CN203019055U - Auxiliary clamping and positioning device used for processing large-scale diesel cylinder cover bolt - Google Patents

Abstract

The utility model provides an auxiliary clamping and positioning device used for processing a large-scale diesel cylinder cover bolt. The auxiliary clamping and positioning device used for processing the large-scale diesel cylinder cover bolt comprises a hexagonal tyre and a center lining. The hexagonal tyre is a cylinder sleeve body, holes which are used for containing the heads of bolts are formed in the inner portion of the hexagonal tyre, the shapes of the holes are round and hexagonal and fit in with the shapes of the heads of the to-be-processed bolts, the bottom of each hole is in a hexagonal shape and evenly cuts the hexagonal tyre into three sections which are welded on three claws of a machine chuck in a welding method; and the tip lining is a cylinder sleeve body and is sleeved on a tail seat. When the auxiliary clamping and positioning device processes the large-scale diesel cylinder cover bolt, the head of a part is arranged on the three-claw chuck, a flange face of the head of the part is pasted closely on a processing tyre to be a locating basis and then the head of the part is clamped; the tail seat is moved forwards and the tail portion of the part is arranged into the center lining of the tail seat.

Description

The auxiliary clamp positioner that machining large cylinder of diesel engine bonnet bolt is used

Technical field

The utility model relates to a kind of machining positioning clamping device, particularly at the auxiliary positioning clamping device that uses man-hour that adds of large-scale diesel engine cylinder bolt.

Background technology

When using lathe machining large cylinder of diesel engine bonnet bolt, be used for part head six square chi very little less, shank of bolt is elongated, and middle gain in addition, processing gain chipping allowance is larger, and cutting force is relatively large, therefore use common lathe three-claw chuck and the top clamping of afterbody, annular groove is arranged again on the three-jaw clamping area, and contact-making surface is less, and during turning, head six aspects are easily crushed, during turning due to the phenomenon of expanding with heat and contract with cold, the elongated bending of section's bar processes rear part and can become dolioform, can not satisfy dimensional requirement.

Summary of the invention

The utility model is for above problem, designed the servicing unit of a cover Quick-clamped, location, can effectively improve the machining accuracy of this part, prevents that part from crushing.

The auxiliary clamp positioner that machining large cylinder of diesel engine bonnet bolt described in the utility model is used comprises six side's tires and top lining.

Six side's tires are the cylinder body, and its inside is provided with the hole that holds bolt head, the hole be shaped as circular hole and hexagonal hole, consistent with bolt head shape to be processed, the bottom, hole is hexahedron shape, and six side's tires are cut into three lobes equably, is welded in by welding manner on three pawls of machine chuck; Top lining is the cylinder body, and top lining is contained on tailstock.Add man-hour, first the part head is contained on scroll chuck, part head flanges face and technique tire are adjacent to as positioning datum, then clamp; Tailstock is moved forward, the part afterbody is encased in the top lining of tailstock again.Then starting lathe processes.Clamping part is owing to having increased contact area, and head six sides are difficult for being crushed.The angle of flange face is consistent with the aperture angle of technique tire, fits closely, makes the size after processing more consistent, afterbody is owing to having loaded onto a top lining, limited the circular runout of part, axially do not held out against, can reduce due to when cutting bar section extend the bending that causes because of heat expansion.

The use of the utility model device has not only improved the working (machining) efficiency of this part greatly, and has greatly improved the machining accuracy of part, has improved qualification rate.

Description of drawings

Fig. 1) be the assembling schematic diagram;

Fig. 2) be six side's the form of the foetus shape schematic diagrames;

Fig. 3) be six side's tire left views;

Fig. 4) be three-jaw shape schematic diagram after welding;

Fig. 5) be three-jaw left view after welding;

Fig. 6) be top lining shape schematic diagram;

Fig. 7) be part drawing to be processed.

The specific embodiment

The below is described in detail the utility model to process part shown in Figure 7 as example.

Six side's tires 2 are cut into three lobes, be welded on scroll chuck 1 by welding manner, pack in tailstock 4 top lining 3 and locking.Add man-hour, first part head six sides are contained on scroll chuck, flange face and technique tire are adjacent to as positioning datum, then clamp six sides.The part afterbody is encased in the top lining of tailstock again, then starts lathe and process.

Claims (1)

1. auxiliary clamp positioner that machining large cylinder of diesel engine bonnet bolt is used, it is characterized in that: positioner comprises six side's tires and top lining, six side's tires are the cylinder body, its inside is provided with the hole that holds bolt head, the hole be shaped as circular hole and hexagonal hole, consistent with bolt head shape to be processed, the bottom, hole is hexahedron shape, six side's tires are cut into three lobes equably, be welded in by welding manner on three pawls of machine chuck; Top lining is the cylinder body, and top lining is contained on tailstock.

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