Quenching device applied to automobile fastener processing

Abstract

The application relates to the technical field of automobile fastener processing, and discloses a quenching device applied to automobile fastener processing, which comprises guide rails, quenching treatment furnace bodies arranged at the two ends of the guide rails and quenching medium grooves used for fastener quenching, and the side parts of the quenching treatment furnace bodies are hingedly connected with furnace doors; the quenching device further comprises: a fastener hanger which can move along the guide rails, is provided with a bearing part used for bearing fastener heads and a gravity-dependent fastener nut part, and is provided with at least one butt joint rod; a butt joint traction locking mechanism arranged on the furnace door, the butt joint traction locking mechanism comprises: a connecting sleeve movably arranged on the furnace door along the axial direction of the connecting sleeve; and the application realizes self-adaptive loading of the fastener by cooperation of multiple rows of supporting rods and arc-shaped guide-in parts at the end parts of the supporting rods, each fastener is independently hung and does not stack with each other, and the problems of uneven heating caused by stacking in the traditional bulk loading mode and mutual bumping and damage are solved.

Description

Technical Field

[0001] This invention relates to the technical field of automotive fastener processing, and in particular to a quenching device for automotive fastener processing. Background Technology

[0002] Automotive fasteners, such as cylinder head bolts, connecting rod bolts, and wheel bolts, are critical safety components of automotive powertrains and chassis systems. Their service conditions impose extremely stringent requirements on strength, fatigue life, and dimensional consistency. Quenching is the core process for obtaining martensitic structure and enhancing the performance of these fasteners. The temperature uniformity during quenching, the control of part posture, and the smoothness of inter-process transfer directly determine the final product quality. Currently, the mass quenching and heating of automotive fasteners mainly uses mesh belt furnaces or pusher furnaces. In these traditional devices, a large number of fasteners are laid flat on the mesh belt or piled in baskets in a loose state and pushed into the heating furnace. This method of bulk stacking and overall pushing has the following problems: 1. Fasteners stacked in bulk are piled up on top of each other. The fasteners in the center and the edge of the pile are subjected to significantly different heating conditions, which leads to inconsistent austenitization degree of parts in the same batch. After quenching, defects such as large hardness difference and uneven metallographic structure often occur, which seriously affect the torque coefficient stability and fatigue life of automotive fasteners. 2. During the conveying and pushing process, the bulk fasteners frequently collide and rub against each other, and the threaded parts are very prone to micro-dents, which reduce the fatigue strength of the fasteners and affect the accuracy of assembly torque control, thus creating potential safety hazards. 3. In existing devices, once the fasteners are installed in the furnace, their posture and heating surface inside the furnace are basically fixed. Even if a suspension method is used, the contact surface between the fasteners and the hanger is blocked for a long time, forming a heating dead zone, which cannot fundamentally solve the problem of uniformity. Therefore, there is an urgent need for a quenching device for automotive fastener processing to solve the above problems. Summary of the Invention

[0003] The purpose of this invention is to provide a quenching device for automotive fastener processing, aiming to solve the problems in the prior art.

[0004] The present invention is implemented as follows: a quenching device for processing automotive fasteners includes a guide rail, a quenching furnace body disposed at both ends of the guide rail, and a quenching medium tank for quenching fasteners. The quenching furnace body is hinged to a furnace door on its side. Also includes: The fastener bracket is movable along the guide rail. The fastener bracket is provided with a bearing part for supporting the fastener head and causing the fastener nut part to hang down due to gravity, as well as at least one connecting rod. A docking traction locking mechanism is installed on the furnace door, and the docking traction locking mechanism includes: A connecting sleeve is movably inserted into the furnace door along its own axis; A locking rod is rotatably disposed within the connecting sleeve. One end of the locking rod located inside the furnace is provided with a fixed clamping part and a movable clamping part, which are used to clamp the end of the connecting rod in the locked state. In addition, a locking drive mechanism is connected to the connecting sleeve for driving the connecting sleeve to reciprocate along its axial direction, thereby driving the bearing part of the fastener bracket to move closer to or away from the furnace door through the clamped docking rod.

[0005] Preferably, the locking drive mechanism includes: Drive motor; The crank slide bar is connected to the output shaft of the drive motor. The slide is slidably mounted on a guide plate on the furnace door and connected to the crank slide rod so as to slide back and forth under the drive of the drive motor. The slide is provided with a top block and a roller is installed at the end of the top block. An assembly bracket is fixed to the connecting sleeve and can slide along the guide rod fixed to the furnace door. The assembly bracket is provided with an arc-shaped guide plate that cooperates with the top block. An elastic reset element is sleeved on the guide rod and applies an elastic force toward the furnace door to the assembly bracket; When the slide reciprocates, the top block pushes the arc-shaped guide plate through its rollers, causing the assembly bracket and connecting sleeve to overcome the elastic force of the elastic reset member and move away from the furnace door. When the top block retracts, it is pushed back to its original position by the elastic reset member.

[0006] Preferably, the locking rod is installed in the connecting sleeve via a bearing, and the fixing clamping part is fixedly disposed at the end of the locking rod and rotates with the locking rod; The locking rod is coaxially and fixedly connected to a drive gear at one end inside the furnace. The movable clamping part is rotatably sleeved on the locking rod, and its outer edge is provided with a toothed ring that meshes with the drive gear; When the locking rod rotates, the engagement of the drive gear and the gear ring causes the movable clamping part to rotate relative to the locking rod and the fixed clamping part, thereby changing the angle between the movable clamping part and the fixed clamping part to clamp or release the end of the docking rod.

[0007] Preferably, the support portion of the fastener bracket includes: Support frame; At least two layers of support rod groups are spaced apart along the height direction, and each layer of support rod group includes multiple support rods arranged in parallel at equal intervals; A bracket is telescopically mounted on the support rod, the end of which has an arc-shaped guide portion to facilitate the sliding of fasteners; In each layer of the support rod group, the brackets that are adjacent to each other are used to support the head of the fastener. The space between the brackets is formed to allow the nut part of the fastener to pass freely. As the fastener slides in along the arc-shaped guide, it adapts its posture by its own weight until the head is placed on the bracket and the nut part hangs down through the gap between the layer brackets. The connecting rod is located below the bracket, and its end has a bent portion, which is clamped between the fixed clamping portion and the movable clamping portion.

[0008] Preferably, there are multiple docking rods, and each rod corresponds to a bracket spaced apart in each layer of the support rod group. The furnace door is provided with multiple docking traction locking mechanisms.

[0009] Preferably, the support frame is provided with a plurality of plug-in plates, and the plug-in plates are provided with strip-shaped plug-in slots, and the support rod is inserted through the strip-shaped plug-in slots; Several of the aforementioned support rods are fitted with mutually abutting eccentric abutting plates on the outer sections extending out from the other side of the support frame. The end shafts of the eccentric abutting plates are connected to synchronous hanging rings, and a synchronous rod passes through all the synchronous hanging rings, so that each eccentric abutting plate rotates synchronously.

[0010] Preferably, a telescopic adjusting rod is fixed on the support frame at the position corresponding to the eccentric abutment; The end of the adjusting rod is equipped with a stop wheel, which abuts against the eccentric side of one of the eccentric stop plates; By adjusting the extension and retraction of the adjusting rod, the eccentric abutment can be rotated, which in turn drives all the eccentric abutments to rotate synchronously through the synchronizing rod, thereby achieving fine adjustment of the spacing between each support rod.

[0011] Preferably, the guide rail is C-shaped, and a lower conveying trolley is movably mounted on the guide rail along a first horizontal direction. An upper conveying trolley for carrying the fastener bracket is movably mounted on the lower conveying trolley along a second horizontal direction. The quenching furnace body and the quenching medium tank are both equipped with tracks on the same horizontal plane as the lower conveyor trolley; The fastener bracket also includes four lifting rings, which are used to lift the fastener bracket as a whole into the quenching medium tank via the hanging bracket.

[0012] Preferably, it also includes an electrical control box disposed on one side of the quenching furnace body. The electrical control box is disposed on the outer wall of the quenching furnace body or on the furnace door and is electrically connected to the sensors inside the quenching furnace body for monitoring the working status inside the furnace body.

[0013] Preferably, it also includes an electrical control box, which is installed on the outer wall of the quenching furnace or on the furnace door and is electrically connected to a sensor inside the quenching furnace to monitor the working status inside the furnace.

[0014] The beneficial effects of the quenching device disclosed in this invention, applied to the processing of automotive fasteners, are as follows: 1. This invention achieves self-adaptive loading of fasteners by relying on their own gravity through the cooperation of multiple rows and layers of support rods and the arc-shaped guide part at the end of the support rods. Each fastener is suspended independently and does not stack with each other, which solves the problems of uneven heating and mutual collision damage caused by traditional bulk loading methods. 2. The docking traction locking mechanism has dual functions of traction drive and furnace spin drive. During the heating process, the same drive motor and transmission mechanism are used to make the spacer bracket reciprocate horizontal misalignment movement, drive the fastener to slowly spin around its own axis, so that all parts of the fastener are evenly exposed to the heat radiation and atmosphere in the furnace, eliminate the dead zone of heating, and significantly improve the heating uniformity and the consistency of the structure. 3. The present invention achieves single-piece separate loading, automated conveying, in-furnace spin heating and vertical quenching cooling of fasteners in a compact structural layout, effectively avoiding hardness differences caused by uneven heating and ensuring the overall processing quality stability of automotive fasteners. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a quenching device for automotive fastener processing provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of a quenching heat treatment furnace body of a quenching device for automotive fastener processing provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of a furnace door for a quenching device applied to the processing of automotive fasteners, provided by an embodiment of the present invention. Figure 4 This invention provides a quenching device for automotive fastener processing. Figure 3 Schematic diagram of section AA along the direction of the arrow; Figure 5 This invention provides a quenching device for automotive fastener processing. Figure 4 A magnified schematic diagram of the structure at point B in the diagram; Figure 6 This is a schematic diagram of a fastener bracket structure of a quenching device for automotive fastener processing provided in an embodiment of the present invention; Figure 7 This invention provides a quenching device for automotive fastener processing. Figure 6 Another perspective illustration; Figure 8 This invention provides a quenching device for automotive fastener processing. Figure 7 A magnified schematic diagram of the structure at point C in the diagram; Figure 9 This is a schematic diagram from another perspective of a quenching device fastener bracket for automotive fastener processing provided in an embodiment of the present invention.

[0016] Marker explanation: 1. Quenching furnace body; 2. Guide rail; 3. Lower conveyor trolley; 4. Upper conveyor trolley; 5. Fastener bracket; 6. Quenching medium tank; 11. Electrical control box; 12. Furnace door; 121. Drive motor; 122. Assembly bracket; 123. Connecting sleeve; 124. Locking rod; 125. Guide plate; 126. Carriage; 1211 Crank slide bar; 1221 Arc-shaped guide plate; 1222 Guide rod; 1223 Elastic reset component; 1261 Top block; 1271 Fixed clamping part; 1272 Movable clamping part; 51. Support frame; 52. Connecting plate; 53. Support rod; 54. Bracket; 55. Connecting rod; 56. Adjusting rod; 57. Synchronizing rod; 58. Lifting ring; 531. Eccentric abutment; 532. Synchronous hanging ring. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0018] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0019] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0020] In this embodiment: Reference Figures 1-4 The diagram shows a preferred embodiment of the present invention.

[0021] This embodiment of a quenching device for automotive fastener processing includes a guide rail 2, a quenching furnace body 1 disposed at both ends of the guide rail 2, and a quenching medium tank 6 for fastener quenching. A furnace door 12 is hinged to the side of the quenching furnace body 1. It also includes: a fastener bracket 5, which can move along the guide rail 2, the fastener bracket 5 being provided with a bearing portion for bearing the fastener head, and at least one connecting rod 55; A docking traction locking mechanism is disposed on the furnace door 12. The docking traction locking mechanism includes: The connecting sleeve 123 is movable along its own axis and passes through the furnace door 12; The locking rod 124 is rotatably disposed in the connecting sleeve 123. One end of the rod located inside the furnace is provided with a fixed clamping part 1271 and a movable clamping part 1272 for clamping the end of the docking rod 55 in the locked state. In addition, a locking drive mechanism is connected to the connecting sleeve 123 for driving the connecting sleeve 123 to reciprocate along its axial direction, thereby driving the bearing part of the fastener bracket 5 to move closer to or away from the furnace door 12 through the clamped docking rod 55.

[0022] Specifically, the locking drive mechanism includes: a drive motor 121; The crank slide 1211 is connected to the output shaft of the drive motor 121. The slide 126 is slidably mounted on the guide plate 125 on the furnace door 12 and connected to the crank slide rod 1211 so as to slide back and forth under the drive of the drive motor 121. The slide 126 is provided with a top block 1261 and a roller is installed at the end of the top block 1261. The mounting bracket 122 is fixed on the connecting sleeve 123 and can slide along the guide rod 1222 fixed to the furnace door 12. The mounting bracket 122 is provided with an arc-shaped guide plate 1221 that cooperates with the top block 1261. The elastic reset member 1223 is sleeved on the guide rod 1222 and applies an elastic force toward the furnace door 12 to the mounting bracket 122; During use, the drive motor 121 drives the crank slide rod 1211 to move, converting the rotational motion into the linear reciprocating sliding of the slide 126 along the guide plate 125. When the slide 126 slides away from the furnace door 12, the roller at the end of the top block 1261 pushes the arc-shaped guide plate 1221 on the assembly bracket 122, overcoming the elastic force of the elastic reset member 1223, and pushing the assembly bracket 122 and the connecting sleeve 123 fixed thereto to move away from the furnace door 12 along the guide rod 1222. When the slide 126 slides closer to the furnace door 12 and retracts, the top block 1261 disengages from the arc-shaped guide plate 1221 or reduces the thrust, and the assembly bracket 122 automatically resets under the elastic force of the elastic reset member 1223, driving the connecting sleeve 123 to move closer to the furnace door 12. In this way, the connecting sleeve 123 reciprocates along its axial direction through the reciprocating sliding of the slide 126.

[0023] Furthermore, such as Figure 5 As shown, the locking rod 124 is installed in the connecting sleeve 123 via a bearing, and the fixing clamping part 1271 is fixedly disposed at the end of the locking rod 124 and rotates with the locking rod 124; The locking rod 124 is coaxially fixedly connected to a drive gear at one end inside the furnace. The movable clamping part 1272 is rotatably sleeved on the locking rod 124, and its outer edge is provided with a toothed ring that meshes with the drive gear; The load-bearing part includes: a support frame 51; At least two layers of support rod groups are spaced apart along the height direction, and each layer of support rod group includes multiple support rods 53 that are equally spaced and parallel; The bracket 54 is telescopically mounted on the support rod 53. The bracket 54 is used to directly support the fastener. The end of the support rod 53 has an arc-shaped guide portion to facilitate the sliding of the fastener. In each layer of support rods, the brackets 54 adjacent to each other are used to support the head of the fastener. The space between the brackets 54 is formed to allow the nut part of the fastener to pass freely. The arc-shaped guide part is located at the feeding end of the support rod 53. When the fastener slides in from the feeding end, the head of the fastener slides along the surface of the support rod 53 under the guidance of the arc-shaped guide part and under its own gravity and automatically falls into the gap between the adjacent brackets 54. The head is supported on the bracket 54, and the nut part hangs down naturally under the action of gravity, passing through the space between the adjacent brackets 54, completing automatic alignment and posture adjustment. This allows the fastener to automatically form a vertical hanging posture with the head facing up and the nut part facing down (the nut part has a large mass) without manual intervention during the loading process, providing the best posture conditions for subsequent uniform heating and quenching. It is worth noting that, such as Figure 6As shown, the docking rod 55 is located below the bracket 54, and its end has a bent portion, which is clamped between the fixed clamping portion 1271 and the movable clamping portion 1272.

[0024] When the operator closes the furnace door 12, the locking rod 124 causes its end fixed clamping part 1271 to abut against the bent surface of the connecting rod 55. When the locking rod 124 is rotated, the drive gear meshes with the gear ring, driving the movable clamping part 1272 to rotate relative to the locking rod 124 and the fixed clamping part 1271, thereby changing the angle between the movable clamping part 1272 and the fixed clamping part 1271. When the angle decreases, the clamping surface of the movable clamping part 1272 moves closer to the clamping surface of the fixed clamping part 1271 to clamp the bent part of the connecting rod 55; when the angle increases, the clamping surfaces move away from each other, releasing the end of the connecting rod 55. At this time, in conjunction with the locking drive mechanism, the spacer 54 with the docking rod 55 can be moved back and forth, thereby causing horizontal misalignment between adjacent spacers 54, allowing the fastener head to spin, thereby improving the uniformity of heating during quenching, avoiding hardness differences in different parts of the fastener due to uneven heating, and ensuring the stability of the overall processing quality of automotive fasteners.

[0025] Furthermore, to achieve reliable multi-point traction, there are multiple docking rods 55, which correspond one-to-one with the positions of the brackets 54 spaced apart in each layer of support rod group. Multiple docking traction locking mechanisms are correspondingly provided on the furnace door 12, and multiple docking points are subjected to force simultaneously, ensuring that the fastener bracket 5 is subjected to uniform force and runs smoothly during the traction process, avoiding deviation or jamming caused by single-point force.

[0026] like Figures 7-9 As shown, in order to achieve rapid and synchronous adjustment of the spacing between each support rod 53 on the same layer to accommodate fasteners with different head sizes, the support frame 51 is provided with several plug-in plates 52. The plug-in plates 52 are provided with strip-shaped plug-in slots. The support rods 53 are inserted through the strip-shaped plug-in slots. The strip-shaped plug-in slots provide a certain displacement space for the support rods 53, making their spacing adjustable. Several of the aforementioned support rods 53 extend out of the outer section of the support frame 51 and are fitted with mutually abutting eccentric abutting pieces 531. The eccentric sides of adjacent eccentric abutting pieces 531 are in contact with each other. When one of the eccentric abutting pieces 531 rotates, the displacement change of its eccentric side will be transmitted to the adjacent eccentric abutting pieces 531 in sequence, thereby pushing or pulling the corresponding support rod 53 to move in the strip-shaped insertion groove and changing the distance between adjacent support rods 53. The end shaft of the eccentric abutting piece 531 is connected to a synchronous hanging ring 532, and a synchronous rod 57 passes through all the synchronous hanging rings 532, so that each eccentric abutting piece 531 rotates synchronously.

[0027] To facilitate operation and achieve precise fine-tuning, a telescopic adjusting rod 56 is fixed on the support frame 51 at the position corresponding to the eccentric abutment piece 531; an abutment wheel is installed at the end of the adjusting rod 56, and the abutment wheel abuts against the eccentric side of one of the eccentric abutment pieces 531. During adjustment, the operator rotates or extends the adjusting rod 56 to push the abutment wheel to press against the eccentric abutment piece 531, forcing the eccentric abutment piece 531 to rotate. The rotation of the eccentric abutment piece 531 is transmitted synchronously to all eccentric abutment pieces 531 through the linkage of the synchronous hanging ring 532 and the synchronous rod 57, so that all eccentric abutment pieces 531 rotate synchronously by the same angle. The synchronous rotation of the eccentric abutment pieces 531 pushes each support rod 53 to move synchronously in the strip insertion groove, thereby achieving synchronous and precise fine-tuning of the spacing of all support rods 53. Finally, the adjustment is locked by extending the adjusting rod 56. This mechanical linkage synchronous adjustment mechanism has a simple and reliable structure, does not require individual adjustment, and can complete the calibration of the spacing of the entire layer of support rods 53 in one adjustment, which greatly improves the efficiency of model changeover.

[0028] To achieve stable transport and automatic transfer of the fastener bracket 5 on the guide rail 2, the guide rail 2 is C-shaped. A lower transport trolley 3 is movably mounted on the guide rail 2 along a first horizontal direction, and the lower transport trolley 3 runs along a second horizontal direction of the guide rail 2. An upper transport trolley 4 for carrying the fastener bracket 5 is movably mounted on the lower transport trolley 3 along a second horizontal direction perpendicular to the first horizontal direction. The running directions of the upper transport trolley 4 and the lower transport trolley 3 are perpendicularly offset from each other in the horizontal plane. The quenching furnace body 1 and the quenching medium tank 6 are both equipped with tracks on the same horizontal plane as the lower conveying trolley 3, so that the lower conveying trolley 3 can smoothly drive into the furnace body or above the quenching tank without manual handling. The upper conveying trolley 4 is used to carry the fastener bracket 5 and move it horizontally in the second horizontal direction, so that the bracket can be aligned with different positions of the furnace door 12 or the quenching tank to achieve two-dimensional positioning in the plane.

[0029] The fastener bracket 5 also includes four lifting rings 58, which are used to lift the fastener bracket 5 as a whole into the quenching medium tank 6 via the hanging frame. The lifting rings 58 are symmetrically distributed at the four corners of the fastener bracket 5 to ensure that the bracket remains horizontal during lifting and that the fasteners will not slip or collide due to tilting.

[0030] To facilitate real-time monitoring and automated control of the quenching process, an electrical control box 11 is also included, located on one side of the quenching furnace body 1. The electrical control box 11 is located on the outer wall of the quenching furnace body 1 or on the furnace door 12, and is electrically connected to the sensors inside the quenching furnace body 1 to monitor the working status inside the furnace. The sensors may include temperature sensors, atmosphere sensors, etc. The electrical control box 11 receives sensor signals and automatically adjusts parameters such as heating power, atmosphere flow rate, and conveying cycle time to ensure the stability and repeatability of the quenching process.

[0031] During use, according to the specifications of the automotive fasteners to be processed, the spacing of the support rods 53 in each layer of support rod groups is adjusted synchronously through the linkage mechanism of the adjusting rod 56 and the eccentric abutment 531, so that the gap between adjacent brackets 54 matches the size of the fastener head. During adjustment, the operator rotates or extends the adjusting rod 56, driving the abutment wheel to push one of the eccentric abutments 531 to rotate. This eccentric abutment 531, through the linkage of the synchronous hanging ring 532 and the synchronous rod 57, drives all the eccentric abutments 531 to rotate synchronously at the same angle, thereby pushing each support rod 53 to move synchronously in the strip insertion slot of the insertion plate 52, completing the precise fine adjustment of the spacing of the entire layer of support rods 53 in one go, and then locking it through the extension adjusting rod 56. The spacing adjustment mechanism of each layer of support rod groups is independent of each other and can be set separately according to the size requirements of different parts of the fastener.

[0032] The fasteners to be processed are fed into the arc-shaped inlet at the feed end of the support rod 53. Guided by the arc-shaped inlet and under their own gravity, the fasteners slide along the surface of the support rod 53 and automatically fall into the gap between adjacent brackets 54. During this process, the fasteners adaptively adjust their posture by their own gravity, with the head resting on the bracket 54 and the nut hanging naturally downward under gravity, passing through the space between the brackets 54. Each fastener is suspended independently and does not stack with others, laying the foundation for subsequent uniform heating and quenching cooling.

[0033] The lower conveying trolley 3 runs along the first horizontal direction of the guide rail 2, and transports the upper conveying trolley 4 carrying the fastener bracket 5 to the furnace door 12 of the quenching furnace body 1. Then, the upper conveying trolley 4 moves along the second horizontal direction perpendicular to the first horizontal direction and makes a fine adjustment in position in the horizontal plane so that each docking rod 55 on the fastener bracket 5 is precisely aligned with the corresponding docking traction locking mechanism on the furnace door 12.

[0034] The bent portion of the connecting rod 55 on the fastener bracket 5 extends into the space between the fixed clamping portion 1271 and the movable clamping portion 1272 of the docking traction locking mechanism on the furnace door 12. The operator rotates the locking rod 124, which causes the fixed clamping portion 1271 at its end to abut against the bent portion surface of the connecting rod 55. At the same time, through the meshing of the drive gear and the gear ring, the movable clamping portion 1272 is driven to rotate relative to the locking rod 124 and the fixed clamping portion 1271, so that the included angle between the movable clamping portion 1272 and the fixed clamping portion 1271 is reduced. The clamping surface of the movable clamping portion 1272 moves closer to the clamping surface of the fixed clamping portion 1271, clamping the bent portion of the connecting rod 55, thus completing the reliable locking of the fastener bracket 5 and the furnace door 12. Multiple connecting rods 55 are locked with multiple sets of docking traction locking mechanisms at the same time to ensure uniform force during traction.

[0035] The drive motor 121 starts, driving the crank slide rod 1211 to move, converting the rotational motion into the linear reciprocating sliding of the slide 126 along the guide plate 125; the top block 1261 on the slide 126 pushes the arc-shaped guide plate 1221 on the assembly bracket 122 through its rollers, overcoming the elastic force of the elastic reset member 1223, and pushing the assembly bracket 122 and the connecting sleeve 123 fixed thereto to move along the guide rod 1222 towards the furnace; the connecting sleeve 123 drives the clamped docking rod 55 to move synchronously through the locking rod 124 and the clamping part, and the reciprocating sliding of the slide 126 is converted into the reciprocating motion of the connecting sleeve 123 along its axial direction through the transmission of the top block 1261, the arc-shaped guide plate 1221 and the assembly bracket 122; the connecting sleeve 123 drives the locking rod 124 and clamping part to move the docking rod 55 back and forth synchronously, thereby causing the spacer bracket 54 with docking rod 55 to move horizontally in a reciprocating manner with the adjacent bracket 54. This reciprocating misalignment between the adjacent brackets 54 causes the head of the fastener mounted on it to be driven by periodic frictional force, thereby causing it to slowly rotate around its own axis. The rotation of the fastener causes its nut part and head parts to be evenly exposed to the heat radiation and atmosphere in the furnace, eliminating the dead angle of heating, effectively avoiding the problems of local shading and uneven heating caused by the fixed contact surface in the traditional suspension method, greatly improving the uniformity of quenching heating, ensuring the overall hardness of the fastener is consistent, and ensuring the processing quality stability of automotive fasteners. After heating is completed, the operator rotates the locking rod 124 in the opposite direction. Through the meshing of the drive gear and the gear ring, the angle between the movable clamping part 1272 and the fixed clamping part 1271 increases, and the clamping surfaces of the two move away from each other, releasing the bent part of the docking rod 55 and completing the unlocking of the fastener bracket 5 and the furnace door 12. When the furnace door 12 is opened, the lower conveying trolley 3 and the upper conveying trolley 4 work together to transport the fastener bracket 5 from the front of the furnace door 12 to the top of the quenching medium tank 6. Through the lifting rings 58 and the hanging frame, the fastener bracket 5 is steadily lifted into the quenching medium tank 6 for quenching and cooling. The lifting rings 58 are symmetrically distributed at the four corners of the fastener bracket 5 to ensure that the bracket remains horizontal during the lifting and liquid entry process, the fastener is vertically inserted into the liquid, the nut part is cooled evenly in all directions, and will not slip or collide with each other due to tilting. After quenching is completed, the fastener hanger 5 is lifted out of the quenching medium tank 6, the processed fastener is removed, and a complete work cycle is completed. This invention achieves adaptive loading of fasteners by relying on their own weight through the cooperation of multiple rows and layers of support rods 53 and the arc-shaped guide part at the end of the support rods 53. Each fastener is suspended independently and does not stack with each other, which solves the problems of uneven heating and mutual collision damage caused by traditional bulk loading methods.

[0036] The docking traction locking mechanism has dual functions of traction drive and furnace spin drive. During the heating process, the same drive motor 121 and transmission mechanism are used to make the spacer bracket 54 reciprocate horizontally misaligned, driving the fastener to slowly spin around its own axis, so that all parts of the fastener are evenly exposed to the heat radiation and atmosphere in the furnace, eliminating the dead zone of heating, and significantly improving the heating uniformity and the consistency of the structure.

[0037] This invention achieves single-piece separate loading, automated conveying, in-furnace spin heating and vertical quenching cooling of fasteners in a compact structural layout, effectively avoiding hardness differences caused by uneven heating and ensuring the overall processing quality stability of automotive fasteners.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A quenching device for processing automotive fasteners, comprising a guide rail (2) and a quenching furnace body (1) disposed at both ends of the guide rail (2) and a quenching medium tank (6) for quenching fasteners, wherein a furnace door (12) is hinged to the side of the quenching furnace body (1). Its features are, Also includes: The fastener bracket (5) is movable along the guide rail (2). The fastener bracket (5) is provided with a bearing part for bearing the head of the fastener and causing the fastener nut part to hang down due to gravity, and at least one connecting rod (55). A docking traction locking mechanism is installed on the furnace door (12), and the docking traction locking mechanism includes: The connecting sleeve (123) is movable along its own axis and passes through the furnace door (12). The locking rod (124) is rotatably disposed in the connecting sleeve (123), and its end located in the furnace is provided with a fixed clamping part (1271) and a movable clamping part (1272) for clamping the end of the docking rod (55) in the locked state; In addition, a locking drive mechanism is connected to the connecting sleeve (123) for driving the connecting sleeve (123) to reciprocate along its axial direction, thereby driving the bearing part of the fastener bracket (5) to move closer to or away from the furnace door (12) through the clamped docking rod (55).

2. The quenching device for automotive fastener processing as described in claim 1, characterized in that, The locking drive mechanism includes: Drive motor (121); The crank slide rod (1211) is connected to the output shaft of the drive motor (121) via a transmission connection; The slide (126) is slidably mounted on the guide plate (125) on the furnace door (12) and connected to the crank slide rod (1211) so as to slide back and forth under the drive of the drive motor (121). The slide (126) is provided with a top block (1261) and a roller is installed at the end of the top block (1261). The assembly bracket (122) is fixed on the connecting sleeve (123) and can slide along the guide rod (1222) fixed on the furnace door (12). The assembly bracket (122) is provided with an arc-shaped guide plate (1221) that cooperates with the top block (1261). An elastic reset element (1223) is sleeved on the guide rod (1222) and applies an elastic force toward the furnace door (12) to the mounting bracket (122); When the slide (126) slides back and forth, the top block (1261) pushes the arc-shaped guide plate (1221) through its rollers, causing the assembly bracket (122) and connecting sleeve (123) to overcome the elastic force of the elastic reset member (1223) and move away from the furnace door (12), and is pushed back by the elastic reset member (1223) when the top block (1261) retracts.

3. The quenching device for automotive fastener processing as described in claim 1, characterized in that, The locking rod (124) is installed in the connecting sleeve (123) by bearing, and the fixed clamping part (1271) is fixedly disposed at the end of the locking rod (124) and rotates with the locking rod (124); The locking rod (124) is located inside the furnace and is coaxially fixedly connected to a drive gear at one end; The movable clamping part (1272) is rotatably sleeved on the locking rod (124), and its outer edge is provided with a toothed ring that meshes with the drive gear; When the locking rod (124) rotates, the engagement of the drive gear and the gear ring causes the movable clamping part (1272) to rotate relative to the locking rod (124) and the fixed clamping part (1271), thereby changing the included angle between the movable clamping part (1272) and the fixed clamping part (1271) to clamp or release the end of the docking rod (55).

4. The quenching device for automotive fastener processing as described in claim 1, characterized in that, The bearing portion of the fastener bracket (5) includes: Support frame (51); At least two layers of support rods are spaced apart along the height direction, and each layer of support rods includes multiple support rods (53) arranged in parallel at equal intervals. The bracket (54) is telescopically mounted on the support rod (53), and the end of the support rod (53) has an arc-shaped guide portion that facilitates the sliding of fasteners. Among them, the brackets (54) of each pair of adjacent brackets in each bracket group are used to support the head of the fastener. The space between the brackets (54) allows the nut part of the fastener to pass freely, so that the fastener can adjust its posture by its own gravity as it slides in along the arc-shaped guide part until the head is mounted on the bracket and the nut part hangs down through the gap between the brackets. The connecting rod (55) is located below the bracket (54) and has a bent portion at its end, which is clamped between the fixed clamping portion (1271) and the movable clamping portion (1272).

5. A quenching device for automotive fastener processing as described in claim 4, characterized in that, The number of the docking rods (55) is multiple, and they correspond one-to-one with the positions of the brackets (54) that are spaced apart in each layer of the support rod group. The furnace door (12) is provided with multiple docking traction locking mechanisms.

6. The quenching device for automotive fastener processing as described in claim 4, characterized in that, The support frame (51) is provided with several plug-in plates (52), and the plug-in plates (52) are provided with strip-shaped plug-in slots. The support rod (53) is inserted through the strip-shaped plug-in slots. Several of the aforementioned support rods (53) are fitted with mutually abutting eccentric abutting pieces (531) on the outer section of the support frame (51) on the other side. The end shaft of the eccentric abutting piece (531) is connected to a synchronous hanging ring (532), and a synchronous rod (57) passes through all the synchronous hanging rings (532) to make each eccentric abutting piece (531) rotate synchronously.

7. A quenching device for automotive fastener processing as described in claim 6, characterized in that, A retractable adjusting rod (56) is fixed on the support frame (51) at the position corresponding to the eccentric abutment (531). The end of the adjusting rod (56) is equipped with a stop wheel, which abuts against the eccentric side of one of the eccentric abutment pieces (531); By adjusting the extension and retraction of the adjusting rod (56), the eccentric abutment (531) can be driven to rotate, and then all the eccentric abutments (531) can be driven to rotate synchronously through the synchronizing rod (57), so as to achieve fine adjustment of the spacing between each support rod (53).

8. The quenching device for automotive fastener processing as described in claim 1, characterized in that, The guide rail (2) is C-shaped. A lower conveying trolley (3) is movably installed on the guide rail (2) along the first horizontal direction. An upper conveying trolley (4) for carrying the fastener bracket (5) is movably installed on the lower conveying trolley (3) along the second horizontal direction. The quenching furnace body (1) and the quenching medium tank (6) are both equipped with tracks on the same horizontal plane as the lower conveying trolley (3); The fastener bracket (5) also includes four lifting rings (58) for lifting the fastener bracket (5) as a whole into the quenching medium tank (6) via the hanging bracket.

9. A quenching device for automotive fastener processing as described in claim 1, characterized in that, It also includes an electrical control box (11), which is installed on the outer wall of the quenching furnace body (1) or on the furnace door (12) and is electrically connected to the sensor inside the quenching furnace body (1) to monitor the working status inside the furnace body.

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