Bearing steel ball quenching furnace
By introducing spiral guides and double furnace door sealing devices into the drum-type resistance furnace, continuous quenching production of bearing steel balls is achieved, solving the problems of low production efficiency and unstable quality in the existing technology and improving the quality and efficiency of heat treatment.
Patent Information
- Application Number
- CN202510674275.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-23
- Publication Date
- 2025-09-16
AI Technical Summary
The cyclic operation mode of the existing drum-type resistance furnace makes it impossible to achieve continuous processing in the production of bearing steel balls, resulting in unstable heat treatment quality, low pass rate and high cost.
The drum design with spiral guides, combined with double furnace door sealed feeding and sealed blanking devices, achieves an uninterrupted quenching process, and improves furnace sealing and temperature control through independent heating areas and linked blanking mechanisms.
The continuous production of bearing steel balls is achieved, the quality and efficiency of heat treatment are improved, and the production cost is reduced.
Smart Images
Figure CN120648893A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of heat treatment equipment for bearing steel balls, and in particular to a bearing steel ball quenching furnace. Background Art
[0002] With improvements in steel ball manufacturing processes and the development and upgrading of equipment, the current process flow is as follows: raw material (bar) - cold heading - polishing - heat treatment - hard grinding - initial grinding - fine grinding - super fine grinding - optical appearance - cleaning and rust prevention - finished product inspection - packaging. Cold heading involves using a steel ball cold heading machine to process the bar-shaped material into a blank. The polishing stage is used to standardize the dimensional tolerances after the cold heading stage, grinding away the ring bands and poles of the ball blank, and at this stage, the ball is basically spherical. The heat treatment process is used to change the internal structure of the ball blank, improving the strength and service life of the steel ball. The hard grinding process is mainly used to improve the dimensional accuracy of the steel ball. The grinding process improves the surface accuracy, and then the surface inspection device is used to sort and complete the processing.
[0003] The heating furnace used in the heat treatment process of the ball blank is a drum furnace. The existing drum resistance furnace is a cycle operation type resistance furnace, which is mainly used for heat treatment heating such as gas carburizing, carbonitriding and bright quenching of bearing steel balls, rollers and other small standard parts. It has the following technical defects: 1) Cyclic operation (that is, after one batch is processed, the next batch is processed), which makes it impossible to continuously produce and process steel balls, reduces the efficiency of steel ball forming, and has low output; 2) The heat treatment quality is unstable (mainly due to the insufficient sealing of the drum furnace). There are great differences in the internal structure of the steel balls, resulting in a very low pass rate and a high manufacturing cost of the steel balls. Summary of the Invention
[0004] In order to overcome the deficiencies of the prior art, the present application provides a bearing steel ball quenching furnace.
[0005] The present application provides a bearing steel ball quenching furnace adopting the following technical solutions: A bearing steel ball quenching furnace comprises a furnace body with a feed end and a discharge end, wherein a roller is arranged in the furnace body to rotate around an axis extending in the horizontal direction, and the inner wall of the roller is provided with a spiral guide member spirally distributed along the length direction of the roller, and a feed port and a discharge port are respectively provided at both ends of the roller; a driving component for driving the roller to rotate is provided on the furnace body, and a heating component is provided between the outer side of the roller and the inner wall of the furnace body; the feed end is located at one end of the furnace body, and a double furnace door sealed feeding device is provided at the feed end, and the double furnace door sealed feeding device sends the steel balls to the feed port of the roller through the feed end; the discharge end is located at the other end of the furnace body, and a sealed blanking device is provided at the discharge end, and is connected to the discharge port of the roller.
[0006] By adopting the above technical solution, when quenching, the heating component maintains the temperature in the furnace body at the set quenching temperature in different areas, and the double furnace door sealed feeding device sends the ball blanks to the inside of the drum through the feeding end and the feeding port in batches and in a quantitative manner. The driving component drives the drum to rotate, and the spiral guide member guides the ball blanks to move from the feeding port of the drum to the discharging port. When a batch of heated ball blanks moves to the discharging end, and the discharging port of the drum rotates to face downward, the steel balls automatically fall into the sealed blanking device, and the sealed blanking device sends the heated ball blanks out of the furnace body in batches and in a quantitative manner for oil extraction. The present invention can achieve uninterrupted quenching, and due to the provision of the double furnace door sealed feeding device and the sealed blanking device, the sealing of the furnace body during feeding and unloading is improved, and compared with the prior art, the temperature inside the furnace body is improved, thereby improving the quality and efficiency of heat treatment.
[0007] Optionally, the driving assembly includes two load-bearing rollers arranged side by side at one end of the furnace body and rotating around their own axis, and a support bearing installed at the other end of the furnace body. One end of the roller is freely mounted on the two load-bearing rollers, and the other end of the roller is installed with a tail shaft, which is rotatably arranged in the support bearing, and a sprocket is installed on the tail shaft, and the sprocket is driven by a reducer installed outside the furnace body; the two load-bearing rollers are arranged on a support frame rigidly connected to the furnace body, and a screw fine-tuning device and a locking device are provided on the support frame, and the position of the two load-bearing rollers is adjusted by the screw fine-tuning device.
[0008] By adopting this technical solution, when installing the load-bearing rollers, the operator adjusts the position of the two load-bearing rollers using a screw fine-tuning device to adjust the left and right, height, and bottom of the drum axis, ensuring that the drum axis is ultimately aligned with the center of the drum axis, ensuring the stability of the drum operation. After adjustment, a locking device secures the position of the two load-bearing rollers to prevent them from shifting during production. During normal operation, the reducer drives the tail shaft through the sprocket, which in turn drives the drum. The drum then rotates the two load-bearing rollers due to friction. The three-point support structure improves the stability of the drum's rotation.
[0009] Optionally, one end of the carrying roller protrudes from the furnace body through a circular hole opened on the furnace body, and a movable sealing cover is installed on the furnace body for sealing the connection between the carrying roller and the furnace body; a water cooling device is provided on the movable sealing cover, and the water cooling device injects water into the interior of the carrying roller through the end of the carrying roller protruding from the furnace body to cool it down.
[0010] By adopting this technical solution, the movable sealing cover can reduce temperature loss at the connection between the load roller and the furnace body, improving the sealing of the furnace body. The load roller is hollow. During use, the water cooling device uses a water pump to continuously inject room temperature water into the load roller through the end of the load roller protruding from the furnace body, cooling the load roller and preventing it from overheating.
[0011] Optionally, the sealed blanking device includes a Y-shaped channel body, a rectangular channel body and a discharge pipe, the Y-shaped channel body and the rectangular channel body are arranged in the furnace body, and the discharge pipe is sealed and connected to the discharge end through a flange; the upper end of the Y-shaped channel body is connected to the discharge port of the roller, and the upper end of the rectangular channel body is connected to the lower end of the Y-shaped channel body, and the Y-shaped channel body and the rectangular channel body are surrounded by heavy wear-resistant alumina prefabricated bricks; the lower end of the discharge pipe is inserted below the oil level of the quenching tank to form an oil seal; a group of slit oil curtain nozzles are respectively provided on the front and rear sides of the lower end of the discharge pipe, and the slit oil curtain nozzles are supplied with oil through a circulating pump to form a cross oil curtain.
[0012] The cam is connected to the rear member of the box body and is provided with a support structure for supporting the box body, so that the cam body can be lifted up and down and the cam body can be lifted up and down by the support structure.
[0013] By adopting the above technical solution, when the heated ball blank falls into the Y-shaped channel body, the auxiliary blanking block stops at its highest point, the stop block is located at the top of the limiting groove, the upper end of the blanking channel is now connected to the space surrounded by the Y-shaped channel body, and the lower end of the blanking channel is located within the rectangular channel body, allowing the heated ball blank to enter the blanking channel. During the rotation of the tail shaft drive drum, the auxiliary blanking block is driven to fall through a linkage member and stop at its lowest point, the stop block is located at the bottom of the limiting groove, and the ball blank follows the auxiliary blanking block to fall. At this time, the lower end of the blanking channel is connected to the space surrounded by the blanking pipe, and the upper end of the blanking channel is located within the rectangular channel body, and the ball blank leaves the blanking channel under the action of gravity and falls into the blanking pipe. During the blanking process, the blanking channel inside the auxiliary blanking block is not simultaneously connected to the interior of the furnace body and the blanking pipe. The lack of communication between the interior of the furnace body and the blanking pipe can reduce heat loss and improve the quality of the heat treatment of the ball blank.
[0014] Optionally, a first driving block and a second driving block are installed on the outer wall of the auxiliary blanking block, and the first driving block is located above the second driving block; the linkage member includes a driving rotating rod and a driving rotating wheel, and the driving rotating rod and the driving rotating wheel are respectively rotatably connected to the furnace body through a rotating shaft, and a torsion spring is installed between the driving rotating rod and the furnace body; the driving rotating rod has a first end and a second end, and the first end is equipped with a third driving block, and the third driving block can be against the second driving block to prevent the auxiliary blanking block from descending; the first rotating rod and the second rotating rod are installed on the outer peripheral wall of the driving rotating wheel, The end portion of the first rotating rod can be against the first driving block to drive the auxiliary blanking block to rise, and the end portion of the second rotating rod can be against the second end portion to drive the driving rotating rod to rotate; the linkage part also includes a first bevel gear, a second bevel gear, a third bevel gear, a fourth bevel gear and a connecting shaft, the first bevel gear is sleeved on the tail shaft, the second bevel gear is rotatably set in the furnace body and meshes with the first bevel gear, the third bevel gear and the second bevel gear rotate synchronously through the connecting shaft, the fourth bevel gear is fixedly mounted on the driving wheel and rotates synchronously with it, and the fourth bevel gear meshes with the third bevel gear By adopting the above technical solution, when the tail shaft drives the drum, the first bevel gear on the tail shaft rotates. This rotation drives the second bevel gear, which in turn drives the connecting shaft and the third bevel gear to rotate synchronously. The third bevel gear drives the fourth bevel gear, which in turn drives the drive wheel to rotate continuously clockwise. When the auxiliary material block is at its highest point, the first end is vertical, and the top wall of the third drive block abuts the bottom wall of the second drive block, preventing the auxiliary material block from descending. At this time, the second rotating rod approaches the second end from the lower right. The drive wheel continues to rotate, and the end of the second rotating rod abuts the second end, causing the driving rod to rotate counterclockwise. The third drive block disengages from the second drive block, and the auxiliary material block falls under the action of gravity. As the auxiliary material block falls, the third drive block slides along the outer wall of the auxiliary material block until it reaches its lowest point and stops. At this time, the first rotating rod approaches the first drive block from the lower right. The drive wheel continues to rotate, and the end of the first rotating rod abuts the first drive block, causing the auxiliary material block to rise. As the auxiliary material block ascends, the third drive block slides along its outer wall until the inclined surface of the second drive block engages with the inclined surface of the third drive block, driving the drive rod to rotate clockwise. Ultimately, the top wall of the third drive block abuts the bottom wall of the second drive block, causing the auxiliary material block to rest at its highest point. The linkage not only links the rotation of the drum with the reciprocating motion of the auxiliary material block, but also allows the auxiliary material block to rest at its highest and lowest points, facilitating the entry and exit of the ball blanks into and out of the material channel.
[0015] Optionally, the heating assembly includes multiple groups of main heating rods and auxiliary heating rods, and the furnace body is divided into multiple heating areas with different temperatures along the length direction of the roller. A group of main heating rods is arranged in each heating area, and the number of main heating rods in each group is different in different heating areas; a group of main heating rods includes heating rods arranged in the transverse direction and heating rods arranged in the longitudinal direction, and holes for inserting heating rods are provided on the top wall and side walls of the furnace body; the auxiliary heating rods are arranged at the discharge end, and heating holes are penetrated through the side walls of the Y-shaped channel body, and the length direction of the heating holes is arranged horizontally, and holes corresponding to the heating holes are opened on the side walls of the furnace body, and the auxiliary heating rods pass through the side walls of the furnace body in the horizontal direction and are inserted into the heating holes.
[0016] By adopting the above technical solution, an independent heating control area is set in the furnace body, which can achieve more precise temperature control; an independent heating control area is also formed in the Y-shaped channel body, which reduces the impact of the furnace temperature during the unloading process and further improves the quality of heat treatment.
[0017] Optionally, the double furnace door sealed feeding device includes a storage bin having a first channel door, an intermediate bin docked with the discharge end of the storage bin and having a second channel door, and a transmission channel for docking the intermediate bin with the feeding end of the furnace body, and the storage bin is located above the intermediate bin.
[0018] Optionally, the double furnace door sealed feeding device also includes a first feeding barrel and a second feeding barrel, the first feeding barrel is connected to the discharge end of the conveying channel, and a spiral feeding channel that can be connected to the spiral guide member is provided inside the first feeding barrel, the first feeding barrel is in the shape of a cone with an inner diameter gradually increasing from the feeding end to the second feeding barrel, the second feeding barrel extends horizontally from the first feeding barrel away from the feeding end to the inside of the drum, and the inside of the second feeding barrel is filled with a thermal insulation layer.
[0019] By adopting the above technical solution, during feeding, the first channel door opens and the second channel door closes. The lifting device of the preceding equipment controls the hopper to rise and dump the steel balls into the storage bin to complete the feeding. The lifting device's hopper then drops back down, the first channel door closes, and the second channel door opens. The steel balls fall under the action of gravity into the intermediate bin and then through the transfer channel into the first feed drum. When the first feed drum rotates to a position where the spiral feed channel connects to the spiral guide, the steel balls fall from the spiral feed channel into the spiral guide inside the drum.
[0020] In summary, this application includes at least one of the following beneficial technical effects: 1. During quenching, the heating component maintains the temperature in the furnace body at the set quenching temperature in different areas, and the double-door sealed feeding device delivers the ball blanks to the inside of the drum through the feeding end and the feeding port in batches and in a quantitative manner. The driving component drives the drum to rotate, and the spiral guide guides the ball blanks to move from the feeding port of the drum to the discharging port. When a batch of heated ball blanks moves to the discharging end, and the discharging port of the drum rotates to face downward, the steel balls automatically fall into the sealed blanking device, and the sealed blanking device delivers the heated ball blanks out of the furnace body in batches and in a quantitative manner for oil extraction. The present invention can achieve uninterrupted quenching, and due to the provision of the double-door sealed feeding device and the sealed blanking device, the sealing of the furnace body during feeding and unloading is improved, which improves the maintenance of the temperature in the furnace body compared to the prior art, and improves the quality and efficiency of heat treatment; 2. When the heated ball blank falls into the Y-shaped channel body, the auxiliary blanking block stops at its highest point, and the stop block is located at the top of the limiting groove. At this time, the upper end of the blanking channel is connected to the space surrounded by the Y-shaped channel body, and the lower end of the blanking channel is located in the rectangular channel body. The heated ball blank enters the blanking channel. During the rotation of the tail shaft drive roller, the auxiliary blanking block is driven to fall and stop at its lowest point through the linkage. The stop block is located at the bottom of the limiting groove, and the ball blank follows the auxiliary blanking block to fall. At this time, the lower end of the blanking channel is connected to the space surrounded by the blanking pipe, and the upper end of the blanking channel is located in the rectangular channel body. Under the action of gravity, the ball blank leaves the blanking channel and falls into the blanking pipe. During the blanking process, the blanking channel inside the auxiliary blanking block will not be connected to the inside of the furnace body and the blanking pipe at the same time. The fact that the inside of the furnace body is not connected to the blanking pipe can reduce heat loss and improve the quality of the heat treatment of the ball blank. 3. When the tail shaft drives the drum, the first bevel gear on the tail shaft rotates. This rotation drives the second bevel gear, which in turn drives the connecting shaft and the third bevel gear to rotate synchronously. The third bevel gear drives the fourth bevel gear, which in turn drives the drive wheel to rotate continuously clockwise. When the auxiliary material block rests at its highest point, the first end is vertical, and the top wall of the third drive block abuts the bottom wall of the second drive block, preventing the auxiliary material block from descending. At this time, the second rotating rod approaches the second end from the lower right. The drive wheel continues to rotate, and the end of the second rotating rod abuts the second end, causing the driving rod to rotate counterclockwise. The third drive block disengages from the second drive block, and the auxiliary material block falls under the action of gravity. As the auxiliary material block falls, the third drive block slides along the outer wall of the auxiliary material block until it reaches its lowest point and rests. At this time, the first rotating rod approaches the first drive block from the lower right. The drive wheel continues to rotate, and the end of the first rotating rod abuts the first drive block, causing the auxiliary material block to rise. As the auxiliary material block ascends, the third drive block slides along its outer wall until the inclined surface of the second drive block engages with the inclined surface of the third drive block, driving the drive rod to rotate clockwise. Ultimately, the top wall of the third drive block abuts the bottom wall of the second drive block, causing the auxiliary material block to rest at its highest point. The linkage not only links the rotation of the drum with the reciprocating motion of the auxiliary material block, but also allows the auxiliary material block to rest at its highest and lowest points, facilitating the entry and exit of the ball blanks into and out of the material channel. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a structural schematic diagram of a bearing steel ball quenching furnace according to an embodiment of the present application.
[0022] Figure 2 It is a schematic diagram of the cross-sectional structure of the furnace body of the embodiment of the present application.
[0023] Figure 3It is a structural schematic diagram of the double furnace door sealed feeding device of an embodiment of the present application.
[0024] Figure 4 It is a schematic diagram of the cross-sectional structure of the drum according to an embodiment of the present application.
[0025] Figure 5 It is a schematic cross-sectional structure diagram of the double furnace door sealed feeding device of an embodiment of the present application.
[0026] Figure 6 It is a schematic structural diagram of the driving component and the heating component of an embodiment of the present application.
[0027] Figure 7 It is a structural schematic diagram of the screw fine-tuning device of an embodiment of the present application.
[0028] Figure 8 It is a schematic structural diagram of the locking device of an embodiment of the present application.
[0029] Figure 9 It is a schematic structural diagram of the Y-shaped channel body, rectangular channel body and discharge pipe in an embodiment of the present application.
[0030] Figure 10 It is a schematic cross-sectional structure diagram of the sealing blanking device according to an embodiment of the present application.
[0031] Figure 11 It is a structural schematic diagram of the sealing blanking device of an embodiment of the present application.
[0032] Figure 12 It is a structural schematic diagram of the auxiliary blanking block in an embodiment of the present application.
[0033] Figure 13 It is a structural diagram of the linkage parts of the embodiment of the present application.
[0034] Explanation of reference numerals: 1. furnace body; 11. feeding end; 12. discharging end; 13. movable sealing cover; 14. thermal insulation material; 2. roller; 21. spiral guide member; 22. feeding port; 23. discharging port; 24. tail shaft; 3. driving assembly; 31. bearing roller; 32. supporting bearing; 33. support frame; 4. heating assembly; 41. main heating rod; 42. auxiliary heating rod; 5. double furnace door sealing feeding device; 51. storage bin; 52. intermediate bin; 53. transmission channel; 54. first channel door; 55. second channel door; 56. first feeding barrel; 57. second feeding barrel; 6. sealing blanking device; 61. Y-shaped channel body; 611 , heating hole; 62, rectangular channel body; 621, limiting groove; 63, unloading pipe; 64, auxiliary unloading block; 641, first driving block; 642, second driving block; 643, stop block; 644, unloading channel; 65, linkage; 651, driving rotating rod; 6511, first end; 6512, second end; 6513, third driving block; 652, driving wheel; 6521, first rotating rod; 6522, second rotating rod; 653, first bevel gear; 654, second bevel gear; 655, third bevel gear; 656, fourth bevel gear; 657, connecting shaft; 7, screw fine-tuning device; 8, locking device; 9, water cooling device. DETAILED DESCRIPTION
[0035] The following is combined with Figure 1 -Attached Figure 13 This application is described in further detail.
[0036] The embodiment of the present application discloses a bearing steel ball quenching furnace. Figure 1 and Figure 2 A bearing steel ball quenching furnace includes a furnace body 1 with a feed end 11 and a discharge end 12, a roller 2 is arranged in the furnace body 1 to rotate around an axis extending in the horizontal direction, the inner wall of the roller 2 is provided with a spiral guide member 21 spirally distributed along the length direction of the roller 2, and a feed port 22 and a discharge port 23 are respectively provided at both ends of the roller 2; a driving component 3 for driving the roller 2 to rotate is provided on the furnace body 1, a heating component 4 is provided between the outer side of the roller 2 and the inner wall of the furnace body 1, and the furnace body 1 is filled with insulation material 14, which includes insulation bricks and insulation cotton; the feed end 11 is located at one end of the furnace body 1, and the feed end 11 is provided with a double furnace door sealing feeding device 5, which sends the steel balls to the feed port 22 of the roller 2; the discharge end 12 is located at the other end of the furnace body 1, and the discharge end 12 is provided with a sealing blanking device 6, and is connected with the discharge port 23 of the roller 2.
[0037] During quenching, the heating assembly 4 maintains the temperature within the furnace body 1 at the set quenching temperature in different zones, and the double-door sealed feeding device 5 delivers the pellets to the interior of the drum 2 in batches and in a quantitative manner through the feeding end 11 and the feeding port 22. The driving assembly 3 drives the drum 2 to rotate, and the spiral guide 21 guides the pellets from the feeding port 22 of the drum 2 to the discharging port 23. When a batch of heated pellets moves to the discharging end 12 and the discharging port 23 of the drum 2 rotates to face downward, the steel balls automatically fall into the sealed blanking device 6. The sealed blanking device 6 delivers the heated pellets to the furnace body 1 in batches and in a quantitative manner through the discharging end 12 for oil extraction. The present invention can achieve uninterrupted quenching, and due to the provision of the double-door sealed feeding device 5 and the sealed blanking device 6, the sealing of the furnace body 1 during the feeding and unloading processes is improved, thereby improving the temperature maintenance in the furnace body 1 compared to the prior art and improving the quality and efficiency of the heat treatment.
[0038] Reference Figure 3 and Figure 4 The dual-door sealed feeding device 5 includes a storage bin 51 with a first access door 54, an intermediate bin 52 connected to the discharge end of the storage bin 51 and having a second access door 55, and a transfer channel 53 for connecting the intermediate bin 52 with the feed end 11 of the furnace body 1. The storage bin 51 is located above the intermediate bin 52. In this embodiment, the first and second access doors 54, 55 are controlled by pneumatic cylinders. When the first access door 54 is open, the second access door 55 is closed; when the second access door 55 is open, the first access door 54 is closed.
[0039] Reference Figure 4 and Figure 5 The double-door sealed feeding device 5 also includes a first feeding barrel 56 and a second feeding barrel 57. The first feeding barrel 56 is connected to the discharge end of the conveying channel 53. A spiral feeding channel is provided within the first feeding barrel 56, which is capable of communicating with the spiral flow guide 21. A notch is provided in the spiral feeding channel. The first feeding barrel 56 is shaped like a frustum with a gradually increasing inner diameter from the feeding end 11 of the furnace body 1 toward the second feeding barrel 57. The second feeding barrel 57 extends horizontally from the first feeding barrel 56, away from the feeding end 11, toward the interior of the drum 2. The interior of the second feeding barrel 57 is filled with a thermal insulation layer.
[0040] During feeding, the first channel door 54 opens and the second channel door 55 closes. The lifting device of the preceding equipment controls the hopper to rise and dump the steel balls into the storage bin 51 to complete the feeding. The hopper of the lifting device drops back down, the first channel door 54 closes, and the second channel door 55 opens. The steel balls fall into the intermediate bin 52 under the action of gravity and enter the first feeding drum 56 through the transfer channel 53. When the first feeding drum 56 rotates to a position where the spiral feeding channel connects to the spiral guide member 21, the steel balls fall from the spiral feeding channel into the spiral guide member 21 in the drum 2.
[0041] Reference Figure 6 The driving assembly 3 includes two load-bearing rollers 31 arranged side by side at one end of the furnace body 1 and rotating around their own axis, and a support bearing 32 installed at the other end of the furnace body 1. One end of the roller 2 is freely mounted on the two load-bearing rollers 31, and the other end of the roller 2 is installed with a tail shaft 24, which is rotatably set in the support bearing 32. A sprocket is installed on the tail shaft 24, and the sprocket is driven by a reducer installed outside the furnace body 1.
[0042] During normal operation, the reducer drives the tail shaft 24 to rotate through the sprocket, and the rotation of the tail shaft 24 drives the drum 2 to rotate. The drum 2 drives the two bearing rollers 31 to rotate under the action of friction. The three-point support structure can improve the stability of the rotation of the drum 2.
[0043] Reference Figure 6 、 Figure 7 and Figure 8 The two load-bearing rollers 31 are mounted on a support frame 33 rigidly connected to the furnace body 1. The support frame 33 is equipped with a screw fine-tuning device 7 and a locking device 8. During installation, the operator adjusts the position of the two load-bearing rollers 31 using the screw fine-tuning device 7 to adjust the left and right axis and height of the drum 2 axis, ensuring that the axis of the drum 2 is ultimately aligned with the center of the drum 2 axis, ensuring the stability of the drum 2 operation. The two load-bearing rollers 31 are rotatably mounted on the screw fine-tuning device 7, and the position of the two load-bearing rollers 31 is adjusted by the screw fine-tuning device 7.
[0044] When installing the load rollers 31, the operator adjusts the positions of the two load rollers 31 using the screw fine-tuning device 7 to adjust the left and right and height of the axis of the drum 2, ensuring that the axis of the drum 2 is ultimately aligned with the center of the drum 2, ensuring the stability of the operation of the drum 2. After adjustment, the position of the two load rollers 31 is fixed using the locking device 8 to prevent them from shifting during production.
[0045] Reference Figure 6 and Figure 8 One end of the load-bearing roller 31 protrudes from the furnace body 1 through a circular hole formed in the furnace body 1. A movable sealing cover 13 is mounted on the furnace body 1 to seal the connection between the load-bearing roller 31 and the furnace body 1. A water cooling device 9 is mounted on the movable sealing cover 13. The water cooling device 9 injects water into the interior of the load-bearing roller 31 through the end of the load-bearing roller 31 protruding from the furnace body 1 to cool the interior of the load-bearing roller 31.
[0046] The movable sealing cover 13 can reduce temperature loss at the connection between the load roller 31 and the furnace body 1, thereby improving the sealing of the furnace body 1. The load roller 31 is hollow. During use, the water cooling device 9 continuously injects room temperature water into the load roller 31 through a water pump toward the end of the load roller 31 protruding from the furnace body 1, thereby cooling the load roller 31 and preventing it from overheating.
[0047] Reference Figure 9 and Figure 10 The sealed blanking device 6 includes a Y-shaped channel body 61, the upper end of the Y-shaped channel body 61 is open and connected to the discharge port 23 of the drum 2. A rectangular channel body 62 is provided below the Y-shaped channel body 61, and the upper end of the rectangular channel body 62 is connected to the lower end of the Y-shaped channel body 61. The Y-shaped channel body 61 and the rectangular channel body 62 are arranged in the furnace body 1, and the Y-shaped channel body 61 and the rectangular channel body 62 are surrounded by heavy wear-resistant alumina prefabricated bricks. A discharge pipe 63 is provided below the rectangular channel body 62, and the discharge pipe 63 is sealed with the discharge end 12 by a flange, and the lower end of the discharge pipe 63 is inserted below the oil level of the quenching tank to form an oil seal. A group of slit oil curtain nozzles are provided on the front and rear sides of the lower end of the discharge pipe 63, and the slit oil curtain nozzles are supplied with oil through a circulating pump to form a cross oil curtain.
[0048] Reference Figure 11 and Figure 12 The sealing blanking device 6 also includes an auxiliary blanking block 64 and a linkage member 65 for driving the auxiliary blanking block 64. The auxiliary blanking block 64 is lifted and lowered in the Y-shaped channel body 61, the rectangular channel body 62 and the blanking pipe 63. The linkage member 65 is connected to the tail shaft 24. The tail shaft 24 rotates through the linkage member 65 to drive the auxiliary blanking block 64 to perform reciprocating lifting and lowering motion.
[0049] The auxiliary blanking block 64 is vertically inserted into the rectangular channel body 62, with its outer wall abutting against the inner wall of the rectangular channel body 62. A vertical blanking channel 644 is defined within the auxiliary blanking block 64, and its height is greater than that of the rectangular channel body 62. A stop block 643 is mounted on the outer wall of the auxiliary blanking block 64, and a limit slot 621 is defined on the inner wall of the rectangular channel body 62. The stop block 643 is positioned within the limit slot 621 for elevation.
[0050] When the heated ball blank falls into the Y-shaped channel body 61, the auxiliary blanking block 64 stops at its highest point, and the stopper 643 is located at the top of the limiting groove 621. At this moment, the upper end of the blanking channel 644 is communicated with the space surrounded by the Y-shaped channel body 61, and the lower end of the blanking channel 644 is located in the rectangular channel body 62, and the heated ball blank enters the blanking channel 64. During the rotation of the tail shaft 24 driving the drum 2, the auxiliary blanking block 64 is driven to fall and stop at its lowest point by the linkage 65. The stopper 643 is located at the bottom of the limiting groove 621, and the ball blank falls following the auxiliary blanking block 64. At this moment, the lower end of the blanking channel 644 is communicated with the space surrounded by the blanking pipe 63. The upper end of the blanking channel 644 is located in the rectangular channel body 62, and the ball blank leaves the blanking channel 644 under gravity and falls into the blanking pipe 63. During the blanking process, the blanking channel 644 inside the auxiliary blanking block 64 will not be connected to the inside of the furnace body 1 and the blanking pipe 63 at the same time. The lack of connection between the inside of the furnace body 1 and the blanking pipe 63 can reduce heat loss and improve the quality of heat treatment of the pellets.
[0051] Reference Figure 12 A first driving block 641 and a second driving block 642 are mounted on the outer wall of the auxiliary material removal block 64. The first driving block 641 is located above the second driving block 642. The cross-sections of the first driving block 641 and the second driving block 642 are both triangular. The linkage 65 includes a driving rod 651 and a driving wheel 652. The driving rod 651 and the driving wheel 652 are respectively rotatably connected to the furnace body 1 via a rotating shaft. A torsion spring is installed between the driving rod 651 and the furnace body 1. The driving rod 651 has a first end 6511 and a second end 6512. The first end 6511 is mounted with a third driving block 6513. The third driving block 6513 can abut against the second driving block 642 to prevent the auxiliary material removal block 64 from descending. The third driving block 6513 has a triangular cross-section, and the inclined surface of the third driving block 6513 matches the inclined surface of the second driving block 642. A first rotating rod 6521 and a second rotating rod 6522 are mounted along the outer peripheral wall of the driving wheel 652, extending along its thickness. An angle is formed between the first rotating rod 6521 and the second rotating rod 6522. The end of the first rotating rod 6521 can abut against the first driving block 641 to drive the auxiliary unloading block 64 upward. The sidewall of the end of the first rotating rod 6521 is arc-shaped. The end of the second rotating rod 6522 can abut against the second end 6512 to drive the driving rotating rod 651 to rotate.
[0052] Reference Figure 12 and Figure 13The linkage 65 also includes a first bevel gear 653, a second bevel gear 654, a third bevel gear 655, a fourth bevel gear 656 and a connecting shaft 657. The first bevel gear 653 is sleeved on the tail shaft 24, the second bevel gear 654 is rotatably set in the furnace body 1 and meshes with the first bevel gear 653, the third bevel gear 655 and the second bevel gear 654 rotate synchronously through the connecting shaft 657, the fourth bevel gear 656 is fixedly mounted on the driving wheel 652 and rotates synchronously with it, and the fourth bevel gear 656 is meshed with the third bevel gear 655.
[0053] When the tail shaft 24 drives the drum 2 to rotate, the first bevel gear 653 on the tail shaft 24 rotates, and the rotation of the first bevel gear 653 drives the second bevel gear 654 to rotate, and the second bevel gear 654 drives the connecting shaft 657 and the third bevel gear 655 to rotate synchronously, and the rotation of the third bevel gear 655 drives the fourth bevel gear 656 to rotate, and the rotation of the fourth bevel gear 656 drives the driving wheel 652 to rotate continuously clockwise.
[0054] When the auxiliary material removal block 64 rests at its highest point, the first end 6511 is in a vertical position, and the top wall of the third drive block 6513 abuts the bottom wall of the second drive block 642, preventing the auxiliary material removal block 64 from descending. At this time, the second rotating rod 6522 approaches the second end 6512 from the lower right. The driving wheel 652 continues to rotate, and the end of the second rotating rod 6522 abuts the second end 6512, causing the driving rotating rod 651 to rotate counterclockwise. The third drive block 6513 disengages from the second drive block 642, and the auxiliary material removal block 64 falls under the action of gravity. As the auxiliary material removal block 64 falls, the third drive block 6513 slides along the outer wall of the auxiliary material removal block 64 until the auxiliary material removal block 64 reaches its lowest point and rests. At this point, the first rotating rod 6521 approaches the first driving block 641 from the lower right, driving the rotating wheel 652 to continue rotating. The end of the first rotating rod 6521 abuts against the first driving block 641, causing the auxiliary material removal block 64 to rise. During the ascent of the auxiliary material removal block 64, the third driving block 6513 slides along the outer wall of the auxiliary material removal block 64 until the inclined surface of the second driving block 642 slidably engages with the inclined surface of the third driving block 6513, driving the rotating driving rod 651 to rotate clockwise. Finally, the top wall of the third driving block 6513 abuts against the bottom wall of the second driving block 642, and the auxiliary material removal block 64 stops at its highest point.
[0055] The setting of the linkage member 65 not only links the rotation of the drum 2 with the reciprocating motion of the auxiliary blanking block 64, but also enables the auxiliary blanking block 64 to stay at its highest point and lowest point, making it easier for the ball blank to enter and leave the blanking channel 644.
[0056] Reference Figure 6The heating assembly 4 includes multiple groups of main heating rods 41 and auxiliary heating rods 42. The furnace body 1 is divided into multiple heating zones with different temperatures along the length of the drum 2. In this embodiment, the furnace body 1 is divided into three independent heating zones with different temperatures along the length of the drum 2. Each heating zone is provided with a group of main heating rods 41, and the number of main heating rods 41 in each group varies from heating zone to heating zone. A group of main heating rods 41 includes heating rods arranged horizontally and heating rods arranged vertically. Holes for inserting the heating rods are provided in the top and side walls of the furnace body 1.
[0057] Auxiliary heating rod 42 is positioned at discharge end 12. Heating holes 611 are formed through the sidewall of Y-shaped channel 61. The length of heating holes 611 is arranged horizontally. A hole corresponding to heating hole 611 is formed in the sidewall of furnace body 1. Auxiliary heating rod 42 passes horizontally through the sidewall of furnace body 1 and is inserted into heating hole 611. An independent heating control zone is also formed in Y-shaped channel 61, reducing the impact of material discharge on furnace temperature and further improving the quality of heat treatment.
[0058] The implementation principle of a bearing steel ball quenching furnace according to an embodiment of the present application is as follows: during quenching, multiple groups of main heating rods 41 and auxiliary heating rods 42 maintain the temperature in the furnace body 1 at a set quenching temperature in different areas. Sealed feeding is achieved by the cooperation of the first channel door 54 and the first channel door 54, thereby reducing heat loss during the feeding process. The three-point support structure composed of two load-bearing rollers 31 and a support bearing 32 can improve the rotation stability of the drum 2. The spiral guide 21 guides the ball blank to move from the feed port 22 of the drum 2 to the discharge port 23. When the discharge port 23 of the drum 2 rotates to face downward, the heated ball blank falls into the Y-shaped channel body 61, the auxiliary unloading block 64 stays at its highest point, and the heated ball blank enters the unloading channel 644. During the rotation of the drum 2 driven by the tail shaft 24, the auxiliary unloading block 64 is driven to fall and stay at its lowest point through the linkage 65. Under the action of gravity, the pellets leave the unloading channel 644 and fall into the unloading pipe 63, and are sent out of the furnace body 1 through the discharge end 12 for oil extraction. During the unloading process, the unloading channel 644 inside the auxiliary unloading block 64 will not be connected to the interior of the furnace body 1 and the unloading pipe 63 at the same time. The lack of connection between the interior of the furnace body 1 and the unloading pipe 63 can reduce heat loss and improve the quality of the heat treatment of the pellets. The present invention can achieve uninterrupted quenching, and due to the provision of the double furnace door sealed feeding device 5 and the sealed unloading device 6, the sealing of the furnace body 1 during the feeding and unloading process is improved. Compared with the prior art, the temperature inside the furnace body 1 is maintained better, thereby improving the quality and efficiency of the heat treatment.
[0059] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.
Claims
1. A bearing steel ball quenching furnace, characterized by: The invention comprises a furnace body (1) having a feeding end (11) and a discharging end (12); a roller (2) is provided in the furnace body (1) so as to rotate around an axis extending in a horizontal direction; a spiral guide member (21) is provided on the inner wall of the roller (2) and is distributed in a spiral manner along the length direction of the roller (2); a feeding port (22) and a discharging port (23) are provided at both ends of the roller (2); a driving component (3) for driving the roller (2) to rotate is provided on the furnace body (1); a heating component (4) is provided between the outer side of the roller (2) and the inner wall of the furnace body (1); The feed end (11) is located at one end of the furnace body (1), and the feed end (11) is provided with a double furnace door sealing feed device (5), and the double furnace door sealing feed device (5) sends the steel balls to the feed port (22) of the drum (2) through the feed end (11); The discharge end (12) is located at the other end of the furnace body (1), and the discharge end (12) is provided with a sealed blanking device (6) and is communicated with the discharge port (23) of the roller (2).
2. The bearing steel ball quenching furnace according to claim 1, characterized in that: The driving assembly (3) comprises two load-bearing rollers (31) arranged side by side at one end of the furnace body (1) and rotating around their own axis, and a support bearing (32) installed at the other end of the furnace body (1); one end of the roller (2) is freely mounted on the two load-bearing rollers (31); the other end of the roller (2) is installed with a tail shaft (24); the tail shaft (24) is rotatably arranged in the support bearing (32); a sprocket is installed on the tail shaft (24); and the sprocket is driven by a reducer installed outside the furnace body (1); The two bearing rollers (31) are arranged on a support frame (33) rigidly connected to the furnace body (1); a screw fine-tuning device (7) and a locking device (8) are provided on the support frame (33); and the positions of the two bearing rollers (31) are adjusted by the screw fine-tuning device (7).
3. The bearing steel ball quenching furnace according to claim 2, characterized in that: One end of the load-bearing roller (31) protrudes from the furnace body (1) through a circular hole provided on the furnace body (1); a movable sealing cover (13) is installed on the furnace body (1) for sealing the connection between the load-bearing roller (31) and the furnace body (1); a water cooling device (9) is provided on the movable sealing cover (13); the water cooling device (9) injects water into the interior of the load-bearing roller (31) through one end of the load-bearing roller (31) protruding from the furnace body (1) to cool the interior of the load-bearing roller (31).
4. The bearing steel ball quenching furnace according to claim 2, characterized in that: The sealed blanking device (6) comprises a Y-shaped channel body (61), a rectangular channel body (62) and a discharge pipe (63), wherein the Y-shaped channel body (61) and the rectangular channel body (62) are arranged in the furnace body (1), and the discharge pipe (63) is sealed and connected to the discharge end (12) through a flange; the upper end of the Y-shaped channel body (61) is communicated with the discharge port (23) of the roller (2), and the upper end of the rectangular channel body (62) is communicated with the lower end of the Y-shaped channel body (61), and the Y-shaped channel body (61) and the rectangular channel body (62) are surrounded by heavy wear-resistant alumina prefabricated molding bricks; the lower end of the discharge pipe (63) is inserted below the oil level of the quenching tank to form an oil seal; a group of slit oil curtain nozzles are respectively arranged on the front and rear sides of the lower end of the discharge pipe (63), and the slit oil curtain nozzles are supplied with oil through a circulating pump to form a cross oil curtain.
5. The bearing steel ball quenching furnace according to claim 4, characterized in that: The sealing blanking device (6) further comprises an auxiliary blanking block (64) and a linkage member (65) for driving the auxiliary blanking block (64); the auxiliary blanking block (64) is arranged to be lifted and lowered in the Y-shaped channel body (61), the rectangular channel body (62) and the blanking pipe (63); the linkage member (65) is connected to the tail shaft (24); the tail shaft (24) rotates through the linkage member (65) to drive the auxiliary blanking block (64) to perform reciprocating lifting motion; The auxiliary material removal block (64) is vertically inserted into the rectangular channel body (62), and the outer wall of the auxiliary material removal block (64) is in contact with the inner wall of the rectangular channel body (62). A material removal channel (644) arranged in the vertical direction is provided inside the auxiliary material removal block (64). The height of the material removal channel (644) is greater than the height of the rectangular channel body (62). When the upper end of the material removal channel (644) is connected to the space surrounded by the Y-shaped channel body (61), the material removal channel (644) is in contact with the inner wall of the rectangular channel body (62). The lower end of the channel (644) is located in the rectangular channel body (62); when the lower end of the material discharge channel (644) is connected to the space surrounded by the material discharge pipe (63), the upper end of the material discharge channel (644) is located in the rectangular channel body (62); a stop block (643) is installed on the outer wall of the auxiliary material discharge block (64); a limiting groove (621) is provided on the inner wall of the rectangular channel body (62), and the stop block (643) is raised and lowered in the limiting groove (621).
6. The bearing steel ball quenching furnace according to claim 5, characterized in that: A first driving block (641) and a second driving block (642) are installed on the outer side wall of the auxiliary unloading block (64), and the first driving block (641) is located above the second driving block (642); the linkage member (65) includes a driving rotating rod (651) and a driving rotating wheel (652), and the driving rotating rod (651) and the driving rotating wheel (652) are respectively connected to the furnace body (1) in rotation via a rotating shaft, and a torsion spring is installed between the driving rotating rod (651) and the furnace body (1); the driving rotating rod (651) has a first end portion (6511) and a second end portion (6512), and the The first end portion (6511) is provided with a third driving block (6513), and the third driving block (6513) can abut against the second driving block (642) to prevent the auxiliary material removal block (64) from descending; a first rotating rod (6521) and a second rotating rod (6522) are provided on the outer peripheral wall of the driving wheel (652), and the end portion of the first rotating rod (6521) can abut against the first driving block (641) to drive the auxiliary material removal block (64) to ascend, and the end portion of the second rotating rod (6522) can abut against the second end portion (6512) to drive the driving rotating rod (651) to rotate; The linkage member (65) further comprises a first bevel gear (653), a second bevel gear (654), a third bevel gear (655), a fourth bevel gear (656) and a connecting shaft (657); the first bevel gear (653) is sleeved on the tail shaft (24); the second bevel gear (654) is rotatably arranged in the furnace body (1) and meshes with the first bevel gear (653); the third bevel gear (655) and the second bevel gear (654) rotate synchronously via the connecting shaft (657); the fourth bevel gear (656) is fixedly mounted on the driving wheel (652) and rotates synchronously therewith; the fourth bevel gear (656) meshes with the third bevel gear (655).
7. The bearing steel ball quenching furnace according to claim 5, characterized in that: The heating assembly (4) includes multiple groups of main heating rods (41) and auxiliary heating rods (42), and the furnace body (1) is divided into multiple heating areas with different temperatures along the length direction of the roller (2). A group of main heating rods (41) is arranged in each heating area, and the number of main heating rods (41) in each group is different in different heating areas; a group of main heating rods (41) includes heating rods arranged in the transverse direction and heating rods arranged in the longitudinal direction, and holes for inserting heating rods are opened on the top wall and side wall of the furnace body (1); the auxiliary heating rods (42) are arranged at the discharge end (12), and a heating hole (611) is opened through the side wall of the Y-shaped channel body (61), and the length direction of the heating hole (611) is arranged horizontally. A hole corresponding to the heating hole (611) is opened on the side wall of the furnace body (1), and the auxiliary heating rod (42) passes through the side wall of the furnace body (1) in the horizontal direction and is inserted into the heating hole (611).
8. The bearing steel ball quenching furnace according to claim 1, characterized in that: The double furnace door sealed feeding device (5) comprises a storage bin (51) having a first channel door (54), an intermediate bin (52) docked with the discharge end of the storage bin (51) and having a second channel door (55), and a transmission channel (53) for docking the intermediate bin (52) with the feeding end (11) of the furnace body (1), wherein the storage bin (51) is located above the intermediate bin (52).
9. The bearing steel ball quenching furnace according to claim 8, characterized in that: The double furnace door sealed feeding device (5) also includes a first feeding barrel (56) and a second feeding barrel (57), the first feeding barrel (56) is connected to the discharge end (12) of the conveying channel (53), and a spiral feeding channel capable of being connected to the spiral guide member (21) is provided inside the first feeding barrel (56), the first feeding barrel (56) is in the shape of a cone with an inner diameter gradually increasing from the feeding end (11) to the second feeding barrel (57), the second feeding barrel (57) is horizontally extended from the first feeding barrel (56) away from the feeding end (11) to the inside of the drum (2), and the inside of the second feeding barrel (57) is filled with a thermal insulation layer.