Induction hardening device for cylindrical workpiece

Abstract

The invention provides a cylindrical workpiece induction quenching device which comprises a first clamping mechanism and a second clamping mechanism which are fixed to a rack, arranged in the vertical direction and used for fixing the two ends of a workpiece. The first clamping mechanism and / or the second clamping mechanism can generate axial tension on the workpiece; and the induction heating mechanism is arranged on the rack and used for heating the workpiece. According to the technical scheme, the bending amount of the workpiece can be reduced in the heat treatment process of the workpiece, and therefore the service life of the workpiece is prolonged.

Description

Technical Field

[0001] The present application relates to the field of heat treatment technology, and in particular to an induction hardening device for cylindrical workpieces. Background Art

[0002] Currently, during the induction heat treatment process of cylindrical blanks, the workpiece is supported by a pin against the center holes at both ends, and the workpiece is subjected to axial pressure. As a result, the quenching bending of the processed cylindrical workpiece increases by about 0.15 mm / m, thereby increasing the subsequent straightening process and the straightening time. After multiple manual straightening, the fatigue service life of the cylindrical workpiece will be reduced. Summary of the Invention

[0003] The present application provides an induction hardening device for a cylindrical workpiece, which can reduce the bending amount of the workpiece during the heat treatment process, thereby increasing the service life of the workpiece.

[0004] In order to solve the above technical problems, this application adopts the following technical solutions:

[0005] The present application provides an induction hardening device for a cylindrical workpiece, comprising: a first clamping mechanism and a second clamping mechanism fixed to a frame, the first clamping mechanism and the second clamping mechanism being arranged in a vertical direction, the first clamping mechanism and the second clamping mechanism being used to fix both ends of the workpiece; the first clamping mechanism and / or the second clamping mechanism being capable of generating an axial pulling force on the workpiece; and an induction heating mechanism being arranged on the frame and being used to heat the workpiece.

[0006] As an embodiment, the frame includes a column and a base connected to each other, a sliding mechanism is provided on the column, and the first clamping mechanism is connected to the sliding mechanism.

[0007] As an embodiment, a water spraying device is further provided below the induction heating mechanism, and the water spraying device is connected to the induction heating mechanism, and the water spraying device can spray water on the workpiece.

[0008] As an embodiment, the water spray device includes a water spray ring, a plurality of holes are arranged on the inner side of the water spray ring, a chamber is arranged inside the water spray ring, a water inlet pipeline is arranged on the water spray ring, and the water spray ring is used to spray water on the workpiece passing through.

[0009] As an embodiment, the induction heating mechanism includes a fixing part for fixing the induction coil, the fixing part is arranged above the water spray ring, the fixing part is connected to the water spray ring through a connecting rod, and the connecting rod can adjust the distance between the water spray ring and the fixing part.

[0010] As an embodiment, the induction quenching device further includes at least one first rolling mechanism, which is located below the induction heating mechanism. The first rolling mechanism includes a roller, which can move in a horizontal direction and adhere to the outer surface of the workpiece.

[0011] As an embodiment, the induction quenching device also includes a first cylinder, which is connected to the frame. Two first rolling mechanisms are provided, and both first rolling mechanisms are connected to the first cylinder and are arranged opposite to each other. The first cylinder is used to control the two first rolling mechanisms to move synchronously toward the workpiece.

[0012] As an embodiment, the workpiece is provided with a thread, and the roller is provided with a spiral protrusion adapted to the thread.

[0013] As an embodiment, the induction heating mechanism also includes an induction coil through which the workpiece can pass, and the fixing member includes a connecting portion, the connecting portion is located on the periphery of the induction coil, and the connecting portion is provided with an insulating member toward the induction coil, and the insulating member is fixedly connected to the induction coil.

[0014] As an embodiment, the induction hardening device further includes a drive motor, wherein the drive motor is connected to the first clamping mechanism, and the drive motor can drive the first clamping mechanism to rotate.

[0015] The technical solution of this application has the following beneficial effects:

[0016] The induction quenching device includes a first clamping mechanism and a second clamping mechanism, which are fixed on the frame in the vertical direction. The first clamping mechanism and the second clamping mechanism can respectively fix the two ends of the workpiece; at the same time, after the first clamping mechanism and the second clamping mechanism respectively fix the two ends of the workpiece, the first clamping mechanism and / or the second clamping mechanism can generate axial tension on the workpiece. Compared with the method of fixing the workpiece with a pin in the prior art, the axial pressure generated on the workpiece can be reduced. In this way, when the induction heating mechanism set on the frame heats the workpiece again, the increase in the quenching bending amount can be reduced, thereby reducing the subsequent straightening process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1A schematic structural diagram of an induction quenching device provided in an embodiment of the present application;

[0019] Figure 2 for Figure 1 Schematic diagram of a local enlarged structure;

[0020] Figure 3 Schematic diagram of the structure of the induction quenching device provided in the embodiment of the present application from different perspectives;

[0021] Figure 4 A schematic structural diagram of the induction hardening device provided in an embodiment of the present application from another perspective;

[0022] Figure 5 Schematic diagram of the partial structure of the induction quenching device provided in different embodiments of the present application.

[0023] Icons: 1-first clamping mechanism; 2-second clamping mechanism; 3-frame; 31-column; 32-base; 4-sliding mechanism; 5-water spray ring; 6-induction heating mechanism; 61-fixing part; 611-connecting part; 62-induction coil; 63-induction power supply; 7-first connecting plate; 8-first connecting arm; 9-driving motor; 10-support frame; 11-second connecting arm; 12-second connecting plate; 13-first cylinder; 14-first rolling mechanism; 15-second cylinder; 16-second rolling mechanism; 17-connecting rod; 18-insulating member. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0025] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and should not be understood as indicating or implying relative importance.

[0026] like Figure 1As shown, an embodiment of the present application provides an induction hardening device for a cylindrical workpiece, the induction hardening device comprising a first clamping mechanism 1 and a second clamping mechanism 2, the first clamping mechanism 1 and the second clamping mechanism 2 being fixed on a frame 3 in a vertical direction, the first clamping mechanism 1 and the second clamping mechanism 2 being capable of fixing both ends of the workpiece respectively; at the same time, after the first clamping mechanism 1 and the second clamping mechanism 2 have respectively fixed both ends of the workpiece, the first clamping mechanism 1 and / or the second clamping mechanism 2 can generate an axial pulling force on the workpiece, which can reduce the axial pressure on the workpiece compared to the method of fixing the workpiece with a pin in the prior art, so that when the induction heating mechanism 6 arranged on the frame 3 heats the workpiece again, the increase in the quenching bending amount can be reduced, thereby reducing the subsequent straightening process.

[0027] Optionally, the first clamping mechanism 1 has the same structure as the second clamping mechanism 2. The first clamping mechanism 1 includes a first chuck, which includes a chuck seat and four claws located at one end of the chuck seat. The four claws can be used to clamp one end of the workpiece. The four claws can clamp the workpiece manually or automatically.

[0028] Optionally, in some cases, when the cylindrical workpiece is thick enough, sometimes only one end of the workpiece can be fixed by the first clamping mechanism 1, and the workpiece can generate a pulling force on one end of the first clamping mechanism 1 through its own gravity.

[0029] Optionally, axial tension refers to the tension generated along the axial direction of the workpiece. The second clamping mechanism 2 may fix one end of the workpiece, and the first clamping mechanism 1 may fix the other end of the workpiece, and generate axial tension in a direction away from the second clamping mechanism 2, or the first clamping mechanism 1 may fix one end of the workpiece, and the second clamping mechanism 2 may fix the other end of the workpiece, and generate axial tension in a direction away from the first clamping mechanism 1; or the first clamping mechanism 1 may fix one end of the workpiece, and the second clamping mechanism 2 may fix the other end of the workpiece, and the first clamping mechanism 1 and the second clamping mechanism 2 may respectively generate axial tension in a direction away from each other.

[0030] like Figure 1 and 4 As shown, as an embodiment, the frame 3 includes a column 31 and a base 32 connected to each other, a sliding mechanism 4 is provided on the column 31, the first clamping mechanism 1 is connected to the sliding mechanism 4, and the first clamping mechanism 1 is connected to the column 31 through the sliding mechanism 4, so that after the first clamping mechanism 1 fixes the workpiece, it can slide in the vertical direction through the sliding mechanism 4, thereby generating axial tension on the workpiece; in addition, the distance between the first clamping mechanism 1 and the second clamping mechanism 2 can also be adjusted through the sliding mechanism 4, so that the first clamping mechanism 1 and the second clamping mechanism 2 can clamp workpieces of different lengths to improve the application range of the product.

[0031] Optionally, in some cases, both the first clamping mechanism 1 and the second clamping mechanism 2 can be fixed on the column 31 and controlled separately by two different sets of sliding mechanisms 4, so that axial tension can be generated at both ends of the first clamping mechanism 1 and the second clamping mechanism 2 respectively; of course, it is also possible that only the first clamping mechanism 1 generates an upward pulling force, and the second clamping mechanism 2 fixes one end of the workpiece; or the second clamping mechanism 2 generates a downward pulling force, and the first clamping mechanism 1 fixes one end of the workpiece.

[0032] Optionally, the column 31 is fixed to the base 32 by bolts.

[0033] Optionally, the column 31 is a rectangular structure, and the induction quenching device also includes a first connecting plate 7 and a first connecting arm 8. The sliding mechanism 4 can be a linear guide and a slider, or a ball screw and a nut, etc., wherein the linear guide or the ball screw is fixed on the column 31, and the slider or the nut is connected to the first connecting plate 7, and the first connecting arm 8 connects the first connecting plate 7 to the first chuck respectively, thereby realizing that the sliding mechanism 4 can drive the first chuck to move up and down.

[0034] Optionally, if the second clamping mechanism 2 is also connected to the column 31 via the sliding mechanism 4 , its connection structure is similar to the above and will not be described in detail.

[0035] As an embodiment, a water spraying device is further provided below the induction heating mechanism 6, and the water spraying device is connected to the induction heating mechanism 6. By setting up the water spraying device, after the workpiece is heated by the induction heating mechanism 6, water can be sprayed on the workpiece to quickly cool the workpiece.

[0036] like Figure 1 and 2 As shown, as an embodiment, the water spraying device includes a water spraying ring 5, a plurality of holes are arranged on the inner side of the water spraying ring 5, a chamber is arranged inside the water spraying ring 5, a water inlet pipe is arranged on the water spraying ring 5, and the water spraying ring 5 is used to spray water on the workpiece passing through. By setting the water spraying ring 5, water can be sprayed on the circumference of the workpiece to increase the water spraying area.

[0037] Optionally, the water inlet pipe can be connected to an external water source and enter the chamber in the water spray ring 5 and spray out through the holes.

[0038] Optionally, the water spray ring 5 and the induction heating mechanism 6 are detachably connected, so that water spray rings 5 ​​of different diameters can be replaced.

[0039] like Figure 2As shown, as an embodiment, the induction heating mechanism 6 includes a fixing part 61 for fixing the induction coil 62. The fixing of the fixing part 61 can prevent the induction coil 62 from shaking when the magnetic field changes; the fixing part 61 is arranged above the water spray ring 5, and the fixing part 61 is connected to the water spray ring 5 through a connecting rod 17. The connecting rod 17 can adjust the distance between the water spray ring 5 and the fixing part 61. The distance between the water spray ring 5 and the fixing part 61 is adjusted by the connecting rod 17. Since the fixing part 61 fixes the induction coil 62, the distance between the induction coil 62 and the water spray ring 5 is also adjusted, so that the workpiece can be quickly cooled after heating.

[0040] Optionally, the connecting rod 17 may be a telescopic rod, or its two ends may be respectively threadedly connected to the fixing member 61 and the water spray ring 5, so that the distance between the water spray ring 5 and the fixing member 61 can be adjusted by rotation.

[0041] like Figure 2 and 4 As shown, optionally, the induction heating mechanism 6 also includes an induction power supply 63, and the induction quenching device also includes a support frame 10, which is fixed on one side of the column 31. The induction power supply 63 is placed on the support frame 10, and the support frame 10 is slidably connected to the column 31 through the sliding mechanism 4. The induction power supply 63 is connected to the fixing member 61 through the second connecting arm 11, and the connecting line is connected to the induction coil 62 through the second connecting arm 11 from the position of the induction power supply 63, thereby providing power to the induction coil 62.

[0042] Optionally, the induction power supply 63 converts input industrial-frequency alternating current (AC) into high-frequency or medium-frequency AC. The induction coil 62 is typically wound around a copper tube with good conductivity. The coil's shape and size are designed based on the workpiece's shape and heating requirements. When high-frequency AC current passes through the induction coil 62, an alternating magnetic field is generated around it. When a workpiece is placed within the magnetic field of the induction coil 62, eddy currents are induced, generating heat.

[0043] like Figure 1 and 2 As shown, as an embodiment, the induction quenching device further includes at least one first rolling mechanism 14, which is located below the induction heating mechanism 6. The first rolling mechanism 14 includes a roller, which can move in a horizontal direction and fit to the outer surface of the workpiece. In this way, when the workpiece is heated, the roller rolls on the outer surface of the workpiece, which can refine the surface tissue grains of the workpiece, thereby improving the life of the workpiece.

[0044] Optionally, the first rolling mechanism 14 is located between the water spray ring 5 and the induction coil 62 , that is, after the workpiece is heated, it is first rolled by the roller and then quenched.

[0045] Optionally, the first rolling mechanism 14 includes two rollers, thereby increasing the rolling area of ​​the rollers.

[0046] Optionally, when the roller rolls, the workpiece can be stationary and driven to rotate along the surface of the workpiece; of course, the roller can also be stationary and the workpiece can be driven to rotate.

[0047] like Figure 2 and 3 As shown, as an embodiment, the induction quenching device also includes a first cylinder 13, the first cylinder 13 is connected to the frame 3, and two first rolling mechanisms 14 are provided. The two first rolling mechanisms 14 are both connected to the first cylinder 13 and are arranged relative to each other. The first cylinder 13 is used to control the two first rolling mechanisms 14 to move synchronously toward the workpiece, so that the two first rolling mechanisms 14 can be attached to the surface of the workpiece, and the refinement area is increased to improve efficiency; in addition, the two first rolling mechanisms 14 can also clamp and fix the workpiece to improve stability.

[0048] like Figure 3 As shown, optionally, a second connecting plate 12 is further provided on the support frame 10, and the second connecting arm 11 passes through the second connecting arm 11. The induction quenching device also includes a second cylinder 15, which is connected to the first cylinder 13 and can drive the first cylinder 13 to move perpendicular to the moving direction of the first rolling mechanism 14, so that the first cylinder 13 can move toward or away from the workpiece. When the first cylinder 13 approaches the workpiece, the first cylinder 13 drives the two first rolling mechanisms 14 to move relative to each other.

[0049] Optionally, the second connecting plate 12 and the second cylinder 15 may also be connected via a sliding mechanism 4 , so that the position of the first rolling mechanism 14 can be adjusted.

[0050] like Figure 2 As shown, optionally, two second rolling mechanisms 16 are further provided near the second clamping mechanism 2. The second rolling mechanism 16 has the same structure as the first rolling mechanism 14. The two second rolling mechanisms 16 can move relative to each other and are used to fix one end of the workpiece. In this way, when the diameter of the workpiece is large enough, axial tension can be generated by its own gravity, and the second rolling mechanism 16 can play a role of clamping and fixing.

[0051] Optionally, the second clamping mechanism 2 can be fixed to the base 32 by a third cylinder and a fourth cylinder, wherein the connection structure and working mode of the third cylinder and the fourth cylinder are respectively the same as those of the first cylinder 13 and the second cylinder 15.

[0052] Optionally, the first rolling mechanism 14 further includes a connector for connecting the roller, which is detachably connected to the first cylinder 13. This facilitates replacement of the first rolling mechanism 14 with different specifications to accommodate different workpieces. For example, if the workpiece is a lead screw, since the lead screw has an external thread on its outer surface, the roller can be replaced with a rolling member with a spiral protrusion that can adapt to the external thread of the lead screw, thereby refining the microstructure of the threaded surface of the lead screw.

[0053] like Figure 5 As shown, as an embodiment, a thread is provided on the workpiece, that is, the workpiece being processed is a lead screw, and a spiral protrusion adapted to the thread is provided on the roller. The spiral protrusion on the roller is adapted to the thread on the workpiece, which can further refine the microstructure grains on the surface of the lead screw roller, thereby improving the life of the workpiece.

[0054] like Figure 3 As shown, as an embodiment, the induction heating mechanism 6 also includes an induction coil 62 through which the workpiece can pass, and the fixing member 61 includes a connecting portion 611, which is located at the outer periphery of the induction coil 62. The connecting portion 611 is provided with an insulating member 18 toward the induction coil 62, and the insulating member 18 is fixedly connected to the induction coil 62. By connecting the induction coil 62 through the insulating member 18, a short circuit of the induction coil 62 can be avoided. At the same time, the connecting portion 611 can also fix the induction coil 62.

[0055] Optionally, the insulating member 18 and the induction coil 62 may be glued or connected by a fixing member 61 .

[0056] Optionally, the insulating member 18 may be made of glass fiber, nylon, etc.

[0057] like Figure 3 As shown, as an embodiment, the induction quenching device also includes a drive motor 9, which is connected to the first clamping mechanism 1. The drive motor 9 can drive the first clamping mechanism 1 to rotate, thereby causing the workpiece to rotate together. Under the rolling pressure of the first rolling mechanism 14, the surface grains of the workpiece are refined, thereby improving the life of the workpiece.

[0058] Optionally, the driving motor 9 passes through one end of the first connecting arm 8 and is connected to the first clamping mechanism 1, thereby being able to drive the workpiece to rotate.

[0059] The above description is merely an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, various modifications and variations of the present application are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

[0060] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

[0061] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

Claims

1. An induction hardening device for cylindrical workpieces, characterized in that: include: A first clamping mechanism and a second clamping mechanism fixed to the frame, the first clamping mechanism and the second clamping mechanism being arranged in a vertical direction and being used to fix both ends of a workpiece; the first clamping mechanism and / or the second clamping mechanism can generate an axial tension on the workpiece; The induction heating mechanism is arranged on the frame and is used for heating the workpiece.

2. The induction hardening device for cylindrical workpieces according to claim 1, characterized in that: The frame includes a column and a base connected to each other, a sliding mechanism is provided on the column, and the first clamping mechanism is connected to the sliding mechanism.

3. The induction hardening device for cylindrical workpieces according to claim 1 or 2, characterized in that: A water spraying device is further provided below the induction heating mechanism. The water spraying device is connected to the induction heating mechanism and can spray water on the workpiece.

4. The induction hardening device for cylindrical workpieces according to claim 3, characterized in that: The water spray device includes a water spray ring, a plurality of holes are arranged on the inner side of the water spray ring, a chamber is arranged inside the water spray ring, a water inlet pipeline is arranged on the water spray ring, and the water spray ring is used to spray water on the workpiece passing through.

5. The induction hardening device according to claim 4, characterized in that: The induction heating mechanism includes a fixing part for fixing the induction coil, the fixing part is arranged above the water spray ring, the fixing part and the water spray ring are connected by a connecting rod, and the connecting rod can adjust the distance between the water spray ring and the fixing part.

6. The induction hardening device according to claim 1 or 2, characterized in that: The induction hardening device further includes at least one first rolling mechanism, which is located below the induction heating mechanism. The first rolling mechanism includes a roller, which can move in a horizontal direction and fit against the outer surface of the workpiece.

7. The induction hardening device according to claim 6, characterized in that The induction quenching device also includes a first cylinder, which is connected to the frame. Two first rolling mechanisms are provided, and the two first rolling mechanisms are both connected to the first cylinder and arranged opposite to each other. The first cylinder is used to control the two first rolling mechanisms to move synchronously toward the workpiece.

8. The induction hardening device according to claim 7, characterized in that The workpiece is provided with a thread, and the roller is provided with a spiral protrusion adapted to the thread.

9. The induction hardening device according to claim 5, characterized in that: The induction heating mechanism also includes an induction coil through which the workpiece can pass. The fixing member includes a connecting portion, which is located at the periphery of the induction coil. The connecting portion is provided with an insulating member facing the induction coil, and the insulating member is fixedly connected to the induction coil.

10. The induction hardening device according to claim 6, characterized in that The induction hardening device further includes a drive motor connected to the first clamping mechanism, and the drive motor can drive the first clamping mechanism to rotate.

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