CN101808762B - Method for producing hollow forged parts and parts thus obtained - Google Patents
Method for producing hollow forged parts and parts thus obtained Download PDFInfo
- Publication number
- CN101808762B CN101808762B CN200880107675.9A CN200880107675A CN101808762B CN 101808762 B CN101808762 B CN 101808762B CN 200880107675 A CN200880107675 A CN 200880107675A CN 101808762 B CN101808762 B CN 101808762B
- Authority
- CN
- China
- Prior art keywords
- core
- outlet pipe
- gas outlet
- pipe road
- method comprises
- 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.)
- Expired - Fee Related
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K21/00—Making hollow articles not covered by a single preceding sub-group
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/106—Vented or reinforced cores
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention relates to a method for producing hollow forged parts, that comprises the following steps: making a core of a lost material having a shape corresponding to the internal shape of the part to be obtained except for deformation during forging, positioning the core in a foundry mould, casting a metal around the core so as to completely surround the core in order to obtain a preform (18), sealing the preform (18) so that the core is completely isolated relative to the outside, forging the preform (18) in order to obtain the part having the desired shape, and decore the core of the part in order to obtain the hollow forged part.
Description
Technical field
The present invention relates to make through forging operation the technical field of metal parts.
Background technology
Object of the present invention is being made metal parts, during such as aluminum alloy part, found particularly advantageous application, for the manufacture of the part that is used for such as bicycle or automotive field, such as crossbeam, triangle hanger bracket, rotating shaft, driving member, electric machine support or various other with the connector on ground.
In the prior art, be known by the FMT finished parts.The method comprises the manufacturing ingot and is placed on after carrying out necessary heating between two engraving grooves of mould.By exerting pressure at these two engraving grooves relative to one another, make it distortion in the ingot acting, guarantee simultaneously the surface state that it is good.Such method can access the part with good mechanical strength (Static and dynamic) and keep geometric tolerances.
But this technology can only obtain integral body and thicker part, even the material that uses is light alloy.On same meaning, consider the price of raw material, the price of design of part material particularly, this just causes the price of part also higher.
In order to overcome such shortcoming, the material manufacturing core that document EP 0,850,825 proposition usefulness will be removed is to consist of the hollow space of bicycle pedal bent axle.This core is prolonged by holder part, and its effect is with the inside of stent support at mold, pours metal in this mold.Before final forging operation, the support of core part and define that the core part of receiving opening is split to be fallen.Even such technology can reduce the use amount of material, this technology does not provide satisfied result in practice yet, because it can not guarantee that core has good stability in forging process.This technology core part of must dismantling before forging operation is arranged again.Except the shortcoming that operation interrelates therewith, not get rid of the residue and residual of core and stay on the forging equipment, this can cause the defective of piece surface equally.
Summary of the invention
Therefore, purport of the present invention overcomes aforesaid shortcoming, proposes simultaneously a kind ofly can in the advantage of enjoying this part forging method, also obtain the part that low cost has been optimized weight.
Another object of the present invention is intended to propose a kind of method that can make the hollow forging part, and the feature of its size is perfectly controlled.
Another purpose of the present invention is intended to give a kind of method can be simply and with low cost fabrication hollow forging part, and do not have obvious blemish when it carries out forging operation.
In order to reach these purposes, be intended to make the hollow forging part according to method of the present invention.
Therefore, purpose of the present invention is intended to propose a kind of method of making the hollow cast member, and the method comprises the steps:
-make core with consumable material, its shape is equivalent to the shape of the inside parts that will obtain, and when forging, this shape is about to distortion,
-this core is located in mold,
-casting metals around core makes it to encase fully core, obtains ingot casting,
-sealing ingot is isolated core and outside fully,
-forge ingot casting, obtain the part of required form, and
-from part, remove core, to obtain the hollow forging part.
According to one of this manufacture method favourable feature, the method comprises the core that at least one gas outlet pipe road is housed.
The method advantageously comprises by means of this gas outlet pipe road and guarantees this core is located in mold.
According to an Implementation Modes, the method comprises the sealing that guarantees ingot casting by each root gas outlet pipe road of shutoff.
According to a preferred embodiment, the method comprises by means of the stiffener that is full of described pipeline comes each root gas outlet pipe road of shutoff.
The method preferably includes, and the gas outlet pipe road is positioned to be configured for the groove place of part in core.
According to an embodiment, the method comprises location, gas outlet pipe road, makes it outwards outstanding from the core two ends, to consist of horizontal slot part in this part.
According to an embodiment, the method comprises that the assurance ingot casting was preheated first before it forges.
Of the present invention another proposes the core that a kind of consumable material that is surrounded by metal is fully made on every side to liking, and the gas outlet pipe road opening of at least one this core inside of insertion therein.
This ingot casting preferably includes a closed rigidity shutoff element that is placed in each root gas outlet pipe road.
Another object of the present invention is after forging and removing core, obtains the hollow forging part from ingot casting.
A further object of the present invention is to obtain the hollow forging part that obtains according to the inventive method.
Description of drawings
By following narration, other feature will be clearer and more definite with reference to the accompanying drawings, and these accompanying drawings demonstrate the Implementation Modes as the object of the present invention of non-limiting example.
Fig. 1 is that the perspective view of cutting open by the part example that obtains according to manufacture method of the present invention is made in expression.
Fig. 2 explanation has a core of the part cut open in a step according to the inventive method.
Fig. 3 is the axis side view of cutting open that shows the core that the gas outlet pipe road is housed.
Fig. 4 explanation is as being placed on the situation in the mould at the core described in Fig. 3.
Fig. 5 is the axonometric projection graph of the ingot casting that obtains after material is flowing in the mould described in Fig. 4.
Fig. 6 explanation is after pouring operation, and its gas outlet pipe road is closed and the ingot casting that obtains.
Fig. 7 is therein will be at the view of the forging internal mold of the ingot casting described in Fig. 6 location.
The part that Fig. 8 explanation obtains after forging operation is cut the perspective view of a part open.
Fig. 9 illustrates that part that core wherein partly is perforated removes the perspective view of a part.
The specific embodiment
Object of the present invention is intended to guarantee to make hollow forging part 1.In the embodiment described in Fig. 1, part 1 is a beam that comprises arm body 2, has columniform head 3 at each end of arm.Each head 3 is provided with horizontal hole 4, in two relative side surface 5 upper sheds.In the embodiment of explanation, two holes 4 are along parallel to each other and perpendicular to the Axis Extension of the bearing of trend of arm 2.As in Fig. 1, clearly showing.Arm body 2 is hollow, and this moment, it comprised one at the slot part 7 of the hole of two heads 34 split sheds.
Part 1 obtains according to manufacture method of the present invention, and the method is intended to guarantee that the core to the consumable material manufacturing casts, and to obtain ingot casting, then it is carried out forging operation.
As in Fig. 2, clearly showing, comprise with consumable material manufacturing core 10 according to method of the present invention, the interior shape that is about to stand to be out of shape part 1 when carrying out forging operation subsequently that its profile is equivalent to obtain, this forging operation will be described in detail in the back.This core 10 can be according to various known methods by the consumable material manufacturing.Such as this core 10 are cores of being made by salt, by means of cooling or heating cabinet, i.e. the core made from sand of " crab process ".In the embodiment of explanation, this core is made of sand and resin.
According to the feature of a preferred implementation method, core 10 is full of.Certainly, can manufacture and design the core 10 with hollow feature.In the case, this core is suitable for having necessary mechanical strength when it carries out forging operation subsequently.In other words, core 10 is suitable for tolerating the external force that is loaded when carrying out forging operation.
According to a preferred embodiment, core 10 has at least one gas outlet pipe road 11.Among the embodiment that narrates in Fig. 3, core 10 has two gas outlet pipe roads 11.Each root gas outlet pipe road all is by forming such as the pipe 11 that has hole 12 and at least part of insert type core inner.Each root pipeline 11 stretches out outstanding from core 10.When casting, this pipeline 11 is used for gas discharging to the mould outside.The gas here can derive from the resin burning that consists of core 10 parts.On same meaning, according to a preferred embodiment, the outer surface of core 10 can by being endowed impermeability such as dipping, be discharged by pipeline 11 with forced gas.
According to the feature of a preferred implementation method, each gas outlet pipe road 11 is arranged in core 10 and is used for constituent part with hole 4 parts.In other words, each root pipeline 11 is placed and makes its symmetry axis and the axis coaxle of wherein placing the hole 4 of pipeline.
According to the feature of a preferred implementation method, when carrying out pouring operation, each root gas outlet pipe road 11 guarantees the location of core 10 in mould.In the embodiment of explanation, each root gas outlet pipe road 11 is outwards outstanding from the two ends of core, and is namely outstanding from side surface 5.
According to the present invention, the method comprises by means of traditional casting method and guarantees to cast at core 10.Because the operation of casting belongs to the part of the known technological know-how of those skilled in the art, thus just no longer explain, can be by no matter which kind of known foundry engieering carries out.
So, can clearly show in Fig. 4, core 10 is placed in the mould 15, has only described its inside in Fig. 4.The feature of embodiment following the instructions, gas outlet pipe road 11 play a part core 10 is positioned at mould 15 inside.This mould is various types of, can be sand mo(u)ld, metal mold or various other can make because the casting method of the prefabricated component that forges.
Therefore, the method comprises guarantee that metal flows around core 10, to encase core fully, obtains as at the ingot casting 18 described in Fig. 5.This pipeline when having gas outlet pipe road 11 to exist, this core 10 is completely encased.
Be intended to ingot casting 18 is sealed according to method of the present invention, so that the environment of 10 pairs of outsides of core is in the state that separates fully.In the illustrated embodiment, guarantee this sealing by block each root gas outlet pipe road 11 with the shutoff element 20 of all kinds (Fig. 6).This shutoff element 20 can be with various suitable method manufacturings, such as metal closures, plastic plug or ceramic plug.With such method, core 10 just can not contact with air.
According to the feature of a preferred implementation method, the method comprises by means of the shutoff element 20 that is full of this pipeline and blocks each root gas outlet pipe road 11.This element 20 can be such as the Metallic rod or the metal shaft that are full of each root gas outlet pipe road 11 fully.These elements can make each root gas outlet pipe road improve rigidity and sealing.
Then, comprise the forging that guarantees ingot casting 18 according to method of the present invention, to obtain the part of required form.
The operation of this forging can cold conditions or hot under carry out.In the situation that heats forged, ingot casting 18 is heated first, then is placed on as shown in FIG. 7 in the forge die 22.So this ingot casting 18 just is positioned between two forge dies of various known types.When carrying out this forging and pressing operation, the core 10 that always is present in the ingot casting 18 can guarantee back-pressure, to avoid near part avalanche slot part 7 when carrying out the hammering operation.So core 10 has just guaranteed suitable pressurization level, to obtain good mechanical property and mechanical strength.Should be noted that in core 10, have metal shaft 20 to have the mechanical strength that also helps core.
After forging operation, as shown in FIG. 8, from mould, take out part 1.If because forging operation makes part 1 have overlap 22, will remove this overlap 22 this moment.
Then, comprise according to method of the present invention guaranteeing from part 1, to dispose core 10, to obtain the forging parts of hollow.This clear operation can by means of various suitable means, such as realizing with brill, vibrations and/or heat treatment, can be removed whole cores 10.Such as, can design near head 3 and hole, just obtain hole 4 (Fig. 9), heat treatment then is used for taking out the core that is arranged in arm 2, to form slot part 7.After removing whole cores 10, just obtained hollow part 1 (Fig. 1).
As indicated in the narration in front, can access the forging parts of hollow according to method of the present invention.In the embodiment of explanation, this part 1 is a beam.Very clear, object of the present invention can be used for having various shapes, has the different parts of one or more grooves.
Claims (8)
1. the manufacture method of hollow forging part (1) is characterized in that, the method comprises the steps:
-make core (10) with consumable material, its shape is equivalent to the shape of the inside parts that will obtain, and when forging, this shape is about to distortion,
-this core (10) is located in mold,
-casting metals around core (10) makes it to encase fully core, obtains ingot casting (18),
-sealing ingot (18) is isolated core (10) and outside fully,
-forge ingot casting (18), obtain the part of required form, and
-from part, remove core (10), to obtain hollow forging part (1).
2. according to the method for claim 1, it is characterized in that, the method comprises to this core (10) loads onto at least one gas outlet pipe road (11).
3. according to the method for claim 2, it is characterized in that, the method comprises by means of this gas outlet pipe road (11) this core (10) is positioned in the mold.
4. according to the method for claim 2, it is characterized in that, the method comprises the sealing that guarantees ingot casting (18) by each root gas outlet pipe road (11) of shutoff.
5. according to the method for claim 4, it is characterized in that, the method comprises by means of the stiffener that is full of described pipeline (20) comes each root gas outlet pipe road (11) of shutoff.
6. according to one of in the claim 1～5 method, it is characterized in that, the method comprises that the groove (4) that the gas outlet pipe road (11) in core (10) is positioned at constituent part locates.
7. according to the method for claim 6, it is characterized in that, the method comprises gas outlet pipe road (11) location, makes it outwards outstanding from the core two ends, to consist of horizontal groove (4) in this part.
8. according to the method for claim 1, it is characterized in that, the method comprises and guaranteeing before ingot casting (18) is forged first with its preheating.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0757922A FR2921574B1 (en) | 2007-09-28 | 2007-09-28 | METHOD FOR MANUFACTURING HOLLOW FORGED PARTS AND PARTS THUS OBTAINED |
| FR0757922 | 2007-09-28 | ||
| PCT/FR2008/051720 WO2009050382A2 (en) | 2007-09-28 | 2008-09-26 | Method for producing hollow forged parts and parts thus obtained |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101808762A CN101808762A (en) | 2010-08-18 |
| CN101808762B true CN101808762B (en) | 2013-02-20 |
Family
ID=39321470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200880107675.9A Expired - Fee Related CN101808762B (en) | 2007-09-28 | 2008-09-26 | Method for producing hollow forged parts and parts thus obtained |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2197606B1 (en) |
| CN (1) | CN101808762B (en) |
| AT (1) | ATE525151T1 (en) |
| FR (1) | FR2921574B1 (en) |
| WO (1) | WO2009050382A2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2958193B1 (en) | 2010-04-06 | 2012-06-29 | Saint Jean Ind | PROCESS FOR MANUFACTURING LIGHT ALLOY FORGED PARTS INCORPORATING FULL OR DRAWN THICKNESS SECTIONS |
| FR2969516B1 (en) | 2010-12-23 | 2013-08-16 | Saint Jean Ind | PROCESS FOR THE PRODUCTION OF SALT CORE BY ISOSTATIC COMPACTION UILIZABLE IN FOUNDRY OR FOUNDRY-FORGING |
| CN106925720A (en) * | 2017-04-17 | 2017-07-07 | 大连旅桑实业有限公司 | A kind of sand mold mould for casting arm type casting long |
| CN111842749A (en) * | 2020-07-13 | 2020-10-30 | 中国船舶工业集团公司第七0八研究所 | Manufacturing method of universal marine steel structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1938526A1 (en) * | 1969-07-29 | 1971-02-18 | Ideal Standard | Sand core with ventilation channels |
| EP0850825A2 (en) * | 1996-12-27 | 1998-07-01 | Shimano Inc. | Hollow crank for bicycle and method for manufacturing same |
| CN1191164A (en) * | 1997-02-18 | 1998-08-26 | 曾绍谦 | Mould core device capable of simple taking out mandrel for cold forging and use method thereof |
| US6195894B1 (en) * | 1996-12-27 | 2001-03-06 | Shimano, Inc. | Bicycle crank and method for manufacturing same |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5554259A (en) * | 1978-10-18 | 1980-04-21 | Hitachi Metals Ltd | Mold casting method |
| JPS56114554A (en) * | 1980-02-13 | 1981-09-09 | Hitachi Metals Ltd | Mold |
| JPS6076249A (en) * | 1983-09-30 | 1985-04-30 | Toyota Motor Corp | Sand core |
| JPH05146841A (en) * | 1991-11-27 | 1993-06-15 | Toyota Motor Corp | Forging method |
-
2007
- 2007-09-28 FR FR0757922A patent/FR2921574B1/en not_active Expired - Fee Related
-
2008
- 2008-09-26 AT AT08840711T patent/ATE525151T1/en not_active IP Right Cessation
- 2008-09-26 EP EP08840711A patent/EP2197606B1/en not_active Not-in-force
- 2008-09-26 WO PCT/FR2008/051720 patent/WO2009050382A2/en active Application Filing
- 2008-09-26 CN CN200880107675.9A patent/CN101808762B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1938526A1 (en) * | 1969-07-29 | 1971-02-18 | Ideal Standard | Sand core with ventilation channels |
| EP0850825A2 (en) * | 1996-12-27 | 1998-07-01 | Shimano Inc. | Hollow crank for bicycle and method for manufacturing same |
| US6195894B1 (en) * | 1996-12-27 | 2001-03-06 | Shimano, Inc. | Bicycle crank and method for manufacturing same |
| CN1191164A (en) * | 1997-02-18 | 1998-08-26 | 曾绍谦 | Mould core device capable of simple taking out mandrel for cold forging and use method thereof |
Non-Patent Citations (6)
| Title |
|---|
| JP平5-146841A 1993.06.15 |
| JP昭55-54259A 1980.04.21 |
| JP昭56-114554A 1981.09.09 |
| JP昭60-76249A 1985.04.30 |
| 刘雄祥.可熔型芯注射模塑新工艺.《工程塑料应用》.2006,(第08期), * |
| 孟爽芬等.预防大型薄壁铝合金铸件裂纹的新措施――冷硬树脂砂中空型芯.《铸造》.1992,(第11期), * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2197606B1 (en) | 2011-09-21 |
| EP2197606A2 (en) | 2010-06-23 |
| WO2009050382A2 (en) | 2009-04-23 |
| FR2921574A1 (en) | 2009-04-03 |
| FR2921574B1 (en) | 2010-04-16 |
| ATE525151T1 (en) | 2011-10-15 |
| WO2009050382A3 (en) | 2009-06-11 |
| CN101808762A (en) | 2010-08-18 |
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