CN205111752U - C70 type open car overhauls special drift - Google Patents

Abstract

The utility model discloses a C70-type gondola car inspection and maintenance special punch, which relates to the technical field of maintenance tools, and includes a connection part connected with a pneumatic tool and a force application part, the force application part is a cone, and the taper of the cone is α, the force application part is connected to the connection part through a transition section, and the transition section is a curved body of revolution formed by a section of arc as a generatrix. Use the force application part to apply external force to the corroded bolt root, the connection part is convenient to connect with the pneumatic tool for operation, the force application part of the cone is more conducive to entering the bolt hole during the bolt withdrawal process, and the connection part and the force application part pass through the curved surface The transition sections of the rotating body are connected to avoid stress concentration. The utility model has the advantages of simple structure and convenient operation, can realize the purpose of one-time unloading of the bolts of the buckle seat of the C70 type open car, improves the service life of the punch, reduces the cost of tools, and improves the unloading of the bolts of the buckle seat of the C70 type open car. work efficiency.

Description

C70 type gondola car maintenance special punch

technical field

The utility model relates to the technical field of maintenance tools, in particular to a special punch for maintenance of a C70 type gondola car.

Background technique

When the maintenance workshop overhauls the open car body, the car body needs to be disassembled in the dismantling work area. Due to the serious corrosion of the rivets and bolts, the punching and shearing process is used during the disassembly, that is, the exposed part is cut, and the matching part with the car body is used. The punch is ejected to complete the unloading operation, and the punch used in this process is a consumable. At present, the number of C70 gondola cars overhauled by the company accounts for more than 30% of the total and there is an upward trend. The bolt hole diameter of the C70 gondola car buckle seat is φ17 and the hole depth is 70mm. There is currently no special tool for the C70 gondola car in the workshop. The employees use ordinary punches The removal and unloading of bolts needs to be done several times, and the punches have to be replaced repeatedly, which is time-consuming and laborious; at the same time, employees need to use the grinder to repair the punches, which not only affects the normal production order, but also the punches modified by themselves are easy to break, resulting in cost waste.

Utility model content

The technical problem to be solved by the utility model is to provide a C70-type gondola car inspection and maintenance special punch with simple structure and convenient operation, which can realize the purpose of one-time withdrawal and removal of bolts.

In order to solve the problems of the technologies described above, the technical solution adopted by the utility model is:

A C70-type gondola car inspection and maintenance special punch, including a connection part connected with a pneumatic tool and a force application part, the force application part is a cone, the taper of the cone is α, and the force application part passes through the transition section Connected with the connection part, the transition section is a curved body of revolution formed by a section of arc as the generatrix.

Preferably, the root of the connecting part is provided with an annular boss connected to the transition section, and the connecting part and the annular boss have a circular arc transition, and the transition radius is r; the force applying part and the transition section have a circular arc transition, and the transition The radius is R; the end of the connecting part is chamfered.

Preferably, the taper α of the force applying portion is 1°, the length L of the connecting portion and the force applying portion is both 80 mm, the diameter d1 of the large end of the force applying portion is 16 mm, and the diameter d2 of the connecting portion is 31 mm. The diameter d3 of the large end of the transition section is 30mm, the diameter D of the annular boss at the root of the connecting part is 40mm; the transition radius r is 4.5mm, and R is 10mm.

Preferably, the material of the punch is T8A, and the surface hardness of the punch is HRC48-52.

The beneficial effect of adopting the above technical solution is that: the force application part is used to apply external force to the corroded bolt root, and the connecting part is connected with the pneumatic tool, which is convenient for the operator to operate. It is beneficial to enter the bolt hole, and the connection part and the annular boss, the force application part and the transition section are all circular arc transitions and curved surface transition sections, which can avoid the occurrence of stress concentration. The utility model has the advantages of simple structure and convenient operation, can realize the purpose of one-time unloading of the bolts of the buckle seat of the C70 type open car, improves the service life of the punch, reduces the cost of tools, and improves the unloading of the bolts of the buckle seat of the C70 type open car. work efficiency.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment;

In the figure: 1-connection part, 2-force application part, 3-transition section, 4-boss.

detailed description

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

As shown in Figure 1, a C70-type gondola car maintenance special punch includes a connecting part 1 connected with the pneumatic tool and a force application part 2, the force application part 2 is a cone, and the taper of the cone is α , the force applying part 2 is connected to the connecting part 1 through a transition section 3, and the transition section 3 is a curved body of revolution formed by a section of a circular arc as a generatrix. The root of the connecting part 1 is provided with an annular boss 4 connected to the transition section 3, and the junction between the connecting part 1 and the annular boss 4 has a circular arc transition, and the transition radius is r; the force applying part 2 and the tapered transition section 3 arc transition, the transition radius is R; the end of the connecting part 1 is chamfered. The transition section 3 is a curved body of revolution, the tail of the cone of the force application part 2 and the transition section 3 and the connection between the connection part 1 and the annular boss 4 adopt circular arc transitions, which can avoid stress concentration; the cone of the force application part 2 The size is designed to be slightly smaller than the major diameter of the bolt, and the length is greater than the length of the bolt hole, so that the force application part 2 can penetrate the bolt hole as the action part of the punch to realize the removal of the bolt.

In order to match the size of the bolt hole of the buckle seat of the C70 type gondola, the taper α of the force applying part 2 is 1°, the length L of the connecting part 1 and the force applying part 2 is 80 mm, and the force applying part 2 The diameter d1 of the large end is 16 mm, the diameter d2 of the connecting part 1 is 31 mm, the diameter d3 of the large end of the tapered transition section 3 is 30 mm, the diameter D of the annular boss 4 at the root of the connecting part 1 is 40 mm; the transition radius r is 4.5 mm and R are 10mm.

In order to improve the mechanical performance of the punch, the material of the punch is T8A, and the surface hardness of the punch is HRC48-52. The heat treatment adopts quenching and high temperature tempering, so that the hardness of the punch surface after heat treatment is controlled at HRC48-52, which is to improve the toughness of the punch and reduce the damage rate of the punch, while the conventional punch needs to meet the enterprise standard HRC50-55.

In summary, the utility model has the advantages of simple structure and convenient operation. The force application part is used to apply external force to the rusted bolt root, and the connection part is connected with the pneumatic tool, which is convenient for the operator to hold the pneumatic tool to operate. Force application, the force application part of the cone is more conducive to entering the bolt hole during the bolt withdrawal process, and the connection part and the annular boss, as well as the force application part and the tapered transition section are arc transitions, which can avoid the occurrence of stress concentration . The utility model can realize the purpose of one-time unloading of the C70 type gondola car hasp seat bolts, improve the service life of the punch, reduce tool costs, and improve the operation efficiency of the C70 type gondola car hasp seat bolt unloading.

Claims (4)

1. A special punch for C70 type gondola car maintenance, characterized in that it includes a connecting part (1) connected with the pneumatic tool and a force application part (2), the force application part (2) is a cone, and the force application part (2) is a cone. The taper of the cone is α, and the force applying part (2) is connected to the connecting part (1) through a transition section (3), and the transition section (3) is a curved body of revolution formed by a section of arc as a generatrix. 2. The special punch for C70 type gondola car maintenance according to claim 1, characterized in that: the root of the connecting part (1) is provided with an annular boss (4) connected with the transition section (3), and the connecting part ( 1) There is a circular arc transition at the joint with the annular boss (4), and the transition radius is r; the circular arc transition between the force applying part (2) and the transition section (3) is R; the connecting part (1) Chamfered ends. 3. The special punch for C70 type gondola car maintenance according to claim 2, characterized in that: the taper α of the force application part (2) is 1°, the connection part (1) and the force application part (2) The length L of each is 80mm, the diameter d1 of the large end of the force applying part (2) is 16mm, the diameter d2 of the connecting part (1) is 31mm, the diameter d3 of the large end of the transition section (3) is 30mm, and the connecting part ( 1) The diameter D of the annular boss (4) at the root is 40mm; the transition radius r is 4.5mm, and R is 10mm. 4. The special punch for inspection and maintenance of C70 type gondola car according to claim 1, characterized in that: the material of the punch is T8A, and the surface hardness of the punch is HRC48-52.