A half shaft high-frequency quenching production line

Abstract

The present invention discloses a high-frequency quenching production line for half shafts, which includes a feeding device for placing workpieces to be processed, a processing device arranged on one side of the feeding device for quenching processing, a material receiving device arranged on one side of the processing device for receiving finished products, and a PLC control system capable of controlling the operation of the feeding device and the processing device. The feeding device includes a blank holder, a loading mechanism and a material distribution mechanism arranged on the blank holder. The processing device includes a frame, and a high-frequency heating machine, a spraying device, a coding device and an anti-rust treatment device are sequentially arranged at the upper end of the frame. A conveying device is also arranged on the frame. An axial positioning mechanism is arranged between the feeding device and the processing device. The present invention provides a high-frequency quenching production line for half shafts, which can realize full-automatic heat treatment processing of half shafts, save labor costs, ensure the unity or stability of the quality of half shafts, and is suitable for large-batch processing and use.

Description

Technical Field

[0001] The invention relates to the technical field of half-shaft production equipment, and in particular to a half-shaft high-frequency quenching production line. Background Art

[0002] Quenching is a heat treatment process that heats steel to above the critical temperature, keeps it at that temperature for a certain period of time, and then cools it at a rate greater than the critical cooling rate to obtain an unbalanced structure dominated by martensite (or bainite or single-phase austenite can be obtained as needed). Quenching is the most widely used process in steel heat treatment.

[0003] The half-shaft, also called the drive shaft, is the shaft that connects the differential to the drive wheel. The splines and threads on the half-shaft are usually heat treated by quenching to enhance their strength. However, the existing half-shaft processing process usually involves heating the half-shaft first, then quenching it directly in water, and then manually aligning the quenched half-shafts, and then uniformly subjecting them to oil injection treatment. This operation method is inefficient, the quality is difficult to control, and mass production is not possible. Summary of the invention

[0004] The present invention provides a semi-axle high-frequency quenching production line, which can realize full-automatic semi-axle heat treatment processing, save labor costs, improve the processing quality of the semi-axle, and is easy to control and analyze, thereby ensuring uniform or stable quality of the semi-axle, and is suitable for large-scale processing.

[0005] A semi-axle high-frequency quenching production line, comprising a feeding device for placing workpieces to be processed, a processing device arranged on one side of the feeding device for quenching processing, a receiving device arranged on one side of the processing device for receiving finished products, and a PLC control system capable of controlling the operation of the feeding device and the processing device;

[0006] The feeding device comprises a material placing rack, a loading mechanism arranged on the material placing rack, and a material distributing mechanism for transferring the workpiece to the processing device. The placing surface of the material placing rack is arranged obliquely, and the horizontal height close to the loading mechanism end is lower than the horizontal height away from the loading mechanism end.

[0007] The processing device comprises a frame, and a high-frequency heating machine for heating the end of the workpiece, a spraying device for cooling the heated workpiece, a coding device for marking the workpiece, and an anti-rust treatment device capable of rust-proofing the surface of the half-shaft are arranged in sequence on the upper end of the frame, and a conveying device for conveying the workpiece for flow processing is also arranged on the frame;

[0008] An axial positioning mechanism for aligning the workpieces is arranged between the feeding device and the processing device.

[0009] Preferably, the loading mechanism includes a material supporting plate capable of longitudinally sliding on the side close to the processing device within the loading rack and a first oil cylinder capable of driving the material supporting plate to longitudinally lift and lower. The telescopic end of the first oil cylinder is fixedly connected to the lower end of the material supporting plate.

[0010] Preferably, the material separating mechanism includes a material separating rack connected to the loading rack. On the side of the material separating rack away from the loading rack, there are a guiding plate for guiding the workpiece into the processing device and a lifting mechanism capable of transferring the workpiece on the material separating rack to the guiding plate. The end of the workpiece placement surface on the material separating rack close to the loading rack is higher than the end where the lifting mechanism is located. The lifting mechanism includes a material blocking plate connected to the material separating rack, an L-shaped lifting plate capable of longitudinally sliding on the material blocking plate, and a second oil cylinder arranged on the material blocking plate for controlling the movement of the L-shaped lifting plate. The telescopic end of the second oil cylinder is fixedly connected to the L-shaped lifting plate. The length of one side of the L-shaped lifting plate extending towards the material separating rack on the material blocking plate is greater than the diameter distance of a semi-axis.

[0011] Preferably, the conveying device includes a chain conveyor and a number of V-shaped material supporting racks evenly arranged on the chain conveyor.

[0012] Preferably, the spraying device includes a water storage tank arranged directly below the conveying device, and a housing connected to the water storage tank and covering the conveying device. On both the upper and lower sides of the conveying device within the housing, there are first nozzles arranged. A circulation pump is arranged in the water storage tank and is connected to all the first nozzles through water pipes.

[0013] Preferably, the coding device includes a first gantry connected to the upper end of the machine frame. The first gantry covers the conveying device, and a laser coding machine is arranged on the cross arm of the first gantry.

[0014] Preferably, the rust prevention treatment device includes a U-shaped structure housing fixedly connected to the upper end of the machine frame. At one end of the housing close to the coding device, there is a material blocking rack with the same size as the first gantry. The size of the housing is larger than that of the material blocking rack. Second nozzles and third nozzles are arranged on both the two vertical rods and the cross bar of the housing. An air pump and an oil tank are arranged on the machine base. The air pump is connected to the second nozzles through pipelines. An oil pump is arranged in the oil tank, and the oil pump is connected to the third nozzles through pipelines. Solenoid valves are arranged at the ends of the second nozzles and the third nozzles communicating with the pipelines.

[0015] Preferably, the axial positioning mechanism includes a third gantry fixedly connected to the upper end of the machine base. Two clamping plates are slidably arranged on the cross bar of the third gantry. Tooth plates are arranged on both clamping plates, and the two tooth plates are arranged in parallel. A driving mechanism capable of driving the two clamping plates to move synchronously and in opposite directions on the cross bar is arranged at the center of the cross bar of the third gantry.

[0016] Preferably, the driving mechanism includes a driving motor and a gear arranged at the output end of the driving motor, and the gear is meshed and connected with two toothed plates.

[0017] Preferably, the material receiving device includes a material receiving frame, and a material receiving plate is obliquely arranged on the material receiving frame. The horizontal height of one end of the material receiving plate close to the processing device is higher than that of the other end, and baffle plates are arranged on both sides of the material receiving plate.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] It realizes fully automatic heat treatment processing of half shafts, saves labor costs, improves the processing quality of half shafts, is easy to control and analyze, ensures the unity or stability of the quality of half shafts, and can be processed and used in large quantities. Description of the Drawings

[0020] Figure 1 It is a schematic diagram of the processing structure of the production line of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the feeding device of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of the spraying device of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of the coding device of the present invention;

[0024] Figure 5 It is a schematic diagram of the structure of the rust prevention treatment device of the present invention;

[0025] Figure 6 It is a schematic diagram of the structure of the axial positioning mechanism of the present invention;

[0026] Figure 7 For Figure 6 the bottom view (the frame is transparent).

[0027] Description of the Reference Numerals:

[0028] 1 - material placing frame, 2 - frame, 3 - high-frequency heating machine, 4 - supporting plate, 5 - first oil cylinder, 6 - material distributing frame, 7 - guiding plate, 8 - material blocking plate, 9 - L-shaped lifting plate, 10 - second oil cylinder, 11 - chain conveyor, 12 - V-shaped supporting frame, 13 - reservoir, 14 - outer shell, 15 - first nozzle, 16 - circulation pump, 17 - first gantry, 18 - laser coding machine, 19 - housing, 20 - material blocking frame, 21 - second nozzle, 23 - air pump, 24 - fuel tank, 25 - third nozzle, 26 - oil pump, 27 - solenoid valve, 28 - third gantry, 29 - clamping plate, 30 - toothed plate, 31 - driving motor, 32 - gear, 33 - material receiving frame, 34 - material receiving plate, 35 - baffle plate. Detailed implementation mode

[0029] The following will combine with the attached drawings to describe in detail a specific implementation mode of the present invention. However, it should be understood that the protection scope of the present invention is not limited by the specific implementation mode.

[0030] As Figures 1-7 shown, a half shaft high-frequency quenching production line includes a feeding device for placing workpieces to be processed, a processing device arranged on one side of the feeding device for quenching processing, a receiving device arranged on one side of the processing device for receiving finished products, and a PLC control system capable of controlling the operation of the feeding device and the processing device. The whole process from half shaft feeding to quenching heat treatment processing and then being collected by the receiving device is automatically controlled, saving the input of manpower and being beneficial to improving the stability of product quality.

[0031] The feeding device includes a material placing rack 1, a feeding mechanism arranged on the material placing rack 1, and a material distributing mechanism for transferring the workpiece to the processing device. The placing surface of the material placing rack 1 is inclined, and the horizontal height of the end close to the feeding mechanism is lower than the horizontal height of the end far from the feeding mechanism. The half shaft workpiece will automatically move upward along the inclined plane on the material placing rack 1 towards the end where the feeding mechanism is located, facilitating the feeding mechanism to transfer the workpiece.

[0032] Specifically, the feeding mechanism includes a supporting plate 4 that can longitudinally slide on the side close to the processing device inside the material placing rack 1, and a first oil cylinder 5 that can drive the supporting plate 4 to longitudinally lift and lower. The telescopic end of the first oil cylinder 5 is fixedly connected to the lower end of the supporting plate 4. The first oil cylinder 5 controls the up and down movement of the supporting plate 4 to lift and convey the half shaft above the supporting plate 4 to the material distributing mechanism.

[0033] Specifically, the material distributing mechanism includes a material distributing rack 6 connected to the material feeding rack 1. On one side of the material distributing rack 6 away from the material feeding rack 1, there are arranged a guiding plate 7 for guiding the workpiece into the processing device and a lifting mechanism capable of transferring the workpiece on the material distributing rack 6 to the guiding plate 7. One end of the workpiece placing surface on the material distributing rack 6 close to the material feeding rack 1 is higher than the end where the lifting mechanism is located. The half shaft workpiece is lifted by the supporting plate 4 to reach the material distributing rack 6. Due to the inclination of the placing surface, the half shaft workpiece will automatically roll to the position of the lifting mechanism. The lifting mechanism includes a blocking plate 8 connected to the material distributing rack 6, an L-shaped lifting plate 9 capable of longitudinally sliding on the blocking plate 8, and a second oil cylinder 10 arranged on the blocking plate 8 for controlling the movement of the L-shaped lifting plate 9. The telescopic end of the second oil cylinder 10 is fixedly connected to the L-shaped lifting plate 9. The length of one side of the L-shaped lifting plate 9 extending towards the material distributing rack 6 on the blocking plate 8 is greater than the diameter distance of one half shaft. When the half shaft workpiece freely rolls on the material distributing rack 6, it is blocked by the blocking plate 8. The second oil cylinder 10 drives the L-shaped lifting plate 9 to lift the half shaft workpiece blocked by the blocking plate 8. The half shaft moves above the guiding plate 7 on the L-shaped lifting plate 9 and then enters the processing device under the guidance of the guiding plate 7, thus realizing the material distribution of the half shaft workpiece.

[0034] The processing device includes a machine frame 2. At the upper end of the machine frame 2, there are successively arranged a high-frequency heating machine 3 for heating the end of the workpiece, a spraying device for cooling the heated workpiece, a coding device for marking the workpiece, and an anti-rust treatment device capable of performing anti-rust treatment on the surface of the half shaft. On the machine frame 2, there is also arranged a conveying device for conveying the workpiece for flow processing.

[0035] Specifically, the conveying device includes a chain conveyor 11 and a number of V-shaped supporting racks 12 evenly arranged on the chain conveyor 11. The guiding plate 7 guides the half shaft workpiece to fall on the V-shaped supporting racks 12.

[0036] Specifically, the spraying device includes a water storage tank 13 arranged directly below the conveying device, and a housing 14 connected to the water storage tank 13 and covering the conveying device. On both the upper and lower sides of the conveying device inside the housing 14, there are arranged first nozzles 15. Inside the water storage tank 13, there is arranged a circulation pump 16 connected to all the first nozzles 15 through water pipes. The circulation pump 16 pumps out the water in the water storage tank 13 and sprays it onto the heating end of the half shaft workpiece through the first nozzles 15 to perform surface heat treatment on the half shaft workpiece. The sprayed water splashes into the water storage tank 13 to store water and form a water cycle.

[0037] Specifically, the coding device includes a first gantry 17 connected to the upper end of the machine frame 2. The first gantry 17 covers the conveying device. On the cross arm of the first gantry 17, there is arranged a laser coding machine 18. The laser coding machine 18 performs laser coding on the half shaft workpiece conveyed directly below the first gantry 17.

[0038] Specifically, the rust prevention treatment device includes a U-shaped structure housing 19 fixedly connected to the upper end of the frame 2. A material blocking frame 20 with the same size as the first gantry 17 is arranged at one end of the housing 19 close to the coding device. The size of the housing 19 is larger than that of the material blocking frame 20. Second nozzles 21 and third nozzles 25 are arranged on both the vertical rods and the cross bar of the housing 19. An air pump 23 and an oil tank 24 are arranged on the frame 2. The air pump 23 is communicated with the second nozzles 21 through a pipeline. An oil pump 26 is arranged in the oil tank 24. The oil pump 26 is communicated with the third nozzles 25 through a pipeline. Solenoid valves 27 are arranged at one ends of the second nozzles 21 and the third nozzles 25 that are communicated with the pipeline. By respectively controlling the two solenoid valves 27, the second nozzles 21 and the third nozzles 25 are opened or closed. When the solenoid valve 27 on the pipeline where the oil pump 26 is located is opened, the oil pump 26 sprays the oil in the oil tank 24 onto the surface of the half shaft workpiece through the third nozzles 25 to perform oil coating and rust prevention treatment on the half shaft workpiece. When the solenoid valve 27 on the pipeline where the air pump 23 is located is opened, the air pump 23 sprays gas onto the half shaft workpiece through the second nozzles 21 to dry the water marks on the surface of the half shaft and prevent the half shaft from rusting.

[0039] An axial positioning mechanism for aligning the workpieces is arranged between the feeding device and the processing device to uniformly position the half shaft workpieces entering the processing device and improve the processing quality of the processing device.

[0040] Specifically, the axial positioning mechanism includes a third gantry 28 fixedly connected to the upper end of the frame 2. Two clamping plates 29 are slidably arranged on the cross bar of the third gantry 28. Tooth plates 30 are arranged on both of the two clamping plates 29. The two tooth plates 30 are arranged in parallel. A driving mechanism capable of driving the two clamping plates 29 to move synchronously and reversely on the cross bar is arranged at the center of the cross bar of the third gantry 28.

[0041] Specifically, the driving mechanism includes a driving motor 31 and a gear 32 arranged at the output end of the driving motor 31. The gear 32 is meshed and connected with the two tooth plates 30.

[0042] The driving motor 31 drives the gear 32 to rotate forward and backward. The forward and backward rotation of the gear 23 simultaneously drives the two tooth plates 30 to move synchronously and reversely, thereby driving the two clamping plates 29 to move synchronously towards the center or synchronously towards both sides. When the two clamping plates 29 move synchronously towards the center, the axial position of the half shaft is positioned to ensure that the half shaft accurately enters the processing position of the processing device and improve the processing quality.

[0043] Specifically, the material receiving device includes a material receiving rack 33, on which a material receiving plate 34 is inclinedly arranged. The horizontal height of the material receiving plate 34 at the end close to the processing device is higher than that at the other end. Baffle plates 35 are arranged on both sides of the material receiving plate 34. The conveying device conveys the processed half shaft workpieces to the material receiving plate 34 for collection. The baffle plates 35 play a role in guiding the straight movement of the half shafts to prevent the half shafts from falling off the material receiving plate 34.

[0044] When the present invention is in use, the PLC control system is set according to the workpiece processing requirements to regulate the control of the feeding device and the processing device. The half shaft workpieces that need to be heat treated are stacked on the feeding rack 1. The feeding mechanism lifts and conveys the half shaft workpieces on the feeding rack 1 to the material distributing mechanism. At this time, the half shafts are arranged in a single layer on the material distributing rack 6. Then, the lifting mechanism lifts a single half shaft to the guiding plate 7. When the lifting mechanism descends, the half shaft workpiece on the guiding plate 7 falls onto the V-shaped material supporting rack 12 on the chain conveyor 11 under the guidance of the guiding plate 7. The V-shaped material supporting rack 12 conveys the half shaft workpiece to the high-frequency heating machine 3 to heat the thread at the end of the half shaft. The heated half shaft workpiece is conveyed to the spraying device, and quenching treatment is carried out through the spraying of the first spray head 15 on the heated part of the half shaft. The quenched half shaft is conveyed by the conveying device to directly below the coding device, and the laser coding machine 18 engraves marks on the surface of the half shaft. The half shaft continues to be conveyed to the rust prevention treatment device. By controlling the two electromagnetic valves 27, the air pump 23 and the oil pump 26, anti-rust oil is sprayed on the surface of the half shaft, or the water marks are air-dried, or both air-drying the water marks and spraying anti-rust oil are carried out according to the processing requirements. The processed half shaft workpieces are conveyed to the end of the chain conveyor 11 and fall onto the material receiving plate 34, and then roll onto the material receiving rack 33 for collection.

[0045] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit and basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0046] In summary, the present invention provides a half shaft high-frequency quenching production line, which can realize full-automatic half shaft heat treatment processing, save labor costs, improve the processing quality of half shafts, and is easy to control and analyze, ensuring the unity or stability of half shaft quality and being suitable for large-scale processing and use.

[0047] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A half shaft high-frequency quenching production line, characterized in that, It includes a feeding device for placing the workpiece to be processed, a processing device arranged on one side of the feeding device for quenching processing, a receiving device arranged on one side of the processing device for receiving the finished product, and a PLC control system capable of controlling the operation of the feeding device and the processing device; The feeding device includes a material rack (1), a loading mechanism arranged on the material rack (1), and a material distributing mechanism for transferring the workpiece to the processing device. The placing surface of the material rack (1) is inclined, and the horizontal height of the end close to the loading mechanism is lower than the horizontal height of the end far from the loading mechanism; The material distributing mechanism includes a material distributing rack (6) connected to the material rack (1). On the side of the material distributing rack (6) far from the material rack (1), there is a guiding plate (7) for guiding the workpiece into the processing device and a lifting mechanism capable of transferring the workpiece on the material distributing rack (6) to the guiding plate (7). The end of the workpiece placing surface on the material distributing rack (6) close to the material rack (1) is higher than the end where the lifting mechanism is located. The lifting mechanism includes a blocking plate (8) connected to the material distributing rack (6), an L-shaped lifting plate (9) capable of longitudinally sliding on the blocking plate (8), and a second oil cylinder (10) arranged on the blocking plate (8) for controlling the movement of the L-shaped lifting plate (9). The telescopic end of the second oil cylinder (10) is fixedly connected to the L-shaped lifting plate (9). The length of one side of the L-shaped lifting plate (9) extending towards the material distributing rack (6) on the blocking plate (8) is greater than the diameter distance of a half shaft; The processing device includes a machine frame (2). At the upper end of the machine frame (2), there are successively arranged a high-frequency heating machine (3) for heating the end of the workpiece, a spraying device for cooling the heated workpiece, a coding device for marking the workpiece, and an anti-rust treatment device capable of performing anti-rust treatment on the surface of the half shaft. A conveying device for conveying the workpiece for flow processing is also arranged on the machine frame (2); An axial positioning mechanism for aligning the workpieces is arranged between the feeding device and the processing device; Among them, the axial positioning mechanism includes a third gantry (28) fixedly connected to the upper end of the machine frame (2). Two clamping plates (29) are slidably arranged on the cross bar of the third gantry (28). Tooth plates (30) are arranged on both of the two clamping plates (29). The two tooth plates (30) are arranged in parallel. A driving mechanism capable of driving the two clamping plates (29) to move synchronously and reversely on the cross bar is arranged at the center of the cross bar of the third gantry (28).

2. The high-frequency quenching production line for a half shaft according to claim 1, wherein: The loading mechanism includes a supporting plate (4) capable of longitudinally sliding on the side of the material rack (1) close to the processing device and a first oil cylinder (5) capable of driving the supporting plate (4) to longitudinally lift. The telescopic end of the first oil cylinder (5) is fixedly connected to the lower end of the supporting plate (4).

3. The high-frequency quenching production line for a half shaft according to claim 1, characterized in that: The conveying device includes a chain conveyor (11) and a number of V-shaped supporting racks (12) evenly arranged on the chain conveyor (11).

4. A high-frequency quenching production line for a half shaft according to claim 3, characterized in that: The spray device includes a reservoir (13) arranged directly below the conveying device, and a housing (14) connected to the reservoir (13) and covering the conveying device. First nozzles (15) are arranged on both the upper and lower sides of the conveying device inside the housing (14). A circulation pump (16) is arranged in the reservoir (13) and is connected to all the first nozzles (15) through water pipes.

5. A half shaft high-frequency quenching production line according to claim 1, characterized in that: The coding device includes a first gantry (17) connected to the upper end of the frame (2). The first gantry (17) covers the conveying device, and a laser coder (18) is arranged on the cross arm of the first gantry (17).

6. The semi-axle high-frequency quenching production line according to claim 1, wherein: The rust prevention treatment device includes a U-shaped structure housing (19) fixedly connected to the upper end of the frame (2). A material blocking frame (20) with the same size as the first gantry (17) is arranged at one end of the housing (19) close to the coding device. The size of the housing (19) is larger than that of the material blocking frame (20). Second nozzles (21) and third nozzles (25) are arranged on both the two vertical rods and the cross bar of the housing (19). An air pump (23) and an oil tank (24) are arranged on the frame (2). The air pump (23) is connected to the second nozzles (21) through a pipeline. An oil pump (26) is arranged in the oil tank (24). The oil pump (26) is connected to the third nozzles (25) through a pipeline. Solenoid valves (27) are arranged at one ends of the second nozzles (21) and the third nozzles (25) that are communicated with the pipelines.

7. A high-frequency quenching production line for half shafts according to claim 1, characterized in that: The driving mechanism includes a driving motor (31) and a gear (32) arranged at the output end of the driving motor (31). The gear (32) is meshed and connected with two toothed plates (30).

8. An axle half high-frequency quenching production line according to claim 1, characterized in that: The material receiving device includes a material receiving frame (33). A receiving plate (34) is arranged obliquely on the material receiving frame (33). The horizontal height of the receiving plate (34) at the end close to the processing device is higher than that at the other end. Material blocking plates (35) are arranged on both sides of the receiving plate (34).

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