CN113182645A - Large-scale black gold bearing bush surface welding repair device and repair process - Google Patents

Abstract

The invention discloses a large-scale black gold bearing bush surface welding device, which comprises a rotating frame base and a rotating bracket which is rotatably arranged on the rotating frame base; the rotary support comprises two wheel bodies which are arranged in a bilateral symmetry mode, a half-moon-shaped frame is connected and arranged between the two wheel bodies, and the front end and the rear end of the half-moon-shaped frame are symmetrically provided with bearing bush anti-falling devices respectively. The method mainly aims at the defects that the wear, the falling and the local cracking of the wujin layer of the existing large-scale wujin bearing bush are not easy to repair, and after the method is applied, various problems on the surface of the wujin bearing bush can be repaired by welding, so that the purchasing cost is reduced, the long-time process shutdown loss is reduced, and the guarantee is provided for reasonable production.

Description

Large-scale black gold bearing bush surface welding repair device and repair process

Technical Field

The invention belongs to the technical field of welding, and relates to a large-scale black gold bearing bush surface welding repair device and a repair process.

Background

The wheel band rolling mill is used for rolling wheel band flange, its main driving system is formed from main motor, main speed reducer, main driving shaft, bevel gear and large and small spur gears, and can be used for respectively driving main roller vertical shaft and horizontal roller to make them rotate, in which the small spur gear is mounted on the main driving shaft, and its meshed large spur gear is mounted on the horizontal roller shaft, and a pair of mutually-meshed large and small spur gears can be used for matching rotating speed and transferring torque when the wheel band rolling mill is worked. The large main drive shaft of the core is fixed through infrastructure, is matched and installed on the black gold bearing bush to operate, and operates under the action of load for a long time and conveying oil pipes are unsmooth along with the increase of the working time of the wheel band rolling mill, so that abrasion, local cracking and falling of a black gold layer 32 (shown in figure 4) on the surface of the black gold bearing bush of the large main drive shaft which operates in a matching mode are caused, the operation precision of a shaft system is influenced, and larger vibration and noise are generated when the wheel band rolling mill operates.

If the black gold bearing bush is completely and integrally replaced, a large amount of spare part cost is required, an enterprise generally does not have new spare parts, the period for purchasing and processing the new spare parts is long, and production is influenced. In order to recover production as soon as possible, a simple surface welding repair device of the black-gold bearing bush needs to be designed, a repair process based on base metal alloy needs to be formulated and perfected, the large-scale welding repair of the black-gold bearing bush surface defects is carried out, and the large-scale black-gold bearing bush with the surface defects can be reused economically, safely and reliably. In addition, the main difficulty of welding and repairing the surface of the large-scale black gold bearing bush is as follows: 1. because the melting point of the black-gold body is low and the gas welding operation molten pool is difficult to control, the repair of any defect on the surface of the black-gold bearing bush must be in a horizontal position for welding. 2. Because the black-gold bearing bush is a composite layer and is divided into a base material and a black-gold layer, the black-gold bearing bush is integrally cast by adopting the original process, and the fallen black-gold is firmly fused on the base material at present, so that the black-gold is difficult to be combined with the base material by directly performing repair welding on the black-gold.

Disclosure of Invention

Aiming at the defects that the wear, the falling and the local cracking of the wujin layer of the large-scale wujin bearing bush are not easy to repair in the background technology, the invention provides the surface welding repair device and the repair process of the large-scale wujin bearing bush, which can carry out welding repair on various problems on the surface of the wujin bearing bush, reduce the purchase cost, reduce the long-time process shutdown loss and provide guarantee for reasonable production.

The technical scheme for solving the technical problem of the invention is as follows:

the invention relates to a large-scale black gold bearing bush surface welding device, which comprises a rotating frame base and a rotating bracket which is rotatably arranged on the rotating frame base; the rotary support comprises two wheel bodies which are arranged in a bilateral symmetry mode, a half-moon-shaped frame is connected and arranged between the two wheel bodies, and the front end and the rear end of the half-moon-shaped frame are symmetrically provided with bearing bush anti-falling devices respectively.

Further, the rotating frame base comprises a base frame, arc-shaped wheel seats are symmetrically arranged at the tops of two sides of the base frame respectively, and arc-shaped grooves are formed in the inner sides of the arc-shaped wheel seats respectively; two wheel bodies of the rotating support correspond to the two arc-shaped wheel seats respectively, an annular bulge matched with the arc-shaped groove is arranged on the outer side of each wheel body, and each annular bulge is arranged in the corresponding arc-shaped groove.

Furthermore, a rotary crank is arranged on the outer side of one of the wheel bodies.

Furthermore, axle bush dropout prevention means is including fixed the dropout prevention base that sets up on half moon frame, has evenly seted up a plurality of locking screw on this dropout prevention base, is provided with locking screw in every locking screw.

The invention relates to a surface repair welding repair repairing process of a large-scale black gold bearing bush, which comprises a base material and a black gold layer arranged on the outer side of the base material, wherein the repair welding repairing device is used for performing repair welding repair repairing on the abrasion, local cracking and falling positions of the black gold layer of the black gold bearing bush through the technical scheme and comprises the following steps:

firstly, preparing welding;

1.1), welding equipment: HT400D digital control inversion type manual direct current argon arc welding machine, direct current is reversely connected, and welding materials adopt aluminum bronze welding rods; oxygen-acetylene gas welding, wherein the welding material adopts Babbitt alloy;

1.2), oil stains, oxide layers, moisture and the like cannot be generated in a welding position area and a welding material, and metallic luster needs to be exposed;

1.3), welding technical requirements: the base material and the red copper combined nail are firm, the overlaying layer is fused with the base material, and the welding seam cannot have any welding defects;

1.4), weldment material: base material 35#, babbitt;

1.5), welding position: horizontally welding, and adjusting through a rotating bracket;

1.6), 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;

1.7), welding process parameters: determining welding parameters according to welding equipment, welding wire specifications and welding requirements;

secondly, welding and repairing;

2.1), placing the black gold bearing bush to be repaired in the half-moon-shaped frame of the large-scale black gold bearing bush surface welding device, and locking the black gold bearing bush by the bearing bush anti-falling device;

2.2) repairing the worn position of the black gold layer by welding; before welding, a manual straight grinding machine is adopted to grind the worn position and clean the surface of the grinded black gold layer, so as to ensure no oil stain; then, matching manual oxy-acetylene gas welding with a Babbitt metal welding wire with the diameter of 3.0mm, wherein a welding gun is H01-300 type, a flame core is carbonized flame, firstly, filling and surfacing welding of a bottom layer is carried out by using a welding nozzle No. 01, and then, welding repair of a cover layer is carried out by using a welding nozzle No. 03; after the welding and surfacing of the worn part is finished, directly knocking the surface by a small hammer and enabling the surface to be fully covered with pits, wherein the lowest point of each pit is higher than the surface of the black gold layer, and enough margin is reserved for facilitating processing;

2.3) repairing and welding the local shedding position of the black gold layer; firstly, manufacturing a plurality of red copper binding nails according to the thickness of the black gold layer and the area of the local falling position of the black gold layer, wherein the red copper binding nails are made of red copper and are in cylindrical structures, and the height of the red copper binding nails does not exceed the thickness of the black gold layer; before welding, grinding the irregular black gold layer by a manual straight grinding machine, grinding the base material at the position where the black gold layer falls into a square or round shape according to different falling shapes, and then cleaning the welding position to ensure that no oil stain exists; welding red copper binding nails on a base material at the position where the wu-gold layer falls off in a segmented sequencing manner by manual welding rod arc welding, ensuring that enough space is filled between the red copper binding nails to fill the wu-gold, inspecting a welding line through visual inspection and a magnifying glass of 5 times after welding is finished, applying a hammer to knock to judge whether the strength is met, and after firm connection is confirmed, polishing each welded red copper binding nail into a coarse shape with a pointed upper head and a thick lower head by a manual straight grinding machine to meet the binding strength and facilitate fusion of the wu-gold layer; then, matching manual oxy-acetylene gas welding with a Babbitt metal welding wire with the diameter of 3.0mm, wherein a welding gun is H01-300 type, a flame core is carbonized flame, firstly, filling and surfacing welding of a bottom layer is carried out by using a welding nozzle No. 01, and then, welding repair of a cover layer is carried out by using a welding nozzle No. 03; after the welding and surfacing of the worn part is finished, directly knocking the surface by a small hammer and enabling the surface to be fully covered with pits, wherein the lowest point of each pit is higher than the surface of the black gold layer, and enough margin is reserved for facilitating processing;

2.4) welding repair of local cracking positions of the black gold layer; before welding, a manual angle grinder is adopted to cut the cracks and then process the cracks into V-shaped or U-shaped grooves, and then the positions of welding repair are cleaned to ensure that no oil stains exist; then, matching manual oxy-acetylene gas welding with a Babbitt metal welding wire with the diameter of 3.0mm, wherein a welding gun is H01-300 type, a flame core is carbonized flame, firstly, filling and surfacing welding of a bottom layer is carried out by using a welding nozzle No. 01, and then, welding repair of a cover layer is carried out by using a welding nozzle No. 03; after the welding and surfacing of the worn part is finished, directly knocking the surface by a small hammer and enabling the surface to be fully covered with pits, wherein the lowest point of each pit is higher than the surface of the black gold layer, and enough margin is reserved for facilitating processing;

2.5) after all welding is finished and no defect is detected, manually grinding the welding supplement position, processing the welding supplement position to be in accordance with the use size, and carrying out rolling inspection and acceptance through a field physical die, and delivering for use after the welding supplement position is in accordance with the process requirements completely.

Compared with the prior art, the large-scale black gold bearing bush surface welding repair device is novel and reasonable in design, simple in structure, convenient to manufacture, simple and practical to operate, can be used for effectively repairing the falling, local abrasion and cracking of a large-scale alloy bearing bush by matching with a corresponding repair process, reduces purchasing cost, reduces long-time process shutdown loss, and provides guarantee for reasonable production.

Drawings

FIG. 1 is a schematic structural view of a large-scale gold bearing shell surface welding device according to the present invention;

FIG. 2 is a schematic structural view of a base of the swivel mount of the present invention;

FIG. 3 is a schematic view of the structure of the rotating bracket of the present invention;

FIG. 4 is a schematic structural diagram of a bearing shell of black gold in the present invention;

in the figure: 1. a rotating frame base; 11. a base frame; 12. an arc-shaped wheel seat; 13. an arc-shaped groove; 2. rotating the bracket; 21. a wheel body; 22. an annular projection; 23. a half-moon shaped frame; 24. an anti-drop base; 25. locking the screw hole; 26. locking the screw rod; 3. a black gold bearing bush; 31. a substrate; 32. a black gold layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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 fig. 1 to 4, the surface welding device for a large-scale gold bearing shell of the present invention comprises a rotating frame base 1 and a rotating bracket 2 rotatably disposed on the rotating frame base 1, wherein the rotating frame base 1 is manufactured by cutting and blanking channel steel of 120 mm; the rotating bracket 2 comprises two wheel bodies 21 which are arranged in a bilateral symmetry mode, a half-moon-shaped frame 23 is connected between the two wheel bodies 21, the half-moon-shaped frame 23 is matched with the black gold bearing bush 3 to be placed in the half-moon-shaped frame, and bearing bush anti-falling devices are symmetrically arranged at the front end and the rear end of the half-moon-shaped frame respectively and are used for locking the black gold bearing bush 3 after the black gold bearing bush is placed in the half-moon-shaped frame 23.

In this embodiment, in order to facilitate the rotation of the rotating bracket 2 on the rotating frame base 1, the rotating frame base 1 includes a base frame 11, arc-shaped wheel seats 12 are symmetrically arranged at the tops of two sides of the base frame 11, respectively, and an arc-shaped groove 13 is arranged on the inner side of each arc-shaped wheel seat 12; the two wheel bodies 21 of the rotating bracket 2 correspond to the two arc-shaped wheel seats 12 respectively, the outer side of each wheel body 21 is provided with an annular bulge 22 matched with the arc-shaped groove 13, and each annular bulge 22 is arranged in one corresponding arc-shaped groove 13. Further, a rotation handle 27 is provided on an outer side of one of the wheel bodies 21, and the rotation bracket 2 can be easily rotated by the rotation handle 27.

In this embodiment, the axle bush anti-drop device includes an anti-drop base 24 fixedly disposed on the half-moon shaped frame 23, a plurality of locking screw holes 25 are uniformly disposed on the anti-drop base 24, a locking screw 26 is disposed in each locking screw hole 25, and after the bearing bush 3 is placed, both ends of the bearing bush are respectively fixed by the locking bolts 26.

Example 2:

the invention relates to a surface repair welding repair repairing process of a large-scale black-gold bearing bush, wherein the black-gold bearing bush 3 comprises a base material 31 and a black-gold layer 32 arranged on the outer side of the base material 31, the problems of abrasion, local cracking and falling off can occur after the black-gold layer 32 is operated for a long time, the abrasion, local cracking and falling off positions of the black-gold layer 32 of the black-gold bearing bush 3 are repaired by welding repair through a large-scale black-gold bearing bush surface repair welding repair device in embodiment 1, and the steps are as follows:

firstly, preparing welding;

1.1, welding equipment: HT400D digital control inversion type manual direct current argon arc welding machine, direct current is reversely connected, and welding materials adopt aluminum bronze welding rods; oxygen-acetylene gas welding, wherein the welding material adopts Babbitt alloy;

1.2, oil stains, oxide layers, moisture and the like do not exist in a welding position area and a welding material, and the metallic luster needs to be exposed;

1.3, welding technical requirements: the base material and the red copper combined nail are firm, the overlaying layer is fused with the base material, and the welding seam cannot have any welding defects;

1.4, weldment material: base material 35#, babbitt;

1.5, welding position: horizontal welding, because the melting point of the black gold body is low, when gas welding is adopted, the molten pool is difficult to control, so any defect on the surface of the black gold bearing bush must be in horizontal position welding, and during normal welding, left and right rotation adjustment can be carried out through the rotating crank 26 of the rotating bracket 2;

1.6, 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;

1.7, welding process parameters:

manual shielded metal arc welding

Manual oxygen-acetylene gas welding

Type of welding wire	Welding layer	Diameter of welding wire/mm	Welding tip	Flame core	Welding gun
						Babbitt metal	Filling layer	Φ3.0mm	01#	Carbonization flame	H01-30
Babbitt metal	Cover layer	Φ3.0mm	03#	Carbonization flame	H01-30

Secondly, welding and repairing;

2.1, placing the black gold bearing bush 3 to be repaired in the half-moon-shaped frame 23 of the large-scale black gold bearing bush surface welding device, and locking the frame by a locking screw 26 of the bearing bush anti-falling device;

2.2, repairing and welding the worn position of the wu-gold layer 23; before welding, a manual straight grinding machine is adopted to grind the abrasion position, and the surface of the grinded black gold layer 23 is cleaned, so that no oil stain is ensured; then, matching manual oxy-acetylene gas welding with a Babbitt metal welding wire with the diameter of 3.0mm, wherein a welding gun is H01-300 type, a flame core is carbonized flame, firstly, filling and surfacing welding of a bottom layer is carried out by using a welding nozzle No. 01, and then, welding repair of a cover layer is carried out by using a welding nozzle No. 03; after the welding and surfacing of the worn part is finished, directly knocking the surface by a small hammer and enabling the surface to be fully covered with pits, wherein the lowest point of each pit is higher than the surface of the black gold layer 32, and enough margin is reserved for facilitating processing;

2.3, repairing and welding the local falling position of the wu-gold layer 32; firstly, manufacturing a plurality of red copper bonding nails according to the thickness of the black gold layer 32 and the area of the local falling position of the black gold layer 32, wherein the red copper bonding nails are made of red copper and are in cylindrical structures, and the height of the red copper bonding nails does not exceed the thickness of the black gold layer 32; before welding, a manual straight grinding machine is adopted to grind the irregular gold-coated layer 32, the base material 31 at the position where the gold-coated layer 32 falls is ground into a square or round shape according to different falling shapes, and then the welding position is cleaned to ensure that no oil stain exists; the red copper bonding nails are welded on the base material 31 at the position where the gold-wu layer 32 falls off in a segmented sequencing mode through manual welding rod arc welding, sufficient space is ensured to be filled with the gold-wu, after welding is completed, the welding seams are checked through visual inspection and a magnifying glass of 5 times, a hammer is used for knocking to judge whether the strength is met, after firm connection is confirmed, each welded red copper bonding nail is ground into a thick shape with a pointed upper head and a thick lower head through a manual straight grinding machine, so that the bonding strength is met, and the gold-wu layer 32 is convenient to fuse; then, matching manual oxy-acetylene gas welding with a Babbitt metal welding wire with the diameter of 3.0mm, wherein a welding gun is H01-300 type, a flame core is carbonized flame, firstly, filling and surfacing welding of a bottom layer is carried out by using a welding nozzle No. 01, and then, welding repair of a cover layer is carried out by using a welding nozzle No. 03; after the welding and surfacing of the worn part is finished, directly knocking the surface by a small hammer and enabling the surface to be fully covered with pits, wherein the lowest point of each pit is higher than the surface of the black gold layer 32, and enough margin is reserved for facilitating processing;

2.4, soldering the local cracking position of the wu-gold layer 32; before welding, a manual angle grinder is adopted to cut the cracks and then process the cracks into V-shaped or U-shaped grooves, and then the positions of welding repair are cleaned to ensure that no oil stains exist; then, matching manual oxy-acetylene gas welding with a Babbitt metal welding wire with the diameter of 3.0mm, wherein a welding gun is H01-300 type, a flame core is carbonized flame, firstly, filling and surfacing welding of a bottom layer is carried out by using a welding nozzle No. 01, and then, welding repair of a cover layer is carried out by using a welding nozzle No. 03; after the welding and surfacing of the worn part is finished, directly knocking the surface by a small hammer and enabling the surface to be fully covered with pits, wherein the lowest point of each pit is higher than the surface of the black gold layer 32, and enough margin is reserved for facilitating processing;

and 2.5, after all welding is finished and no defect is detected, manually grinding the welding supplement position, processing the welding supplement position to a size which meets the use size, checking and accepting through rolling of an on-site physical die, and delivering for use after the welding supplement position completely meets the process requirements.

Claims (6)

1. The utility model provides a large-scale gold shoe surface soldering device which characterized in that: the rotary rack comprises a rotary rack base (1) and a rotary bracket (2) which is rotatably arranged on the rotary rack base (1); the rotary support (2) comprises two wheel bodies (21) which are arranged in a bilateral symmetry mode, a half-moon-shaped frame (23) is connected between the two wheel bodies (21), and the front end and the rear end of the half-moon-shaped frame (23) are respectively and symmetrically provided with a bearing bush anti-falling device.

2. The large-scale ubm bearing shell surface weld repair device of claim 1, wherein: the rotating frame base (1) comprises a base frame (11), arc-shaped wheel seats (12) are symmetrically arranged at the tops of two sides of the base frame (11) respectively, and arc-shaped grooves (13) are arranged on the inner sides of the arc-shaped wheel seats (12) respectively; two wheel bodies (21) of the rotating support (2) correspond to the two arc-shaped wheel seats (12) respectively, annular protrusions (22) matched with the arc-shaped grooves (13) are arranged on the outer side of each wheel body (21), and each annular protrusion (22) is arranged in one corresponding arc-shaped groove (13).

3. The large-scale ubm bearing shell surface weld repair device according to claim 1 or 2, characterized in that: and a rotary crank (27) is arranged on the outer side of one wheel body (21).

4. The large-scale ubm bearing shell surface weld repair device according to claim 1 or 2, characterized in that: the bearing bush anti-drop device comprises an anti-drop base (24) fixedly arranged on the half-moon-shaped frame (23), a plurality of locking screw holes (25) are uniformly formed in the anti-drop base (24), and a locking screw rod (26) is arranged in each locking screw hole (25).

5. The large ubu bearing shell surface weld repair device of claim 3, wherein: the bearing bush anti-drop device comprises an anti-drop base (24) fixedly arranged on the half-moon-shaped frame (23), a plurality of locking screw holes (25) are uniformly formed in the anti-drop base (24), and a locking screw rod (26) is arranged in each locking screw hole (25).

6. A surface repair welding repair repairing process for a large-scale black gold bearing bush (3), wherein the black gold bearing bush (3) comprises a base material (31) and a black gold layer (32) arranged on the outer side of the base material (31), and is characterized in that the wear, local cracking and falling positions of the black gold layer (32) of the black gold bearing bush (3) are repaired by welding through the large-scale black gold bearing bush surface repair welding device according to any one of claims 1 to 5, and the steps are as follows:

firstly, preparing welding;

1.1), welding equipment: HT400D digital control inversion type manual direct current argon arc welding machine, direct current is reversely connected, and welding materials adopt aluminum bronze welding rods; oxygen-acetylene gas welding, wherein the welding material adopts Babbitt alloy;

1.2), oil stains, oxide layers, moisture and the like cannot be generated in a welding position area and a welding material, and metallic luster needs to be exposed;

1.3), welding technical requirements: the base material and the red copper combined nail are firm, the overlaying layer is fused with the base material, and the welding seam cannot have any welding defects;

1.4), weldment material: base material 35#, babbitt;

1.5), welding position: horizontally welding, and adjusting through a rotating bracket (2);

1.6), 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;

1.7), welding process parameters: determining welding parameters according to welding equipment, welding wire specifications and welding requirements;

secondly, welding and repairing;

2.1), placing the black gold bearing bush (3) to be repaired in a half-moon-shaped frame (23) of the large-scale black gold bearing bush surface welding device, and locking the frame through a bearing bush anti-falling device;

2.2) repairing the worn position of the wu-gold layer (23) by soldering; before welding, a manual straight grinding machine is adopted to grind the abrasion position, and the surface of the grinded black gold layer (23) is cleaned, so that no oil stain is ensured; then, matching manual oxy-acetylene gas welding with a Babbitt metal welding wire with the diameter of 3.0mm, wherein a welding gun is H01-300 type, a flame core is carbonized flame, firstly, filling and surfacing welding of a bottom layer is carried out by using a welding nozzle No. 01, and then, welding repair of a cover layer is carried out by using a welding nozzle No. 03; after the welding and surfacing of the worn part is finished, a small hammer is directly adopted to knock the surface and the surface is fully covered with pits, the lowest point of each pit is higher than the surface of the black gold layer (32), and enough margin is reserved for processing;

2.3) repair welding and repairing the local shedding position of the wu-gold layer (32); firstly, a plurality of red copper binding nails are manufactured according to the thickness of the black gold layer (32) and the area of the local falling position of the black gold layer (32), the red copper binding nails are made of red copper and are in cylindrical structures, and the height of the red copper binding nails does not exceed the thickness of the black gold layer (32); before welding, a manual straight grinding machine is adopted to grind the irregular black gold layer (32) which falls off, the base material (31) at the falling part of the black gold layer (32) is ground into a square or round shape according to different falling shapes, and then the position of a weld repair is cleaned to ensure that no oil stain exists; the red copper bonding nails are welded on a base material (31) at the falling position of the black gold layer (32) in a segmented sequencing mode through manual welding rod arc welding, enough space is guaranteed to be filled with black gold among the red copper bonding nails, after welding is completed, welding seams are checked through visual inspection and a magnifying glass which is 5 times of that of the welding seams, a small hammer is used for knocking to judge whether the strength is met, after firm connection is confirmed, each welded red copper bonding nail is ground into a thick shape with a pointed upper head and a thick lower head through a manual straight grinding machine, so that the bonding strength is met, and fusion of the black gold layer (32) is facilitated; then, matching manual oxy-acetylene gas welding with a Babbitt metal welding wire with the diameter of 3.0mm, wherein a welding gun is H01-300 type, a flame core is carbonized flame, firstly, filling and surfacing welding of a bottom layer is carried out by using a welding nozzle No. 01, and then, welding repair of a cover layer is carried out by using a welding nozzle No. 03; after the welding and surfacing of the worn part is finished, a small hammer is directly adopted to knock the surface and the surface is fully covered with pits, the lowest point of each pit is higher than the surface of the black gold layer (32), and enough margin is reserved for processing;

2.4) repair welding of local cracking positions of the wu-gold layer (32); before welding, a manual angle grinder is adopted to cut the cracks and then process the cracks into V-shaped or U-shaped grooves, and then the positions of welding repair are cleaned to ensure that no oil stains exist; then, matching manual oxy-acetylene gas welding with a Babbitt metal welding wire with the diameter of 3.0mm, wherein a welding gun is H01-300 type, a flame core is carbonized flame, firstly, filling and surfacing welding of a bottom layer is carried out by using a welding nozzle No. 01, and then, welding repair of a cover layer is carried out by using a welding nozzle No. 03; after the welding and surfacing of the worn part is finished, a small hammer is directly adopted to knock the surface and the surface is fully covered with pits, the lowest point of each pit is higher than the surface of the black gold layer (32), and enough margin is reserved for processing;

2.5) after all welding is finished and no defect is detected, manually grinding the welding supplement position, processing the welding supplement position to be in accordance with the use size, and carrying out rolling inspection and acceptance through a field physical die, and delivering for use after the welding supplement position is in accordance with the process requirements completely.

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