Long and thin piece continuous quenching equipment based on oblique pressing wheel driving

Abstract

The invention discloses long and thin part continuous quenching equipment based on oblique pinch roller driving, which comprises a heat treatment module, a water cooling module, two roller supporting modules and a driving module, the heat treatment module comprises a quenching coil and a tempering coil, the water cooling module is positioned between the high-frequency quenching coil and the tempering coil, and the roller supporting modules are arranged in the water cooling module. The two roller supporting modules are located at the two ends of the heat treatment module respectively, the driving module comprises a feeding driving module and a discharging driving module, the feeding driving module is located above the roller supporting module at the front end of the high-frequency quenching coil, and the discharging driving module is located above the roller supporting module at the rear end of the tempering coil. By optimizing a driving structure, a cooling path and continuous tempering, the technical effects of small quenching deformation, metallographic structure refinement, small stress, high production efficiency and low energy consumption are achieved.

Description

Technical Field

[0001] The present invention relates to the metal heat treatment of slender shaft workpieces, and specifically to a continuous quenching device for slender workpieces driven by an obliquely pressed wheel. Background Art

[0002] During the quenching process of slender shaft workpieces such as transmission shafts and lead screws, they are prone to bending deformation due to uneven heating, difficulty in fixing, and excessive slenderness ratio. In the prior art, most devices use center points for fixation, such as the upper and lower center point clamping structure of patent CN220746024U; or hydraulic support, such as the roller centering mechanism of patent CN200620043443.X, but there are the following problems:

[0003] 1. Complicated clamping: Traditional fixtures require multiple adjustments, blocking the surface of the workpiece and affecting the quenching uniformity.

[0004] 2. Low driving efficiency: Some devices rely on external transmission systems and are difficult to achieve continuous operation. For example, the workpiece transmission system of patent CN200920005936.8 requires the linkage of multiple components.

[0005] 3. Insufficient deformation control: The middle support rollers only provide radial constraints and cannot synchronously solve the problem of axial feeding stability. For example, the middle support in patent CN2934258Y lacks radial constraints on the workpiece feeding, which is likely to cause a large deformation problem after quenching.

[0006] In summary, it is essential to study high-efficiency continuous quenching equipment and processes suitable for slender shaft workpieces. Summary of the Invention

[0007] The purpose of the present invention is to provide a continuous quenching device for slender workpieces driven by an obliquely pressed wheel, which realizes the technical effects of small quenching deformation, refined metallographic structure, small stress, high production efficiency, and low energy consumption by optimizing the driving structure, cooling path, and continuous tempering.

[0008] To achieve the above-mentioned invention purpose, the present invention adopts the following technical solutions:

[0009] A continuous quenching device for slender workpieces driven by an obliquely pressed wheel includes a heat treatment module, a water cooling module, a roller support module, and a driving module. The heat treatment module includes a quenching coil and a tempering coil. The water cooling module is located between the high-frequency quenching coil and the tempering coil. There are two roller support modules, which are respectively located at both ends of the heat treatment module. The driving module includes a feeding driving module and a discharging driving module. The feeding driving module is located above the roller support module at the front end of the high-frequency quenching coil, and the discharging driving module is located above the roller support module at the rear end of the tempering coil.

[0010] Preferably, both the high-frequency quenching coil and the tempering coil are made of copper, and the ratio of the inner diameter of the coil to the outer diameter of the workpiece is 1.2 - 1.5:1.

[0011] Preferably, the water-cooling module includes a cooling ring and a plurality of water inlet pipes. The plurality of water inlet pipes are connected to the cooling ring. The cooling ring includes an adjusting ring and a water inlet ring. The adjusting ring and the water inlet ring are connected by threads. Opposite sides of the adjusting ring and the water inlet ring are respectively provided with an annular groove and an annular slot. The inner side surface of the annular groove is provided with an inclined surface one, and the inner top of the annular slot is provided with an inclined surface two. The inclined surface one and the inclined surface two face each other to form a water outlet channel. The right side of the water inlet ring is provided with a water inlet channel, and the water inlet channel communicates with the annular slot.

[0012] Preferably, the feeding drive module includes an inclined pressing wheel, and the angle between the axis of the inclined pressing wheel and the axis of the workpiece is 10° - 40°.

[0013] Preferably, a U-shaped frame is provided on the outer side of the inclined pressing wheel. A servo motor is fixed on the U-shaped frame. The servo motor is shaft-connected to the inclined pressing wheel. A lead screw module is provided at the rear end of the U-shaped frame, and the U-shaped frame is connected to the lead screw module.

[0014] Preferably, the discharging drive module has the same structure as the feeding drive module, and the angles are the same during use, ensuring that the feeding and discharging speeds are the same.

[0015] Preferably, the roller support module includes an installation platform and a plurality of roller groups that are symmetric left and right.

[0016] Preferably, the roller group includes a bracket and two rollers. The two rollers are fixed on the bracket, and the bracket is fixed on the installation platform by bolts.

[0017] Compared with the prior art, the slender part continuous quenching equipment based on the inclined pressing wheel drive adopting the above technical scheme has the following beneficial effects:

[0018] 1. By adopting the slender part continuous quenching equipment based on the inclined pressing wheel drive of the present invention, there is integrated drive and support. The inclined pressing wheel has both driving and axial limiting functions, simplifying the structure; the roller groups are placed below the workpiece, suitable for workpieces of different lengths.

[0019] 2. High-efficiency continuous operation: The feeding speed is controlled by a servo motor to achieve continuous quenching. At the same time, a tempering device is installed to achieve on-line tempering, reducing one process, saving a large amount of labor, and high-frequency tempering saves a large amount of energy compared with overall tempering.

[0020] 3. Deformation control: The synchronous optimization of high-frequency heating and water spraying cooling enables the bending deformation of the workpiece to be ≤0.1 mm / m, which is better than the traditional process, and the traditional process is generally ≥0.3 mm / m. Description of the Drawings

[0021] Figure 1This is a schematic structural diagram of an embodiment of a continuous quenching device for slender parts driven by an inclined pressing wheel according to the present invention.

[0022] Figure 2 For Figure 1 The enlarged view of part A.

[0023] Figure 3 This is a schematic structural diagram of the feeding drive module.

[0024] Figure 4 This is a schematic structural diagram of the water cooling module.

[0025] Figure 5 This is a schematic internal structural diagram of the water cooling module.

[0026] Figure 6 For Figure 5 The enlarged view of part B.

[0027] Reference numerals: 1, heat treatment module; 11, quenching coil; 12, tempering coil; 2, water cooling module; 21, water inlet pipe; 22, adjusting ring; 221, annular groove; 23, water inlet ring; 231, annular groove; 24, water outlet channel; 3, roller support module; 31, mounting platform; 32, roller group; 33, bracket; 4, feeding drive module; 41, inclined pressing wheel; 42, U-shaped frame; 43, servo motor; 44, lead screw module; 5, discharging drive module. Detailed implementation manners

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] As Figures 1 to 6 shown, a continuous quenching device for slender parts driven by an inclined pressing wheel includes a heat treatment module 1, a water cooling module 2, a roller support module 3 and a drive module. The heat treatment module 1 includes a quenching coil 11 and a tempering coil 12. The water cooling module 2 is located between the high-frequency quenching coil 11 and the tempering coil 12. The tempering coil 12 is arranged behind the quenching coil 11 and the cooling ring to achieve tempering online, refine crystal grains and reduce stress. There are two roller support modules 3, and the two roller support modules 3 are respectively located at both ends of the heat treatment module 1. The drive module includes a feeding drive module 4 and a discharging drive module 5. The feeding drive module 4 is located above the roller support module 3 at the front end of the high-frequency quenching coil 11, and the discharging drive module 5 is located above the roller support module 3 at the rear end of the tempering coil 12.

[0030] The workpiece is placed on the roller support module 3. The feeding drive module 4 drives the workpiece to feed, enters the heat treatment module 1 for quenching, is water-cooled after quenching, and then tempered. After tempering, it is conveyed forward along the roller support module 3 by the discharging drive module 5 and naturally cooled.

[0031] Both the high-frequency quenching coil 11 and the tempering coil 12 are made of copper, with embedded cooling water channels. The ratio of the inner diameter of the coil to the outer diameter of the workpiece is 1.2 - 1.5:1, ensuring that the magnetic field can effectively penetrate to the surface of the workpiece and achieve efficient energy transmission. This improves the quenching uniformity and ensures the hardened layer.

[0032] After the high-frequency quenching coil 11 is energized, it generates a high-frequency magnetic field to heat the surface of the workpiece to the austenitizing temperature (850 - 950 °C); the tempering coil 12 precisely, uniformly, and controllably heats the quenched workpiece to the set medium and low tempering temperature range, and after natural cooling, the quenching stress is eliminated, improving the dimensional stability and service safety of the workpiece.

[0033] The water-cooling module 2 includes a cooling ring and a plurality of water inlet pipes 21. The plurality of water inlet pipes 21 are connected to the cooling ring. The cooling ring includes an adjusting ring 22 and a water inlet ring 23. The adjusting ring 22 and the water inlet ring 23 are connected by threads. Opposite sides of the adjusting ring 22 and the water inlet ring 23 are respectively provided with an annular groove 221 and an annular groove 231. The inner side surface of the annular groove 221 is provided with an inclined surface one, and the inner top of the annular groove 231 is provided with an inclined surface two. The inclined surface one and the inclined surface two face each other to form a water outlet channel 24, and the water spray is distributed annularly. By rotating the adjusting ring 22, the size of the water outlet channel 24 between the adjusting ring 22 and the water inlet ring 23 is controlled, thereby controlling the water spray flow rate; one end of the water outlet channel 24 close to the annular groove 221 and the annular groove 231 is a vertical channel, the inner side of the water outlet channel 24 close to the inner ring is in the advancing direction towards the workpiece, and the cross-section of the water outlet channel 24 gradually decreases from the inside to the outside. When adjusting the size of the water outlet channel 24, the water spray angle can also be adjusted; a water inlet channel is provided on the right side of the water inlet ring 23, and the water inlet channel communicates with the annular groove 231.

[0034] The feeding drive module 4 includes an inclined pressing wheel 41. The angle between the axis of the inclined pressing wheel 41 and the axis of the workpiece is 10° - 40°. When the inclined pressing wheel 41 presses the workpiece and rotates, it drives the workpiece to discharge axially through friction; by adjusting the angle of the inclined pressing wheel 41, the feeding speed can be adjusted to control the quenching duration. When the angle is larger, the forward friction force is larger and the speed is faster.

[0035] A U-shaped frame 42 is provided outside the inclined pressing wheel 41. A servo motor 43 is fixed on the U-shaped frame 42. The servo motor 43 is shaft-connected to the inclined pressing wheel 41. A lead screw module 44 is provided at the rear end of the U-shaped frame 42. The U-shaped frame 42 is connected to the lead screw module 44. The lead screw module 44 can drive the U-shaped frame 42 to move up and down, thereby driving the inclined pressing wheel 41 to move up and down, facilitating the replacement of slender parts of different models, adjusting the pressing force, and preventing slipping. A support platform is provided below the lead screw module 44. The lead screw module 44 is connected to the support platform through bolts and long circular holes. When the angle between the axis of the inclined pressing wheel 41 and the axis of the workpiece needs to be adjusted, the bolts are loosened to adjust the angle.

[0036] The discharging drive module 5 has the same structure as the feeding drive module 4 and the same angle during use, ensuring the same feeding and discharging speeds.

[0037] The roller support module 3 includes an installation platform 31 and multiple symmetrically arranged roller groups 32 on the left and right. The workpiece is placed above the roller groups 32, which is used to carry the workpiece and reduce radial runout. A U-shaped groove is opened at the position of the installation platform 31, which can tilt the roller groups 32 to facilitate providing forward frictional force when the workpiece advances.

[0038] Each roller group 32 includes a bracket 33 and two rollers. The two rollers are fixed on the bracket 33, and the bracket 33 is fixed on the installation platform 31 by bolts. The axis of the cooling ring is basically the same as the central axes of the high-frequency quenching coil 11 and the tempering coil 12, ensuring that long-axis workpieces can be cooled and tempered smoothly after entering the high-frequency quenching coil 11.

[0039] Usage process:

[0040] 1. The workpiece is driven by the oblique pressing wheel 41 of the feeding drive module 4 and rolls forward uniformly along the supporting rollers.

[0041] 2. When passing through the high-frequency quenching coil 11, the surface is rapidly heated to the critical temperature.

[0042] 3. The water cooling module 2 rapidly cools the workpiece to complete quenching.

[0043] 4. Enter the tempering coil 12 to complete tempering online.

[0044] 5. Enter the oblique pressing wheel 41 of the discharging drive module 5 and roll forward uniformly along the supporting rollers.

[0045] 6. Leave the area of the oblique pressing wheel 41, and the blanking is completed by workers or machinery.

[0046] The above is the preferred embodiment of the present invention. For those of ordinary skill in the art, without departing from the principle of the present invention, several variations and improvements can be made, which should also be regarded as the protection scope of the present invention.

Claims

1. A continuous quenching device for slender parts driven by an obliquely pressed wheel, characterized in that, It includes a heat treatment module (1), a water cooling module (2), a roller support module (3) and a drive module. The heat treatment module (1) includes a quenching coil (11) and a tempering coil (12). The water cooling module (2) is located between the high-frequency quenching coil (11) and the tempering coil (12). There are two roller support modules (3), and the two roller support modules (3) are respectively located at both ends of the heat treatment module (1). The drive module includes a feeding drive module (4) and a discharging drive module (5). The feeding drive module (4) is located above the roller support module (3) at the front end of the high-frequency quenching coil (11), and the discharging drive module (5) is located above the roller support module (3) at the rear end of the tempering coil (12).

2. The continuous quenching equipment for slender parts based on the drive of an inclined pressing wheel according to claim 1, characterized in that, Both the high-frequency quenching coil (11) and the tempering coil (12) are made of copper, and the ratio of the inner diameter of the coil to the outer diameter of the workpiece is 1.2 - 1.5:

1.

3. The continuous quenching equipment for slender parts based on the drive of an obliquely pressing wheel according to claim 1, characterized in that, The water cooling module (2) includes a cooling ring and a plurality of water inlet pipes (21). The plurality of water inlet pipes (21) are connected to the cooling ring. The cooling ring includes an adjusting ring (22) and a water inlet ring (23). The adjusting ring (22) and the water inlet ring (23) are connected by threads. Opposite sides of the adjusting ring (22) and the water inlet ring (23) are respectively provided with an annular groove (221) and an annular slot (231). The inner side surface of the annular groove (221) is provided with an inclined surface one, and the inner top of the annular slot (231) is provided with an inclined surface two. The inclined surface one and the inclined surface two face each other to form a water outlet channel (24).

4. The continuous quenching equipment for slender parts based on the drive of an obliquely pressing wheel according to claim 3, wherein A water inlet channel is provided on the right side of the water inlet ring (23), and the water inlet channel communicates with the annular slot (231).

5. The continuous quenching equipment for slender parts based on the drive of an inclined pressing wheel according to any one of claims 1-4, characterized in that, The feeding drive module (4) includes an inclined pressing wheel (41), and the angle between the axis of the inclined pressing wheel (41) and the axis of the workpiece is 10° - 40°.

6. The continuous quenching equipment for slender parts based on the drive of an inclined pressing wheel according to claim 5, characterized in that, A U-shaped frame (42) is provided on the outer side of the inclined pressing wheel (41). A servo motor (43) is fixed on the U-shaped frame (42). The servo motor (43) is shaft-connected to the inclined pressing wheel (41). A lead screw module (44) is provided at the rear end of the U-shaped frame (42), and the U-shaped frame (42) is connected to the lead screw module (44).

7. The continuous quenching equipment for slender parts based on the drive of an inclined pressing wheel according to any one of claims 6, characterized in that The roller support module (3) includes an installation platform (31) and a plurality of roller groups (32) that are symmetrically arranged left and right.

8. The continuous quenching equipment for slender parts based on the drive of an inclined pressing wheel according to claim 7, wherein The roller group (32) includes a bracket (33) and two rollers. The two rollers are fixed on the bracket (33), and the bracket (33) is fixed on the installation platform (31) by bolts.

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