A quenching device for leaf spring processing

Abstract

The present invention relates to the field of quenching devices, specifically a quenching device for processing leaf springs. It includes a quenching tank, a rolling mechanism, a supporting mechanism, and a transfer mechanism; the inside of the quenching tank is provided with quenching liquid; the rolling mechanism includes a lifting frame, a swinging member rotatably arranged on the lifting frame, a driving assembly driving the swinging member to swing back and forth, and multiple groups of rolling assemblies arranged in a fan shape on the swinging member; the supporting mechanism includes a swinging frame and multiple groups of supporting assemblies arranged side by side on the swinging frame, and the swinging frame is provided with a telescopic mechanism 2 for driving the lifting frame to move up and down. When the lifting frame descends, the multiple groups of rolling assemblies are used to press the workpiece downward in an arc shape onto the multiple groups of supporting assemblies, and the driving assembly drives the swinging member to swing back and forth so that the multiple groups of rolling assemblies can roll on the arc-shaped workpiece; the transfer mechanism is arranged on one side of the quenching tank. The present invention can fully contact the quenching liquid with the steel plate workpiece, and the quenching effect range is large, the quenching of each part of the steel plate is more balanced, and the quenching quality is high.

Description

Technical Field

[0001] The present invention relates to the field of quenching devices, in particular to a quenching device for processing leaf springs. Background Art

[0002] Leaf springs are the most widely used elastic components in automotive suspensions. They are composed of several leaf springs of equal width but unequal length, forming a spring beam of approximately equal strength. The leaf springs require a quenching process to improve their physical properties.

[0003] Chinese patent publication CN212533070U discloses a new quenching device for leaf spring production. The device comprises a housing and a storage mechanism. The housing includes an upper die and a lower die. The lower die has a placement slot defined within it, and a first through-hole defined at the bottom of the placement slot. The upper die also has a second through-hole defined within it. During quenching, water from the reservoir contacts the leaf spring through the first and second through-holes.

[0004] However, the above technical solution has the following shortcomings: the steel plate is placed in the placement groove and extruded by the lower mold and the upper mold. Most areas of the steel plate are in contact with the surfaces of the lower mold and the upper mold. Water can only contact the steel plate through the first through hole and the second through hole for quenching. The quenching effect range is small, the quenching of various parts of the steel plate is uneven, and the quenching quality is low. Summary of the Invention

[0005] The purpose of the present invention is to address the problems existing in the background technology and propose a quenching device for steel plate spring processing, which can fully contact the quenching liquid with the steel plate workpiece, has a large quenching effect range, more balanced quenching of various parts of the steel plate, and high quenching quality.

[0006] The technical solution of the present invention is a quenching device for processing leaf springs, comprising a quenching pool, a rolling mechanism, a supporting mechanism and a transfer mechanism; quenching liquid is provided on the inside of the quenching pool; the rolling mechanism comprises a lifting frame, a swinging member rotatably arranged on the lifting frame, a driving assembly for driving the swinging member to swing back and forth, and multiple groups of rolling assemblies arranged in a fan shape on the swinging member; the supporting mechanism comprises a swinging frame and multiple groups of supporting assemblies arranged side by side on the swinging frame, and the swinging frame is provided with a telescopic mechanism 2 for driving the lifting frame to rise and fall, and when the lifting frame descends, the multiple groups of rolling assemblies are used to press the workpiece in an arc shape onto the multiple groups of supporting assemblies, and the driving assembly drives the swinging member to swing back and forth so as to use the multiple groups of rolling assemblies to roll on the arc-shaped workpiece; the transfer mechanism is arranged on one side of the quenching pool, and immerses or removes the arc-shaped workpiece clamped by the rolling assembly and the supporting assembly into or out of the quenching liquid.

[0007] Preferably, the supporting assembly includes a bracket arranged on the swing frame, a sliding frame vertically slidingly arranged on the bracket, a lifting assembly arranged on the top of the sliding frame, a tension spring connected between the bracket and the sliding frame, and a screw rod vertically threadedly connected to the bracket, a knob is provided at the bottom end of the screw rod, and the screw rod is located below the lifting assembly.

[0008] Preferably, the lifting assembly includes a mounting seat arranged at the top of the sliding frame, a top seat arranged on the mounting seat by rotating through a rotating shaft, a torsion spring sleeved on the rotating shaft and a support plate arranged on the top seat, a plug connector 1 is provided on the mounting seat, a plug connector 2 is provided on the top seat, and the plug connector 1 and the plug connector 2 respectively have a limiting hole 1 and a limiting hole 2 for inserting the two ends of the torsion spring.

[0009] Preferably, a limiting platform is provided at the top end of the screw rod, and a stop platform is provided at the bottom end of the mounting seat for damping rotation, wherein the stop platform has a groove that is inserted into the lower side of the limiting platform.

[0010] Preferably, the rolling assembly includes a mounting frame, a roller rotatably arranged at the bottom end of the mounting frame, and a plurality of fastening assemblies for fastening the mounting frame to the swinging member.

[0011] Preferably, multiple groups of through holes are arranged side by side in the vertical direction on the mounting frame, the swinging member has multiple groups of sockets, the number of sockets is less than the number of through holes, and the fastening assembly includes bolts inserted through the through holes and the sockets, nuts threadedly connected to the bolts, and a sleeve mounted on the bolts and pressed between the mounting frame and the swinging member.

[0012] Preferably, the swinging member is a swinging gear, and the driving assembly includes a rack meshing with the swinging gear and a telescopic mechanism arranged on the lifting frame and driving the rack to move back and forth.

[0013] Preferably, the transfer mechanism includes a fixed frame arranged on the side of the quenching tank, two parallel connecting rods and a telescopic mechanism with two ends hinged to the fixed frame and a connecting rod respectively, and the two ends of the connecting rod are hinged to the fixed frame and the swing frame respectively.

[0014] Compared with existing technologies, the present invention offers the following beneficial technical advantages: It ensures full contact between the quenching liquid and the steel workpiece, resulting in a wide quenching range, more even quenching across the steel plate, and high quenching quality. A transfer mechanism immerses the curved steel workpiece, clamped by the roller assembly and support assembly, in the quenching liquid for quenching. During quenching, the multiple rollers continuously reciprocate, effectively exposing all areas of the steel workpiece's surface to the quenching liquid and providing a uniform quenching treatment across the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the structure of an embodiment of the present invention;

[0016] Figure 2This is a schematic diagram of the status of each supporting component when the steel plate is initially placed;

[0017] Figure 3 is a structural diagram of the supporting component;

[0018] Figure 4 A partial structural cross-sectional view showing the roller assembly being mounted on the swing gear;

[0019] Figure 5 It is a schematic diagram of the lifting principle of the lifting frame and the swing principle structure of the swing frame.

[0020] Figure numerals: 1, quenching pool; 2, fixed frame; 3, swing frame; 4, lifting frame; 401, operating channel; 5, supporting assembly; 50, bracket; 51, sliding frame; 52, mounting seat; 521, plug connector one; 53, tension spring; 54, top seat; 541, plug connector two; 55, torsion spring; 56, support plate; 57, screw; 58, limit platform; 59, stop platform; 6, rolling assembly; 61, mounting frame; 62, roller; 63, bolt; 64, nut; 65, sleeve; 7, swing gear; 701, jack; 8, rack; 9, telescopic mechanism one; 10, telescopic mechanism two; 11, telescopic mechanism three; 12, connecting rod. DETAILED DESCRIPTION

[0021] Example 1, as Figure 1-Figure 5 As shown, the quenching device for processing a leaf spring proposed in this embodiment includes a quenching pool 1, a rolling mechanism, a supporting mechanism and a transfer mechanism.

[0022] The quenching tank 1 contains quenching liquid. When the steel plate workpiece is rolled from a straight state into an arc shape by the rolling mechanism, the steel plate workpiece is located above the quenching liquid and has not yet been immersed in the quenching liquid. After the steel plate workpiece is rolled into the arc shape, it is moved into the quenching liquid by the transfer mechanism for quenching.

[0023] The rolling mechanism includes a lifting frame 4, an oscillating member rotatably mounted on the lifting frame 4, a drive assembly that drives the oscillating member back and forth, and multiple roller assemblies 6 arranged in a fan-shaped pattern on the oscillating member. The oscillating member is a swing gear 7. The rolling assembly 6 includes a mounting frame 61, rollers 62 rotatably mounted at the bottom end of the mounting frame 61, and multiple fastening assemblies that secure the mounting frame 61 to the oscillating member. The rollers 62 in each rolling assembly 6 are arranged in an arc shape, initially pressing the steel plate workpiece from a straight state into a curved state through direct contact. The rollers 62 have multiple axially extending heat dissipation channels that accelerate heat dissipation from the rollers 62.

[0024] like Figure 1As shown, the drive assembly includes a rack 8 meshingly connected to the swing gear 7, and a telescopic mechanism 9 mounted on the lifting frame 4 and driving the rack 8 to move back and forth. The telescopic mechanism 9 uses a hydraulic cylinder. The telescopic mechanism 9 reciprocates and retracts, driving the rack 8 to move back and forth, which in turn drives the swing gear 7 to swing back and forth, which in turn drives the rolling assemblies 6 to swing back and forth. Each roller 62 can roll the upper surface of the bent steel plate workpiece, which is beneficial for rolling the steel plate workpiece into a regular curved plate, improving the forming quality and subsequent quenching quality.

[0025] The support mechanism comprises a swing frame 3 and multiple supporting assemblies 5 arranged side by side on the swing frame 3. The swing frame 3 is equipped with a telescopic mechanism 10 that drives the lifting frame 4 up and down. This telescopic mechanism 10 utilizes a hydraulic cylinder, which can move the lifting frame 4 up and down through a telescopic process. As the lifting frame 4 descends, multiple roller assemblies 6 press the workpiece downward in an arc shape onto the supporting assemblies 5. This is the initial forming process. The driving assembly drives the swing member to oscillate back and forth, allowing the roller assemblies 6 to roll the curved workpiece. This is the fine roll forming process.

[0026] like Figures 1-4 As shown, the support assembly 5 includes a bracket 50 mounted on the swing frame 3, a sliding frame 51 vertically slidingly mounted on the bracket 50, a lifting assembly mounted on top of the sliding frame 51, a tension spring 53 connected between the bracket 50 and the sliding frame 51, and a screw 57 vertically threadedly connected to the bracket 50. The screw 57 has a knob at its bottom and is located below the lifting assembly. The height of each screw 57 is adjusted in advance to appropriately position the downward movement distance of each lifting assembly. When each roller pressing assembly 6 presses the steel plate workpiece on the support assembly 5 from a flat state into an arc, each lifting assembly is distributed in an arc shape, adaptively cooperating with each roller 62.

[0027] The transfer mechanism is disposed on one side of the quenching tank 1. The transfer mechanism includes a fixed frame 2 disposed on the side of the quenching tank 1, two parallel connecting rods 12, and a telescopic mechanism 3 11 hinged at both ends to the fixed frame 2 and one connecting rod 12, respectively. The telescopic mechanism 3 11 utilizes a hydraulic cylinder. The connecting rod 12 is hinged at both ends to the fixed frame 2 and the swing frame 3, respectively. When the telescopic mechanism 3 11 is extended, it drives the connecting rod 12 to rotate downward, which in turn drives the swing frame 3 to rotate downward, immersing the curved steel plate workpiece clamped between the rolling assembly 6 and the supporting assembly 5 into the quenching liquid in the quenching tank 1 to achieve the quenching treatment. When the telescopic mechanism 3 11 is retracted, the workpiece can be removed from the quenching liquid. That is, through the action of the telescopic mechanism 3 11 in the transfer mechanism, the curved workpiece clamped between the rolling assembly 6 and the supporting assembly 5 can be immersed in or removed from the quenching liquid. After the workpiece is immersed in the quenching liquid, it must remain there for a predetermined period of time until the target quenching quality is achieved.

[0028] This embodiment can fully contact the quenching liquid with the steel plate workpiece, resulting in a wide quenching range, more balanced quenching at all locations on the steel plate, and high quenching quality. Before quenching, the straight steel plate workpiece to be processed is placed on multiple horizontally distributed lifting assemblies. The lifting frame 4 is then driven downward by the telescopic mechanism 10. The lifting frame 4 drives the swing gear 7 and the rolling assembly 6 downward. The rolling mechanism presses the steel plate workpiece from a straight plate into an arc-shaped plate, and multiple groups of supporting assemblies 5 support the workpiece in an arc shape. Subsequently, the rack 8 is driven back and forth by the telescopic mechanism 9. The rack 8 drives the swing gear 7 to swing back and forth to achieve the reciprocating swing of each rolling assembly 6. Multiple rollers 62 are used to roll the arc-shaped steel plate workpiece, processing it into a steel plate with a more balanced curvature at all locations. Then, the arc-shaped steel plate workpiece clamped by the rolling assembly 6 and the supporting assembly 5 is immersed in the quenching liquid for quenching through the transfer mechanism. During quenching, multiple rollers 62 continue to roll back and forth, so that all parts of the surface of the steel plate workpiece are effectively exposed to the quenching liquid, and the steel plate workpiece is evenly quenched.

[0029] Example 2, as Figure 1-Figure 5 As shown, the present embodiment proposes a quenching device for processing a steel plate spring. Compared with the first embodiment, in the present embodiment, the lifting assembly includes a mounting seat 52 provided at the top of a sliding frame 51, a top seat 54 provided on the mounting seat 52 by rotating a rotating shaft, a torsion spring 55 sleeved on the rotating shaft, and a support plate 56 provided on the top seat 54. The support plate 56 can be an L-shaped plate, which can regularly position the steel plate workpiece during its placement. A plug connector 1 521 is provided on the mounting seat 52, and a plug connector 2 541 is provided on the top seat 54. The plug connector 1 521 and the plug connector 2 541 respectively have a limiting hole 1 and a limiting hole 2 for inserting the two ends of the torsion spring 55. Both ends of the torsion spring 55 have an extension rod portion, and the two extension rod portions are respectively inserted into the limiting hole 1 and the limiting hole 2.

[0030] In this embodiment, when the steel plate workpiece to be processed is initially placed, the torsion spring 55 is in an untwisted state, and the support plates 56 in each support assembly 5 are horizontally distributed, which can be used to flatly place the straight steel plate workpiece to be processed. When each rolling assembly 6 presses the straight steel plate workpiece downward into an arc, each support plate 56 is driven by the steel plate workpiece to rotate, causing the torsion spring 55 to twist. The top surface of each support plate 56 is tangent to the bottom surface of the steel plate workpiece, and each tangent point is located on an arc centered on the central axis of rotation of the swing gear 7, which is conducive to adaptive support and clamping of the arc-shaped steel plate workpiece. After the arc-shaped steel plate workpiece is immersed in quenching oil and quenched, the steel plate workpiece is removed, and the torsion spring 55 can automatically twist and drive each corresponding support plate 56 to return to its initial horizontal distribution state, so that it can be used to flatly support the steel plate workpiece to be processed during the next processing.

[0031] Example 3, as Figure 1-Figure 5As shown, this embodiment provides a quenching device for processing leaf springs. Compared to the second embodiment, in this embodiment, a limiter 58 is provided at the top of the screw 57, and a stopper 59 is provided at the bottom of the mounting seat 52 to dampen rotation. The stopper 59 has a groove that engages the underside of the limiter 58. When adjusting the height of the limiter 58 by rotating the screw 57, a ruler is used to measure the distance from the top of the limiter 58 to the bottom of the mounting seat 52 to determine the distance the slide 51 can slide downward, thereby determining the downward movement range of the support plate 56. Based on the length of the steel workpiece, several support assemblies 5 distributed centrally are selected for support. For these support assemblies 5, the height of the limiters 58 in each support assembly 5 gradually increases from the middle position to the sides. This ensures that when the support plates 56 are moved downward to the position for supporting the steel workpiece bent by the roller assembly 6, the top surface of each support plate 56 in each support assembly 5 is tangent to the bottom surface of the steel workpiece, and each tangent position lies on the same arc centered on the rotation center of the swing gear 7.

[0032] For the supporting components 5 on both sides that are not used to support steel plate workpieces, first rotate the knob to drive the screw 57 upward, and the screw 57 drives the limit platform 58 to move up to a position that contacts the mounting seat 52. Then rotate the damping stop 59 to engage the groove on the outer periphery of the screw 57 on the lower side of the limit platform 58. Then rotate the knob in the opposite direction to drive the screw 57 downward. The screw 57 pulls the stop 59 through the limit platform 58, and continues to pull the mounting seat 52 downward, thereby driving the support plate 56 downward until the support plate 56 is lowered to a position where it does not contact the steel plate workpieces in various processing states.

[0033] This embodiment can determine the final height of each support plate 56 for supporting the steel plate workpiece by adjusting the height of the limit platform 58, so that the tangent points of each support plate 56 and the bottom surface of the steel plate workpiece are on the same arc, and the rolling assembly 6 can be used to roll out steel plate workpieces with uniform curvature on each supporting assembly 5, and ensure the balanced quenching of each area of ​​the steel plate workpiece.

[0034] Example 4, as Figure 1-Figure 5As shown, this embodiment proposes a quenching device for leaf spring processing. Compared to the first embodiment, in this embodiment, the mounting frame 61 is provided with multiple sets of through-holes arranged side by side in the vertical direction, and the swinging member has multiple sets of sockets 701, with the number of sockets 701 being less than the number of through-holes. Positioning is achieved by aligning through-holes at different positions on the mounting frame 61 with the sockets 701, and subsequently tightening is performed using a fastening assembly. The fastening assembly includes a bolt 63 inserted through the through-hole and the socket 701, a nut 64 threadedly connected to the bolt 63, and a sleeve 65 that fits over the bolt 63 and is compressed between the mounting frame 61 and the swinging member. The bolt 63 is inserted through the through-hole and the socket 701. During the insertion process, the sleeve 65 is installed on both sides of the swinging member. The nut 64 is screwed onto the other end of the bolt 63 and tightened to secure the mounting frame 61 to the swinging member. The lifting frame 4 has an operating channel 401 to facilitate the assembly and disassembly of the fastening assembly from the rear side of the lifting frame 4.

[0035] This embodiment can install the fastening components at the through holes at different positions on the mounting frame 61, so that the position of the mounting frame 61 can be adjusted, and then the position of the roller 62 can be adjusted, that is, the distance from each roller 62 to the central axis of rotation of the swinging member can be adjusted, so as to be suitable for roller forming, clamping and quenching of steel plate workpieces with different curvatures.

[0036] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A quenching device for leaf spring processing, characterized in that: include: A quenching tank (1) having a quenching liquid inside; The rolling mechanism comprises a lifting frame (4), a swinging member rotatably arranged on the lifting frame (4), a driving assembly for driving the swinging member to swing back and forth, and a plurality of rolling assemblies (6) arranged in a fan shape on the swinging member; The supporting mechanism comprises a swing frame (3) and a plurality of supporting assemblies (5) arranged side by side on the swing frame (3); the swing frame (3) is provided with a telescopic mechanism (10) for driving the lifting frame (4) to move up and down; when the lifting frame (4) descends, the plurality of roller pressing assemblies (6) are used to press the workpiece downward in an arc shape on the plurality of supporting assemblies (5); the driving assembly drives the swing member to swing back and forth so as to use the plurality of roller pressing assemblies (6) to roll on the arc-shaped workpiece; the supporting assembly (5) comprises a bracket (50) arranged on the swing frame (3), a sliding frame (51) vertically slidingly arranged on the bracket (50), a lifting assembly arranged at the top of the sliding frame (51), and a support assembly connected between the bracket (50) and the sliding frame (51). A tension spring (53) and a screw rod (57) vertically threadedly connected to the bracket (50), a knob is provided at the bottom end of the screw rod (57), and the screw rod (57) is located below the lifting assembly; the lifting assembly includes a mounting seat (52) provided at the top end of the sliding frame (51), a top seat (54) provided on the mounting seat (52) by rotating through a rotating shaft, a torsion spring (55) sleeved on the rotating shaft, and a support plate (56) provided on the top seat (54), a plug connector 1 (521) is provided on the mounting seat (52), a plug connector 2 (541) is provided on the top seat (54), and the plug connector 1 (521) and the plug connector 2 (541) respectively have a limiting hole 1 and a limiting hole 2 for inserting the two ends of the torsion spring (55); The transfer mechanism is arranged on one side of the quenching tank (1) and is used to immerse or remove the arc-shaped workpiece clamped by the roller assembly (6) and the supporting assembly (5) into or out of the quenching liquid.

2. A quenching device for leaf spring processing according to claim 1, characterized in that: A limiting platform (58) is provided at the top of the screw rod (57), and a stop platform (59) is provided at the bottom of the mounting seat (52) for damping rotation. The stop platform (59) has a groove that is snapped into the lower side of the limiting platform (58).

3. The quenching device for leaf spring processing according to claim 1, characterized in that: The rolling assembly (6) comprises a mounting frame (61), a roller (62) rotatably arranged at the bottom end of the mounting frame (61), and a plurality of fastening assemblies for fastening the mounting frame (61) to the swing member.

4. A quenching device for leaf spring processing according to claim 3, characterized in that: A plurality of through holes are arranged side by side in a vertical direction on the mounting frame (61), the swinging member has a plurality of plug holes (701), the number of the plug holes (701) is less than the number of the through holes, and the fastening assembly includes a bolt (63) inserted into the through holes and the plug holes (701), a nut (64) threadedly connected to the bolt (63), and a sleeve (65) sleeved on the bolt (63) and pressed between the mounting frame (61) and the swinging member.

5. The quenching device for leaf spring processing according to claim 1, characterized in that: The swinging member is a swinging gear (7), and the driving assembly includes a rack (8) meshingly connected with the swinging gear (7) and a telescopic mechanism (9) arranged on the lifting frame (4) and driving the rack (8) to move back and forth.

6. The quenching device for leaf spring processing according to claim 1, characterized in that: The transfer mechanism comprises a fixed frame (2) arranged on the side of the quenching tank (1), two parallel connecting rods (12), and a telescopic mechanism (11) whose two ends are respectively hinged to the fixed frame (2) and a connecting rod (12), and the two ends of the connecting rod (12) are respectively hinged to the fixed frame (2) and the swing frame (3).

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