CN103008520A - Pressure control device of large free forging hydraulic press - Google Patents
Pressure control device of large free forging hydraulic press Download PDFInfo
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- CN103008520A CN103008520A CN201310020664XA CN201310020664A CN103008520A CN 103008520 A CN103008520 A CN 103008520A CN 201310020664X A CN201310020664X A CN 201310020664XA CN 201310020664 A CN201310020664 A CN 201310020664A CN 103008520 A CN103008520 A CN 103008520A
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Abstract
The invention relates to a pressure control device of a large free forging hydraulic press. The pressure control device comprises a main distributor, water inlet valves and drainage valves which are led to a multi-stage working cylinder are arranged in the main distributor, on and off of the water inlet valves are completed through guide rods, a stage-variable oil cylinder controlled by an electromagnetic valve is mounted on each the guide rod, and on and off of each water inlet valve is controlled by extending and retracting of the corresponding stage-variable oil cylinder. The pressure control device has the advantages that forging pressure of the press can be flexibly changed by selecting desirable pressure as required, a control pendulum shaft of the main distributor does not need to return to the zero position, pressure relief of the working cylinder is not needed, and the pressure control device is free of limitation of any conditions, convenient to operate, energy-saving, safe, reliable, simple in structure and capable of reducing heating and improving work efficiency.
Description
Technical field
This patent belongs to the pressure control field of hydraulic press, particularly relates to the pressure control device that a kind of large free forging is made hydraulic press.
Background technology
The large free forging of China is made hydraulic press at present, generally all be designed to the triplex structure form, the advantage of this structure is to obtain three stage pressures, reduce the consumption of highly pressurised liquid, the control balance staff of main allocated equipment clack box mostly drives control with servo motor or servoBcylinder, open each valve working according to the angular dimension of balance staff, liquid just can enter working cylinder by these valves.
It is to be adjusted to a certain working cylinder with the mechanical system device before compacting that normally used pressure becomes the level scheme.The method of mechanical system implement device adjustment is to change control balance staff and the change level push rod distance of distributing between the valve rod, sets by preliminary election to become a grade push rod distance, moves horizontally the position, both are contacted and does not contact.The shortcoming of this method is the operating pressure that can not change again the press of choosing in advance in forging process, if therefore will change pressure, then the main allocated equipment balance staff is transferred to stop position again, make and suppress the pressure of laying down in the relevant work cylinder, then move horizontally a change level push rod position, connect again the working cylinder of high first class pressure.This transform method is understood time expand, and cause energy loss (consumption water under high pressure) owing to will in the whole system of press, again boosting, or from impulse stroke at the beginning, just suppress with higher leveled pressure, and at this moment resistance of deformation is very little, and the pressure of working cylinder is also just very little.Because the resistance of deformation of forging is along with the cross section constantly changes.So the pressure in the accumulator and the difference of working cylinder are exactly the energy loss of the whole hydraulic system of press, pressure is low in the working cylinder, and the efficient of press is just very low.This will cause the excessive waste of highly pressurised liquid energy, and this energy all is converted to heat energy, and it must be taken away from hydraulic system by cooler, brings thus a series of energy loss.
Summary of the invention
The pressure control device that this patent provides a kind of large free forging to make hydraulic press for solving the technical problem that exists in the known technology, this pressure control device can be when main allocated equipment be controlled balance staff and needn't be recovered zero-bit just can changing multi-stage pressure, adjust flexibly.
A kind of large free forging is made the pressure control device of hydraulic press, comprise main allocated equipment, be provided with the first row water valve in the main allocated equipment, the second water intaking valve, the 3rd draining valve, the 4th water intaking valve, the second water intaking valve wherein, the entrance of the 4th water intaking valve links to each other with the high pressure water, the outlet of the second water intaking valve links to each other with the entrance of first row water valve, the outlet of the 4th water intaking valve links to each other with the entrance of the 3rd draining valve, the outlet of the second water intaking valve also links to each other with the both sides working cylinder, the outlet of the 4th water intaking valve also links to each other with middle working cylinder, the first row water valve, the outlet of the 3rd draining valve links to each other with the low pressure backwater, also include the control balance staff, the control balance staff is connected with the control fork, the control fork comprises the first control fork and the second control fork, the both ends of the first control fork and the second control fork also all are connected with guide rod, the first control fork both ends are connected with the first guide rod and the second guide rod, the second control fork both ends are connected with the 3rd guide rod and the 4th guide rod, the first guide rod contacts with the valve rod of first row water valve with first row water valve conllinear and when moving, the 3rd guide rod contacts with the valve rod of the 3rd draining valve with the 3rd draining valve conllinear and when moving, the 4th guide rod and the 4th draining valve conllinear, the second guide rod and second row water valve conllinear
It is characterized in that: contact by the valve rod that becomes level oil cylinder and the 4th draining valve when moving on the 4th guide rod, the second guide rod contacts by the valve rod that becomes level oil cylinder and second row water valve, becomes the level oil cylinder and links to each other with oil circuit control.
This patent can also be by the following technical solutions:
Described change level oil cylinder is controlled by two position and four-way reversing valves by change-over switch.
Described change level oil cylinder comprises the gland that is fixedly connected on the cylinder body top, be coated with the piston rod that is slidingly connected in the gland, be provided with seal between piston rod and cylinder body, the gland, the afterbody of cylinder body is connected with guide post, guide post is installed in the fairlead in the mode that endwisely slips, circumferentially fix, the tail end of guide post by be through bearing pin on the roller rolling friction be connected and realize and being connected of the 3rd guide rod or the 4th guide rod, described bearing pin is positioned at the upper end of the 3rd guide rod or the 4th guide rod.
Advantage and good effect that this patent has are:
Because this patent adopts technique scheme, can select on demand desired pressure to come flexible transformation press forging pressure, main allocated equipment control balance staff needn't recover zero-bit, working cylinder needn't release, be not subjected to any condition restriction, easy to operate, energy savings reduces heating, safe and reliable, simple in structure, raising work efficiency.
Description of drawings
Fig. 1 is the structural representation of this patent;
Fig. 2 is the hydraulic schematic diagram of the change level oil pump of this patent;
Fig. 3 is the structural representation of the change level oil pump of this patent;
Fig. 4 is the right view of Fig. 3.
The specific embodiment
For further understanding summary of the invention, the Characteristic of this patent, hereby exemplify following examples, and cooperate accompanying drawing to be described in detail as follows:
See also Fig. 1 to Fig. 2,
A kind of large free forging is made the pressure control device of hydraulic press, comprise main allocated equipment 7, be provided with first row water valve 1 in the main allocated equipment, the second water intaking valve 2, the 3rd draining valve 3, the 4th water intaking valve 4, the second water intaking valve wherein, the entrance of the 4th water intaking valve links to each other with high pressure water 18, the outlet of the second water intaking valve links to each other with the entrance of first row water valve, the outlet of the 4th water intaking valve links to each other with the entrance of the 3rd draining valve, the outlet of the second water intaking valve also links to each other with the pipeline 19 that leads to the both sides working cylinder, the outlet of the 4th water intaking valve also links to each other with middle working cylinder 20, the first row water valve, the outlet of the 3rd draining valve links to each other with low pressure backwater 8, also include control balance staff 10, the control balance staff is connected with the control fork, the control fork comprises the first control fork 12 and the second control fork 13, the both ends of the first control fork and the second control fork also all are connected with guide rod, the first control fork both ends are connected with the first guide rod 9 and the second guide rod 14, the second control fork both ends are connected with the 3rd guide rod 15 and the 4th guide rod 17, the first guide rod contacts with the valve rod of first row water valve with first row water valve conllinear and when moving, the 3rd guide rod contacts with the valve rod of the 3rd draining valve with the 3rd draining valve conllinear and when moving, the 4th guide rod and the 4th draining valve conllinear, the second guide rod and second row water valve conllinear, contact by the valve rod that becomes level oil cylinder and the 4th draining valve when moving on the 4th guide rod, the second guide rod contacts by the valve rod that becomes level oil cylinder and second row water valve, becomes the level oil cylinder and links to each other with oil circuit control.Wherein, what be installed in the second guide rod top is first a change level oil cylinder 11, and what be installed in the 4th guide rod top is second a change level oil cylinder 16.
Among Fig. 2, become the level oil cylinder by change-over switch by the control of two position and four-way reversing valves, two of solenoid control become in the level oil cylinders commutation with high-pressure oil passage and low pressure oil way.
See also Fig. 3 and Fig. 4, become the level oil cylinder and comprise the gland 111 that is fixedly connected on the cylinder body top, be coated with the piston rod 112 that is slidingly connected in the gland, piston rod and cylinder body, be provided with seal 113 between the gland, the afterbody of cylinder body is connected with guide post 114, guide post is to endwisely slip, circumferentially fixing mode is installed in the fairlead 116, be installed in the fairlead by pin key 115 particularly, the tail end of guide post by be through bearing pin on roller 117 rolling friction be connected and realize and being connected of the 3rd guide rod or the 4th guide rod, bearing pin 118 is positioned at the upper end of the 3rd guide rod or the 4th guide rod.
The 5th draining valve 5 among the figure and the 6th water intaking valve 6 are communicated with the pipeline 21 that leads to lift cylinder, are used for the control lift cylinder and carry out the action opposite with the middle part working cylinder with the both sides working cylinder
The operating principle of this patent is:
When control balance staff swung put in place after, can select pressure rating by rotary sampling switch, thereby obtain different pressure.Realizing not resetting, it is as shown in the table to change pressure, when selecting the one-level forging pressure, and the DT4 of Fig. 2, DT7 gets electric, and first becomes the level cylinder piston rod stretches out, and second becomes the level cylinder piston rod retracts, open the 4th water intaking valve of Fig. 1 during pressurization, middle working cylinder advances water under high pressure, obtains first class pressure.
The DT5 of Fig. 2 when selecting the secondary forging pressure, DT6 gets electric, and first becomes the level cylinder piston rod returns, and second becomes the level cylinder piston rod stretches out, and opens the 2# water intaking valve of Fig. 1 during pressurization, and the both sides working cylinder advances water under high pressure, obtains secondary pressure.
When selecting three grades of forging pressures, the DT5 of Fig. 2, DT7 gets electric, first becomes the level cylinder piston rod stretches out, and second becomes the level cylinder piston rod stretches out, and opens simultaneously 2# and the 4# water intaking valve of Fig. 1 during pressurization, middle working cylinder and both sides working cylinder advance water under high pressure simultaneously, obtain three stage pressures.
The DT4 of Fig. 2 when when equipment is adjusted test run or catastrophic failure, selecting 0 grade of forging pressure; DT6 gets electric; first becomes the level cylinder piston rod returns; second becomes the level cylinder piston rod returns; although balance staff still can not be opened 2# and the 4# water intaking valve of Fig. 1 at pressing position; middle working cylinder and both sides working cylinder do not advance water under high pressure, can not obtain any pressure, so can shield to press.
Although the above is described the preferred embodiment of this patent by reference to the accompanying drawings; but this patent is not limited to the above-mentioned specific embodiment; the above-mentioned specific embodiment only is schematic; be not restrictive; those of ordinary skill in the art is under the enlightenment of this patent; not breaking away from the scope situation that this patent aim and claim protect, can also make a lot of forms, these all belong within the protection domain of this patent.
Claims (3)
1. a large free forging is made the pressure control device of hydraulic press, comprise main allocated equipment, be provided with the first row water valve in the main allocated equipment, the second water intaking valve, the 3rd draining valve, the 4th water intaking valve, the second water intaking valve wherein, the entrance of the 4th water intaking valve links to each other with the high pressure water, the outlet of the second water intaking valve links to each other with the entrance of first row water valve, the outlet of the 4th water intaking valve links to each other with the entrance of the 3rd draining valve, the outlet of the second water intaking valve also links to each other with the both sides working cylinder, the outlet of the 4th water intaking valve also links to each other with middle working cylinder, the first row water valve, the outlet of the 3rd draining valve links to each other with the low pressure backwater, also include the control balance staff, the control balance staff is connected with the control fork, the control fork comprises the first control fork and the second control fork, the both ends of the first control fork and the second control fork also all are connected with guide rod, the first control fork both ends are connected with the first guide rod and the second guide rod, the second control fork both ends are connected with the 3rd guide rod and the 4th guide rod, the first guide rod contacts with the valve rod of first row water valve with first row water valve conllinear and when moving, the 3rd guide rod contacts with the valve rod of the 3rd draining valve with the 3rd draining valve conllinear and when moving, the 4th guide rod and the 4th draining valve conllinear, the second guide rod and second row water valve conllinear
It is characterized in that: contact by the valve rod that becomes level oil cylinder and the 4th draining valve when moving on the 4th guide rod, the second guide rod contacts by the valve rod that becomes level oil cylinder and second row water valve, becomes the level oil cylinder and links to each other with oil circuit control.
2. pressure control device as claimed in claim 1 is characterized in that: described change level oil cylinder by change-over switch by the control of two position and four-way reversing valves.
3. pressure control device as claimed in claim 1, it is characterized in that: described change level oil cylinder comprises the gland that is fixedly connected on the cylinder body top, be coated with the piston rod that is slidingly connected in the gland, be provided with seal between piston rod and cylinder body, the gland, the afterbody of cylinder body is connected with guide post, guide post is installed in the fairlead in the mode that endwisely slips, circumferentially fix, the tail end of guide post by be through bearing pin on the roller rolling friction be connected and realize and being connected of the 3rd guide rod or the 4th guide rod, described bearing pin is positioned at the upper end of the 3rd guide rod or the 4th guide rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310020664.XA CN103008520B (en) | 2013-01-21 | 2013-01-21 | Pressure control device of large free forging hydraulic press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310020664.XA CN103008520B (en) | 2013-01-21 | 2013-01-21 | Pressure control device of large free forging hydraulic press |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103008520A true CN103008520A (en) | 2013-04-03 |
| CN103008520B CN103008520B (en) | 2015-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310020664.XA Expired - Fee Related CN103008520B (en) | 2013-01-21 | 2013-01-21 | Pressure control device of large free forging hydraulic press |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2927157A1 (en) * | 1979-07-05 | 1981-01-08 | Pahnke Eng Gmbh & Co Kg | FILLING SYSTEM FOR RAPID MOVEMENT ON HYDRAULIC PRESSES WITH DIRECT PUMP DRIVE |
| US20020062676A1 (en) * | 2000-11-30 | 2002-05-30 | Tsuneaki Yashima | Hydraulic control method for a trial hydraulic press |
| CN101007334A (en) * | 2007-02-13 | 2007-08-01 | 西南铝业（集团）有限责任公司 | Controlling system of moulded forging hydraulic press with proportional type oil controlling water |
| CN202571118U (en) * | 2012-04-12 | 2012-12-05 | 大连春洋重工机械制造有限公司 | Three-cylinder anisobaric large forging oil press |
| CN203091644U (en) * | 2013-01-21 | 2013-07-31 | 天津市天重江天重工有限公司 | Pressure control device of large-scale free forging hydraulic press |
-
2013
- 2013-01-21 CN CN201310020664.XA patent/CN103008520B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2927157A1 (en) * | 1979-07-05 | 1981-01-08 | Pahnke Eng Gmbh & Co Kg | FILLING SYSTEM FOR RAPID MOVEMENT ON HYDRAULIC PRESSES WITH DIRECT PUMP DRIVE |
| US20020062676A1 (en) * | 2000-11-30 | 2002-05-30 | Tsuneaki Yashima | Hydraulic control method for a trial hydraulic press |
| CN101007334A (en) * | 2007-02-13 | 2007-08-01 | 西南铝业（集团）有限责任公司 | Controlling system of moulded forging hydraulic press with proportional type oil controlling water |
| CN202571118U (en) * | 2012-04-12 | 2012-12-05 | 大连春洋重工机械制造有限公司 | Three-cylinder anisobaric large forging oil press |
| CN203091644U (en) * | 2013-01-21 | 2013-07-31 | 天津市天重江天重工有限公司 | Pressure control device of large-scale free forging hydraulic press |
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| Publication number | Publication date |
|---|---|
| CN103008520B (en) | 2015-02-04 |
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Granted publication date: 20150204 Termination date: 20180121 |
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