CN215789209U - Special shot peening strengthening tool with chamfering bolt - Google Patents

Abstract

The utility model belongs to the field of machining, and particularly relates to a special shot peening strengthening tool with a chamfer bolt. Bolts on the aircraft are usually designed by polished rods due to special requirements, and shot peening needs to be performed on the polished rods for prolonging the service life. The shot peening strengthening tool comprises a stud protection tool and a bolt hexagonal head protection tool, wherein the stud protection tool is a head protection sleeve which is connected with a stud through threads and covers a thread section and the end face of the thread section; the bolt hexagonal head protection tool comprises a hexagonal through hole cylinder, a hexagonal head of a bolt is inserted into the hexagonal through hole and supported by a hexagonal cushion block, and the hexagonal cushion block is clamped and fixed after being radially connected with a threaded hole of the hexagonal through hole cylinder through a screw; and a chamfer cover plate is fixedly covered at the chamfer position. Effectively shields all surfaces and chamfers of the parts which can not be shot-blasted, well fixes the parts, and well protects and limits the parts in all directions.

Description

Special shot peening strengthening tool with chamfering bolt

Technical Field

The utility model belongs to the field of machining, and particularly relates to a special shot peening strengthening tool with a chamfer bolt.

Background

The bolt is a common part, is widely applied to mechanical assembly and plays a role in pressing and positioning. Bolts on the aircraft are usually designed by polished rods due to special requirements, and shot peening needs to be performed on the polished rods for prolonging the service life.

A typical such bolt is shown in fig. 1, having a hexagonal head at one end of the polished rod, a threaded segment 5 and a threaded segment end face 6 at the other end, the hexagonal head having hexagonal head side faces 4 and hexagonal head end faces 3, wherein the bottom edges of a pair of hexagonal head end faces 3 have side chamfers 1, 2, wherein only the region of the polished rod is to be peened, and the other regions are not to be peened and need to be protected.

Difficulties in shot peening of such parts: one end of the hexagonal head is inconvenient to clamp, if a common three-jaw chuck is used for clamping, a part of the hexagonal head is exposed, but the hexagonal side face and two chamfers can not be subjected to shot blasting and need to be protected. The end face of the hexagonal head connected with the polished rod is a shot blasting transition region which can be sprayed or not sprayed, but the end face, the side face and two chamfers of the end face of the hexagonal head can not be subjected to shot blasting, and the small end of the part is a thread and can not be subjected to shot blasting, and all the parts need to be covered. At present, an effective shot blasting clamping scheme is lacked.

SUMMERY OF THE UTILITY MODEL

The purpose of the utility model is as follows: in order to ensure that the qualified coverage rate is obtained in the shot blasting process of the bolt shot blasting area, the non-shot blasting area is reasonably protected, and meanwhile, the clamping is convenient, and the shot blasting strengthening tool which is practical, effective, quick and suitable for the chamfered bolt is specially provided.

The utility model provides a special shot peening tool for a bolt with a chamfer, wherein the main body of the rod part of the bolt is a polished rod, one end of the rod part is provided with a hexagonal head, the other end of the rod part is provided with a stud, the lower edge of the hexagonal head is provided with a chamfer, the tool comprises a stud protection tool and a bolt hexagonal head protection tool, and the tool comprises a stud protection tool and a bolt hexagonal head protection tool

The stud protection tool is a head protection sleeve which is connected with the stud through threads and covers the thread section and the end face of the thread section;

the bolt hexagonal head protection tool comprises a hexagonal through hole cylinder, a hexagonal head of a bolt is inserted into the hexagonal through hole and supported by a hexagonal cushion block, and the hexagonal cushion block is clamped and fixed after being radially connected with a threaded hole of the hexagonal through hole cylinder through a screw; a chamfer cover plate is fixedly covered at the chamfer position;

the three-jaw chuck clamps the hexagonal through-hole cylinder.

Advantageously, the bolt has a first chamfer and a second chamfer symmetrically arranged at the lower edge of the hexagon head, and the first chamfer and the second chamfer are respectively covered by a first chamfer cover plate and a second chamfer cover plate.

Advantageously, the first chamfered cover plate is fixed to the end face of the hexagonal through-hole cylinder by a third screw, and the second chamfered cover plate is fixed to the end face of the hexagonal through-hole cylinder by a fourth screw.

Advantageously, the first screw and the second screw are used for clamping and fixing the hexagonal cushion block.

Advantageously, the hexagonal spacer has a resilient clamping mechanism acting to apply pressure to the hexagonal head.

Advantageously, the resilient clamping mechanism is formed by a spring in combination with a pad.

The utility model has the beneficial effects that: unlike conventional machining methods, where the part is clamped directly with a three-jaw chuck, the partially non-peened surface is not effectively protected. The tool disclosed by the utility model effectively shields all surfaces and chamfers of parts which can not be shot-blasted by using the forms of a thread protection tool, a base, a cushion block and a chamfer cover plate, and simultaneously well fixes the parts, and is well protected and limited in all directions.

Compare in directly with six square heads of three-jaw chuck clamping, the clamping area of contact of clamping frock base is bigger, so can prevent effectively that the part from adorning askewly, lead to the inhomogeneous condition of peening to take place, improved the part qualification rate.

Drawings

The illustrative examples, as well as a preferred mode of use, further objectives, and descriptions thereof, will best be understood by reference to the following detailed description of an example of the present invention when read in conjunction with the accompanying drawings, wherein:

FIG. 1 is a schematic structural view of a chamfered bolt;

FIG. 2 is an oblique view of the shot peening tool of the present invention;

FIG. 3 is a schematic view of a tool assembly for a hexagonal head of a bolt;

fig. 4 is a bolt head protective sleeve.

The method comprises the following steps of 1-first chamfering, 2-second chamfering, 3-hexagonal head end face, 4-hexagonal head side face, 5-thread section, 6-thread section end face, 7-hexagonal through hole cylinder, 8-hexagonal cushion block, 9-bolt head protective sleeve, 10-first bolt, 11-first chamfering cover plate, 12-third bolt, 13-second chamfering cover plate, 14-fourth bolt, and 15-second bolt

Detailed Description

The disclosed examples will be described more fully with reference to the accompanying drawings, in which some (but not all) of the disclosed examples are shown. Indeed, many different examples may be described and should not be construed as limited to the examples set forth herein. Rather, these examples are described so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

Referring to fig. 3, the base is a hexagonal through-hole cylinder 7 for connecting the bolt with a three-jaw chuck of a machine tool, the hexagonal head of the bolt is sunk into the base, a hexagonal cushion block 8 is arranged inside the base, the hexagonal cushion block plays a role in propping against the bolt and preventing sinking, the hexagonal cushion block has an upward elastic self-adaption function, the bolt can be automatically jacked to a preset height, the cushion block 8 is jacked through two screws 10 on the side surface of the base 15, two chamfer cover plates 11 and 13 are arranged on the upper portion of the base and cover two chamfers on the upper surface of the hexagonal head and are matched with the hexagonal cushion block 8 at the same time, the freedom degree of the bolt in the vertical direction is respectively limited at the upper and lower ends, the bolts are screwed and fixed through two screws 12 and 14, the small end of a part is protected by a thread protection tool 9, the internal thread of the thread protection tool is matched with the external thread of the bolt, and the thread is prevented from being damaged in the shot blasting process.

1. Screwing the small end by using a thread protection tool to protect the thread of the small end of the bolt;

2. the small-end thread protection tool is guaranteed to completely protect the threads, and an R angle between the threads and the polished rod is not shielded;

3. putting one end of the hexagonal head into the base;

4. the bottom of the hexagonal head is contacted with the hexagonal cushion block;

5. use the apron to push down two chamfers, guarantee apron chamfer and bolt chamfer laminating

6. Screwing two screws on the cover plate;

7. confirming that a hexagonal cushion block in the base jacks up the bolt to contact the cover plate;

8. screwing two screws on the side surface of the base to tightly prop against a cushion block in the base;

9. the whole tool is checked to be installed without a gap with parts, and all parts are well attached without shaking;

10. the base was clamped using a three-jaw chuck and shot blasting was started.

Different examples of the systems, devices, and methods disclosed herein include various components, features, and functions. It should be understood that the various examples of the systems, devices, and methods disclosed herein may include any of the components, features, and functions of any of the other examples of the systems, devices, and methods disclosed herein in any combination or sub-combination, and all such possibilities are intended to fall within the scope of the present invention.

The description of the different advantageous arrangements has been presented for purposes of illustration and description, but is not intended to be exhaustive or limited to the examples in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. Additionally, the different advantageous examples may describe different advantages as compared to other advantageous examples. The example or examples selected are chosen and described in order to best explain the principles of the examples, the practical application, and to enable others of ordinary skill in the art to understand the disclosure for various examples with various modifications as are suited to the particular use contemplated.

Claims (6)

1. The utility model provides a frock is reinforceed to peening of taking chamfer bolt is exclusively used in, this bolt pole portion main part be the polished rod, be the hexagon head at its one end, the other end is the double-screw bolt, the lower limb of hexagon head has the chamfer, its characterized in that: the tool comprises a stud protection tool and a bolt hexagonal head protection tool, wherein

The stud protection tool is a head protection sleeve (9) which is connected with the stud through threads and covers the threaded section (5) and the end face (6) of the threaded section;

the bolt hexagonal head protection tool comprises a hexagonal through hole cylinder (7), a hexagonal head of a bolt is inserted into the hexagonal through hole and supported by a hexagonal cushion block (8), and the hexagonal cushion block (8) is clamped and fixed after being radially connected with a threaded hole of the hexagonal through hole cylinder (7) through a screw; a chamfer cover plate is fixedly covered at the chamfer position;

the hexagonal through-hole cylinder (7) is clamped by a three-jaw chuck.

2. The shot peening tool of claim 1, wherein: the bolt is provided with a first chamfer (1) and a second chamfer (2) which are symmetrically arranged at the lower edge of the hexagon head, and the first chamfer cover plate (11) and the second chamfer cover plate (13) are respectively used for covering.

3. The shot peening tool of claim 2, wherein: the first chamfer cover plate (11) is fixed on the end surface of the hexagonal through hole cylinder (7) through a third screw (12), and the second chamfer cover plate (13) is fixed on the end surface of the hexagonal through hole cylinder (7) through a fourth screw (14).

4. The shot peening tool of claim 1, wherein: and clamping and fixing the hexagonal cushion block (8) by adopting a first screw (10) and a second screw (15).

5. The shot peening tool of claim 1, wherein: the hexagonal cushion block (8) is provided with a rebound clamping mechanism and has the function of applying pressure to the hexagonal head.

6. The shot peening tool of claim 5, wherein: the rebound clamping mechanism is formed by combining a spring and a cushion block.

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