CN114932288B - Repair welding method for stepped hole of speed reducer shell - Google Patents
Repair welding method for stepped hole of speed reducer shell Download PDFInfo
- Publication number
- CN114932288B CN114932288B CN202210448199.9A CN202210448199A CN114932288B CN 114932288 B CN114932288 B CN 114932288B CN 202210448199 A CN202210448199 A CN 202210448199A CN 114932288 B CN114932288 B CN 114932288B
- Authority
- CN
- China
- Prior art keywords
- diameter end
- welding
- stepped hole
- shell
- repair welding
- 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
- 238000003466 welding Methods 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 19
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000001816 cooling Methods 0.000 claims abstract description 15
- 229910052786 argon Inorganic materials 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims description 5
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- 239000010937 tungsten Substances 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/003—Cooling means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/14—Titanium or alloys thereof
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
A repair welding method for a stepped hole of a reducer shell comprises the steps of manufacturing a supporting block according to the size of a small diameter end of the stepped hole, cleaning the surfaces of a large diameter end and the small diameter end, installing the supporting block into the small diameter end, putting the shell into a container filled with water, enabling the large diameter end of the stepped hole to face upwards, enabling the surface of the shell where an orifice of the large diameter end is located to be 1-2 cm above a water surface, blocking the small diameter end through the supporting block, guaranteeing that the inside of the stepped hole is in a water-free dry state, then repairing and welding the inner surface of the large diameter end through argon arc welding, adopting a multiple intermittent dispersed repair welding mode, enabling the cooling time between each time of welding to be not more than 30 seconds, enabling heat generated in the welding process to be conducted timely in a water cooling radiating mode during welding, reducing deformation of the shell caused by overhigh welding heat, guaranteeing that the size of the large diameter end meets requirements after welding is completed, and improving repair welding quality.
Description
Technical Field
The invention relates to the field of repair welding methods of speed reducer shells, in particular to a repair welding method of stepped holes of a speed reducer shell.
Background
The existing titanium alloy casting has the phenomenon of out-of-tolerance size after being machined, and is reworked by means of manual argon arc welding, polishing, re-returning machining and the like, so that the size of the product meets the requirement. Particularly, in the repair welding process of products, because the products are finished parts machined, the repair welding generates excessive heat, and the products are seriously deformed and can be scrapped. It can be seen that product deformation control during repair welding is a key point affecting whether the product can be repaired. Whether the product can be repaired is an important guarantee means for determining whether the product can be qualified or not, the product scrapping caused by the out-of-tolerance size of the product can be saved by effectively repairing the out-of-tolerance size of the product by machining, the qualification rate of the product is improved, and the exchange period of the product is ensured.
The reducer casing is generally a casing with a thin-wall hollow structure, one or more stepped holes are generally designed on the surface of the reducer casing, the stepped holes are generally processed according to the size of the small-diameter end of the stepped hole, then reaming is carried out according to the size of the large-diameter end, and because the reducer casing is thinner in wall thickness, the phenomenon of out-of-tolerance easily occurs during reaming, so that the diameter or depth size of the large-diameter end is overlarge, and repair welding is needed at the moment. However, due to the heat generated by welding, the thin-wall shell is easy to deform in the welding process, so that the welding out-of-tolerance can occur after the welding is completed and the shell is cooled. In order to control welding deformation and ensure welding quality, the prior art adopts a repair welding mode which is performed intermittently for a plurality of times, the welding time is not longer than 30 seconds each time, the cooling time is not shorter than 30 minutes, and the shell is radiated in the welding process as much as possible, but the actual radiating effect is insufficient, the welding out-of-tolerance still occurs, and the repair welding is extremely long in required working time and low in efficiency due to overlong cooling time.
Disclosure of Invention
The invention provides a repair welding method for stepped holes of a speed reducer shell, which aims to solve the problem that the existing speed reducer shell is easy to produce repair welding out-of-tolerance.
The technical scheme adopted by the invention for solving the technical problems is as follows: a repair welding method for a stepped hole of a speed reducer shell is used for repair welding a large-diameter end of the stepped hole positioned at one side of the shell, manufacturing a supporting block according to the size of a small-diameter end of the stepped hole, cleaning the surfaces of the large-diameter end and the small-diameter end, installing the supporting block into the small-diameter end, putting the shell into a container filled with water, enabling the large-diameter end of the stepped hole to face upwards, enabling the surface of the shell where an orifice of the large-diameter end is positioned to be 1-2 cm above a water surface, blocking the small-diameter end through the supporting block, guaranteeing that the inside of the stepped hole is in a dry state, then repair welding the inner surface of the large-diameter end through argon arc welding, adopting a multiple intermittent repair welding mode, enabling the time of each welding to be not more than 30 seconds, and enabling cooling time between two adjacent welding to be not less than 10 minutes.
Preferably, the supporting block is of a disc-shaped structure, and the outer circular surface of the supporting block is in interference fit with the inner wall of the small-diameter end of the stepped hole.
Preferably, the current intensity of argon arc welding is 40-210A, the flow rate of argon gas in a welding gun is 6-30L/min, the diameter of a tungsten electrode is 1.5-3.5 mm, and the flow rate of shielding gas is 5-30L/min.
According to the technical scheme, the invention has the beneficial effects that:
according to the invention, the reducer shell is put into water for repair welding, the support block is designed and installed at the small diameter end, so that water can be prevented from entering the stepped hole, the shell surface where the orifice of the large diameter end is positioned is controlled to be positioned 1-2 cm above the water surface, the inside of the stepped hole can be ensured to be in a waterless dry state, and the shell side wall near the large diameter end of the stepped hole can be immersed in water as much as possible, so that heat generated in the welding process can be timely conducted out in a water cooling heat dissipation mode during welding, deformation of the shell caused by overhigh welding heat is reduced, the size of the large diameter end can be ensured to meet the requirement after welding is finished, and repair welding quality is improved. In addition, because the invention adopts a water cooling mode, and the water cooling efficiency is far higher than that of the original shell for naturally cooling, the invention only needs 10 minutes of cooling time between intermittent welding for many times, but at least 30 minutes of cooling time, so the invention greatly reduces the working hours required by repair welding, improves the repair welding efficiency and effectively prevents the repair welding from exceeding the tolerance.
Drawings
FIG. 1 is a schematic top view of a reducer housing;
fig. 2 is a cross-sectional view taken along A-A of fig. 1.
The marks in the figure: 1. the shell comprises a shell body, a first stepped hole, a second stepped hole, a large-diameter end, a small-diameter end and a large-diameter end, wherein the first stepped hole, the second stepped hole and the large-diameter end are respectively arranged at the shell body, the large-diameter end and the small-diameter end.
Detailed Description
Referring to the drawings, the specific embodiments are as follows:
a repair welding method of a stepped hole of a speed reducer shell is used for repair welding a large-diameter end 4 of the stepped hole positioned on one side of the shell. As shown in fig. 1 and 2, the reducer casing is a casing 1 with a thin-wall hollow structure, and two stepped holes, namely a first stepped hole 2 and a second stepped hole 3, are respectively designed on one side surface of the reducer casing. The two step holes are usually machined by machining through holes according to the size of the small diameter end 5 of the step hole, then reaming is carried out according to the size of the large diameter end 4, and the phenomenon of out-of-tolerance easily occurs during reaming due to the fact that the wall thickness of the shell 1 is thinner, so that the diameter or depth size of the large diameter end 4 is overlarge, and repair welding is needed at the moment.
The repair welding method comprises the following steps: firstly, manufacturing a supporting block according to the size of a small-diameter end 5 of a stepped hole, wherein the supporting block is of a general disc-shaped structure, the outer circular surface of the supporting block is in interference fit with the inner wall of the small-diameter end 5 of the stepped hole, then cleaning the surfaces of a large-diameter end 4 and the small-diameter end 5, and then installing the supporting block into the small-diameter end 5.
Then put into the container that holds water with the casing, make the big footpath end 4 of shoulder hole upwards, and the casing surface that the drill way of big footpath end 4 was located is located 1 ~ 2cm above the surface of water, and pass through supporting shoe shutoff path end 5, both can guarantee that the inside of shoulder hole is anhydrous dry state, also can make the casing lateral wall near big footpath end 4 of shoulder hole dip in water as much as possible, through the mode of water-cooling heat dissipation when welding like this, can guarantee that the heat that produces in the welding process is timely to be derived, reduce the deformation that the casing leads to the fact because of welding heat is too high.
And then carrying out repair welding on the inner surface of the large-diameter end 4 by argon arc welding, wherein the current intensity of the argon arc welding is 40-210A, the argon flow of a welding gun is 6-30L/min, the diameter of a tungsten electrode is 1.5-3.5 mm, the flow of shielding gas is 5-30L/min, a multiple intermittent distributed repair welding mode is adopted, the welding time is not more than 30 seconds each time, and the cooling time between two adjacent welding is not less than 10 minutes.
Taking the first stepped hole 2 as an example, the first stepped hole 2 of the reducer housing made of titanium alloy is found to have an out-of-tolerance diameter after processing, and repair welding is needed. The conventional welding method and the welding method of the invention are adopted respectively, argon arc welding with the same parameters is adopted, but the welding time of each time in the conventional welding method is not longer than 30 seconds, the cooling time is not shorter than 30 minutes, and the size is measured after the welding is finished.
The size detection and actual result comparison of the welded titanium alloy part show that the deformation of the conventional repair welding part is large, the relative size of the repair welding part is out of tolerance after repair welding, the size of the repair welding product is out of tolerance by about 0.1mm, the size of the part still cannot meet the drawing requirement, and the repair of the part product fails and cannot be used. The dimension out-of-tolerance of the part product welded by the repair method is about 0.03mm, so that the drawing requirement is met, the repair is successful, and the use requirement is met. Therefore, the invention can effectively repair the out-of-tolerance dimension, can save the product scrapping caused by the out-of-tolerance dimension, improves the qualification rate of the product, and ensures the exchange period of the product.
Claims (2)
1. A repair welding method for a stepped hole of a speed reducer shell is used for repair welding a large-diameter end of the stepped hole positioned at one side of the shell, and is characterized in that: according to the size of the small diameter end of the stepped hole, the surfaces of the large diameter end and the small diameter end are cleaned, the supporting block is installed in the small diameter end, then the shell is placed in a container containing water, the large diameter end of the stepped hole faces upwards, the surface of the shell where an orifice of the large diameter end is located 1-2 cm above the water surface, the small diameter end is plugged through the supporting block, the inside of the stepped hole is guaranteed to be in a non-water dry state, then the inner surface of the large diameter end is subjected to repair welding through argon arc welding, a multiple intermittent distributed repair welding mode is adopted, the time of each time of welding is not more than 30 seconds, the cooling time between two adjacent times of welding is not less than 10 minutes, the supporting block is in a disc-shaped structure, and the outer circular surface of the supporting block is in interference fit with the inner wall of the small diameter end of the stepped hole.
2. The repair welding method for the stepped bore of the reducer casing according to claim 1, wherein: the current intensity of argon arc welding is 40-210A, the flow rate of argon gas in a welding gun is 6-30L/min, the diameter of a tungsten electrode is 1.5-3.5 mm, and the flow rate of shielding gas is 5-30L/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210448199.9A CN114932288B (en) | 2022-04-27 | 2022-04-27 | Repair welding method for stepped hole of speed reducer shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210448199.9A CN114932288B (en) | 2022-04-27 | 2022-04-27 | Repair welding method for stepped hole of speed reducer shell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114932288A CN114932288A (en) | 2022-08-23 |
| CN114932288B true CN114932288B (en) | 2024-03-22 |
Family
ID=82862336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210448199.9A Active CN114932288B (en) | 2022-04-27 | 2022-04-27 | Repair welding method for stepped hole of speed reducer shell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114932288B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102886590A (en) * | 2012-10-16 | 2013-01-23 | 重庆望江工业有限公司 | Method for repairing defects of parts by adopting manual arc welding and soaked repair welding |
| CN106975825A (en) * | 2017-03-30 | 2017-07-25 | 北京百慕航材高科技股份有限公司 | Cool down repair method |
| CN107378377A (en) * | 2017-07-12 | 2017-11-24 | 齐齐哈尔众工科技有限公司 | A kind of restorative procedure of rubber drying machine cylinder inboard wall |
| CN109514045A (en) * | 2018-10-29 | 2019-03-26 | 唐宏泉 | A kind of process for welding repair for new-energy automobile water cooling motor housing water jacket |
| CN110977095A (en) * | 2019-12-25 | 2020-04-10 | 安徽应流铸业有限公司 | Method for preventing welding repair deformation of CK3MCuN austenitic stainless steel casting after finish machining |
| CN111558755A (en) * | 2020-05-20 | 2020-08-21 | 无锡承驰伟业焊接科技有限公司 | Repair welding process of water-cooled motor |
| CN114101913A (en) * | 2021-12-08 | 2022-03-01 | 中国航发南方工业有限公司 | Repair welding method for deep groove of blade casting |
-
2022
- 2022-04-27 CN CN202210448199.9A patent/CN114932288B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102886590A (en) * | 2012-10-16 | 2013-01-23 | 重庆望江工业有限公司 | Method for repairing defects of parts by adopting manual arc welding and soaked repair welding |
| CN106975825A (en) * | 2017-03-30 | 2017-07-25 | 北京百慕航材高科技股份有限公司 | Cool down repair method |
| CN107378377A (en) * | 2017-07-12 | 2017-11-24 | 齐齐哈尔众工科技有限公司 | A kind of restorative procedure of rubber drying machine cylinder inboard wall |
| CN109514045A (en) * | 2018-10-29 | 2019-03-26 | 唐宏泉 | A kind of process for welding repair for new-energy automobile water cooling motor housing water jacket |
| CN110977095A (en) * | 2019-12-25 | 2020-04-10 | 安徽应流铸业有限公司 | Method for preventing welding repair deformation of CK3MCuN austenitic stainless steel casting after finish machining |
| CN111558755A (en) * | 2020-05-20 | 2020-08-21 | 无锡承驰伟业焊接科技有限公司 | Repair welding process of water-cooled motor |
| CN114101913A (en) * | 2021-12-08 | 2022-03-01 | 中国航发南方工业有限公司 | Repair welding method for deep groove of blade casting |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114932288A (en) | 2022-08-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2170546B1 (en) | Apparatus and method for hybrid machining a contoured, thin-walled workpiece | |
| CN104513952B (en) | The preparation method and target material assembly of target material assembly | |
| CN114101913B (en) | Repair welding method for deep groove of blade casting | |
| CN110026751B (en) | Manufacturing method of oil groove of planetary bevel gear | |
| US20190177872A1 (en) | Electrolytic polishing method and device and method for producing a cathode | |
| CN110359039A (en) | A kind of Press Tools for Automobiles production method based on laser melting reinforcement technique | |
| CN107760844A (en) | Method and apparatus for manufacturing fuel distributor | |
| CN112404461A (en) | Turning method of titanium target assembly | |
| CN114932288B (en) | Repair welding method for stepped hole of speed reducer shell | |
| CN110116257A (en) | A kind of welding method being applied to radial bearing shell babbit using CMT | |
| Tianyu et al. | Electrochemical discharge machining for fabricating holes in conductive materials: A review | |
| CN109249126B (en) | Welding tool and welding method for anode steel claw | |
| CN111775072B (en) | Diamond roller machining process for special-shaped grinding surface | |
| CN115488360B (en) | Efficient turning method for annular mortise of high-temperature alloy disc | |
| CN111673209B (en) | High-speed arc machining inner flushing liquid negative pressure suction device and machining method | |
| CN106392515B (en) | A kind of processing method of sprue bush cooling bath | |
| CN109023349A (en) | A method of improving used in aluminium alloy casting metal type dies laser melting coating repair layer binding force | |
| CN113996690A (en) | Manufacturing method of large thin-wall special-shaped curved surface component | |
| JP2002103146A (en) | Electrochemical machining method for deformed hole | |
| CN109849241A (en) | A kind of manufacturing method of automobile tire mould | |
| CN109296463A (en) | One kind preventing the super calibration method of engine oil system aluminium content | |
| KR100933348B1 (en) | Straight | |
| CN114012179B (en) | High-strength heat-resistant chip removal titanium film saw blade and processing technology thereof | |
| CN219452692U (en) | Connecting equipment for welding steel-welded copper holder | |
| CN113560830B (en) | Method for manufacturing electroslag casting type impact type rotating wheel |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |