CN214769577U - Welding device for fracture of large crankshaft of high-pressure pump body - Google Patents
Welding device for fracture of large crankshaft of high-pressure pump body Download PDFInfo
- Publication number
- CN214769577U CN214769577U CN202121342985.8U CN202121342985U CN214769577U CN 214769577 U CN214769577 U CN 214769577U CN 202121342985 U CN202121342985 U CN 202121342985U CN 214769577 U CN214769577 U CN 214769577U
- Authority
- CN
- China
- Prior art keywords
- fixing frame
- clamping
- welding
- bottom plate
- support
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The utility model discloses a welding device for fracture of a large crankshaft of a high-pressure pump body, which comprises a structural part tool bottom plate, wherein a left bracket is fixedly arranged on one side of the structural part tool bottom plate, a right bracket is arranged on the other side of the structural part tool bottom plate in a sliding manner, and a right bracket adjusting device is arranged between the right bracket and the structural part tool bottom plate; the left bracket and the right bracket are respectively provided with a left clamping fixing frame and a right clamping fixing frame in a rotatable way; a left fixing frame adjusting device is movably arranged between the left clamping fixing frame and the left support, and a right fixing frame adjusting device is movably arranged between the right clamping fixing frame and the right support. The utility model also discloses a cracked repair technology of the large-scale bent axle of the high-pressure pump body. Use the utility model discloses can implement fast and accomplish the welding restoration of the large-scale bent axle fracture of the high-pressure pump body, reduce purchasing cost, reduce long-time process and shut down the loss, provide the guarantee for reasonable group's product.
Description
Technical Field
The utility model belongs to the technical field of the welding, a cracked welding set of large-scale bent axle of high-pressure pump body and repair technology is related to.
Background
At present, Baowuma steel track traffic materials science and technology limited company key department high pressure pump room, after several rounds of transformation, 12 present disjunctor high pressure water pumps, the high pressure water of transport is responsible for rolling of the rim flange of rim hydraulic press for a long time, but because several local high pressure water pump core drive bent axle spares are examining and repairing the installation and are connected the motor size not accurate enough, including bent axle body lubricating medium quality not up to standard, lead to the key festival of large-scale bent axle acting to produce the fracture in incessant reciprocating motion in-process, not only need a large amount of spares expenses if wholly change bent axle spare part, and because of not having new spare part, purchase processing new spare part cycle length, must influence production. In order to recover production as soon as possible, a welding device for the fracture of the large crankshaft of the high-pressure pump body needs to be designed, a repair process based on alloy base metal needs to be formulated and perfected, the fracture welding repair attack of the large crankshaft of the high-pressure pump body is developed, and the large crankshaft of the fractured high-pressure pump body can be repeatedly used economically, safely and reliably. In addition, the main difficulty of the welding repair of the large crankshaft fracture of the high-pressure pump body is as follows: 1. the irregular shape of the crankshaft body is difficult to control the assembly and all-position welding of the fracture part; 2. the alloy steel welding ensures that the deformation of the whole structural member is controlled within an effective range while eliminating welding stress through preheating, interlayer temperature control and postweld heat treatment; 3. after the welding of the fracture part is finished, the surface is purely manually ground but the precision of the crankshaft use must be achieved; 4. finally, the integrally repaired large crankshaft cannot generate structural deformation after being installed, the internal organization cannot be affected to generate various performance which does not reach the standard, and particularly, the surface of the welded and repaired large crankshaft cannot have any welding defects so as to avoid the subsequent influence on the service cycle quality of the high-pressure water pump.
SUMMERY OF THE UTILITY MODEL
The cracked problem that needs the welding to repair of appearing splitting to the large-scale bent axle that exists in the background art, the utility model provides a cracked welding set of the large-scale bent axle of high-pressure pump body and repair technology to implement and verify, use the utility model discloses can implement fast and accomplish the welding repair of the large-scale bent axle fracture of high-pressure pump body, reduce purchasing cost, reduce long-time process and shut down the loss, provide the guarantee for reasonable group's product.
The utility model provides a technical problem's technical scheme as follows:
the utility model relates to a welding device for fracture of a large crankshaft of a high-pressure pump body, which comprises a structural part tool bottom plate, wherein a left bracket is fixedly arranged on one side of the structural part tool bottom plate, a right bracket is arranged on the other side of the structural part tool bottom plate in a sliding manner, and a right bracket adjusting device is arranged between the right bracket and the structural part tool bottom plate; the left bracket and the right bracket are respectively provided with a left clamping fixing frame and a right clamping fixing frame in a rotatable way; a left fixing frame adjusting device is movably arranged between the left clamping fixing frame and the left support, and a right fixing frame adjusting device is movably arranged between the right clamping fixing frame and the right support.
As a further improvement of the technical scheme, sliding grooves are correspondingly formed in the front edge and the rear edge of one side, connected with the right support in a sliding mode, of the structural part tooling bottom plate, a sliding bottom plate is fixedly arranged at the bottom of the right support, and the sliding bottom plate is arranged in the sliding grooves.
As a further improvement of the technical scheme, the right support adjusting device comprises a fixing plate fixedly arranged on the upper surface of the structural part tool bottom plate, and the fixing plate is correspondingly provided with a threaded hole in the lower part of the right support and is connected with the right support adjusting bolt.
As the further improvement of the technical scheme, a plurality of left support reinforcing plates are welded between the left support and the structural part tooling bottom plate, and a plurality of right support reinforcing plates are welded between the right support and the sliding bottom plate.
As a further improvement of the technical scheme, the upper part of the left bracket is provided with a through hole, one side of the left clamping fixing frame is provided with a left cylindrical connecting part matched with the through hole on the left bracket and is rotatably arranged in the through hole, the other side of the left clamping fixing frame is provided with a U-shaped left clamping fixing frame clamping part, and two end parts of the left clamping fixing frame clamping part are respectively and correspondingly provided with a first clamping bolt; the upper portion of right branch frame has seted up the through-hole, the one side that the right side pressed from both sides tight mount is provided with the left cylindric connecting portion of through-hole looks adaptation on the right branch frame and rotatable the setting in this through-hole, and its opposite side is provided with the right side of "U" shape and presss from both sides tight mount clamping part, and two tip that this right side pressed from both sides tight mount clamping part are corresponding respectively to be provided with the second centre gripping bolt.
As the further improvement of the technical scheme, the left fixing frame adjusting device comprises a left support rotating shaft with one end rotatably connected with the lower portion of the left support, the other end of the left support rotating shaft is vertically and rotatably provided with a left support rotating nut, the left support rotating nut is in threaded connection with a left support adjusting threaded guide rod, and the other end of the left support adjusting threaded guide rod is movably connected with one side of the left clamping fixing frame clamping portion through a first fixing pin.
As the further improvement of the technical scheme, the right fixing frame adjusting device comprises a right support rotating shaft with one end rotatably connected with the lower part of the right support, the other end of the right support rotating shaft is vertically and rotatably provided with a right support rotating nut, the right support rotating nut is in threaded connection with a right support adjusting threaded guide rod, and the other end of the right support adjusting threaded guide rod is movably connected with one side of the right clamping fixing frame clamping part through a second fixing pin.
The utility model relates to a repair process for large-scale crankshaft fracture of a high-pressure pump body, the crankshaft is divided into a crankshaft left part and a crankshaft right part after fracture, a left bevel face and a right bevel face for butt repair are respectively arranged at the fracture positions to be repaired at the crankshaft left part and the crankshaft right part, the broken welding device of the large-scale crankshaft of the high-pressure pump body is repaired, the left part and the right part of the crankshaft are respectively fixed on the left clamping fixing frame and the right clamping fixing frame, the distance between the left part of the crankshaft and the right part of the crankshaft is adjusted through the right bracket adjusting device, so that the left bevel face and the right bevel face meet the gap requirement of welding repair, the angles of the left clamping fixed frame and the right clamping fixed frame are respectively adjusted through the left fixed frame adjusting device and the right fixed frame adjusting device, the left bevel face and the right bevel face meet the butt joint requirement of welding repair, and the welding process comprises the following steps:
step one, preparing before welding;
1.1), welding equipment: HT400D digital control inversion type manual direct current argon arc welding machine adopts E7015 welding rod, direct current is connected reversely;
1.2), cleaning before welding: cleaning the welding position before welding to prevent oil stain, oxidation layer and water from being formed on the welding position area and the welding rod and to expose metallic luster;
1.3), welding technical requirements: the overlaying layer fuses base materials, and a welding seam cannot have any welding defects;
1.4), weldment material: high alloy steel;
1.5), auxiliary facilities: the device comprises a heat-insulating barrel, a sample plate, a temperature measuring instrument, a magnifier, a mask, gloves, a slag removing hammer, a chisel, a file, a steel brush, abrasive paper, a steel ruler, a horizontal ruler, a movable spanner, a straight grinder, an angle grinder, a wire pliers, a steel saw blade and labor protection articles;
1.6), welding process parameters: setting welding parameters according to welding equipment, welding materials, weldment materials and welding requirements;
step two, welding is carried out;
2.1) before welding, adopting a film to protect a non-welding area, preheating a weldment by adopting a heating belt, laying a layer of asbestos cloth on the preheating area, then placing the heating belt for heating, wrapping heat preservation cotton outside the heating belt, placing a thermocouple between the crankshaft and the asbestos cloth for measuring temperature, and carrying out auxiliary measurement and control by an infrared thermometer, wherein the preheating temperature is set at 200-plus-one-time temperature of 250 ℃, and the uniform temperature rise is ensured during preheating at 30 ℃/h;
2.2) because of the welding repair of the large-scale crank shaft, the deformation of the crank shaft in the welding process needs to be controlled, and the welding area is welded in all positions;
2.3) keeping the interlayer temperature in the welding process and properly hammering to reduce the stress action due to the large and long groove depth;
2.4), process monitoring: erecting dial indicators at two ends of the crankshaft to monitor the micro-variable of the crankshaft in the welding process so as to adjust the welding sequence in time;
2.5) welding is carried out in sequence by adopting a bottom layer, a filling layer and a cover layer, and no welding defect is ensured to be detected layer by layer;
2.6), carrying out welding heat treatment at 650 ℃ after welding is finished;
2.7) flaw detection is carried out on the welding seam shaft by adopting nondestructive testing, the surface adopts fluorescence testing, and the interior adopts ultrasonic testing;
2.8) after determining that the welding is flawless, manually grinding the welding position until the concentricity is less than or equal to 0.02mm, polishing the welding position until the residual quantity is less than 0.02mm until the welding position meets the use size, and delivering for use after the welding position completely meets the process requirements through the operation inspection and acceptance of the on-site high-pressure water pump.
As a further improvement of the technical scheme, the left bevel face and the right bevel face are single faces of grooves machined to 35 degrees.
As a further improvement of the technical scheme, the bottom layer adopts an E7015 welding rod with the diameter of phi 3.2mm, the welding current is 90-120A, the arc voltage is 17 +/-1V, and the welding speed is 15 +/-1 cm/min; the filling layer and the cover surface layer adopt E7015 welding rods with phi of 4.0mm, the welding current is 140-180A, the arc voltage is 19 +/-1V, and the welding speed is 15 +/-1 cm/min.
Compared with the prior art, cracked welding set of the large-scale bent axle of the high-pressure pump body, its novel in design is reasonable, the structure is succinct, the preparation is convenient, easy operation is practical, the butt joint about the large-scale bent axle of the high-pressure pump body that can be fine satisfies fracture, through this welding set and the corresponding repair technology of cooperation, not only safe easy operation, welding quality is stable, the investment cost is low, on-the-spot actual demand has been satisfied, work efficiency is high, and greatly reduced cost of maintenance, long-time process shutdown loss has been reduced, provide effective guarantee for reasonable group's product, and this cracked welding set of the large-scale bent axle of the high-pressure pump body and repair technology provide the scientific reference foundation for the welding restoration of various large-scale alloy steel spare parts from now on.
Drawings
Fig. 1 is a schematic structural view of a welding device for fracture of a large crankshaft of a high-pressure pump body according to the present invention;
FIG. 2 is a schematic structural view of a bottom plate of the middle-structure tooling of the present invention;
fig. 3 is a schematic structural view of the left clamping fixing frame of the present invention;
fig. 4 is a schematic structural view of the middle-right clamping fixing frame of the present invention;
FIG. 5 is a schematic view of a crankshaft disposed on a welding device for a large crankshaft fracture of a high pressure pump body;
FIG. 6 is a schematic top view of a crankshaft disposed on a welding device for a large crankshaft fracture of a high pressure pump body;
FIG. 7 is an exploded view of the welding device for breaking the large crankshaft of the high-pressure pump body according to the present invention;
in the figure: 1. a structural member tooling bottom plate; 101. a chute; 2. a left bracket; 3. a right bracket; 31. a sliding bottom plate; 4. a crankshaft; 41. a crankshaft left portion; 42. a crankshaft right portion; 4A, a left bevel face; 4B, a right bevel face; 5. a left clamping mount; 51. a left cylindrical connection portion; 52. a left clamping fixing frame clamping part; 6. a right clamping fixing frame; 61. a right tubular connecting portion; 62. a right clamping fixing frame clamping part; 7. a first clamping bolt; 8. a second clamping bolt; 9. a right bracket reinforcing plate; 10. a left bracket reinforcing plate; 11. a left bracket rotating shaft; 12. the left bracket rotates the nut; 13. the left bracket adjusts the threaded guide rod; 14. a first fixing pin; 15. a right bracket rotating shaft; 16. the right bracket rotates the nut; 17. the right bracket adjusts the threaded guide rod; 18. a second fixing pin; 19. a right bracket adjusting bolt; 20. a left mount adjustment device; 30. a right mount adjustment device; 70. a right bracket adjustment device; 71. and (7) fixing the plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "upper", "lower", "left", "right", "front", "rear", and the like used in the specification and claims of the present disclosure are used only to indicate relative positional relationships, and when the absolute position of a described object is changed, the relative positional relationships are changed accordingly.
Example 1:
as shown in the figure, the broken crankshaft 4 can be divided into a left crankshaft part 41 and a right crankshaft part 42, and the broken parts are difficult to control by assembling and welding at all positions because the shape of the crankshaft body is irregular. In order to solve the problem of assembly and all-position welding of the broken part of a crankshaft 4 to be repaired, the utility model relates to a welding device for the breakage of a large crankshaft of a high-pressure pump body, which comprises a structural part tool bottom plate 1 formed by cutting a steel plate with the thickness of 100mm, wherein one side of the structural part tool bottom plate 1 is fixedly provided with a left bracket 2, the other side is slidably provided with a right bracket 3, and a right bracket adjusting device 70 is arranged between the right bracket 3 and the structural part tool bottom plate 1; the left bracket 2 and the right bracket 3 are respectively provided with a left clamping fixing frame 5 and a right clamping fixing frame 6 in a rotatable way; a left fixing frame adjusting device 20 is movably arranged between the left clamping fixing frame 5 and the left support 2, and a right fixing frame adjusting device 30 is movably arranged between the right clamping fixing frame 6 and the right support 3. In the embodiment, the left bracket 2 and the right bracket 3 are both machined by steel plates with the thickness of 80mm, and are used for stably supporting all components arranged on the left bracket and the right bracket and placing crankshafts on the left bracket and the right bracket for welding repair; the left clamping fixing frame 5 and the right clamping fixing frame 6 are machined by steel with the thickness of 50mm and are used for clamping a large crankshaft to be repaired, so that the crankshaft fracture part can be conveniently butted; the right bracket adjusting device 70 is used for adjusting the left and right positions of the right bracket 3, so that the left and right gaps of the broken crankshaft at the butt joint part can be conveniently adjusted; the left fixing frame adjusting device 20 and the right fixing frame adjusting device 30 are used for accurately butting the bevel face of the broken crankshaft at the broken position to meet the welding requirement.
In this embodiment, the front and rear edges of the upper surface of one side of the sliding connection between the structural component tooling bottom plate 1 and the right bracket 3 are correspondingly provided with sliding grooves 101, the sliding grooves 101 can be realized by correspondingly arranging "L" -shaped steel plates at the front and rear edges of the upper surface of the structural component tooling bottom plate 1 and forming grooves between the steel plates and the structural component tooling bottom plate 1, the bottom of the right bracket 3 is vertically welded and fixed with a sliding bottom plate 31, and the front and rear sides of the sliding bottom plate 31 are respectively arranged in the sliding grooves 101. Through the setting of this structure, the horizontal slip adjustment of right branch frame 3 of being convenient for, secondly also form limit function to right branch frame 3 through spout 101, ensure its steadiness.
In this embodiment, further, the right bracket adjusting device 70 includes a fixing plate 71 fixedly welded to the upper surface of the structural component tooling bottom plate 1, the fixing plate 71 is provided with a threaded hole corresponding to the lower portion of the right bracket 3 and is connected to the right bracket by providing the right bracket adjusting bolt 19, and the right bracket 3 is driven to slide left and right by the rotation of the right bracket adjusting bolt 19.
For promoting the steadiness of left socle 2 and right branch frame 3, in this embodiment, the welding is provided with a plurality of left socle gusset plates 10 between left socle 2 and the structure frock bottom plate 1, the welding is provided with a plurality of right branch frame gusset plates 9 between right branch frame 3 and the sliding bottom plate 31.
In order to facilitate the placement of a crankshaft to be welded and repaired on the welding device, a through hole is formed in the upper portion of the left support 2, a left cylindrical connecting portion 51 matched with the through hole in the left support 2 is arranged on one side of the left clamping fixing frame 5 and can be rotatably arranged in the through hole, a U-shaped left clamping fixing frame clamping portion 52 is arranged on the other side of the left clamping fixing frame 5, and first clamping bolts 7 are correspondingly arranged at two end portions of the left clamping fixing frame clamping portion 52 respectively; in this example, the left cylindrical connecting portion 51 of the left clamping fixing frame 5 is used for placing the end portion of the left portion 41 of the broken crankshaft to be repaired, and the left clamping fixing frame clamping portion 52 on the other side is matched with the first clamping bolt 7 for clamping the rest portion of the left portion 41 of the crankshaft, so that the left portion 41 of the crankshaft is firmly fixed on the left clamping fixing frame 5; meanwhile, the left cylindrical connecting part 51 can freely rotate relative to the left bracket 2, so that the left clamping fixing frame clamping part 52 of the left cylindrical connecting part is driven to rotate, and the assembly requirement of the broken crankshaft to be repaired is facilitated; similarly, the right bracket 3 is also provided with a similar structure, the upper part of the right bracket 3 is provided with a through hole, one side of the right clamping fixing frame 6 is provided with a right cylindrical connecting part 61 matched with the through hole on the right bracket 3 and rotatably arranged in the through hole, the other side of the right clamping fixing frame is provided with a U-shaped right clamping fixing frame clamping part 62, and two end parts of the right clamping fixing frame clamping part 62 are respectively and correspondingly provided with a second clamping bolt 8; in this example, the right cylindrical connecting portion 61 of the right clamping fixing frame 6 is used for placing the end portion of the right crankshaft portion 42 of the broken crankshaft to be repaired, and the right clamping fixing frame clamping portion 62 on the other side is matched with the second clamping bolt 8 to clamp the rest portion of the right crankshaft portion 42, so that the right crankshaft portion 42 is firmly fixed on the right clamping fixing frame 6; meanwhile, the right cylindrical connecting portion 61 can rotate freely relative to the right bracket 2, so as to drive the right clamping fixing frame clamping portion 62 to rotate, and the right cylindrical connecting portion and the left clamping fixing frame clamping portion 52 complete assembly requirements of the broken crankshaft to be repaired together. In this example, the precise rotational adjustment of the left clamping fixture clamping portion 52 and the right clamping fixture clamping portion 62 is performed by the left fixture adjusting device 20 movably disposed between the left clamping fixture 5 and the left bracket 2 and the right fixture adjusting device 30 movably disposed between the right clamping fixture 6 and the right bracket 3.
Further, the left fixing frame adjusting device 20 comprises a left support rotating shaft 11 with one end rotatably connected with the lower part of the left support 2, a left support rotating nut 12 is vertically and rotatably arranged at the other end of the left support rotating shaft 11, the left support rotating nut 12 is in threaded connection with a left support adjusting threaded guide rod 13, and the other end of the left support adjusting threaded guide rod 13 is movably connected with one side of the left clamping fixing frame clamping part 52 through a first fixing pin 14; the right fixing frame adjusting device 30 comprises a right support rotating shaft 15 with one end rotatably connected with the lower portion of the right support 3, the other end of the right support rotating shaft 15 is vertically and rotatably provided with a right support rotating nut 16, the right support rotating nut 16 is in threaded connection with a right support adjusting threaded guide rod 17, and the other end of the right support adjusting threaded guide rod 17 is movably connected with one side of the right clamping fixing frame clamping portion 62 through a second fixing pin 18. When the left bracket adjusting screw thread guide rod is used, the left bracket rotating nut 12 is rotated, so that the left bracket adjusting screw thread guide rod 13 in threaded connection can move upwards or downwards, the other end of the left bracket adjusting screw thread guide rod 13 is movably connected with one side of the left clamping fixing frame clamping part 52 through the first fixing pin 14, and the left bracket adjusting screw thread guide rod 13 drives the left clamping fixing frame clamping part 52 to rotate clockwise or anticlockwise for adjustment when moving upwards or downwards; similarly, the adjustment of the right clamping fixture clamping portion 62 by the right fixture adjusting device 30 is consistent with the left adjustment; through the adjustment mode, the broken part of the broken crankshaft to be repaired can be accurately assembled, so that the repairing requirement is facilitated.
Example 2:
as shown in the attached drawings, the utility model relates to a repair process for the fracture of a large-scale crankshaft of a high-pressure pump body, the fractured crankshaft 4 is divided into a crankshaft left part 41 and a crankshaft right part 42, a left bevel face 4A and a right bevel face 4B for butt joint repair are respectively arranged at the fracture positions to be repaired of the crankshaft left part 41 and the crankshaft right part 42, the left bevel face 4A and the right bevel face 4B are machined into single faces 35 degrees, then the fracture welding device of the large-scale crankshaft of the high-pressure pump body is used for repairing, the crankshaft left part 41 and the crankshaft right part 42 are respectively fixed on a left clamping fixing frame 5 and a right clamping fixing frame 6, the distance between the crankshaft left part 41 and the crankshaft right part 42 is adjusted through a right bracket adjusting device 70, so that the left bevel face 4A and the right bevel face 4B reach the gap requirement of welding repair, the angles of the left clamping fixing frame 5 and the right clamping fixing frame 6 are respectively adjusted through a left fixing frame adjusting device 20 and a right fixing frame adjusting device 30, so that the left bevel face 4A and the right bevel face 4B meet the butt joint requirement of welding repair, and the welding process comprises the following steps:
step one, preparing before welding;
1.1, welding equipment: HT400D digital control inversion type manual direct current argon arc welding machine adopts E7015 welding rod, direct current is connected reversely;
1.2, cleaning before welding: cleaning the welding position before welding to prevent oil stain, oxidation layer and water from being formed on the welding position area and the welding rod and to expose metallic luster;
1.3, welding technical requirements: the overlaying layer fuses base materials, and a welding seam cannot have any welding defects;
1.4, weldment material: high alloy steel;
1.5, auxiliary facilities: the device comprises a heat-insulating barrel, a sample plate, a temperature measuring instrument, a magnifier, a mask, gloves, a slag removing hammer, a chisel, a file, a steel brush, abrasive paper, a steel ruler, a horizontal ruler, a movable spanner, a straight grinder, an angle grinder, a wire pliers, a steel saw blade and labor protection articles;
1.6, welding process parameters:
manual shielded metal arc welding
Step two, welding is carried out;
2.1, before welding, a film is adopted to protect a non-welding area, a heating belt is adopted for preheating a weldment, a layer of asbestos cloth is laid on the preheating area, then the heating belt is placed for heating, heat preservation cotton is wrapped outside the heating belt, a thermocouple is placed between a crankshaft and the asbestos cloth for measuring temperature, and the thermocouple is used for measuring and controlling the temperature by an infrared thermometer in an auxiliary mode, the preheating temperature is set to be 200-plus-250 ℃, and the temperature is ensured to be uniformly raised by 30 ℃/h during preheating;
2.2, because of the welding repair of the large-scale crankshaft, the deformation of the crankshaft in the welding process needs to be controlled, and all-position welding is adopted for a welding area;
2.3, because the groove depth is large and long, the interlayer temperature is kept in the welding process and proper hammering is carried out to reduce the stress action;
2.4, process monitoring: erecting dial indicators at two ends of the crankshaft to monitor the micro-variable of the crankshaft in the welding process so as to adjust the welding sequence in time;
2.5, welding is carried out in sequence by adopting a bottom layer, a filling layer and a cover layer, and no welding defect is ensured to be detected layer by layer;
2.6, performing welding heat treatment at 650 ℃ after welding is finished;
2.7, flaw detection is carried out on the welding seam shaft by adopting nondestructive testing, the surface is detected by adopting fluorescence, and the interior is detected by adopting ultrasonic waves;
2.8, after determining that the welding is free of defects, manually grinding the welding position until the concentricity is less than or equal to 0.02mm, polishing the welding position until the residual quantity is less than 0.02mm until the welding position meets the use size, and delivering for use after the welding position completely meets the process requirements through the operation inspection and acceptance of the on-site high-pressure water pump.
Claims (7)
1. A welding device for breakage of a large crankshaft of a high-pressure pump body is characterized by comprising a structural part tool bottom plate (1), wherein a left support (2) is fixedly arranged on one side of the structural part tool bottom plate (1), a right support (3) is arranged on the other side of the structural part tool bottom plate in a sliding mode, and a right support adjusting device (70) is arranged between the right support (3) and the structural part tool bottom plate (1); the left bracket (2) and the right bracket (3) are respectively provided with a left clamping fixing frame (5) and a right clamping fixing frame (6) in a rotatable way; a left fixing frame adjusting device (20) is movably arranged between the left clamping fixing frame (5) and the left support (2), and a right fixing frame adjusting device (30) is movably arranged between the right clamping fixing frame (6) and the right support (3).
2. The welding device for the breakage of the large crankshaft of the high-pressure pump body according to claim 1, wherein sliding grooves (101) are correspondingly formed in the front edge and the rear edge of one side, in sliding connection with the right support (3), of the structural part tooling bottom plate (1), a sliding bottom plate (31) is fixedly arranged at the bottom of the right support (3), and the sliding bottom plate (31) is placed in the sliding grooves (101).
3. The welding device for the breakage of the large crankshaft of the high-pressure pump body according to claim 1 or 2, characterized in that the right bracket adjusting device (70) comprises a fixing plate (71) fixedly arranged on the upper surface of the structural part tooling bottom plate (1), and the fixing plate (71) is provided with a threaded hole corresponding to the lower part of the right bracket (3) and is connected with the right bracket adjusting bolt (19).
4. The welding device for the breakage of the large crankshaft of the high-pressure pump body according to claim 3, characterized in that a plurality of left support reinforcing plates (10) are welded between the left support (2) and the structural member tooling bottom plate (1), and a plurality of right support reinforcing plates (9) are welded between the right support (3) and the sliding bottom plate (31).
5. The welding device for the fracture of the large crankshaft of the high-pressure pump body according to claim 4, wherein a through hole is formed in the upper portion of the left support (2), a left cylindrical connecting portion (51) matched with the through hole in the left support (2) is arranged on one side of the left clamping fixing frame (5) and rotatably arranged in the through hole, a U-shaped left clamping fixing frame clamping portion (52) is arranged on the other side of the left clamping fixing frame (5), and first clamping bolts (7) are correspondingly arranged at two end portions of the left clamping fixing frame clamping portion (52) respectively; the upper portion of right branch frame (3) has seted up the through-hole, the one side that right side pressed from both sides tight mount (6) is provided with right tube-shape connecting portion (61) with through-hole looks adaptation on right branch frame (3) and rotatable the setting in this through-hole, and its opposite side is provided with the right side of "U" shape and presss from both sides tight mount clamping part (62), and two tip that this right side pressed from both sides tight mount clamping part (62) are corresponding respectively to be provided with second clamping bolt (8).
6. The welding device for the fracture of the large crankshaft of the high-pressure pump body according to claim 5, wherein the left fixing frame adjusting device (20) comprises a left support rotating shaft (11) with one end rotatably connected with the lower portion of the left support (2), a left support rotating nut (12) is vertically and rotatably arranged at the other end of the left support rotating shaft (11), a left support adjusting threaded guide rod (13) is in threaded connection with the left support rotating nut (12), and the other end of the left support adjusting threaded guide rod (13) is movably connected with one side of the left clamping fixing frame clamping portion (52) through a first fixing pin (14).
7. The welding device for the breakage of the large crankshaft of the high-pressure pump body according to claim 5 or 6, wherein the right fixing frame adjusting device (30) comprises a right support rotating shaft (15) with one end rotatably connected with the lower portion of the right support (3), the other end of the right support rotating shaft (15) is vertically and rotatably provided with a right support rotating nut (16), the right support rotating nut (16) is in threaded connection with a right support adjusting threaded guide rod (17), and the other end of the right support adjusting threaded guide rod (17) is movably connected with one side of the right clamping fixing frame clamping portion (62) through a second fixing pin (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121342985.8U CN214769577U (en) | 2021-06-16 | 2021-06-16 | Welding device for fracture of large crankshaft of high-pressure pump body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121342985.8U CN214769577U (en) | 2021-06-16 | 2021-06-16 | Welding device for fracture of large crankshaft of high-pressure pump body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214769577U true CN214769577U (en) | 2021-11-19 |
Family
ID=78713055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121342985.8U Active CN214769577U (en) | 2021-06-16 | 2021-06-16 | Welding device for fracture of large crankshaft of high-pressure pump body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214769577U (en) |
-
2021
- 2021-06-16 CN CN202121342985.8U patent/CN214769577U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113210801A (en) | Welding device and repairing process for large crankshaft fracture of high-pressure pump body | |
| CN105689857A (en) | Tower drum manufacturing welding process | |
| CN201985705U (en) | Laser welding device | |
| CN112935686B (en) | Welding repair process for breakage of large inclined roll shaft of ring rolling mill | |
| CN107803583A (en) | A kind of drawing type inertia friction weld method and device | |
| CN105665898A (en) | Automatic submerged arc welding method for pearlitic heat-resistant steel composite board | |
| CN112958881A (en) | Manual welding device and welding process for cracking of suspension type gear reducer box body | |
| CN102259231A (en) | Overhead wielding technology for rotary kiln cylinder | |
| CN214769577U (en) | Welding device for fracture of large crankshaft of high-pressure pump body | |
| CN113182646A (en) | Surfacing device and repairing process for abrasion of large vertical shaft end of finishing mill | |
| CN214417990U (en) | Internal welding equipment for tower barrel machining | |
| CN217071099U (en) | Welding heating device for wear surface of wheel machining machine tool base | |
| CN111250824B (en) | Repairing process for inner hole wear surface of upper beam of large hydraulic press | |
| CN219005059U (en) | Multi-angle welding equipment for sheet metal parts | |
| CN217394001U (en) | Simple welding device for cracking of large-scale high-voltage motor base lug | |
| CN114603235B (en) | Welding repair device and welding repair method for wheel bevel gear fracture | |
| CN214350629U (en) | Manual welding set of suspension type gear reduction box fracture | |
| CN215238459U (en) | Cracked welding device for base of large wheel fixing table | |
| CN211866829U (en) | Welding device for heat-resistant steel base of slow cooling wheel | |
| CN112846456A (en) | Online welding device and welding process for fatigue cracks of large ball mill shaft neck | |
| CN210388012U (en) | Welding device for large aluminum forging alloy lifting appliance of high-speed wheel | |
| CN214769578U (en) | Large-scale vertical scroll end wearing and tearing build-up welding device of finishing mill | |
| CN104152896B (en) | Weld fillet surface modification method and device under combined action of nano repairing particles and laser shock strengthening | |
| CN112935472A (en) | Wheel dephosphorization electric reciprocating pump body water tank crack welding device and repair process | |
| CN218726879U (en) | Metal pipe circumferential nondestructive flaw detector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |