CN-122007998-A - High-strength and high-toughness light-weight crystal grain dynamic refining device for gearbox shell casting

Abstract

The invention relates to the technical field of dynamic grain refinement, and discloses a high-strength and high-toughness lightweight gearbox casing casting grain dynamic refinement device which comprises a base, wherein a guide rail frame is fixedly connected to the top of the base, a bearing frame is connected to the guide rail frame in a sliding manner, a luffing rod is arranged on the bearing frame, a threaded rod is fixedly connected to the bottom of the luffing rod, a tool head is arranged on the threaded rod, a thread groove is formed in the top of the tool head, a fastening groove is formed in the bottom of the threaded rod, a sleeve is fixedly connected to the inner top wall of the fastening groove, an inner rod is connected to the bottom opening of the sleeve in a sliding manner, gas is filled between the top of the inner rod and the inner top wall of the sleeve, an expansion frame is fixedly connected to the inner bottom wall of the thread groove, mounting frames are fixedly connected to the inner walls of two sides of an expansion opening, connecting plates are connected to each other in a rotating manner, and a baffle is connected between the two connecting plates in a rotating manner, so that the dynamic grain refinement device of the high-strength and high-toughness lightweight gearbox casing casting grain dynamic refinement device is remarkably improved.

Inventors

• LI ZHIYUAN
• JIANG CHUNZHU
• LI DONGJUN

Assignees

• 莱州伟隆阀门有限公司

Dates

Publication Date

20260512

Application Date

20260414

Claims (10)

1. 1. The utility model provides a high-strength and high-toughness lightweight gearbox housing casting's grain dynamic refining device, includes base (1), the top fixedly connected with guide rail frame (11) of base (1), sliding connection has bearing frame (12) on guide rail frame (11), install luffing rod (2) on bearing frame (12), the top fixedly connected with transducer (22) of luffing rod (2), the bottom fixedly connected with threaded rod (3) of luffing rod (2), install tool head (5) on threaded rod (3), screw thread groove (51) have been seted up at the top of tool head (5), tool head (5) pass through screw thread groove (51) and threaded rod (3) threaded connection, fastening groove (31) have been seted up to the bottom of threaded rod (3), interior roof fixedly connected with sleeve (4) of fastening groove (31), the bottom opening part sliding connection of sleeve (4) has interior pole (41), fill gas between the top of interior roof of interior pole (41) and sleeve (4); The expansion device is characterized in that an expansion frame (6) is fixedly connected to the inner bottom wall of the thread groove (51), an expansion opening (61) is formed in the top of the expansion frame (6), the threaded rod (3) is sleeved outside the expansion frame (6) through a fastening groove (31), mounting frames (7) are fixedly connected to the inner walls of the two sides of the expansion opening (61), connecting plates (71) are rotatably connected to the mounting frames (7), a baffle (72) is rotatably connected between the two connecting plates (71), and the baffle (72) is located under the inner rod (41).
2. 2. The high-strength and high-toughness light-weight gearbox housing casting grain dynamic refining device is characterized in that limiting plates (8) are fixedly connected to the bottom of a mounting frame (7), storage grooves (81) are formed in the tops of the limiting plates (8), fixing grooves (82) are formed in the inner walls of two sides of each storage groove (81), shaft rods (83) are rotatably connected in the fixing grooves (82), top plates (84) are fixedly connected between the two shaft rods (83), the top plates (84) are located in the storage grooves (81), and torsion springs (85) are fixedly connected between each shaft rod (83) and the inner walls of the fixing grooves (82) on the same side.
3. 3. The device for dynamically refining the crystal grains of the high-strength and high-toughness lightweight gearbox housing casting according to claim 1, wherein the inner rod (41) is provided with a sealing groove (42), a sealing ring (43) is embedded in the sealing groove (42), the inner rod (41) is provided with a plurality of air holes (44) used for communicating the sealing groove (42) and the top space of the inner rod (41), and the bottom of the inner rod (41) is embedded with a movably connected ball (45).
4. 4. The device for dynamically refining the crystal grains of the high-strength and high-toughness lightweight gearbox housing casting according to claim 1, wherein a plurality of mounting grooves (75) are formed in the baffle plate (72) close to the two sides of the connecting plate (71), limiting blocks (76) are slidably connected in the mounting grooves (75), and a plurality of springs (77) are fixedly connected between the limiting blocks (76) and the inner walls of the mounting grooves (75).
5. 5. The device for dynamically refining the crystal grains of the high-strength and high-toughness lightweight gearbox housing casting according to claim 4, wherein limit arc grooves (74) corresponding to the number and the positions of the mounting grooves (75) are formed in one side, close to the baffle (72), of each connecting plate (71), and cambered surfaces are formed in one side, close to the limit arc grooves (74) corresponding to the positions, of each limit block (76).
6. 6. The device for dynamically refining the crystal grains of the high-strength and high-toughness lightweight gearbox housing casting according to claim 3, wherein the top of the baffle plate (72) is provided with a positioning groove (73), and the bottom of the ball (45) is in contact with the inner bottom wall of the positioning groove (73).
7. 7. The device for dynamically refining the crystal grains of the high-strength and high-toughness lightweight gearbox housing casting, which is disclosed in claim 1, is characterized in that a solution barrel (9) filled with aluminum alloy solution is arranged on one side of the base (1) close to the guide rail frame (11), and the solution barrel (9) is positioned under the tool head (5).
8. 8. The device for dynamically refining the crystal grains of the high-strength and high-toughness lightweight gearbox housing casting, which is disclosed in claim 1, is characterized in that a flange plate (21) is fixedly connected to the amplitude transformer (2), and the amplitude transformer (2) is fixed on a bearing frame (12) through the flange plate (21).
9. 9. The device for dynamically refining the crystal grains of the high-strength and high-toughness lightweight gearbox housing casting is characterized in that a screw rod (13) is rotationally connected to the guide rail frame (11), and the bearing frame (12) is in threaded connection with the screw rod (13).
10. 10. The device for dynamically refining the crystal grains of the high-strength and high-toughness lightweight gearbox casing casting is characterized in that a motor (14) is fixedly connected to the top of the guide rail frame (11), and the output end of the motor (14) is fixedly butted with the top end of the screw rod (13).

Description

High-strength and high-toughness light-weight crystal grain dynamic refining device for gearbox shell casting Technical Field The invention relates to the technical field of dynamic grain refinement, in particular to a dynamic grain refinement device for a high-strength and high-toughness lightweight gearbox shell casting. Background The gearbox shell is a key bearing component in an automobile power assembly, the gearbox shell is taken as a high-strength and high-toughness lightweight structural component and is usually cast by adopting aluminum alloy, in order to meet the service performance requirement of the gearbox shell, the grain structure of a casting is usually required to be refined, and the dynamic refinement of the grains is a technology for applying a physical external field to interfere with a melt in the metal solidification process, and the uniform refined equiaxed crystal structure is obtained by breaking dendrites and increasing the number of crystal nuclei, so that the gearbox shell is an important means for improving the comprehensive performance of the gearbox shell; The ultrasonic grain refinement is a mainstream method in a dynamic refinement technology, the core device comprises a transducer, an amplitude transformer and a tool head, the transducer converts electric energy into high-frequency vibration, the high-frequency vibration is amplified by the amplitude transformer and then transmitted to the tool head, the tool head is immersed in a metal melt, dendrites are broken by utilizing cavitation effect of ultrasonic waves, the grain refinement is realized, and the ultrasonic grain refinement is widely applied to casting of an aluminum alloy gearbox shell; In the use process of the existing ultrasonic grain refining device, a luffing rod and a tool head are usually connected by threads, but under the action of ultrasonic high-frequency vibration, the thread connection is subjected to alternating load, loosening is easy to occur, the energy transmission efficiency is reduced, the tool head is seriously fallen off, the production safety and the casting quality are influenced, and therefore, the device for dynamically refining the grains of the high-strength, high-toughness and light-weight gearbox shell casting is provided. Disclosure of Invention The invention aims to provide a crystal grain dynamic refining device for a high-strength and high-toughness lightweight gearbox housing casting, which aims to solve the problems in the prior art. The high-strength and high-toughness light-weight gearbox casing casting grain dynamic refining device comprises a base, wherein the top of the base is fixedly connected with a guide rail frame, the guide rail frame is connected with a bearing frame in a sliding manner, an amplitude transformer is arranged on the bearing frame, the top of the amplitude transformer is fixedly connected with a transducer, the bottom of the amplitude transformer is fixedly connected with a threaded rod, a tool head is arranged on the threaded rod, the top of the tool head is provided with a thread groove, the tool head is in threaded connection with the threaded rod through the thread groove, the bottom of the threaded rod is provided with a fastening groove, the inner top wall of the fastening groove is fixedly connected with a sleeve, an inner rod is connected to the opening of the bottom of the sleeve in a sliding manner, and gas is filled between the top of the inner rod and the inner top wall of the sleeve; The expansion device is characterized in that an expansion frame is fixedly connected with the inner bottom wall of the thread groove, an expansion opening is formed in the top of the expansion frame, the threaded rod is sleeved outside the expansion frame through a fastening groove, mounting frames are fixedly connected to the inner walls of the two sides of the expansion opening, connecting plates are connected to the mounting frames in a rotating mode, a baffle is connected between the two connecting plates in a rotating mode, and the baffle is located right below the inner rod. Preferably, the bottom of mounting bracket is all fixedly connected with limiting plate, accomodate the groove has been seted up at the top of limiting plate, accomodate the both sides inner wall in groove and all seted up the fixed slot, all rotate in the fixed slot and be connected with the axostylus axostyle, two fixedly connected with roof between the axostylus axostyle, the roof is located accomodates the inslot, every fixedly connected with torsional spring between axostylus axostyle and the fixed slot inner wall of homonymy. Preferably, the inner rod is provided with a sealing groove, a sealing ring is embedded in the sealing groove, a plurality of air holes used for communicating the sealing groove with the top space of the inner rod are formed in the inner rod, and the bottom of the inner rod is embedded with a ball which is movably connected. Preferably, a plurality of mou