CN113084159A - Powder metallurgy die easy to demould - Google Patents
Powder metallurgy die easy to demould Download PDFInfo
- Publication number
- CN113084159A CN113084159A CN202110343565.XA CN202110343565A CN113084159A CN 113084159 A CN113084159 A CN 113084159A CN 202110343565 A CN202110343565 A CN 202110343565A CN 113084159 A CN113084159 A CN 113084159A
- Authority
- CN
- China
- Prior art keywords
- female die
- die
- cylindrical pin
- powder metallurgy
- divided
- 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.)
- Pending
Links
- 238000004663 powder metallurgy Methods 0.000 title claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 abstract description 9
- 239000010959 steel Substances 0.000 abstract description 9
- 238000000465 moulding Methods 0.000 abstract description 7
- 241000357293 Leptobrama muelleri Species 0.000 abstract description 6
- 238000005336 cracking Methods 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000011449 brick Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000005245 sintering Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000002783 friction material Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
Images
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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/03—Press-moulding apparatus therefor
-
- 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
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/08—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
Abstract
The invention belongs to the field of cold press molding of friction blocks of powder metallurgy brake pads, and particularly relates to an easy-to-demold powder metallurgy die which comprises a female die, an outer sleeve, an upper punch, a lower punch and a cylindrical pin, wherein the female die is provided with a female die and a male die; the female die is divided into split structures along a dividing line, the outer side surface of the female die is of a conical structure with a certain taper, the inner side surface of the outer sleeve is of a conical structure with a certain taper, the outer sleeve and the female die are sleeved on the outer side surface of the female die in a matching mode, a plurality of circular through holes are formed in the lower punch, and the cylindrical pin penetrates through the inner circular through holes of the lower punch and exposes out of the upper portion of the cylindrical pin; and the lower punch and the upper punch penetrate into an inner hole of the female die. The invention solves the problem of cracking of the joint of the steel back and the friction body when the steel back and the friction body of the friction block are subjected to one-step cold press molding; the friction and abrasion of the inner wall of the female die of the steel die are reduced, and the service life of the steel die is prolonged.
Description
Technical Field
The invention relates to a powder metallurgy die easy to demould, and belongs to the field of cold press molding of brake pad friction blocks in powder metallurgy.
Background
The friction block production process of the powder metallurgy brake pad is to prepare a friction block green compact by one-step cold press molding of a powder metallurgy friction material and a steel backing in a steel mold, and then sinter the green compact in a sintering furnace to prepare the friction block. The production process has the characteristics that the friction material and the steel backing are formed in a one-step cold pressing mode, the steel backing placing procedure before sintering in the traditional production process is reduced, and the production efficiency is improved. However, in the production process, when the friction body green compact is subjected to cold press molding and demoulding, the friction force between the friction body and the inner wall of the cold press molding steel die female die is different due to different friction body and steel back materials, so that when the friction block green compact is subjected to cold press demoulding, cracks are easily generated at the joint part of the steel back and the friction body, and the strength and the yield of the friction block after sintering are influenced.
Therefore, there is a need to provide a new powder metallurgy die structure to solve the above problems.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provide a safe and reliable demoulding way, solve the problem of demoulding cracking of a friction block green body and improve the cold press forming qualification rate of the powder metallurgy brake pad friction block green body.
The invention provides an easy-to-demould powder metallurgy die which is used for meeting the requirements.
The technical scheme adopted by the invention is as follows:
the invention relates to an easy-to-demould powder metallurgy die which comprises a female die, an outer sleeve, an upper punch, a lower punch and a cylindrical pin, wherein the female die is provided with a female die body; the female die is divided into split structures along a dividing line, the outer side surface of the female die is of a conical structure with a certain taper, the inner side surface of the outer sleeve is of a conical structure with a certain taper, the outer sleeve and the female die are sleeved on the outer side surface of the female die in a matching mode, a plurality of circular through holes are formed in the lower punch, and the cylindrical pin penetrates through the inner circular through holes of the lower punch and exposes out of the upper portion of the cylindrical pin; and the lower punch and the upper punch penetrate into an inner hole of the female die.
Preferably, the cylindrical pin is composed of an upper part and a lower part; the upper part of the cylindrical pin is of a conical structure with a certain taper, and the lower part of the cylindrical pin is of a cylindrical structure.
Preferably, the female die is divided into split structures along dividing lines, the number of the dividing lines is 2-4, and the female die is divided into the split structures formed by 2-4 parts.
Preferably, the female mold is divided into split structures along dividing lines, the number of the dividing lines is 3, and the female mold is divided into 3 parts to form the split structure.
Preferably, the taper of the outer side of the female die is between 0.10 and 0.15.
Preferably, the taper of the inner side of the sheath is between 0.08 and 0.13.
Preferably, the taper of the conical structure at the upper part of the cylindrical pin is between 0.02 and 0.1.
Due to the adoption of the technical scheme, the invention has the technical progress that:
1. the problem of cracking of the joint of the steel back and the friction body when the steel back and the friction body of the friction block are subjected to one-step cold press molding is solved;
2. the friction and abrasion of the inner wall of the female die of the steel die are reduced, and the service life of the steel die is prolonged.
Drawings
FIG. 1 is a schematic cross-sectional view of a powder metallurgy die according to the present invention;
FIG. 2 is a schematic front and top view of the cavity block of the powder metallurgy die of the present invention;
FIG. 3 is a schematic cross-sectional view of the outer sleeve of the powder metallurgy die according to the present invention;
FIG. 4 is a schematic diagram of the upper punch of the powder metallurgy die in front and top view;
FIG. 5 is a schematic structural diagram in elevation and plan view of a lower punch in the powder metallurgy die of the present invention;
FIG. 6 is a schematic structural view of a cylindrical pin in the powder metallurgy die according to the present invention;
wherein:
1-female die, 11-outer side surface of female die, 12-parting die parting line;
2-coat, 21-coat inner side;
3-upper punch;
4-lower punch, 41-circular through hole;
5-cylindrical pin, 51-upper cylindrical pin part and 52-lower cylindrical pin part.
Detailed Description
The following description of the present invention will be made with reference to the accompanying drawings 1 to 6.
The invention relates to an easy-to-demould powder metallurgy die, which comprises a female die 1, an outer sleeve 2, an upper punch 3, a lower punch 4 and a cylindrical pin 5; the female die 1 is divided into split structures along a dividing line 12, the outer side surface 11 of the female die is of a conical structure with a certain taper, the inner side surface 21 of the outer sleeve is of a conical structure with a certain taper, the outer sleeve 2 and the female die 1 are sleeved on the outer side surface 11 of the female die in a matched mode, a plurality of circular through holes 41 are formed in the lower punch 4, and the cylindrical pin 5 penetrates through the circular through holes 41 in the lower punch 4 and exposes the upper portion 51 of the cylindrical pin; the lower punch 4 and the upper punch 3 penetrate into the inner hole of the female die 1.
Preferably, the cylindrical pin 5 is composed of a cylindrical pin upper part 51 and a cylindrical pin lower part 52; the upper part 51 of the cylindrical pin is a conical structure with a certain taper, and the lower part 52 of the cylindrical pin is a cylindrical structure.
Preferably, the female die 1 is divided into separate structures along the dividing lines 12, the number of the dividing lines 12 is 2-4, and the female die 1 is divided into 2-4 parts to form the separate structures.
Preferably, the female die 1 is divided into separate structures along the dividing lines 12, and the female die 1 is divided into 3 parts by 3 dividing lines 12.
Preferably, the taper of the external side 11 of the female die is between 0.10 and 0.15.
Preferably, the taper of the inner side 21 of the jacket is between 0.08 and 0.13.
Preferably, the taper of the tapered structure of the upper portion 51 of the cylindrical pin is between 0.02 and 0.1.
During the use, after the clutch blocks unburned bricks are pressure-formed in the mould, the mould is reversed, demoulding is carried out, the outer sleeve 2 is made to go upward to be separated from the female mould 1 by using the auxiliary demoulding tool, then all parts of the split female mould 1 are separated from the clutch blocks unburned bricks outwards in sequence along the parting line 12, the non-sliding demoulding of the clutch blocks unburned bricks and the female mould 1 is realized, then the upper punch 3 is taken down, the cylindrical pin 5 is made to go downward by using the demoulding tool, the inner hole of the clutch blocks unburned bricks is separated, and the safe demoulding of the clutch blocks unburned bricks is realized.
What has been described above are just some of the embodiments of the present patent. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, which falls within the scope of the appended claims.
Claims (7)
1. An easy-to-demould powder metallurgy die comprises a female die (1), an outer sleeve (2), an upper punch (3), a lower punch (4) and a cylindrical pin (5); the female die (1) is divided into split structures along a dividing line (12), the outer side surface (11) of the female die is of a conical structure with a certain taper, the inner side surface (21) of the outer sleeve is of a conical structure with a certain taper, the outer sleeve (2) and the female die (1) are sleeved on the outer side surface (11) of the female die in a matched mode, a plurality of circular through holes (41) are formed in the lower punch (4), and the cylindrical pin (5) penetrates through the inner circular through holes (41) of the lower punch (4) and exposes out of the upper portion (51) of the cylindrical pin; the lower punch (4) and the upper punch (3) penetrate into an inner hole of the female die (1).
2. An easy-to-release powder metallurgy die according to claim 1, wherein the cylindrical pin (5) is composed of an upper cylindrical pin portion (51) and a lower cylindrical pin portion (52); the upper part (51) of the cylindrical pin is of a conical structure with a certain taper, and the lower part (52) of the cylindrical pin is of a cylindrical structure.
3. An easily demoulded powder metallurgy die according to claim 1, wherein the female die (1) is divided into separate structures along dividing lines (12), the number of the dividing lines (12) is 2-4, and the female die (1) is divided into the separate structures formed by 2-4 parts.
4. An easily released powder metallurgy die according to claim 1, wherein the die block (1) is divided into the divided structures along the dividing lines (12), the number of the dividing lines (12) is 3, and the die block (1) is divided into the divided structures formed by 3 parts.
5. An easily demoulded powder metallurgy die according to claim 1, wherein the taper of the external side surface (11) of the female die is between 0.10 and 0.15.
6. An easy-to-release powder metallurgy die according to claim 1, wherein the taper of the inner side surface (21) of the jacket is between 0.08 and 0.13.
7. An easily demoulded powder metallurgy die according to claim 2, wherein the taper of the tapered structure of the upper portion (51) of the cylindrical pin is between 0.02 and 0.1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110343565.XA CN113084159A (en) | 2021-03-30 | 2021-03-30 | Powder metallurgy die easy to demould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110343565.XA CN113084159A (en) | 2021-03-30 | 2021-03-30 | Powder metallurgy die easy to demould |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113084159A true CN113084159A (en) | 2021-07-09 |
Family
ID=76671936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110343565.XA Pending CN113084159A (en) | 2021-03-30 | 2021-03-30 | Powder metallurgy die easy to demould |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113084159A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1915654A (en) * | 2006-09-01 | 2007-02-21 | 苏州江钻新锐硬质合金有限公司 | Standing mold pressing die for bars in hard alloy, and manufacturing method |
| JP2007211277A (en) * | 2006-02-08 | 2007-08-23 | Sumitomo Denko Shoketsu Gokin Kk | Powder molding method and powder molding device |
| CN201823933U (en) * | 2010-08-06 | 2011-05-11 | 浙江东钨实业有限公司 | Alloy product forming die |
| JP2012152766A (en) * | 2011-01-24 | 2012-08-16 | Kyocera Corp | Press forming apparatus, press forming method, and cutting tool |
| CN103331444A (en) * | 2013-07-05 | 2013-10-02 | 益阳市新纪元粉末冶金有限公司 | Compression forming mold for sintered metal product, application thereof and forming mold release method |
| CN203650665U (en) * | 2013-12-19 | 2014-06-18 | 博深工具股份有限公司 | Crucible cold-press forming mould |
| CN206145035U (en) * | 2016-10-27 | 2017-05-03 | 博深工具股份有限公司 | Mosaic structure powder metallurgy brake pad's friction disc |
| CN106738210A (en) * | 2016-12-26 | 2017-05-31 | 同方威视技术股份有限公司 | A kind of mould and the method using Making mold GOS scintillating ceramics |
| CN206779456U (en) * | 2017-06-09 | 2017-12-22 | 山东百德瑞轨道交通科技有限公司 | A kind of detachable manual mould |
| CN111112606A (en) * | 2020-01-17 | 2020-05-08 | 中铁隆昌铁路器材有限公司 | Powder metallurgy brake pad friction block pressing die and method |
-
2021
- 2021-03-30 CN CN202110343565.XA patent/CN113084159A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007211277A (en) * | 2006-02-08 | 2007-08-23 | Sumitomo Denko Shoketsu Gokin Kk | Powder molding method and powder molding device |
| CN1915654A (en) * | 2006-09-01 | 2007-02-21 | 苏州江钻新锐硬质合金有限公司 | Standing mold pressing die for bars in hard alloy, and manufacturing method |
| CN201823933U (en) * | 2010-08-06 | 2011-05-11 | 浙江东钨实业有限公司 | Alloy product forming die |
| JP2012152766A (en) * | 2011-01-24 | 2012-08-16 | Kyocera Corp | Press forming apparatus, press forming method, and cutting tool |
| CN103331444A (en) * | 2013-07-05 | 2013-10-02 | 益阳市新纪元粉末冶金有限公司 | Compression forming mold for sintered metal product, application thereof and forming mold release method |
| CN203650665U (en) * | 2013-12-19 | 2014-06-18 | 博深工具股份有限公司 | Crucible cold-press forming mould |
| CN206145035U (en) * | 2016-10-27 | 2017-05-03 | 博深工具股份有限公司 | Mosaic structure powder metallurgy brake pad's friction disc |
| CN106738210A (en) * | 2016-12-26 | 2017-05-31 | 同方威视技术股份有限公司 | A kind of mould and the method using Making mold GOS scintillating ceramics |
| CN206779456U (en) * | 2017-06-09 | 2017-12-22 | 山东百德瑞轨道交通科技有限公司 | A kind of detachable manual mould |
| CN111112606A (en) * | 2020-01-17 | 2020-05-08 | 中铁隆昌铁路器材有限公司 | Powder metallurgy brake pad friction block pressing die and method |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210709 |
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| RJ01 | Rejection of invention patent application after publication |