CN201056063Y - Self-supercharging gas-liquid conversion top pressure system - Google Patents
Self-supercharging gas-liquid conversion top pressure system Download PDFInfo
- Publication number
- CN201056063Y CN201056063Y CNU200720110609XU CN200720110609U CN201056063Y CN 201056063 Y CN201056063 Y CN 201056063Y CN U200720110609X U CNU200720110609X U CN U200720110609XU CN 200720110609 U CN200720110609 U CN 200720110609U CN 201056063 Y CN201056063 Y CN 201056063Y
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- pressure
- oil cylinder
- liquid conversion
- air
- jacking
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Abstract
The utility model relates to a self-pressurized air-liquid conversion jacking-pressing system, which comprises a main press member and an air power device. The system is characterized in that an oil cylinder is arranged on the main press member; the piston rod of the oil cylinder protrudes downwards and contacts a female mold set of a powder forming machine; the oil cylinder is connected with an air-liquid conversion device through a hydraulic loop; the liquid-air conversion device is connected with the air power device; and a pressure adjusting device is arranged in the hydraulic loop. By adopting the technical scheme, the inner circulation loop of the system has simple structure, and the length of the piston rod protruding out of the oil cylinder can be adjusted to obtain different jacking journey by using the original air power device of the powder forming machine without additionally equipping an extra power device. The magnitude of the jacking pressure can be controlled by a pilot relief valve and a pressure gauge in the hydraulic loop. When the jacking pressure is larger than a set value, the pressure oil overflows to the air-liquid conversion device. The utility model has convenient and reliable adjustment of the jacking pressure and low cost.
Description
Affiliated field
The utility model relates to a kind of top pressing system of powder forming machine, and is particularly a kind of from supercharging gas-liquid conversion top pressing system.
Background technology
Powder forming machine generally has pressure process three times in the process of press forming part.After pressing process begins, at first powder is done to go up compacting for upper trimming die enters in the matrix cavity, i.e. compacting for the first time, the combination of upper trimming die and die moves downward synchronously then, because following punch die is fixed on the frame, this move downward synchronously equal down punch die upwards compacting promptly suppress for the second time to realize down compacting.For making the parts density uniformity after the compacting consistent better, will make upper trimming die do to go up compacting downwards, promptly compacting for the third time is also referred to as roof pressure.
Compacting for the third time, the generation principle that is roof pressure is: during the minimum point of upper trimming die when also the no show compacting is finished in second time pressing process, be in the compaction curve when beginning compacting 0 spend the 180 degree positions of compacting when finishing, make the die group move downward minimum point when compacting is finished in advance, and upper trimming die continues to move downward to minimum point, realize compacting, i.e. roof pressure for the third time.
The usual method that present roof pressure is taked is two kinds:
1, disk spring device: be contained in disk spring device in the main pressed part in pressing process because of having produced certain reaction by compression,, can force the die group is moved downward in advance to the compacting extreme lower position greatly after to a certain degree in reaction.
2, hydraulic means: the pressure oil that Hydraulic Station produces under the control of PLC and magnetic valve, moves to the compacting extreme lower position at setting-up time with the die group by oil pressure cylinder in advance.
More than two kinds of deficiencies that mode exists:
1, in the disk spring group device since disc spring film because of shape thickness error and the heat treated difference of steel; the spring pressure of its generation is very unstable; reached its fatigue limit soon because of tens thousand of times compression repeatedly every day simultaneously; its spring force is sharply decayed until disappearing (general 3-6 month service life); sometimes also can produce the broken phenomenon of rupture of spring leaf and cause the situation of machine intimate damage of components; often repair and replacement; shut down and stop work; reduced production efficiency, the user is not too satisfied to this.
2, hydraulic means: roof pressure power is more stable, but machine will increase by a cover hydraulic system, and the cost increase is bigger, and maintenance load increases simultaneously.
Summary of the invention
Technical problem to be solved in the utility model is: on the basis of the problem that overcomes above-mentioned prior art existence, providing a kind of is motive power with the original aerodynamic force of powder forming machine, and that realizes roof pressure changes top pressing system from the supercharging gas-liquid.
In order to solve the problems of the technologies described above, the utility model is by the following technical solutions: a kind of from supercharging gas-liquid conversion top pressing system, comprise main rolled-up stock, jet power unit, it is characterized in that: described main rolled-up stock is provided with an oil cylinder, the piston rod of oil cylinder stretch out downwards and with the die set of contact of powder forming machine, oil cylinder links to each other with the gas-liquid conversion equipment by a hydraulic circuit, and the gas-liquid conversion equipment links to each other with jet power unit, is provided with a pressure-regulating device in the described hydraulic circuit.
In order to solve the problems of the technologies described above, the utility model adopts following further technical scheme: described pressure-regulating device is by Pressure gauge, check valve, the precursor overflow valve in parallel with check valve of serial connection constitute successively in the hydraulic circuit.
Described piston rod stretches out the length of oil cylinder and the stroke of roof pressure is complementary.
After adopting technique scheme: closed circuit is simple in structure in the native system, utilizes the original jet power unit of powder make-up machine, need not dispose the extra power device, and the length that adjusting oil cylinder piston bar stretches out oil cylinder just can obtain different roof pressure strokes.The size of roof pressure power, regulate control by precursor overflow valve in the hydraulic circuit and Pressure gauge, when roof pressure power is excessive when surpassing setting value, pressure oil is got back in the gas-liquid conversion equipment with regard to overflow, and roof pressure power is easy to adjust reliable, and cost is lower, on the forming machine of different types of machines, use the practical innovation of back this system of proof, low cost, easy-maintaining, reliable and stable.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
The specific embodiment
Referring to Fig. 1, all use a lot of pneumatic operation elements on the powder forming machine, the device that the aerodynamic force source is arranged originally, the utility model is a motive power with the existing aerodynamic force of machine source exactly, concrete technical scheme is as follows: main rolled-up stock 1 is provided with an oil cylinder 2, the piston rod 3 of oil cylinder 2 stretches out downwards and contacts with the die group 4 of powder forming machine, oil cylinder 2 links to each other with gas-liquid conversion equipment 5 by a hydraulic circuit, gas-liquid conversion equipment 5 links to each other with the jet power unit (not shown), is provided with a pressure-regulating device in the described hydraulic circuit.Pressure-regulating device is by the Pressure gauge 6, check valve 7 of serial connection, the precursor overflow valve 8 in parallel with check valve 7 constitute successively in the hydraulic circuit.By gas-liquid conversion equipment 5, produce hydraulic power supply with aerodynamic force source uniform pressure, this hydraulic pressure oil enters pressure operating cylinder 2 through check valve 7, these operating cylinder 2 devices are on main pressed part 1, piston rod 3 is to stretch out downwards with die assembly 4 to contact, but be not connected, when upper trimming die 9 and pressed part 1 promotes die assembly 4 and moves downward synchronously, because of progressively compressing, downtrodden powder body material part produces increasing reaction force, this reaction force forces the compression of oil cylinder 2 pistons, its internal oil pressure is also increasing, when pressure increases to frictional force that can overcome die assembly 4 concave die walls and powder part and the summation that die returns cylinder force, roof pressure oil cylinder 2 can be depressed into the compacting lowest point with die assembly 4 in advance, and upper trimming die 9 is gone back no show compacting extreme lower position and is continued to move downward in intrinsic mechanical movement track, compacting, i.e. roof pressure have for the third time been finished.
Piston rod 3 stretches out the length of oil cylinder 2 and the stroke of roof pressure is complementary, and the length of stretching out oil cylinder 2 by adjusting oil cylinder piston bar 3 just can obtain different roof pressure strokes.The size of roof pressure power, can regulate control by precursor overflow valve in the hydraulic circuit 8 and Pressure gauge 6, when roof pressure power is excessive when surpassing this valve setting value, pressure oil is got back in the gas-liquid conversion cylinder with regard to overflow, and the setting value of overflow valve is according to the material of different compacted part and uses the maximum compacting tonnage of forming machine to choose:
It is setting pressure
Wherein F is for using the maximum press power of forming machine, and x is a coefficient
After compacting finished, upper trimming die 9 and pressed part 1 began to rise, and oil cylinder 2 pistons no longer are compressed power, and oil pressure also returns to the normal pressure of beginning, prepared the beginning of compacting circulation for the second time.
Claims (3)
1. one kind from supercharging gas-liquid conversion top pressing system, comprise main rolled-up stock (1), jet power unit, it is characterized in that: described main rolled-up stock (1) is provided with an oil cylinder (2), the piston rod (3) of oil cylinder (2) stretches out downwards and contacts with the die group (4) of powder forming machine, oil cylinder (2) links to each other with gas-liquid conversion equipment (5) by a hydraulic circuit, gas-liquid conversion equipment (5) links to each other with jet power unit, is provided with a pressure-regulating device in the described hydraulic circuit.
2. a kind of according to claim 1 from supercharging gas-liquid conversion top pressing system, it is characterized in that: described pressure-regulating device is by the Pressure gauge (6) of serial connection, check valve (7), the precursor overflow valve (8) in parallel with check valve (7) constitute successively in the hydraulic circuit.
3. a kind of as claimed in claim 1 or 2 from supercharging gas-liquid conversion top pressing system, it is characterized in that: described piston rod (3) stretches out the length of oil cylinder (2) and the stroke of roof pressure is complementary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720110609XU CN201056063Y (en) | 2007-06-13 | 2007-06-13 | Self-supercharging gas-liquid conversion top pressure system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720110609XU CN201056063Y (en) | 2007-06-13 | 2007-06-13 | Self-supercharging gas-liquid conversion top pressure system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201056063Y true CN201056063Y (en) | 2008-05-07 |
Family
ID=39424909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720110609XU Expired - Lifetime CN201056063Y (en) | 2007-06-13 | 2007-06-13 | Self-supercharging gas-liquid conversion top pressure system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201056063Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102514228A (en) * | 2011-11-30 | 2012-06-27 | 天通吉成机器技术有限公司 | Detection oil cylinder precompression balance and filling adjustment device of powder compacting equipment |
-
2007
- 2007-06-13 CN CNU200720110609XU patent/CN201056063Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102514228A (en) * | 2011-11-30 | 2012-06-27 | 天通吉成机器技术有限公司 | Detection oil cylinder precompression balance and filling adjustment device of powder compacting equipment |
| CN102514228B (en) * | 2011-11-30 | 2015-03-25 | 天通吉成机器技术有限公司 | Detection oil cylinder precompression balance and filling adjustment device of powder compacting equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080507 |