CN110919215A - Die welding process - Google Patents
Die welding process Download PDFInfo
- Publication number
- CN110919215A CN110919215A CN201911305519.XA CN201911305519A CN110919215A CN 110919215 A CN110919215 A CN 110919215A CN 201911305519 A CN201911305519 A CN 201911305519A CN 110919215 A CN110919215 A CN 110919215A
- Authority
- CN
- China
- Prior art keywords
- welding
- die
- groove
- mould
- welding process
- 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
Images
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
- B23K28/00—Welding or cutting not covered by any of the preceding groups, e.g. electrolytic welding
- B23K28/02—Combined welding or cutting procedures or apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Forging (AREA)
Abstract
The invention provides a die welding process, which preheats a die, removes cracks, cleans slag, integrally preheats, adopts mixed gas shielded welding, flat welding, multi-pass welding, and tempering treatment after welding to eliminate stress. The beneficial effects are as follows: the invention avoids the mould scrapping caused by insufficient closing height of the mould due to repeated falling when the mould is renovated, can greatly prolong the service life of the mould, and even can greatly reduce the purchasing quantity of modules, thereby saving the material cost of the mould.
Description
Technical Field
The invention relates to the field of die welding, in particular to a die welding process.
Background
In the forging industry, the precision and the service life of the die are directly related to the quality, the performance, the production efficiency and the production cost of a forged piece product, so the quality and the service life of the forging die are important points concerned by forging enterprises. The die surfacing repair technology is generally accepted by the forging industry as an important means for repairing a forging die body to prolong the service life of the die, but the factory still lacks a detailed and definite surfacing process, and the die surfacing process is urgently needed to be solved.
The existing scheme is as follows: overlaying the die cavity by using carbon dioxide gas shielded welding, remanufacturing the die cavity, and performing heat treatment again.
The original surfacing welding die has no detailed and definite process guidance, the die is not preheated before welding, the cracked part of the die is directly planed and surfacing welded, and the stress is eliminated without heat treatment after welding; the phenomena of cracking and slag falling appear very fast in the use process of the die, so that the die is directly abandoned, and the effect of prolonging the service life of the die by putting the die into production again after welding repair cannot be achieved.
Disclosure of Invention
The invention provides a die welding process for solving the problems in the prior art.
The technical scheme of the invention is realized as follows:
a die welding process, characterized by the steps comprising:
1) heating the mould to 300-400 ℃;
2) removing all cracks by using a carbon arc gouging machine, and continuously extending for 30mm at the groove after removing the cracks;
3) processing the groove by using a grinder and a carbon arc gouging machine to smooth the surface of the groove and expose the metallic luster;
4) grinding the slag and the black spots at the carbon arc gouging and the two sides to be welded within 20mm of each other by using a grinder, wherein the groove is required to have no sharp corner or dead corner;
5) then heating the whole die to 450 ℃;
6) welding the groove by adopting mixed gas shielded welding;
7) backing welding, filling and cover surface welding are carried out on the groove;
8) welding at a flat welding position, adopting multiple layers and multiple welding passes, removing welding slag after each welding pass is finished, and striking by using an air pick or a mechanical method to ensure that a cladding layer achieves the optimal crystal combination and reduce the internal stress generated by welding;
9) controlling the temperature between the channels to be 450-500 ℃;
10) and carrying out heat treatment in time after welding to eliminate the structural stress.
In step 1), the mold is heated to 320-370 ℃.
In the step 2), the bevel angle a generated after the removal of the crack is 45-60 degrees.
In step 6), the mixed gas shielded welding adopts (80% Ar +20% CO)2）,H08Mn2SiMnA,φ1.2。
In the step 7), the current and the voltage for backing welding are respectively 280A-300A and 30V-32V; the current and voltage adopted by the filling and capping welding are 260A-280A and 28V-30V respectively.
In step 10), the conditions of the heat treatment are: high-temperature tempering at 550 ℃, keeping the temperature for 12 hours, cooling in a furnace at 200 ℃, and then cooling in air.
The invention has the beneficial effects that:
1. the mould is prevented from falling repeatedly when being renovated, so that the mould is scrapped due to insufficient closing height, the height of a newly purchased module can be greatly reduced, and even low-alloy quenched and tempered steel can be used as a mould base body, so that the material cost of the mould is saved;
2. aiming at different failure modes and failure positions of the die, different welding materials are adopted to carry out surfacing welding on the die, and the wear resistance of the welding materials is superior to that of the forging die body material, so that the service life of the die can be prolonged by more than 2-3 times, the processing period of the die is shortened, the production efficiency is improved, and the production cost is reduced;
3. the waste mould is reformed into the required mould by adopting a surfacing technology, so that waste module materials are utilized to the maximum extent;
4. energy conservation and consumption reduction, and the module can be repeatedly utilized, thereby reducing resource consumption and conforming to the national macro regulation and control of energy conservation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of a groove on a mold.
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 obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
The die welding process shown in fig. 1 is characterized by comprising the following steps:
1) heating the mould to 300-400 ℃;
2) removing all cracks by using a carbon arc gouging machine, and continuously extending for 30mm at the groove after removing the cracks;
3) processing the groove by using a grinder and a carbon arc gouging machine to smooth the surface of the groove and expose the metallic luster;
4) grinding the slag and the black spots at the carbon arc gouging and the two sides to be welded within 20mm of each other by using a grinder, wherein the groove is required to have no sharp corner or dead corner;
5) then heating the whole die to 450 ℃;
6) welding the groove by adopting mixed gas shielded welding;
7) backing welding, filling and cover surface welding are carried out on the groove;
8) welding at a flat welding position, adopting multiple layers and multiple welding passes, cleaning welding slag after each welding pass is finished, and striking by using an air pick or a mechanical method to ensure that a cladding layer achieves the optimal crystal combination and reduce the internal stress generated by welding;
9) controlling the temperature between the channels to be 450-500 ℃;
10) and (3) timely performing heat treatment after welding: high-temperature tempering at 550 ℃, keeping the temperature for 12 hours, cooling in a furnace at 200 ℃, and then cooling in air.
In step 1), the mold is heated to 320-370 ℃.
In step 2), as shown in fig. 1, the bevel angle a generated after chipping off the crack is 45 ° to 60 °.
In step 6), the mixed gas shielded welding adopts (80% Ar +20% CO)2）,H08Mn2SiMnA,φ1.2。
In the step 7), the current and the voltage for backing welding are respectively 280A-300A and 30V-32V; the current and voltage adopted by the filling and capping welding are 260A-280A and 28V-30V respectively.
The technological process of the invention avoids the repeated falling of the die during renovation to cause the die to be scrapped due to insufficient closing height, can also greatly reduce the height of a newly purchased module, and even can adopt low-alloy quenched and tempered steel as a die base body, thereby saving the material cost of the die.
Aiming at different failure modes and failure positions of the die, different welding materials can be adopted to carry out surfacing welding on the die, the wear resistance of the welding materials is superior to that of the forging die body material, the service life of the die can be prolonged by more than 2-3 times, the processing period of the die is shortened, the production efficiency is improved, and the production cost is reduced.
In the step 6 and the step 7, a surfacing technology is adopted, the waste mould is changed into a required mould, and waste module materials are utilized to the maximum extent.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A die welding process, characterized by the steps comprising:
1) heating the mould to 300-400 ℃;
2) removing all cracks by using a carbon arc gouging machine, and continuously extending for 30mm at the groove after removing the cracks;
3) processing the groove by using a grinder and a carbon arc gouging machine to smooth the surface of the groove and expose the metallic luster;
4) grinding the slag and the black spots at the carbon arc gouging and the two sides to be welded within 20mm of each other by using a grinder, wherein the groove is required to have no sharp corner or dead corner;
5) then heating the whole die to 450 ℃;
6) welding the groove by adopting mixed gas shielded welding;
7) backing welding, filling and cover surface welding are carried out on the groove;
8) welding at a flat welding position, adopting multiple layers and multiple welding passes, removing welding slag after each welding pass is finished, and striking by using an air pick or a mechanical method to ensure that a cladding layer achieves the optimal crystal combination and reduce the internal stress generated by welding;
9) controlling the temperature between the channels to be 450-500 ℃;
10) and carrying out heat treatment in time after welding to eliminate the structural stress.
2. The die welding process of claim 1, wherein: in step 1), the mold is heated to 320-370 ℃.
3. The die welding process of claim 1, wherein: in the step 3), the bevel angle a generated after the removal of the crack is 45-60 degrees.
4. The die welding process of claim 1, wherein: in step 6), the mixed gas shielded welding adopts (80% Ar +20% CO)2）,H08Mn2SiMnA,φ1.2。
5. The die welding process of claim 1, wherein: in the step 7), the current and the voltage for backing welding are respectively 280A-300A and 30V-32V; the current and voltage adopted by the filling and capping welding are 260A-280A and 28V-30V respectively.
6. The die welding process of claim 1, wherein: in step 10), the conditions of the heat treatment are: tempering at 550 ℃, keeping the temperature for 12 hours, and cooling in a furnace to 200 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911305519.XA CN110919215A (en) | 2019-12-18 | 2019-12-18 | Die welding process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911305519.XA CN110919215A (en) | 2019-12-18 | 2019-12-18 | Die welding process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110919215A true CN110919215A (en) | 2020-03-27 |
Family
ID=69863015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911305519.XA Pending CN110919215A (en) | 2019-12-18 | 2019-12-18 | Die welding process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110919215A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112207526A (en) * | 2020-10-20 | 2021-01-12 | 江苏亨睿碳纤维科技有限公司 | Composite material autoclave forming die and manufacturing method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130064386A (en) * | 2011-12-08 | 2013-06-18 | 주식회사 포스코 | Precipitation hardening type die steel with excellent hardness and toughness and the method of manufacturing the same |
| CN103182618A (en) * | 2011-12-28 | 2013-07-03 | 湖北三环车桥有限公司 | Overlaying manufacture repair technology for roll forging die |
| CN103962791A (en) * | 2013-02-01 | 2014-08-06 | 哈尔滨建成集团有限公司 | Welding repair method for large-sized heat-resistant steel castings |
| CN108505032A (en) * | 2018-02-28 | 2018-09-07 | 南京江联焊接技术有限公司 | A method of it repairs and reinforcing crankshafts forging mold surface |
| CN110480289A (en) * | 2019-08-27 | 2019-11-22 | 东光县伟通机电有限公司 | A kind of precision hot die forming technique |
-
2019
- 2019-12-18 CN CN201911305519.XA patent/CN110919215A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130064386A (en) * | 2011-12-08 | 2013-06-18 | 주식회사 포스코 | Precipitation hardening type die steel with excellent hardness and toughness and the method of manufacturing the same |
| CN103182618A (en) * | 2011-12-28 | 2013-07-03 | 湖北三环车桥有限公司 | Overlaying manufacture repair technology for roll forging die |
| CN103962791A (en) * | 2013-02-01 | 2014-08-06 | 哈尔滨建成集团有限公司 | Welding repair method for large-sized heat-resistant steel castings |
| CN108505032A (en) * | 2018-02-28 | 2018-09-07 | 南京江联焊接技术有限公司 | A method of it repairs and reinforcing crankshafts forging mold surface |
| CN110480289A (en) * | 2019-08-27 | 2019-11-22 | 东光县伟通机电有限公司 | A kind of precision hot die forming technique |
Non-Patent Citations (1)
| Title |
|---|
| 丁绍祥等: "《钢结构加固工程技术手册》", 31 October 2008, 华中科技大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112207526A (en) * | 2020-10-20 | 2021-01-12 | 江苏亨睿碳纤维科技有限公司 | Composite material autoclave forming die and manufacturing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109014518B (en) | Welding device and repairing process for train wheel die holder | |
| CN105478764A (en) | Welding repair technology of forging die 3D printing material increase | |
| CN101767262B (en) | Reproducing method of forging mold by using composite build-up welding | |
| CN101628374A (en) | Method for preparing forging mould by double-layer metal resurfacing welding based on cast steel substrate | |
| CN105798424A (en) | Roll surfacing repair device and repair method | |
| CN105855788A (en) | Welding process for repairing crack of ball milling iron casting | |
| CN111843101A (en) | Method for repairing and welding copper mold bottom plate made of nodular cast iron | |
| CN103993309A (en) | Method for re-manufacturing roller through laser | |
| CN106736326A (en) | Automobile die method for surface hardening | |
| CN110919215A (en) | Die welding process | |
| CN104532131A (en) | Method for prolonging service life of slitting wheel of rolling mill | |
| CN103008833B (en) | The overlaying method of dovetail groove anticorrosion antiwear layer | |
| CN112935480B (en) | Repairing process for surface abrasion of large wheel fixing table base | |
| CN108356397B (en) | Large container corrosion-resistant layer wide-band-electrode surfacing method based on residual stress regulation | |
| CN101934434B (en) | Cast iron hot repair welding process and device | |
| CN104999228A (en) | Steel casting surface quality processing technology | |
| CN100999032B (en) | New technology of valve sealing element vacuum induction pile-up welding hard alloy and improved equipment | |
| CN111001992A (en) | Method for compositing rail beam blank-opening roller into semi-high-speed steel roller through overlaying welding | |
| CN217394001U (en) | Simple welding device for cracking of large-scale high-voltage motor base lug | |
| CN112589241A (en) | Vertical grinding roller core inclined plane welding repair method | |
| CN106826090A (en) | A kind of Piston Rods Die built-up welding preparation technology | |
| CN111250824A (en) | Welding device and repair process for inner hole wear surface of upper cross beam of large hydraulic press | |
| CN105149727A (en) | Medium carbon steel defect removal method | |
| CN103350316B (en) | A kind of method of 4PG 900 × 700 four-roller crusher roller skin Bead weld repair | |
| CN113373293B (en) | Repair welding heat treatment method for inner wall corrosion area of hydrogenation reactor of large-scale chemical equipment |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200327 |