CN103990940A - Machining method of forge piece water pump middle section - Google Patents
Machining method of forge piece water pump middle section Download PDFInfo
- Publication number
- CN103990940A CN103990940A CN201410160889.XA CN201410160889A CN103990940A CN 103990940 A CN103990940 A CN 103990940A CN 201410160889 A CN201410160889 A CN 201410160889A CN 103990940 A CN103990940 A CN 103990940A
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- China
- Prior art keywords
- forging
- workpiece
- water pump
- heat treatment
- improved
- 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.)
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Classifications
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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
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
The invention relates to the technical field of water pump manufacturing industries, in particular to a machining method of a water pump middle section. According to the technical scheme, the method comprises the steps that A forging is carried out, wherein (1) blanking, (2) heat treatment, (3) prepressing, (4) forging and pressing, (5) pushing out and (6) cooling are included; and B turning is carried out. The method has the advantages that air holes, sand holes and damage caused by the holes are reduced; the mechanical property of metal is improved, and the internal structure of the metal is improved; labor productivity is improved; precision die forging is used, so the forge piece size is proper, and waste during cutting machining is lowered; and crystalline grains are relatively small, even, compact and suitable for following mechanical cutting machining, organization preparation is achieved for final heat treatment, and part using performance can be well improved.
Description
Technical field
The present invention relates to water pump manufacturing industry technical field, specifically refer to the processing method in a kind of forging water pump stage casing.
Background technology
At present, known water pump stage casing forms by casting, and a large amount of pores, sand holes are loosened, had to interior tissue, easy to wear; Interior tissue is not fine and close, Density inhomogeneity, and cutting causes tool damage often; And surplus is larger when machining, waste material is more; Poor sealing, reveals.Fig. 1,2 is shown in the metallographic structure of cast member, and it is organized as ferrite and adds pearlite, and part ferrite is needle-like, has Widmannstatten structure feature, be overheated structure form, and as cast condition dendritic structure Crystallization Characteristics is more obvious.It is as follows that existing stainless cast steel part mechanical property detects data: tensile strength Rm is 392 to 588MPa; Lower yield strength ReL is 177 to 392MPa; Percentage elongation A5 is 25 to 35%; Contraction percentage of area Z is 30 to 40%; Ballistic work AKv >=40J.
At present, known water pump stage casing adopts casting, and product shortcoming is have pore and sand holes, is unfavorable for the follow-up machining of part, is unfavorable for the raising of part serviceability, easily reveals seepage.
Summary of the invention
The object of the invention is to overcome the shortcoming of prior art, and create the processing method in a kind of forging water pump stage casing.
The present invention is achieved through the following technical solutions, A forges: 1.. blanking, 2.. heat treatment, heat 5 to 7 hours, and temperature reaches 1000 ℃ to 1300 ℃, workpiece internal and external equilibrium is heated, 3.. precompressed, workpiece after heat treatment is put into the bed die of forging press, leaving heating furnace must not be over 20 second, adjust workpiece, make it entirely be positioned in the middle of mould, forging press master cylinder presses down, pressure reaches 26MPa, keep 5 to 8 seconds, the gabarit moulding of workpiece, 4.. forging and stamping, master cylinder backhaul, load a die, master cylinder presses down again, pressure reaches 26MPa, keep 5 to 8 seconds, the interior wide moulding of workpiece, complete processing, 5.. eject, the piston of taking blame for others ejects rail wheel in bed die, complete processing, the piston of taking blame for others is return, 6.. cooling, B turning: 1.. car inside and outside circle is to surface accuracy requirement, 2.. and milling limit completes processing.
Machine rear property indices as follows: tensile strength Rm >=600MPa; Lower yield strength ReL >=300MPa; Percentage elongation A5 >=20%; Contraction percentage of area Z >=50%; Ballistic work AKv >=70J.
Tool of the present invention has the following advantages, the harm that has 1. reduced pore and sand holes and caused.2. improve the mechanical property of metal, improved the interior tissue of metal.3. improved labor productivity.4. adopt precision die forging, make forging ' s block dimension, shape approach finished product, the use that therefore can save metal material, the waste while reducing machining.5. relatively tiny, the even compact of its crystal grain, does not have the common casting As rolled tissue defects such as composition segregation, banded segregation, is normalized structure after typical forging.This tissue is applicable to follow-up machine cut processing, and for final heat treatment, has carried out tissue and prepared, and is conducive to the raising of part serviceability.
Accompanying drawing explanation
Accompanying drawing 1 is prior art metallograph.
Accompanying drawing 2 is that accompanying drawing 1 amplifies 5 times of schematic diagrames.
Accompanying drawing 3 is metallograph of the present invention.
Accompanying drawing 4 is that accompanying drawing 3 amplifies 5 times of schematic diagrames.
Accompanying drawing 5 forges base substrate figure for the present invention.
Accompanying drawing 6 is rough turn machine-shaping schematic diagram.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention, shown in accompanying drawing 3 to 6.
The present invention is achieved through the following technical solutions, A forges: 1.. blanking, 2.. heat treatment, heat 5 to 7 hours, and temperature reaches 1000 ℃ to 1300 ℃, workpiece internal and external equilibrium is heated, 3.. precompressed, workpiece after heat treatment is put into the bed die of forging press, leaving heating furnace must not be over 20 second, adjust workpiece, make it entirely be positioned in the middle of mould, forging press master cylinder presses down, pressure reaches 26MPa, keep 5 to 8 seconds, the gabarit moulding of workpiece, 4.. forging and stamping, master cylinder backhaul, load a die, master cylinder presses down again, pressure reaches 26MPa, keep 5 to 8 seconds, the interior wide moulding of workpiece, complete processing, 5.. eject, the piston of taking blame for others ejects rail wheel in bed die, complete processing, the piston of taking blame for others is return, 6.. cooling, B turning: 1.. car inside and outside circle is to surface accuracy requirement, 2.. and milling limit completes processing.
Fig. 3,4 is shown in the metallographic structure of forge piece, and it is organized as ferrite and adds pearlite, and its crystal grain is relatively tiny, even compact, does not see common casting As rolled tissue defects such as having composition segregation, banded segregation, is the typical rear normalized structure of forging.This tissue is applicable to follow-up machine cut processing, and for final heat treatment, has carried out tissue and prepared, and is conducive to the raising of part serviceability.
Machine rear property indices as follows: tensile strength Rm >=600MPa; Lower yield strength ReL >=300MPa; Percentage elongation A5 >=20%; Contraction percentage of area Z >=50%; Ballistic work AKv >=70J.
Claims (2)
1. the processing method in forging water pump stage casing, is characterized in that comprising following production stage:
A forges:
1.. material;
2.. heat treatment, heat 5 to 7 hours, and temperature reaches 1000 ℃ to 1300 ℃, workpiece internal and external equilibrium is heated;
3.. precompressed, the workpiece after heat treatment is put into the bed die of forging press, and leaving heating furnace must not surpass 20 seconds, adjusts workpiece, and it is entirely positioned in the middle of mould, and forging press master cylinder presses down, and pressure reaches 26MPa, keeps the gabarit moulding of workpiece 5 to 8 seconds;
4.. forging and stamping, master cylinder backhaul, loads a die, and master cylinder presses down again, and pressure reaches 26MPa, keeps 5 to 8 seconds, and the interior wide moulding of workpiece, completes processing;
5.. eject, the piston of taking blame for others ejects rail wheel in bed die, completes processing, and the piston of taking blame for others is return;
6.. cooling;
B turning:
1.. car inside and outside circle is to surface accuracy requirement;
2.. milling limit completes processing.
2. according to the processing method in a kind of forging water pump claimed in claim 1 stage casing, it is characterized in that:
Tensile strength Rm >=600MPa;
Lower yield strength ReL >=300MPa;
Percentage elongation A5 >=20%;
Contraction percentage of area Z >=50%;
Ballistic work AKv >=70J.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410160889.XA CN103990940A (en) | 2014-04-22 | 2014-04-22 | Machining method of forge piece water pump middle section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410160889.XA CN103990940A (en) | 2014-04-22 | 2014-04-22 | Machining method of forge piece water pump middle section |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103990940A true CN103990940A (en) | 2014-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201410160889.XA Pending CN103990940A (en) | 2014-04-22 | 2014-04-22 | Machining method of forge piece water pump middle section |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103990941A (en) * | 2014-04-22 | 2014-08-20 | 湖南千跃机械制造有限公司 | Machining method of forge piece jaw base |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1036354A (en) * | 1988-12-15 | 1989-10-18 | 江西省地质矿产局地质建设工程大队 | The method and the device of the amalgamation of automobile axle shaft friction welding (FW) |
| CN1807009A (en) * | 2006-02-21 | 2006-07-26 | 国营重庆重型铸锻厂 | Method for forging combined forged steel coupler yoke for railway vehicles |
| CN102248381A (en) * | 2011-07-08 | 2011-11-23 | 应华生 | Method for processing lathe spindle |
| CN103111572A (en) * | 2013-02-02 | 2013-05-22 | 湖南千跃机械制造有限公司 | Rail wheel forging machine and production method of rail wheels |
| CN103990941A (en) * | 2014-04-22 | 2014-08-20 | 湖南千跃机械制造有限公司 | Machining method of forge piece jaw base |
| CN104070126A (en) * | 2014-04-22 | 2014-10-01 | 湖南千跃机械制造有限公司 | Forging jaw machining method |
-
2014
- 2014-04-22 CN CN201410160889.XA patent/CN103990940A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1036354A (en) * | 1988-12-15 | 1989-10-18 | 江西省地质矿产局地质建设工程大队 | The method and the device of the amalgamation of automobile axle shaft friction welding (FW) |
| CN1807009A (en) * | 2006-02-21 | 2006-07-26 | 国营重庆重型铸锻厂 | Method for forging combined forged steel coupler yoke for railway vehicles |
| CN102248381A (en) * | 2011-07-08 | 2011-11-23 | 应华生 | Method for processing lathe spindle |
| CN103111572A (en) * | 2013-02-02 | 2013-05-22 | 湖南千跃机械制造有限公司 | Rail wheel forging machine and production method of rail wheels |
| CN103990941A (en) * | 2014-04-22 | 2014-08-20 | 湖南千跃机械制造有限公司 | Machining method of forge piece jaw base |
| CN104070126A (en) * | 2014-04-22 | 2014-10-01 | 湖南千跃机械制造有限公司 | Forging jaw machining method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103990941A (en) * | 2014-04-22 | 2014-08-20 | 湖南千跃机械制造有限公司 | Machining method of forge piece jaw base |
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Application publication date: 20140820 |