.

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

As Fig. 2, shown in 3 and 4, a kind of gear shaving anchor clamps, comprise step axle 1, fixture block 2 and clamp nut 3, fixture block 2 integral body are " U " shape, being convenient to the fixture block card presses, described step axle 1 is made up of clamp body 1a and clamp body 1b, clamp body 1a and clamp body 1b form a cavity 4 after by mutual socket in inside, and form cylinder simultaneously and constitute the contacted contact-segment in hole with workpiece 9, at the contact-segment place of step axle 1 is thin-walled, has the through hole 5 that is communicated with cavity 4 on described clamp body 1a, and housing screw 6 passes through hole 5 and inserts in the cavity 4, make cavity 4 be air-tight state, in cavity 4, be filled with liquid plastics; In order to make the filling liquid plastics convenient, on clamp body 1b, also be provided be communicated with cavity 4 be used to fill the time deaeration airport 7, the sealing of airport 7 or open by seal 8 and control.

Workpiece to be processed is packed on the step axle center, the cylinder surface that clamp body 1a and clamp body 1b socket form is used for centering, the workpiece front end face is resisted against on the step end face of step axle, rear end face at workpiece presses fixture block then, compress by clamp nut, the rear and front end face of workpiece is fitted tightly with step end face and fixture block respectively, this moment the spinning housing screw, transmit pressure for the liquid plastics in the cavity, with the thin-walled crimp of step axle and workpiece hole contact-segment and increase, thereby reduced centering gap between workpiece and the step axle, at last with the lathe two top step axle two ends centre bores that hold out against, open lathe, process.

Like this, workpiece is adding man-hour, owing to eliminated centering gap between workpiece and the step axle, thereby has overcome the circular runout problem that workpiece adds man-hour, has improved the machining accuracy of workpiece greatly.

The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. gear shaving anchor clamps, comprise step axle (1), fixture block (2) and clamp nut (3), step axle (1) be fixed in lathe two top between, it is characterized in that: described step axle (1) is made up of clamp body (1a) and clamp body (1b), clamp body (1a) and clamp body (1b) link together at inside formation cavity (4), on described clamp body (1a), have the through hole (5) that is communicated with cavity (4), housing screw (6) passes through hole (5) and inserts in the cavity (4), making cavity (4) is air-tight state, is filled with liquid plastics in cavity (4).

2. gear shaving anchor clamps according to claim 1 is characterized in that: clamp body (1b) is provided with the airport (7) that is communicated with cavity (4), and airport (7) seals by seal (8).

3. gear shaving anchor clamps according to claim 1 is characterized in that: described fixture block (2) is " U " shape.