Auxiliary clamp for machining outer diameter of projectile body

Abstract

The utility model belongs to the technical field of numerical control turning, and discloses an auxiliary clamp for machining the outer diameter of a projectile body, which comprises a tip (1), a guide sleeve (2) and a workpiece (3), the guide sleeve (2) is of a revolving body structure, a simulation centering hole (5) is formed in the left end face of the guide sleeve (2), and an auxiliary inclined plane (6) is arranged on the outer side face of the right end; the simulated centering hole (5) corresponds to the bottom nest centering hole (4) of the workpiece (3) in position; the taper of the auxiliary inclined surface (6) is consistent with that of the inner bore of the workpiece (3); the guide sleeve (2) is arranged at an opening of a workpiece (3), and the center (1) abuts against the simulation centering hole (5). The outer diameter of an unqualified workpiece can be machined without a process centering hole, the rejection rate of products is reduced, and the machining cost is saved on the premise that the product quality is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to numerical control turning technical field especially relates to a kind of auxiliary fixture for processing projectile outer diameter. BACKGROUND

[0002] The outer diameter and inner bore of projectile need to be numerically controlled to be turned, due to batch production, process differentiation is very fine, the drilling centering hole, turning profile, turning bottom socket and other processes of each projectile are completed by different equipment and operators, so that after all process turning is completed, when the defect of turning outer diameter process is found in rechecking, since the process centering hole reference has been turned by the latter process, it is difficult to complete the repair work of turning profile process, unnecessary workpiece waste product is caused, manufacturing cost is increased. SUMMARY

[0003] The technical problem to be solved by the utility model is: how to carry out secondary processing to unqualified workpiece.

[0004] To solve the above technical problem, the specific technical scheme of the utility model is as follows:

[0005] A kind of auxiliary fixture for processing projectile outer diameter, including centre 1, guide sleeve 2, workpiece 3;

[0006] The guide sleeve 2 is set to the structure of revolved solid, and the left end face is provided with simulation centering hole 5, and the right end outer side is set to auxiliary inclined plane 6;Simulation centering hole 5 and the bottom socket centering hole 4 of workpiece 3 position correspond;The taper of auxiliary inclined plane 6 is consistent with the taper of the inner bore of workpiece 3;

[0007] The guide sleeve 2 is set at the opening of workpiece 3, and centre 1 is tightly pressed simulation centering hole 5.

[0008] The centre 1 is part of machine tool.

[0009] The utility model has the following advantages: unqualified workpiece outer diameter can be processed without process centering hole, product rejection rate is reduced, processing cost is saved under the premise of guaranteeing product quality. DRAWINGS

[0010] Fig. 1 It is auxiliary fixture working principle structure schematic view of the utility model;

[0011] Fig. 2 It is guide sleeve shape diagram;

[0012] Marked in the figure: 1, centre;2, guide sleeve;3, workpiece;4, bottom socket centering hole;5, simulation centering hole;6, auxiliary inclined plane. DETAILED DESCRIPTION

[0013] In order to better understand the purpose, structure and function of the utility model, the utility model is further described in detail below in combination with the drawings.

[0014] As shown in Figs. 1-2 The utility model discloses an auxiliary fixture, including the centre 1, the guide sleeve 2, the workpiece 3, the bottom hole centering hole 4.

[0015] The guide sleeve 2 has simulation centering hole 5 and auxiliary inclined plane 6.

[0016] The centre 1, the tip of centre 1 is matched with the taper of bottom hole centering hole 4 or guide sleeve 2, realizes the clamping positioning effect to workpiece 3.

[0017] The guide sleeve 2, the left side of guide sleeve 2 is provided with simulation centering hole 5, and the right side is matched with the inner bore taper of workpiece 3, realizes that workpiece 3 can also realize the repair of the outer diameter shape of workpiece 3 in the absence of bottom hole centering hole 4.

[0018] Workpiece 3, the outer diameter of the component needing processing.

[0019] Bottom hole centering hole 4, in the drilling centering hole process of workpiece 3, it is the process centering hole's effect of clamping positioning for the turning shape process of workpiece 3.

[0020] Simulation centering hole 5, same as bottom hole centering hole shape, plays the role of auxiliary clamping positioning for the turning outer diameter process of workpiece 3.

[0021] Auxiliary inclined plane 6, the taper of auxiliary inclined plane 6 is matched with the inner bore taper of workpiece 3, makes guide sleeve 2 connect with workpiece 3, forms a whole, makes guide sleeve 2 play the role of replacing bottom hole centering hole 4.

[0022] The structure of guide sleeve simulates the process centering hole of workpiece blank on one side, and is closely attached to the processed workpiece on the other side, so that the rough outer diameter defect found in the turning outer diameter process after the whole process of the workpiece can be repaired with precision under the action of the auxiliary fixture guide sleeve without the process centering hole.

[0023] The elastic body of the rough outer diameter defect found in the rechecking process can be returned to the turning shape process, the inner bore inclined surface of the workpiece 3 is matched with the hand-held guide sleeve 2, then the centre 1 of the machine tool is advanced by pressing the button, the simulation centering hole 5 of the guide sleeve 2 is tightly contacted with the centre 1, the hand-held action is released, the clamping positioning of the workpiece is completed, finally the turning machine is started to execute the numerical control processing program, and the outer diameter defect of the workpiece 3 is repaired.

[0024] Although the embodiments of the present application are described in conjunction with the drawings, a number of variations and modifications can be made by those skilled in the art without departing from the principles of the present application, and these should also be considered as falling within the scope of the present application.

Claims

1. An auxiliary fixture for machining the outside diameter of a projectile body, characterized in that, It comprises a center (1), a guide sleeve (2) and a workpiece (3). The guide sleeve (2) is in the shape of a rotary body, and the left end surface is provided with a simulation centering hole (5), and the right end outer surface is provided with an auxiliary inclined surface (6); the simulation centering hole (5) corresponds to the bottom hole centering hole (4) of the workpiece (3); the taper of the auxiliary inclined surface (6) is consistent with the taper of the inner bore of the workpiece (3). The guide sleeve (2) is arranged at the opening of the workpiece (3), and the center (1) is tightly pressed against the simulation centering hole (5).

2. The auxiliary fixture for machining the outer diameter of the bullet body according to claim 1, characterized in that, The center is a part of a machine tool.

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