Coil for induction hardening of piston rod
By adopting a single-turn double-winding coil structure and copper design in the induction quenching of piston rods of automobile shock absorbers, the problem of excessively long induction length of the double-turn coil is solved, achieving a more concentrated and efficient quenching process, shortening the quenching transition Area length.
Patent Information
- Application Number
- CN202420957060.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-05-07
AI Technical Summary
During induction quenching of existing automobile shock absorber piston rods, the induction length of the double-turn coil is too long, resulting in a long transition zone length of the quenching and affecting processing efficiency.
It adopts a single-turn double-winding coil structure, the sensor outer coil is coaxially idled outside the inner coil, and the cooling water supply and discharge pipe is designed as a hollow cylinder, with a material of copper, ensuring concentrated flow and effective cooling of current.
The length of the piston rod quenching transition zone is shortened, the induction zone is more concentrated, the heating efficiency and electromagnetic effect are improved, and the coil is not easily burned.
Smart Images
Figure CN222294120U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile shock absorber piston rod processing, in particular to a coil used for induction quenching of the piston rod. Background Art
[0002] At present, during induction quenching of automobile shock absorber piston rods, the coil used is a double-turn coil, which has a long induction length. Since the automobile shock absorber piston rod moves very fast along the axial direction, the quenching transition zone required for induction heating quenching is relatively long. Utility Model Content
[0003] The utility model aims to solve the defects of the current automobile shock absorber piston rod processing technology. A coil used for the induction hardening of the piston rod can shorten the length of the quenching transition zone of the piston rod and make the induction area of the piston rod quenching processing more concentrated.
[0004] The technical solution provided by the utility model is:
[0005] A coil for induction hardening of a piston rod, comprising:
[0006] The coil inside the inductor is a circular ring structure with a gap;
[0007] The outer coil of the inductor is a circular ring structure with a gap, the outer coil of the inductor is coaxially sleeved on the outer side of the inner coil of the inductor, and the outer coil of the inductor is flush with the inner coil of the inductor, and one end of the outer coil of the inductor is connected to one end of the inner coil of the inductor;
[0008] A cooling water supply pipe, which is a hollow cylindrical structure, one end of which is connected to the other end of the coil in the inductor;
[0009] The cooling water discharge pipe is a hollow cylindrical structure, and one end of the cooling water discharge pipe is connected to the other end of the outer coil of the inductor.
[0010] Preferably, the inductor inner coil, the inductor outer coil, the cooling water supply pipe and the cooling water discharge pipe are all hollow square tubes.
[0011] Preferably, the cooling water discharge pipe is flush with the outer coil of the inductor.
[0012] Preferably, the cooling water supply pipe and the cooling water discharge pipe are arranged in parallel.
[0013] Preferably, the end of the cooling water supply pipe connected to the coil inside the inductor is in an arc shape.
[0014] Preferably, after one end of the cooling water supply pipe is bent toward the inner coil of the inductor, it is connected to the side surface of the inner coil of the inductor through a bending component.
[0015] Preferably, the materials used for the inductor inner coil, the inductor outer coil, the cooling water supply pipe and the cooling water discharge pipe are all copper.
[0016] The beneficial effect of the utility model is that the coil for induction quenching of the piston rod provided by the utility model can shorten the length of the quenching transition zone of the automobile shock absorber piston rod, so that the induction area during the quenching process of the automobile shock absorber piston rod is more concentrated. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 The utility model is a schematic diagram of the overall structure of the coil used for induction quenching of the piston rod.
[0018] Figure 2 This is a schematic cross-sectional view of the coil used for induction hardening of a piston rod according to the utility model taken along the AA line.
[0019] Figure 3 The utility model is a schematic diagram of the coil induction quenching process for induction quenching of piston rods. DETAILED DESCRIPTION
[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.
[0021] like Figure 1As shown, the utility model provides a coil for induction hardening of piston rods. The inductor inner coil 120 is a circular ring structure with a notch; the inductor outer coil 110 is a circular ring structure with a notch, the inductor outer coil 110 is coaxially sleeved on the outside of the inductor inner coil 120, the inner side of one end of the notch of the inductor outer coil 110 is connected to the outer side of one end of the notch of the inductor inner coil 120 through a connecting component 121, so that one end of the inductor outer coil 110 is connected to one end of the inductor inner coil 120; the cooling water supply pipe 130 is a hollow cylindrical structure, one end of the cooling water supply pipe 130 is connected to the inductor inner coil 120. After the inductor inner coil 120 is bent, it is connected to the side of the inductor inner coil 120 through the bending component 122, so that one end of the cooling water supply pipe 130 is connected to the other end of the inductor inner coil 120, and the shape of the end of the cooling water supply pipe 130 connected to the inductor inner coil 120 is arc-shaped; the cooling water discharge pipe 140 is a hollow cylindrical structure, one end of the cooling water discharge pipe 140 is connected to the other end of the inductor outer coil 110, and the cooling water discharge pipe 140 is arranged in parallel with the cooling water supply pipe 130. The cooling water supply pipe 130 and the cooling water discharge pipe 140 meet the flow of cooling water, effectively cool the inductor outer coil 110 and the inductor inner coil 120, so that the inductor outer coil 110 and the inductor inner coil 120 are not easy to burn out, and the normal use of the inductor outer coil 110 and the inductor inner coil 120 is ensured.
[0022] like Figure 2 As shown, the utility model provides a coil for induction hardening of piston rods. Cut the entire device along the AA section to obtain Figure 2 Right side cross-sectional view. The inductor outer coil 110, the inductor inner coil 120, the cooling water supply pipe 130 and the cooling water discharge pipe 140 are all hollow square tubes made of copper. The hollow square tubes allow cooling water to flow throughout the coils. The inductor outer coil 110 is flush with the inductor inner coil 120 and the cooling water discharge pipe 140, so that the inductor outer coil 110 and the inductor inner coil 120 are in a single-turn double-winding manner.
[0023] like Figure 3As shown, the utility model provides a coil for induction quenching of a piston rod. The automobile shock absorber piston rod first enters the inductor outer coil 110 and the inductor inner coil 120 for induction heating treatment. When the automobile shock absorber piston rod is placed in the inductor inner coil 120, the inductor outer coil 110 and the inductor inner coil 120 are connected with high-frequency alternating current, and an induced current is generated on the surface of the automobile shock absorber piston rod. This current is distributed on the surface of the automobile shock absorber piston rod. The alternating magnetic field formed in the inductor outer coil 110 and the inductor inner coil 120 induces a closed current, i.e., an eddy current, in the automobile shock absorber piston rod, and the surface of the automobile shock absorber piston rod is quickly heated in the form of an eddy current to reach the quenching temperature, and then the power supply is cut off to complete the heating treatment of the automobile shock absorber piston rod surface; then the automobile shock absorber piston rod is made to enter the water spraying circle 150, and the water spraying circle 150 sprays water on the surface of the automobile shock absorber piston rod, so that the automobile shock absorber piston rod is rapidly cooled down, thereby completing the induction heating quenching process of the automobile shock absorber piston rod.
[0024] When the existing automobile shock absorber piston rod is subjected to induction heating quenching, the coil used is a double-turn coil, that is, the induction coil is wound twice around the forward axis of the automobile shock absorber piston rod, and the induction length of the double-turn coil is long. Since the automobile shock absorber piston rod advances very fast along the axis direction, the length of the quenching transition zone required for induction heating quenching is relatively long. In order to improve this problem in the existing automobile shock absorber piston rod processing technology, the coil for piston rod induction quenching provided by the utility model adopts a single-turn double-winding method, that is, the inductor outer coil 110 is coaxially sleeved on the outside of the inductor inner coil 120 and the inductor outer coil 110 and the inductor inner coil 120 are aligned. The structure of the single-turn double-winding coil enables the current to flow more concentratedly, thereby increasing the current density, enhancing the electromagnetic effect of the coil, and further enhancing the effect of induction heating. Therefore, under the same heating effect, the induction length of the single-turn double-winding coil is less than the induction length of the double-turn coil, which can effectively shorten the length of the quenching transition zone of the automobile shock absorber piston rod, and make the induction area more concentrated during the quenching processing of the automobile shock absorber piston rod.
[0025] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.
Claims
1. A coil for induction hardening of a piston rod, characterized in that: include: The coil inside the inductor is a circular ring structure with a gap; The outer coil of the inductor is a circular ring structure with a gap, the outer coil of the inductor is coaxially sleeved on the outer side of the inner coil of the inductor, and the outer coil of the inductor is flush with the inner coil of the inductor, and one end of the outer coil of the inductor is connected to one end of the inner coil of the inductor; A cooling water supply pipe is a hollow cylindrical structure, one end of which is connected to the other end of the coil in the inductor; The cooling water discharge pipe is a hollow cylindrical structure, and one end of the cooling water discharge pipe is connected to the other end of the outer coil of the inductor.
2. The coil for induction hardening of piston rods according to claim 1, characterized in that: The inner coil of the inductor, the outer coil of the inductor, the cooling water supply pipeline and the cooling water discharge pipeline are all hollow square tubes.
3. The coil for induction hardening of piston rods according to claim 1, characterized in that: The cooling water discharge pipe is flush with the outer coil of the inductor.
4. The coil for induction hardening of piston rods according to claim 1, characterized in that: The cooling water supply pipe is arranged in parallel with the cooling water discharge pipe.
5. The coil for induction hardening of piston rods according to claim 1, characterized in that: The end of the cooling water supply pipe connected to the coil inside the inductor is in an arc shape.
6. The coil for induction hardening of piston rods according to claim 5, characterized in that: After one end of the cooling water supply pipe is bent toward the inner coil of the inductor, it is connected to the side surface of the inner coil of the inductor through a bending component.
7. The coil for induction hardening of piston rods according to claim 1, characterized in that: The materials used for the inner coil of the inductor, the outer coil of the inductor, the cooling water supply pipe and the cooling water discharge pipe are all copper.