CN104625051A - Assisted demoulding mechanism for powder metallurgy molding upper punch - Google Patents
Assisted demoulding mechanism for powder metallurgy molding upper punch Download PDFInfo
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- CN104625051A CN104625051A CN201510047346.1A CN201510047346A CN104625051A CN 104625051 A CN104625051 A CN 104625051A CN 201510047346 A CN201510047346 A CN 201510047346A CN 104625051 A CN104625051 A CN 104625051A
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- China
- Prior art keywords
- upper punch
- powder metallurgy
- push rod
- piston piece
- cushion block
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Abstract
The invention discloses an assisted demoulding mechanism for a powder metallurgy molding upper punch. The assisted demoulding mechanism comprises the upper punch used for demoulding, an assisted ejector mechanism is arranged at the bottom of the upper punch and comprises a cushion block, a piston part and an ejector rod, the cushion block and the piston part are arranged in an inner cavity in one end of the upper punch, the cushion block seals and supports the inner cavity of the upper punch, an air chamber is formed between the cushion block and the piston part, the cavity wall of the upper punch is provided with an air inlet communicated with the air chamber, the air inlet is communicated with an air cylinder outwards, the piston part is connected with one end of the ejector rod, the other end of the ejector rod is flush with the other end face, where a boss is arranged, of the upper punch, and the situation that an upper parting line of a product is too large is prevented. By the adoption of the technical scheme, a compact can be effectively prevented from cracking in the demoulding process, quality risk of the compact is obviously reduced in the molding process, dual pressure generated by the compact can be effectively prevented in the demoulding process, and damage risk of moulds is reduced.
Description
Technical field
The invention belongs to pressed powder metallurgic product field, be specifically related to a kind of auxiliary demoulding mechanism of powder metallurgy formation upper punch.
Background technology
Existing powder metallurgy upper punch with the level is generally designed to overall structure, namely boss completely by upper punching forming out, in knockout course, because the internal stress of pressed compact is released, especially radial dimension expands, and shows as compacting resilience, product boss is very large to the frictional force of shaping upper punch, product easily cracks at step place, or can not deviate to cause mould damaged smoothly, thus causes product to scrap in a large number or burn failure.
Product boss is overall structure, along with the prolongation of production cycle, can accelerate the wearing and tearing to boss inner chamber, reduces the mold use life-span.
Summary of the invention
Problem to be solved by this invention is exactly increase the knockout press of powder metallurgy product in shaping knockout course; product is made to deviate from upper punch smoothly; thus prevent product from cracking in shaping knockout course; protection mould; and extend the mold use life-span by optimal design; reduce production cost, solve the destabilizing factor in producing.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the present invention is achieved through the following technical solutions:
A kind of auxiliary demoulding mechanism of powder metallurgy formation upper punch, comprise the upper punch for the demoulding, an auxiliary ejection mechanism is provided with bottom described upper punch, described auxiliary ejection mechanism comprises cushion block, piston piece and push rod, described cushion block and piston piece are arranged in the inner chamber of upper punch one end, the sealing of described cushion block and support upper punch inner chamber and and form gas chamber between piston piece, the chamber wall of upper punch is provided with the air admission hole being communicated with gas chamber, described air admission hole is outwards communicated with cylinder, described piston piece connects one end of push rod, another of the other end of described push rod and upper punch contains the end face trim of boss, prevent die parting line on product excessive.
Further, described push rod be provided with bar shoulder, and bar shoulder with upper punch there is axially-movable gap, described piston piece has axially-movable gap in gas chamber and between upper punch.
Further, the axially-movable gap of described push rod bar shoulder and upper punch is less than the axially-movable gap between piston piece and upper punch.
Further, the boss face of described upper punch and the fineness of inner cavity surface, within Ra0.04, make the coefficient of friction of pressed compact in knockout course little.
Further, described air inlet position is also provided with for controlling air inlet and exhaust bidirectional electromagnetic valve.
The invention has the beneficial effects as follows:
1, adopt the auxiliary demoulding mechanism of upper punch of the present invention, can effectively prevent pressed compact to crack in knockout course, obviously reduce the quality risk of pressed compact in forming process.
2, adopt the auxiliary demoulding mechanism of upper punch of the present invention, effectively can prevent the two pressure of pressed compact product in knockout course, reduce the risk of mould breakage.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Structural representation when push rod ejects 1mm when Fig. 2 is the demoulding in embodiment.
Number in the figure illustrates: 1, cushion block, 2, upper punch, 3, piston piece, 4, push rod, 5, air admission hole, 6, one end of push rod, 7, gas chamber, 8, boss.
Detailed description of the invention
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
With reference to shown in Fig. 1, a kind of auxiliary demoulding mechanism of powder metallurgy formation upper punch, comprise the upper punch 2 for the demoulding, an auxiliary ejection mechanism is provided with bottom described upper punch 2, described auxiliary ejection mechanism comprises cushion block 1, piston piece 3 and push rod 4, described cushion block 1 and piston piece 3 are arranged in the inner chamber of upper punch 2 one end, described cushion block 1 seal and support upper punch inner chamber and and form gas chamber 7 between piston piece 3, the chamber wall of upper punch 2 is provided with the air admission hole 5 being communicated with gas chamber 7, described air admission hole 5 is outwards communicated with cylinder, described piston piece 3 connects one end of push rod 4, another of the other end 6 of described push rod 4 and upper punch 2 contains the end face trim of boss 8, prevent die parting line on product excessive.
Described push rod 4 be provided with bar shoulder, and bar shoulder with upper punch 2 there is axially-movable gap, described piston piece 3 has axially-movable gap in gas chamber 7 and between upper punch 2.
The axially-movable gap of described push rod bar shoulder and upper punch 2 is less than the axially-movable gap between piston piece 3 and upper punch 2, about little 0.1mm in the present embodiment.
The boss face of described upper punch 2 and the fineness of inner cavity surface, within Ra0.04, make the coefficient of friction of pressed compact in knockout course little.
Described air admission hole 5 place is also provided with for controlling air inlet and exhaust bidirectional electromagnetic valve, and in the present embodiment, air admission hole 5 connects upper two qi of chong channel ascending adversely cylinders, and air inlet and exhaust angle are also controlled by bidirectional electromagnetic valve; Product is when suppressing, and push rod 4 is in position, the most end, and extrude upper punch step, when the demoulding starts, air admission hole 5 pairs of gas chamber 7 inflate, thus promotes piston piece 3, and piston piece 3 promotes push rod 4 again and deviates from product, and chamber internal gas pressure is discharged by bidirectional electromagnetic valve.
When Fig. 2 is the demoulding in the present embodiment, push rod 4 ejects 1mm, thus the schematic diagram that product is deviate from.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. the auxiliary demoulding mechanism of a powder metallurgy formation upper punch, comprise the upper punch (2) for the demoulding, it is characterized in that, an auxiliary ejection mechanism is provided with in described upper punch (2) bottom, described auxiliary ejection mechanism comprises cushion block (1), piston piece (3) and push rod (4), described cushion block (1) and piston piece (3) are arranged in the inner chamber of upper punch (2) one end, described cushion block (1) sealing and support upper punch inner chamber and and form gas chamber (7) between piston piece (3), the chamber wall of upper punch (2) is provided with the air admission hole (5) being communicated with gas chamber (7), described air admission hole (5) is outwards communicated with cylinder, described piston piece (3) connects one end of push rod (4), another of the other end (6) of described push rod (4) and upper punch (2) contains the end face trim of boss (8), prevent die parting line on product excessive.
2. the auxiliary demoulding mechanism of powder metallurgy formation upper punch according to claim 1; it is characterized in that; described push rod (4) is provided with bar shoulder; and bar shoulder has axially-movable gap with upper punch (2), and described piston piece (3) has axially-movable gap in gas chamber (7) and between upper punch (2).
3. the auxiliary demoulding mechanism of powder metallurgy formation upper punch according to claim 2, is characterized in that, the axially-movable gap of described push rod bar shoulder and upper punch (2) is less than the axially-movable gap between piston piece (3) and upper punch (2).
4. the auxiliary demoulding mechanism of powder metallurgy formation upper punch according to claim 1, is characterized in that, the boss face of described upper punch (2) and the fineness of inner cavity surface, within Ra0.04, make the coefficient of friction of pressed compact in knockout course little.
5. the auxiliary demoulding mechanism of powder metallurgy formation upper punch according to claim 1, is characterized in that, described air admission hole (5) place is also provided with for controlling air inlet and exhaust bidirectional electromagnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510047346.1A CN104625051A (en) | 2015-01-30 | 2015-01-30 | Assisted demoulding mechanism for powder metallurgy molding upper punch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510047346.1A CN104625051A (en) | 2015-01-30 | 2015-01-30 | Assisted demoulding mechanism for powder metallurgy molding upper punch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104625051A true CN104625051A (en) | 2015-05-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510047346.1A Pending CN104625051A (en) | 2015-01-30 | 2015-01-30 | Assisted demoulding mechanism for powder metallurgy molding upper punch |
Country Status (1)
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| CN (1) | CN104625051A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4047864A (en) * | 1975-10-06 | 1977-09-13 | Wolverine Aluminum Corporation | Apparatus for producing spherical articles |
| US4384840A (en) * | 1980-04-14 | 1983-05-24 | Societe Anonyme Dite: Compagnie Generale D'electricite | Apparatus for molding tubular parts by isostatic compression |
| JP2009291799A (en) * | 2008-06-03 | 2009-12-17 | Kohtaki Seiki Kk | Powder molding press machine |
| JP2010047806A (en) * | 2008-08-22 | 2010-03-04 | Hitachi Powdered Metals Co Ltd | Molding die device and method for molding molded body having female screw part-fitted shaft hole using the same |
| CN201579953U (en) * | 2009-12-01 | 2010-09-15 | 福州联鸿精密模具有限公司 | Car lamp deep-cavity mould with heat source controller pneumatic push-out structure |
| CN103128278A (en) * | 2011-11-23 | 2013-06-05 | 扬州市海力精密机械制造有限公司 | Powder molding machine upper slide block protection demolding mechanism |
| CN103191981A (en) * | 2013-04-16 | 2013-07-10 | 苏州莱特复合材料有限公司 | Slider upper inner punch for press |
| CN203409980U (en) * | 2013-08-20 | 2014-01-29 | 成都市联余精密机械有限公司 | Air-blowing structure for assisting demolding |
| CN203972860U (en) * | 2014-07-16 | 2014-12-03 | 东睦新材料集团股份有限公司 | The shaping dies of a kind of powder metallurgy bevel gear |
-
2015
- 2015-01-30 CN CN201510047346.1A patent/CN104625051A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4047864A (en) * | 1975-10-06 | 1977-09-13 | Wolverine Aluminum Corporation | Apparatus for producing spherical articles |
| US4384840A (en) * | 1980-04-14 | 1983-05-24 | Societe Anonyme Dite: Compagnie Generale D'electricite | Apparatus for molding tubular parts by isostatic compression |
| JP2009291799A (en) * | 2008-06-03 | 2009-12-17 | Kohtaki Seiki Kk | Powder molding press machine |
| JP2010047806A (en) * | 2008-08-22 | 2010-03-04 | Hitachi Powdered Metals Co Ltd | Molding die device and method for molding molded body having female screw part-fitted shaft hole using the same |
| CN201579953U (en) * | 2009-12-01 | 2010-09-15 | 福州联鸿精密模具有限公司 | Car lamp deep-cavity mould with heat source controller pneumatic push-out structure |
| CN103128278A (en) * | 2011-11-23 | 2013-06-05 | 扬州市海力精密机械制造有限公司 | Powder molding machine upper slide block protection demolding mechanism |
| CN103191981A (en) * | 2013-04-16 | 2013-07-10 | 苏州莱特复合材料有限公司 | Slider upper inner punch for press |
| CN203409980U (en) * | 2013-08-20 | 2014-01-29 | 成都市联余精密机械有限公司 | Air-blowing structure for assisting demolding |
| CN203972860U (en) * | 2014-07-16 | 2014-12-03 | 东睦新材料集团股份有限公司 | The shaping dies of a kind of powder metallurgy bevel gear |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150520 |