CN106312437A - Equal-diameter recovery technique for mandrel - Google Patents
Equal-diameter recovery technique for mandrel Download PDFInfo
- Publication number
- CN106312437A CN106312437A CN201510368790.3A CN201510368790A CN106312437A CN 106312437 A CN106312437 A CN 106312437A CN 201510368790 A CN201510368790 A CN 201510368790A CN 106312437 A CN106312437 A CN 106312437A
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- Prior art keywords
- plug
- mandrel
- cooling
- temperature
- camber
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- 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
- B23P6/00—Restoring or reconditioning objects
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses an equal-diameter recovery technique for a mandrel and belongs to the technical field of mandrel machining. The equal-diameter recovery technique for the mandrel comprises the following steps that all parameters, for example, the degree of curvature and surface cracks, of the mandrel are detected; the mandrel to be recovered is recovered; the mandrel is subjected to annealing, and the temperature is controlled to be 650-750 DEG C and kept for 6-8 hours; the degree of curvature of the mandrel is adjusted through a device, specifically, the degree of curvature is controlled to be within 4mm; the cracks in the surface of the mandrel are treated, surfacing is carried out through gas submerged-arc welding, and the temperature is controlled to be 120-150 DEG C; after surfacing is completed, the temperature is controlled to be 680-800 DEG C and kept for 6-8 hours; the mandrel is subjected to annealing treatment, the temperature is controlled to be 650-750 DEG C and kept for 6-8 hours; and after heat preservation is completed, the mandrel is taken out and subjected to cooling treatment, and the mandrel is detected after reaching the normal temperature. The equal-diameter recovery technique for the mandrel is reasonable in design, low in cost, high in machining efficiency, stable in machining quality and capable of prolonging the service life of the mandrel.
Description
Technical field:
The present invention relates to plug processing technique field, be specifically related to the isometrical renovation technique of plug.
Background technology:
Plug be at pressing direction in pressed compact or the portion of the mould of sintered body internal shaping contoured surface
Part；Plug is one of main tool participating in steel pipe rolling deformation, the temperature that hot-rolled pipe plug runs into
Spend higher, to bear the highest axial tensile stress simultaneously and radially answer pressure, it addition, plug is instead
It is in a non-stable temperature field during multiple use, needs to bear the temperature of the circulation that colds and heat succeed each other
Change and thermal wear, therefore, the highest with surface quality requirements to the performance of plug, plug is the most right
The quality of drawn and rolled tube has a major impact, and as high level easily-consumed products, the service life pair of plug
Tubing production cost also plays a decisive role.
The factor affecting the plug life-span is a lot, as the material of steel, heat processing technique, cold machining process,
Technology for Heating Processing, use environment, structure and process system, the keeping maintenance etc. of plug；Plug loses
The main performance of effect is heat exhaustion, viscous erosion, corrode, deforms, ftractures and subside；Thermal fatigue cracking
Be hot-working mould be the most also the most extreme damage type, under periodicity thermodynamic activity, heat
The generation of crackle in the course of processing, to propagate and expand be the most serious.
In sum, it was therefore concluded that, in order to extend the service life of plug, improve production efficiency,
Reducing cost, the reparation to plug is imperative；Certainly, prior art there is also
Simple repairing method, but precision is inadequate, with the differing greatly of primary products after reparation, it is impossible to
Meet Production requirement.
Summary of the invention:
For the problems referred to above, the technical problem to be solved in the present invention be to provide a kind of technological design rationally,
Low cost, working (machining) efficiency be high and the stay-in-grade isometrical renovation technique of plug.
The isometrical renovation technique of plug of the present invention, it comprises the steps of: 1, detect all of plug
Parameter: camber, face crack, camber product in 5mm is certified products, if more than this number
Value needs are corrected；The crack depth product less than 10mm can be corrected, more than this number
The product of value is then scrap；
2, plug to be repaired is repaired:
A, annealing plug, temperature controls between 650-750 DEG C, and is incubated 6-8 hour；
After B, insulation, by the type of cooling, plug cooling is processed；Treat near 400-550 DEG C of temperature
Time can be taken off plug；
C, being adjusted the camber of plug by equipment, camber controls in 4mm；
D, regulate camber after, plug is sent in stove, sizing of heating, temperature controls
400-550 DEG C, and it is incubated 3-4 hour；
After E, good heat insulation, take out plug, natural cooling；
F, slight crack to mandrel surface process, and by gas submerged arc bead welding, temperature controls
120-150℃；
After G, built-up welding complete, temperature controls at 680-800 DEG C, is incubated 6-8 hour；
After H, insulation, taking out plug, and the plating zinc on surface to plug, thickness is 0.05-0.08mm,
Hardness is 55-65；
I, to plug make annealing treatment, temperature controls at 650-750 DEG C, is incubated 6-8 hour；
After J, insulation, taking out plug, cooling processes, and it is detected after reaching room temperature by plug；
3, repair after intact plug need to place a period of time and can use.
As preferably, the described type of cooling in step B is quickly to be cooled down by coolant.
As preferably, it is to add the common of coolant by blower fan that the cooling in described step J processes
Cooling.
Beneficial effects of the present invention: its technological design is reasonable, low cost, working (machining) efficiency are high and quality
Stable, the service life of plug can be extended.
Detailed description of the invention:
This detailed description of the invention is by the following technical solutions: it comprises the steps of:
1, all parameters of plug are detected: camber, face crack, camber product in 5mm is
Certified products, if needing to be corrected more than this numerical value；The crack depth product less than 10mm is permissible
It is corrected, is then scrap more than the product of this numerical value；
2, plug to be repaired is repaired:
A, annealing plug, temperature controls between 650-750 DEG C, and is incubated 6-8 hour；
After B, insulation, by the type of cooling, plug cooling is processed；Treat near 400-550 DEG C of temperature
Time can be taken off plug；
C, being adjusted the camber of plug by equipment, camber controls in 4mm；
D, regulate camber after, plug is sent in stove, sizing of heating, temperature controls
400-550 DEG C, and it is incubated 3-4 hour；
After E, good heat insulation, take out plug, natural cooling；
F, slight crack to mandrel surface process, and by gas submerged arc bead welding, temperature controls
120-150℃；
After G, built-up welding complete, temperature controls at 680-800 DEG C, is incubated 6-8 hour；
After H, insulation, taking out plug, and the plating zinc on surface to plug, thickness is 0.05-0.08mm,
Hardness is 55-65；
I, to plug make annealing treatment, temperature controls at 650-750 DEG C, is incubated 6-8 hour；
After J, insulation, taking out plug, cooling processes, and it is detected after reaching room temperature by plug；
3, repair after intact plug need to place a period of time and can use.
Wherein, the described type of cooling in step B is quickly to be cooled down by coolant.
Cooling in described step J processes the common cooling being to be added coolant by blower fan.
The technological design of this detailed description of the invention is reasonable, low cost, working (machining) efficiency are high and steady quality,
The service life of plug can be extended.
The ultimate principle of the present invention and principal character and the present invention excellent has more than been shown and described
Point.Skilled person will appreciate that of the industry, the present invention is not restricted to the described embodiments, above-mentioned
The principle that the present invention is simply described described in embodiment and description, without departing from present invention spirit
On the premise of scope, the present invention also has various changes and modifications, and these changes and improvements all fall
Enter in scope of the claimed invention.Claimed scope is by appending claims
And equivalent defines.
Claims (3)
1. the isometrical renovation technique of plug, it is characterised in that it comprises the steps of:
(1), all parameters of detection plug: camber, face crack, camber product in 5mm
For certified products, need to be corrected if being more than this numerical value；The crack depth product less than 10mm can
To be corrected, it is then scrap more than the product of this numerical value；
(2), plug to be repaired is repaired:
(A), annealing plug, temperature controls between 650-750 DEG C, and it is little to be incubated 6-8
Time；
(B), after insulation, by the type of cooling, plug cooling is processed；Treat near 400-550 DEG C of temperature
Time can be taken off plug；
(C), being adjusted the camber of plug by equipment, camber controls in 4mm；
(D), regulate camber after, plug is sent in stove, sizing of heating, temperature controls
400-550 DEG C, and it is incubated 3-4 hour；
(E), after good heat insulation, plug, natural cooling are taken out；
(F), the slight crack of mandrel surface is processed, by gas submerged arc bead welding, temperature control
At 120-150 DEG C；
(G), after built-up welding completes, temperature controls at 680-800 DEG C, is incubated 6-8 hour；
(H), after insulation, taking out plug, and the plating zinc on surface to plug, thickness is 0.05-0.08mm,
Hardness is 55-65；
(I), making annealing treatment plug, temperature controls at 650-750 DEG C, is incubated 6-8 hour；
(J), insulation after, take out plug, cooling process, it is detected after reaching room temperature by plug；
(3), repair after intact plug need to place a period of time and can use.
The isometrical renovation technique of plug the most according to claim 1, it is characterised in that described step
The type of cooling in rapid B is quickly to be cooled down by coolant.
The isometrical renovation technique of plug the most according to claim 1, it is characterised in that described step
Cooling in rapid J processes the common cooling being to be added coolant by blower fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510368790.3A CN106312437A (en) | 2015-06-29 | 2015-06-29 | Equal-diameter recovery technique for mandrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510368790.3A CN106312437A (en) | 2015-06-29 | 2015-06-29 | Equal-diameter recovery technique for mandrel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106312437A true CN106312437A (en) | 2017-01-11 |
Family
ID=57721618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510368790.3A Pending CN106312437A (en) | 2015-06-29 | 2015-06-29 | Equal-diameter recovery technique for mandrel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106312437A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108994419A (en) * | 2018-08-20 | 2018-12-14 | 江苏科技大学 | A kind of pecker composite overlaying manufacturing method |
| CN109277724A (en) * | 2018-11-09 | 2019-01-29 | 鞍钢股份有限公司 | Gas-shielded welding wire for local repair of core rod and welding process |
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|---|---|---|---|---|
| CN101821489A (en) * | 2008-02-14 | 2010-09-01 | 三菱重工业株式会社 | Method for repairing turbine rotor blade |
| CN101829879A (en) * | 2010-04-15 | 2010-09-15 | 张子益 | Method for restoring roll body of steel casting roll of twin-roll strip casting |
| CN102091719A (en) * | 2010-12-07 | 2011-06-15 | 宝钢集团常州轧辊制造公司 | Limiting mandrel for mandrel pipe mill and manufacturing method thereof |
| CN102581542A (en) * | 2012-02-07 | 2012-07-18 | 梅河口市弘业无缝钢管有限公司 | Waste and old oil well pipe performance recovery process |
| EP2698223A2 (en) * | 2012-08-13 | 2014-02-19 | General Electric Company | A process of welding to repair thick sections using two arcwelding devices and a laser device; corresponding welding apparatus |
| CN103846610A (en) * | 2012-12-05 | 2014-06-11 | 江苏南山冶金机械制造有限公司 | Core rod isometric restoration process |
-
2015
- 2015-06-29 CN CN201510368790.3A patent/CN106312437A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101821489A (en) * | 2008-02-14 | 2010-09-01 | 三菱重工业株式会社 | Method for repairing turbine rotor blade |
| CN101829879A (en) * | 2010-04-15 | 2010-09-15 | 张子益 | Method for restoring roll body of steel casting roll of twin-roll strip casting |
| CN102091719A (en) * | 2010-12-07 | 2011-06-15 | 宝钢集团常州轧辊制造公司 | Limiting mandrel for mandrel pipe mill and manufacturing method thereof |
| CN102581542A (en) * | 2012-02-07 | 2012-07-18 | 梅河口市弘业无缝钢管有限公司 | Waste and old oil well pipe performance recovery process |
| EP2698223A2 (en) * | 2012-08-13 | 2014-02-19 | General Electric Company | A process of welding to repair thick sections using two arcwelding devices and a laser device; corresponding welding apparatus |
| CN103846610A (en) * | 2012-12-05 | 2014-06-11 | 江苏南山冶金机械制造有限公司 | Core rod isometric restoration process |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108994419A (en) * | 2018-08-20 | 2018-12-14 | 江苏科技大学 | A kind of pecker composite overlaying manufacturing method |
| CN109277724A (en) * | 2018-11-09 | 2019-01-29 | 鞍钢股份有限公司 | Gas-shielded welding wire for local repair of core rod and welding process |
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Application publication date: 20170111 |
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