CN119369056A - A method for manufacturing a welded shell of a coal mining machine - Google Patents
A method for manufacturing a welded shell of a coal mining machine Download PDFInfo
- Publication number
- CN119369056A CN119369056A CN202411767348.3A CN202411767348A CN119369056A CN 119369056 A CN119369056 A CN 119369056A CN 202411767348 A CN202411767348 A CN 202411767348A CN 119369056 A CN119369056 A CN 119369056A
- Authority
- CN
- China
- Prior art keywords
- finishing
- coal mining
- mining machine
- manufacturing
- water pressure
- 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.)
- Pending
Links
- 239000003245 coal Substances 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 238000005065 mining Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims description 22
- 238000003466 welding Methods 0.000 claims abstract description 37
- 230000008439 repair process Effects 0.000 claims abstract description 26
- 230000007547 defect Effects 0.000 claims abstract description 24
- 238000005553 drilling Methods 0.000 claims abstract description 17
- 238000007689 inspection Methods 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 5
- 239000010959 steel Substances 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000005520 cutting process Methods 0.000 claims 1
- 239000000446 fuel Substances 0.000 claims 1
- 238000003754 machining Methods 0.000 abstract description 13
- 239000003921 oil Substances 0.000 description 6
- 238000011056 performance test Methods 0.000 description 5
- 238000007730 finishing process Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 238000010998 test method Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Landscapes
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a manufacturing method of a welding shell of a coal mining machine, which comprises the steps of steel plate blanking, welding and a first hydraulic tightness test, wherein the steps of semi-finishing, first drilling, first inspection repair welding, second hydraulic tightness test, finishing, second drilling and third hydraulic tightness test are sequentially carried out after the first hydraulic tightness test, each surface with roughness requirement is processed until a margin less than 1mm is left when the semi-finishing is carried out, screw holes with the position requirement of less than 0.5mm are reduced and processed when the first drilling is carried out, and a hole with the position requirement of more than or equal to 0.5mm is tapped in place when the first drilling is carried out, and a hole which is communicated with a welding line and has no position requirement is tapped in place. The invention solves the problem of great repair difficulty caused by exposure of the defects of the welding shell part of the coal mining machine during finish machining.
Description
Technical Field
The invention relates to a manufacturing method of a coal cutter shell, in particular to a manufacturing method of a welding shell of a coal cutter.
Background
In the coal mining process, gears of a transmission system of the coal mining machine are contacted and rubbed with each other, the surfaces of the gears are worn, a large amount of heat is generated, lubricating oil is required to be added in the transmission system of the coal mining machine in order to relieve the abrasion of the surfaces of the gears, reduce friction and increase heat dissipation, particularly a speed reduction cavity connected with a motor in a left traction box shell and a right traction box shell and a walking cavity connected with a walking box shell are required to be sealed by almost every welding traction box shell.
The production process in the prior art mainly comprises the steps of carrying out a first hydraulic sealing test after welding, then carrying out rough machining, inspection repair welding, finish machining and drilling in sequence, and then carrying out a second hydraulic sealing test. In the actual production process, the weld joint is unlikely to have no air holes, some air holes are difficult to find in the weld joint, sealing pressure is often generated when a second water pressure tightness test is carried out after the shell is finished, sealing pressure cannot be kept, defects (such as air holes) in the weld joint and the weld joint are channeling, water leakage of the weld joint is caused, the water pressure tightness test is failed, and the final product needs to be repaired, but the defects can influence the finished surface when the repair is carried out.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a manufacturing method of a welding shell of a coal mining machine, and aims to solve the problems that the quality problem of a welding seam cannot be found timely, the final hydraulic tightness test fails, and the product repair difficulty is high.
The manufacturing method of the welding shell of the coal mining machine comprises the following steps of steel plate blanking, welding and a first hydraulic tightness test, wherein the steps of semi-finishing, first drilling, first checking repair welding, second hydraulic tightness test, finishing, second drilling and third hydraulic tightness test are sequentially carried out after the first hydraulic tightness test, each surface with roughness requirement is processed until a allowance smaller than 1mm on a single side is left during semi-finishing, screw holes with the position requirement of less than 0.5mm are reduced during first drilling, tap holes with the position requirement of more than or equal to 0.5mm are drilled in place, and drill holes which are communicated with welding seams and have no position requirement are drilled in place.
Further, the semi-finishing process works in place for functional features that do not have relative mating requirements.
Further, the functional features include an oil drain hole, an oil filling hole and an oil indicator hole.
And further, the aperture tolerance of the hole related to the second hydraulic sealing test is matched with the axial tolerance of the hydraulic sealing tool during semi-finishing.
Further, the semi-finishing comprises shrinking the mounting screw holes around the tool plugging holes in the second hydraulic sealing performance test.
Further, the semi-finishing includes chamfering the aperture.
Further, a second repair welding is added between the second hydraulic sealing test and the finishing step, and the second repair welding is used for repairing the defect exposed by the second hydraulic sealing test.
Compared with the prior art, the invention has the advantages that:
The rough machining after the first hydraulic sealing performance test is changed into semi-finishing, the machining allowance of the working procedure is reduced in a controllable range, so that the defects of the welding seam are further exposed, and the defect that the defects are exposed again after finishing is avoided to be repaired. Further, the dimensional tolerance of the pilot hole involved in the second hydraulic sealing test is controlled in semi-finishing to prepare for the test.
And the second hydraulic sealing performance test is carried out before the finish machining, and the first inspection repair welding is carried out before the second hydraulic sealing performance test, so that the defects which are not easy to find at the small corners by the conventional inspection means can be more intuitively and effectively found and timely treated, and the defects are further repaired by the second repair welding to prepare for the finish machining. The found defects are repaired before the finishing process, so that repair work after finishing is reduced, and the influence of repair welding repair thermal deformation on the finished surface is reduced.
Detailed Description
The invention is further illustrated, but is not limited, by the following examples.
The invention relates to a manufacturing method of a welding shell of a coal mining machine, which sequentially comprises the following steps of steel plate blanking, steel plate welding groove pre-processing, assembling, first heat treatment, welding, second heat treatment, inspection, shot blasting, first hydraulic sealing test, scribing, semi-finishing, first drilling, first inspection repair welding, second hydraulic sealing test, second repair welding, finishing, second inspection, second drilling, clamp processing, third hydraulic sealing test, finished product inspection and warehousing.
Compared with the prior art, the rough machining is mainly changed into semi-finishing, the semi-finishing is required to finish each surface with roughness requirement until a single-side allowance of 1mm is reserved, the aperture tolerance of the hole related to the second hydraulic sealing test is matched with the shaft diameter tolerance of the hydraulic sealing tool, for example, the matching tolerance H7/f8 (the hydraulic tool with a sealing ring is installed in the hydraulic sealing test procedure), the periphery of the hole, sealed by the tool, of each hole is chamfered, and the periphery of the hole, sealed by the hydraulic sealing test, of the hydraulic sealing test is generally designed with a mounting screw hole, and in the procedure, the mounting screw hole can be reduced by 4mm for machining (for example, M12 screw hole drilling to M8) so as to facilitate the installation of the sealing tool in the second hydraulic sealing test procedure. In some embodiments, the mounting screws may also be left out of the way during this process and machined together in place during the finishing process. And in the second hydraulic tightness test procedure, the sealing tool is installed in a spot welding mode of the reinforcing plate, and the two schemes are implemented and verified to be feasible. For most of the welds processed in this process, most of the welds that need to be processed have been processed and removed, only the remaining 1mm depth has not been processed, and most of the weld defects can be fully exposed after this process has been performed, and these exposed defects are repaired in the first inspection repair process.
The main difference between the semi-finishing process and the traditional rough machining process is that in the processing content, after the hole size requirement is improved, the shape and position accuracy of the hole relative to the traditional rough machining process are also improved, so that functional characteristics such as an oil drain hole, an oil filling hole, an oil mark hole and the like which are not required by relative matching of other holes can be processed in place in advance for some position requirements, the subsequent finishing content is reduced, the subsequent finishing period is shortened, and meanwhile, defects are further exposed in advance.
In the first drilling process, the screw hole with the position degree of less than 0.5mm is reduced, for example, the screw hole of the drawing M12 is drilled and tapped into M8 in the working procedure, the screw hole with the position degree of more than or equal to 0.5mm is drilled and tapped in place, and the hole which is communicated with the welding seam and has no position degree requirement is drilled and tapped in place. The first hydraulic tightness test installation tool can be conveniently and fully exposed before the finish machining process through the first drilling, so that the defects can be timely found, and the product can be timely repaired.
The first inspection repair welding is to inspect and find the exposed defects in the previous procedures, and repair the defects, such as carbon arc stripping, polishing, preheating the uniform part, repair welding, boring and drilling.
During the second water pressure tightness test, firstly cleaning the parts, then using a designed tool to carry out the water pressure tightness test on the cavity, wherein the found defects and the defects which are exposed but not found can be intuitively found after the process is carried out, the cavity is filled with water and pressurized with 0.5MPa in the process, after the pressure is maintained for a specified time (generally not less than 30 min), if the pressure is reduced, the positions with the leakage are checked, namely the positions with the defects, and some defects which are difficult to find in small corners through the conventional checking means can be intuitively found.
And the second repair welding is used for repairing the defects found by the second hydraulic sealing performance test, such as carbon arc stripping, polishing, preheating of the uniform part and repair welding.
The process method of the invention can effectively reduce the condition of product repair after finish machining because defects are exposed in advance through a plurality of steps in the process.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411767348.3A CN119369056A (en) | 2024-12-04 | 2024-12-04 | A method for manufacturing a welded shell of a coal mining machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411767348.3A CN119369056A (en) | 2024-12-04 | 2024-12-04 | A method for manufacturing a welded shell of a coal mining machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN119369056A true CN119369056A (en) | 2025-01-28 |
Family
ID=94340750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411767348.3A Pending CN119369056A (en) | 2024-12-04 | 2024-12-04 | A method for manufacturing a welded shell of a coal mining machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN119369056A (en) |
-
2024
- 2024-12-04 CN CN202411767348.3A patent/CN119369056A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106078076B (en) | One kind failure hydraulic cylinder body bore area reproducing method | |
| CN110449848B (en) | Processing technology for overlaying stellite hard alloy thin-wall sleeve | |
| CN114046287B (en) | Hydraulic integrated cylinder barrel and processing method thereof | |
| CN111299968B (en) | Method for processing multi-thin-wall-hole rotating body welding structural part | |
| CN104959774B (en) | The method for repairing and mending of cylinder body | |
| CN102094969A (en) | Machining process for elastic sealing ring | |
| CN106062400B (en) | Method for manufacturing outer joint member of constant velocity universal joint, outer joint member, shaft member, and cup-shaped member | |
| CN110091125B (en) | Method for machining water line of sealing surface of air duct flange of compressor for pipeline | |
| WO2021098035A1 (en) | Aircraft engine exhaust casing welding method | |
| CN119369056A (en) | A method for manufacturing a welded shell of a coal mining machine | |
| CN110682067A (en) | Machining process for automobile rear axle housing assembly | |
| CN102744422A (en) | Technology of processing stainless steel forged-steel stop valve body by use of hydraulic hexagonal turret lathe | |
| CN114799758A (en) | Processing technology for fine matching connecting hole of water pump spindle and motor spindle | |
| CN113695859A (en) | Processing method of hydrogen fuel electric compressor shell | |
| CN113664469B (en) | Manufacturing method for improving reliability of spraying and lubricating flow passage of rocker arm shell of coal mining machine | |
| CN114370451B (en) | Gear box transmission inner shaft and processing technology thereof | |
| CN113523718B (en) | Manufacturing process of nuclear main pump bearing guide ring key groove of nuclear power station | |
| CN113000980A (en) | Construction process method for pipeline blanking | |
| JP2023074180A (en) | Pipe processing device and pipe processing method | |
| JP3767282B2 (en) | Steel pipe and its threading method | |
| CN115488594B (en) | Machining method of eccentric oil pump shell | |
| CN215831141U (en) | Composite wear-resisting ring | |
| CN111633388B (en) | Method for machining small lug hole of control ring of through-flow turbine | |
| CN112894260B (en) | Hydraulic valve block crack repairing method | |
| CN114669966B (en) | Processing method of oil cylinder body |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |