CN2915485Y - Top pressure system of large scale powder press - Google Patents
Top pressure system of large scale powder press Download PDFInfo
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- CN2915485Y CN2915485Y CN 200620069304 CN200620069304U CN2915485Y CN 2915485 Y CN2915485 Y CN 2915485Y CN 200620069304 CN200620069304 CN 200620069304 CN 200620069304 U CN200620069304 U CN 200620069304U CN 2915485 Y CN2915485 Y CN 2915485Y
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Abstract
The utility model relates to a hydraulic top-pressure system of a large dry-powder press which is applicable for dry powder forming The top pressure system includes a fuel inlet, a block, a rolling reversal valve, a check valve, a top pressure oil cylinder, a hydraulic check valve, and a top pressure safety valve. The fuel inlet is connected to the oil pump of the hydraulic station via the oil tube. The block is arranged on the lathe bed of the powder presser, while the rolling reversal valve / hydraulic check valve / top pressure oil cylinder are arranged on the sunken beam and the top pressure safety valve is set on the hydraulic station of the dry-powder presser. The block is fixed on the lathe bed with a wedge structure. The rolling reversal valve includes a check valve core and a check roller. It adopts rolling reversion and prepares for two-position three-way valve three connectors (i.e. connector A / P/ R). The hydraulic check valve is also provided with three connectors (A / B /Z) and is associated with the rolling reversal valve. This utility model enables the product to have higher accuracy with its geometric dimension and the volume density of the blanks can be in a more uniform distribution, which enables a higher stability in production.
Description
Technical field
What the top pressing system of the utility model large powder press related to is a kind of fluid pressure type top pressing system that is used for the dry powder press powder compacting of making.
Background technology
At present, large powder press adopts is advanced pressure die two-way three compact techniques that float, and makes the geometric accuracy height of product, and the volume density of blank is evenly distributed, production latent qualitative good.
The roof pressure technology is to realize the key of two-way three compact techniques, so-called bidirectional strength is neutralized system, be exactly that upper punch carries out a precompressed earlier, reach powder compacting from the top down, die moves downward with upper punch then, suppress synchronously, reach the compacting from bottom to top to powder, when stop in die arrival pressing position, upper punch still moves downward a segment distance, in the compacting of carrying out once from the top down, will make blank reach the uniform purpose of density to powder like this.This step is called roof pressure.And in the compacting of no roof pressure, lacked this step, like this when the height of blank is big, suppress from the top down the first time of upper cavity die and powder can not be pressed very tight, will cause on the blank density Panasonic tight, cause the part poor mechanical property, even blank is ftractureed when sintering, cause waste product.
The dish spring is generally adopted in the realization of large press roof pressure at present, with regard to the present domestic external dish spring manufacturer that comprises, the dish spring is difficult to guarantee its coefficient of elasticity and service life under every day up to ten thousand time operating positions, will make the roof pressure actual effect like this, cause producing waste product, bring unnecessary economic loss, and replacing dish spring bothers the whole box body of will dismantling, the main beam of pressing more, the labour intensity that is equivalent to an overhaul has also influenced the operate as normal progress of producer.
Summary of the invention
The utility model purpose is the top pressing system that a kind of large powder press is provided at above-mentioned weak point, this system is that to be directed to the large-tonnage dry powder press specially designed, is applicable to relevant industries such as magnetic material, carbide alloy, powder metallurgy, electronic ceramics.Adopt top pressing system of the present utility model, not only make the realization of roof pressure simple more, easily go, increased substantially the service life of machine, and for ease of maintenaince, can make the geometric accuracy of product higher, the volume density distributing homogeneity of blank is better, the latent qualitative further raising of production.
The top pressing system of large powder press takes following scheme to realize: the top pressing system structure of large powder press comprises oil-in, collision block, roller reversal valve, check valve, roof pressure oil cylinder, hydraulic control one-way valve, roof pressure safety valve.Oil-in links to each other with oil pump on the Hydraulic Station by oil pipe, collision block device on the lathe bed of dry powder press, roller reversal valve, hydraulic control one-way valve, the roof pressure cylinder apparatus is on recessed crossbeam.The roof pressure safety valve is arranged on the Hydraulic Station of dry powder press.
Collision block adopts wedge structure to be fixed on the lathe bed, the roller reversal valve has change-over valve core, the commutation roller, when bumping against collision block, the commutation roller reaches the commutation purpose, the roller reversal valve adopts the roller commutation, for two position three-way valve is provided with A, P, three connectors of R, the A mouth of roller reversal valve links to each other with the hydraulic control mouth of hydraulic control one-way valve when zero-bit, the P mouth outside of roller reversal valve links to each other with the roof pressure oil cylinder, the P mouth of roller reversal valve check valve (1) inner and in the roller commutation valve body links to each other, the R mouth of roller reversal valve links to each other with check valve, the A mouth is connected with the P mouth when collision block makes the commutation of roller reversal valve, promptly be connected with the roof pressure oil cylinder, the check valve (2) in the R mouth of roller reversal valve and the roller change valve links to each other.
Hydraulic control one-way valve is provided with A, B, three connectors of Z, and wherein the B mouth links to each other with oil-in, and the A mouth links to each other with the roof pressure oil cylinder, and the Z mouth is the hydraulic control mouth, links to each other with the roller reversal valve.
The roof pressure safety valve is an overflow valve, is arranged on the fluid pressure line of dry powder press Hydraulic Station, opens when the excessive roof pressure safety valve of in-oil cylinder pressure, and the safeguard protection effect is played in hydraulic oil overflow release.
The roof pressure oil cylinder is provided with two, is installed on the left and right two ends of recessed crossbeam respectively.The roof pressure oil cylinder has cylinder body, and device has piston, piston rod in the cylinder body.
The method of this realization roof pressure of the utility model top pressing system can lose efficacy roof pressure because of fatigue as the dish spring, so stability improves greatly owing to be to use hydraulic system.And the life-span of hydraulic system is again much larger than the dish spring.Make increase substantially the service life of machine like this.
The roof pressure technology is to realize the key of two-way three compact techniques, item pressing system of the present invention is that large powder press adopts critical system in unsteady two-way three compact techniques of advanced pressure die, can make the geometric accuracy of product higher, the volume density distributing homogeneity of blank is better, the latent qualitative further raising of production.The utility model top pressing system is suitable for the supporting uses of relevant industries large powder press such as magnetic material, carbide alloy, powder metallurgy, electronic ceramics, the supporting use of 100 tons of A types of particularly suitable dry powder press, be that machinery and hydraulic pressure combine, make large tonnage mechanical type press structure more perfect.
Description of drawings
The utility model is described in further detail below with reference to accompanying drawing.
Fig. 1 is the top pressing system structural representation of large powder press.
Fig. 2 is the top pressing system user mode schematic diagram of large powder press.
The specific embodiment
With reference to accompanying drawing 1,2, the top pressing system structure of large powder press comprises oil-in 1, collision block 2, roller reversal valve 3, check valve 4, roof pressure oil cylinder 5, hydraulic control one-way valve 6, roof pressure safety valve 7.Oil-in 1 links to each other with oil pump on the Hydraulic Station by oil pipe, and collision block 2 devices are on the lathe bed of dry powder press, and roller reversal valve 3, hydraulic control one-way valve 6, roof pressure oil cylinder 5 devices are on recessed crossbeam 8.Roof pressure safety valve 7 is arranged on the Hydraulic Station of dry powder press.
Collision block 2 adopts wedge structure to be fixed on the lathe bed, roller reversal valve 3 has change-over valve core 3-1, commutation roller 3-2, when bumping against collision block 2, commutation roller 3-2 reaches the commutation purpose, roller reversal valve 3 adopts the roller commutation, for two position three-way valve is provided with A, P, three connectors of R, the A mouth of roller reversal valve 3 links to each other with the hydraulic control mouth of hydraulic control one-way valve 6 when zero-bit, the P mouth outside of roller reversal valve 3 links to each other with roof pressure oil cylinder 5, the check valve (1) that the P mouth of roller reversal valve 3 is inner and roller commutation valve body is interior (3-3) links to each other, the R mouth of roller reversal valve 3 links to each other with check valve 4, the A mouth is connected with the P mouth when collision block 2 makes 3 commutations of roller reversal valve, promptly be connected with roof pressure oil cylinder 5, the check valve (2) in the R mouth of roller reversal valve 3 and the roller change valve (3-4) links to each other.
Hydraulic control one-way valve 6 is provided with A, B, three connectors of Z, and wherein the B mouth links to each other with oil-in 1, and the A mouth links to each other with roof pressure oil cylinder 5, and the Z mouth is the hydraulic control mouth, links to each other with roller reversal valve 3.
Roof pressure safety valve 7 is an overflow valve, is arranged on the fluid pressure line of dry powder press Hydraulic Station, opens when the excessive roof pressure safety valve 7 of in-oil cylinder pressure, and the safeguard protection effect is played in hydraulic oil overflow release.
Roof pressure oil cylinder 5 is provided with two, is installed on recessed crossbeam 8 left and right two ends respectively.Roof pressure oil cylinder 5 has cylinder body, and device has piston 5-1, piston rod 5-2 in the cylinder body.With reference to accompanying drawing 2, the top pressing system user mode schematic diagram of large powder press, the principle of specific implementation roof pressure is as follows:
Roof pressure oil cylinder 5 oppositely is installed in the recessed crossbeam 8, and piston rod 5-2 stretches out.The main pressure has two tooth covers 11 on the beam 10, be connected with two limited blocks 9 below the tooth cover 11, the realization of roof pressure is moving downward by main pressure beam 10, be pressed onto piston rod 5-2 up to limited block 9 and drive the down motion (as shown in Figure 2) together of recessed crossbeam 8, run into collision block 2 up to the roller reversal valve 3-2 that is fixed on recessed crossbeam 8 and make it commutation, open the hydraulic control mouth, roof pressure oil cylinder 5 begins to migrate.This moment, recessed crossbeam 8 arrived the pressing position, and the distance between main pressure beam 10 and the recessed crossbeam 8 equals the distance of limited block and its zero-bit.At this moment the main beam 10 of pressing is owing to the emptying of roof pressure oil cylinder 5 can continue to walk a segment distance downwards, and roof pressure oil cylinder piston 5-1 retraction up to pushing down recessed crossbeam 8, has so just been realized roof pressure.The distance of adjusting limited block 9 and zero-bit has just realized the adjusting of roof pressure stroke being referred to as the roof pressure guiding mechanism, and this cover mechanism mainly is by bevel gear, roller gear, and planet circular system transmission and screw rod are realized.
Concrete enforcement is as follows: the pressure with roof pressure safety valve 7 is set in 250bar earlier, the purpose of doing like this is to guarantee that oil cylinder 5 pressure are unlikely very big and damage oil cylinder by pressure, the position for preparing collision block 2 and roller reversal valve 3 then guarantees to make its commutation when the pressing position, again adjusting device is made zero, mix up spacing.So just finished roof pressure is regulated, the adjusting of roof pressure stroke is to drive adjusting rod and bevel gear by planet circular system, by roller gear and screw rod it is regulated again.
Claims (4)
1, a kind of top pressing system of large powder press is characterized in that the top pressing system structure comprises oil-in (1), collision block (2), roller reversal valve (3), check valve (4), roof pressure oil cylinder (5), hydraulic control one-way valve (6), roof pressure safety valve (7); Oil-in (1) links to each other with oil pump on the Hydraulic Station by oil pipe, collision block (2) device is on the lathe bed of dry powder press, roller reversal valve (3), hydraulic control one-way valve (6), roof pressure oil cylinder (5) installs on recessed crossbeam (8), and roof pressure safety valve (7) is arranged on the Hydraulic Station of dry powder press;
Collision block (2) adopts wedge structure to be fixed on the lathe bed, roller reversal valve (3) has change-over valve core (3-1), commutation roller (3-2), the roller reversal valve adopts the roller commutation, for two position three-way valve is provided with A, P, three connectors of R, the A mouth of roller reversal valve (3) links to each other with the hydraulic control mouth of hydraulic control one-way valve (6) when zero-bit, the P mouth outside of roller reversal valve (3) links to each other with the roof pressure oil cylinder, the P mouth of roller reversal valve (3) check valve (3-3) inner and in the roller commutation valve body links to each other, the R mouth of roller reversal valve links to each other with check valve (4), the A mouth is connected with the P mouth when collision block (2) makes the commutation of roller reversal valve, promptly be connected with roof pressure oil cylinder (5), the check valve (3-4) in the R mouth of roller reversal valve (3) and the roller change valve links to each other;
Hydraulic control one-way valve (6) is provided with A, B, three connectors of Z, and wherein the B mouth links to each other with oil-in (1), and the A mouth links to each other with roof pressure oil cylinder (5), and the Z mouth is the hydraulic control mouth, links to each other with roller reversal valve (3).
2, the top pressing system of large powder press according to claim 1 is characterized in that roof pressure safety valve (7) is an overflow valve, is arranged on the fluid pressure line of dry powder press Hydraulic Station.
3, the top pressing system of large powder press according to claim 1 is characterized in that roof pressure oil cylinder (5) is provided with two, is installed on the left and right two ends of recessed crossbeam (8) respectively.
4, according to the top pressing system of claim 1 or 3 described large powder press, it is characterized in that roof pressure oil cylinder (5) has cylinder body, device has piston (5-1), piston rod (5-2) in the cylinder body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620069304 CN2915485Y (en) | 2006-02-15 | 2006-02-15 | Top pressure system of large scale powder press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620069304 CN2915485Y (en) | 2006-02-15 | 2006-02-15 | Top pressure system of large scale powder press |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2915485Y true CN2915485Y (en) | 2007-06-27 |
Family
ID=38186392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620069304 Expired - Lifetime CN2915485Y (en) | 2006-02-15 | 2006-02-15 | Top pressure system of large scale powder press |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2915485Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100364763C (en) * | 2006-02-15 | 2008-01-30 | 南京东部精密机械有限公司 | Top pressing system for large powder press |
| CN109663913A (en) * | 2018-10-30 | 2019-04-23 | 南京东田精密机械有限公司 | 16 tons of powder rapid shaping press |
-
2006
- 2006-02-15 CN CN 200620069304 patent/CN2915485Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100364763C (en) * | 2006-02-15 | 2008-01-30 | 南京东部精密机械有限公司 | Top pressing system for large powder press |
| CN109663913A (en) * | 2018-10-30 | 2019-04-23 | 南京东田精密机械有限公司 | 16 tons of powder rapid shaping press |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20080130 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |