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CN-122007748-A - Heavy-duty railway frog welding device and welding method thereof

CN122007748ACN 122007748 ACN122007748 ACN 122007748ACN-122007748-A

Abstract

The invention discloses a heavy-duty railway frog welding device and a welding method thereof, belonging to the frog welding field, comprising a supporting seat, wherein the upper end of the supporting seat is internally provided with a moving component, the rear end of the supporting seat is provided with a gravity block, the front end of the supporting seat is provided with a position adjusting component at the rear end of the supporting frame, and the air cylinder, the first/second one-way valve, the piston block and the like are driven by a motor to continuously inject air into the closed air cylinder and maintain constant internal air pressure by utilizing an adjustable exhaust valve. The constant air pressure drives the piston block and in turn applies a constant downward force to the weld head through the multi-angle bar. When the surface of the workpiece is uneven or the welding head is displaced, the piston blocks can slide in the air cylinders for compensation, and the contact pressure of the welding head to the frog is automatically kept constant. The problems of uneven welding bead, inconsistent penetration and the like caused by pressure fluctuation in the traditional manual or simple automatic welding are fundamentally solved, and the uniformity and high reliability of the welding seam are ensured.

Inventors

  • LI YONG
  • LI BINQIANG
  • Ding Wangcai

Assignees

  • 兰州交通大学

Dates

Publication Date
20260512
Application Date
20260408

Claims (10)

  1. 1. The heavy-duty railway frog welding device comprises a supporting seat (1) and is characterized in that a moving assembly is arranged in the upper end of the supporting seat (1), a gravity block (2) is arranged at the rear end of the supporting seat (1), a supporting frame (7) is arranged at the front end of the supporting seat (1), a position adjusting assembly is arranged at the rear end of the supporting frame (7), and a constant force welding assembly is arranged in the supporting frame (7); The constant force welding assembly comprises an electric rod (9) fixedly connected to two sides of the upper end of a supporting frame (7), a moving block (10) is fixedly connected to the output end of the electric rod (9), a first motor (8) is fixedly connected to the upper end of the supporting frame (7), a first rectangular rod (26) is slidably connected to the output end of the first motor (8), an air cylinder (20) is fixedly connected to the inner side of the moving block (10), the upper end of the air cylinder (20) is fixedly connected to the lower end of the first rectangular rod (26), a first round block (46) is fixedly connected to the inner side of the air cylinder (20), a first one-way valve (47) is fixedly connected to the inner side of the first round block (46), a second round block (52) is fixedly connected to the inner upper end of the air cylinder (20), a second one-way valve (53) is fixedly connected to the inner side of the second round block (52), a vertical rod (49) is fixedly connected to the upper end of the inner side of the first round block (46), a spring (52) is fixedly connected to the inner side of the wall of the second round block (52), a second round block (52) is fixedly connected to the inner side of the second round block (52), a spring (52) is fixedly connected to the inner side of the upper end of the second round block (52), the left side fixedly connected with blast pipe (28) of inflator (20), the inside swing joint of inflator (20) has piston piece (57), the lower extreme fixedly connected with polygonal rod (56) of piston piece (57), the lower extreme fixedly connected with soldered connection (25) of polygonal rod (56), the wall of polygonal rod (56) and movable block (10) sliding connection.
  2. 2. The heavy haul railway frog welding device according to claim 1, wherein a rectangular block (42) is fixedly connected to the inside of the exhaust pipe (28), a screw rod (29) is rotatably connected to the left side of the rectangular block (42), a rectangular groove is formed in the rectangular block (42), a push block (30) is connected to the rod wall of the screw rod (29) through threads, a second spring (32) is fixedly connected to the right side of the push block (30), a push rod (33) is fixedly connected to the right side of the second spring (32), a blocking block (31) is fixedly connected to the right side of the push rod (33), and the push rod (33) slides in the rectangular groove.
  3. 3. The welding set for heavy haul railway frog of claim 1, wherein said air cylinders (20) are provided with air holes (50) at both upper and lower positions.
  4. 4. The welding device for heavy haul railway frog of claim 1, wherein the right side of moving block (10) is rotatably connected with a rotating rod (44), the upper end of rotating rod (44) is in transmission connection with the lower end of the rod wall of first rectangular rod (26) through a belt (59), the lower end of rotating rod (44) is slidably connected with a second rectangular rod (21), the left side of moving block (10) is slidably connected with a supporting rod (23), the upper end of supporting rod (23) is fixedly connected with a third spring (24), the lower end of supporting rod (23) is fixedly connected with a round block (22), the inside of round block (22) is fixedly connected with a cross plate (40), the upper end of cross plate (40) is rotatably connected with an annular block (39), the upper end of annular block (39) is fixedly connected with a toothed ring (34), the lower end of second rectangular rod (21) is fixedly connected with a first gear (35), the outer side of first gear (35) is in engagement with the toothed ring (34), the inside of annular block (39) is fixedly connected with a first bump (37), the lower end of the transverse plate (40) is provided with a contact rod (45).
  5. 5. The heavy haul railway frog welding device according to claim 4, wherein a cylinder (41) is fixedly connected to the lower end of the cross plate (40), the lower end of the cylinder (41) is slidably connected to a rod wall of a contact rod (45), and a fourth spring (60) is fixedly connected to the upper end of the contact rod (45).
  6. 6. The heavy haul railway frog welding device according to claim 4, wherein a rotating ring (36) is rotatably connected to the outer side of the circular block (22), the inner wall of the rotating ring (36) is fixedly connected with a toothed ring (34), and a cleaning brush (27) is fixedly connected to the lower end of the rotating ring (36).
  7. 7. The heavy haul railway frog welding device according to claim 1, wherein the moving assembly comprises a second gear (19) rotatably connected inside the supporting seat (1), a toothed bar (3) is fixedly connected to the front and rear positions of the second gear (19), a clamping block (4) is rotatably connected to the lower end of the toothed bar (3), a moving wheel (6) is rotatably connected to the inside of the clamping block (4), a fifth spring (58) is fixedly connected to one side of the toothed bar (3), and one end of the fifth spring (58) is fixedly connected with the inside of the supporting seat (1).
  8. 8. The heavy haul railway frog welding device according to claim 1, wherein sliding rods (18) are fixedly connected to the front and rear positions of the supporting seat (1) and respectively located on two sides of the supporting seat (1), and the rod walls of the sliding rods (18) are in sliding connection with the inside of the toothed bars (3).
  9. 9. The heavy haul railway frog welding device according to claim 1, wherein the position adjusting component comprises a sliding groove (16) formed in the supporting seat (1), a sliding block (15) is slidably connected in the sliding groove (16), a connecting rod (11) is rotatably connected in the sliding block (15), the front end of the connecting rod (11) is fixedly connected with the rear end of the supporting frame (7), a second motor (5) is fixedly connected to the right side of the supporting seat (1), a threaded rod (12) is fixed to the output end of the second motor (5), a moving groove (17) is formed in the supporting seat (1), a third gear (13) is fixedly connected to the rear end of the connecting rod (11), and a tooth block (14) is fixedly connected to the bottom of the rear end of the sliding groove (16) and is meshed with the outer side of the third gear (13).
  10. 10. A welding method suitable for use in a heavy haul railway frog welding device according to any one of claims 1-9, comprising the steps of: S1, moving and fixing the welding device on a track of a heavy haul railway frog through a moving assembly, and balancing the device through a gravity block (2); S2, starting a position adjusting assembly according to the outline of a to-be-welded part of the frog, and adjusting the longitudinal position and the inclination angle of the support frame (7) to align and adapt the welding head (25) to the to-be-welded surface; S3, starting a first motor (8), driving a first rectangular rod (26) and a rotating block (51) to rotate, enabling a contact block (55) to periodically push an inclined block (54) and a second round block (52) to move downwards, compressing a first spring (48) and continuously pressing gas into a cavity above a piston block (57) of an air cylinder (20) through the cooperation of a first one-way valve (47) and a second one-way valve (53); S4, pushing the piston block (57) and the polygonal rod (56) by continuously increasing gas pressure in the gas cylinder (20) to enable the welding head (25) to downwards contact the surface of the frog, and automatically exhausting to maintain constant internal gas pressure when the pressure in the gas cylinder (20) exceeds a threshold value set by the block (31) and the second spring (32) in the exhaust pipe (28), so that the welding head (25) applies a constant downward welding pressure to the frog; s5, in the welding process, power of the first motor (8) is transmitted through the belt (59), the rotating rod (44) and the second rectangular rod (21), the first gear (35) is driven to be meshed with the toothed ring (34) to enable the annular block (39) to rotate, the first protruding block (37) on the annular block (39) periodically impacts the second protruding block (43) on the transverse plate (40) to generate vibration and transmit the vibration to the frog through the contact rod (45) to optimize a molten pool, and meanwhile, the toothed ring (34) drives the rotating ring (36) and the cleaning brush (27) to rotate to clean the surface of a welding area.

Description

Heavy-duty railway frog welding device and welding method thereof Technical Field The invention relates to the field of frog welding, in particular to a heavy-duty railway frog welding device and a welding method thereof. Background The heavy-duty railway frog is a core stress component of a turnout, and under the condition of bearing huge impact and rolling of train wheel pairs for a long time, key parts such as a head rail, a wing rail and the like are extremely easy to be damaged such as abrasion, crushing or cracking. The high-efficiency and high-quality field welding repair of the damages is an indispensable key technical means for guaranteeing the running safety of railways and prolonging the service life of frog. At present, the repairing surface of the frog is generally uneven and has a certain contour angle. Conventional welding equipment or manual welding has difficulty maintaining a constant pressure of the welding gun against the workpiece during the welding process. Too much pressure can easily cause penetration and overheating of the parent metal, and too little pressure can cause poor fusion and incomplete penetration. The fluctuation of pressure can directly influence the stability of a welding pool, the penetration and the forming quality of a welding seam, and is a main reason for uneven performance and defects of the welding seam. The Chinese patent publication number discloses a heavy-duty railway frog welding device and a welding method thereof, a forging table cleaning device, and the prior art Therefore, a heavy-duty railway frog welding device and a welding method thereof are provided. Disclosure of Invention Aiming at the problems existing in the prior art, the invention aims to provide a heavy-duty railway frog welding device and a welding method thereof, which can keep the interaction force between a welding head and a frog constant. In order to solve the problems, the invention adopts the following technical scheme. The heavy-duty railway frog welding device comprises a supporting seat, wherein a movable assembly is arranged in the upper end of the supporting seat, a gravity block is arranged at the rear end of the supporting seat, a supporting frame is arranged at the front end of the supporting seat, a position adjusting assembly is arranged at the rear end of the supporting frame, and a constant force welding assembly is arranged in the supporting frame; The constant force welding assembly comprises an electric rod fixedly connected to two sides of the upper end of a supporting frame, a moving block is fixedly connected to the output end of the electric rod, a first motor is fixedly connected to the upper end of the supporting frame, a first rectangular rod is slidably connected to the output end of the first motor, a first spring is fixedly connected to the rod wall of the first motor, an inclined block is fixedly connected to the upper end of the air cylinder, a rotating block is fixedly connected to the lower end of the first rectangular rod, a first round block is fixedly connected to the inner part of the air cylinder, a first check valve is fixedly connected to the inner part of the first round block, a second round block is slidably connected to the inner part of the second round block, a vertical rod is fixedly connected to the two sides of the upper end of the first round block, a polygonal piston is fixedly connected to the rod wall of the vertical rod, and the piston is fixedly connected to the lower end of the piston rod Preferably, the inside fixedly connected with rectangle piece of blast pipe, the left side of rectangle piece rotates and is connected with the lead screw, the inside of rectangle piece is equipped with the rectangular channel, the pole wall threaded connection of lead screw has the ejector pad, the right side fixedly connected with second spring of ejector pad, the right side fixedly connected with push rod of second spring, the right side fixedly connected with sprue of push rod, the push rod is located the inside slip in rectangular channel. Preferably, the upper and lower positions of the inflator are provided with air holes. Preferably, the right side of movable block rotates and is connected with the bull stick, the upper end of bull stick passes through belt drive with the wall lower extreme of first rectangle pole and is connected, the lower extreme sliding connection of bull stick has the second rectangle pole, the left side sliding connection of movable block has the bracing piece, the upper end fixedly connected with third spring of bracing piece, the lower extreme fixedly connected with circular piece of bracing piece, the inside fixedly connected with diaphragm of circular piece, the upper end rotation of diaphragm is connected with annular piece, the upper end fixedly connected with ring gear of annular piece, the lower extreme fixedly connected with first gear of second rectangle pole, the outside and the ring gear meshing of first g