Method and system for surface cleaning of automotive half shafts

Abstract

The application discloses a surface cleaning method and system of automobile half shafts, and belongs to the technical field of half shaft machining. The method comprises the following steps: firstly, vertically suspending the half shafts on the lower end ring only on odd or even suspension positions; secondly, vertically suspending the half shafts on the middle ring only on odd or even suspension positions and staggered with the half shafts suspended on the lower end ring; thirdly, vertically suspending the half shafts on the upper end ring only on odd or even suspension positions and staggered with the half shafts suspended on the middle ring; finally, placing the horizontal half shafts and horizontally inserting the half shafts on the support surface formed by the half shafts suspended on the middle ring; the suspension crane sends the suspension lifting appliance into the shot blasting chamber, the door is closed, the top sealing structure seals the lifting hook seam, the shot blasting machine is opened, the half shafts are subjected to shot blasting treatment, the door is opened, the suspension crane sends the suspension lifting appliance out of the shot blasting chamber, and the half shafts are taken off from the suspension lifting appliance in the reverse order.

Description

Technical Field

[0001] This invention belongs to the field of axle machining technology, and specifically relates to a surface cleaning method and system for automotive axles. Background Technology

[0002] The axle of an automobile is the direct drive component for wheel rotation and a crucial part for transmitting torque. The current machining process for axles is as follows: 1. Cutting incoming raw materials; 2. Forging; 3. Straightening; 4. Sawing the overall length; 5. Rough turning; 6. Quenching and tempering; 7. Straightening; 8. Splitting the overall length; 9. Drilling the center hole; 10. Semi-finish turning; 11. Finish turning; 12. Gear milling; 13. Surface medium-frequency heat treatment; 14. Tempering; 15. Fine straightening; 16. Fine shot blasting; 17. Fine turning of the disc; 18. Drilling; 19. Threading; 20. Grinding the journal; 21. Magnetic particle inspection; 22. Final inspection.

[0003] During the machining process of the half shaft, a shot blasting machine is required to clean the surface of the half shaft. For example, patent application number CN201520415628.8 discloses a single shot blasting machine, including a shot blasting chamber, a bucket elevator, a shot blaster, a separator, a hook control mechanism, and a cartridge dust collector. The machine is characterized in that: a collecting funnel is connected to the lower end of the shot blasting chamber; the bottom rear end of the collecting funnel is connected to the lower part of the bucket elevator via a sand-flowing pipe; the bucket elevator is located on the rear side of the shot blasting chamber; the separator is located on the front side of the upper opening of the bucket elevator; the upper part of the bucket elevator is connected to the separator; a hopper is provided at the lower end of the separator; the bottom of the hopper is connected to the shot blaster located on the side wall of the shot blasting chamber via a conveying pipe; a mounting frame is provided above the shot blasting chamber; the hook control mechanism is located within the mounting frame; the lower end of the hook control mechanism is connected via a pull rod to a hook located inside the shot blasting chamber for hanging workpieces; the side wall of the elevator is connected to a cartridge dust collector on one side of the shot blasting chamber via a dust removal pipe.

[0004] In existing technology, the half-shafts are suspended on a suspended crane by a suspension hanger before being sent into the shot blasting chamber for shot blasting. Multiple half-shafts are usually suspended vertically on the suspension hanger in a ring shape, and only a dozen or so half-shafts can be processed at a time, resulting in low efficiency and low utilization of the shot blasting machine. Summary of the Invention

[0005] To address the aforementioned problems, embodiments of the present invention provide a surface cleaning system for automotive half-shafts, capable of processing a large number of half-shafts at once, achieving high utilization of the shot blasting machine, and eliminating the need for additional equipment. The technical solution is as follows:

[0006] On one hand, embodiments of the present invention provide a surface cleaning system for automotive half-shafts. This system includes a double-hook shot blasting machine and two suspended hangers 2. The double-hook shot blasting machine includes a shot blasting chamber 3, a door 4 at the front of the shot blasting chamber 3, a hook channel 5 at the top of the shot blasting chamber 3, a top sealing structure 11 at the top of the shot blasting chamber 3 that can close the hook channel 5, a shot blaster 6 on the side wall of the shot blasting chamber 3, a herringbone track 7 directly above the hook channel 5, two suspended cranes 8 on the herringbone track 7, and a vertically arranged upper hook 9 on the suspended cranes 8. The top of the suspended hangers 2... The upper part is equipped with a lower hook 21, which is suspended from the upper hook 9. There are two shot blasters 6, each located on the left or right side of the shot blasting chamber 3 and facing the suspension device 2 inside the chamber. One shot blaster 6 is located at the top of the shot blasting chamber 3 and is angled downwards from the outside to the inside, while the other shot blaster 6 is located at the bottom of the chamber and is angled upwards from the outside to the inside. A baffle 10 is located at the top of the shot blasting chamber 3, on the side of the hook seam 5 near the shot blaster 6. The baffle 10 is arranged in the front-to-back direction and is located adjacent to the upper hook 9. On the left or adjacent right side, the upper end of the upper hook 9 is rotatably connected to the suspended crane 8; the suspension device 2 includes a vertically arranged central beam 22, three rings 23 arranged side by side and coaxial with the central beam 22, multiple hanging rods 24 evenly distributed on the outer side of the rings 23, spokes 25 between the inner side of the rings 23 and the central beam 22, and reinforcing ribs 26 between the upper rings 23 and the central beam 22; the outer diameter of the three rings 23 decreases from top to bottom and they are located at the upper end, middle and lower end of the central beam 22 respectively; the hanging rods 24 are radially connected to the rings 23. The surface is arranged diagonally upwards from the inside to the outside with an inclination angle of 3-10°; the distance between two adjacent hanging rods 24 is 3-8cm larger than the diameter of the rod part of the half shaft 1; the lower hook 21 is fixed to the upper end of the central beam 22; the distance between two adjacent rings 23 is 1 / 4-1 / 3 of the length of the half shaft 1; the spokes 25 are arranged horizontally; the reinforcing rib 26 is arranged diagonally downwards from the outside to the inside, and its lower end is fixed on the central beam 22 and located adjacent to the surface of the middle ring 23; the outer diameter of the middle ring 23 is 0.7-1 cm of the length of the half shaft 1.0 times; two adjacent hanging rods 24 form a suspension position, and only an odd or even number of suspension positions on the same ring 23 are used to suspend half shafts 1; the half shafts 1 suspended on two adjacent rings 23 are staggered; the rod part of the half shaft 1 suspended on the previous ring 23 is located outside the disc part of the half shaft 1 suspended on the current ring 23; the rod parts of two adjacent half shafts 1 on the previous ring 23 are respectively located on both sides of the corresponding half shaft 1 on the current ring 23; multiple half shafts 1 are vertically suspended on all three rings 23; for the vertically suspended half shafts 1: the rod part of the half shaft 1 is located between two adjacent hanging rods 24, and its disc part is placed on the two adjacent hanging rods 24, which are arranged diagonally outward from top to bottom; the lower part of all vertically suspended half shafts 1 is radiating around the central beam 22. The half-shafts 1 are arranged in a scattered pattern, with their lower ends forming a downward-protruding arch. The discs of two adjacent half-shafts 1 on the same ring 23 are arranged adjacently. The discs of the half-shafts 1 suspended on the middle ring 23 form an annular support surface, on which multiple horizontal half-shafts 1 are placed. For the horizontal half-shafts 1: the half-shaft 1 is horizontally arranged, its disc is located adjacent to the outer side of the rod of the half-shaft 1 suspended on the upper ring 23, its rod is inserted into the space between the middle ring 23 and the upper ring 23, its rod is located between two adjacent half-shafts 1 suspended on the upper ring 23, its rod is curved upwards, and its rod rests against the lower side of the reinforcing rib 26 or spoke 25. The multiple horizontal half-shafts 1 are arranged in an arc shape and located on one side of the suspension device 2.

[0007] In this embodiment of the invention, the hook channel 5 is arranged in the front-to-back direction and is located at the middle of the top of the shot blasting chamber 3. The herringbone track 7 is arranged in the front-to-back direction and its two arc-shaped forked tracks are located in front of the shot blasting chamber 3. The two suspended cranes 8 are located on the left and right sides of the herringbone track 7 and can move along the two arc-shaped forked tracks respectively. The upper hook 9 consists of a pulley, a bushing, and a hook from top to bottom. The pulley is arranged horizontally and is wrapped around the lower end of the steel cable of the suspended crane 8. The bushing is arranged vertically. The hook is arranged vertically, with its upper end rotatably located inside the bushing and its lower end hooked on the lower hook 21. The nozzle of the shot blaster 6 is a strip-shaped nozzle.

[0008] Specifically, in this embodiment of the invention, the outer diameter of the upper ring 23 is 1.2-1.5 times the length of the half-shaft 1, and the outer diameter of the lower ring 23 is 0.4-0.7 times the length of the half-shaft 1.

[0009] Specifically, in this embodiment of the invention, the diameter of the rod is R, the radius of the disc is r, and the length of the hanging rod 24 is 0.7-1.2 times (r+R) and it is made of threaded steel.

[0010] Specifically, in this embodiment of the invention, each ring 23 is provided with three spokes 25; the three spokes 25 are evenly distributed around the central beam 22 and are arranged radially along the ring 23; the reinforcing ribs 26 are arranged along the radial surface of the upper end of the ring 23, and the number of them is three; the three reinforcing ribs 26 are evenly distributed around the central beam 22.

[0011] In this embodiment of the invention, soft sealing plates are provided on both the left and right sides of the hook channel 5, and a top sealing structure 11 is provided adjacent to and above the hook 9 on the left or rear side. The top sealing structure 11 is linked with the door 4 on the left or right side. The top sealing structure 11 includes a mounting seat on the upper part of the door 4, a sealing plate adjacent to and above the hook channel 5 and arranged in the front-rear direction, a push-pull rod hinged between the front part of the sealing plate and the mounting seat, a rocker arm hinged between the rear part of the sealing plate and the top of the shot blasting chamber 3, and a pressure plate on the top of the door 4 and located directly in front of the hook channel 5. The sealing plate is located on the left or rear side of the upper hook 9, and its rear end is provided with a notch that cooperates with the upper hook 9. The side of the sealing plate close to the upper hook 9 is curved upward. When the upper hook 9 moves to the rear end of the hook channel 5, the door 4 closes, and the sealing plate moves to the top of the hook channel 5. At this time, the notch abuts against the front side of the upper hook 9, and the pressure plate abuts against the front end of the sealing plate.

[0012] Preferably, in this embodiment of the invention, a pit is provided in front of the shot blasting chamber 3, and a support is provided in the pit and directly below the two arc-shaped bifurcated tracks.

[0013] On the other hand, embodiments of the present invention also provide a method for cleaning the surface of an automobile half-shaft, the method comprising:

[0014] S101 Suspension of Half-Shafts: First, suspend half-shafts 1 on the lower ring 23, vertically suspending half-shafts 1 only in odd or even suspension positions; then suspend half-shafts 1 on the middle ring 23, vertically suspending half-shafts 1 only in odd or even suspension positions and staggered from the half-shafts 1 suspended on the lower ring 23; then suspend half-shafts 1 on the upper ring 23, vertically suspending half-shafts 1 only in odd or even suspension positions and staggered from the half-shafts 1 suspended on the middle ring 23; finally, place horizontal half-shafts 1, horizontally inserting multiple half-shafts 1 on the support surface formed by the disc portion of the half-shafts 1 suspended on the middle ring 23.

[0015] S102 Shot blasting: The suspended crane 8 sends the suspended lifting device 2 into the shot blasting chamber 3, the door 4 is closed, and at the same time, the top sealing structure 11 seals the hook seam 5; the shot blaster 6 is opened to perform shot blasting on the half shaft 1.

[0016] S103 Removing the half shaft: After shot blasting is completed, the door 4 is opened, and the suspended crane 8 sends the suspended lifting device 2 out of the shot blasting chamber 3. The half shaft 1 is removed from the suspended lifting device 2 in the reverse order of step S101.

[0017] Furthermore, step S103 also includes: the suspended crane 8 first moves to directly above the placement bracket, the suspended crane 8 lowers so that the bottom of the suspended lifting device 2 is placed on the placement bracket, and the shot blasting on the suspended lifting device 2 and the half shaft 1 falls into the pit and is placed for a predetermined time; the suspended crane 8 rises and continues to move forward, and then the half shaft 1 is removed.

[0018] Preferably, while one suspended crane 8 is performing shot peening, the shot-peened half-shaft 1 is first removed from another suspended crane 8, and then the untreated half-shaft 1 is suspended.

[0019] The beneficial effects of the technical solution provided by the embodiments of the present invention are as follows:

[0020] (1) It can process at least thirty half-shafts at a time, which is highly efficient;

[0021] (2) The surface cleaning effect is good, the cleaning time of a single half shaft is short (the total time is less than 10 minutes and matches the total time of hanging half shaft and removing half shaft), and the surface of each half shaft is clean and shiny.

[0022] (3) A double-suspension crane structure is adopted, so that while shot peening is being performed on one suspended crane, the half shaft after shot peening is first removed on the other suspended crane, and then the untreated half shaft is suspended. The time of the two suspended cranes is basically matched, and only one operator is needed, which improves efficiency.

[0023] (4) The horizontally placed half shaft makes the whole structure asymmetrical and can rotate during shot blasting. There is no need to set up a hook control mechanism. The suspension can rotate by itself, which simplifies the structure of the shot blasting machine (can improve service life), reduces energy consumption, and reduces the time for the hook control mechanism to connect with the driven gear.

[0024] (5) Multiple half-shafts are suspended on each ring, and half-shafts are placed on the middle ring. This makes high use of the internal space of the shot blasting chamber. The overall size of the suspension device and the half-shafts on it is larger than the design size, but it can still be used well.

[0025] (6) Shot blasting is not easy to escape from the top of the shot blasting chamber. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the double-hook shot blasting machine provided in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of the suspension device provided in an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the central circular ring structure;

[0029] Figure 4 yes Figure 3 Diagram showing the usage status when the half-shaft is suspended;

[0030] Figure 5 This is a schematic diagram of the top sealing structure;

[0031] Figure 6 This is a schematic diagram of the appearance of the half-shaft before processing;

[0032] Figure 7 This is a schematic diagram of the appearance after the half-shaft has been processed.

[0033] In the diagram: 1 Half shaft, 2 Suspension hoist, 3 Shot blasting chamber, 4 Door, 5 Hook seam, 6 Shot blaster, 7 Herringbone track, 8 Suspended crane, 9 Upper hook, 10 Baffle, 11 Top sealing structure;

[0034] 21 Lower hook, 22 Center beam, 23 Ring, 24 Hanging rod, 25 Spokes, 26 Reinforcing rib. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0036] Example 1

[0037] See Figure 1-7 Example 1 provides a surface cleaning system for automobile half-shafts, including a double-hook shot blasting machine and two suspended hangers 2. The double-hook shot blasting machine includes a shot blasting chamber 3, a collection structure at the bottom of the shot blasting chamber 3, a circulation structure at the rear of the shot blasting chamber 3, a door 4 at the front of the shot blasting chamber 3, a hook channel 5 at the top of the shot blasting chamber 3, a top sealing structure 11 at the top of the shot blasting chamber 3 that can close the hook channel 5, shot blasters 6 on the side wall of the shot blasting chamber 3, a herringbone track 7 directly above the hook channel 5, two suspended cranes 8 on the herringbone track 7, and vertically arranged upper hooks 9 on the suspended cranes 8. The hook channel 5 is arranged in the front-rear direction and is located in the middle of the top of the shot blasting chamber 3. The herringbone track 7 is arranged in the front-rear direction, with two arc-shaped forked tracks at the front of the shot blasting chamber 3, and a straight track at the rear, located directly above the hook channel 5. Two suspended cranes 8 are located on the left and right sides of the herringbone track 7, respectively, and can move along the two arc-shaped forked tracks.

[0038] The shot blasting chamber 6 comprises two shot blasters 6, each with a strip-shaped nozzle (vertically inclined). Both shot blasters 6 are located on the left or right side of the shot blasting chamber 3, facing the suspension device 2 within the chamber. One shot blaster 6 is located at the top of the chamber 3, angled downwards from the outside to the inside (inclination angle 45-60°), while the other shot blaster 6 is located at the bottom of the chamber 3, angled upwards from the outside to the inside (inclination angle 45-60°). The shot blasting chamber 3 is rectangular, open at the front but closed by a door 4. A baffle 10 is located at the top of the chamber, near the side of the hook passage 5 closest to the shot blasters 6 (to reduce the possibility of shot entering the hook passage 5). The baffle 10 is positioned along the front-to-back direction, adjacent to the left or right side of the upper hook 9.

[0039] The hook seam 5 has soft sealing plates (specifically strip-shaped rubber plates that slope downwards from the outside to the inside, with the two sealing plates located on the left and right sides of the upper hook 9, respectively). A top sealing structure 11 is located adjacent to and above the top hook 9, to the left or rear of the upper hook 9. The top sealing structure 11 is linked to the left or right door 4, as described in application CN201520412857.4. The top sealing structure 11 includes a mounting base on the upper part of the door 4, a sealing plate (specifically a rectangular plate) adjacent to and above the hook seam 5 and arranged in the front-to-back direction, a push-pull rod hinged between the front of the sealing plate and the mounting base, a rocker arm hinged between the rear of the sealing plate and the top of the shot blasting chamber 3, and a pressure plate (vertically arranged) on the top of the door 4 and directly in front of the hook seam 5. The push-pull rod, rocker arm, sealing plate, and shot blasting chamber 3 form a four-bar linkage. The sealing plate is located on the left or rear side of the upper hook 9, and its rear end has a notch (specifically a semi-circular notch) that mates with the upper hook 9. The side of the sealing plate closest to the upper hook 9 is curved upwards. When the upper hook 9 moves to the rear end of the hook channel 5, the door 4 closes, and the sealing plate moves to directly above the hook channel 5. At this time, the notch rests against the front side of the upper hook 9, and the pressure plate rests against the front end of the sealing plate.

[0040] The upper end of the upper hook 9 is rotatably connected to the suspended crane 8; the top of the suspended lifting device 2 is provided with a lower hook 21, which is suspended from the upper hook 9. Specifically, the upper hook 9 consists of a pulley, a bushing, and a hook from top to bottom. The pulley is horizontally positioned and wrapped around the lower end of the steel cable (ring) of the suspended crane 8. The bushing is vertically positioned. The hook is vertically positioned, with its upper end rotatably positioned inside the bushing and its lower end hooked onto the lower hook 21, allowing it to move back and forth within the hook groove 5.

[0041] The suspension device 2 includes a vertically arranged central beam 22, three parallel rings 23 coaxial with the central beam 22, multiple evenly distributed hanging rods 24 on the outer side of the rings 23, spokes 25 between the inner side of the rings 23 and the central beam 22, and reinforcing ribs 26 between the upper ring 23 and the central beam 22. The outer diameters of the three rings 23 decrease from top to bottom and are located at the upper, middle, and lower ends of the central beam 22, respectively. The hanging rods 24 are arranged along the radial surface of the rings 23, inclined upwards from the inside to the outside at an angle of 3-10°, and their length is 0.7-1.2 times (r+R). They are made of threaded steel to prevent the half-shaft 1 from slipping. The diameter of the rod part of the half-shaft 1 is R, and the radius of the disc part of the half-shaft 1 is r. The distance between two adjacent hanging rods 24 is 3-8 cm larger than the diameter of the rod part of the half-shaft 1. The lower hook 21 is fixed to the upper end of the central beam 22. The distance between two adjacent rings 23 is 1 / 4 to 1 / 3 of the length of the semi-shaft 1. Spokes 25 are horizontally arranged radially along the rings 23 and are evenly distributed around the central beam 22. Reinforcing ribs 26 are arranged obliquely downwards from the outside to the inside, along the radial surface of the upper ring 23, and are evenly distributed around the central beam 22. Their lower ends are fixed to the central beam 22 and located adjacent to the surface of the middle ring 23, while their upper ends are fixed to the bottom of the upper ring 23. The outer diameter of the upper ring 23 is 1.2 to 1.5 times the length of the semi-shaft 1, the outer diameter of the middle ring 23 is 0.7 to 1.0 times the length of the semi-shaft 1, and the outer diameter of the lower ring 23 is 0.4 to 0.7 times the length of the semi-shaft 1.

[0042] In this configuration, two adjacent hanging rods 24 form a suspension position (forming a trapezoidal structure), and only an odd or even number of suspension positions on the same ring 23 suspend half-shafts 1. The half-shafts 1 suspended on two adjacent rings 23 are staggered (slightly offset); the rod portion of the half-shaft 1 suspended on the previous ring 23 (such as the upper ring 23) is located outside the disc portion of the half-shaft 1 suspended on the current ring 23 (such as the middle ring 23). The rod portions of two adjacent half-shafts 1 on the previous ring 23 (such as the upper ring 23) are respectively located on both sides of the corresponding half-shaft 1 on the current ring 23 (such as the middle ring 23).

[0043] Each of the three rings 23 has multiple half-shafts 1 suspended vertically. For each vertically suspended half-shaft 1, the rod portion of the half-shaft 1 is located between two adjacent hanging rods 24, and its disc portion is placed on two adjacent hanging rods 24, arranged diagonally outward from top to bottom. The lower parts of all vertically suspended half-shafts 1 are radiating around the central beam 22, and their lower ends form a downward-protruding arch. The disc portions of two adjacent half-shafts 1 on the same ring 23 are arranged adjacent to each other.

[0044] The disc portion of the half-shaft 1 suspended on the central ring 23 forms an annular support surface, on which multiple horizontal half-shafts 1 are placed (approximately 1 / 4 to 1 / 2 the number of half-shafts 1 suspended on the upper ring 23). For the horizontal half-shafts 1: the half-shaft 1 is horizontally positioned, its disc portion located adjacent to the outer side of the rod portion of the half-shaft 1 suspended on the upper ring 23, its rod portion inserted into the space between the central and upper rings 23, its rod portion located between two adjacent half-shafts 1 suspended on the upper ring 23, its rod portion curving upwards, and its rod portion abutting against the lower side of the reinforcing rib 26 or spoke 25. The multiple horizontal half-shafts 1 are arranged in an arc shape and located on one side of the suspension device 2, forming an asymmetrical structure. The rod portion of the later-inserted half-shaft 1 is located above the rod portion of the earlier-inserted half-shaft 1.

[0045] Example 2

[0046] Example 2 provides a surface cleaning system for automotive half-shafts. The structure of this system is basically the same as that of Example 1, except that: in this example, a pit (specifically a rectangular pit arranged in the left-right direction, located directly below the herringbone track 7) is provided in front of the shot blasting chamber 3. Placement brackets (specifically rectangular frames arranged in the left-right direction) are provided in the pit and directly below the two arc-shaped forked tracks. Because the suspension hanger 2 in this patent suspends a large number of half-shafts 1, and has a complex structure, shot blasting residue is easily left behind. Therefore, it needs to be placed for a short time to allow the residual shot blasting residue to fall off.

[0047] Example 3

[0048] Example 3 provides a surface cleaning system for automotive half-shafts. The structure of this system is basically the same as that of Example 1, except that each ring 23 in this example has three spokes 25 and three reinforcing ribs 26. The half-shaft is 1100mm long, with the outer diameter of the upper ring 23 being 1.4m, the middle ring 23 being 1.0m, and the lower ring 23 being 0.7m. The distance between two adjacent rings 23 is 0.3m. The upper ring 23 suspends 15 half-shafts 1, the middle ring 23 suspends 12 half-shafts 1, and the lower ring 23 suspends 8 half-shafts 1. Five half-shafts 1 are horizontally inserted, for a total processing capacity of 40 half-shafts 1. The shot blasting chamber 3 is designed to process workpieces with dimensions of 1200mm*1600mm (in actual use, for irregularly shaped workpieces, this dimension may be exceeded). The overall dimensions of the suspension hanger 2 and its upper half-shaft 1 in this patent are larger than the designed dimensions, but it still operates well.

[0049] Example 4

[0050] Example 4 provides a surface cleaning method for automobile half-shafts, using the automobile half-shaft surface cleaning system provided in Examples 1-3. The method includes:

[0051] S101 Suspension of Half-Shaft: The process of suspending half-shaft 1 on suspension hanger 2 is as follows: First, suspend half-shaft 1 on the lower ring 23, suspending half-shaft 1 vertically only on odd or even number of suspension positions; then suspend half-shaft 1 on the middle ring 23, suspending half-shaft 1 vertically only on odd or even number of suspension positions and staggered from the half-shaft 1 suspended on the lower ring 23; then suspend half-shaft 1 on the upper ring 23, suspending half-shaft 1 vertically only on odd or even number of suspension positions and staggered from the half-shaft 1 suspended on the middle ring 23; finally, place the horizontal half-shaft 1, and horizontally insert multiple half-shaft 1s on the support surface formed by the disc of the half-shaft 1 suspended on the middle ring 23.

[0052] S102 Shot blasting: The suspended crane 8 sends the suspended lifting device 2 into the shot blasting chamber 3, the door 4 is closed, and at the same time, the top sealing structure 11 seals the hook seam 5; the shot blaster 6 is opened to perform shot blasting on the half shaft 1.

[0053] S103 Removing the Half-Shaft: After shot blasting, door 4 opens, and the suspended crane 8 sends the suspended lifting device 2 out of the shot blasting chamber 3. The suspended crane 8 first moves to directly above the placement bracket, then lowers so that the bottom of the suspended lifting device 2 is placed on the placement bracket, allowing the shot blasted material on the suspended lifting device 2 and half-shaft 1 to fall into the pit. After a predetermined time (specifically 10-30 seconds), the suspended crane 8 rises and continues to move forward, finally removing the half-shaft 1 from the suspended lifting device 2 in the reverse order of step S101 (first removing the horizontal half-shaft 1, then the upper half-shaft 1, the middle half-shaft 1, and the lower half-shaft 1 in sequence). Simultaneously, while one suspended crane 8 is performing shot blasting, the other suspended crane 8 first removes the shot-blasted half-shaft 1, then suspends the untreated half-shaft 1.

[0054] Example 5

[0055] Example 5 provides a surface cleaning method for an automotive half-shaft. The processing method is the same as in Example 4. The parameters of the half-shaft processed in this example are: the length of the half-shaft is 1100mm, the diameter of the shaft is 40mm, and the material is 40Cr steel. Before processing, the half-shaft is as follows: Figure 6 As shown, the surface is black, and the treated half-shaft is as follows. Figure 7 As shown, all half-shafts were thoroughly cleaned, and their surfaces were clean and glossy (meeting design cleaning requirements). The upper ring 23 suspended 15 half-shafts 1, the middle ring 23 suspended 12 half-shafts 1, the lower ring 23 suspended 8 half-shafts 1, and 5 half-shafts 1 were horizontally inserted, for a total of 40 half-shafts 1 processed. The processing time was 8 minutes and 1 second, effectively cleaning the oil stains from the surface of the half-shafts 1, leaving all half-shafts 1 clean and glossy. The processing time for each half-shaft 1 was 12 seconds. The total time for suspending and removing the half-shafts 1 was 6 minutes and 50 seconds. The suspension fixtures and the half-shafts on them occupied most of the space in the shot blasting chamber, resulting in high space utilization.

[0056] Comparative Example 1: Only 15 half-shafts 1 are suspended on the upper ring 23. It takes approximately 5 minutes and 20 seconds to clean the half-shafts 1. The processing time for each half-shaft 1 is 21.3 seconds. The time for suspending and removing the half-shafts 1 is only 2 minutes and 18 seconds. The suspension device and the half-shafts on it occupy only the upper part of the shot blasting chamber.

[0057] In Comparative Example 2, only 15 half-shafts 1 are suspended from the upper ring 23, and a hook control mechanism is set to drive the upper hook (with a corresponding driven gear) to rotate. It takes about 4 minutes and 3 seconds to clean the half-shafts 1. The processing time for each half-shaft 1 is 16.2 seconds.

[0058] Comparative Example 3 uses the same suspension method as Example 5, but with a hook control mechanism driving the upper hook (on which a driven gear is correspondingly mounted) to rotate. It takes approximately 7 minutes and 43 seconds to clean half-shaft 1. The processing time for each half-shaft 1 is 11.58 seconds. This is not significantly different from Example 5. However, when using the hook control mechanism, it is necessary to control the driven gear to engage with the hook control mechanism, which takes at least 0.3 seconds.

[0059] Comparative Example 4, with the same suspension method as Example 5, but without horizontal half-shafts 1, has 35 half-shafts 1. The total time required is 10 minutes and 7 seconds, with each half-shaft 1 taking 17.3 seconds to process.

[0060] Comparative Example 5 uses the same suspension method as Example 5. The upper ring 23 suspends 13 half-shafts 1, the middle ring 23 suspends 10 half-shafts 1, and the lower ring 23 suspends 7 half-shafts 1. Five half-shafts 1 are horizontally inserted, resulting in a total of 35 half-shafts 1. The total processing time is 7 minutes and 10 seconds, with each half-shaft 1 requiring 12.3 seconds to process.

[0061] The processing time for a single half-shaft 1 in this embodiment is reduced by 43.7% compared to Comparative Example 1. Due to the more complex suspension method, the suspension time in this patent is longer, but slightly shorter than the shot blasting time, which is coordinated with the time for suspension and removal of half-shaft 1. Multiple batches of shot blasting can be connected, resulting in higher personnel utilization efficiency. The processing time for a single half-shaft 1 in this embodiment is reduced by 25.9% compared to Comparative Example 2. The processing time for a single half-shaft 1 in this embodiment is reduced by 30.6% compared to Comparative Example 4. The applicant speculates that the extended time is due to the lack of a horizontal half-shaft 1, which results in poor rotation of the suspension device. The processing time for a single half-shaft in Comparative Document 5 is similar to that in Example 5, although Example 5 has a larger total number of half-shafts and a slightly shorter processing time for a single half-shaft.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A surface cleaning system for automobile half-shafts, comprising a double-hook shot blasting machine and two suspended hangers (2), wherein the double-hook shot blasting machine comprises a shot blasting chamber (3), a door (4) on the front side of the shot blasting chamber (3), a hook channel (5) on the top of the shot blasting chamber (3), a top sealing structure (11) on the top of the shot blasting chamber (3) and capable of sealing the hook channel (5), a shot blaster (6) on the side wall of the shot blasting chamber (3), a herringbone track (7) directly above the hook channel (5), two suspended cranes (8) on the herringbone track (7) and an upper hook (9) vertically arranged on the suspended cranes (8); the top of the suspended hanger (2) is provided with a lower hook (21), the lower hook (21) being suspended on the upper hook (9); characterized in that, There are two shot blasters (6). Both shot blasters (6) are located on the left or right side of the shot blasting chamber (3) and face the suspension device (2) inside the shot blasting chamber (3). One shot blaster (6) is located at the top of the shot blasting chamber (3) and is set diagonally downward from the outside to the inside. The other shot blaster (6) is located at the bottom of the shot blasting chamber (3) and is set diagonally upward from the outside to the inside. A baffle (10) is provided at the top of the shot blasting chamber (3) and on the side of the hook seam (5) near the shot blaster (6). The baffle (10) is set along the front and back direction and is located on the adjacent left or adjacent right side of the upper hook (9). The upper end of the upper hook (9) is rotatably connected to the suspended crane (8). The suspension device (2) includes a vertically arranged central beam (22), three rings (23) arranged side by side and coaxial with the central beam (22), multiple hanging rods (24) evenly distributed on the outer side of the rings (23), spokes (25) between the inner side of the rings (23) and the central beam (22), and reinforcing ribs (26) between the upper rings (23) and the central beam (22); the outer diameter of the three rings (23) decreases from top to bottom and they are located at the upper end, middle and lower end of the central beam (22) respectively; The hanging rod (24) is arranged along the radial surface of the ring (23), and it is inclined upward from the inside to the outside with an inclination angle of 3-10°; the distance between two adjacent hanging rods (24) is 3-8cm larger than the diameter of the rod part of the half shaft (1); the lower hook (21) is fixed to the upper end of the central beam (22); the distance between two adjacent rings (23) is 1 / 4-1 / 3 of the length of the half shaft (1); the spokes (25) are arranged horizontally; the reinforcing rib (26) is inclined downward from the outside to the inside, and its lower end is fixed on the central beam (22) and located above the middle ring (23); The outer diameter of the central ring (23) is 0.7-1.0 times the length of the half-shaft (1); two adjacent hanging rods (24) form a suspension position, and half-shafts (1) are suspended on only an odd or even number of suspension positions on the same ring (23); the half-shafts (1) suspended on two adjacent rings (23) are staggered; the rod part of the half-shaft (1) suspended on the previous ring (23) is located outside the disc part of the half-shaft (1) suspended on the current ring (23); the rod parts of two adjacent half-shafts (1) on the previous ring (23) are respectively located on both sides of the corresponding half-shaft (1) on the current ring (23); Each of the three rings (23) has multiple half-shafts (1) suspended vertically. For the vertically suspended half-shafts (1): the rod part of the half-shaft (1) is located between two adjacent hanging rods (24), and its disc part is placed on two adjacent hanging rods (24), which are arranged obliquely outward from top to bottom. The lower part of all the vertically suspended half-shafts (1) is radiating around the central beam (22) and its lower end forms a downward convex arch. The disc parts of two adjacent half-shafts (1) on the same ring (23) are arranged adjacent to each other. The disc of the half-shaft (1) suspended on the middle ring (23) forms an annular support surface, on which multiple horizontal half-shafts (1) are placed; for the horizontal half-shaft (1): the half-shaft (1) is set horizontally, its disc is located on the adjacent outer side of the rod of the half-shaft (1) suspended on the upper ring (23), its rod is inserted into the space between the middle ring (23) and the upper ring (23), its rod is located between two adjacent half-shafts (1) suspended on the upper ring (23), its rod is tilted upward, and its rod rests against the underside of the reinforcing rib (26) or spoke (25); the multiple horizontal half-shafts (1) are distributed in an arc shape and located on one side of the suspension device (2).

2. The surface cleaning system for automobile half-shafts according to claim 1, characterized in that, The hook seam (5) is arranged in the front-to-back direction and is located in the middle of the top of the shot blasting chamber (3). The herringbone track (7) is arranged in the front-to-back direction and its two arc-shaped forked tracks are located in front of the shot blasting chamber (3). Two suspended cranes (8) are located on the left and right sides of the herringbone track (7) and can move along the two arc-shaped forked tracks respectively. The upper hook (9) consists of a pulley, a bushing and a hook from top to bottom. The pulley is arranged horizontally and is wrapped around the lower end of the steel cable of the suspended crane (8). The bushing is arranged vertically. The hook is arranged vertically, with its upper end rotatably located inside the bushing and its lower end hooked on the lower hook (21). The nozzle of the shot blaster (6) is a strip-shaped nozzle.

3. The surface cleaning system for automobile half-shafts according to claim 2, characterized in that, The outer diameter of the upper ring (23) is 1.2-1.5 times the length of the half shaft (1), and the outer diameter of the lower ring (23) is 0.4-0.7 times the length of the half shaft (1).

4. The surface cleaning system for automobile half-shafts according to claim 2, characterized in that, The diameter of the rod is R, the radius of the disc is r, and the length of the hanging rod (24) is 0.7-1.2 times (r+R) and it is made of threaded steel.

5. The surface cleaning system for automobile half-shafts according to claim 2, characterized in that, Each ring (23) is provided with three spokes (25); the three spokes (25) are evenly distributed around the central beam (22) and are arranged radially along the ring (23); the reinforcing ribs (26) are arranged along the radial surface of the upper ring (23), and there are three of them; the three reinforcing ribs (26) are evenly distributed around the central beam (22).

6. The surface cleaning system for automobile half-shafts according to claim 1, characterized in that, The left and right sides of the hook channel (5) are provided with soft sealing plates, and the top sealing structure (11) is provided adjacent to the upper hook (9) and located on the left or rear side; the top sealing structure (11) is linked with the door (4) on the left or right side; the top sealing structure (11) includes a mounting seat on the upper part of the door (4), a sealing plate arranged adjacent to the hook channel (5) and along the front and rear direction, a push-pull rod hinged between the front part of the sealing plate and the mounting seat, a rocker arm hinged between the rear part of the sealing plate and the top of the shot blasting chamber (3), and a pressure plate on the top of the door (4) and located directly in front of the hook channel (5); the sealing plate is located on the left or rear side of the upper hook (9), and its rear end is provided with a notch that cooperates with the upper hook (9), and its side close to the upper hook (9) is bent upward in an arc shape; The upper hook (9) moves to the rear end of the hook channel (5), the door (4) closes, and the sealing plate moves to the top of the hook channel (5). At this time, the notch abuts against the front side of the upper hook (9), and the pressure plate abuts against the front end of the sealing plate.

7. The surface cleaning system for automobile half-shafts according to claim 1, characterized in that, A pit is provided in front of the shot blasting chamber (3), and a support is provided in the pit and directly below the two arc-shaped bifurcated tracks.

8. A method for cleaning the surface of an automobile half-shaft, characterized in that, The method includes: S101 Suspension of half shafts: First, suspend half shafts (1) on the lower ring (23), and suspend half shafts (1) vertically only on odd or even suspension positions; then suspend half shafts (1) on the middle ring (23), and suspend half shafts (1) vertically only on odd or even suspension positions and staggered from the half shafts (1) suspended on the lower ring (23); then suspend half shafts (1) on the upper ring (23), and suspend half shafts (1) vertically only on odd or even suspension positions and staggered from the half shafts (1) suspended on the middle ring (23); finally, place horizontal half shafts (1), and horizontally insert multiple half shafts (1) on the support surface formed by the disc of the half shafts (1) suspended on the middle ring (23); S102 Shot blasting: The suspended crane (8) sends the suspended lifting device (2) into the shot blasting chamber (3), the door (4) is closed, and at the same time, the top sealing structure (11) seals the hook seam (5); the shot blaster (6) is opened to perform shot blasting on the half shaft (1); S103 Remove the half shaft: After shot blasting is completed, the door (4) is opened, and the suspended crane (8) sends the suspended lifting device (2) out of the shot blasting chamber (3) and removes the half shaft (1) from the suspended lifting device (2) in the reverse order of step S101.

9. The method according to claim 8, characterized in that, Step S103 further includes: the suspended crane (8) first moves to the top of the placement bracket, the suspended crane (8) lowers so that the bottom of the suspended lifting device (2) is placed on the placement bracket, and the shot blasting on the suspended lifting device (2) and the half shaft (1) falls into the pit and is placed for a predetermined time; the suspended crane (8) rises and continues to move forward, and then the half shaft (1) is removed.

10. The method according to claim 8, characterized in that, While shot peening is being performed on one suspended crane (8), the shot-peened half shaft (1) is first removed from another suspended crane (8), and then the untreated half shaft (1) is suspended.

Images