Hot air high temperature cycle tempering furnace for bearing machining and process thereof

Abstract

The present application relates to hot air tempering furnace technical field, specifically to bearing processing hot air high temperature circulating tempering furnace and process, when the bearing workpiece passes through the heating furnace chamber square way of the tempering furnace, if there is electric heating wire damage, the temperature of the hot air gathered and rising at the wind wheel will drop, the temperature sensor sends the detected temperature drop information to the host terminal of the tempering furnace, the host terminal controls the electromagnetic linkage to be electrified, the electromagnetic linkage establishes transmission between the vertical worm and the horizontal push device, the subsequent transmission causes all electric heating units to detect one by one, specifically, the main heating device and the temporary heating device in the electric heating unit change positions, if the main heating device has been damaged, after the main heating device and the temporary heating device change positions, the temporary heating device heats the airflow passing through, finally the internal temperature of the furnace chamber square way restores the specified hot air temperature, after the problem main heating device is checked out, the temporary heating device will completely replace the main heating device to heat the airflow, so as not to affect the heating work of the tempering furnace, and it is convenient for workers to position and repair the tempering furnace later.

Description

Technical Field

[0001] This invention relates to the field of hot air tempering furnace technology, specifically to a hot air high-temperature circulating tempering furnace and its process for bearing processing. Background Technology

[0002] Electric wire heating hot air tempering furnaces contain numerous heating wires. Damage to these heating wires can affect the tempering process of workpieces. There are several reasons for heating wire damage. For example, heating wires are designed with a certain power tolerance range; if used beyond this range for an extended period, the wire will generate excessive heat, leading to burnout. The quality of heating wires on the market varies greatly; some low-quality wires may use substandard materials or manufacturing processes, significantly shortening their lifespan. The operating environment also affects their lifespan; heating wires are susceptible to corrosion and oxidation, which in turn affects their performance and lifespan. During long-term use, heating wires require regular inspection and maintenance. Without timely maintenance, dirt and oxides will accumulate on the heating wires, affecting their heat dissipation and ultimately causing damage.

[0003] In bearing processing, tempering furnaces using heating wires are used. Damage to any heating wire in the tempering furnace will cause a slight drop in the furnace temperature. If a tempering furnace that is already in operation is forcibly interrupted due to the damage of a single heating wire, it will cause losses to production and processing. Automatically identifying and replacing damaged heating wires is a technological direction for innovative research and development of tempering furnaces.

[0004] The flat spiral heating wire used in the tempering furnace is prone to softening and deformation when heated, which is also a factor that accelerates the damage of the heating wire. The problem can be solved by circling multiple heat-resistant thin rods inside the spiral heating wire. The heat-resistant thin rods support the heating wire without affecting the heat dissipation of the heating wire. However, the heat dissipation at the contact point between the heat-resistant thin rods and the heating wire will be affected.

[0005] To address the above-mentioned problems, this invention provides a hot air high-temperature circulating tempering furnace for bearing processing and its process. Summary of the Invention

[0006] The purpose of this invention is to provide a hot air high-temperature circulating tempering furnace and its process for bearing processing, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a hot air high-temperature circulating tempering furnace for bearing processing, comprising:

[0008] The furnace is laid horizontally in a square tube shell, and multiple horizontal air vents are opened on both sides of the furnace shell in a matrix pattern.

[0009] The wind turbine is positioned above the circular opening in the top shell of the furnace square channel;

[0010] The motor equipment is connected to the top of the central vertical shaft on the wind turbine via a transmission connection.

[0011] Heating integrated mechanisms are provided on both sides of the outer side of the furnace square channel. The heating integrated mechanisms and the central vertical shaft on the impeller are linked by a speed reduction transmission component.

[0012] A temperature sensor is located below a circular hole in the top shell of the furnace square channel;

[0013] The heating integrated mechanism includes an external vertical worm gear, an integrated horizontal shaft driven on one side of the vertical worm gear, a row of branch vertical shafts driven on one side of the integrated horizontal shaft, and a row of electric heating units driven on each branch vertical shaft. All electric heating units are arranged in a matrix. The heating integrated mechanism also includes a row of horizontal pushing devices, an electromagnetic linkage that connects the horizontal pushing devices and the vertical worm gear at the edge, and a pressure generating device that drives the two adjacent horizontal pushing devices from end to end. Each horizontal pushing device controls a row of horizontal electric heating units. The airflow passing through the horizontal air holes of the furnace square channel is heated by a corresponding electric heating unit.

[0014] The electric heating unit includes:

[0015] The main heating fixtures are distributed at the horizontal air vents of the square channel in the furnace, and the temporary heating fixtures are distributed parallel to one side of the main heating fixtures;

[0016] Electrical control unit used to control the exchange of positions between main and temporary heating appliances.

[0017] The main heating fixture and the temporary heating fixture have the same structure and both include:

[0018] The heating wire has a spiral body, with both ends extending into the electrical box.

[0019] Multiple heat-resistant thin rods are evenly arranged in a ring inside the spiral section of the heating wire, and a horizontal column is used to support the multiple ring-arranged heat-resistant thin rods. One end of the heat-resistant thin rod is movably sleeved in a column hole opened on the horizontal column.

[0020] The electrical box includes a disc-shaped box, an exchange plate movably fitted into a circular hole on one side of the box, two pairs of conductive springs fixed on the exchange plate, a power supply line that contacts and energizes a pair of conductive springs, and a locking device that engages with a horizontal post. The locking device is distributed between the pair of energized conductive springs. The horizontal post is movably fitted into a through hole on the exchange plate. The end of the heating wire is connected to the conductive spring.

[0021] The electrical box also includes a cylindrical frame fixed in the middle of the exchange plate, and a pressure assembly that is driven by the cylindrical frame at one end. The clamping device, the cylindrical frame and the pressure assembly are all distributed in the round box, and the other end of the pressure assembly extends to the outside of the round box. The round box is fixed on the furnace channel.

[0022] The shaft clamping device includes an L-shaped fixed plate with one end fixed to a circular box, a neck shaft movably sleeved in a through hole on the L-shaped fixed plate, a multi-adjustment plate fixed at one end of the neck shaft, a plurality of T-plate columns evenly arranged around the multi-adjustment plate, and a clamping spring contacting one end of the T-plate column. The other end of the T-plate column is clamped into a ball groove on the bottom surface of the horizontal pile column, and the T-plate column slides through the column hole on the multi-adjustment plate. The other end of the neck shaft is equipped with a bevel gear to mesh with a ring bevel gear fixed on the branch vertical shaft for transmission.

[0023] The pressure assembly includes a steering frame fixed on a circular box, a J-shaped post that slides through a prism hole in the steering frame, a return spring contacted at one end of the J-shaped post, a range extender shaft movably fitted into a circular hole in the steering frame, and a range extender gear fixed at one end of the range extender shaft. The range extender gear meshes with an external gear ring on the cylinder frame for transmission. The other end of the range extender shaft meshes with a row of teeth on the J-shaped post through a shaft gear. One end of the return spring is fixed on the steering frame, and the other end of the J-shaped post extends to the outside of the circular box.

[0024] The pushing device includes a first pile block fixed on the furnace square channel, a screw rod with one end movably sleeved in a column hole on the first pile block, a bridge frame screwed on the screw rod, and long sliding rods distributed parallel to both sides of the screw rod. One end of the long sliding rod is fixed on the first pile block, and the long sliding rod slides through the column hole on the bridge frame. The screw rod rotates to drive the bridge frame to move horizontally, and a flat plate is set on the bridge frame to push against the encountered J-shaped column.

[0025] The pressing device includes a second pile block fixed on the furnace square channel, a tailing device supported on the second pile block, and a bridge shaft with vertical transmission at one end of the tailing device. The other end of the tailing device establishes transmission with the lead screw in the previous flat pushing device. The bridge shaft is vertically transmitted with the lead screw in the next flat pushing device. The previous flat pushing device and the next flat pushing device are distributed in opposite directions. The long slide rod is fixedly connected to the second pile block.

[0026] The tail assembly includes a tail shaft movably fitted into a post hole in the second pile block, a double-acting short shaft at one end of the tail shaft, an S-shaped spring connecting the tail shaft and the double-acting short shaft, a sliding block supported between two long sliding rods, a spring placed between the sliding block and the second pile block, and a movable shaft gear movably fitted into a through hole in the middle of the sliding block. One end of the movable shaft gear slides into a gear groove at the end of the lead screw, and the other end of the movable shaft gear is inserted into a gear groove on the double-acting short shaft by axial movement. The spring is fitted onto the long sliding rod, which slides through the post hole in the sliding block. The tail shaft slides into an arc plate groove on the outer wall of the double-acting short shaft by means of an arc plate. One end of the bridge shaft drives a bevel gear fixed at the other end of the tail shaft through a fixed bevel gear, and the other end of the bridge shaft also drives a bevel gear fixed at the end of the lead screw through a fixed bevel gear.

[0027] The hot air high-temperature circulation process for bearing machining includes the following steps:

[0028] Step 1: The conveyor trolley carries the bearing workpiece through the furnace tunnel. Multiple streams of hot air flow inside the furnace tunnel, and the bearing workpieces are heated by passing through the areas blown by the multiple streams of hot air one by one.

[0029] Step 2: The single-stream circulating hot air is circulated by the rotation of the impeller. The impeller absorbs the hot air in the furnace square channel and then diffuses the hot air to the outside of the furnace square channel. The hot air is separated above the furnace square channel and flows to both sides. Then it flows through the matrix horizontal bar air holes on both sides of the furnace square channel and then flows into the inside of the furnace square channel. The main heat appliance heats the air that passes through.

[0030] Step 3: If the main heating appliance is damaged, the temperature of the hot air that gathers and rises at the top round hole of the furnace square channel will drop. The temperature sensor will send the detected temperature drop information to the main terminal of the tempering furnace. The main terminal will control the electromagnetic linkage to be energized. The electromagnetic linkage will establish a transmission between the horizontal push device and the vertical worm gear. The subsequent transmission will control the electric heating units on the transmission path one by one to complete the internal exchange.

[0031] Step 4: The internal exchange of the electric heating unit specifically involves the repositioning of the main heating element and the temporary heating element. The main heating element is automatically de-energized, while the temporary heating element is energized and operates. If the main heating element is in normal condition, the temperature of the hot air supplied to the furnace duct stabilizes and remains unchanged after the repositioning of the main and temporary heating elements. If the main heating element is faulty and not heating, the temperature of the hot air supplied to the furnace duct rises after the repositioning of the main and temporary heating elements, and eventually the temperature sensor detects that the temperature of the passed hot air has returned to normal. At this time, the temperature sensor sends a normal temperature signal to the main terminal again, and the main terminal controls the electromagnetic linkage to de-energize, disconnecting the transmission between the vertical worm and the horizontal push device. The faulty main heating element is always replaced by the temporary heating element, while the normal main heating element in the previous troubleshooting process will automatically replace the temporary heating element again.

[0032] Compared with the prior art, the beneficial effects of the present invention are:

[0033] 1. When the bearing workpiece passes through the furnace duct of the tempering furnace, if any heating wire is damaged, the temperature of the rising hot air at the impeller will drop. The temperature sensor will send the detected temperature drop information to the main terminal of the tempering furnace. The main terminal will control the electromagnetic linkage to be energized. The electromagnetic linkage establishes a transmission between the vertical worm and the horizontal pusher. The subsequent transmission causes all heating units to perform self-tests one by one. Specifically, the main heating element and the temporary heating element in the heating unit will change positions. If the main heating element is damaged, after the main heating element and the temporary heating element change positions, the temporary heating element will heat the airflow passing through it. Finally, the internal structure of the furnace duct will return to normal. Once the hot air temperature is set and the temperature sensor detects that the temperature of the hot air has returned to normal, it sends the change information back to the main terminal, thus determining the location of the damaged main heating element. Conversely, if the main heating element is not damaged, and the positions of the main heating element and the temporary heating element are switched, if the hot air temperature inside the furnace duct does not return to normal after stabilization, then the self-test of the next electric heating unit continues until the location of the problematic main heating element is found. After the problematic main heating element is found, the temporary heating element will completely replace the main heating element to heat the airflow, thus not affecting the heating operation of the tempering furnace, and at the same time facilitating the later location and maintenance of the tempering furnace by the workers.

[0034] 2. The present invention uses multiple heat-resistant thin rods arranged in a ring inside the spiral section of the heating wire to continuously rotate and support the heating wire, so as to prevent the high-temperature heating wire from deforming due to gravity or wind. At the same time, the contact position between the heat-resistant thin rods and the heating wire is constantly changing, so as to avoid the problem of heat accumulation in local sections of the heating wire. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of the present invention.

[0036] Figure 2 This is a schematic diagram showing the location of the wind turbine.

[0037] Figure 3 This is a schematic diagram showing the location of the horizontal pushing device.

[0038] Figure 4 This is a schematic diagram of the furnace flume structure.

[0039] Figure 5 This is a schematic diagram showing the location of the electric heating unit.

[0040] Figure 6 This is a schematic diagram of the electrothermal unit structure.

[0041] Figure 7 This is a schematic diagram showing the location of the electromagnetic actuator.

[0042] Figure 8 This is a schematic diagram of the main heating element structure.

[0043] Figure 9 This is a schematic diagram of the electrical box structure.

[0044] Figure 10 This is a schematic diagram of a conductive spring structure.

[0045] Figure 11 This is a schematic diagram of the shaft clamping device.

[0046] Figure 12 This is a schematic diagram of the pressure assembly structure.

[0047] Figure 13 This is a schematic diagram of the pressure generating device.

[0048] Figure 14 This is a schematic diagram of the tail connector structure.

[0049] In the diagram: 1. Furnace square channel; 2. Wind turbine; 3. Motor equipment; 4. Heating integrated mechanism; 5. Temperature sensor; 6. Integrated horizontal shaft; 7. Branch vertical shaft; 8. Electric heating unit; 9. Horizontal pusher; 10. Pressurizing device; 11. Electromagnetic linkage; 12. Vertical worm gear; 13. Main heating fixture; 14. Temporary heating fixture; 15. Electrical box; 16. Heating wire; 17. Heat-resistant thin rod; 18. Horizontal column; 19. Round box; 20. Exchange plate; 21. Conductive spring; 22. Power supply line; 23. Shaft clamping device; 24. Cylinder. Frame 24, Pressure assembly 25, Neck shaft 26, L-shaped fixed plate 27, Clamping spring 28, Multi-adjustment plate 29, T-plate column 30, Return spring 31, Extender shaft 32, Extender gear 33, Steering frame 34, J-shaped column 35, First pile block 36, Bridge frame 37, Long slide rod 38, Lead screw 39, Second pile block 40, Tail connector 41, Bridge shaft 42, Live shaft gear 43, Swing block 44, Spring 45, Double-acting short shaft 46, S-shaped spring 47, Tail shaft 48. Detailed Implementation

[0050] 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 technical solutions 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.

[0051] Please see Figures 1 to 14 This invention provides a technical solution: a hot air high-temperature circulating tempering furnace for bearing processing, comprising:

[0052] The furnace square channel 1 is laid horizontally. The furnace square channel 1 is a square cylindrical shell. Multiple horizontal air holes are opened on both sides of the shell of the furnace square channel 1 in a matrix distribution.

[0053] Wind turbine 2 is located above the round hole opened on the top shell of the furnace square channel 1;

[0054] The top of the central vertical shaft on the wind turbine 2 is connected to the motor device 3 for transmission.

[0055] Heating integrated mechanisms 4 are installed on both sides of the outer side of the furnace square channel 1. The heating integrated mechanism 4 and the central vertical shaft on the impeller 2 are linked by a speed reduction transmission component. The speed reduction transmission component is an existing technology device. (Refer to...) Figure 5 It is understood that the speed is first reduced by a large gear, and then transmitted to the heating integrated mechanism 4 through a horizontal shaft transmission;

[0056] Temperature sensor 5 is located below the round hole in the top shell of the furnace square channel 1;

[0057] The heating integrated mechanism 4 includes an external vertical worm gear 12, an integrated flat shaft 6 driven on one side of the vertical worm gear 12, a row of branch vertical shafts 7 driven on one side of the integrated flat shaft 6, and a row of electric heating units 8 driven on each branch vertical shaft 7. All electric heating units 8 are arranged in a matrix. The heating integrated mechanism 4 also includes a row of horizontal pushing devices 9, an electromagnetic linkage 11 that connects and drives the horizontal pushing devices 9 and the vertical worm gear 12 at the edge, and a pressure generating device 10 that drives the head and tail between two adjacent horizontal pushing devices 9. Each horizontal pushing device 9 corresponds to pushing and controlling a row of horizontal electric heating units 8. The airflow passing through the horizontal air holes of the furnace square channel 1 is heated by a corresponding electric heating unit 8. One end of the integrated flat shaft 6 is equipped with a gear to connect with the vertical worm gear. The spiral gear meshing transmission on 12, the branch vertical shaft 7 is connected to the ring bevel gear on the integrated flat shaft 6 by a bevel gear at one end, and the electromagnetic linkage 11 is an existing technology instrument. The electromagnetic linkage 11 is equipped with a short shaft that moves axially, and an electromagnet device that controls the axial lifting and lowering of the short shaft by magnetic attraction. The temperature sensor 5 detects the temperature of the airflow that rises and is discharged through the top round hole of the furnace square channel 1. If the electric heating unit 8 fails to heat, the airflow temperature detected by the temperature sensor 5 is lower than the specified level. The temperature sensor 5 sends a signal to the main terminal of the tempering furnace, thereby controlling the short shaft on the electromagnetic linkage 11 to extend, and the extended short shaft establishes a transmission with the vertical worm gear 12. In this way, the subsequent transmission makes the docked flat push device 9 run.

[0058] refer to Figure 6 Understood, the electric heating unit 8 includes:

[0059] The main heating element 13 is distributed at the horizontal air vent of the square channel 1 in the furnace, and the temporary heating element 14 is distributed parallel to one side of the main heating element 13;

[0060] Electrical box 15 for controlling the exchange of positions between the main heating element 13 and the temporary heating element 14.

[0061] refer to Figure 8 It is understood that the main heating fixture 13 and the temporary heating fixture 14 have the same structure and both include:

[0062] The heating wire 16 has a spiral section as its main body, and both ends of the heating wire 16 extend into the electric box 15.

[0063] The heating wire 16 has multiple heat-resistant thin rods 17 evenly arranged in a spiral section inside, and a horizontal column 18 for supporting the multiple heat-resistant thin rods 17. One end of the heat-resistant thin rod 17 is movably sleeved in a column hole opened on the horizontal column 18.

[0064] refer to Figure 9 The electrical box 15 includes a disc-shaped box 19, an exchange plate 20 movably fitted into a circular hole on one side of the box 19, two pairs of conductive springs 21 fixed on the exchange plate 20, a power supply line 22 that contacts and energizes the pair of conductive springs 21, and a locking device 23 that engages with a horizontal post 18. The locking device 23 is distributed between the pair of energized conductive springs 21. The horizontal post 18 is movably fitted into a through hole in the exchange plate 20. The end of the heating wire 16 is connected to the conductive spring 21. The edge of the exchange plate 20 is engaged into an annular groove in the box 19 by a convex ring.

[0065] refer to Figure 9 It is understood that the electrical box 15 also includes a cylinder frame 24 fixed in the middle of the exchange plate 20, and a pressure group 25 that is driven by the cylinder frame 24 at one end. The shaft clamping device 23, the cylinder frame 24 and the pressure group 25 are all distributed in the round box 19, and the other end of the pressure group 25 extends to the outside of the round box 19. The round box 19 is fixed on the furnace square channel 1.

[0066] refer to Figure 11 The clamping device 23 includes an L-shaped fixed plate 27 with one end fixed to the round box 19, a neck shaft 26 movably sleeved in a through hole in the L-shaped fixed plate 27, a multi-adjustment plate 29 fixed at one end of the neck shaft 26, a plurality of T-plate columns 30 evenly arranged around the multi-adjustment plate 29, and a clamping spring 28 contacting one end of the T-plate column 30. The other end of the T-plate column 30 is clamped into a ball groove on the bottom surface of the horizontal column 18, and the T-plate column 30 slides through the column hole in the multi-adjustment plate 29. The other end of the neck shaft 26 is connected to a ring bevel gear fixed on the branch vertical shaft 7 for transmission.

[0067] The pressure assembly 25 includes a steering frame 34 fixed on the round box 19, a J-shaped post 35 that slides through a prism hole in the steering frame 34, a return spring 31 that contacts one end of the J-shaped post 35, a range extender shaft 32 that is movably sleeved in the round hole in the steering frame 34, and a range extender gear 33 fixed at one end of the range extender shaft 32. The range extender gear 33 meshes with an external gear ring on the cylinder frame 24 for transmission. The other end of the range extender shaft 32 meshes with a row of teeth on the J-shaped post 35 through a shaft gear. One end of the return spring 31 is fixed on the steering frame 34, and the other end of the J-shaped post 35 extends to the outside of the round box 19.

[0068] The horizontal pushing device 9 includes a first pile block 36 fixed on the furnace square channel 1, a screw rod 39 with one end movably sleeved in a column hole opened in the first pile block 36, a bridge frame 37 screwed on the screw rod 39, and long sliding rods 38 distributed parallel to both sides of the screw rod 39. One end of the long sliding rod 38 is fixed on the first pile block 36, and the long sliding rod 38 slides through the column hole opened in the bridge frame 37. The screw rod 39 rotates to drive the bridge frame 37 to translate, and the bridge frame 37 pushes the encountered J-shaped column 35 by setting a plate.

[0069] The pressing device 10 includes a second pile block 40 fixed on the furnace square channel 1, a tail connector 41 supported on the second pile block 40, and a bridge shaft 42 with vertical transmission at one end of the tail connector 41. The other end of the tail connector 41 establishes transmission with the lead screw 39 in the previous flat push device 9. The bridge shaft 42 is vertically transmitted with the lead screw 39 in the next flat push device 9. The previous flat push device 9 and the next flat push device 9 are distributed in opposite directions. The long slide rod 38 is fixedly connected to the second pile block 40.

[0070] The tail assembly 41 includes a tail shaft 48 movably fitted into a hole in the second pile block 40, a double-acting short shaft 46 at one end of the tail shaft 48, an S-shaped spring 47 connecting the tail shaft 48 and the double-acting short shaft 46, a sliding block 44 supported between two long sliding rods 38, a spring 45 placed between the sliding block 44 and the second pile block 40, and a movable shaft gear 43 movably fitted into a through hole in the middle of the sliding block 44. One end of the movable shaft gear 43 is slidably inserted into a gear groove at the end of the lead screw 39. The other end of gear 43 is inserted into the gear groove on the double-acting short shaft 46 by axial movement. Spring 45 is sleeved on long slide rod 38. Long slide rod 38 slides through the column hole on the sliding block 44. Tail shaft 48 is slidably inserted into the arc plate groove on the outer wall of double-acting short shaft 46 by setting arc plate. One end of bridge shaft 42 is driven by fixed bevel gear to change direction with bevel gear fixed at the other end of tail shaft 48. The other end of bridge shaft 42 is also driven by fixed bevel gear to change direction with bevel gear fixed at the end of lead screw 39.

[0071] The hot air high-temperature circulation process for bearing machining includes the following steps:

[0072] Step 1: The conveyor trolley carries the bearing workpiece through the furnace square channel 1. Multiple streams of hot air flow inside the furnace square channel 1. The bearing workpiece passes through the area blown by the multiple streams of hot air one by one to achieve heating.

[0073] Step 2: The single-stream circulating hot air flows through the rotation of the impeller 2. The impeller 2 absorbs the hot air in the furnace square channel 1 and then diffuses the hot air to the outside of the furnace square channel 1. The hot air is separated above the furnace square channel 1 and flows to both sides. Then it flows through the matrix horizontal bar air holes on both sides of the furnace square channel 1 and then flows into the interior of the furnace square channel 1. The main heating device 13 heats the passing air.

[0074] Step 3: If the main heating element 13 is damaged, the temperature of the hot air that gathers and rises at the top round hole of the furnace square channel 1 drops. The temperature sensor 5 sends the detected temperature drop information to the main terminal of the tempering furnace. The main terminal controls the electromagnetic linkage 11 to be energized. The electromagnetic linkage 11 establishes a transmission between the flat push device 9 and the vertical worm gear 12. The subsequent transmission controls the electric heating unit 8 on the transmission path one by one to complete the internal exchange.

[0075] Step 4: The internal exchange of the electric heating unit 8 specifically involves the repositioning of the main heating element 13 and the temporary heating element 14. The main heating element 13 is automatically de-energized, while the temporary heating element 14 is energized and operates. If the main heating element 13 is in a normal state, the temperature of the hot air supplied to the furnace duct 1 stabilizes and remains unchanged after the repositioning of the main heating element 13 and the temporary heating element 14. If the main heating element 13 is in a faulty and non-heating state, the temperature of the hot air supplied to the furnace duct 1 rises after the repositioning of the main heating element 13 and the temporary heating element 14. Eventually, the temperature of the hot air detected by the temperature sensor 5 returns to normal. At this time, the temperature sensor 5 sends a normal temperature signal to the main terminal again. The main terminal controls the electromagnetic linkage 11 to de-energize, and the transmission between the vertical worm gear 12 and the horizontal pusher 9 is disconnected. The faulty main heating element 13 is always replaced by the temporary heating element 14, while the normal main heating element 13 in the previous troubleshooting process will automatically replace the temporary heating element 14 again.

[0076] The principle of the exchange transmission between the main heating device 13 and the temporary heating device 14: After the electromagnetic linkage 11 establishes a transmission between the vertical worm gear 12 and the horizontal push device 9, the lead screw 39 on the horizontal push device 9 rotates, causing the bridge frame 37 to translate. The bridge frame 37, during translation, will push against the J-shaped column 35 it encounters. The J-shaped column 35 rises to drive the extension shaft 32 to rotate. Subsequently, the extension gear 33 drives the cylinder frame 24 to rotate, and then the exchange disk 20 completes half a rotation. The exchange disk 20 controls the main heating device 13 and the temporary heating device 14 to change positions. After the position change, the pair of conductive springs 21 connected to the main heating device 13 and the power supply line 22 are disconnected and de-energized. The pair of conductive springs 21 connected to the temporary heating device 14 and the power supply line 22 are in contact and energized. At the same time, the horizontal post 18 on the main heating device 13 and the shaft clamping device 23 are separated, while the horizontal post 18 on the temporary heating device 14 rotates half a circle and then engages with the shaft clamping device 23.

[0077] After the horizontal column 18 and the clamping device 23 are engaged, the horizontal column 18 continues to rotate. As a result, the multiple heat-resistant thin rods 17 supported on the horizontal column 18 rotate inside the spiral section of the heating wire 16. In this way, the multiple heat-resistant thin rods 17 work together to stably support the heating wire 16, preventing the high-heat heating wire 16 from deforming due to gravity or wind. In addition, the contact point between the heat-resistant thin rods 17 and the heating wire 16 is constantly changing, thus avoiding the problem of local heat accumulation in the heating wire 16. The horizontal column 18 rotates because the vertical worm gear 12 drives the integrated flat shaft 6, which then drives the neck shaft 26 through the branch vertical shaft 7. Next, the multi-adjustment plate 29 drives the T-plate column 30, thereby controlling the rotation of the horizontal column 18.

[0078] refer to Figure 13 and Figure 14 Understanding is that after the cable tray 37 moves to the right, it is no longer screwed to the lead screw 39. Simultaneously, the cable tray 37 pushes the sliding block 44, causing the axial movement of the live shaft gear 43. The right end of the live shaft gear 43 inserts into the double-acting short shaft 46, thus establishing a new transmission path. The double-acting short shaft 46, the S-shaped spring 47, and the tail shaft 48 rotate synchronously, subsequently transmitting power to the next lead screw 39 via the bridge shaft 42, causing the next cable tray 37 to move. Figure 13 After the upper middle cable tray 37 moves to the right to its end, the lower cable tray 37 begins to move to the left.

[0079] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hot air high-temperature circulating tempering furnace for bearing processing, characterized in that, Including: The furnace is laid horizontally in a square tube shell, and multiple horizontal air vents are opened on both sides of the furnace shell in a matrix pattern. The wind turbine is positioned above the circular opening in the top shell of the furnace square channel; The motor equipment is connected to the top of the central vertical shaft on the wind turbine via a transmission connection. Heating integrated mechanisms are provided on both sides of the outer side of the furnace square channel. The heating integrated mechanisms and the central vertical shaft on the impeller are linked by a speed reduction transmission component. A temperature sensor is located below a circular hole in the top shell of the furnace square channel; The heating integrated mechanism includes an external vertical worm gear, an integrated flat shaft driven on one side of the vertical worm gear, a row of branch vertical shafts driven on one side of the integrated flat shaft, and a row of electric heating units driven on each branch vertical shaft. All electric heating units are arranged in a matrix. The heating integrated mechanism also includes a row of flat pushing devices, an electromagnetic linkage that connects the flat pushing devices and the vertical worm gear at the edge position, and a pressure generating device that drives the two adjacent flat pushing devices from end to end. Each flat pushing device corresponds to pushing and controlling a row of horizontal electric heating units. The airflow passing through the horizontal air holes of the furnace square channel will be heated by a corresponding electric heating unit. The electric heating unit includes: The main heating fixtures are distributed at the horizontal air vents of the square channel in the furnace, and the temporary heating fixtures are distributed parallel to one side of the main heating fixtures; Electrical boxes used to control the exchange positions of main and temporary heating appliances; The main heating fixture and the temporary heating fixture have the same structure and both include: The heating wire has a spiral body, with both ends extending into the electrical box. Multiple heat-resistant thin rods are evenly arranged in a ring inside the spiral section of the heating wire, and a horizontal column is used to support the multiple ring-arranged heat-resistant thin rods. One end of the heat-resistant thin rod is movably sleeved in a column hole opened on the horizontal column. The electrical box includes a disc-shaped box, an exchange plate movably fitted into a circular hole on one side of the box, two pairs of conductive springs fixed on the exchange plate, a power supply line that contacts and energizes a pair of conductive springs, and a locking device that engages with a horizontal post. The locking device is distributed between the pair of energized conductive springs. The horizontal post is movably fitted into a through hole on the exchange plate. The end of the heating wire is connected to the conductive spring. The electrical box also includes a cylindrical frame fixed in the middle of the exchange plate, and a pressure group that is driven by the cylindrical frame at one end. The clamping device, the cylindrical frame and the pressure group are all distributed in the round box, and the other end of the pressure group extends to the outside of the round box. The round box is fixed on the furnace square channel. The pressure assembly includes a steering frame fixed on a round box, a J-shaped post that slides through a prism hole in the steering frame, a return spring contacted at one end of the J-shaped post, a range extender shaft movably sleeved in the round hole in the steering frame, and a range extender gear fixed at one end of the range extender shaft. The range extender gear meshes with an external gear ring on the cylinder frame, and the other end of the range extender shaft meshes with a row of teeth on the J-shaped post through a shaft gear. One end of the return spring is fixed on the steering frame, and the other end of the J-shaped post extends to the outside of the round box. The pushing device includes a first pile block fixed on the furnace square channel, a screw rod with one end movably sleeved in a column hole on the first pile block, a bridge frame screwed on the screw rod, and long sliding rods distributed parallel to both sides of the screw rod. One end of the long sliding rod is fixed on the first pile block, and the long sliding rod slides through the column hole on the bridge frame. The screw rod rotates to drive the bridge frame to move horizontally, and a flat plate is set on the bridge frame to push against the encountered J-shaped column.

2. The hot air high-temperature circulating tempering furnace for bearing processing according to claim 1, characterized in that: The shaft clamping device includes an L-shaped fixed plate with one end fixed to a circular box, a neck shaft movably sleeved in a through hole on the L-shaped fixed plate, a multi-adjustment plate fixed at one end of the neck shaft, a plurality of T-plate columns evenly arranged around the multi-adjustment plate, and a clamping spring contacting one end of the T-plate column. The other end of the T-plate column is clamped into a ball groove on the bottom surface of the horizontal pile column, and the T-plate column slides through the column hole on the multi-adjustment plate. The other end of the neck shaft is equipped with a bevel gear to mesh with a ring bevel gear fixed on the branch vertical shaft for transmission.

3. The hot air high-temperature circulating tempering furnace for bearing processing according to claim 1, characterized in that: The pressing device includes a second pile block fixed on the furnace square channel, a tailing device supported on the second pile block, and a bridge shaft with vertical transmission at one end of the tailing device. The other end of the tailing device establishes transmission with the lead screw in the previous flat pushing device. The bridge shaft is vertically transmitted with the lead screw in the next flat pushing device. The previous flat pushing device and the next flat pushing device are distributed in opposite directions. The long slide rod is fixedly connected to the second pile block.

4. The hot air high-temperature circulating tempering furnace for bearing processing according to claim 3, characterized in that: The tail assembly includes a tail shaft movably fitted into a post hole in the second pile block, a double-acting short shaft at one end of the tail shaft, an S-shaped spring connecting the tail shaft and the double-acting short shaft, a sliding block supported between two long sliding rods, a spring placed between the sliding block and the second pile block, and a movable shaft gear movably fitted into a through hole in the middle of the sliding block. One end of the movable shaft gear slides into a gear groove at the end of the lead screw, and the other end of the movable shaft gear is inserted into a gear groove on the double-acting short shaft by axial movement. The spring is fitted onto the long sliding rod, which slides through the post hole in the sliding block. The tail shaft slides into an arc plate groove on the outer wall of the double-acting short shaft by means of an arc plate. One end of the bridge shaft drives a bevel gear fixed at the other end of the tail shaft through a fixed bevel gear, and the other end of the bridge shaft also drives a bevel gear fixed at the end of the lead screw through a fixed bevel gear.

5. A hot air high-temperature circulating process for bearing processing, using the hot air high-temperature circulating tempering furnace for bearing processing as described in claim 1, characterized in that, Includes the following steps: Step 1: The conveyor trolley carries the bearing workpiece through the furnace tunnel. Multiple streams of hot air flow inside the furnace tunnel, and the bearing workpieces are heated by passing through the areas blown by the multiple streams of hot air one by one. Step 2: The single-stream circulating hot air is circulated by the rotation of the impeller. The impeller absorbs the hot air in the furnace square channel and then diffuses the hot air to the outside of the furnace square channel. The hot air is separated above the furnace square channel and flows to both sides. Then it flows through the matrix horizontal bar air holes on both sides of the furnace square channel and then flows into the inside of the furnace square channel. The main heat appliance heats the air that passes through. Step 3: If the main heating appliance is damaged, the temperature of the hot air that gathers and rises at the top round hole of the furnace square channel will drop. The temperature sensor will send the detected temperature drop information to the main terminal of the tempering furnace. The main terminal will control the electromagnetic linkage to be energized. The electromagnetic linkage will establish a transmission between the horizontal push device and the vertical worm gear. The subsequent transmission will control the electric heating units on the transmission path one by one to complete the internal exchange. Step 4: The internal exchange of the electric heating unit specifically involves the repositioning of the main heating element and the temporary heating element. The main heating element is automatically de-energized, while the temporary heating element is energized and operates. If the main heating element is in normal condition, the temperature of the hot air supplied to the furnace duct stabilizes and remains unchanged after the repositioning of the main and temporary heating elements. If the main heating element is faulty and not heating, the temperature of the hot air supplied to the furnace duct rises after the repositioning of the main and temporary heating elements, and eventually the temperature sensor detects that the temperature of the passed hot air has returned to normal. At this time, the temperature sensor sends a normal temperature signal to the main terminal again, and the main terminal controls the electromagnetic linkage to de-energize, disconnecting the transmission between the vertical worm and the horizontal push device. The faulty main heating element is always replaced by the temporary heating element, while the normal main heating element in the previous troubleshooting process will automatically replace the temporary heating element again.

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