Integral quenching heating inductor for spline shaft

Abstract

The utility model discloses an integral quenching heating inductor for a spline shaft, which comprises a quenching barrel, a conductive copper bar and a heating coil, and the quenching barrel consists of two barrel plates which are arranged in bilateral symmetry; the conductive copper bar is arranged outside the quenching barrel; a quenching coil positioning block is arranged on the conductive copper bar; the heating coil is fixed between two barrel plates of the quenching barrel through a quenching coil fixing screw rod; the heating coil consists of an upper annular part, a middle vertical part and a lower annular part; the upper annular part of the heating coil is connected with a bent copper bar of the conductive copper bar; and the middle vertical part of the heating coil is connected with the other bent copper bar of the conductive copper bar. The integral quenching heating inductor for the spline shaft can reduce energy consumption, reduce generation of oxide skin, increase surface cleanliness and quality of quenched workpieces, improve production takt time and process stability, and has the advantages of being convenient to install and position, easy in process adjustment, long in service life and the like.

Description

Technical Field

[0001] The utility model relates to an integral quenching heating inductor for a spline shaft, belonging to the technical field of induction heat treatment devices. Background Art

[0002] The spline shaft is an important component in the transmission machinery. The spline shaft will bear a large load and produce wear during the process of transmitting motion, torsion and bending moment. Therefore, it is necessary to improve its mechanical properties such as strength and toughness through surface heat treatment process. When performing surface heat treatment on spline shafts, scanning induction quenching or integral carburizing quenching and other processes are usually adopted, and finally tempering and other methods are used to improve its mechanical properties. The above-mentioned scanning induction quenching process has a large cycle time, and it is difficult to effectively quench the various steps of the spline shaft; and the integral carburizing quenching not only has high energy consumption and slow cycle time, but also brings problems such as environmental pollution. Utility Model Content

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide an integral quenching heating inductor for a spline shaft, which has the advantages of convenient installation and positioning and easy adjustment, can effectively quench the spline shaft at various locations, reduce the generation of oxide scale, and increase the surface cleanliness and quality of the workpiece after quenching. At the same time, it can also reduce energy consumption, improve production rhythm and process stability, and reduce environmental pollution.

[0004] The technical solution to achieve the above purpose is: a spline shaft integral quenching heating inductor, including a quenching barrel, a conductive copper bar and a heating coil, wherein:

[0005] The quenching barrel is composed of two barrel plates arranged symmetrically on both sides, and each barrel plate is provided with a quenching liquid copper joint;

[0006] The conductive copper bar is arranged outside the quenching barrel, and the conductive copper bar is composed of two bent copper bars arranged side by side, and the two bent copper bars of the conductive copper bar are connected to the positive and negative electrodes of the power supply one by one;

[0007] A quenching coil positioning block is provided on the conductive copper bar;

[0008] The conductive copper bar is provided with a locking bolt, and an insulating epoxy resin bushing is provided between the locking bolt and the conductive copper bar;

[0009] The heating coil is fixed between two barrel plates of the quenching barrel by a quenching coil fixing screw;

[0010] The heating coil is composed of an upper annular portion, a middle vertical portion and a lower annular portion;

[0011] The upper annular portion of the heating coil is connected to a bent copper bar of the conductive copper bar; the middle vertical portion of the heating coil is connected to another bent copper bar of the conductive copper bar;

[0012] The lower annular portion of the heating coil is connected to a coil cooling water copper pipe, and a coil cooling water copper joint is provided on the coil cooling water copper pipe;

[0013] A magnetic conductor is installed on the middle vertical part of the heating coil;

[0014] The opening between the two barrel plates of the quenching barrel is sealed by a nitrogen sealing plate, and a nitrogen inlet joint is arranged on one of the nitrogen sealing plates.

[0015] In the above-mentioned spline shaft integral quenching heating inductor, the magnetic conductor is fixed to the middle vertical part of the heating coil by glue.

[0016] In the above-mentioned spline shaft integral quenching heating inductor, a quenching barrel bracket for fixing the quenching barrel is arranged outside the quenching barrel.

[0017] The above-mentioned spline shaft integral quenching heating inductor, wherein the heating coil and each bent copper bar of the conductive copper bar are provided with water flow holes, the coil cooling water copper joint is connected with the water flow holes of the lower annular part of the heating coil through the coil cooling water copper tube, and the water flow holes of the upper annular part and the middle vertical part of the heating coil are respectively connected with the water flow holes in the corresponding bent copper bars through pipes.

[0018] In the above-mentioned spline shaft integral quenching heating inductor, the conductive copper bar and the heating coil are both made of T2 copper; and the coil cooling water copper pipe is made of red copper.

[0019] In the above-mentioned spline shaft integral quenching heating inductor, the nitrogen sealing plate is made of G10 glass fiber plate.

[0020] In the above-mentioned integral quenching heating inductor for a spline shaft, the nitrogen sealing plate is used to form a relatively closed nitrogen cavity in the quenching barrel.

[0021] The above-mentioned spline shaft integral quenching heating inductor, wherein the quenching liquid copper joint is connected to the external quenching liquid hose; the coil cooling water copper joint is connected to the external cooling water; and the nitrogen intake joint is connected to the external intake hose.

[0022] In the above-mentioned spline shaft integral quenching heating inductor, the quenching coil positioning block is used to accurately position the relative position between the quenching coil and the workpiece to be processed.

[0023] The utility model discloses an integral quenching heating inductor for spline shaft, which has the advantages of convenient installation and positioning, and easy adjustment. It can effectively quench various parts of the spline shaft, reduce the generation of oxide scale, and increase the surface cleanliness and quality of the workpiece after quenching. At the same time, it can also reduce energy consumption, improve production rhythm and process stability, and reduce environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a three-dimensional structural diagram (main viewing direction) of the spline shaft integral quenching heating inductor of the utility model;

[0025] Figure 2 It is a three-dimensional structural diagram (side view) of the spline shaft integral quenching heating inductor of the utility model;

[0026] Figure 3 It is a three-dimensional structural diagram (rearward view) of the spline shaft integral quenching heating inductor of the utility model;

[0027] Figure 4 It is a front view of the spline shaft integral quenching heating inductor of the utility model;

[0028] Figure 5 It is a top view of the spline shaft integral quenching heating inductor of the utility model. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the utility model, the specific implementation method thereof is described in detail below in conjunction with the accompanying drawings:

[0030] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The best embodiment of the utility model is a spline shaft integral quenching heating inductor, including a quenching barrel 9, a conductive copper bar 2 and a heating coil 4.

[0031] The quenching barrel 9 is composed of two barrel plates arranged symmetrically on both sides, each of which is provided with a quenching liquid copper joint 11; the quenching liquid copper joint 11 is connected to an external quenching liquid hose. A quenching barrel bracket 10 for fixing the quenching barrel is arranged outside the quenching barrel 9.

[0032] The conductive copper bar 2 is arranged outside the quenching barrel 9. The conductive copper bar 2 is composed of two bent copper bars arranged side by side. The two bent copper bars of the conductive copper bar 2 are connected to the positive and negative electrodes of the power supply in a one-to-one correspondence.

[0033] A quenching coil positioning block 1 is provided on the conductive copper bar 2; the quenching coil positioning block 1 accurately positions the relative position of the sensor and the workpiece to be processed through a fixing nut.

[0034] A locking bolt is arranged on the conductive copper busbar 2, and an insulating epoxy resin bushing 3 is arranged between the locking bolt and the conductive copper busbar; the insulating epoxy resin bushing 3 is used to isolate the locking bolt from the conductive copper busbar 2 to prevent short circuit.

[0035] The heating coil 4 is fixed between the two barrel plates of the quenching barrel 9 by the quenching coil fixing screw 7; the heating coil 4 consists of an upper annular part, a middle vertical part and a lower annular part; the upper annular part of the heating coil 4 is connected to a bent copper bar of the conductive copper bar 2; the middle vertical part of the heating coil 4 is connected to another bent copper bar of the conductive copper bar 2.

[0036] The lower annular portion of the heating coil 4 is connected to the coil cooling water copper tube 6, and the coil cooling water copper tube 6 is provided with a coil cooling water copper joint 5; the coil cooling water copper joint 5 is connected to external cooling water. The heating coil 4 and each bent copper bar of the conductive copper bar 2 are provided with water flow holes, and the coil cooling water copper joint 5 is connected to the water flow holes of the lower annular portion of the heating coil 4 through the coil cooling water copper tube 6, and the water flow holes of the upper annular portion and the middle vertical portion of the heating coil 4 are respectively connected to the water flow holes in the corresponding bent copper bars through pipes.

[0037] A magnetic conductor 8 is installed on the middle vertical part of the heating coil 4. Preferably, the magnetic conductor 8 is fixed on the middle vertical part of the heating coil 4 by glue.

[0038] The opening between the two barrel plates of the quench barrel 9 is blocked by a nitrogen sealing plate 13, and a nitrogen inlet connector 12 is provided on one of the nitrogen sealing plates 13. The nitrogen inlet connector 12 is connected to an external air inlet hose. The nitrogen sealing plate 13 is used to form a relatively closed nitrogen cavity in the quench barrel 9. The nitrogen sealing plate 13 is made of G10 glass fiber board.

[0039] The conductive copper bar 2 and the heating coil 4 are made of T2 copper. The coil cooling water copper pipe 6 is made of red copper.

[0040] The heating coil 4 is divided into an upper annular portion, a middle vertical portion and a lower annular portion, which can heat the upper end area, the middle area and the lower end area of ​​the spline shaft respectively at the same time to improve the production rhythm. A magnetic conductor 8 is installed on the middle vertical portion of the heating coil 4, which can improve the heating efficiency and accurately control the quenching heating at the inner corner of the step. The heating coil 4 and the conductive copper bar 2 are both cooled by water to reduce the temperature of the sensor during production and increase the service life of the coil. The size and position of the magnetic conductor 8 can be adjusted according to the actual heating situation of the workpiece to optimize the induction quenching heating process.

[0041] The utility model of the spline shaft integral quenching heating inductor, when in use, the spline shaft is set at the center position of the heating coil 4, and the upper and lower positions and the end surface distance of the heating coil 4 can be adjusted according to the process. The heating coil 4 is connected to the conductive copper bar 2. A magnetic conductor 8 is provided on the heating coil 4, the purpose is to increase the current density at the inner corner of the step. The coil cooling water copper joint 5, the coil cooling water copper pipe 6, the heating coil 4 and the conductive copper bar 2 are connected as a whole, and the water flow hole is connected.

[0042] The working principle of the spline shaft integral quenching heating inductor of the utility model is as follows: after the heating coil 4 is energized, the upper and lower ends of the spline shaft form annular eddy currents under the action of the annular part of the heating coil 4, and then use the metal's own resistance to generate Joule heat, thereby heating up; the middle step part of the spline shaft generates vertical eddy currents under the action of the middle vertical part of the heating coil 4 and the magnetic conductor 8, and then generates Joule heat. During heating, the spline shaft rotates at a certain speed, and the power output power, frequency and heating time of the power supply are controlled at the same time, so that the required quenching area reaches the quenching temperature, and then the heating is stopped and quenching is performed, so that the parts meet the quenching process requirements.

[0043] To sum up, the spline shaft integral quenching heating sensor of the utility model has the advantages of convenient installation and positioning, and easy adjustment. It can effectively quench the spline shaft at various locations, reduce the generation of oxide scale, and increase the surface cleanliness and quality of the workpiece after quenching. At the same time, it can also reduce energy consumption, improve production rhythm and process stability, and reduce environmental pollution.

[0044] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A spline shaft integral quenching heating inductor, characterized in that: It includes a quenching barrel, a conductive copper bar and a heating coil, wherein: The quenching barrel is composed of two barrel plates arranged symmetrically on both sides, and each barrel plate is provided with a quenching liquid copper joint; The conductive copper bar is arranged outside the quenching barrel, and the conductive copper bar is composed of two bent copper bars arranged side by side, and the two bent copper bars of the conductive copper bar are connected to the positive and negative electrodes of the power supply one by one; A quenching coil positioning block is provided on the conductive copper bar; The conductive copper bar is provided with a locking bolt, and an insulating epoxy resin bushing is provided between the locking bolt and the conductive copper bar; The heating coil is fixed between two barrel plates of the quenching barrel by a quenching coil fixing screw; The heating coil is composed of an upper annular portion, a middle vertical portion and a lower annular portion; The upper annular portion of the heating coil is connected to a bent copper bar of the conductive copper bar; the middle vertical portion of the heating coil is connected to another bent copper bar of the conductive copper bar; The lower annular portion of the heating coil is connected to a coil cooling water copper pipe, and a coil cooling water copper joint is provided on the coil cooling water copper pipe; A magnetic conductor is installed on the middle vertical part of the heating coil; The opening between the two barrel plates of the quenching barrel is sealed by a nitrogen sealing plate, and a nitrogen inlet joint is arranged on one of the nitrogen sealing plates.

2. The spline shaft integral quenching heating inductor according to claim 1, characterized in that: The magnetic conductor is fixed on the middle vertical part of the heating coil by glue.

3. The spline shaft integral quenching heating inductor according to claim 1, characterized in that: A quenching barrel bracket for fixing the quenching barrel is arranged outside the quenching barrel.

4. The spline shaft integral quenching heating inductor according to claim 1, characterized in that: The heating coil and each bent copper bar of the conductive copper bar are provided with water circulation holes. The coil cooling water copper joint is connected to the water circulation holes of the lower annular part of the heating coil through the coil cooling water copper tube. The water circulation holes of the upper annular part and the middle vertical part of the heating coil are respectively connected to the water circulation holes in the corresponding bent copper bars through pipes.

5. The spline shaft integral quenching heating inductor according to claim 1, characterized in that: The conductive copper bus and the heating coil are both made of T2 copper; the coil cooling water copper pipe is made of red copper.

6. The spline shaft integral quenching heating inductor according to claim 1, characterized in that: The nitrogen sealing plate is made of G10 glass fiber plate.

7. A spline shaft integral quenching heating inductor according to claim 1 or 6, characterized in that: The nitrogen sealing plate is used to form a relatively closed nitrogen cavity in the quenching barrel.

8. The spline shaft integral quenching heating inductor according to claim 1, characterized in that: The quenching liquid copper joint is connected to an external quenching liquid hose; the coil cooling water copper joint is connected to external cooling water; and the nitrogen inlet joint is connected to an external inlet hose.

9. The spline shaft integral quenching heating inductor according to claim 1, characterized in that: The quenching coil positioning block is used to accurately position the quenching coil relative to the workpiece to be processed.

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