CN216550559U

CN216550559U - Workpiece aperture reducing device for locally heating hole wall of workpiece hole body

Info

Publication number: CN216550559U
Application number: CN202122673749.0U
Authority: CN
Inventors: 刘泉溪; 刘庆
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-03
Filing date: 2021-11-03
Publication date: 2022-05-17
Anticipated expiration: 2031-11-03
Also published as: DE202022106097U1

Abstract

The utility model relates to the field of machinery, in particular to a workpiece aperture reducing device for locally heating the wall of a workpiece hole body hole, which comprises a high-frequency quenching machine and a copper pipe heating inductor which can be placed in the workpiece hole, wherein a pipe body of a copper pipe heater is sequentially provided with an insulating and heat-insulating layer, a copper pipe and a cooling channel in the copper pipe from outside to inside, and compared with the prior art, the workpiece aperture reducing device has the advantages that: the method has the advantages of simple and easy operation, uniform metal heating of the inner wall of the hole, quick operation, lower processing cost, wider application range, very high practicability and economy, better control performance on the precision of the processed hole and capability of avoiding a large part of loss caused by scrapping of workpieces during machining; can be used for repairing parts which are only scrapped due to hole abrasion; the method has small influence on the overall precision and strength of the part while reducing the aperture, so the method can be applied to mechanical assembly for reducing the cost and simplifying the working procedure.

Description

Workpiece aperture reducing device for locally heating hole wall of workpiece hole body

Technical Field

The utility model relates to the field of machinery, in particular to a workpiece aperture reducing device for locally heating a hole wall of a workpiece hole body.

Background

In the past, the factory adopts a tool for finely machining the central hole of the gear by using an extrusion rod machining method on a lathe, workers cannot accurately master the tool, so that the size of the gear hole in batch production is out of tolerance, and after a plurality of tests, the novel inner hole heating inductor for the high-frequency quenching machine is designed, and corresponding using methods are summarized. Successfully reduces the hole with the out-of-tolerance of 0.12mm to the tolerance range on a high-frequency quenching machine. And the column-returning errors of the reduced holes are within 0.02mm, so that the requirements of continuous processing are met, and the great economic loss is saved. The design principle is as follows: according to the method, after the critical quenching temperature of the steel material in the inner hole of the workpiece is locally reached, the metal crystal structure can be changed to a certain degree, and meanwhile, certain stress can be generated.

In the heat treatment processing that involves, the deformation that produces after the processing is difficult to control, and this hole heating inductor does not adopt the close ring spiral induction mode, because of its spiral external diameter response pore wall, and the rate of heating is too fast can't carry out accurate regulation and control, and bulky, and the inhomogeneous scheduling problem of heating can't be used for the shrinkage cavity work. The heating inductor designed later adopts a mode of evenly dividing longitudinal heating for 90 degrees in the hole, so that the controllability of the heating depth of the hole wall is greatly improved, and the heating in the hole is more uniform to a certain extent. The heating induction coil is simpler to manufacture and is easier to manufacture, smaller holes can be conveniently penetrated, and meanwhile, because the heating induction coil uniformly heats only the shallower part of the hole wall in the holes and the use power is easy to control, the hole diameter of a workpiece can be reduced, and meanwhile, the deformation of the workpiece generated by heating is controlled to the extent that the subsequent use is not influenced basically.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides a workpiece hole diameter reducing device for locally heating the hole wall of a workpiece hole body.

In order to solve the technical problems, the technical scheme provided by the utility model is a workpiece aperture reducing device for locally heating the hole wall of a workpiece hole body, which comprises a high-frequency quenching machine and a copper pipe heating inductor capable of being placed in the workpiece hole, wherein a pipe body of the copper pipe heating inductor is sequentially provided with an insulating heat-insulating layer, a copper pipe and a cooling channel from outside to inside.

Compared with the prior art, the utility model has the advantages that:

1. the method has the advantages of simple and easy operation, uniform metal heating of the inner wall of the hole, quick operation, lower processing cost, wider application range, very high practicability and economy, better control performance on the precision of the processed hole and capability of avoiding a large part of loss caused by scrapping of workpieces during machining;

2. can be used for repairing parts which are only scrapped due to hole abrasion;

3. the method has the advantages that the influence on the overall accuracy and strength of the part is small while the aperture is reduced, so that the method can be applied to mechanical assembly for reducing the cost and simplifying the working procedure.

4. The high-frequency quenching machine required by the implementation of the method can meet the use requirement only by a low-power small-sized special high-frequency quenching machine, so that the method also meets the energy-saving and environment-friendly requirement advocated by the state.

Drawings

FIG. 1 is a schematic view of a heating apparatus;

FIG. 2 is a schematic sectional view A-A;

FIG. 3 is a schematic sectional view B-B.

As shown in fig. 1-3: 1. the high-frequency quenching machine comprises a high-frequency quenching machine 2, a copper pipe heating inductor 201, an insulating and heat-insulating layer 202, a copper pipe 203, a cooling channel 3, a workpiece 4 and a heat-resistant cushion block.

Detailed Description

The method and apparatus for reducing the inner diameter of the hole body of the component by local heating according to the present invention will be described in further detail with reference to the accompanying drawings.

With reference to fig. 1-3, a workpiece aperture reducing device for locally heating a wall of a workpiece hole comprises a high-frequency quenching machine 1 and a copper tube heating inductor 2 capable of being placed in the hole of the workpiece 3, wherein a tube body of the copper tube heating inductor 2 is sequentially provided with an insulating and heat-insulating layer 201, a copper tube 202 and a cooling channel 203 from outside to inside.

In the concrete implementation of the utility model, a workpiece needing to be heated is placed on the upper part of the heat-resistant cushion block, a copper pipe heating inductor extends into a workpiece hole, the copper pipe heating inductor is not contacted with the inner wall of the workpiece hole, the heating time, the current and the frequency parameters of the high-frequency quenching machine are set, the heat preservation time is set, the high-frequency quenching machine is started, the copper pipe heating inductor extends into the workpiece hole, the heating depth range of the hole diameter is adjusted between 3 mm and 15mm according to the size requirement of the reduced hole diameter, after the heating is finished, the workpiece is cooled by generally adopting natural cooling or water cooling oil cooling or lime heat preservation according to the different requirements of subsequent use, the size and the cylindricity of the inner diameter of the reduced workpiece hole are measured by using an inner diameter gauge, and the following conclusion is obtained by testing the workpiece holes of various different steels, wherein 1, the steel part without heat treatment has a reduced range larger than that the steel part which is subjected to heat treatment, the diameter of the hole after the maximum reduction range in the test is reduced by 0.12mm compared with the diameter of the treated hole; 2. the hole wall of the workpiece is heated in the range of 3-15mm at night, so that the influence on the cylindricity of the hole of the part is small, and the deformation error of the cylindricity is less than 0.02 mm.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A workpiece aperture reducing device for locally heating the wall of a workpiece hole body is characterized in that: the high-frequency quenching device comprises a high-frequency quenching machine (1) and a copper pipe heating inductor (2) which can be placed in a central hole of a workpiece (3), wherein a pipe body of the copper pipe heating inductor (2) is sequentially provided with an insulating and heat-insulating layer (201), a copper pipe (202) and a cooling channel (203) from outside to inside.