Spring tempering equipment and tempering process thereof

Abstract

The invention relates to the technical field of metal heat treatment, and provides spring tempering equipment and a tempering process thereof. The spring tempering equipment comprises a tempering device, a spring direction recognizing device, a hot pressing device and a transferring device, the tempering device comprises a tempering furnace, a spring feeding mechanism and a spring discharging mechanism, the feeding mechanism comprises a conveying line and a feeding assembly, and the discharging mechanism comprises an in-furnace conveying belt, a discharging conveying belt, a material moving assembly and the like. Specific structures and connection relations of all the devices are limited. Meanwhile, the invention further relates to a spring tempering process. According to the spring tempering device, the spring tempering operation can be efficiently completed, direction recognizing and hot strong pressure treatment can be conducted on springs, the arrangement of all the mechanisms can ensure that the processes of spring conveying, feeding, discharging and the like are conducted in order, and the effect of improving the spring tempering quality and efficiency is achieved.

Description

Technical Field

[0001] This application relates to the technical field of metal heat treatment, and in particular to a spring tempering device and its tempering process. Background Technology

[0002] Tempering is an essential heat treatment process for springs after they have been rolled or bent. Its main purpose is to eliminate internal stress, stabilize dimensions, and improve elasticity and fatigue resistance. After tempering, springs undergo hot compression treatment. While the spring temperature is still above room temperature, it is compressed to a specified height or tightest point using a force exceeding the material's elastic limit, and held for a period of time. This ensures the spring has more stable load characteristics and height under working conditions, preventing loosening during future use.

[0003] In the current processing steps, before the hot pressing process, a spring orientation mechanism is used to adjust the circumferential direction of the springs, identify the helical direction and end face features of the springs, and ensure that all springs enter the hot pressing mold with a uniform and correct orientation.

[0004] Due to factors such as errors in the visual recognition system, physical sensor errors, or abnormal surface conditions of the spring, the spring may still have a certain deviation in orientation after adjustment by the orientation mechanism. In this case, applying heat-pressurization to the spring will subject it to an uneven force with a lateral component, causing the spring coils to bend, resulting in irreversible plastic deformation such as bending of the central axis and non-parallelism of the two end coils, thus failing to meet design requirements. Furthermore, the deformation and uneven stress caused by this condition will alter and destabilize the spring's load characteristics, potentially leading to large performance variations within the same batch of products, failing to meet assembly or functional requirements. Summary of the Invention

[0005] To ensure the accuracy of orientation during spring processing and improve the processing quality of springs, this application provides a spring tempering device and its tempering process.

[0006] On the one hand, this application provides a spring tempering device, which adopts the following technical solution: A spring tempering device, comprising: The tempering device includes a tempering furnace, a spring feeding mechanism, and a spring discharging mechanism. The spring feeding mechanism is used to transport springs into the tempering furnace, and the spring discharging mechanism is used to transport springs out of the tempering furnace. Spring orientation device; A thermal pressure device includes a pressure frame, a pressure assembly, and a rotary orientation assembly. The pressure assembly includes a first drive source, a fixed base and a push base disposed opposite to each other, and the first drive source is used to drive the push base to slide. The rotary orientation assembly includes a torque detector, a rotation source, and a torsion clamp and an alignment cylinder disposed opposite to each other. The torsion clamp is rotatably mounted on the push base, and the rotation source is used to drive the torsion clamp to rotate. The alignment cylinder is mounted on the fixed base, and a calibration key is provided on the inner side wall of the alignment cylinder. The torque detector is used to detect the torque value when the torsion clamp rotates. A transfer device is used to sequentially transfer the spring from the spring discharge mechanism to the spring orientation device and the thermal pressure device.

[0007] By adopting the above technical solution, the tempering device can temper the spring to eliminate internal stress, stabilize dimensions, and improve elasticity and fatigue resistance. The transfer device transfers the tempered spring to the spring orientation recognition device, which can initially adjust the orientation of the spring. The transfer device then transfers the preliminarily corrected spring to the hot pressing device, where the spring is placed between the torsion clamp and the alignment cylinder. The torsion orientation recognition component can detect the torque value when the spring is torsioned. When the spring is rotated so that its end abuts against the correction key, the torque value changes abruptly, the torsion clamp stops rotating, and the spring is further corrected to the preset orientation. The hot pressing device's pressure component can perform hot pressing treatment on the spring after secondary correction, giving the spring more stable load characteristics and height, ensuring that the spring is hot pressed in a uniform and correct direction, and improving the spring processing quality.

[0008] Optionally, the spring feeding mechanism includes a conveyor line and a feeding assembly, the tempering furnace includes a feeding port, and the conveyor line is located on one side of the feeding port; The feeding assembly includes a feeding pusher and a second drive source. The feeding pusher is slidably disposed on the side of the conveyor line away from the tempering furnace, and the second drive source is used to drive the feeding pusher to slide.

[0009] By adopting the above technical solution, after the conveyor line transports the springs to the feed port side, the second drive source drives the feed pusher to slide, which can push the springs on the conveyor line into the tempering furnace, realize the automatic feeding of springs into the tempering furnace, and improve the feeding efficiency and accuracy.

[0010] Optionally, the feed inlet is further provided with an opening and closing component, which includes an opening and closing plate and a driving component. The opening and closing plate is rotatably disposed on one side of the feed inlet, and the driving component is used to drive the opening and closing plate to rotate.

[0011] By adopting the above technical solution, the feed inlet is equipped with a rotatable opening and closing plate and is driven to rotate by a drive component. It can be opened when feeding and closed when not feeding, so as to reduce heat loss in the tempering furnace, improve energy utilization efficiency, and ensure tempering effect and quality.

[0012] Optionally, the spring discharge mechanism includes an in-furnace conveyor belt, a discharge conveyor belt, and a material transfer assembly; the in-furnace conveyor belt is located inside the tempering furnace, and one end of the in-furnace conveyor belt is positioned close to the feed inlet; The discharge conveyor belt is located at the end of the furnace conveyor belt away from the feed inlet, and one end of the discharge conveyor belt extends outside the tempering furnace; The discharge conveyor belt is arranged perpendicular to the furnace conveyor belt, and the material transfer assembly is used to transfer the spring on the furnace conveyor belt to the discharge conveyor belt.

[0013] By adopting the above technical solution, the conveyor belt inside the furnace transports the tempered springs from near the feed inlet to away from the feed inlet. The material transfer component transfers the springs on the conveyor belt inside the furnace to the discharge conveyor belt, which is vertically set and extends to the outside of the tempering furnace at one end. This achieves the orderly transfer of springs from inside the tempering furnace to the outside of the tempering furnace and ensures the smooth discharge of springs after tempering.

[0014] Optionally, the discharge conveyor belt is fitted with an insulation box on the outer side of the tempering furnace. The insulation box has openings on both sides and is connected to the outer wall of the tempering furnace.

[0015] By adopting the above technical solution, the heat preservation box can keep the springs on the discharge conveyor belt warm, prevent the spring temperature from dropping rapidly, and ensure that the springs still have a suitable temperature when entering subsequent processes. This helps to improve the heat treatment effect of the springs, so that the springs have more stable load characteristics and height in the working state, and prevent them from loosening in future use.

[0016] Optionally, the spring orientation device includes an orientation frame, a photoelectric sensing unit, and a correction component and a drive unit disposed on the orientation frame; The correction assembly includes parallel threaded rods and guardrails, with two guardrails spaced apart on the orientation frame, and two threaded rods rotatably disposed between the two guardrails; The photoelectric sensing unit is disposed between the two threaded rods and is used to detect the specified position of the spring and the distance between the photoelectric sensor and the specified position of the spring. The driving unit is used to drive the threaded rods to rotate.

[0017] By adopting the above technical solution, the photoelectric sensing unit in the spring orientation device can detect the designated position of the spring and the distance between the photoelectric sensor and the designated position of the spring, so as to determine the bending direction of the spring. The drive unit drives the threaded rod to rotate. Since the two threaded rods are set parallel between the two guardrails, the rotating threaded rods can drive the spring to rotate. The action of the threaded rods is used to move the spring between the two guardrails and adjust its direction, thereby ensuring the orientation accuracy during the spring processing. This avoids irreversible plastic deformation such as bending of the central axis and non-parallelism of the two end coils during hot pressing due to orientation deviation, improves the processing quality of the spring, and makes the spring have more stable load characteristics and height, meeting the assembly requirements.

[0018] Optionally, the drive unit includes a driving gear, a driven gear, and a third drive source. Each of the threaded rods has a driven gear coaxially fixed on it. The driving gear meshes with both driven gears. The third drive source is used to drive the driving gear to rotate.

[0019] By adopting the above technical solution, the meshing transmission between the driving gear and the driven gear is used, and the driving gear is driven to rotate by the third drive source, thereby driving the two threaded rods in the correction assembly to rotate synchronously, which makes the spring correction process more stable and efficient.

[0020] Optionally, the fixing base includes a fixing bracket and a fixing push rod fixed to one side of the fixing bracket, and the alignment cylinder is connected to one end of the fixing push rod; The alignment cylinder is provided with a plug-in post, which is detachably connected to the fixed push rod; The calibration key is slidably disposed inside the alignment cylinder, and the rotary orientation assembly further includes a locking element for locking the calibration key.

[0021] By adopting the above technical solution, the fixed push rod of the fixed base is connected to the alignment cylinder. A detachable plug-in post is installed inside the alignment cylinder, facilitating the insertion of the spring into the alignment cylinder. The spring and the plug-in post are coaxial, allowing the spring end to smoothly contact the alignment key during the calibration process, thus achieving alignment. The detachable connection makes the plug-in post easy to replace and maintain, allowing for the replacement of suitable plug-in posts according to the processing requirements of different springs. Simultaneously, the alignment key can slide within the alignment cylinder and is locked by a locking mechanism, allowing the position of the alignment key to be adjusted according to the specifications of different springs. This enhances the equipment's adaptability to different springs, ensures the accuracy of orientation during spring processing, and ultimately improves the processing quality of the springs.

[0022] Optionally, the fixed push rod includes a fixed rod segment and a connecting rod segment disposed at one end of the fixed rod segment. One end of the connecting rod segment passes coaxially through the alignment cylinder and is threaded into the insertion post. An adjustment groove is provided on the bottom wall of the alignment cylinder. The calibration key is slidably disposed in the adjustment groove. One end of the calibration key is connected to an adjustment push bar, and one end of the adjustment push bar extends out of the alignment cylinder. A guide plate is fixed on the outer wall of the alignment cylinder, and a guide bar hole is provided on the guide plate. A guide screw is fixed on the adjusting push bar, and the guide screw is slidably disposed in the guide bar hole. The locking component includes a locking nut threadedly connected to one end of the guide screw.

[0023] By adopting the above technical solution, the connecting rod section of the fixed push rod is threadedly connected to the plug-in column, which facilitates the installation and disassembly of the alignment cylinder and the plug-in column; the calibration key slides in the adjustment groove, and its position can be adjusted by adjusting the push bar, guide screw and guide bar hole, and then locked with the locking nut. The position of the calibration key can be flexibly adjusted according to the needs of different springs, thus improving applicability.

[0024] On the other hand, this application provides a spring tempering process, including the following steps: S1, Spring feeding: The spring is placed on the conveyor line of the spring feeding mechanism. The second drive source drives the feeding pusher to push the spring toward the feed port of the tempering furnace. At the same time, the drive unit drives the opening and closing plate to rotate and open the feed port, so that the spring enters the tempering furnace. S2, Tempering treatment: The spring is tempered in a tempering furnace. The tempering furnace heats the spring according to the set temperature and time parameters. The temperature of the tempering furnace is controlled at 390-405℃ and the tempering time ranges from 20 to 30 minutes. S3, Spring Discharge: After tempering, the springs are conveyed to the end of the furnace conveyor belt. The material transfer component transfers the springs to the discharge conveyor belt, and the discharge conveyor belt transports the springs out of the tempering furnace. S4, Initial orientation recognition: The transfer device transfers the spring on the spring discharge mechanism to the spring orientation recognition device. The photoelectric sensing unit detects the designated position of the spring and the distance between the photoelectric sensor and the designated position of the spring. The third drive source drives the drive gear to rotate, which in turn drives the threaded rod to rotate through the driven gear, thus performing an initial correction of the spring's orientation. S5, Secondary orientation and hot pressing treatment: The transfer device transfers the pre-corrected spring to the hot pressing device, and the spring is placed between the torsion clamp and the alignment cylinder. The rotation source is started to drive the torsion clamp to rotate. After the torque detector detects a sudden change in the measured torque value, the torsion clamp stops rotating. The first drive source is started to drive the push seat to slide, and the spring is subjected to hot pressing treatment.

[0025] By adopting the above technical solution, the spring feeding, tempering, and unloading processes, as well as the two orientation checks and hot pressing treatments, are all closely coordinated. The multi-stage orientation checks and corrections effectively ensure the orientation accuracy of the spring during the hot pressing treatment, improve the processing quality of the spring, and reduce the problems of spring deformation and performance instability caused by orientation deviations.

[0026] In summary, this application includes at least one of the following beneficial effects: 1. The furnace conveyor belt, discharge conveyor belt and material transfer assembly of the spring discharge mechanism in this application can efficiently transfer the tempered springs from inside the tempering furnace to outside the tempering furnace, and the heat preservation box outside the discharge conveyor belt can maintain the spring temperature, creating good conditions for subsequent hot pressing treatment. 2. The photoelectric sensing unit of the spring orientation device in this application can detect the designated position of the spring and the distance between the photoelectric sensor and the designated position of the spring, thereby determining the bending direction of the spring. In conjunction with the drive unit to drive the threaded rod to rotate, the spring can be further corrected to ensure that the spring enters the subsequent processing stage in a more accurate direction, thereby improving the overall accuracy of spring processing. 3. The rotary orientation component in the hot pressing device of this application can further correct the spring orientation before the hot pressing process, ensuring the accuracy of the spring orientation and avoiding problems with the spring during the hot pressing process due to orientation deviation; 4. The spring tempering process disclosed in this application involves hot pressing after spring tempering. This process can reduce the spring tempering time by half compared to traditional spring tempering, and can also improve the spring's anti-fading performance by more than double. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the spring tempering device with the feed inlet shown in the embodiments of this application; Figure 2 This is a schematic diagram of the overall structure of the spring tempering device for the heat preservation box in the embodiments of this application; Figure 3 This is a schematic diagram of the spring discharge mechanism in the embodiments of this application; Figure 4 This is a side view of the spring orientation mechanism in the embodiments of this application; Figure 5 This is a side view of the thermal pressure device after partial cross-section in an embodiment of this application; Figure 6 This is a schematic diagram of the equiaxed side structure of the thermal pressure device in the embodiments of this application; Figure 7 This is a partial exploded view of the knob orientation component in an embodiment of this application; Explanation of reference numerals in the attached drawings: 1. Tempering furnace; 11. Feed inlet; 12. Discharge outlet; 13. Opening and closing mechanism; 131. Opening and closing plate; 132. Driving component; 133. Rotating shaft; 134. Mounting bracket; 1. Spring feeding mechanism; 21. Conveyor line; 22. Feeding assembly; 221. Feeding pusher; 222. Second drive source; 223. Connecting bracket; 3. Spring-loaded discharge mechanism; 31. In-furnace conveyor belt; 32. Discharge conveyor belt; 33. Material transfer assembly; 331. Material transfer push plate; 332. Telescopic source; 4. Spring orientation device; 41. Orientation frame; 411. Positioning panel; 4111. Shifting slide; 412. Pressure bearing plate; 413. Support base; 414. Adjusting block; 42. Photoelectric sensing unit; 43. Correction assembly; 431. Threaded rod; 432. Guardrail; 44. Drive unit; 441. Driving gear; 442. Driven gear; 443. Third drive source; 45. Adjustment assembly; 451. Adjusting screw; 452. Drive motor; 5. Thermal pressure device; 51. Pressure frame; 52. 53. First drive source; 54. Fixed base; 55. Fixed bracket; 56. Fixed push rod; 57. Fixed rod segment; 58. Connecting rod segment; 59. Insertion post; 50. Push seat; 51. Rotary orientation assembly; 52. Torque detector; 53. Rotation source; 54. Torque clamp; 555. Alignment cylinder; 556. Adjusting slide; 57. Guide plate; 58. Guide bar hole; 59. Calibration key; 50. Locking nut; 51. Adjusting push bar; 52. Guide screw; 6. Transfer device; 61. Transfer clamp; 7. Insulated box. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1 - Appendix Figure 7 This application will be described in further detail.

[0029] Example 1: Reference Figure 1 and Figure 2The spring tempering device provided in this application includes a tempering device, a spring orientation device 4, a thermal pressure device 5, and a transfer device 6. The tempering device includes a tempering furnace 1, a spring feeding mechanism 2, and a spring discharging mechanism 3. The tempering furnace 1 is equipped with a heating element (not shown in the figure) to heat the interior of the furnace. The heating element can be a resistance wire or a gas burner, etc. A feed inlet 11 is provided at one end of the tempering furnace 1, and a mounting bracket 134 is provided on one side of the feed inlet 11. The mounting bracket 134 is fixedly connected to the tempering furnace 1. An opening and closing component 13 is installed on the mounting bracket 134, which includes an opening and closing plate 131 and a driving component 132. A rotating shaft 133 is fixedly connected to the middle of the opening and closing plate 131, and the rotating shaft 133 is rotatably connected to the mounting bracket 134, causing the opening and closing plate 131 to rotate to one side of the feed inlet 11. The drive component 132 is fixed to one end of the mounting bracket 134. The drive component 132 can be an electric motor or a hydraulic motor. The output shaft of the drive component 132 is coaxially fixed with the rotating shaft 133 on the opening and closing plate 131. Driving the opening and closing plate 131 to rotate can realize the opening and closing of the feed port 11, reducing the heat loss in the tempering furnace 1.

[0030] Reference Figure 1 and Figure 2 The spring feeding mechanism 2 is located on the side of the mounting bracket 134 away from the feed inlet 11. The spring feeding mechanism 2 includes a conveyor line 21 and a feeding assembly 22. The conveyor line 21 is usually a chain conveyor or a belt conveyor. In this embodiment, a chain conveyor is specifically used, and two conveyor lines 21 are arranged in parallel. The feeding assembly 22 includes a feeding pusher 221 and a second drive source 222. A connecting bracket 223 is welded and fixed to the side of the conveyor line 21 away from the tempering furnace 1. The second drive source 222 can be a cylinder or an electric pusher, and two second drive sources 222 are fixedly fixed at intervals on the connecting bracket 223. The telescopic ends of the second drive sources 222 are fixedly connected to the feeding pusher 221. Driven by the second drive source 222, the feeding pusher 221 slides towards the tempering furnace 1, which can push the spring on the conveyor line 21 toward the feed inlet 11 of the tempering furnace 1.

[0031] Reference Figure 2 and Figure 3The spring discharge mechanism 3 includes an in-furnace conveyor belt 31, a discharge conveyor belt 32, and a material transfer assembly 33. The in-furnace conveyor belt 31 is located inside the tempering furnace 1, with one end of the in-furnace conveyor belt 31 positioned close to the feed inlet 11. The discharge conveyor belt 32 is located at the end of the in-furnace conveyor belt 31 furthest from the feed inlet 11 and is perpendicular to the in-furnace conveyor belt 31. A discharge outlet 12 is also provided on the side wall of the tempering furnace 1, and one end of the discharge conveyor belt 32 extends outward after passing through the discharge outlet 12. The in-furnace conveyor belt 31 and the discharge conveyor belt 32 can also be chain conveyors or belt conveyors. The material transfer assembly 33 is located at the end of the in-furnace conveyor belt 31 close to the discharge conveyor belt 32. The material transfer assembly 33 includes a material transfer pusher plate 331 and a telescopic source 332. The material transfer pusher plate 331 is located above the in-furnace conveyor belt, and the telescopic source 332 is fixed to the tempering furnace 1, with the telescopic end of the telescopic source 332 fixedly connected to the material transfer pusher plate 331. The telescopic source 332 can be a cylinder or an electric push rod, etc., and the telescopic ends of the telescopic source 332 are fixedly connected to the material transfer push plate 331. When the spring moves to the end of the conveyor belt 31 in the furnace, the telescopic source 332 is activated to drive the material transfer push plate 331 to move towards the discharge conveyor belt 32, pushing the springs on the conveyor belt 31 in the furnace one by one onto the discharge conveyor belt 32.

[0032] Reference Figure 2 The discharge conveyor belt 32, located outside the tempering furnace 1, is fitted with an insulation box 7. The insulation box 7 has openings on both sides to communicate with the discharge port 12 of the tempering furnace 1, and is fixedly connected to the outer wall of the tempering furnace 1. The insulation box 7 can be made of insulation materials such as rock wool or polyurethane foam to reduce heat loss during the process of the springs being transported out of the tempering furnace 1.

[0033] Reference Figure 2 and Figure 4 The spring orientation device 4 is located at the end of the discharge conveyor belt 32, which allows the spring to be quickly transferred to the spring orientation device 4 after being transported out by the discharge conveyor belt 32. This simplifies the orientation process, saves orientation time, reduces the temperature loss of the spring during transportation, and improves the spring's anti-attenuation performance.

[0034] The spring orientation device 4 includes an orientation frame 41, a photoelectric sensing unit 42, and a correction assembly 43 and a drive unit 44 disposed on the orientation frame 41. The orientation frame 41 includes a positioning panel 411, a pressure bearing plate 412 fixed to one end of the positioning panel 411, and a support base 413 fixed to the bottom of the positioning panel 411. The positioning panel 411 is inclined downwards towards the end away from the discharge conveyor belt 32. The correction assembly 43 includes parallel threaded rods 431 and guardrails 432. Two guardrails 432 are fixedly spaced on the positioning panel 411, and two threaded rods 431 are rotatably disposed between the two guardrails 432. One end of each threaded rod 431 is rotatably connected to the pressure bearing plate 412, and the other end is rotatably connected to the positioning panel 411 via a bearing seat. In this embodiment, two threaded rods 431 in one set of correction assemblies 43 correspond to one pressure bearing plate 412. During the orientation operation, the spring is placed between the two guardrails 432, and the two threaded rods 431 between the two guardrails 432 support the spring.

[0035] Reference Figure 2 and Figure 4 The photoelectric sensing unit 42 is located between the two threaded rods 431 and can detect the specified position of the spring and the distance between the photoelectric sensor 42 and the specified position of the spring to determine the bending direction of the spring. A displacement groove 4111 is provided on the positioning panel 411 along the length of the threaded rods 431. An adjusting block 414 slides within the displacement groove 4111. The photoelectric sensing unit 42 is fixed to the adjusting block 414. An adjusting assembly 45 for driving the adjusting block 414 to slide is provided on the frame 41. The adjusting assembly 45 includes an adjusting screw 451 and a drive motor 452. The adjusting screw 451 is rotatably connected to the support base 413, and the length direction of the adjusting screw 451 is parallel to the length direction of the threaded rods 431. The adjusting screw 451 is threadedly engaged with the adjusting block 414. The drive motor 452 is fixed to the support base 413, and the output shaft of the drive motor 452 is coaxially fixed with the adjusting screw 451. By adjusting the configuration of component 45 and the shifting slide 4111, the position of the photoelectric sensing unit 42 can be adjusted according to actual needs. The photoelectric sensing unit 42 is an infrared photoelectric sensor.

[0036] Reference Figure 2Specifically, the drive unit 44 includes a driving gear 441, a driven gear 442, and a third drive source 443. Each threaded rod 431 has a driven gear 442 coaxially fixed to one end near the pressure plate 412. The driving gear 441 is located between the two driven gears 442 and meshes with both. The third drive source 443 can be a motor and is electrically connected to the photoelectric sensing unit 42. The third drive source 443 is fixed to the support base 413, and its output shaft is coaxially fixed with the driving gear 441, driving the driving gear 441 to rotate. The driving gear 441, through meshing with the driven gear 442, drives the threaded rod 431 to rotate, thereby correcting the orientation of the spring. In this embodiment, two sets of correction components 43 are spaced apart on the positioning panel 411, and two each are correspondingly provided for the pressure plate 412, drive unit 44, and photoelectric sensing unit 42.

[0037] The photoelectric sensing unit 42 can detect the number of rotations taken by the spring, which is placed on the two threaded rods 431, to reach a set position under the drive of the threaded rods 431, thereby determining the bending direction of the spring and realizing the orientation recognition of the spring. Specifically, when the spring rotates on the two threaded rods 431 to the point where the middle part is convex upward, the third drive source 443 stops operating according to the direction signal detected by the photoelectric sensing unit 42, causing the spring to stop rotating. At this time, the bending direction of the spring is determined according to the different number of rotations of the spring.

[0038] Reference Figure 5 and Figure 6 The thermal pressure device 5 includes a pressure frame 51, a pressure assembly, and a rotary steering assembly 55. The pressure assembly includes a first drive source 52, a fixed base 53 disposed opposite to each other, and a pressing base 54. (Refer to...) Figure 7 The fixed base 53 includes a fixed bracket 531 and a fixed push rod 532 fixed to one side of the fixed bracket 531. The fixed push rod 532 includes an integrally formed fixed rod segment 5321 and a connecting rod segment 5322. The pressing base 54 is slidably connected to the high-pressure machine frame 51 via a slide rail. The first drive source 52 can be a cylinder or a hydraulic cylinder. The first drive source 52 is fixed to the high-pressure machine frame 51, and the telescopic end of the first drive source 52 is fixedly connected to the pressing base 54. Under the drive of the first drive source 52, the pressing base 54 can slide towards or away from the fixed base 53.

[0039] Reference Figure 5The rotary orientation assembly 55 includes a torque detector 551, a rotation source 552, and a torsion clamp 553 and an alignment cylinder 554 arranged opposite to each other. The torsion clamp 553 is a hydraulic four-jaw chuck, and one end of the torsion clamp 553 is rotatably connected to the push base 54; the rotation source 552 is also fixed to the push base 54, and the rotation source 552 can be a servo motor, while the torque detector 551 is a torque sensor. The torque detector 551 is fixed between the output shaft of the rotation source 552 and the torsion clamp 553, and detects the torque value of the torsion clamp 553 in real time when it rotates, so that the rotation source 552 can drive the torsion clamp 553 to rotate. The alignment cylinder 554 is cylindrical and is coaxially sleeved outside the connecting rod segment 5322, with one end of the alignment cylinder 554 fixedly connected to the fixed rod segment 5321. An insertion post 533 is coaxially arranged inside the alignment cylinder 554, and the insertion post 533 is threadedly connected to the connecting rod segment 5322. One end of the insertion post 533 tapers away from the fixed rod segment 5321, specifically forming a frustum, so that it can be spring-loaded. An adjusting groove 5541 is also provided on the inner wall of the alignment cylinder 554. The adjusting groove 5541 is arranged radially along the inner bottom wall of the alignment cylinder 554. A calibration key 556 slides in the adjusting groove 5541. The calibration key 556 is specifically set in the shape of a rectangular plate. One end of the calibration key 556 is fixedly connected to an adjusting push bar 558, and one end of the adjusting push bar 558 extends out of the alignment cylinder 554. A guide plate 555 is welded and fixed to the outer wall of the alignment cylinder 554. The guide plate 555 has a guide bar hole 5551. An adjusting push bar 558 is located on the outer side wall of the alignment cylinder 554 and a guide screw 5581 is fixed thereon. The guide screw is perpendicular to the adjusting push bar 558, and the guide screw 5581 is slidably disposed within the guide bar hole 5551. A locking element is provided outside the alignment cylinder 554, specifically a locking nut 557 threaded to one end of the guide screw 5581. The position can be adjusted by adjusting the push bar 558, the guide screw 5581, and the guide bar hole 5551, and then locked with the locking nut 557. The position of the calibration key 556 can be flexibly adjusted according to the needs of different springs.

[0040] Before the heat-pressing treatment, the transfer device 6 first transfers the spring, which has undergone preliminary orientation on the spring orientation device 4, to between the torsion clamp 553 and the alignment cylinder 554. The torsion clamp 553 holds one end of the spring, and the pusher seat 54 drives the spring to slide towards the fixed seat 53, allowing the other end of the spring to be fitted onto the insertion post 533. Then, the transfer device 6 releases the spring. The pusher seat 54 continues to push the spring until it abuts against the inner bottom wall of the alignment cylinder 554. The rotation source 552 is then activated to drive the torsion clamp 553 to rotate, causing the rotating spring to rotate relative to the alignment cylinder 554. When the end of the spring inside the alignment cylinder 554 abuts against the calibration key 556, the torque detector 551 detects a sudden change in the measured torque value. At this point, the rotation source 552 is turned off, the torsion clamp 553 stops rotating, and the spring's secondary calibration is complete. The first drive source 52 is activated again to drive the pusher seat 54 to slide, performing the heat-pressing treatment on the spring.

[0041] Reference Figure 2 The transfer device 6 is located on one side of the spring orientation device 4. The transfer device 6 can be a robotic arm, which can accurately transport the tempered springs from the spring discharge mechanism 3 to the spring orientation device 4 and the hot pressing device 5 in sequence, realizing the orderly transfer of springs between different processes. In this embodiment, the free end of the transfer device 6 is connected to two transfer clamps 61 so as to transport two springs at the same time.

[0042] The implementation principle of this embodiment is as follows: The spring enters the tempering furnace 1 through the spring feeding mechanism 2 for tempering treatment. The spring discharging mechanism 3 transports the tempered spring out and sends it to the transfer device 6. The transfer device 6 first sends the spring to the spring orientation recognition device 4. The photoelectric sensing unit 42 detects the designated position of the spring and the distance between the photoelectric sensor and the designated position of the spring, thereby obtaining the bending direction of the spring. The drive unit 44 drives the threaded rod 431 to rotate to perform preliminary correction of the spring. Then, the transfer device 6 sends the spring to the hot pressing device 5. The torque orientation recognition component 55 further corrects the orientation of the spring through torque detection and correction key 556. Finally, the hot pressing component performs hot pressing treatment on the spring. The entire process, through multi-stage orientation recognition and correction, effectively ensures the accuracy of orientation recognition during the spring processing, reduces the deformation of the spring caused by orientation deviation during hot pressing treatment, and improves the processing quality of the spring.

[0043] Example 2 This application provides a spring tempering process, which uses the spring tempering equipment in Example 1 to process the spring, including the following steps: S1, Spring Feeding: The spring is placed on the conveyor line 21 of the spring feeding mechanism 2. When the conveyor line 21 transports the spring to the feed inlet 11, the second drive source 222 drives the feed pusher 221 to push the spring toward the feed inlet 11 of the tempering furnace 1. At the same time, the drive component 132 drives the opening and closing plate 131 to rotate and open the feed inlet 11, allowing the spring to enter the tempering furnace 1. During this process, the conveyor line 21 runs smoothly, the feed pusher 221 accurately pushes the spring to the feed inlet 11, and the opening and closing plate 131 opens and closes in a timely manner, ensuring that the spring enters the tempering furnace 1 smoothly and reducing heat loss.

[0044] S2, Tempering Treatment: The spring undergoes tempering treatment in tempering furnace 1 to eliminate internal stress, stabilize dimensions, and improve elasticity and fatigue resistance. Tempering furnace 1 heats the spring using heating elements according to set temperature and time parameters. The temperature of tempering furnace 1 needs to be controlled between 390-405℃, and the tempering time ranges from 20-30 minutes. The tempering temperature and time vary depending on the type and specification of the spring and need to be adjusted according to the actual situation.

[0045] S3, Spring Discharge: After tempering, the springs are conveyed to the end of the furnace conveyor belt 31. The transfer assembly 33 transfers the springs to the discharge conveyor belt 32, which then transports the springs out of the tempering furnace 1. The furnace conveyor belt 31 and the discharge conveyor belt 32 operate synchronously, and the transfer assembly 33 accurately pushes the springs to ensure smooth discharge.

[0046] S4, Initial Orientation: The transfer device 6 transfers the spring from the spring discharge mechanism 3 to the spring orientation recognition device 4. The photoelectric sensing unit 42 detects the designated position of the spring and the distance between the photoelectric sensor and the designated position of the spring. The third drive source 443 drives the drive gear 441 to rotate, which in turn drives the threaded rod 431 to rotate via the driven gear 442, thus performing initial correction of the spring's orientation. The photoelectric sensing unit 42 accurately detects the bending direction of the spring, and the drive unit 44 responds promptly, causing the threaded rod 431 to rotate and effectively correct the spring's orientation.

[0047] S5, Secondary Orientation and Hot Pressing Treatment: The transfer device 6 transfers the initially corrected spring to the hot pressing device 5, placing the spring between the torsion clamp 553 and the alignment cylinder 554. The rotation source 552 is activated to drive the torsion clamp 553 to rotate. After the torque detector 551 detects a sudden change in the measured torque value, the torsion clamp 553 stops rotating, completing the spring orientation recognition. Subsequently, the first drive source 52 is activated to drive the push seat 54 to slide, performing the first compression force measurement on the hot pressing device 5. After the force measurement is completed, the hot pressing device 5 determines the required compression range based on the force measurement result. Based on the determined compression range, the first drive source 52 is activated again to drive the push seat 54 to slide, performing hot pressing treatment on the spring to improve the consistency of the spring after hot pressing. Ensure that the spring completes the hot pressing treatment with the correct orientation. During the hot pressing treatment, the spring temperature must be controlled between 390-405℃.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A spring tempering device, characterized in that, include: The tempering device includes a tempering furnace (1), a spring feeding mechanism (2) and a spring discharging mechanism (3). The spring feeding mechanism (2) is used to transport the spring into the tempering furnace (1), and the spring discharging mechanism (3) is used to transport the spring out of the tempering furnace (1). Spring orientation device (4); The hot press device (5) includes a press frame (51), a press assembly, and a rotary orientation assembly (55). The press assembly includes a first drive source (52), a fixed seat (53) and a push seat (54) arranged opposite to each other. The first drive source (52) is used to drive the push seat (54) to slide. The rotary orientation assembly (55) includes a torque detector (551), a rotation source (552), and a torsion clamp (553) and an alignment cylinder (554) arranged opposite to each other. The torsion clamp (553) is rotatably mounted on the push seat (54). The rotation source (552) is used to drive the torsion clamp (553) to rotate. The alignment cylinder (554) is mounted on the fixed seat (53). A calibration key (556) is provided on the inner wall of the alignment cylinder (554). The torque detector (551) is used to detect the torque value when the torsion clamp (553) rotates. The transfer device (6) is used to transfer the spring from the spring discharge mechanism (3) to the spring orientation device (4) and the heat-pressing device (5) in sequence.

2. The spring tempering device according to claim 1, characterized in that, The spring feeding mechanism (2) includes a conveyor line (21) and a feeding assembly (22), the tempering furnace (1) includes a feed inlet (11), and the conveyor line (21) is located on one side of the feed inlet (11); The feeding assembly (22) includes a feeding pusher (221) and a second drive source (222). The feeding pusher (221) is slidably disposed on the side of the conveyor line (21) away from the tempering furnace (1). The second drive source (222) is used to drive the feeding pusher (221) to slide.

3. The spring tempering device according to claim 2, characterized in that, The feed inlet (11) is also provided with an opening and closing component (13), which includes an opening and closing plate (131) and a driving component (132). The opening and closing plate (131) is rotatably disposed on one side of the feed inlet (11), and the driving component (132) is used to drive the opening and closing plate (131) to rotate.

4. A spring tempering device according to claim 2, characterized in that, The spring discharge mechanism (3) includes an in-furnace conveyor belt (31), a discharge conveyor belt (32), and a material transfer assembly (33); the in-furnace conveyor belt (31) is located inside the tempering furnace (1), and one end of the in-furnace conveyor belt (31) is located close to the feed inlet (11); The discharge conveyor belt (32) is located at one end of the furnace conveyor belt (31) away from the feed inlet (11), and one end of the discharge conveyor belt (32) extends to the outside of the tempering furnace (1); The discharge conveyor belt (32) is arranged perpendicular to the furnace conveyor belt (31), and the material transfer assembly (33) is used to transfer the spring on the furnace conveyor belt (31) to the discharge conveyor belt (32).

5. A spring tempering device according to claim 4, characterized in that, The discharge conveyor belt (32) located outside the tempering furnace (1) has an outer sleeve of a heat preservation box (7). Both sides of the heat preservation box (7) are set with openings, and the heat preservation box (7) is connected to the outer wall of the tempering furnace (1).

6. A spring tempering device according to claim 5, characterized in that, The spring orientation device (4) includes an orientation frame (41), a photoelectric sensing unit (42), and a correction component (43) and a drive unit (44) disposed on the orientation frame (41). The correction component (43) includes parallel threaded rods (431) and guardrails (432). Two guardrails (432) are spaced apart on the orientation frame (41), and two threaded rods (431) are rotatably arranged between the two guardrails (432). The photoelectric sensing unit (42) is disposed between the two threaded rods (431) and is used to detect the specified position of the spring and the distance between the photoelectric sensor (42) and the specified position of the spring. The driving unit (44) is used to drive the threaded rod (431) to rotate.

7. A spring tempering device according to claim 6, characterized in that, The drive unit (44) includes a drive gear (441), a driven gear (442) and a third drive source (443). Each of the threaded rods (431) is coaxially fixed with a driven gear (442). The drive gear (441) meshes with both driven gears (442). The third drive source (443) is used to drive the drive gear (441) to rotate.

8. A spring tempering device according to claim 7, characterized in that, The fixed base (53) includes a fixed bracket (531) and a fixed push rod (532) fixed to one side of the fixed bracket (531). The alignment cylinder (554) is connected to one end of the fixed push rod (532). The alignment cylinder (554) is provided with a plug-in post (533), which is detachably connected to the fixed push rod (532); The calibration key (556) is slidably disposed inside the alignment cylinder (554), and the rotary orientation assembly (55) further includes a locking member for locking the calibration key (556).

9. A spring tempering device according to claim 8, characterized in that, The fixed push rod (532) includes a fixed rod section (5321) and a connecting rod section (5322) disposed at one end of the fixed rod section (5321). One end of the connecting rod section (5322) passes coaxially through the alignment cylinder (554) and is threaded into the insertion post (533). An adjustment groove (5541) is provided on the bottom wall of the alignment cylinder (554). The calibration key (556) is slidably disposed in the adjustment groove (5541). One end of the calibration key (556) is connected to an adjustment push bar (558), and one end of the adjustment push bar (558) extends out of the alignment cylinder (554). A guide plate (555) is fixed on the outer wall of the alignment cylinder (554). A guide bar hole (5551) is provided on the guide plate (555). A guide screw (5581) is fixed on the adjusting push bar (558). The guide screw (5581) is slidably disposed in the guide bar hole (5551). The locking component includes a locking nut (557) threadedly connected to one end of the guide screw (5581).

10. A spring tempering process, characterized in that, The spring is processed using the spring tempering equipment described in any one of claims 7-9, comprising the following steps: S1, Spring feeding: Place the spring on the conveyor line (21) of the spring feeding mechanism (2), and the second drive source (222) drives the feeding pusher (221) to push the spring toward the feed port (11) of the tempering furnace (1). At the same time, the drive component (132) drives the opening and closing plate (131) to rotate and open the feed port (11), so that the spring enters the tempering furnace (1). S2, tempering treatment: The spring is tempered in the tempering furnace (1). The tempering furnace (1) heats the spring according to the set temperature and time parameters. The temperature of the tempering furnace (1) is controlled at 390-405℃ and the tempering time range is 20-30min. S3, Spring discharge: The tempered spring is conveyed to the end of the furnace conveyor belt (31) via the furnace conveyor belt (31), and the material transfer assembly (33) transfers the spring to the discharge conveyor belt (32), and the discharge conveyor belt (32) transports the spring out of the tempering furnace (1). S4, Initial orientation: The transfer device (6) transfers the spring on the spring discharge mechanism (3) to the spring orientation device (4). The photoelectric sensing unit (42) detects the designated position of the spring and the distance between the photoelectric sensor (42) and the designated position of the spring. The third drive source (443) drives the active gear (441) to rotate, and drives the threaded rod (431) to rotate through the driven gear (442) to perform initial correction of the orientation of the spring. S5, Secondary orientation and hot pressing treatment: The transfer device (6) transfers the pre-corrected spring to the hot pressing device (5), and the spring is placed between the torsion clamp (553) and the alignment cylinder (554). The rotation source (552) is started to drive the torsion clamp (553) to rotate. After the torque detector (551) detects a sudden change in the measured torque value, the torsion clamp (553) stops rotating. The first drive source (52) is started to drive the push seat (54) to slide, and the spring is subjected to hot pressing treatment.

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