A double-inductor device suitable for parallel face cast iron guide rail induction quenching

Abstract

The present application belongs to the technical field of heat treatment device, and relates to a double-inductor device suitable for parallel-face cast iron guide rail induction quenching. The device comprises a preheating inductor and a quenching inductor, wherein the preheating inductor is fixedly connected with the quenching inductor; the preheating inductor comprises a preheating inductor connecting row; preheating inductor water nozzles are arranged on both sides of the preheating inductor connecting row; the preheating inductor connecting row is fixedly connected with a preheating inductor fixed plate; the preheating inductor fixed plate is fixedly connected with a preheating inductor support; a preheating inductor induction coil is fixedly arranged on the preheating inductor support; the preheating inductor induction coil is a U-shaped semi-enclosed structure; and a preheating inductor magnetic conductor is fixedly arranged on the preheating inductor induction coil. The two inductors are used in cooperation, the depth of the hardened layer of the guide rail quenching is increased, and the device is particularly suitable for the induction quenching of various parallel-face components with high hardness and deep hardened layer.

Description

Technical Field

[0001] This invention belongs to the technical field of heat treatment equipment, and relates to a dual-inductor device suitable for induction hardening of parallel cast iron guide rails. Background Technology

[0002] Machine tool guideways are crucial working surfaces of machine tools, forming the foundation of the entire machine tool assembly and the basis for its working accuracy. The accuracy and lifespan of machine tool guideways directly impact the machine tool's lifespan and machining quality. The main failure modes of machine tool guideways are wear and scratches on the working surfaces, leading to a loss of straightness and coarsening of surface roughness. For high-precision machine tools, especially those with integrated machine bodies and guideways, some guideways require heat treatment on both the upper and lower parallel surfaces to improve hardness and wear resistance. Therefore, it is necessary to simultaneously induction harden both parallel surfaces of the guideway. However, for high-precision machine tool guideways, the required hardened layer depth is much greater than that of general machine tool guideways, and existing single inductors are no longer sufficient.

[0003] Therefore, a new type of sensor may be needed to perform induction hardening on two parallel planes of a machine tool, thereby increasing the depth of the hardened layer, improving the hardening hardness, and enhancing the heat treatment quality of the guide rail, thus improving the wear resistance and durability of the machine tool guide rail. Summary of the Invention

[0004] In view of the above-mentioned technical problems, the present invention provides a dual-inductor device suitable for induction hardening of parallel cast iron guide rails, which is particularly suitable for induction hardening of guide rail surfaces with high hardness, large hardened layer depth and parallel structure.

[0005] The technical solution of the present invention is as follows:

[0006] A dual-inductor device suitable for induction hardening of parallel-plane cast iron guide rails includes a preheating inductor 1 and a hardening inductor 2, wherein the preheating inductor 1 and the hardening inductor 2 are fixedly connected.

[0007] The preheating sensor 1 includes a preheating sensor connecting strip 15; preheating sensor water nozzles 14 are provided on both sides of the preheating sensor connecting strip 15; the preheating sensor connecting strip 15 is fixedly connected to the preheating sensor fixing plate 13; the preheating sensor fixing plate 13 is fixedly connected to the preheating sensor bracket 12; a preheating sensor induction coil 10 is fixedly installed on the preheating sensor bracket 12; the preheating sensor induction coil has a U-shaped semi-enclosed structure, which can heat the parallel surface of the guide rail in the middle of the enclosure on both sides; a preheating sensor magnetic conductor 11 is fixedly installed on the preheating sensor induction coil 10.

[0008] Furthermore, the quenching inductor 2 includes a quenching inductor connecting row 3; quenching inductor water nozzles 5 are provided on both sides of the quenching inductor connecting row 3; the quenching inductor connecting row 3 is fixedly connected to the quenching inductor fixing plate 4; the quenching inductor fixing plate 4 is fixedly connected to the quenching inductor bracket 16; a quenching inductor induction coil 9 is fixedly installed on the quenching inductor bracket 16; the quenching inductor induction coil has a U-shaped semi-enclosed structure, which can heat the parallel surface of the guide rail in the middle of the enclosure on both sides; a quenching inductor magnetic conductor 8 is fixedly installed on the quenching inductor induction coil 9.

[0009] Furthermore, the preheating inductor magnetic conductor 11 is made of ferrite, and the quenching inductor magnetic conductor 8 is made of silicon steel sheet.

[0010] Furthermore, a first water spray panel 7 is provided on the side of the quenching sensor bracket 16 near the quenching sensor induction coil 9, and the first water spray panel 7 is provided with a first water spray panel inlet 6; a second water spray panel 17 is provided on the other side near the quenching sensor induction coil (9) and parallel to the first water spray panel 7, and the second water spray panel 17 is provided with a second water spray panel inlet 18, and the water spray holes of the first water spray panel 7 and the second water spray panel 17 are arranged opposite to each other.

[0011] Furthermore, the distance between the preheating inductor coil 10 and the quenching inductor coil 9 is 12mm-20mm.

[0012] Furthermore, the preheating inductor magnetic conductor 11 should be compatible with the size of the preheating inductor coil 10; the quenching inductor magnetic conductor 8 should be compatible with the size of the quenching inductor coil 9.

[0013] Furthermore, the water spray nozzles of the water sprayer 7 are spaced 5mm-10mm apart, the nozzle size is 1.0mm-1.5mm, the water spray direction is opposite to the movement direction of the preheating inductor 1 and the quenching inductor 2, and forms an angle of 40°-60° with the quenching surface of the parallel cast iron guide rail.

[0014] Furthermore, the distance between the preheating inductor 1 and the quenching inductor 2 is 15mm-20mm.

[0015] The dual-sensor structure of this invention is suitable for induction hardening of various parallel surface parts, especially for induction hardening of extra-long bed cast iron guide rails.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows.

[0017] 1. A dual-inductor device suitable for induction hardening of parallel-plane cast iron guide rails, which uses dual inductors to induction heat and harden the (upper and lower) parallel surfaces of the guide rail with a parallel-plane structure, thereby achieving simultaneous induction heat treatment of the parallel-plane guide rail.

[0018] 2. For induction hardening of parallel-surface cast iron guide rails, which requires high hardness and deep layer (HRC55 or higher, hardened layer 5mm or higher), sufficient heating depth needs to be achieved within a certain time, followed by rapid cooling (existing single inductors cannot achieve this). Due to the low density, poor thermal conductivity, and graphite morphology of cast iron, this invention first performs low-frequency preheating to achieve deep heat conduction through surface induction heating to reach the quenching temperature. Therefore, the preheating inductor is responsible for low-frequency preheating to ensure sufficient heating depth and prevent the surface temperature from overheating or burning. The quenching inductor is responsible for secondary heating to ensure a certain temperature and uniform temperature within a certain layer depth range. Combined with the quenching inductor's quenching and auxiliary cooling equipment, the design requirements for high hardness and deep layer quenching of cast iron guide rails are ultimately achieved.

[0019] 3. With this dual-sensor device, the two parallel surfaces of the guide rail are quenched once, and the hardness can reach between 55HRC and 60HRC. The hardened layer depth on the upper and lower surfaces of the guide rail is 5 to 7.5 mm. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the sensor structure.

[0021] Figure 2 This is a schematic diagram of the machine tool guideway structure.

[0022] Among them, 1. preheating sensor, 2. quenching sensor, 3. quenching sensor connecting row, 4. quenching sensor fixing plate, 5. quenching sensor water nozzle, 6. first water spray panel inlet, 7. first water spray panel, 8. quenching sensor magnetic conductor, 9. quenching sensor induction coil, 10. preheating sensor induction coil, 11. preheating sensor magnetic conductor, 12. preheating sensor bracket, 13. preheating sensor fixing plate, 14. preheating sensor water nozzle, 15. preheating sensor connecting row, 16. quenching sensor bracket, 17. second water spray panel, 18. second water spray panel inlet. Detailed Implementation

[0023] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of the present invention. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0024] Example 1.

[0025] like Figure 1 As shown, the present invention provides a dual-inductor device suitable for induction hardening of parallel cast iron guide rails, including a preheating inductor 1 and a hardening inductor 2, wherein the preheating inductor 1 and the hardening inductor 2 are fixedly connected; the fixed connection helps to ensure the relative stability between the preheating inductor and the hardening inductor.

[0026] The preheating sensor 1 includes a preheating sensor connecting strip 15; preheating sensor water nozzles 14 are provided on both sides of the preheating sensor connecting strip 15; the preheating sensor connecting strip 15 is fixedly connected to the preheating sensor fixing plate 13; the preheating sensor fixing plate 13 is fixedly connected to the preheating sensor bracket 12; a preheating sensor induction coil 10 is fixedly mounted on the preheating sensor bracket 12; a preheating sensor magnetic conductor 11 is fixedly mounted on the preheating sensor induction coil 10. The preheating sensor induction coil 10 has a U-shaped semi-enclosed structure, which can heat the parallel surface of the guide rail in the middle of the enclosure on both sides.

[0027] Furthermore, the quenching inductor 2 includes a quenching inductor connecting row 3; quenching inductor water nozzles 5 are provided on both sides of the quenching inductor connecting row 3; the quenching inductor connecting row 3 is fixedly connected to the quenching inductor fixing plate 4; the quenching inductor fixing plate 4 is fixedly connected to the quenching inductor bracket 16; a quenching inductor induction coil 9 is fixedly installed on the quenching inductor bracket 16; and a quenching inductor magnetic conductor 8 is fixedly installed on the quenching inductor induction coil 9. The quenching inductor induction coil 9 has a U-shaped semi-enclosed structure, which can heat the parallel surface of the guide rail in the middle of the enclosure on both sides.

[0028] Furthermore, the preheating inductor magnetic conductor 11 is made of ferrite, and the quenching inductor magnetic conductor 8 is made of silicon steel sheet.

[0029] Furthermore, a first water spray panel 7 is provided on the side of the quenching sensor bracket 16 near the quenching sensor induction coil 9, and the first water spray panel 7 is provided with a first water spray panel inlet 6; a second water spray panel 17 is provided on the other side near the quenching sensor induction coil (9) and parallel to the first water spray panel 7, and the second water spray panel 17 is provided with a second water spray panel inlet 18, and the water spray holes of the first water spray panel 7 and the second water spray panel 17 are arranged opposite to each other.

[0030] Furthermore, the distance between the preheating inductor coil 10 and the quenching inductor coil 9 is 18mm.

[0031] Furthermore, the preheating inductor magnetic conductor 11 should be compatible with the size of the preheating inductor coil 10; the quenching inductor magnetic conductor 8 should be compatible with the size of the quenching inductor coil 9.

[0032] Furthermore, the water spray nozzles of the water sprayer 7 are 6mm apart, the nozzle size is 1.0mm, and the spray direction is opposite to the movement direction of the preheating inductor 1 and the quenching inductor 2 and forms a 45° angle with the quenching surface of the parallel cast iron guide rail.

[0033] Furthermore, the distance between the preheating inductor 1 and the quenching inductor 2 is 18mm.

[0034] When using:

[0035] First, fix the preheating inductor 1 to the preheating transformer via bolts using the preheating inductor connecting bus 15. Connect and fix the quenching inductor 2 to the heating transformer via the quenching inductor connecting bus 3. Then connect the cooling water pipes and tighten the screws on the preheating inductor nozzle 14 and the quenching inductor nozzle 5. Similarly, connect the water pipe to the water inlet 6 of the sprayer and tighten the screws. Adjust the distance between the preheating inductor 1 and the quenching inductor 2 to 18mm, ensuring both inductors are at the same height, and then lock them. Adjust the distance between the inductor coil and the quenching surface to 4mm, start the cooling water, and the water sprayer 7 begins spraying water with a stable flow. Begin the process of... Figure 2 The guide rail has a parallel structure, and both its upper and lower surfaces require induction hardening. The water sprayer 7 has a nozzle spacing of 6mm, a nozzle size of 1.0mm, and the nozzles are at a 45° angle to the hardened surface. Once the induction heater 2 has completely moved away from the hardened surface, it stops moving, allowing the guide rail to cool until the surface shows no backheating and no steam. After cooling, the water sprayer 7 is turned off.

[0036] In Example 1, after induction hardening, the surface hardness of the guide rail was between 55HRC and 58HRC, and the hardness of the base material was between 600HV1 and 670HV1. The hardened layer depth on the upper and lower surfaces of the guide rail was measured to be 5.5mm.

[0037] This invention employs dual inductors to achieve medium-frequency induction hardening of medium and large-sized components such as parallel-plane cast iron guide rails. Medium-frequency induction heating has advantages such as convenient energy supply, energy saving, high efficiency, safety, and environmental friendliness. By combining magnetic conductors of different materials, an effective combination of cost, technical difficulty, and hardening effect is achieved. After hardening using this invention, the hardness of the cast iron guide rail increases and the hardened layer deepens.

Claims

1. A double-inductor arrangement suitable for the induction hardening of parallel-faced cast iron guide rails, characterized in that: Including preheating inductor (1) and quenching inductor (2), preheating inductor (1) is fixedly connected with quenching inductor (2); The preheating inductor (1) includes a preheating inductor connecting row (15), and preheating inductor water nozzles (14) are arranged on both sides of the preheating inductor connecting row (15); the preheating inductor connecting row (15) is fixedly connected with a preheating inductor fixed plate (13); the preheating inductor fixed plate (13) is fixedly connected with a preheating inductor support (12); a preheating inductor induction coil (10) is fixedly arranged on the preheating inductor support (12); the preheating inductor induction coil (10) is a U-shaped half-enclosed structure; a preheating inductor magnet (11) is fixedly arranged on the preheating inductor induction coil (10); The quenching inductor (2) includes a quenching inductor connecting row (3), and quenching inductor water nozzles (5) are arranged on both sides of the quenching inductor connecting row (3); the quenching inductor connecting row (3) is fixedly connected with a quenching inductor fixed plate (4); the quenching inductor fixed plate (4) is fixedly connected with a quenching inductor support (16); a quenching inductor induction coil (9) is fixedly arranged on the quenching inductor support (16); the quenching inductor induction coil (9) is a U-shaped half-enclosed structure; a quenching inductor magnet (8) is fixedly arranged on the quenching inductor induction coil (9); The preheating inductor magnet (11) is made of ferrite, and the quenching inductor magnet (8) is made of silicon steel sheet; The distance between the preheating inductor induction coil (10) and the quenching inductor induction coil (9) is 12mm-20mm; The distance between the preheating inductor (1) and the quenching inductor (2) is 15mm-20mm.

2. A double-inductor arrangement suitable for the induction quenching of parallel-faced cast-iron guide rails according to claim 1, characterized in that: A first water spraying panel (7) is arranged on one side of the quenching inductor support (16) close to the quenching inductor induction coil (9), and the first water spraying panel (7) is provided with a first water spraying panel water inlet (6); a second water spraying panel (17) is arranged on the other side of the quenching inductor support (16) close to the quenching inductor induction coil (9) and parallel to the first water spraying panel (7), and the second water spraying panel (17) is provided with a second water spraying panel water inlet (18); and the water spraying holes of the first water spraying panel (7) and the second water spraying panel (17) are oppositely arranged.

3. A double-inductor arrangement suitable for induction quenching of parallel-faced cast-iron guide rails according to claim 1, characterized in that: The preheating inductor magnet (11) should be adapted to the size of the preheating inductor induction coil (10); and the quenching inductor magnet (8) should be adapted to the size of the quenching inductor induction coil (9).

Images