CN105478764A - Welding repair technology of forging die 3D printing material increase - Google Patents

Welding repair technology of forging die 3D printing material increase Download PDF

Info

Publication number
CN105478764A
CN105478764A CN201510911896.3A CN201510911896A CN105478764A CN 105478764 A CN105478764 A CN 105478764A CN 201510911896 A CN201510911896 A CN 201510911896A CN 105478764 A CN105478764 A CN 105478764A
Authority
CN
China
Prior art keywords
welding
cavity
prints
forging die
mold cavity
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.)
Granted
Application number
CN201510911896.3A
Other languages
Chinese (zh)
Other versions
CN105478764B (en
Inventor
张运军
邓庆文
刘胜春
陈天赋
邵光保
周明
左长兵
权开峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hubei Tri Ring Forging Co Ltd
Original Assignee
Hubei Tri Ring Forging Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hubei Tri Ring Forging Co Ltd filed Critical Hubei Tri Ring Forging Co Ltd
Priority to CN201510911896.3A priority Critical patent/CN105478764B/en
Publication of CN105478764A publication Critical patent/CN105478764A/en
Application granted granted Critical
Publication of CN105478764B publication Critical patent/CN105478764B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/20—Direct sintering or melting
    • B22F10/25—Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/30—Process control
    • B22F10/36—Process control of energy beam parameters
    • B22F10/366—Scanning parameters, e.g. hatch distance or scanning strategy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/60—Treatment of workpieces or articles after build-up
    • B22F10/68—Cleaning or washing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/80—Data acquisition or data processing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/007—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/60—Treatment of workpieces or articles after build-up
    • B22F10/64—Treatment of workpieces or articles after build-up by thermal means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)

Abstract

The invention relates to the technical field of forging dies, in particular to a welding repair technology of forging die 3D printing material increase. By means of the steps of cavity cleaning, scan modeling, material increase repairing, accurate repairing and the like, after metal such as a fatigue layer is removed, welding materials are increased layer by layer for printing according to comparison of a cavity and a target cavity, the cavity is machined to be similar to the target cavity in size, then fine repairing is further carried out, and therefore the target cavity is obtained. Compared with the prior art, according to the machining technology, welding can be omitted, and the service life of dies can be prolonged.

Description

Forging die 3D prints and increases material welding and restoring process
Technical field
The present invention relates to forging mold technical field, particularly relate to a kind of forging die 3D and print increasing material welding and restoring process.
Background technology
Forging is one of common technology of engineering goods production, the mould that forging uses is the key of formed product, repeat to forge the brute force of mould due to during forging, after certain hour, the physical dimension that mold cavity there will be in various degree expands, even crack at some position, need to repair it.
The applicant is disclose one " thin layer welding repair technology for forging die cavity " in the patent application of 200510018789 at application number, its technical scheme adopted is: first mold cavity is evenly expanded 3-5mm, then mold integral heated to 350-400 DEG C and keep this temperature to carry out soldering, welding rod is heated to 300-350 DEG C of maintenance 40-70 minute, naturally be down to after normal temperature for soldering, during electric welding, adopt the mode of multilayer welding, every layer of soldering THICKNESS CONTROL is between 0.8-1.5mm, every one deck is all from circumferential edge edge, terminate in the middle of mold cavity, until slightly above mold cavity original size, then mould is carried out tempering, temperature 400-500 DEG C, tempering insulation time is determined by mould maximum gauge 1 hour/2.5cm, naturally normal temperature is down to after tempering, fine machining die die cavity is to originally using size again.
Adopt this processing technology, long processing time, need to consume a large amount of wlding, cause mould repair cost higher.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, and provide a kind of forging die 3D to print increasing material welding and restoring process, wlding can be saved, improve die life, reduce mould repair cost.
The technical solution adopted for the present invention to solve the technical problems is: a kind of forging die 3D prints and increases material welding and restoring process, and it comprises the steps.
A, cleaning die cavity, remove the fatigue layer in mold cavity to be repaired, crackle, cleaning impurity;
B, scanning modeling, mold cavity is scanned and sets up threedimensional model, data processing is carried out to this threedimensional model, after reserved allowance, obtain this mold cavity being carried out increase material and repair the number of plies, the often layer thickness of required processing and the shape of every layer, these data are exported;
C, the reparation of increasing material, the data obtained according to step b, successively weld by the mode of arc surfacing the imitated structure obtaining target die cavity;
D, accurately to repair, be positive mold cavity for machining allowance, remove excess metal by refine, and sanding and polishing; For the mold cavity that machining allowance is negative, by the mode of thermal spraying, mold cavity is machined to target die cavity, and sanding and polishing.
In step a, the thickness removing fatigue layer in mold cavity is 8mm ~ 10mm, and carries out detecting whether have crackle.
In step b, reserved allowance is timing, and reserved allowance is 0.5mm ~ 1mm, and reserved allowance is for time negative, and reserved allowance is-1mm ~-0.2mm.
In step c, when every one deck welding, the track of welding is scroll, welds from the edge of die cavity, terminates to centre position, gapless between adjacent weld seam.
As another kind of embodiment, in step c, when every one deck welding, the track of welding is scroll, welds from the edge of die cavity, terminates to centre position, leave gap between adjacent weld seam, the width in this gap is 0.5 times of weld width, and adjacent layer is interlaced.
In step c, the thickness of weld seam is 1mm, and the width of weld seam is 1.5mm.
In step c, after welding, mould is carried out temper.
In step a, carbon arc air gouging technique is adopted to remove fatigue layer, crackle.
The invention has the beneficial effects as follows: a kind of forging die 3D prints and increases material welding and restoring process, by the step such as cleaning die cavity, scanning modeling, the reparation of increasing material, accurately reparation, after removing the metals such as fatigue layer, according to the contrast of die cavity and target die cavity, use wlding successively to increase material and print, by pocket machining to size and target die cavity similar, and then refine further, thus obtaining target die cavity, this processing technology is compared to existing technology, can welding be saved, increase die life.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further detailed explanation, is not practical range of the present invention is limited to this.
The forging die 3D of the present embodiment prints and increases material welding and restoring process, and it comprises the steps:
A, cleaning die cavity, adopt carbon arc air gouging technique, and the fatigue layer in mold cavity to be repaired, crackle are removed, the thickness removing fatigue layer is about 8mm ~ 10mm, and carries out detecting whether have crackle, cleaning impurity.
B, scanning modeling, by 3D scanner mold cavity scanned and set up threedimensional model, the target die cavity designed is converted into threedimensional model, the threedimensional model scanning threedimensional model and the design obtained is compared, and be after following process reserves allowance according to processing conditions, thus obtain needing the form of metal that increases in die cavity, by this shape hierarchy, the shape of the number of plies of the required processing of repairing mould, often layer thickness and every layer can be obtained, these data are exported.
C, the reparation of increasing material, the data obtained according to step b, successively weld by the mode of arc surfacing the imitated structure obtaining target die cavity.Successively welding refers to that wlding molten metal has certain thickness by the mode of welding at bottom welding, forms ground floor, then welds the second layer, third layer successively thereon ... until complete.Before welding, need mold integral to heat to 350 DEG C ~ 400 DEG C and be incubated, welding rod is heated to 300 DEG C ~ 350 DEG C and is incubated a period of time, after every one deck welding, needs to remove welding slag, checks whether defectiveness, weld complete, carry out temper.
D, accurately repair, accurately repairing has two kinds of modes, and a kind of is reserved allowance for just, when namely reserved allowance is 0.5mm ~ 1mm, needs this allowance to remove, can remove excess metal by refine, and sanding and polishing.And be negative situation for reserved allowance, namely reserved allowance is-1mm ~-0.2mm, needs to continue to adopt to increase material processing, namely by the mode of thermal spraying, mold cavity is machined to target die cavity, and sanding and polishing.
In above-mentioned steps c, when every one deck welding, the track of welding is scroll, welds from the edge of die cavity, terminates to centre position, gapless between adjacent weld seam, is a tabular after every one deck welding.
As another kind of embodiment, can alternately weld, namely in step c by adjacent layer, when every one deck welding, the track of welding is scroll, welds from the edge of die cavity, terminates to centre position, gap is left between adjacent weld seam, the width in this gap is 0.5 times of weld width, and adjacent layer is interlaced, namely forms the groove of a scroll after every one deck welding, and track when welding is this scroll next time, thus again form the groove of a scroll.Time larger for throat thickness, process velocity can be accelerated.
For the present embodiment, in step c, the thickness of weld seam (vestige namely formed after welding) is 1mm, and the width of weld seam is 1.5mm.
Present invention employs 3D printing technique, fast pocket machining can be become the shape approximate with target die cavity, and then process further, compared to existing technology, decrease wlding consumption, for steering knuckle forging mould, can reduce and use wlding 40% ~ 50%, and die life promotes 30% ~ 40%, successful.This welding process is carried out according to after the data automated programming of step b by welding robot, and welding is reliable, improves the operating efficiency of mould repair.
Finally should be noted that; above embodiment is only in order to illustrate technical scheme of the present invention; but not limiting the scope of the invention; although done to explain to the present invention with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to technical scheme of the present invention or equivalent replacement, and not depart from essence and the scope of technical solution of the present invention.

Claims (8)

1. forging die 3D prints and increases material welding and restoring process, it is characterized in that: comprise the steps:
A, cleaning die cavity, remove the fatigue layer in mold cavity to be repaired, crackle, cleaning impurity;
B, scanning modeling, mold cavity is scanned and sets up threedimensional model, data processing is carried out to this threedimensional model, after reserved allowance, obtain this mold cavity being carried out increase material and repair the number of plies, the often layer thickness of required processing and the shape of every layer, these data are exported;
C, the reparation of increasing material, the data obtained according to step b, successively weld by the mode of arc surfacing the imitated structure obtaining target die cavity;
D, accurately to repair, be positive mold cavity for machining allowance, remove excess metal by refine, and sanding and polishing; For the mold cavity that machining allowance is negative, by the mode of thermal spraying, mold cavity is machined to target die cavity, and sanding and polishing.
2. forging die 3D according to claim 1 prints and increases material welding and restoring process, it is characterized in that: in step a, and the thickness removing fatigue layer in mold cavity is 8mm ~ 10mm, and carries out detecting whether have crackle.
3. forging die 3D according to claim 1 prints and increases material welding and restoring process, it is characterized in that: in step b, reserved allowance is timing, and reserved allowance is 0.5mm ~ 1mm, reserved allowance is for time negative, and reserved allowance is-1mm ~-0.2mm.
4. forging die 3D according to claim 1 prints and increases material welding and restoring process, it is characterized in that: in step c, and when every one deck welding, the track of welding is scroll, welds from the edge of die cavity, terminates to centre position, gapless between adjacent weld seam.
5. forging die 3D according to claim 1 prints and increases material welding and restoring process, it is characterized in that: in step c, when every one deck welding, the track of welding is scroll, welding, from the edge of die cavity, terminates to centre position, leaves gap between adjacent weld seam, the width in this gap is 0.5 times of weld width, and adjacent layer is interlaced.
6. the forging die 3D according to claim 4 or 5 prints and increases material welding and restoring process, and it is characterized in that: in step c, the thickness of weld seam is 1mm, and the width of weld seam is 1.5mm.
7. forging die 3D according to claim 6 prints and increases material welding and restoring process, it is characterized in that: in step c, after welding, mould is carried out temper.
8. forging die 3D according to claim 2 prints and increases material welding and restoring process, it is characterized in that: in step a, adopts carbon arc air gouging technique to remove fatigue layer, crackle.
CN201510911896.3A 2015-12-11 2015-12-11 Forging die 3D printing increases material welding and restoring process Active CN105478764B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510911896.3A CN105478764B (en) 2015-12-11 2015-12-11 Forging die 3D printing increases material welding and restoring process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510911896.3A CN105478764B (en) 2015-12-11 2015-12-11 Forging die 3D printing increases material welding and restoring process

Publications (2)

Publication Number Publication Date
CN105478764A true CN105478764A (en) 2016-04-13
CN105478764B CN105478764B (en) 2018-08-14

Family

ID=55666231

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510911896.3A Active CN105478764B (en) 2015-12-11 2015-12-11 Forging die 3D printing increases material welding and restoring process

Country Status (1)

Country Link
CN (1) CN105478764B (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106881509A (en) * 2017-03-20 2017-06-23 南昌大学 A kind of 3D printing method for increasing material and spark-erosion sinking based on ultra-sonic welded
CN108339984A (en) * 2018-04-28 2018-07-31 攀钢集团攀枝花钢铁研究院有限公司 The method of forge piece surface growth labyrinth based on silk material 3D printing
CN108889945A (en) * 2018-07-25 2018-11-27 哈尔滨工业大学 A kind of inner wall laser increasing material manufacturing method of hollow structure
CN108971901A (en) * 2018-08-15 2018-12-11 哈尔滨电机厂有限责任公司 A kind of impact type waterturbine wheel repairing reproduction method
CN109746453A (en) * 2019-01-21 2019-05-14 沈阳精合数控科技开发有限公司 A kind of laser repair method and device
CN110899707A (en) * 2019-11-22 2020-03-24 武汉理工大学 Powder shape-following volume material increase method for remanufacturing hot forging die and application thereof
CN110969693A (en) * 2018-09-30 2020-04-07 天津理工大学 Method for obtaining forging die defect position model
CN111235380A (en) * 2020-02-24 2020-06-05 广州民航职业技术学院 Control method for surface layer characteristic parameter gradient during damaged metal component repair
CN111251605A (en) * 2018-11-30 2020-06-09 鑫精合激光科技发展（北京）有限公司 Three-dimensional printing seaming method and structure thereof
CN113043618A (en) * 2021-03-25 2021-06-29 共享装备股份有限公司 Assembling method of FDM printing product
CN114523258A (en) * 2020-11-23 2022-05-24 华域皮尔博格有色零部件(上海)有限公司 Repairing method for damaged area of cold thin wall of die casting die

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1043347A (en) * 1988-12-07 1990-06-27 王朝林 The processing method of repairing metallic mould of enamelled ceramic brick by thermal spraying coating
JPH0641606A (en) * 1991-08-22 1994-02-15 Mitsubishi Materials Corp Production of movable scroll for compressor
CN1587439A (en) * 2004-07-15 2005-03-02 上海交通大学 Method for preparing high temperature functional gradiet material by electronic beam smelting of refractory metal powder
CN1701907A (en) * 2005-05-25 2005-11-30 湖北三环锻造有限公司 Thin layer welding repair technology for forging die cavity
JP4121427B2 (en) * 2003-07-25 2008-07-23 本田技研工業株式会社 Sliding contact member and manufacturing method thereof
CN104227313A (en) * 2014-09-03 2014-12-24 广州民航职业技术学院 Method and device for repairing corrosion damage parts
CN104385640A (en) * 2014-10-20 2015-03-04 合肥斯科尔智能科技有限公司 High-precision repairing method for three-dimensional printed product
CN104401016A (en) * 2014-10-20 2015-03-11 合肥斯科尔智能科技有限公司 Method for repairing degraded product through three-dimensional printing
CN105127421A (en) * 2015-09-01 2015-12-09 广东工业大学 Laser 3D printing repair method of damaged gear tooth surface

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1043347A (en) * 1988-12-07 1990-06-27 王朝林 The processing method of repairing metallic mould of enamelled ceramic brick by thermal spraying coating
JPH0641606A (en) * 1991-08-22 1994-02-15 Mitsubishi Materials Corp Production of movable scroll for compressor
JP4121427B2 (en) * 2003-07-25 2008-07-23 本田技研工業株式会社 Sliding contact member and manufacturing method thereof
CN1587439A (en) * 2004-07-15 2005-03-02 上海交通大学 Method for preparing high temperature functional gradiet material by electronic beam smelting of refractory metal powder
CN1701907A (en) * 2005-05-25 2005-11-30 湖北三环锻造有限公司 Thin layer welding repair technology for forging die cavity
CN104227313A (en) * 2014-09-03 2014-12-24 广州民航职业技术学院 Method and device for repairing corrosion damage parts
CN104385640A (en) * 2014-10-20 2015-03-04 合肥斯科尔智能科技有限公司 High-precision repairing method for three-dimensional printed product
CN104401016A (en) * 2014-10-20 2015-03-11 合肥斯科尔智能科技有限公司 Method for repairing degraded product through three-dimensional printing
CN105127421A (en) * 2015-09-01 2015-12-09 广东工业大学 Laser 3D printing repair method of damaged gear tooth surface

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106881509A (en) * 2017-03-20 2017-06-23 南昌大学 A kind of 3D printing method for increasing material and spark-erosion sinking based on ultra-sonic welded
CN108339984A (en) * 2018-04-28 2018-07-31 攀钢集团攀枝花钢铁研究院有限公司 The method of forge piece surface growth labyrinth based on silk material 3D printing
CN108889945A (en) * 2018-07-25 2018-11-27 哈尔滨工业大学 A kind of inner wall laser increasing material manufacturing method of hollow structure
CN108971901A (en) * 2018-08-15 2018-12-11 哈尔滨电机厂有限责任公司 A kind of impact type waterturbine wheel repairing reproduction method
CN110969693A (en) * 2018-09-30 2020-04-07 天津理工大学 Method for obtaining forging die defect position model
CN111251605A (en) * 2018-11-30 2020-06-09 鑫精合激光科技发展（北京）有限公司 Three-dimensional printing seaming method and structure thereof
CN109746453A (en) * 2019-01-21 2019-05-14 沈阳精合数控科技开发有限公司 A kind of laser repair method and device
CN110899707A (en) * 2019-11-22 2020-03-24 武汉理工大学 Powder shape-following volume material increase method for remanufacturing hot forging die and application thereof
CN111235380A (en) * 2020-02-24 2020-06-05 广州民航职业技术学院 Control method for surface layer characteristic parameter gradient during damaged metal component repair
CN114523258A (en) * 2020-11-23 2022-05-24 华域皮尔博格有色零部件(上海)有限公司 Repairing method for damaged area of cold thin wall of die casting die
CN113043618A (en) * 2021-03-25 2021-06-29 共享装备股份有限公司 Assembling method of FDM printing product

Also Published As

Publication number Publication date
CN105478764B (en) 2018-08-14

Similar Documents

Publication Publication Date Title
CN105478764A (en) Welding repair technology of forging die 3D printing material increase
CN102500733B (en) Forging method for efficiently healing internal hole-type defects of steel ingot
CN109014518B (en) Welding device and repairing process for train wheel die holder
CN106077901A (en) Electric arc based on hot-work die failure site increases material manufacture method
CN106425275A (en) Repair method of cold-rolled support roller
CN101279417A (en) Method for manufacturing heavy type mining gipsy sheave
CN103659201A (en) Machining technology of turbine blade with water corrosion prevention achieved by means of laser cladding
CN112809311A (en) Method for repairing and remanufacturing forging-grade parts, terminal and medium
CN104815936A (en) Forge forming method and special mold for fork type pieces such as high reinforcing bars and thin web plates
CN1701907A (en) Thin layer welding repair technology for forging die cavity
CN106826090B (en) Build-up welding preparation process for connecting rod mold
CN103357805A (en) Method for forging formation of pin track
CN104607863A (en) Iron casting mold repair welding method
CN105171345A (en) Preparation method for high-wear-resistance and repairable conical double cylinders
CN111716078A (en) Plasma welding method for straight seam of thin-wall cylindrical steel shell
CN103878280A (en) Forging method of ultrahigh strength aluminum alloy
CN104889704A (en) Automobile front axle trim die manufacturing method
CN103240576B (en) A kind of split quenching pattern processing method
CN102198555B (en) Surfacing compound manufacturing method for manufacturing ejector for oxygen bottle
CN204397178U (en) A kind of iron weld repair structure
CN110919215A (en) Die welding process
CN104190814A (en) Hot die pressing method for high-quality hydraulic turbine blade
CN104191179A (en) Process for quickly forming double-hook lifting hooks of cranes by means of die forging
CN107671501A (en) A kind of production technology of planet carrier
CN202762810U (en) Trimming deflashing mould for repairing welding cutting edge

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant