A metal slider raceway induction hardening device

Abstract

This utility model discloses an induction hardening device for metal slider raceways, comprising: a hardening inductor, the sensing part of which is matched with the slider to be processed; a sensing raceway is provided below the hardening inductor, a magnetic conductor for changing the direction of magnetic lines of force is provided on the sensing raceway, and a spray cooling device is arranged at the output end of the sensing raceway. Utilizing induction hardening technology, the metal slider raceway is heated by eddy currents generated by the magnetic field of the induction coil, achieving austenitization of the raceway material. Rapid cooling by the spray device achieves localized hardening of the metal slider raceway, obtaining extremely fine hidden acicular martensite. This eliminates the heat preservation step in the traditional heat treatment process. Using this utility model, the slider raceway can be induction hardened before machining the ball return hole, improving the machining accuracy of the ball return hole and avoiding the deformation caused by pre-heat machining of the ball return hole followed by traditional overall heat treatment.

Description

Technical Field

[0001] This utility model relates to the field of heat treatment technology, and in particular to a metal slider raceway induction hardening device. Background Technology

[0002] Metal sliders, as a crucial component of rolling linear guides, have a single-axis symmetrical structure with multiple blind holes and ball return holes. The wall thickness varies significantly across different parts, and some structures contain sharp corners. During use, the slider raceway must withstand high-frequency alternating contact stress. Depending on the material, traditional heat treatment processes for metal sliders employ either integral quenching or carburizing-quenching. When bearing steel or medium-carbon alloy structural steel is used, integral quenching leads to a loss of toughness in the base material. When low-carbon steel is used, carburizing-quenching can improve the toughness of the base material, but it results in greater deformation, leading to low production efficiency, low finished product yield, and increased production costs. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies, the purpose of this utility model is to provide a metal slider raceway induction hardening device.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A metal slider raceway induction hardening device includes: a hardening inductor, the sensing part of which is matched with the slider to be processed; a sensing raceway is provided below the hardening inductor, a magnetic conductor for changing the direction of magnetic lines of force is provided on the sensing raceway, and a spray cooling device is arranged at the output end of the sensing raceway; the metal slider to be processed processes the raceway hardened layer on the inner wall of the slider through the relative movement of the raceway.

[0006] The quenching sensor has an I-shaped structure, and the metal slider to be processed is engaged in the grooves on both sides of the quenching sensor.

[0007] The upper surface of the quenching inductor is provided with a busbar for connecting to the power load transformer of the quenching machine tool.

[0008] The spray cooling device includes a liquid outlet located directly below the magnetic conductor. Multiple liquid outlet holes are arranged on the liquid outlet, and water-based coolant is connected to the liquid outlet.

[0009] The liquid outlet has a cubic structure, and liquid outlet holes are arranged on all four sides of the cubic structure.

[0010] The quenching inductor or slider is equipped with a direct motion mechanism.

[0011] The direct motion mechanism is a linear motion cylinder.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This invention provides an induction hardening device for metal slider raceways. Utilizing induction hardening technology, eddy currents generated by the magnetic field of an induction coil heat the metal slider raceway, achieving austenitization of the raceway material. Rapid cooling via a spray device enables localized hardening of the metal slider raceway, yielding extremely fine acicular martensite. This eliminates the need for heat preservation in traditional heat treatment processes, offering advantages such as energy saving, environmental friendliness, high efficiency, minimal deformation, and good repeatability. Using this method and device, the ball return holes can be machined after induction hardening of the slider raceway, improving the machining accuracy of the ball return holes and avoiding the deformation caused by pre-heat machining of the ball return holes followed by traditional overall heat treatment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the metal slider raceway induction hardening device of this utility model;

[0015] Figure 2 This is a top view of the metal slider raceway induction hardening device of this invention;

[0016] Figure 3 This is a flowchart of the induction hardening method for slider raceways of this utility model.

[0017] In the figure, 1—quenching inductor; 2—magnetic conductor; 3—water-based coolant; 4—spray cooling device; 5—slider; 6—roller hardened layer; 7—sensing slide; 41—liquid outlet; 42—liquid outlet hole. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0019] like Figure 1 , 2 As shown, this utility model provides a metal slider raceway induction hardening device, including: a hardening inductor 1, the structure of which matches the slider 5 to be processed; the hardening inductor 1 is provided with a sensing slideway 7, the sensing slideway 7 is provided with a magnetic conductor 2 for changing the direction of magnetic lines of force, and a spray cooling device 4 is arranged at the output end of the sensing slideway 7; the metal slider 5 to be processed is processed by the raceway hardening layer 6 on the inner wall of the slider 5 during the movement of the slideway 7.

[0020] Specifically, the quenching inductor 1 has an I-shaped structure, and the metal slider 5 to be processed is engaged in the grooves on both sides of the quenching inductor 1. A busbar is provided on the upper surface of the quenching inductor 1 for connecting to the power load transformer of the quenching machine tool.

[0021] Preferably, the spray cooling device 4 includes a liquid outlet 41 located directly below the magnetic conductor 2. The liquid outlet 41 has multiple outlet holes 42 arranged on its surface. A water-based coolant 3 is connected to the liquid outlet 41. The liquid outlet 41 has a cubic structure, and outlet holes 42 are arranged on all four sides of the cubic structure, which can cool the inner wall of the entire slider 5 from all directions.

[0022] This utility model discloses a dedicated slider raceway quenching induction device. Along the four raceway positions on the slider 5, a magnetic conductor 2 is arranged on the quenching induction device 1 to change the direction of the magnetic lines of force. When the quenching induction device 1 is energized, the magnetic field generated causes an induced current to be generated on the surface of the raceway of the metal slider 5, thereby heating the raceway to a phase transformation temperature of 860℃-880℃. A water-based coolant is introduced into a spray cooling device 3 fixed below the quenching induction device 1 as a quenching medium. The raceway of the slider 5 is cooled through uniformly distributed spray holes on the spray cooling device 4, causing the metal structure on the raceway surface to undergo a martensitic transformation, thus completing the induction quenching of the raceway of the slider 5.

[0023] In this invention, the quenching inductor 1 and the spray cooling device 4 can be placed vertically or horizontally. Therefore, the spray cooling device 4 can be arranged below the sensing slide 7 or on the right side of the sensing slide 7.

[0024] In addition, a direct motion mechanism is provided on the quenching inductor 1 or the slider 5. For example, the direct motion mechanism is a linear motion cylinder.

[0025] like Figure 3 As shown, the working process of this utility model is as follows:

[0026] 1) Select an appropriate frequency induction hardening machine and water-based coolant based on the required hardened layer depth of the slider raceway.

[0027] Specifically, it includes:

[0028] Based on the quenching layer depth of 1-3mm in the slider raceway, the relationship between the current penetration depth of the metal in the 800-900℃ range and the power supply frequency of the induction hardening machine tool, and considering the size of the induction heating area of ​​the slider raceway, the electric power absorbed on the surface of the slider raceway, and the energy consumption caused by the use of a magnetic conductor in the induction hardener, an induction hardening power supply with a current frequency of 10-30kHz and an output power of 150kw-200kw is selected.

[0029] Based on the material of the metal slider and the hardness requirement of 58HRC-63HRC for the raceway, water-based coolant PAG was selected as the cooling medium.

[0030] 2) The slide block is obtained by induction hardening and spray cooling through an induction hardening machine tool;

[0031] Specifically, this includes: designing a dedicated slide raceway quenching inductor and spray cooling device for the structure of slide block 5, with the specific structure as shown in Embodiment 1. The slide block 5 inductor is connected to the induction power supply of the quenching machine tool via a busbar, and the relative movement between the slide block and the quenching inductor is achieved through the mechanical parts of the quenching machine tool. During the induction quenching process of the slide raceway, the slide raceway is first heated by the induction quencher, and then immediately cooled by the spray cooling device using a cooling medium.

[0032] During the induction hardening process of the slider raceway, the spray cooling device 2 is fixed to the hardening inductor 1, such as... Figure 1 As shown, the metal slider 5 maintains an equidistant gap with the quenching inductor 1 and the spray cooling device 2. Figure 2 As shown, the metal slider 5, quenching inductor 1, and spray cooling device 2 can be connected according to... Figure 2 It can be placed vertically as shown, or it can be placed horizontally.

[0033] 3) Place the quenched slide block into a tempering furnace for low-temperature tempering to obtain the finished product.

[0034] The temperature for the low-temperature tempering is 150-200℃, the tempering holding time is 2-4 hours, and the tempering is followed by air cooling.

[0035] This invention utilizes induction hardening technology, heating the metal slider raceway through eddy currents generated by the magnetic field of an induction coil, thereby austenitizing the raceway material. Rapid cooling via a spray device achieves localized hardening of the metal slider raceway, resulting in extremely fine acicular martensite. This eliminates the need for heat preservation in traditional heat treatment processes, offering advantages such as energy saving, environmental friendliness, high efficiency, minimal deformation, and good repeatability, thus improving the contact fatigue performance of the slider.

[0036] It will be apparent to those skilled in the art that the above specific examples are merely preferred embodiments of this utility model. Therefore, any improvements or modifications that those skilled in the art may make to certain parts of this utility model still embody the principles of this utility model and achieve its purpose, and all fall within the scope of protection of this utility model.

Claims

1. A metal slider raceway induction hardening device, characterized in that, include: The quenching inductor (1) has a sensing part structure that matches the raceway of the slider (5) to be processed; the quenching inductor (1) is provided with a sensing slide (7), and a magnetic conductor (2) for changing the direction of the magnetic field lines is provided on the sensing slide (7); a spray cooling device (4) is arranged at the output end of the sensing slide (7); the slider (5) to be processed is processed through the relative movement process of the sensing slide (7) to process the raceway hardened layer (6) on the inner wall of the slider (5).

2. The metal slider raceway induction hardening device according to claim 1, characterized in that, The quenching sensor (1) has an I-shaped structure, and the metal slider (5) to be processed is engaged in the grooves on both sides of the quenching sensor (1).

3. The metal slider raceway induction hardening device according to claim 1 or 2, characterized in that, The upper surface of the quenching inductor (1) is provided with a busbar for connecting the power load transformer of the quenching machine tool.

4. The metal slider raceway induction hardening device according to claim 1 or 2, characterized in that, The spray cooling device (4) includes a liquid outlet (41), which is located directly below the magnetic conductor (2). Multiple liquid outlet holes (42) are arranged on the liquid outlet (41), and water-based coolant (3) is connected to the liquid outlet (41).

5. The metal slider raceway induction hardening device according to claim 4, characterized in that, The liquid outlet (41) has a cubic structure, and liquid outlet holes (42) are arranged on all four sides of the cubic structure.

6. The metal slider raceway induction hardening device according to claim 1, characterized in that, The quenching inductor (1) or slider (5) is provided with a direct motion mechanism.

7. The metal slider raceway induction hardening device according to claim 6, characterized in that, The direct motion mechanism is a linear motion cylinder.

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