CN202804052U - Cold extrusion mould - Google Patents

Cold extrusion mould Download PDF

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Publication number
CN202804052U
CN202804052U CN 201220392462 CN201220392462U CN202804052U CN 202804052 U CN202804052 U CN 202804052U CN 201220392462 CN201220392462 CN 201220392462 CN 201220392462 U CN201220392462 U CN 201220392462U CN 202804052 U CN202804052 U CN 202804052U
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CN
China
Prior art keywords
chamber
blank
shunting
cold
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.)
Withdrawn - After Issue
Application number
CN 201220392462
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Chinese (zh)
Inventor
蔡永辉
王平
徐文华
陈爱华
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.)
JIANGSU SUNWAY GROUP FEIDA CO Ltd
Original Assignee
JIANGSU SUNWAY GROUP FEIDA CO Ltd
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Priority to CN 201220392462 priority Critical patent/CN202804052U/en
Application granted granted Critical
Publication of CN202804052U publication Critical patent/CN202804052U/en
Withdrawn - After Issue legal-status Critical Current
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Abstract

The utility model provides a cold extrusion mould which comprises an upper punch and a lower mould provided with a feeding cavity and a shunt cavity. The outer shape of the upper punch is consistent with an inner hole of a part. The feeding cavity is used for containing blank. The shape of the feeding cavity is consistent with that of the blank. The shunt cavity is arranged at the bottom of the feeding cavity. A shunt port of the shunt cavity is communicated with the bottom of the feeding cavity. The shunt cavity and the feeding cavity are coaxial cavities. Compared with the prior art, the cold extrusion mould comprises the upper punch and the lower mould forming the feeding cavity and the shunt cavity. During the process of cold extrusion, materials, in the inner hole of the part, of the blank placed in the feeding cavity are shunted through the shunt cavity and a cylindrical column provided with inner holes and forging blank of a shunt body, connected with the bottom of the cylindrical column are formed. Excessive materials inside the forging blank can be removed and a product part with inner holes is obtained. Production efficiency is improved and product accuracy is ensured.

Description

A kind of cold extrusion mould
[technical field]
The utility model relates to metal precision forging field, particularly a kind of cold forging method and cold extrusion mould.
[background technology]
In the prior art, often adopt the cold forging backward extrusion technology to forge to have the part of endoporus, the advantage such as this technique has the working (machining) efficiency height, and spillage of material is low.Please refer to shown in Figure 1, its parts sectional view for adopting existing cold forging backward extrusion technology to obtain.This part is the tubular cylinder with endoporus.Its outside diameter is D, and diameter of bore is d, and bucket base thickness degree is b, and sidewall thickness is t, and the oral area defective is c.Because the restriction of raw-material performance (such as yield point strength, tensile strength, percentage elongation etc.) and indirect-extrusion mould intensity, therefore, the size that applicable backward extrusion technology is forged such part also has corresponding requirement.Concrete, reasonably dimensional requirement is base thickness b 〉=0.8t, deflection ε=d 2/ D 2Claimed range be 15%~80%, oral area defective c ≈ 0.3t simultaneously.Generally adopt other efficient machining class methods on the low side to make for the part with endoporus that does not meet this requirement.But, adopt the manufacturing of machining class methods to have the part of endoporus so that high material consumption, working (machining) efficiency are low, thereby increased product cost.
Therefore, be necessary to propose a kind of improved technical scheme and solve the problems referred to above.
[utility model content]
The purpose of this utility model is to provide a kind of cold extrusion mould, and it can forge the part with endoporus of sizes, and can enhance productivity, guarantee Product Precision.
In order to address the above problem, the utility model proposes a kind of cold extrusion mould, it comprises upper punch, is formed with the counterdie in pan feeding chamber and shunting chamber, the outer shape of described upper punch is consistent with the endoporus of part; Described pan feeding chamber is used for holding blank, and its shape is consistent with the profile of blank; Described shunting chamber is arranged at the bottom in described pan feeding chamber, and communicates with the bottom in pan feeding chamber by the diffluence pass on the shunting chamber, and described shunting chamber and described pan feeding chamber are coaxial cavity.
Further, described shunting chamber is cylinder, and its shunting chamber diameter is less than the diameter of bore of part.
Further, the diameter of bore of described part is 1.05 times shunting chamber diameter.
Further, described cold extrusion forming inner chamber operation comprises: the pan feeding chamber of described round blank being put into counterdie; Upper punch moves downward; When upper punch is fitted blank fully, the stressed increase of blank, the material that is positioned at endoporus in the blank is shunted by the shunting chamber of bottom, pan feeding chamber; When upper punch came downwards to lowest order, described cold-extruded operation was finished, and formed the forging stock of the tubular cylinder with endoporus and the shunting body that links to each other with tubular cylinder bottom.
Compared with prior art, cold extrusion mould of the present utility model, it comprises upper punch, is formed with the counterdie in pan feeding chamber and shunting chamber.In the cold-extruded operation, the material that is positioned at inner bore of part that is put in the blank in the cold extrusion mould pan feeding chamber is shunted by the shunting chamber, thereby formed the forging stock of the tubular cylinder with endoporus and the shunting body that links to each other with tubular cylinder bottom; Then the excess stock in the forging stock is removed, thereby obtained having the product parts of endoporus.Owing to adopt the shunting chamber to shunt, so that the part that is not suitable for adopting cold forging instead to squeeze also can adopt the method in the utility model to process, like this, not only can enhance productivity, and can guarantee Product Precision.
[description of drawings]
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.Wherein:
The parts sectional view of Fig. 1 for adopting existing cold forging backward extrusion technology to obtain;
Fig. 2 is the cold forging method process chart in one embodiment that the utility model forges the forging with endoporus;
The shape of product that Fig. 3 (a) obtains for the cold-extruded operation;
Fig. 3 (b) is for adopting cutting way to cut away the shunting body of forging stock described in Fig. 3 (a) to obtain having the cylinder part of blind hole;
Fig. 3 (c) is for adopting the stamping-out mode part corresponding to endoporus of the tubular cylinder in the forging stock described in Fig. 3 (a) to be removed to obtain having the cylinder part of through hole; With
Fig. 4 is the utility model shape of product change procedure figure in one embodiment.
[specific embodiment]
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent more, below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Alleged " embodiment " or " embodiment " refer to be contained in special characteristic, structure or the characteristic at least one implementation of the utility model herein.Different local in this manual " in one embodiment " that occur not are all to refer to same embodiment, neither be independent or the embodiment mutually exclusive with other embodiment optionally.
Cold extrusion mould of the present utility model, it comprises upper punch, is formed with the counterdie in pan feeding chamber and shunting chamber.In the cold-extruded operation, the material that is positioned at inner bore of part that is put in the blank in the cold extrusion mould pan feeding chamber is shunted by the shunting chamber, thereby formed the forging stock of the tubular cylinder with endoporus and the shunting body that links to each other with tubular cylinder bottom; Then the excess stock in the forging stock is removed, thereby obtained having the product parts of endoporus.Owing to adopt the shunting chamber to shunt, so that the part that is not suitable for adopting cold forging instead to squeeze also can adopt the method in the utility model to process, like this, not only can enhance productivity, and can guarantee Product Precision.
Please refer to shown in Figure 2ly, it has the cold forging method process chart in one embodiment of the forging of endoporus for the utility model forges.Please refer to shown in Figure 3ly, it is the utility model shape of product change procedure figure in one embodiment.Specifically introduce technological process shown in Figure 2 below in conjunction with Fig. 3.
Described technological process comprises the steps.
Step 210, cold-extruded.
Described cold-extruded is for to push the formation forging stock by cold extrusion mould to blank, and described forging stock comprises the tubular cylinder with endoporus and the shunting body that links to each other with tubular cylinder bottom;
Please refer to shown in Figure 4ly, it is to utilize cold extrusion mould in the utility model to carry out the product shaping procedure chart of cold-extruded operation.
Cold extrusion mould among the figure comprises upper punch 410, is formed with the counterdie 420 in pan feeding chamber 422 and shunting chamber 424.
The outer shape of described upper punch 410 is consistent with the endoporus of part (perhaps being called forging).In the present embodiment, upper punch 410 is cylinder, and its outside diameter is that d1(is that the endoporus of part is cylinder, and diameter of bore is d1).
Described pan feeding chamber 422 is used for holding blank 430, and its shape is consistent with the profile of blank 430.In the present embodiment, described pan feeding chamber 422 be shaped as cylinder, its chamber interior diameter is that D(is the cylinder that is shaped as of blank, its outside diameter is D), and D>d1.
Described shunting chamber 424 is arranged at the bottom in described pan feeding chamber 422, and communicates with the bottom in pan feeding chamber by the diffluence pass on the shunting chamber 424, and described shunting chamber and described pan feeding chamber are coaxial cavity.In the present embodiment, described shunting chamber 424 is cylinder, and the chamber interior diameter in its shunting chamber is d2, and the chamber interior diameter d2 in shunting chamber is less than the diameter of bore d1 of part.Preferably, d1 ≈ 1.05d2.
Next introducing in detail utilizes cold extrusion mould to carry out the process of cold-extruded.
Described blank 430 is put into the pan feeding chamber 422 of counterdie; Upper punch 410 moves downward; When upper punch 410 is fitted blank 430 fully, the stressed increase of blank, because upper punch 410 sizes are less than the excircle dimension of described blank 430, in the situation of described blank 430 stressed increases, be positioned at the material of inner bore of part in described upper punch 410 extrusion billets, the material that is positioned at endoporus in the blank is shunted by the shunting chamber of bottom, pan feeding chamber; When upper punch 410 came downwards to lowest order, described cold-extruded operation was finished, and formed the forging stock of the tubular cylinder with endoporus and the shunting body that links to each other with tubular cylinder bottom.
The shape of product that Fig. 3 (a) obtains for the cold-extruded operation, it comprises the forging stock of the tubular cylinder with endoporus and the column shunting body that links to each other with tubular cylinder bottom.Wherein, the outside diameter that has the tubular barrel portion of endoporus in the forging stock is D, and diameter of bore is d1, and bucket base thickness degree is b1, and sidewall thickness is t1, and the oral area defective is c1; The outside diameter of the column shunting body in the forging stock is d2, and d2 is slightly less than d1, d1 ≈ 1.05d2.
Because the intracavity diameter d2 in cold extrusion mould shunting chamber is slightly less than the diameter of bore d1 of part.Preferably, d1 ≈ 1.05d2.Therefore, in Cold Extrusion Process, can make the material monolithic that is positioned at inner bore of part of the blank that is put in the pan feeding chamber 522 move to shunting chamber 424, because the intracavity diameter d2 in shunting chamber is less than the diameter of bore d1 of part, produce compression when making product material to the extruding of shunting chamber 424, when the endoporus of forging stock is shaped without the material tearing defect.Owing to the material that is positioned at inner bore of part in the blank is to move to the shunting chamber, can make forging stock can not produce the angular defect of collapsing of oral area c1 in addition.
Step 220, shaping.
Remove the excess stock in the forging stock, thereby obtain having the part of endoporus.
3(b) in described forming process, adopting cutting way to cut away the shunting body of forging stock described in Fig. 3 (a) to obtain having the cylinder part of blind hole.The outside diameter of this part is D, and diameter of bore is d1, and bucket base thickness degree is b1, and sidewall thickness is t1, and the oral area defective is c1.
3(c) in described forming process, adopting the stamping-out mode part corresponding to endoporus of tubular cylinder in the forging stock described in Fig. 3 (a) to be removed to obtain having the cylinder part of through hole.
Cold forging method of the present utility model comprises cold-extruded operation and forming process, wherein said cold-extruded operation is for to push blank by cold extrusion mould, because cold extrusion mould comprises pan feeding chamber 422 and is arranged at the shunting chamber of bottom, pan feeding chamber, and the intracavity diameter d2 in shunting chamber is less than the diameter of bore d1 of part.Preferably, d1 ≈ 1.05d2.This dimensional requirement is in Cold Extrusion Process, make the material monolithic that is positioned at inner bore of part of the blank that is put in the pan feeding chamber 422 move to shunting chamber 424, because the intracavity diameter d2 in shunting chamber is less than the diameter of bore d1 of part, produce compression when making product material to the extruding of shunting chamber 424, when the endoporus of forging stock is shaped without the material tearing defect.Owing to the material that is positioned at inner bore of part in the blank is to move to the shunting chamber, can make part can not produce the angular defect of collapsing of oral area c in addition.Thereby make cold forging method of the present utility model not be only applicable to forge the part with endoporus that base thickness is far smaller than wall thickness, and go for not in the reasonable scope the part with endoporus of deflection.
By the part with endoporus (part shown in Fig. 3 (b) and Fig. 3 (c)) its oral area defective c1≤0.05t that cold forging method of the present utility model makes, base thickness b1 can be reduced to 2mm.Deflection ε=d 2/ D 2Claimed range be 15%~80%, thereby the part that makes the manufacturing of common employing machining class methods have endoporus can make by cold forging method of the present utility model, like this, not only can enhance productivity, and can guarantee Product Precision.
Above-mentioned explanation has fully disclosed the specific embodiment of the present utility model.It is pointed out that and be familiar with the scope that any change that the person skilled in art does the specific embodiment of the present utility model does not all break away from claims of the present utility model.Correspondingly, the scope of claim of the present utility model also is not limited only to previous embodiment.

Claims (3)

1. a cold extrusion mould is characterized in that it comprises upper punch, is formed with the counterdie in pan feeding chamber and shunting chamber,
The outer shape of described upper punch is consistent with the endoporus of part;
Described pan feeding chamber is used for holding blank, and its shape is consistent with the profile of blank;
Described shunting chamber is arranged at the bottom in described pan feeding chamber, and communicates with the bottom in pan feeding chamber by the diffluence pass on the shunting chamber, and described shunting chamber and described pan feeding chamber are coaxial cavity.
2. cold extrusion mould according to claim 1 is characterized in that, described shunting chamber is cylinder, and its shunting chamber diameter is less than the diameter of bore of part.
Cold extrusion mould according to claim 1, it is characterized in that the diameter of bore of described part is 1.05 times shunting chamber diameter.
CN 201220392462 2012-08-09 2012-08-09 Cold extrusion mould Withdrawn - After Issue CN202804052U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220392462 CN202804052U (en) 2012-08-09 2012-08-09 Cold extrusion mould

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220392462 CN202804052U (en) 2012-08-09 2012-08-09 Cold extrusion mould

Publications (1)

Publication Number Publication Date
CN202804052U true CN202804052U (en) 2013-03-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220392462 Withdrawn - After Issue CN202804052U (en) 2012-08-09 2012-08-09 Cold extrusion mould

Country Status (1)

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CN (1) CN202804052U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102814441A (en) * 2012-08-09 2012-12-12 江苏森威集团飞达股份有限公司 Cold forging method and cold extrusion mould
CN103990754A (en) * 2014-06-03 2014-08-20 盐城工学院 Thick-wall and thin-bottom cup-shaped part machining device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102814441A (en) * 2012-08-09 2012-12-12 江苏森威集团飞达股份有限公司 Cold forging method and cold extrusion mould
CN102814441B (en) * 2012-08-09 2015-05-20 江苏森威集团飞达股份有限公司 Cold forging method and cold extrusion mould
CN103990754A (en) * 2014-06-03 2014-08-20 盐城工学院 Thick-wall and thin-bottom cup-shaped part machining device

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AV01 Patent right actively abandoned

Granted publication date: 20130320

Effective date of abandoning: 20150520

RGAV Abandon patent right to avoid regrant