A push disc type heating furnace for heat treatment of a knuckle

Abstract

This application relates to the field of heating furnace technology for heat treatment, and discloses a pusher-type heating furnace for heat treatment of steering knuckles, comprising four heat treatment channels forming a rectangle, four pushing devices for pushing workpieces into different heat treatment channels, a quenching pool and a quenching cage for quenching workpieces, and a mobile loading device; the two adjacent heat treatment channels of the quenching pool are respectively set as heating channels and tempering channels, and the heating channels and tempering channels are respectively set with seven heating temperature zones and six tempering temperature zones; two opposing internal toothed chains are arranged in the heat treatment channels, and the top of the two internal toothed chains is set with a tray for carrying workpieces. This invention achieves an automatic integrated heat treatment effect for steering knuckles from transportation, heating, quenching, tempering to cooling through the cooperation of four heat treatment channels, four pushing devices, quenching pool, mobile loading device, and internal toothed chains, reducing labor input costs and improving the heat treatment efficiency of steering knuckles.

Description

Technical Field

[0001] This application relates to the field of heating furnaces for heat treatment, and more particularly to a pusher-type heating furnace for heat treatment of steering knuckles. Background Technology

[0002] The steering knuckle is a crucial component of the automotive steering axle. During vehicle operation, it constantly withstands varying impact loads from the road surface. This necessitates that the steering knuckle possess high strength, toughness, and excellent wear resistance to ensure driving safety and handling stability. Heat treatment plays a key role in enhancing the performance of the steering knuckle. Appropriate heat treatment processes, such as quenching and tempering, can significantly improve the internal structure of the steering knuckle, enhancing its overall strength, hardness, toughness, and wear resistance.

[0003] During the heat treatment of steering knuckles, the process involves loading, transportation, heating, quenching, tempering, cooling, and unloading. To improve the continuous production capacity and product quality of steering knuckles during heat treatment, each step must cooperate with the others. Errors in any step can lead to serious problems in the entire heat treatment process. In factories with low automation, multiple people are still assigned to manage different processes. Although this can effectively reduce manufacturing costs, the problems of inconsistent product quality and low production efficiency caused by manual operation are unavoidable.

[0004] Traditional steering knuckle heat treatment largely relies on manual experience to heat the steering knuckle. Manual operation is greatly affected by factors such as worker skill level, work status, and mood. Given the multiple concave and anisotropic structures on the surface of the steering knuckle, it is difficult to achieve comprehensive and uniform heating of the steering knuckle from multiple angles as it is gradually heated. This can easily lead to inconsistencies in the quality of multiple steering knuckles after heat treatment. Furthermore, employing multiple people to operate the heat treatment at different stages can increase labor costs and affect the factory's profits. Summary of the Invention

[0005] This application proposes a pusher-type heating furnace for heat treatment of steering knuckles, which has the advantages of automatic integration of transportation, heating, quenching, tempering and cooling. It solves the problem that manual operation makes it difficult to achieve continuous and uniform heating of the steering knuckle from multiple angles when the steering knuckle is gradually heated, which can lead to inconsistent quality and low production efficiency among multiple steering knuckles after heat treatment.

[0006] To achieve the above objectives, this application adopts the following technical solution: a pusher-type heating furnace for heat treatment of steering knuckles, comprising four heat treatment channels forming a rectangle, four pushing devices for pushing workpieces into different heat treatment channels, a quenching pool and a quenching cage for quenching workpieces, and a moving loading device.

[0007] The two adjacent heat treatment channels of the quenching pool are respectively set as a heating channel and a tempering channel, and heating devices are provided in different temperature zones within the heating channel and the tempering channel.

[0008] The heat treatment channel is provided with two opposing internal toothed chains, and the top of the two internal toothed chains is provided with a tray to support the workpiece.

[0009] Furthermore, a grid plate is provided directly above the tray, and two symmetrical support frames are fixedly connected between the grid plate and the tray.

[0010] Furthermore, the heating device includes four arc-shaped flame plates symmetrically arranged on the left and right sides of the grid plate, and the four flame plates are symmetrical vertically. Each flame plate has a cavity for accommodating combustible gas and is connected to an external gas supply system through a high-temperature resistant pipe. The two arc-shaped flame plates on the same side are rotatably connected to a fixing block at both ends, and one end of the fixing block is fixedly connected to the inner wall of the heat treatment channel. The arc-shaped surfaces of the four arc-shaped flame plates opposite to one side of the heat treatment channel have limit grooves, and sliders are slidably connected in the limit grooves. The sliders are rotatably connected to a connecting block opposite to one side of the heat treatment channel. The end of the connecting block away from the slider is rotatably connected to a sliding rod. The four sliding rods pass through and connect to both sides of the heat treatment channel. The ends of two adjacent sliding rods away from the heat treatment channel are fixedly connected to a connecting plate. The ends of the two sliding rods extending outside the heat treatment channel are each fitted with a spring. The two ends of the springs are fixedly connected to the connecting plate and the heat treatment channel, respectively. The heat treatment channel is provided with a reciprocating mechanism for reciprocatingly pushing the connecting plate near the connecting plate.

[0011] Furthermore, the reciprocating mechanism includes two fixed rods fixedly connected to the side wall of the heat treatment channel, and a sliding plate is installed on the two fixed rods. A first motor is fixedly connected to the side of the sliding plate opposite to the heat treatment channel. A cam is fixedly connected to the output shaft of the first motor, and the cam abuts against the surface of the connecting plate.

[0012] Furthermore, the ends of the two fixed rods away from the heat treatment channel are jointly fixedly connected to a base, and a first electric push rod is fixedly connected to the base. The output shaft of the first electric push rod is fixedly connected to the surface of the sliding plate, and the sliding plate and the fixed rod are connected through each other and slidably connected to each other.

[0013] Furthermore, the top of the grid plate is equipped with multiple serrated support strips, which intersect perpendicularly with the direction of the strip-shaped through grooves in the grid plate, and the direction of the strip-shaped through grooves in the grid plate is parallel to the direction of the flame-spraying slot of the arc-shaped flame-spraying plate.

[0014] Furthermore, the surface of the serrated support strip is set as a polished mirror, and the serrated support strip is installed to the grid plate by plugging.

[0015] Furthermore, the center of the tray is provided with a bucket-shaped groove and an installation groove, and the installation groove is connected to the bucket-shaped groove. A rotating block is rotatably connected in the installation groove, and the rotating block is fitted and sealed with the installation groove. A baffle is fixedly connected to one end of the rotating block relative to the bucket-shaped groove, and the baffle is sealed with the bucket-shaped groove. A torsion spring is provided between the rotating block and the installation groove.

[0016] Furthermore, a flow-dispersing device is provided at the top of multiple temperature zones within the heating and tempering channels. The flow-dispersing device includes multiple second motors installed at the top of different temperature zones. The bottom of the second motors and the top of the heat treatment channel are fixedly connected to multiple first support columns. The output shaft of the second motors is fixedly connected to a rotating rod. The bottom end of the rotating rod penetrates the top of the heat treatment channel and extends downward to directly above the grid plate. Multiple fan blades are fixedly connected to the end of the rotating rod extending into the heat treatment channel. A flow guide is fitted on the outside of the fan blades, and the fan blades are located in the middle of the flow guide. The top of the flow guide and the top of the inner wall of the heat treatment channel are fixedly connected to multiple second support columns.

[0017] Furthermore, the diameter of the middle part of the flow guide is smaller than the diameter of the two ends, and forms an arc-shaped surface with the two ends.

[0018] The beneficial effects of this invention are as follows:

[0019] 1. This invention achieves automated integrated heat treatment of steering knuckles from transportation, heating, quenching, tempering to cooling through the cooperation of four heat treatment channels, four pushing devices, a quenching pool, a mobile loading system, and an internal gear chain. This reduces labor input costs and improves the heat treatment efficiency of steering knuckles. Only one employee is needed to participate in the relatively simple loading and unloading process. After overall equipment debugging, the heating and tempering channels can heat and temper the workpiece more evenly and quickly, improving the quality of the steering knuckles during heat treatment. This solves the problem in the background technology where traditional manual operation faces multiple concave and anisotropic structures on the surface of the steering knuckle, making it difficult to continuously and evenly heat the steering knuckle from multiple angles as it is gradually heated, which easily leads to inconsistent quality and low production efficiency among multiple steering knuckles after heat treatment.

[0020] 2. This invention involves setting a grid plate above the tray. Utilizing the structural features of the grid plate's multiple strip-shaped slots, the contact area between the workpiece and the support surface can be reduced, increasing the workpiece's heating area. Simultaneously, it facilitates comprehensive heat flow around the upper and lower surfaces of the workpiece, significantly improving heating efficiency. Furthermore, by installing multiple serrated support strips on top of the grid plate, the contact area with the workpiece can be further reduced, thereby enhancing heating efficiency. The serrated support strips are installed at an angle perpendicular to the direction of the strip-shaped slots. This allows the flame to quickly pass between two serrated support strips when the arc-shaped flame plate heats the grid plate and workpiece, heating the bottom of the workpiece. Combined with the strip-shaped slots at the bottom of the grid plate, this further enhances the heating effect on the bottom of the workpiece.

[0021] 3. This invention uses four symmetrically distributed arc-shaped flame plates to simultaneously heat both the upper and lower surfaces of a workpiece. This symmetrical arc-shaped arrangement ensures more uniform and faster heating. Furthermore, a reciprocating mechanism drives the connecting plate to move back and forth, which in turn moves the sliding rod synchronously, causing the connecting block and the slider to move accordingly. The slider, guided by the upper limit groove of the arc-shaped flame plate, causes the arc-shaped flame plate to oscillate back and forth under the rotational limit of the fixed block, thereby changing the flame angle and area, improving the heating effect on the workpiece, and ultimately enhancing the heat treatment efficiency of the equipment.

[0022] 4. This invention uses the rotation of a second motor to drive multiple fan blades to rotate rapidly, thereby creating a disruptive hot airflow within the original temperature zone. This causes the hot airflow to be drawn away above the workpiece, then enters the bottom of the guide shroud, and is discharged from the top of the guide shroud. The discharged airflow impacts the top of the inner wall of the heat treatment channel, then moves downward along the inner wall of the heat treatment channel and returns to the vicinity of the workpiece. By utilizing the guiding flow of the airflow, some of the hot airflow will continuously flow upward from the bottom of the workpiece, thereby increasing the heated area of ​​the workpiece, improving the uniformity of heating, and assisting the two arc-shaped flame plates on both sides to perform deep heating treatment on the holes or gaps on the surface of the workpiece that are difficult to be directly heated by flame. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort:

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2This is a schematic diagram of the overall internal structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the overall planar structure of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of the tray and the internal toothed chain in this invention;

[0028] Figure 5 This is a schematic diagram of the structure of the pusher, quenching tank and moving loading point in this invention;

[0029] Figure 6 This is a schematic diagram of the structure of the fixing base and the insert plate in this invention;

[0030] Figure 7 This is a three-dimensional structural diagram of one end of the heat treatment channel in this invention;

[0031] Figure 8 This is a schematic diagram of the planar structure of one end of the heat treatment channel in this invention;

[0032] Figure 9 This is a schematic diagram of the structure within a single temperature zone of the heat treatment channel in this invention;

[0033] Figure 10 This is a schematic diagram of the structure of the sliding plate and the connecting plate in this invention;

[0034] Figure 11 This is a schematic diagram of the turbulence-disrupting device in this invention;

[0035] Figure 12 This is a schematic diagram of the structure of the tray and baffle in this invention.

[0036] In the diagram: 1. Heat treatment channel; 2. Sealing plate; 21. Connecting frame; 22. Sixth electric push rod; 3. Pushing device; 31. Base; 32. Fifth electric push rod; 33. Push block; 4. Quenching tank; 41. Second electric push rod; 42. Quenching cage; 5. Moving loading; 51. Fourth electric push rod; 52. Fixed base; 53. Third electric push rod; 54. Insert plate; 6. Internal gear chain; 61. Gear; 62. Connecting rod; 63. Circular support block; 64. Limiting guide rail; 65. Third motor; 7. Tray; 71. Baffle; 72. Rotating block 73. Torsion spring; 74. Support frame; 75. Grid plate; 76. Serrated support bar; 8. Heating device; 81. Arc-shaped flame plate; 82. Fixing block; 83. Sliding block; 831. Connecting block; 832. Sliding rod; 833. Connecting plate; 834. Spring; 84. Fixing rod; 85. Base; 86. First electric push rod; 87. Sliding plate; 88. First motor; 89. Cam; 9. Baffle device; 91. Second motor; 911. First support column; 92. Rotating rod; 93. Fan blade; 94. Flow guide; 941. Second support column. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Example 1

[0039] like Figure 1-6 As shown, a pusher-type heating furnace for heat treatment of steering knuckles includes four heat treatment channels 1 forming a rectangle, four pushing devices 3 for pushing workpieces into different heat treatment channels 1, a quenching pool 4 and a quenching cage 42 for quenching workpieces, and a moving loading device 5.

[0040] The two adjacent heat treatment channels 1 of the quenching pool 4 are respectively set as heating channel and tempering channel, and heating devices 8 are provided in different temperature zones in the heating channel and tempering channel.

[0041] The heating channel and the tempering channel are respectively equipped with seven heating temperature zones and six tempering temperature zones;

[0042] Two opposing internal toothed chains 6 are provided in the heat treatment channel 1, and a workpiece bearing tray 7 is provided on the top of the two internal toothed chains 6.

[0043] The heating channel and tempering channel are respectively provided with seven heating temperature zones and six tempering temperature zones. Each temperature zone is provided with a sealing plate 2 on both sides. The sealing plate 2 passes through the top of the heat treatment channel 1 and abuts against the connecting ends of the corresponding two trays 7. The tops of multiple sealing plates 2 are fixedly connected to a connecting frame 21. A sixth electric push rod 22 is fixedly connected to the side wall of the heat treatment channel 1. The output axis of the sixth electric push rod 22 is set upward and fixedly connected to one end of the connecting frame 21.

[0044] The pushing device 3 includes a platform 31 set at two adjacent heat treatment channels 1. A fifth electric push rod 32 is fixedly connected to the platform 31. A push block 33 is fixedly connected to the fifth electric push rod 32 near the heat treatment channel 1. The push block 33 passes through the heat treatment channel 1 and is adapted to the height of the tray 7. When the pushing device 3 is started, the heating device 8 at the corresponding tray 7 will stop heating.

[0045] Two symmetrical limiting guide rails 64 are fixedly connected to the inner wall of the heat treatment channel 1 to support and limit the internal gear chain 6. The internal gear chain 6 is slidably connected to the limiting guide rails 64. The internal teeth at both ends of the internal gear chain 6 are meshed with two gears 61. A connecting rod 62 is fixedly connected through the common center of the two gears 61. Both ends of the connecting rod 62 are rotatably connected to the limiting guide rails 64, and one end of the connecting rod passes through the limiting guide rails 64. Multiple circular support blocks 63 are slidably connected inside the internal gear chain 6, and the circular support blocks 63 are fixedly connected to the inner wall of the limiting guide rails 64. Two third motors 65 are also installed on the outer wall of the heat treatment channel 1. The output shafts of the two third motors 65 are respectively fixedly connected to one end of the two connecting rods 62 that extend through to the outside of the limiting guide rail 64. With the above settings, when the internal gear chain 6 needs to move, it is only necessary to control the output shafts of the two third motors 65 to rotate synchronously, thereby driving the two gears 61 to rotate synchronously in the limiting guide rail 64 through the connecting rods 62, thereby driving the internal gear chain 6 that meshes with it to rotate within the limiting guide rail 64, thereby driving the pallet 7 and workpiece placed on top to move. During this process, multiple circular support blocks 63 can provide a stable support effect for the internal gear chain 6.

[0046] A second electric push rod 41 is fixedly installed on the top of the quenching pool 4. The output shaft of the second electric push rod 41 passes through the top of the quenching pool 4 and is fixedly connected to the top of the quenching cage 42. By controlling the second electric push rod 41, the quenching cage 42 is automatically lifted and lowered, thereby driving the tray 7 and the workpiece into the quenching medium in the quenching pool 4 for quenching and cooling.

[0047] The mobile loading unit 5 includes a plate 54, a fixed base 52, a third electric push rod 53, and a fourth electric push rod 51. The fixed base 52 has a limiting groove on one side opposite the quenching tank 4. The plate 54 is slidably connected within the limiting groove. The third electric push rod 53 is fixedly connected to the top of the limiting groove. The fourth electric push rod 51 is fixedly connected to the side of the fixed base 52 opposite to the quenching tank 4. When quenching of the workpiece in the tray 7 is required, the output shaft of the fourth electric push rod 51 pushes the fixed base 52 and the plate 54 to insert between the two internal gear chains 6, subsequently controlling the third electric push rod 51... 3. The output shaft drives the insert plate 54 to move upward within the limiting groove, lifting the tray and disengaging it from the upper surface of the corresponding internal gear chain 6. Then, the fourth electric push rod 51 drives the tray 7 to retract. During this process, when the tray 7 enters the quenching cage 42, the output shaft of the third electric push rod 53 drives the tray 7 to move downward, so that the tray 7 can be stably placed in the quenching cage 42. Finally, the fourth electric push rod 51 is controlled to drive the insert plate 54 to completely exit the lifting range of the quenching cage 42, so that the quenching cage 42 can drive the tray 7 and the workpiece to quench and cool down in the quenching pool 4.

[0048] The heat treatment channel 1 connected to the tempering channel is set as a cooling channel, and the upper cover of the cooling channel is only half the length of the tempering channel. The loading port and unloading port are set at the missing part of the upper cover of the cooling channel to facilitate the loading and unloading of workpieces.

[0049] The aforementioned internal toothed chain 6 can also be replaced with a high-speed chain made of high-temperature resistant material or other replaceable high-temperature resistant chains, such as an internal toothed belt woven from high-temperature alloy fiber material, which can meet the requirements of high temperature resistance and perform flexible movement at a certain angle. This is common knowledge to those skilled in the art and will not be elaborated on here.

[0050] The heat treatment process includes the following steps:

[0051] S1. Preheat each temperature zone of the heating channel and tempering channel so that the workpiece can be quickly heated when the tray 7 moves into the designated temperature zone, thereby improving the heat treatment efficiency.

[0052] S2. Place the workpiece that needs to be heat-treated on the tray 7 at the top of the corresponding drive chain through the feed port, and use the internal toothed chain 6 to drive the tray 7 to move, so as to achieve the effect of continuous feeding.

[0053] S3. The internal toothed chain 6 is controlled by an external controller to drive the tray 7 to move intermittently, so that the tray 7 can stay and move better in different heating temperature zones and tempering temperature zones.

[0054] S4. Start all pushing devices 3 and wait for the command to push the tray 7 at the end of the corresponding internal toothed chain 6 to the top of the internal toothed chain 6 in the next heat treatment channel 1. At this time, the pushing device 3 will be indirectly triggered by the movement of the internal toothed chain 6 in conjunction with the external controller, so as to push the tray 7 to the designated position, so that the tray 7 flows in different heat treatment channels 1 and performs heat treatment operations in sequence, thereby connecting multiple heat treatment channels 1 together with the internal toothed chain 6, and thus forming a complete automated heat treatment system.

[0055] S5. Start the moving load 5 to lift the tray 7, which has finished heating at the end of the heating channel, away from the internal toothed chain 6 and send it into the quenching cage 42. By utilizing the characteristic that the end of the moving load 5 can move back and forth and up and down, the workpiece tray 7 that needs to be quenched can be quickly lifted, so that it is separated from the internal toothed chain 6 and enters the quenching cage 42 to wait for quenching, thus achieving the automation effect of heating and quenching.

[0056] S6. Control the quenching cage 42 to drive the tray 7 to descend into the quenching medium in the quenching pool 4 for quenching. The output shaft of the second electric push rod 41 drives the quenching cage 42 to automatically lift and lower, completing the automated quenching process of the workpiece in the tray 7.

[0057] S7. The moving loading 5 lifts the quenched pallet 7 to the designated position, and with the cooperation of the corresponding pushing device 3, sends the pallet 7 into the top of the internal tooth chain 6 in the tempering channel for tempering. Through the cooperation of the moving loading 5 and the corresponding pushing device 3, the quenched workpiece pallet 7 is successfully pushed into the tempering channel for tempering, achieving the automation effect of heating, quenching and tempering, and improving the heat treatment efficiency of the workpiece.

[0058] S8. The tray 7 after tempering is pushed into the cooling channel again by the corresponding pushing device 3 for cooling. The workpiece after tempering is pushed into the cooling channel again by the corresponding pushing device 3 for cooling. The heat treatment channel 1 and the pushing device 3 are used to reconnect tempering and cooling, forming an automated heat treatment system of loading, heating, quenching, tempering, cooling and unloading, which greatly enhances the heat treatment efficiency of the workpiece.

[0059] S9. Collect the cooled workpieces and replenish the new workpieces to be heat-treated. This reduces personnel input, as only loading and unloading are required. This not only reduces labor costs but also reduces the chance of the workpiece heat treatment quality being affected by improper operation due to subjective factors, thereby improving the product qualification rate.

[0060] Example 2

[0061] This embodiment further supplements Embodiment 1, such as... Figure 6-12 As shown, a grid plate 75 is provided directly above the tray 7. Two symmetrical support frames 74 are fixedly connected between the grid plate 75 and the tray 7. The grid plate 75 has multiple strip slots, which can reduce the contact area between the workpiece and the surface of the grid plate 75, increase the heating area of ​​the workpiece, and facilitate the heat flow to fully surround and heat the upper and lower surfaces of the workpiece, thus greatly improving the heating efficiency of the workpiece.

[0062] The heating device 8 includes four arc-shaped flame plates 81 symmetrically arranged on the left and right sides of the grid plate 75, with the four flame plates being vertically symmetrical. Each flame plate has a cavity for accommodating combustible gas and is connected to an external gas supply system through a high-temperature resistant pipe. Two arc-shaped flame plates 81 on the same side are rotatably connected to fixed blocks 82 at both ends, and one end of the fixed block 82 is fixedly connected to the inner wall of the heat treatment channel 1. The four arc-shaped flame plates 81 have limit grooves on their arc-shaped surfaces relative to one side of the heat treatment channel 1, and sliders 83 are slidably connected within the limit grooves. The sliders 83 rotate relative to one side of the heat treatment channel 1. A connecting block 831 is connected, and a slide rod 832 is rotatably connected to the end of the connecting block 831 away from the slider 83. Four slide rods 832 pass through and connect both sides of the heat treatment channel 1. The ends of two adjacent slide rods 832 away from the heat treatment channel 1 are fixedly connected to a connecting plate 833. Springs 834 are sleeved on the ends of the two slide rods 832 that extend outside the heat treatment channel 1. The two ends of the springs 834 are fixedly connected to the connecting plate 833 and the heat treatment channel 1, respectively. A reciprocating mechanism for reciprocatingly pushing the connecting plate 833 is provided near the connecting plate 833 in the heat treatment channel 1. Different numbers and temperatures are set within the heating and tempering channels to achieve a gradual heating effect. When the workpiece on the tray 7 is distributed and placed in different temperature zones within the heating and tempering channels, the corresponding heating devices 8 in each zone heat the workpiece. During this process, four arc-shaped flame plates 81, connected to the external gas supply system, are ignited and then spray flames onto the workpiece surface through the flame nozzles for heating. Because the four arc-shaped flame plates 81 are symmetrically distributed, they can simultaneously heat both the upper and lower surfaces of the workpiece. This symmetrical arc-shaped arrangement allows for… The workpiece is heated more evenly and the heating efficiency is faster. On this basis, the reciprocating mechanism pushes the connecting plate 833 to move back and forth, which in turn pushes the slide bar 832 to move synchronously, causing the connecting block 831 and the slider 83 to move accordingly. The slider 83 will be guided by the upper limit groove of the arc-shaped flame plate 81, which will cause the arc-shaped flame plate 81 to swing back and forth under the rotation limit of the fixed block 82, thereby changing the flame angle and flame area of ​​the flame plate, so that the flame can better cover the upper and lower surfaces of the workpiece, improve the uniformity of the workpiece heating, and thus enhance the heat treatment efficiency of the equipment.

[0063] The reciprocating mechanism includes two fixed rods 84 fixedly connected to the side wall of the heat treatment channel 1. Sliding plates 87 are installed on the two fixed rods 84. A first motor 88 is fixedly connected to the side of the sliding plate 87 opposite to the heat treatment channel 1. A cam 89 is fixedly connected to the output shaft of the first motor 88, and the cam 89 abuts against the surface of the connecting plate 833. The first motor 88 in the reciprocating mechanism drives the cam 89 to rotate. The rotating cam 89 will continuously abut against and push the connecting plate 833 to move back and forth, thereby driving the sliding rod 832, the connecting block 831, and the slider 83 to move in linkage. Then, the reciprocating movement of the slider 83 enables the corresponding two arc-shaped flame plates 81 to automatically reciprocate flame, increasing the flame area and improving the uniformity of workpiece heating.

[0064] Two fixed rods 84 are fixedly connected to a base 85 at their ends away from the heat treatment channel 1. A first electric push rod 86 is fixedly connected to the base 85. The output shaft of the first electric push rod 86 is fixedly connected to the surface of the sliding plate 87. The sliding plate 87 is connected through the fixed rods 84 and is slidably connected to them. By using the first electric push rod 86, the sliding plate 87 can be controlled to move left and right on the two fixed rods 84 by the extension and retraction of its output shaft. This controls the movement of the first motor 88, thereby changing the relative position of the cam 89 and the connecting plate 833. This allows for free adjustment of the distance that the cam 89 pushes against the connecting plate 833 during rotation, thereby adjusting the angle of the reciprocating flame of the arc-shaped flame-spraying plate 81. The heating angle can be better adjusted according to the shape and size of the workpiece, improving the heating effect of the workpiece.

[0065] The heating and tempering channels are equipped with multiple flow-dispersing devices 9 at the top of the various temperature zones. Each flow-dispersing device 9 includes multiple second motors 91 positioned at the top of different temperature zones. The bottom of each second motor 91 is fixedly connected to multiple first support columns 911 at the top of the heat treatment channel 1. A rotating rod 92 is fixedly connected to the output shaft of each second motor 91. The bottom end of the rotating rod 92 penetrates the top of the heat treatment channel 1 and extends downwards to directly above the grid plate 75. Multiple fan blades 93 are fixedly connected to the end of the rotating rod 92 extending into the heat treatment channel 1. A flow guide shroud 94 is fitted around the fan blades 93, with the fan blades located in the middle of the flow guide shroud 94. Multiple second support columns 941 are fixedly connected to the top of the flow guide shroud 94 and the top of the inner wall of the heat treatment channel 1. The rotation of the second motors 91 drives the multiple fan blades 93 to rotate rapidly, thereby disrupting the original hot airflow within the temperature zones. This causes the hot airflow to be drawn away above the workpiece, then enters the bottom of the flow guide shroud 94, and finally exits from the top of the flow guide shroud 94. The exhaust airflow impacts the top of the inner wall of the heat treatment channel 1, then moves downwards along the inner wall and returns to the vicinity of the workpiece. This airflow guides the flow, allowing some heat to continuously flow upwards from the bottom of the workpiece, thus increasing the heated area and improving heating uniformity. The curved flame plates 81 on both sides also provide deeper heating to holes or gaps on the workpiece surface that are difficult to heat directly. Multiple second support columns 941 connect the flow guide shroud 94 to the heat treatment channel 1, providing support for the flow guide shroud 94. The space left allows the hot airflow, after being swept up by the fan blades 93, to quickly pass through the top and bottom of the flow guide shroud 94 and return to the vicinity of the workpiece, enhancing heating uniformity and improving heating efficiency. The shape of the flow guide shroud 94 itself improves the circulation of hot airflow when the fan blades 93 rotate, further enhancing the heating effect on the workpiece and improving the heat treatment efficiency of the equipment.

[0066] The diameter of the middle part of the flow guide shroud 94 is smaller than the diameters of the two ends, and it forms an arc-shaped surface with the two ends. By setting the diameter of the middle part of the flow guide shroud 94 to be smaller than the diameters of the two ends, and forming an arc-shaped surface as a whole, the efficiency of airflow entering and exiting when passing through the two ends of the flow guide shroud 94 can be effectively improved, thereby enhancing the turbulence effect of the fan blade 93 on the hot airflow in the heat treatment channel 1, and achieving the effect of enhancing the heating effect on the workpiece after the heat flow disturbance.

[0067] Example 3

[0068] This embodiment further supplements Embodiment 1, such as... Figure 6 , Figure 9 and Figure 12As shown, multiple serrated support bars 76 are installed on the top of the grid plate 75. The serrated support bars 76 intersect perpendicularly with the direction of the strip groove inside the grid plate 75. The strip groove is parallel to the direction of the flame outlet of the arc-shaped flame plate 81. By installing multiple serrated support bars 76 on the top of the grid plate 75, the contact area with the workpiece can be further reduced, thereby improving the heating efficiency of the workpiece. At the same time, it is also beneficial to avoid the problem of uneven heating of the workpiece surface. The installation angle perpendicular to the direction of the strip groove allows the flame to pass quickly between two serrated support bars 76 when the arc-shaped flame plate 81 heats the grid plate 75 and the workpiece, heating the bottom of the workpiece. Combined with the strip groove at the bottom of the grid plate 75, the heating effect on the bottom of the workpiece is further improved.

[0069] The serrated support strip 76 has a polished mirror surface. The serrated support strip 76 is installed in a plug-in manner with the grid plate 75. By polishing the surface of the serrated support strip 76 to a mirror surface, heat and light energy can be refracted to form heat radiation. Heat radiation heats the small holes and gaps on the surface of the workpiece, improving the overall heating effect of the workpiece. The plug-in method between the serrated support strip 76 and the grid plate 75 allows for quick replacement and installation when impurities adhere to the polished mirror surface of the serrated support strip 76 during long-term use and affect the mirror refraction.

[0070] The tray 7 has a bucket-shaped groove and an installation groove at its center, with the installation groove connected to the bucket-shaped groove. A rotating block 72 is rotatably connected inside the installation groove, and the rotating block 72 is fitted and sealed to the installation groove. A baffle 71 is fixedly connected to one end of the rotating block 72 opposite to the bucket-shaped groove, and the baffle 71 is sealed to the bucket-shaped groove. A torsion spring 73 is provided between the rotating block 72 and the installation groove. The rotating block 72 connected by the torsion spring 73 drives the baffle 71 to move into the quenching medium in the quenching tank 4 along with the quenching cage 42. The upward thrust of water pressure on baffle 71 causes it to briefly flip upward and detach from the trough, creating a gap. This allows the medium to quickly submerge tray 7 and cool and quench the workpiece on tray 7. This reduces the resistance between tray 7 and the quenching medium during descent, improving quenching efficiency and achieving rapid quenching to enhance the quenching effect. Meanwhile, torsion spring 73 is temporarily compressed when baffle 71 moves downward and pushes the stop block to fall quickly when tray 7 moves upward, sealing tray 7 and preventing any impact on the sealing during subsequent tempering.

[0071] Working Principle: During operation, the heating device 8 first preheats each temperature zone within the heating channel and tempering channel, allowing the workpiece carried by the tray 7 to be rapidly heated upon entering the designated temperature zone, thus improving heat treatment efficiency. Next, the workpiece to be heat-treated is placed on the tray 7 at the top of the corresponding drive chain through the feed inlet. The internal gear chain 6 drives the tray 7 to move, achieving continuous feeding. Then, an external controller controls the internal gear chain 6 to intermittently move the tray 7, allowing it to better stop and move between different heating and tempering temperature zones. Finally, all pushing devices 3 are activated, awaiting commands to push the tray 7 at the end of the corresponding internal gear chain 6 to the next heat treatment stage. At the top of the internal gear chain 6 in channel 1, the pushing device 3 is indirectly triggered by the movement of the internal gear chain 6 in conjunction with the external controller, pushing the tray 7 to the designated position. This allows the tray 7 to circulate in different heat treatment channels 1 for sequential heat treatment operations. In this way, the internal gear chain 6 connects multiple heat treatment channels 1 together, forming a complete automated heat treatment system. The moving load 5 is then activated to lift the tray 7, which has finished heating at the end of the heating channel, away from the internal gear chain 6 and into the quenching cage 42. Utilizing the characteristic that the end plate 54 of the moving load 5 can move back and forth and up and down, the workpiece tray 7 that needs to be quenched can be quickly lifted, detached from the internal gear chain 6, and placed into the quenching cage 42 to await quenching. This process achieves automated heating and quenching. During the process, the output shaft of the second electric push rod 41 drives the quenching cage 42 and the tray 7 to descend into the quenching medium in the quenching tank 4 for quenching. After quenching, the output shaft of the second electric push rod 41 is controlled to drive the quenching cage 42 and the tray 7 to rise to a designated position, completing the automated quenching process of the workpiece in the tray 7. The quenching cage 42 lifts the quenched tray 7 to the designated position, and with the cooperation of the corresponding pushing device 3, the tray 7 is sent into the top of the internal toothed chain 6 in the tempering channel for tempering. Through the cooperation of the moving loading 5 and the corresponding pushing device 3, the quenched workpiece tray 7 is successfully pushed into the tempering channel for tempering, achieving automated heating, quenching, and tempering, and improving the heat resistance of the workpiece. The process efficiency is improved by pushing the tempered workpiece 7 into the cooling channel again via the corresponding pushing device 3 for cooling. The tempered workpiece is then pushed into the cooling channel again via the corresponding pushing device 3 for cooling. The heat treatment channel 1 and the pushing device 3 are used to reconnect the tempering and cooling processes, forming an automated heat treatment system that includes loading, heating, quenching, tempering, cooling, and unloading. This greatly enhances the heat treatment efficiency of the workpiece. The cooled workpiece is collected and new workpieces to be heat treated are replenished, reducing personnel input. Only loading and unloading are required, which not only reduces labor costs but also reduces the probability of the heat treatment quality being affected by improper operation due to subjective factors, thereby improving the product qualification rate.

[0072] Specifically, when the workpieces carried by the tray 7 are distributed and placed in different temperature zones within the heating channel and tempering tube, the corresponding heating devices 8 in each temperature zone will heat the workpieces. During this process, firstly, four arc-shaped flame-spraying plates 81, connected to the external gas supply system, ignite and then spray flames onto the workpiece surface through the flame-spraying nozzles for heating. Since the four arc-shaped flame-spraying plates 81 are symmetrically distributed, they can simultaneously heat both the upper and lower surfaces of the workpiece. This symmetrical arc-shaped arrangement makes the workpiece heating more uniform and faster. Based on this, the first motor 88 in the reciprocating mechanism drives the cam 89 to rotate. The rotating cam 89 continuously pushes the connecting plate 833 to reciprocate, thereby pushing the slide rod 832 to move synchronously, causing the connecting block 831 and the slider 83 to move in tandem. The sliding block 83, guided by the upper limit groove of the arc-shaped flame plate 81, causes the arc-shaped flame plate 81 to reciprocate under the rotation limit of the fixed block 82, thereby changing the flame angle and flame area of ​​the flame plate, so that the flame can better cover the upper and lower surfaces of the workpiece and improve the uniformity of the workpiece heating. In addition, the extension and retraction of the output shaft of the first electric push rod 86 controls the sliding plate 87 to move left and right on the two fixed rods 84, thereby controlling the movement of the first motor 88, thereby changing the relative position of the cam 89 and the connecting plate 833, achieving the effect of freely adjusting the distance of the cam 89 abutting and pushing the connecting plate 833 during the rotation, thereby adjusting the reciprocating flame angle of the arc-shaped flame plate 81, and better adjusting the heating angle according to the shape and size of the workpiece to improve the heating effect of the workpiece.

[0073] At the same time, the rotation of the second motor 91 drives multiple fan blades 93 to rotate rapidly, thereby creating a hot airflow that disturbs the original temperature zone. This causes the hot airflow to be drawn away above the workpiece, then enters the bottom of the guide shroud 94, and is discharged from the top of the guide shroud 94. The discharged airflow impacts the top of the inner wall of the heat treatment channel 1, then moves downward along the inner wall of the heat treatment channel 1 and returns to the vicinity of the workpiece. By utilizing the guiding flow of the airflow, some of the hot airflow will continue to flow upward from the bottom of the workpiece, thereby increasing the heated area of ​​the workpiece and improving the uniformity of heating. This also assists the two arc-shaped flame plates 81 in performing deep heating treatment on the holes or gaps on the surface of the workpiece that are difficult to be directly heated by flame.

[0074] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pusher disc type heating furnace for heat treatment of a knuckle, characterized by, It includes four heat treatment channels (1) forming a rectangle, four pushing devices (3) for pushing workpieces into different heat treatment channels (1), a quenching pool (4) and a quenching cage (42) for quenching workpieces, and a moving loading device (5). The two adjacent heat treatment channels (1) of the quenching pool (4) are respectively set as heating channel and tempering channel, and heating devices (8) are provided in different temperature zones in the heating channel and tempering channel. The heat treatment channel (1) is provided with two opposing internal toothed chains (6), and the top of the two internal toothed chains (6) is provided with a tray (7) for carrying the workpiece. The heating device (8) includes four symmetrically arranged arc-shaped flame plates (81), which are symmetrically arranged vertically. Each flame plate has a cavity for accommodating combustible gas and is connected to an external gas supply system through a high-temperature resistant pipe. The two arc-shaped flame plates (81) on the same side are rotatably connected to a fixing block (82) at both ends, and one end of the fixing block (82) is fixedly connected to the inner wall of the heat treatment channel (1). The four arc-shaped flame plates (81) have a limiting groove on one side of the arc surface of the heat treatment channel (1), and a slider (83) is slidably connected in the limiting groove. The slider (83) is rotatably connected to a connecting block (831) on one side of the heat treatment channel (1). The connecting block (831) is rotatably connected to a slide rod (832) at one end away from the slider (83). The four slide rods (832) are respectively connected through the heat treatment channel (1) on both sides. The ends of two adjacent slide rods (832) away from the heat treatment channel (1) are fixedly connected to a connecting plate (833). The ends of the two slide rods (832) extending through the heat treatment channel (1) are each fitted with a spring (834). The two ends of the spring (834) are fixedly connected to the connecting plate (833) and the heat treatment channel (1) respectively. The heat treatment channel (1) is provided with a reciprocating mechanism for reciprocatingly pushing the connecting plate (833) near the connecting plate (833).

2. The pusher tray type heating furnace for heat treatment of a knuckle according to claim 1, characterized in that, A grid plate (75) is provided directly above the tray (7), and two symmetrical support frames (74) are fixedly connected between the grid plate (75) and the tray (7).

3. The pusher tray type heating furnace for heat treatment of a knuckle according to claim 1, characterized in that, The reciprocating mechanism includes two fixed rods (84) fixedly connected to the side wall of the heat treatment channel (1). A sliding plate (87) is installed on the two fixed rods (84). A first motor (88) is fixedly connected to the side of the sliding plate (87) opposite to the heat treatment channel (1). A cam (89) is fixedly connected to the output shaft of the first motor (88), and the cam (89) abuts against the surface of the connecting plate (833).

4. The pusher tray type heating furnace for heat treatment of a knuckle according to claim 3, characterized in that The two fixed rods (84) are fixedly connected to a base (85) at the ends away from the heat treatment channel (1). A first electric push rod (86) is fixedly connected to the base (85). The output shaft of the first electric push rod (86) is fixedly connected to the surface of the sliding plate (87). The sliding plate (87) and the fixed rods (84) are connected through each other and are slidably connected to each other.

5. The pusher tray type heating furnace for heat treatment of a knuckle according to claim 2, characterized in that, The top of the grid plate (75) is equipped with a plurality of serrated support strips (76), the serrated support strips (76) intersect perpendicularly with the direction of the strip through groove in the grid plate (75), and the direction of the strip through groove in the grid plate (75) is parallel to the direction of the flame outlet of the arc flame plate (81).

6. The pusher tray type heating furnace for heat treatment of a knuckle according to claim 5, characterized in that The surface of the serrated support strip (76) is set as a polished mirror surface, and the serrated support strip (76) and the grid plate (75) are installed by plugging.

7. The pusher tray type heating furnace for heat treatment of a knuckle according to claim 1, characterized in that, The tray (7) has a hopper-shaped groove and an installation groove in the center, and the installation groove is connected to the hopper-shaped groove. A rotating block (72) is rotatably connected in the installation groove, and the rotating block (72) is fitted and sealed with the installation groove. A baffle (71) is fixedly connected to one end of the rotating block (72) relative to the hopper-shaped groove, and the baffle (71) is sealed with the hopper-shaped groove. A torsion spring (73) is provided between the rotating block (72) and the installation groove.

8. The pusher tray type heating furnace for heat treatment of a knuckle according to claim 1, characterized in that, The top of the heating channel and the tempering channel is also provided with a turbulence device (9). The turbulence device (9) includes a number of second motors (91) set at the top of different temperature zones. The bottom of the second motor (91) and the top of the heat treatment channel (1) are fixedly connected with a number of first support columns (911). The output shaft of the second motor (91) is fixedly connected with a rotating rod (92). The bottom end of the rotating rod (92) penetrates the top of the heat treatment channel (1) and extends downward to the top of the grid plate (75). The end of the rotating rod (92) extending into the heat treatment channel (1) is fixedly connected with a number of fan blades (93). The fan blades (93) are fitted with a flow guide (94) on the outside and the fan blades are located in the middle of the flow guide (94). The top of the flow guide (94) and the top of the inner wall of the heat treatment channel (1) are fixedly connected with a number of second support columns (941).

9. The pusher tray type heating furnace for heat treatment of a knuckle according to claim 8, characterized in that, The diameter of the middle part of the flow guide (94) is smaller than the diameter of the two ends, and forms an arc-shaped surface with the two ends.

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