Integral induction hardening tool for cylindrical gear shaft

Abstract

The utility model relates to an integral induction quenching tool for a cylindrical gear shaft, which comprises a connector, an insulating spacer, a profiling sensor, a flange plate fastening bolt for connecting a right connecting flange plate with a profiling sensor connecting flange plate, and an insulating spacer fastening bolt for fastening the insulating spacer on the axial center part of the profiling sensor, the two insulating blocks are symmetrically connected to the profiling sensor through profiling sensor connecting bolts, water spraying box water inlet ports are formed in the outer sides of the two semicircular water spraying boxes, a plurality of water spraying holes are formed in the inner sides of the two semicircular water spraying boxes in an arc-shaped angle, and the two semicircular water spraying boxes are symmetrically fastened to arc sections of the insulating blocks through semicircular water spraying box connecting bolts. The machine tool left centre and the machine tool right centre are used for clamping two ends of the cylindrical gear shaft workpiece. The device is uniform in induction heating, high in heating efficiency, uniform in cooling, good in quenching quality and small in part deformation, the cost is reduced, the production efficiency is improved, and the labor intensity is reduced. The device can be widely applied to the cylindrical gear shaft heat treatment process.

Description

Technical Field

[0001] The invention relates to an integral induction quenching tool for a cylindrical gear shaft, which can be widely used in a heat treatment process of the cylindrical gear shaft. Background Art

[0002] The existing quenching treatment of cylindrical gear shafts generally adopts traditional scanning profiling sensor quenching treatment. This heat treatment method has the defects of different heating depths at different diameters, different depths of hardened layers, uneven hardness, quenching blind areas, and soft spots. The workpiece heat treatment quality is poor, the scrap rate is high, the waste is serious, and the cost is high. Summary of the invention

[0003] The object of the present invention is to provide an integral induction quenching tool for cylindrical gear shafts which has uniform induction heating, high heating efficiency, uniform cooling, good quenching quality, small part deformation, reduced costs, improved production efficiency, and reduced labor intensity.

[0004] In order to achieve the above-mentioned purpose, the integral induction quenching tooling of the cylindrical gear shaft of the present invention comprises a connector with a left connecting flange and a right connecting flange at both ends, a connector water inlet interface and a connector water outlet interface in the middle, an insulating gasket extending to the profiling sensor is arranged along the axial center of the connector, a profiling sensor connecting flange is arranged at the end, a profiling sensor water inlet and a profiling sensor water outlet are arranged in the middle, a profiling sensor with a conductive magnetic body is arranged at the outer circle of the cylindrical gear shaft workpiece, a flange fastening bolt connecting the right connecting flange and the profiling sensor connecting flange together, an insulating gasket fastening bolt fastening the insulating gasket to the axial center of the profiling sensor, two insulating blocks symmetrically connected to the profiling sensor by the profiling sensor connecting bolts, a water spray box water inlet interface is arranged on the outside, a plurality of water spray holes are arranged on the inner side at an arc angle, and two semicircular water spray boxes are symmetrically fastened to the arc section of the insulating block by semicircular water spray box connecting bolts, which are used to clamp the left top and right top of the machine tool at both ends of the cylindrical gear shaft workpiece.

[0005] The cylindrical gear shaft integral induction quenching tool of the present invention, the semicircular water spray box has an inner side provided with an arc angle of 120 degrees.

[0006] The cylindrical gear shaft integral induction hardening tool of the present invention, the profiling sensor is completely designed according to the specific structure of the cylindrical gear shaft workpiece, and its shape is consistent with the outer structure of the cylindrical gear shaft workpiece.

[0007] The working principle of the overall induction quenching tooling for the cylindrical gear shaft of the present invention is as follows: the electromagnetic induction and skin effect principles are adopted, the profile sensor is completely designed in accordance with the overall structure of the cylindrical gear shaft, the shape is consistent with the part structure, and the overall heating and synchronous quenching of different parts are achieved according to the quenching area of ​​the shaft. An induced current is generated on the outer surface of the cylindrical gear shaft workpiece, and the induced current forms a loop inside the workpiece, i.e., an eddy current. This eddy current converts electrical energy into thermal energy and quickly heats the workpiece. The cylindrical gear shaft is inductively heated as a whole by a profile sensor, and a semicircular water spray box cooling device is used for synchronous spray cooling, so as to achieve synchronous induction quenching of a cylindrical gear shaft with a complex structure.

[0008] In the integral induction quenching tooling for the cylindrical gear shaft of the present invention, the two poles of the profiling sensor are separated by an insulating gasket and fixed by bolts, so that the position of the profiling sensor can be fixed; in addition, two water inlet pipes are added in the middle of the profiling sensor to ensure the cooling of the profiling sensor itself.

[0009] The connector of the integral induction hardening tooling for cylindrical gear shaft of the present invention is a component used to connect the profiling inductor and the transformer. The profiling inductor is designed in accordance with the overall structure of the cylindrical gear shaft and is welded at right angles. The induction converging part uses an insulating gasket to separate the positive and negative poles, and is fixed with bolts. In addition, a magnetic conductor is added to the corresponding gear shaft fillet, spline, and end face transition to enhance the induction heating efficiency, so that the distribution of the induction heating current is highly matched with the complex structure of the gear shaft, and the overall heating of different parts is achieved at the same time. Therefore, the induction heating is uniform and the heating efficiency is high.

[0010] The cylindrical gear shaft integral induction quenching tool of the present invention adopts a semicircular water spray box cooling device. According to the diameter of the cylindrical gear shaft and the quenching area requirements, a semicircular cooling structure is designed inside the two semicircular water spray boxes. The two semicircular cooling structures constitute an integral cooling jacket. The inner side of the integral cooling jacket has symmetrical and evenly distributed small holes, and the spray angle is 135°. The integral cooling jacket sprays quenching liquid, which can cover the entire gear shaft surface to form 360°. When the shaft rotates at 300r / min, the purpose of consistent cooling speed and uniform cooling can be achieved everywhere. The defects of uneven cooling and quenching soft spots caused by traditional scanning mobile heating and cooling are avoided.

[0011] The cylindrical gear shaft integral induction quenching tool of the present invention adopts an integral synchronous induction quenching tool, and the induction heating of the profile sensor can fully meet the special structures of different cylindrical gear shafts, realize one-time synchronous heating, and uniform temperature at all locations. Equipped with synchronous integral quenching, the hardened layer and surface hardness of the shaft are guaranteed to be consistent and stable, and the drawbacks of insufficient heating and quenching soft spots in traditional scanning profile sensor quenching are completely overcome, especially ensuring effective quenching of weak links at steps and arc corners. In addition, setting the spray cooling time can also avoid the cracking tendency of the gear shaft steps and spline special parts, ensure the quenching quality of the product, and improve the ultimate service life of the gear shaft. Therefore, the quenching quality is good.

[0012] The cylindrical gear shaft integral induction quenching tool of the present invention adopts an integral synchronous induction heating method to ensure the stability of the induced current, synchronous temperature rise, and synchronous integral quenching after heating to ensure uniform cooling, effectively reducing the quenching deformation of the gear shaft. Therefore, the deformation of the parts is small, the straightening process is omitted, and the cost is reduced.

[0013] Compared with the traditional scanning mobile heating quenching, the cylindrical gear shaft integral induction quenching tool of the present invention adopts an integral synchronous induction quenching tool. On the basis of realizing the integral synchronous heating and synchronous quenching of the cylindrical gear shaft, the equipment investment is reduced, which not only saves the time of switching the profiling sensor, but also greatly shortens the heating and cooling time of a single piece and the number of tempering times, thereby improving production efficiency and reducing labor intensity.

[0014] In summary, the integral induction quenching tooling for the cylindrical gear shaft of the present invention has uniform induction heating, high heating efficiency, uniform cooling, good quenching quality, small deformation of parts, reduced costs, improved production efficiency, and reduced labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments thereof.

[0016] Figure 1 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 yes Figure 1 AA section view;

[0018] Figure 3 yes Figure 1 Schematic diagram of the profiling sensor structure;

[0019] Figure 4 yes Figure 3 Right view in;

[0020] Figure 5 yes Figure 1 Schematic diagram of the semicircular water spray box structure;

[0021] Figure 6 yes Figure 5 Bottom view of . DETAILED DESCRIPTION

[0022] exist Figure 1 to Figure 6 In the invention, the cylindrical gear shaft integral induction quenching tool comprises a connector 1 with a left connecting flange 1-1 and a right connecting flange 1-2 at both ends, a connector water inlet interface 1-3 and a connector water outlet interface 1-4 in the middle, an insulating gasket 2 extending to the profiling sensor is provided along the axial center of the connector, a profiling sensor connecting flange 3-1 is provided at the end, a profiling sensor water inlet 3-2 and a profiling sensor water outlet 3-3 are provided in the middle, and a profiling sensor 3 with a magnetic conductor 3-4 is provided at the outer circumference of the cylindrical gear shaft workpiece 10, and the right connecting flange is connected to the profiling sensor 3-1. The flange fastening bolts 4 connect the disk and the profiling sensor connecting flange, the insulating gasket fastening bolts 5 fasten the insulating gasket to the axial center part of the profiling sensor, the two insulating blocks 6 symmetrically connected to the profiling sensor through the profiling sensor connecting bolts 11, a water spray box water inlet interface a is provided on the outside, and a plurality of water spray holes b are provided on the inner side at an arc angle, and two semicircular water spray boxes 7 are symmetrically fastened to the arc section of the insulating block through semicircular water spray box connecting bolts 12, which are used to clamp the machine tool left center 8 and the machine tool right center 9 at both ends of the cylindrical gear shaft workpiece.

[0023] The cylindrical gear shaft integral induction quenching tool of the present invention, the semicircular water spray box has an inner side provided with an arc angle of 120 degrees.

[0024] The cylindrical gear shaft integral induction hardening tool of the present invention, the profiling sensor is completely designed according to the specific structure of the cylindrical gear shaft workpiece, and its shape is consistent with the outer structure of the cylindrical gear shaft workpiece.

[0025] The above-mentioned tooling for integral induction hardening of cylindrical gear shaft of the present invention is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modify the technical contents disclosed above into equivalent embodiments with equivalent changes without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent replacement and improvement made to the above embodiments without departing from the content of the technical solution of the present invention, according to the technical essence of the present invention, within the spirit and principles of the present invention, still fall within the protection scope of the technical solution of the present invention.

Claims

1. A cylindrical gear shaft integral induction hardening tool, characterized in that: It includes a connector with a left connecting flange and a right connecting flange at both ends, a connector water inlet interface and a connector water outlet interface in the middle, an insulating gasket extending to the profiling sensor along the axial center of the connector, a profiling sensor connecting flange at the end, a profiling sensor water inlet and a profiling sensor water outlet in the middle, a profiling sensor with a magnetic conductor at the outer circle of the cylindrical gear shaft workpiece, flange fastening bolts connecting the right connecting flange and the profiling sensor connecting flange, insulating gasket fastening bolts fastening the insulating gasket to the axial center of the profiling sensor, two insulating blocks symmetrically connected to the profiling sensor through the profiling sensor connecting bolts, a water spray box water inlet interface on the outside, a plurality of water spray holes on the inner side at an arc angle, and two semicircular water spray boxes symmetrically fastened to the arc section of the insulating block through semicircular water spray box connecting bolts, which are used to clamp the left top and right top of the machine tool at both ends of the cylindrical gear shaft workpiece.

2. The cylindrical gear shaft integral induction hardening tooling according to claim 1, characterized in that: The inner side of the semicircular water spray box is provided with an arc angle of 120°.

3. The cylindrical gear shaft integral induction hardening tooling according to claim 1, characterized in that: The profiling sensor is completely designed according to the specific structure of the cylindrical gear shaft workpiece, and its shape is consistent with the outer structure of the cylindrical gear shaft workpiece.

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