Laser-shot peening strengthening device and method for spiral bevel gear

Abstract

The invention relates to the technical field of laser-shot peening strengthening, and discloses a laser-shot peening strengthening device and method for a spiral bevel gear. A base is characterized in that a sleeving clamping assembly is arranged in a groove in the upper end of the base, and the top of the sleeving clamping assembly is used for sleeving the spiral bevel gear; piston rods at the output ends of the electric cylinders penetrate through the support and then are connected with top pressing cooling assemblies. A laser assembly is installed on the right side of the upper end of the base through a mechanical arm, and pulse laser beams emitted by the laser assembly are used for conducting laser shot peening treatment on the spiral bevel gear. The spiral bevel gear can be clamped and fixed from the upper end and the inner wall of the spiral bevel gear at the same time, and therefore it can be ensured that the spiral bevel gear is firmly fixed. The surface of the spiral bevel gear is cooled, so that the damage caused by the fact that the emitted high-energy pulse laser beams instantly generate high temperature and high pressure exceeding the expectation on the surface of the spiral bevel gear due to the fact that the power of the laser assembly is too large can be prevented.

Description

Technical Field

[0001] The invention relates to the technical field of laser-shot peening strengthening, and in particular to a laser-shot peening strengthening device and method for spiral bevel gears. Background Art

[0002] Laser shot peening utilizes the shock wave generated by the interaction between the laser beam and the material surface. When the laser beam is focused on the absorption layer on the surface of the material, the absorption layer absorbs the laser energy and evaporates rapidly to form plasma. The plasma explodes on the surface of the material, generating pulse pressure, and then generating shock waves that propagate into the material. This shock wave generates residual compressive stress inside the material, thereby improving the durability and safety of the material. During the laser shot peening process of spiral bevel gears, the spiral bevel gears need to be fixed before rotating, so that the laser unit can perform laser shot peening on different positions of the spiral bevel gears in turn. However, the clamping and fixing operations of the spiral bevel gears are cumbersome, and the fixing effect is not good. When the power of the laser unit is too large, the emitted high-energy pulsed laser beam instantly generates higher-temperature and higher-pressure than expected on the surface of the spiral bevel gear, which will damage the surface of the spiral bevel gear. For this reason, we have introduced a laser-shot peening device and method for spiral bevel gears. Summary of the invention

[0003] The object of the present invention is to provide a laser-shot peening device and method for spiral bevel gears to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A laser-shot peening strengthening device for spiral bevel gears, comprising a base, a sleeve clamping assembly is arranged in a groove at the upper end of the base, and the top of the sleeve clamping assembly is used for sleeve-engaging the spiral bevel gear;

[0006] An electric cylinder is fixed to the rear of the upper end of the base through a bracket, and a piston rod at the output end of the electric cylinder passes through the bracket and is connected to a top compression cooling assembly;

[0007] A laser assembly is installed on the right side of the upper end of the base by a mechanical arm, and the pulsed laser beam emitted by the laser assembly is used to perform laser shot peening on the spiral bevel gear;

[0008] While the top pressing and cooling assembly is pressed down and fixed on the upper end of the spiral bevel gear, the top pressing and cooling assembly is clamped with the sleeve clamping assembly, and the clamping mechanism with equal spacing inside the drive sleeve clamping assembly is tensioned and fixed inside the spiral bevel gear;

[0009] The sleeve clamping assembly is driven by the motor to drive the spiral bevel gear and the top pressing and cooling assembly to rotate synchronously, and the top pressing and cooling assembly is also provided with a cooling pipe system for cooling the surface of the spiral bevel gear.

[0010] Preferably, the motor is fixed to the middle of the lower end of the base;

[0011] The sleeve clamping assembly comprises a bottom limiting plate arranged in the middle of the groove, an intermediate limiting cylinder fixed in the middle of the upper end of the bottom limiting plate, slots distributed at equal intervals on the intermediate limiting cylinder, and a connecting seat fixed inside the slots;

[0012] The rotating shaft at the output end of the motor top is inserted into the groove and then fixed at the middle part of the lower end of the bottom limiting plate.

[0013] Preferably, the clamping mechanism comprises a connecting shaft penetrating the connecting seat, a tensioning block fixed at the outer end of the connecting shaft, and an inner end plate fixed after the inner end of the connecting shaft is sleeved with a spring;

[0014] The tension block is slidably connected in the corresponding slot, and the outer end of the spring abuts against the inner surface of the tension block.

[0015] Preferably, the top compression cooling assembly comprises a conical head and a vertical connecting column movably connected to the upper end of the conical head through a connecting assembly;

[0016] The top side of the conical head is provided with equidistantly spaced clamping convex plates, and the bottom of the outer end of the clamping convex plate is fixed with a rubber pressing block by a vertical clamping plate;

[0017] The clamping convex plate is used to be clamped in the corresponding slot, and the rubber pressing block is used to be pressed tightly on the upper end of the spiral bevel gear;

[0018] The vertical connecting column is fixed to the lower end of the piston rod.

[0019] Preferably, the connection assembly comprises a connection tube fixed at the middle of the upper end of the conical head, an upper limit ring seat and a lower limit ring seat distributed up and down inside the connection tube, and an end cap fixed at the top of the connection tube;

[0020] A circular disk is provided at the lower part of the vertical connecting column, and the circular disk is located between the upper limit ring seat and the lower limit ring seat.

[0021] Preferably, the lower end surface of the upper limit ring seat is embedded with several groups of upper balls at equal intervals, and the bottom of the upper balls is seated on the upper end surface of the circular disk. The upper end surface of the lower limit ring seat is embedded with several groups of lower balls at equal intervals, and the circular disk is seated on the top surface of the lower balls.

[0022] Preferably, the cooling pipe system comprises a sleeve seat which is fixed after the top of the vertical connecting column passes through the end cover, a bottom tube which is fixed in the middle of the lower end of the circular plate, an annular tube whose outer end of the clamping convex plate is fixed by an inclined tube, and nozzles which are evenly spaced on the outer surface of the annular tube;

[0023] The bottom of the vertical channel inside the vertical connecting column extends to the bottom of the bottom tube, and the bottom of the bottom tube extends into the vertical opening at the top of the conical head;

[0024] The top side of the vertical channel is connected to a top transverse channel, and the outer end of the top transverse channel is located in the sleeve seat;

[0025] A bottom transverse channel communicating with the vertical opening is arranged inside the clamping convex plate, and the bottom transverse channel is communicated with the annular tube through an inclined tube.

[0026] Preferably, the height of the connection between the inclined tube and the annular tube is higher than the height of the connection between the inclined tube and the bottom transverse channel, and the outer end of the nozzle is arranged to be inclined downward.

[0027] Preferably, a sealing ring is sleeved on the bottom tube, the sealing ring is tightly attached to the upper inner wall of the vertical opening, and the height of the sealing ring is higher than the height of the bottom transverse channel.

[0028] The present invention also provides a strengthening method for a laser-shot peening strengthening device for a spiral bevel gear, which specifically comprises the following steps:

[0029] S1. Put the spiral bevel gear on the top of the sleeve clamping assembly;

[0030] S2, the piston rod of the electric cylinder extends, so that the top clamping and cooling assembly moves downward. When the top clamping and cooling assembly is pressed down and fixed on the upper end of the spiral bevel gear, the top clamping and cooling assembly is clamped with the sleeve clamping assembly, and the clamping mechanism with equal spacing inside the sleeve clamping assembly is driven to be tensioned and fixed inside the spiral bevel gear;

[0031] S3, the motor drives the sleeve clamping assembly to rotate, so that the spiral bevel gear and the top clamping cooling assembly rotate synchronously. At the same time, the mechanical arm adjusts the position of the laser assembly, and the laser assembly emits a pulsed laser beam to perform laser shot peening on the spiral bevel gear;

[0032] S4. The cooling pipe system sprays cooling medium onto the surface of the spiral bevel gear to cool the surface of the spiral bevel gear.

[0033] Compared with the prior art, the beneficial effects of the present invention are as follows: while the top clamping cooling assembly is pressed down and fixed to the upper end of the spiral bevel gear, the top clamping cooling assembly is clamped with the sleeve clamping assembly, and the clamping mechanism evenly spaced inside the driving sleeve clamping assembly is tensioned and fixed inside the spiral bevel gear, so that the spiral bevel gear can be clamped and fixed from the upper end and the inner wall at the same time, thereby ensuring that the spiral bevel gear is firmly fixed.

[0034] Driven by the motor, the sleeve clamping assembly drives the spiral bevel gear and the top clamping cooling assembly to rotate synchronously, so that the cooling pipe system on the top clamping cooling assembly and the spiral bevel gear are in a relatively static state, which is conducive to the cooling pipe system to cool the surface of the spiral bevel gear; cooling the surface of the spiral bevel gear can prevent the power of the laser component from being too high, resulting in the high-energy pulse laser beam emitted instantly generating higher temperature and pressure than expected on the surface of the spiral bevel gear, causing damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0036] Figure 2 It is a three-dimensional structural schematic diagram of the sleeve clamping assembly of the present invention;

[0037] Figure 3 It is a three-dimensional structural schematic diagram of the clamping mechanism of the present invention;

[0038] Figure 4 It is a schematic diagram of the three-dimensional structure of the top compression cooling assembly of the present invention;

[0039] Figure 5 It is a schematic cross-sectional view of the top compression cooling assembly of the present invention;

[0040] Figure 6 For the present invention Figure 5 A schematic diagram of the front view structure of

[0041] Figure 7 It is a structural schematic diagram of the spiral bevel gear of the present invention being sleeved on the outer side of the top of the intermediate limiting cylinder;

[0042] Figure 8 It is a schematic diagram of the three-dimensional structure of the spiral bevel gear after being fixed in the present invention;

[0043] Fig. 9 It is a schematic diagram of the structure of fixing the spiral bevel gear, the sleeve clamping assembly and the top pressing cooling assembly of the present invention;

[0044] Fig.10 For the present invention Fig. 9 Schematic diagram of the cross-sectional structure.

[0045] In the figure: 1, base; 2, sleeve clamping assembly; 201, bottom limit plate; 202, tension block; 203, slot; 204, connecting seat; 205, spring; 206, middle limit cylinder; 207, inner end plate; 208, connecting shaft; 3, motor; 4, groove; 5, coolant storage tank; 6, coolant pump; 7, top clamping cooling assembly; 701, vertical connecting column; 702, hose; 703, sleeve seat; 704, end cover; 705, connecting cylinder; 706, annular tube; 707, vertical clamping plate; 7 08. Rubber pressing block; 709. Conical head; 710. Snap-on convex plate; 711. Oblique tube; 712. Nozzle; 713. Top horizontal channel; 714. Vertical channel; 715. Upper limit ring seat; 716. Round disk; 717. Lower limit ring seat; 718. Sealing ring; 719. Bottom tube; 720. Bottom horizontal channel; 721. Upper ball bearing; 722. Lower ball bearing; 723. Vertical opening; 8. Bracket; 9. Electric cylinder; 10. Robotic arm; 11. Laser assembly; 12. Spiral bevel gear; 13. Piston rod. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] Example:

[0048] See also Figure 1-10 , the present invention provides a technical solution:

[0049] A laser-shot peening strengthening device for spiral bevel gears, comprising a base 1, a sleeve clamping assembly 2 is arranged in a groove 4 at the upper end of the base 1, and the top of the sleeve clamping assembly 2 is used for sleeve-connecting the spiral bevel gear 12;

[0050] The sleeve clamping assembly 2 includes a bottom limiting plate 201 disposed in the middle of the groove 4, an intermediate limiting cylinder 206 fixed in the middle of the upper end of the bottom limiting plate 201, slots 203 distributed at equal intervals on the intermediate limiting cylinder 206, and a connecting seat 204 fixed inside the slots 203;

[0051] The rotating shaft at the top output end of the motor 3 extends into the groove 4 and is fixed at the middle of the lower end of the bottom limiting plate 201 .

[0052] After the spiral bevel gear 12 is sleeved on the top of the sleeve clamping assembly 2 , the spiral bevel gear 12 is seated on the upper end of the bottom limiting plate 201 .

[0053] The clamping mechanism includes a connecting shaft 208 penetrating the connecting seat 204, a tensioning block 202 fixed to the outer end of the connecting shaft 208, and an inner end plate 207 fixed to the inner end of the connecting shaft 208 after being sleeved with a spring 205;

[0054] The tension block 202 is slidably connected in the corresponding slot 203 , and the outer end of the spring 205 abuts against the inner surface of the tension block 202 .

[0055] In the initial state, under the elastic force of the spring 205 on the inner end plate 207, the connecting shaft 208 moves inward, thereby causing the tensioning block 202 to retract into the corresponding slot 203 (such as Figure 2 As shown), this can prevent the outer end of the tensioning block 202 from extending out of the slot 203 to hinder the spiral bevel gear 12 from being sleeved on the top of the sleeve clamping assembly 2.

[0056] An electric cylinder 9 is fixed to the rear upper end of the base 1 through a bracket 8. The electric cylinder 9 is controlled by a PLC. The electric cylinder 9 adopts the Naifet servo electric cylinder series, the German FESTO servo electric cylinder series, the Japanese SMC servo electric cylinder series or other models that meet the use requirements.

[0057] The piston rod 13 at the output end of the electric cylinder 9 passes through the bracket 8 and is connected to the top compression cooling assembly 7;

[0058] The top compression cooling assembly 7 includes a conical head 709 and a vertical connecting column 701 movably connected to the upper end of the conical head 709 through a connecting assembly; the conical head 709 is arranged to be wide at the top and narrow at the bottom, so that when the conical head 709 moves downward, the conical head 709 can be abutted against the inner end disk 207, so that the inner end disk 207 pushes the outer end of the tensioning block 202 out of the slot 203 through the connecting shaft 208, so that the tensioning block 202 is closely attached to the inner wall of the spiral bevel gear 12 (such as Fig.10 As shown), the spiral bevel gear 12 and the intermediate limiting cylinder 206 are fixed coaxially, so that when the intermediate limiting cylinder 206 rotates, the spiral bevel gear 12 can be smoothly driven to rotate, and the position offset of the spiral bevel gear 12 and the intermediate limiting cylinder 206 can be avoided, thereby preventing the spiral bevel gear 12 from rotating unevenly.

[0059] The top side of the conical head 709 is provided with equidistantly spaced snap-fitting convex plates 710, and the bottom of the outer end of the snap-fitting convex plates 710 is fixed with a rubber pressing block 708 by a vertical pressing plate 707;

[0060] The clamping convex plate 710 is used to be clamped in the corresponding slot 203, and the rubber pressing block 708 is used to be pressed on the upper end of the spiral bevel gear 12;

[0061] The vertical connecting column 701 is fixed to the lower end of the piston rod 13 .

[0062] When the conical head 709 moves downward, the tension block 202 is closely attached to the inner wall of the spiral bevel gear 12 (such as Fig.10 As shown), the spiral bevel gear 12 is fixed coaxially with the intermediate limiting cylinder 206, the engaging convex plate 710 is clamped in the corresponding slot 203, and the rubber pressing block 708 is pressed against the upper end of the spiral bevel gear 12, and the spiral bevel gear 12 is pressed and fixed from the upper end.

[0063] The connection assembly includes a connection tube 705 fixed at the middle of the upper end of the conical head 709, an upper limit ring seat 715 and a lower limit ring seat 717 distributed up and down inside the connection tube 705, and an end cap 704 fixed at the top of the connection tube 705;

[0064] A circular disk 716 is provided at the lower part of the vertical connecting column 701, and the circular disk 716 is located between the upper limit ring seat 715 and the lower limit ring seat 717. Such an arrangement can prevent the circular disk 716 from tilting, and the circular disk 716 and the vertical connecting column 701 are in a stationary state (that is, the circular disk 716 and the vertical connecting column 701 do not rotate). In this way, when the motor 3 drives the bottom limit disk 201, the middle limit cylinder 206, the conical head 709 and the connecting cylinder 705 to rotate, the rotation of the connecting cylinder 705 relative to the circular disk 716 is smoother.

[0065] The lower end surface of the upper limit ring seat 715 is embedded with a plurality of groups of upper balls 721 at equal intervals, and the bottom of the upper balls 721 is seated on the upper end surface of the circular plate 716. The upper end surface of the lower limit ring seat 717 is embedded with a plurality of groups of lower balls 722 at equal intervals, and the circular plate 716 is seated on the top surface of the lower balls 722. Such an arrangement can reduce the friction between the upper and lower end surfaces of the circular plate 716 when the connecting cylinder 705 rotates relative to the circular plate 716.

[0066] The sleeve seat 703, the vertical connecting column 701, the circular disk 716 and the bottom tube 719 are integrally formed and do not rotate as a whole. The annular tube 706, the nozzle 712, the inclined tube 711, the conical head 709, the clamping convex plate 710, the vertical pressing plate 707, the rubber pressing block 708 and the connecting tube 705 are integrally formed and rotate synchronously with the intermediate limiting tube 206 and the spiral bevel gear 12 as a whole.

[0067] In this way, when the connecting tube 705, the conical head 709 and the sleeve clamping assembly 2 rotate synchronously, the cooling medium can still enter the sleeve seat 703 through the hose 702, and then enter the vertical opening 723 through the top horizontal channel 713 and the vertical channel 714. The cooling medium in the vertical opening 723 then enters the annular tube 706 through the bottom horizontal channel 720 and the inclined tube 711. Finally, the cooling medium is sprayed onto the surface of the spiral bevel gear 12 through the nozzle 712 to cool the surface of the spiral bevel gear 12.

[0068] As the conical head 709 moves downward, the engaging protruding plate 710 is engaged in the corresponding slot 203 , so that when the intermediate limiting cylinder 206 and the spiral bevel gear 12 rotate synchronously, the conical head 709 and the connecting cylinder 705 can be driven to rotate synchronously.

[0069] A laser assembly 11 is installed on the right side of the upper end of the base 1 by a mechanical arm 10, and the pulsed laser beam emitted by the laser assembly 11 is used to perform laser shot peening on the spiral bevel gear 12;

[0070] The robot arm 10 adopts industrial robots of brands such as ABB, Fanuc, and Kuka, and is controlled by advanced PLC.

[0071] The laser component 11 is a Nd:YAG solid laser, such as DATACHROM-5000 and Nimma-600 Nd:YAG solid lasers. Alternatively, the laser component 11 is a fiber-coupled semiconductor-pumped solid laser, such as cw-lfs1010, cw-lfs2030, 2050, and the like.

[0072] While the top pressing cooling assembly 7 is pressed down and fixed to the upper end of the spiral bevel gear 12, the top pressing cooling assembly 7 is clamped with the sleeve clamping assembly 2, and the clamping mechanism with equal spacing inside the drive sleeve clamping assembly 2 is tensioned and fixed inside the spiral bevel gear 12;

[0073] The motor 3 is fixed at the middle of the lower end of the base 1; the motor 3 is controlled by the PLC, and the model of the motor 3 is Mitsubishi HC-SF202B motor, Mitsubishi HG-SR702B motor, Mitsubishi HK-KT7M3UWBJ or other models that meet the use requirements.

[0074] After the spiral bevel gear 12 is clamped and fixed, the robot arm 10 adjusts the laser assembly 11 to a suitable position so that the laser assembly 11 faces the surface of the spiral bevel gear 12, and the motor 3 drives the spiral bevel gear 12 to rotate at a constant speed through the sleeve clamping assembly 2, so that the pulsed laser beam emitted by the laser assembly 11 sequentially performs laser shot peening on the spiral bevel gear 12 until the laser shot peening is completed;

[0075] Due to the uniform rotation of the spiral bevel gear 12 , the position of the laser assembly 11 only needs to be adjusted once by the mechanical arm 10 , and there is no need to frequently adjust the position of the laser assembly 11 by the mechanical arm 10 .

[0076] The sleeve clamping assembly 2 is driven by the motor 3 to drive the spiral bevel gear 12 and the top pressing and cooling assembly 7 to rotate synchronously, and the top pressing and cooling assembly 7 is also provided with a cooling pipe system for cooling the surface of the spiral bevel gear 12 .

[0077] The cooling pipe system includes a sleeve seat 703 which is fixed after the top of the vertical connecting column 701 passes through the end cover 704, a bottom tube 719 fixed in the middle of the lower end of the circular plate 716, an annular tube 706 fixed by an inclined tube 711 at the outer end of the clamping convex plate 710, and nozzles 712 distributed at equal intervals on the outer surface of the annular tube 706;

[0078] The bottom of the vertical channel 714 inside the vertical connecting column 701 extends to the bottom of the bottom tube 719, and the bottom of the bottom tube 719 extends into the vertical opening 723 at the top of the conical head 709;

[0079] The top side of the vertical channel 714 is connected to a top transverse channel 713 , and the outer end of the top transverse channel 713 is located in the sleeve seat 703 ;

[0080] A bottom transverse channel 720 communicating with the vertical opening 723 is provided inside the clamping protrusion 710 . The bottom transverse channel 720 is communicated with the annular tube 706 through the inclined tube 711 .

[0081] The cooling medium is sprayed onto the surface of the spiral bevel gear 12 through the cooling pipe system. When the cooling medium is a coolant, the cooling pipe system further includes a coolant storage tank 5 fixed to the rear of the base 1 and a coolant pump 6 installed on the top of the coolant storage tank 5. The inlet of the coolant pump 6 is extended to the bottom of the coolant storage tank 5 through an inlet pipe, and the outlet of the coolant pump 6 is connected to a liquid outlet pipe. The front end of the liquid outlet pipe penetrates the bracket 8 and is connected to the sleeve seat 703 through a hose 702.

[0082] The coolant pump 6 adopts MB40 series coolant pump or other models also adopt PLC control, such as some customized coolant pumps. These pumps are usually designed and manufactured according to customer needs and have specific functions and specifications.

[0083] The coolant pump 6 works to introduce the coolant in the coolant storage tank 5 into the sleeve seat 703. The coolant in the sleeve seat 703 then enters the vertical opening 723 through the top horizontal channel 713 and the vertical channel 714. The coolant in the vertical opening 723 then enters the annular tube 706 through the bottom horizontal channel 720 and the inclined tube 711. Finally, the coolant is sprayed onto the surface of the spiral bevel gear 12 through the nozzle 712 to cool the surface of the spiral bevel gear 12 to prevent the power of the laser assembly 11 from being too high, resulting in the high-energy pulse laser beam emitted from the surface of the spiral bevel gear 12 instantly generating a high temperature and pressure exceeding the expected level, causing damage.

[0084] When the cooling medium is natural air, the cooling pipeline system further includes an air pump, and the air outlet of the air pump is connected to the sleeve seat 703 through a hose 702;

[0085] The air pump is also controlled by PLC. When the air pump works, it compresses the air and fills it into the sleeve seat 703. The air in the sleeve seat 703 then enters the vertical opening 723 through the top horizontal channel 713 and the vertical channel 714. The air in the vertical opening 723 then enters the annular tube 706 through the bottom horizontal channel 720 and the inclined tube 711. Finally, the air is sprayed onto the surface of the spiral bevel gear 12 through the nozzle 712 to cool the surface of the spiral bevel gear 12 to prevent the power of the laser assembly 11 from being too high, which may cause damage when the emitted high-energy pulse laser beam instantly generates higher temperature and pressure than expected on the surface of the spiral bevel gear 12.

[0086] The height of the connection between the inclined tube 711 and the annular tube 706 is higher than the height of the connection between the inclined tube 711 and the bottom cross channel 720, so that the annular tube 706 can be located above the spiral bevel gear 12, and the outer end of the nozzle 712 is tilted downward, so that the cooling medium sprayed through the nozzle 712 can be sprayed downward onto the surface of the spiral bevel gear 12.

[0087] The bottom tube 719 is sleeved with a sealing ring 718, which is in close contact with the upper inner wall of the vertical opening 723, and the height of the sealing ring 718 is higher than the height of the bottom transverse channel 720. Such a configuration prevents the cooling medium entering the vertical opening 723 from leaking from the top of the vertical opening 723, thereby enabling the cooling medium in the vertical opening 723 to smoothly enter the annular tube 706 via the bottom transverse channel 720 and the inclined tube 711.

[0088] The present invention also provides a strengthening method for a laser-shot peening strengthening device for a spiral bevel gear, which specifically comprises the following steps:

[0089] S1, sleeve the spiral bevel gear 12 on the top of the sleeve clamping assembly 2;

[0090] S2, the piston rod 13 of the electric cylinder 9 extends, so that the top pressing and cooling assembly 7 moves downward. When the top pressing and cooling assembly 7 is pressed down and fixed to the upper end of the spiral bevel gear 12, the top pressing and cooling assembly 7 is clamped with the sleeve clamping assembly 2, and the clamping mechanism with equal spacing inside the sleeve clamping assembly 2 is driven to be tensioned and fixed inside the spiral bevel gear 12;

[0091] S3, the motor 3 drives the sleeve clamping assembly 2 to rotate, so that the spiral bevel gear 12 and the top pressing and cooling assembly 7 rotate synchronously. At the same time, the mechanical arm 10 adjusts the position of the laser assembly 11, and the laser assembly 11 emits a pulsed laser beam to perform laser shot peening on the spiral bevel gear 12;

[0092] S4. The cooling pipeline system sprays cooling medium onto the surface of the spiral bevel gear 12 to cool the surface of the spiral bevel gear 12.

[0093] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A laser-shot peening device for spiral bevel gears, comprising a base, characterized in that: A sleeve clamping assembly is provided in the groove at the upper end of the base, and the top of the sleeve clamping assembly is used for sleeve-connecting the spiral bevel gear; An electric cylinder is fixed to the rear of the upper end of the base through a bracket, and a piston rod at the output end of the electric cylinder passes through the bracket and is connected to a top compression cooling assembly; A laser assembly is installed on the right side of the upper end of the base by a mechanical arm, and the pulsed laser beam emitted by the laser assembly is used to perform laser shot peening on the spiral bevel gear; While the top pressing and cooling assembly is pressed down and fixed on the upper end of the spiral bevel gear, the top pressing and cooling assembly is clamped with the sleeve clamping assembly, and the clamping mechanism with equal spacing inside the drive sleeve clamping assembly is tensioned and fixed inside the spiral bevel gear; The sleeve clamping assembly is driven by the motor to drive the spiral bevel gear and the top pressing and cooling assembly to rotate synchronously, and the top pressing and cooling assembly is also provided with a cooling pipe system for cooling the surface of the spiral bevel gear.

2. The laser-shot peening device for spiral bevel gears according to claim 1, characterized in that: The motor is fixed to the middle part of the lower end of the base; The sleeve clamping assembly comprises a bottom limiting plate arranged in the middle of the groove, an intermediate limiting cylinder fixed in the middle of the upper end of the bottom limiting plate, slots distributed at equal intervals on the intermediate limiting cylinder, and a connecting seat fixed inside the slots; The rotating shaft at the output end of the motor top is inserted into the groove and then fixed at the middle part of the lower end of the bottom limiting plate.

3. The laser-shot peening device for spiral bevel gears according to claim 2, characterized in that: The clamping mechanism comprises a connecting shaft penetrating the connecting seat, a tensioning block fixed at the outer end of the connecting shaft, and an inner end plate fixed after the inner end of the connecting shaft is sleeved with a spring; The tension block is slidably connected in the corresponding slot, and the outer end of the spring abuts against the inner surface of the tension block.

4. The laser-shot peening device for spiral bevel gears according to claim 1, characterized in that: The top compression cooling assembly includes a conical head and a vertical connecting column movably connected to the upper end of the conical head through a connecting assembly; The top side of the conical head is provided with equidistantly spaced clamping convex plates, and the bottom of the outer end of the clamping convex plate is fixed with a rubber pressing block by a vertical clamping plate; The clamping convex plate is used to be clamped in the corresponding slot, and the rubber pressing block is used to be pressed tightly on the upper end of the spiral bevel gear; The vertical connecting column is fixed to the lower end of the piston rod.

5. The laser-shot peening device for spiral bevel gears according to claim 4, characterized in that: The connecting assembly comprises a connecting tube fixed at the middle of the upper end of the conical head, an upper limit ring seat and a lower limit ring seat distributed up and down inside the connecting tube, and an end cap fixed at the top of the connecting tube; A circular disk is provided at the lower part of the vertical connecting column, and the circular disk is located between the upper limit ring seat and the lower limit ring seat.

6. The laser-shot peening device for spiral bevel gears according to claim 5, characterized in that: The lower end surface of the upper limit ring seat is embedded with several groups of upper balls at equal intervals, and the bottom of the upper balls is located on the upper end surface of the circular disk. The upper end surface of the lower limit ring seat is embedded with several groups of lower balls at equal intervals, and the circular disk is located on the top surface of the lower balls.

7. The laser-shot peening device for spiral bevel gears according to claim 5, characterized in that: The cooling pipe system comprises a sleeve seat which is fixed after the top of the vertical connecting column passes through the end cover, a bottom tube which is fixed in the middle of the lower end of the circular plate, an annular tube whose outer end of the clamping convex plate is fixed by an inclined tube, and nozzles which are evenly spaced on the outer surface of the annular tube; The bottom of the vertical channel inside the vertical connecting column extends to the bottom of the bottom tube, and the bottom of the bottom tube extends into the vertical opening at the top of the conical head; The top side of the vertical channel is connected to a top transverse channel, and the outer end of the top transverse channel is located in the sleeve seat; A bottom transverse channel communicating with the vertical opening is arranged inside the clamping convex plate, and the bottom transverse channel is communicated with the annular tube through an inclined tube.

8. The laser-shot peening device for spiral bevel gears according to claim 7, characterized in that: The height of the connection between the inclined tube and the annular tube is higher than the height of the connection between the inclined tube and the bottom transverse channel, and the outer end of the nozzle is arranged to be inclined downward.

9. The laser-shot peening device for spiral bevel gears according to claim 7, characterized in that: A sealing ring is sleeved on the bottom tube, the sealing ring is tightly attached to the upper inner wall of the vertical opening, and the height of the sealing ring is higher than the height of the bottom transverse channel.

10. A strengthening method for a laser-shot peening device for spiral bevel gears according to any one of claims 1 to 9, characterized in that: The specific steps include: S1. Put the spiral bevel gear on the top of the sleeve clamping assembly; S2, the piston rod of the electric cylinder extends, so that the top clamping and cooling assembly moves downward. When the top clamping and cooling assembly is pressed down and fixed on the upper end of the spiral bevel gear, the top clamping and cooling assembly is clamped with the sleeve clamping assembly, and the clamping mechanism with equal spacing inside the sleeve clamping assembly is driven to be tensioned and fixed inside the spiral bevel gear; S3, the motor drives the sleeve clamping assembly to rotate, so that the spiral bevel gear and the top clamping cooling assembly rotate synchronously. At the same time, the mechanical arm adjusts the position of the laser assembly, and the laser assembly emits a pulsed laser beam to perform laser shot peening on the spiral bevel gear; S4. The cooling pipe system sprays cooling medium onto the surface of the spiral bevel gear to cool the surface of the spiral bevel gear.

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