CN100364762C - Top pressing system for medium and small powder press - Google Patents
Top pressing system for medium and small powder press Download PDFInfo
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- CN100364762C CN100364762C CNB2006100382995A CN200610038299A CN100364762C CN 100364762 C CN100364762 C CN 100364762C CN B2006100382995 A CNB2006100382995 A CN B2006100382995A CN 200610038299 A CN200610038299 A CN 200610038299A CN 100364762 C CN100364762 C CN 100364762C
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Abstract
The present invention relates to a hydraulic top pressing system for medium-sized and small dry powder pressers for powder formation. The top pressing system comprises a gas-liquid sack, an overflow valve, a one-way valve, a valve plate and an oil cylinder, wherein the gas-liquid sack, the overflow valve, a pressure meter and the one-way valve are integrally assembled on the valve plate, the oil cylinder is fixed on a main pressure beam or a concave cross beam, an oil inlet of the oil cylinder is connected with an oil outlet of the valve plate through an oil pipe, a piston and a piston rod are installed in the oil cylinder, the gas-liquid sack is provided with a gas-liquid jar body in which hydraulic oil is filled, the upper part of the gas-liquid jar body is provided with an upper cover, and the gas-liquid jar body is provided with an air inlet, an oil outlet and an oil level display. The air inlet is connected with an air source through a pipeline, the oil outlet is connected to an oil inlet of the valve plate through a pipeline, and hydraulic lines are arranged in the valve plate; an overflow valve which is installed on the valve plate is communicated with the hydraulic lines on the valve plate, an inlet of the overflow valve is communicated with the oil cylinder through the hydraulic lines in the valve plate, and an outlet of the overflow valve is communicated with the gas-liquid sack through the hydraulic lines in the valve plate.
Description
Technical field
What the top pressing system of the medium and small dry powder press of the present invention related to is a kind of fluid pressure type top pressing system that is applicable to the dry powder press powder compacting.
Background technology
At present, middle-size and small-size dry 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 present medium and small press roof pressure, 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 present invention seeks to provide a kind of top pressing system of middle-size and small-size dry powder press at above-mentioned weak point, this system is that to be directed to middle or small 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 invention, 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 medium and small dry powder press takes following scheme to realize: the top pressing system of medium and small dry powder press comprises gas-liquid bag (airdraulic actuator), overflow valve, check valve, Pressure gauge, valve plate, oil cylinder.Gas-liquid bag, overflow valve, Pressure gauge, check valve is integrated is assembled on the valve plate, and oil cylinder is fixed on main the pressure on beam or the recessed crossbeam.The oil cylinder oil-in links to each other with the valve plate oil-out by oil pipe, and device has piston, piston rod in the oil cylinder.
The gas-liquid pack arrangement has the gas-liquid tank body, the interior device of gas-liquid tank body has hydraulic oil, gas-liquid tank body top is provided with loam cake, the gas-liquid tank body is provided with air inlet, oil-out, oil level monitor, air inlet links to each other with source of the gas (air compressor) by pipeline, oil-out links to each other with the valve plate oil-in by pipeline, is provided with fluid pressure line in the valve plate.
The overflow valve device is on valve plate, be connected with the fluid pressure line on the valve plate, overflow valve is the oil return valve of top pressing system, and overflow valve import (P) is connected with oil cylinder by fluid pressure line in the valve plate, and overflow valve outlet (D) is connected with the gas-liquid bag by fluid pressure line in the valve plate.
Check valve apparatus is on valve plate, check valve inlet contracts out hydraulic fluid port by fluid pressure line on the valve plate and gas-liquid and is connected, check valve outlet is connected with oil cylinder by the fluid pressure line on the valve plate, and pressure meter device is being connected with the oil-out of fluid pressure line on the valve plate on the valve plate.
Operation principle is as follows:
This cover system is to provide power source by gas-liquid bag (airdraulic actuator), and overflow valve and check valve are as control element, and oil cylinder is an executive component.Hydraulic oil serves as that medium realizes.Hydraulic schematic diagram is as follows:
Source of the gas (compressed air) serves as power hydraulic oil is charged into oil cylinder by check valve, and oil cylinder lower end piston rod stretches out, and meanwhile main pressure beam moves downward with eccentric wheel, realizes precompressed.
When main pressure beam is pressed onto recessed crossbeam, at this moment because the relation of check valve is arranged, hydraulic oil in the oil cylinder can only flow to gas-liquid bag (airdraulic actuator) by overflow valve, and the setting of the opening pressure of overflow valve will be much larger than back-moving spring or reset cylinder, main like this pressure beam will be with recessed crossbeam to walk downward together, and this moment, oil cylinder piston still stretched out, and realized compacting synchronously.
When recessed crossbeam was pushed down support slipper, recessed crossbeam arrived the compacting lower limit.And this moment, main the pressure also had one section distance that piston rod stretches out between beam and the recessed crossbeam, the main beam of pressing does not reach bottom dead centre, continue to move downward, but recessed crossbeam is pressed support slipper again and props up, at this moment the pressure in the oil cylinder will increase rapidly, so that greater than the opening pressure of overflow valve, overflow valve is opened.Hydraulic oil is by overflow valve return-air liquid bag (airdraulic actuator), and piston rod is withdrawn, and the main beam of pressing continues to walk a segment distance downwards, and this distance is exactly the roof pressure stroke.Thereby realized roof pressure.
Along with the beginning of the demoulding, main beam and the recessed crossbeam of pressing separates, and source of the gas serves as power source once more, and hydraulic oil is charged into oil cylinder, and piston rod stretches out.Wait for roof pressure next time, roof pressure working cycles has just been finished like this.
The method of this realization roof pressure 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.This system is integrated in the casing outside by valve plate, also brings great convenience for maintenance.This top pressing system also has a very big advantage: the front is mentioned after the roof pressure end demoulding begins, the main pressure between beam and the recessed crossbeam apart from widening, if at this moment use the dish spring, just begin the dish spring and be in compressive state, when distance widens, the power of dish spring is still very big, and this power is added on the recessed crossbeam, and recessed crossbeam is because the disengaging of compacting support slipper can lose support force.And if disc spring force is still greater than the die reset force at this moment, die will be subdued by the dish spring.Cause the machine asynergia.Will produce waste product when serious.Adopt hydraulic system of the present invention, behind the piston rod retraction, the oil cylinder topping up realizes that by Pneumatic pressure Pneumatic pressure is much smaller than the die reset force, and the action to machine can not have any impact like this.
The roof pressure technology is to realize the key of two-way three compact techniques, top pressing system of the present invention is that medium and small dry 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.Top pressing system of the present invention is suitable for the supporting uses of the medium and small dry powder press of relevant industries such as magnetic material, carbide alloy, powder metallurgy, electronic ceramics.
Description of drawings
The invention will be further described below with reference to accompanying drawing.
Fig. 1 is the hydraulic schematic diagram of the top pressing system of medium and small dry powder press.
Fig. 2 is the top pressing system structure and the user mode schematic diagram of medium and small dry powder press.
Fig. 3 is the valve board structure schematic diagram of the top pressing system of medium and small dry powder press.
With reference to accompanying drawing 1,2,3, the top pressing system of medium and small dry powder press comprises gas-liquid bag (airdraulic actuator) 1, overflow valve 3, Pressure gauge 4, check valve 2, valve plate 6, oil cylinder 5.Gas-liquid bag 1, overflow valve 3, Pressure gauge 4, check valve 2 integrated being assembled on the valve plate 6, oil cylinder 5 are fixed on main the pressure on beam 8 or the recessed crossbeam 11.Oil cylinder 5 oil-ins link to each other with valve plate 6 oil-out 6-12 by oil pipe 7, and device has piston 9, piston rod 10 in the oil cylinder 5.
Gas-liquid bag 1 structure has the interior device of gas-liquid tank body 1-1, gas-liquid tank body 1-1 hydraulic oil is arranged, gas-liquid tank body 1-1 top is provided with loam cake 1-2, gas-liquid tank body 1-1 is provided with air inlet 1-3, oil-out 1-5, oil level monitor 1-4, air inlet 1-3 links to each other with source of the gas (air compressor) by pipeline, oil-out 1-5 links to each other with valve plate 6 oil-in 6-13 by pipeline, is provided with fluid pressure line 6-2,6-3 in the valve plate 6.
The application of top pressing system on 16 tons of A swaging machines with reference to accompanying drawing 2 medium and small dry powder press: gas-liquid bag 1, overflow valve 3, check valve 2, Pressure gauge 4 are integrated being assembled on the valve plate 6, oil cylinder 5 is fixed on main the pressure on the beam 8, shown in the figure is the position that roof pressure begins, recessed crossbeam 11 has been pressed support slipper and has propped up, main beam 8 segment distance that under eccentric effect, also walks downward of pressing, at this moment overflow valve 3 is opened, and piston rod 10 withdrawals realize roof pressure.
Top pressing system of the present invention is installed in outside the lathe bed of medium and small dry powder press by the integrated assembling of valve plate, has and keeps in repair advantage eaily.Top pressing system of the present invention is long service life not only, has more prolonged the life-span of medium and small dry powder press, and stability is good, has guaranteed that also the action of medium and small dry powder press realizes.
Claims (3)
1. the top pressing system of a medium and small dry powder press is characterized in that top pressing system comprises gas-liquid bag, overflow valve, check valve, valve plate, oil cylinder; Gas-liquid bag, overflow valve, Pressure gauge, check valve is integrated is assembled on the valve plate, and oil cylinder is fixed on main the pressure on beam or the recessed crossbeam, and the oil cylinder oil-in links to each other with the valve plate oil-out by oil pipe, and the interior device of oil cylinder has piston, piston rod;
The gas-liquid pack arrangement has the gas-liquid tank body, the interior device of gas-liquid tank body has hydraulic oil, gas-liquid tank body top is provided with loam cake, the gas-liquid tank body is provided with air inlet, oil-out, oil level monitor, air inlet links to each other with source of the gas by pipeline, oil-out links to each other with the valve plate oil-in by pipeline, is provided with fluid pressure line in the valve plate;
The overflow valve device is on valve plate, be connected with the fluid pressure line on the valve plate, overflow valve is the oil return valve of top pressing system, and overflow valve import (P) is connected with oil cylinder by fluid pressure line in the valve plate, and overflow valve outlet (D) is connected with the gas-liquid bag by fluid pressure line in the valve plate;
Check valve apparatus is on valve plate, and check valve inlet contracts out hydraulic fluid port by fluid pressure line on the valve plate and gas-liquid and is connected, and the check valve outlet is connected with oil cylinder by the fluid pressure line on the valve plate;
Valve plate has the valve plate body, the valve plate body is provided with two fluid pressure lines, be respectively equipped with overflow valve oil-in, overflow valve oil-out, check valve oil-in, check valve oil-out, Pressure gauge connector on the valve plate body, also be provided with gas-liquid bag installing hole on the valve plate body, the overflow valve installing hole, the check valve installing hole.
2. the top pressing system of medium and small dry powder press according to claim 1 is characterized in that pressure meter device is being connected with the oil-out of fluid pressure line on the valve plate on the valve plate.
3. the top pressing system of medium and small dry powder press according to claim 1 is characterized in that overflow valve adopts precursor overflow valve or directly moving overflow valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100382995A CN100364762C (en) | 2006-02-15 | 2006-02-15 | Top pressing system for medium and small powder press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100382995A CN100364762C (en) | 2006-02-15 | 2006-02-15 | Top pressing system for medium and small powder press |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1810499A CN1810499A (en) | 2006-08-02 |
| CN100364762C true CN100364762C (en) | 2008-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100382995A Ceased CN100364762C (en) | 2006-02-15 | 2006-02-15 | Top pressing system for medium and small powder press |
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| Country | Link |
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| CN (1) | CN100364762C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775725B (en) * | 2014-02-20 | 2017-02-22 | 特福隆（上海）科技有限公司 | Pneumatic control operation module |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5752598A (en) * | 1980-09-16 | 1982-03-29 | Kobe Steel Ltd | Control method of pressure for powder forming press |
| JPS58181803A (en) * | 1982-04-19 | 1983-10-24 | Mitsubishi Metal Corp | Compresson-molding apparatus |
| JPH05269600A (en) * | 1991-12-27 | 1993-10-19 | Tamagawa Mach Kk | Die control speed ratio changing device in powder compacting press |
| JPH09239597A (en) * | 1996-03-08 | 1997-09-16 | Yoshitsuka Seiki:Kk | Powder molding press |
| CN2320404Y (en) * | 1998-01-26 | 1999-05-26 | 许云灿 | Simple two-way pressing full-automatic dry powder press |
| CN2717676Y (en) * | 2004-06-25 | 2005-08-17 | 陈建东 | Moulding top pressing mechanism for powder moulding press |
| CN2866125Y (en) * | 2006-02-15 | 2007-02-07 | 南京东部精密机械有限公司 | Prepressing system for middle and small size dry powder press |
-
2006
- 2006-02-15 CN CNB2006100382995A patent/CN100364762C/en not_active Ceased
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5752598A (en) * | 1980-09-16 | 1982-03-29 | Kobe Steel Ltd | Control method of pressure for powder forming press |
| JPS58181803A (en) * | 1982-04-19 | 1983-10-24 | Mitsubishi Metal Corp | Compresson-molding apparatus |
| JPH05269600A (en) * | 1991-12-27 | 1993-10-19 | Tamagawa Mach Kk | Die control speed ratio changing device in powder compacting press |
| JPH09239597A (en) * | 1996-03-08 | 1997-09-16 | Yoshitsuka Seiki:Kk | Powder molding press |
| CN2320404Y (en) * | 1998-01-26 | 1999-05-26 | 许云灿 | Simple two-way pressing full-automatic dry powder press |
| CN2717676Y (en) * | 2004-06-25 | 2005-08-17 | 陈建东 | Moulding top pressing mechanism for powder moulding press |
| CN2866125Y (en) * | 2006-02-15 | 2007-02-07 | 南京东部精密机械有限公司 | Prepressing system for middle and small size dry powder press |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1810499A (en) | 2006-08-02 |
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Decision date of declaring invalidation: 20101216 Decision number of declaring invalidation: 15762 Granted publication date: 20080130 |