A double-inductor device suitable for induction quenching of right-angle surface cast iron guide rails

Abstract

The present application belongs to the field of heat treatment device, and relates to a double-inductor device suitable for induction quenching of right-angle surface cast iron guide rail. The device comprises a preheating inductor and a quenching inductor, and the preheating inductor is fixedly connected with the quenching inductor. The preheating inductor comprises a preheating inductor connecting row, and 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, a preheating inductor magnet is fixedly arranged on the preheating inductor induction coil, the preheating inductor induction coil comprises a first preheating inductor coil and a second preheating inductor coil, and the first preheating inductor coil and the second preheating inductor coil are connected perpendicularly. The two inductors are used in cooperation, the depth of the hardened layer of the guide rail is increased, and the device is particularly suitable for induction quenching of the position of the right-angle guide rail of the machine tool cast iron.

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 right-angle cast iron guide rails, especially suitable for induction hardening of right-angle positions of cast iron guide rails with high hardness and deep hardened layers. Background Technology

[0002] Guide rails are key components of machine tool feed systems. As machine tools develop towards higher speeds, higher efficiency, and higher precision, higher demands are placed on the precision retention and wear resistance of machine tool guide rails. The hardness and depth of the hardened layer on the guide rail surface are important indicators for improving the wear resistance and performance of the guide rail. Under existing surface hardening conditions, such as flame hardening, electric heating surface hardening, and induction heating surface hardening, it is difficult to meet the requirements for high hardness and deep hardening of the guide rail surface. Especially with the advancement of machine tool manufacturing technology, the integrated manufacturing technology of cast iron guide rails and machine tool beds is increasingly used, which can improve the manufacturing and usage precision of machine tools. However, when the bed and guide rail are manufactured as a single unit, and two adjacent guide rails are distributed at right angles, the heat treatment of the machine tool guide rails becomes very difficult. Existing heat treatment equipment can no longer meet the requirements of quenching adjacent perpendicular machine tool guide rails. Therefore, researching new heat treatment devices for induction hardening of perpendicularly adjacent cast iron machine tool guide rail surfaces is an effective way to complete the heat treatment of guide rails and extend the service life of machine tools. By increasing the depth of the hardened layer and improving the hardness of the guide rail, the wear resistance and durability of machine tool guide rails can be effectively improved. This device can meet the performance requirements of machine tool guide rails and improve the dimensional accuracy and friction and wear resistance of machine tools. Summary of the Invention

[0003] In view of the above-mentioned technical problems, the present invention provides a dual-inductor device suitable for induction hardening of right-angle cast iron guide rails, especially suitable for induction hardening of right-angle positions of machine tool cast iron guide rails with high hardness and deep hardened layers.

[0004] The technical solution of the present invention is as follows:

[0005] A dual-sensor device suitable for induction hardening of right-angle cast iron guide rails includes a preheating inductor 1 and a hardening inductor 3, wherein the preheating inductor 1 and the hardening inductor 3 are fixedly connected.

[0006] The preheating sensor 1 includes a preheating sensor connecting strip 16; preheating sensor water nozzles 14 are provided on both sides of the preheating sensor connecting strip 16; the preheating sensor connecting strip 16 is fixedly connected to the preheating sensor fixing plate 15; the preheating sensor fixing plate 15 is fixedly connected to the preheating sensor bracket 13; a preheating sensor induction coil 11 is fixedly installed on the preheating sensor bracket 13; a preheating sensor magnetic conductor 12 is fixedly installed on the preheating sensor induction coil 11; the preheating sensor induction coil 11 includes a first preheating induction coil 17 and a second preheating induction coil 18, and the first preheating induction coil 17 and the second preheating induction coil 18 are connected perpendicularly to each other.

[0007] Furthermore, the quenching inductor 3 includes a quenching inductor connecting row 4; quenching inductor water nozzles 6 are provided on both sides of the quenching inductor connecting row 4; the quenching inductor connecting row 4 is fixedly connected to the quenching inductor fixing plate 5; the quenching inductor fixing plate 5 is fixedly connected to the quenching inductor bracket 7; a quenching inductor induction coil 10 is fixedly installed on the quenching inductor bracket 7; a quenching inductor magnetic conductor 9 is fixedly installed on the quenching inductor induction coil 10; the quenching inductor induction coil 10 includes a first quenching induction coil 19 and a second quenching induction coil 20, and the first quenching inductor coil 19 and the second quenching inductor coil 20 are connected perpendicularly to each other.

[0008] Furthermore, the preheating inductor magnetic conductor 12 is made of ferrite, and the quenching inductor magnetic conductor 9 is made of silicon steel sheet.

[0009] Furthermore, a water sprayer 8 is provided on the side of the quenching inductor bracket 7 near the quenching inductor coil 10, and a water sprayer inlet 2 is provided on the upper part of the water sprayer 8.

[0010] Furthermore, the distance between the preheating inductor coil 11 and the quenching inductor coil 10 is 12mm-20mm.

[0011] Furthermore, the preheating inductor magnetic conductor 12 is sized to match the preheating inductor inductor coil 11; the quenching inductor magnetic conductor 9 is sized to match the quenching inductor inductor coil 10.

[0012] Furthermore, the water spray nozzles of the water sprayer 8 are spaced 7mm-10mm apart, and the nozzle size is 1.0mm-1.5mm. The water spray nozzles spray water in the opposite direction to the movement of the preheating sensor 1 and the quenching sensor 3, and form an angle of 40°-60° with the quenching surface of the right-angle cast iron guide rail. The water sprayer 8 includes a first water spray panel 21 and a second water spray panel 22, and the first water spray panel 21 and the second water spray panel 22 are connected perpendicularly to each other through a pipe.

[0013] Furthermore, the distance between the preheating inductor 1 and the quenching inductor 3 is 15mm-20mm.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows.

[0015] 1. A dual-inductor device for induction hardening of right-angle cast iron guide rails uses a preheating inductor and a hardening inductor to simultaneously induction heat and harden the two vertical surfaces of the right-angle cast iron guide rails, enabling simultaneous induction heat treatment of the vertical guide rails.

[0016] 2. Right-angle cast iron guide rails require induction hardening for high hardness and deep layer (HRC55 or higher, hardened layer 5mm or higher). Sufficient heating depth within a certain time and rapid cooling are necessary. Due to the low density and poor thermal conductivity of cast iron, as well as the influence of graphite morphology, low-frequency preheating is required 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 without overheating or burning the surface. The quenching inductor is responsible for secondary heating to ensure a certain temperature and uniform temperature within a certain depth range. Combined with the quenching inductor's rapid cooling and auxiliary cooling equipment, the design requirements for high-hardness, deep-layer cast iron guide rail quenching are met.

[0017] 3. With this dual-sensor device, the two vertical surfaces of the guide rail are hardened once, and the hardness can reach between 55HRC and 60HRC. The hardened layer depth on the two surfaces of the guide rail is 5 to 7.5 mm. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the sensor structure.

[0019] Figure 2 This refers to the microstructure from the surface to the core after induction heat treatment of the vertical guide rail.

[0020] Among them, 1. preheating sensor, 2. water inlet of sprayer, 3. quenching sensor, 4. quenching sensor connecting bar, 5. quenching sensor fixing plate, 6. quenching sensor water nozzle, 7. quenching sensor bracket, 8. water sprayer, 9. quenching sensor magnetic conductor, 10. quenching sensor induction coil, 11. preheating sensor induction coil, 12. preheating sensor magnetic conductor, 13. preheating sensor bracket, 14. preheating sensor water nozzle, 15. preheating sensor fixing plate, 16. preheating sensor connecting bar, 17. first preheating induction coil, 18. second preheating induction coil, 19. first quenching induction coil, 20. second quenching induction coil, 21. first water spray panel, 22. second water spray panel. Detailed Implementation

[0021] 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.

[0022] Example 1.

[0023] like Figure 1 As shown, the present invention provides a dual-inductor device suitable for induction hardening of right-angle cast iron guide rails, including a preheating inductor 1 and a hardening inductor 3, wherein the preheating inductor 1 and the hardening inductor 3 are fixedly connected.

[0024] The preheating sensor 1 includes a preheating sensor connecting strip 16; preheating sensor water nozzles 14 are provided on both sides of the preheating sensor connecting strip 16; the preheating sensor water nozzles 14 are connected to inlet and outlet water pipes to circulate water cooling for the preheating sensor induction coil 11; the preheating sensor connecting strip 16 is fixedly connected to the preheating sensor fixing plate 15 by screws; the preheating sensor fixing plate 15 is fixedly connected to the preheating sensor bracket 13 by bending plates and bolts; the preheating sensor induction coil 11 is fixedly mounted on the preheating sensor bracket 13; the preheating sensor induction coil 11 includes a first preheating induction coil 17 and a second preheating induction coil 18, and the first preheating induction coil 17 and the second preheating induction coil 18 are connected perpendicularly to each other. A preheating sensor magnetic conductor 12 is fixedly mounted on the preheating sensor induction coil 11 and is fixedly attached using electrical insulating silicone.

[0025] In this embodiment, the quenching inductor 3 includes a quenching inductor connecting strip 4; quenching inductor water nozzles 6 are provided on both sides of the quenching inductor connecting strip 4; the quenching inductor water nozzles 6 are connected to inlet and outlet water pipes to circulate water cooling for the quenching inductor coil 10; the quenching inductor connecting strip 4 is fixedly connected to the quenching inductor fixing plate 5 by screws; the quenching inductor fixing plate 5 is fixedly connected to the quenching inductor bracket 7 by bending plates and bolts; the quenching inductor coil 10 is fixedly mounted on the quenching inductor bracket 7; the quenching inductor coil 10 includes a first quenching inductor coil 19 and a second quenching inductor coil 20, and the first quenching inductor coil 19 and the second quenching inductor coil 20 are connected perpendicularly to each other. A quenching inductor magnetic conductor 9 is fixedly mounted on the quenching inductor coil 10 and is fixedly attached using electrical insulating silicone; the quenching inductor 3 is connected and fixed to the induction quenching machine tool through the quenching inductor connecting strip 4.

[0026] In this embodiment, the preheating inductor magnetic conductor 12 is made of ferrite, and the quenching inductor magnetic conductor 9 is made of silicon steel sheet.

[0027] In this embodiment, a water sprayer 8 is provided on the side of the quenching sensor bracket 7 near the quenching sensor induction coil 10 as an auxiliary cooling device, and a water sprayer inlet 2 is provided on the upper part of the water sprayer 8.

[0028] In this embodiment, the distance between the preheating inductor coil 11 and the quenching inductor coil 10 is 15mm.

[0029] In this embodiment, the preheating inductor magnetic conductor 12 is sized to match the preheating inductor inductor coil 11; the quenching inductor magnetic conductor 9 is sized to match the quenching inductor inductor coil 10, and the tightness is moderate after installation.

[0030] In this embodiment, the water sprayer 8 is connected to a water pipe via the water sprayer inlet 2 to inject cooling water. The spray nozzles of the water sprayer 8 are 10mm apart, and the nozzle size is 1.0mm. The spray nozzles spray water in the opposite direction to the movement of the preheating inductor 1 and the quenching inductor 3, and form a 45° angle with the quenching surface of the right-angle cast iron guide rail. The water sprayer 8 includes a first spray panel 21 and a second spray panel 22, and the first spray panel 21 and the second spray panel 22 are connected perpendicularly to each other via a pipe. The water sprayer has a mutually perpendicular structure and is used to cool the surface of the vertical quenching guide rail.

[0031] In this embodiment, the distance between the preheating inductor 1 and the quenching inductor 3 is 15mm.

[0032] In use, first, the preheating inductor 1 is fixed to the preheating transformer via bolts through the preheating inductor connecting strip 16. The quenching inductor 3 is connected and fixed to the heating transformer via the quenching inductor connecting strip 4. Then, the cooling water pipe is connected and the screws of the preheating inductor nozzle 14 and the quenching inductor nozzle 6 are tightened. Similarly, the water pipe is connected to the water inlet 2 of the sprayer and the screws are tightened. The distance between the preheating inductor 1 and the quenching inductor 3 is adjusted to a suitable position, and the two inductors are at the same height, and then locked. The distance between the induction coil and the quenching surface is adjusted to 4mm. The coolant and quenching fluid switches in the induction quenching equipment are turned on, and the sprayer 8 starts spraying water with a stable flow, starting the induction quenching of the right-angle cast iron guide rail. The spray nozzle spacing of the sprayer 8 is 10mm, the spray nozzle size is 1.0mm, and the spray nozzles spray water in the opposite direction of the inductor movement, at a 45° angle to the quenching surface. Once the quenching inductor 3 has completely moved away from the quenching surface, stop moving and allow the guide rail to cool until the surface is free of backheating and steam. After cooling is complete, turn off the coolant and quenching fluid switches.

[0033] In Example 1, after quenching with a dual-sensor device, the surface hardness of the guide rail can reach 55-58 HRC, and the hardness of the base part can reach 600 HV1~670 HV1. At the same time, the depth of the hardened layer of the guide rail was measured to be 5.5 mm.

[0034] Observe the depth of the hardened layer and the microstructure, such as Figure 2 As shown. This invention employs a dual-sensor, dual-independent power supply mode to achieve medium-frequency induction hardening of medium and large-sized components such as cast iron guide rails; 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 quenching of a right-angle surface cast iron guide rail, characterised in that: It includes preheating inductor (1) and quenching inductor (3), preheating inductor (1) is fixedly connected with quenching inductor (3); The preheating inductor (1) includes a preheating inductor connecting row (16); The preheating inductor connecting row (16) is provided with preheating inductor water nozzles (14) on both sides; The preheating inductor connecting row (16) is fixedly connected with a preheating inductor fixed plate (15); The preheating inductor fixed plate (15) is fixedly connected with a preheating inductor support (13); The preheating inductor support (13) is fixedly provided with a preheating inductor induction coil (11); The preheating inductor induction coil (11) is fixedly provided with a preheating inductor magnet (12); The preheating inductor induction coil (11) includes a first preheating inductor coil (17) and a second preheating inductor coil (18), and the first preheating inductor coil (17) and the second preheating inductor coil (18) are connected perpendicularly to each other; The quenching inductor (3) includes a quenching inductor connecting row (4); The quenching inductor connecting row (4) is provided with quenching inductor water nozzles (6) on both sides; The quenching inductor connecting row (4) is fixedly connected with a quenching inductor fixed plate (5); The quenching inductor fixed plate (5) is fixedly connected with a quenching inductor support (7); The quenching inductor support (7) is fixedly provided with a quenching inductor induction coil (10); The quenching inductor induction coil (10) is fixedly provided with a quenching inductor magnet (9); The quenching inductor induction coil (10) includes a first quenching inductor coil (19) and a second quenching inductor coil (20), and the first quenching inductor coil (19) and the second quenching inductor coil (20) are connected perpendicularly to each other; The preheating inductor magnet (12) is made of ferrite, and the quenching inductor magnet (9) is made of silicon steel sheet.

2. A double-inductor device suitable for the induction quenching of right-angled surface cast iron guide rails according to claim 1, characterized in that: A water sprayer (8) is arranged on one side of the quenching inductor support (7) close to the quenching inductor induction coil (10), and a water inlet (2) of the water sprayer (8) is arranged on the upper portion of the water sprayer (8).

3. A double-inductor device suitable for the induction quenching of right-angled surface cast iron guide rails according to claim 1, characterized in that: The distance between the preheating inductor induction coil (11) and the quenching inductor induction coil (10) is 12mm-20mm.

4. A double-inductor device suitable for the induction quenching of right-angled surface cast iron guide rails according to claim 1, characterized in that: The preheating inductor magnet (12) is adapted to the size of the preheating inductor induction coil (11); and the quenching inductor magnet (9) is adapted to the size of the quenching inductor induction coil (10).

5. A double-inductor device suitable for the induction quenching of right-angled surface cast iron guide rails according to claim 2, characterized in that: The water holes of the water sprayer (8) are spaced apart by 7mm-10mm, the size of the water holes is 1.0mm-1.5mm, the water holes spray water in the opposite direction of the movement of the preheating inductor (1) and the quenching inductor (3), and the water holes form an angle of 40°-60° with the quenching surface of the right-angle surface cast iron guide rail; the water sprayer (8) includes a first water spraying panel (21) and a second water spraying panel (22), and the first water spraying panel (21) and the second water spraying panel (22) are perpendicular to each other and connected by a pipeline.

6. A dual inductor arrangement suitable for the induction quenching of right angle face cast iron guide rails according to claim 1, characterized in that: The distance between the preheating inductor (1) and the quenching inductor (3) is 15mm-20mm.

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