CN1799724A - Control method of digital complete hydraulic die forging hammer - Google Patents
Control method of digital complete hydraulic die forging hammer Download PDFInfo
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- CN1799724A CN1799724A CN 200510107243 CN200510107243A CN1799724A CN 1799724 A CN1799724 A CN 1799724A CN 200510107243 CN200510107243 CN 200510107243 CN 200510107243 A CN200510107243 A CN 200510107243A CN 1799724 A CN1799724 A CN 1799724A
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Abstract
The invention relates to a method for controlling the closing time of pilot valve of beating valve to accurately control the beating energy, which can be used on the digital-control hydrodynamic die hammer. The invention uses high-precision pressure sensor to control the pressure of hydrodynamic oil-line between 15-25MPa; sets different beating energies according to the elements which are needed to be forged; sets different beating time according to the different beating energies while the beating time equals the closing time of pilot time; when in the situation of maximum travel, the beating energy is set as zero, the beating time is arranged between 50-150ms, and the beating time will increase 0.1-3ms while the beating energy increases each 1000j to attain maximum beating energy. Since the invention realizes digital control on the beating energy and processes, the needed energy of forging is confirmed without additional impact energy, and the service lives of key elements as hammer rod, hammer head and mould are improved with stable forging quality.
Description
Technical field
The invention belongs to the forging equipment technical field of metal forming, relate in particular to a kind of control method that realizes the digital complete hydraulic die forging hammer that blow energy is accurately controlled by the length of controlling the pilot valve closing time of hitting valve.
Background technology
Domestic existing die hammer can be divided into steam and air stamping hammer, liquid gas die hammer, plain edition complete hydraulic die forging hammer.Steam and air stamping hammer is with steam or the compressed air hammer as driving medium, because during the air inlet of control valve control cavity of resorption (or epicoele), epicoele (or cavity of resorption) exhaust simultaneously, so energy utilization rate is very low.Liquid gas die hammer epicoele is the high pressure nitrogen of sealing, hits valve and controls cavity of resorption separately, and oil extraction is hit, hammer is carried in oil-feed, because cavity of resorption need be built pressure carrying hammer moment again, therefore vexed mould phenomenon is arranged, the master cylinder epicoele is an air cavity simultaneously, and cavity of resorption is an oil pocket, oil gas takes place easily scurry phenomenon mutually.Steam and air stamping hammer and liquid gas die hammer all are to hit by the Artificial Control tup highly to realize energy control, and this operation and workman's qualification have much relations, even if the skilled worker, the homogeneity of product that forges is also very poor.Though the plain edition complete hydraulic die forging hammer is a master cylinder upper and lower cavity medium all is hydraulic oil, hitting valve is not combination valve, is split-body valve, and controlled by the one-level pilot valve, can't realize the accurate control of blow energy.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art and provide a kind of blow energy can realize the control method of the digital complete hydraulic die forging hammer of Digital Control.
Technical solution of the present invention is:
At first, the pressure in the hydraulic circuit is controlled between the 15Mpa-25Mpa by high-precision pressure sensor,
Secondly, set different blow energies according to forging different parts, needs according to different blow energies are set the different strike time, and the closing time that the strike time is hit the pilot valve of valve for control is determined blow energy according to the cross section of forging parts, under the range, when blow energy was zero, the control strike time was between the 50-150 millisecond, 1000 joules of the every increases of blow energy, the strike time increases the 0.1-3 millisecond, until obtaining maximum blow energy.
The closing time of pilot valve is the conduction time that is arranged on the magnetic valve on the pilot valve, the part of each forging then promptly hit by this setting and finished by at touch-screen each blow energy being set in advance on the screen with time form according to the above ratio the conduction time of magnetic valve.
Advantage of the present invention: because the blow energy and the hitting process of this hammer realized numerical control, therefore not only guaranteed the energy that forging is required but also do not produced extra impact kinetic energy, so some key components and parts such as hammer stem, tup and the life-span of mould improves greatly up and down.Because hitting process has been realized numerical control, the forging process of various forging can deposit in to access as required at any time in the digital control system and use, therefore can obtain consistent blow energy and cycle with a kind of forging, avoided manually-operated diversity, so forging quality be comparatively stable.
Description of drawings
Fig. 1 is a hydraulic means schematic diagram of the present invention.
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples:
Accompanying drawing has been described hydraulic means schematic diagram of the present invention.In the drawings, hydraulic means of the present invention comprises master cylinder 1, be arranged on the hammer stem piston 2 that in the master cylinder master cylinder is divided into epicoele and cavity of resorption, the cavity of resorption of master cylinder 1 and accumulator 3 often switch on, the epicoele of master cylinder 1 is connected with accumulator 3 and fuel tank 5 by hitting valve 4, when carrying hammer, hitting valve 4 connects with fuel tank 5, during strike, hitting valve 4 connects with accumulator 3, hit valve 4 and have two position four-way valves of controlling oil circuit for two ends, two oil-ins that hit valve 4 connect two oil circuits of master cylinder 1 epicoele respectively, and two oil-outs of strike valve 4 are connected tank 5 and accumulator 3 respectively, hit the control oil circuit difference turn-on accumulator 3 and secondary pilot valve 6 working connections at valve 4 two ends, secondary pilot valve 6 is a two-position three-way valve, one-level pilot valve 7 is a two-position three-way valve, one-level pilot valve 7 control secondary pilot valves 6, and valve 4 is hit in 6 controls of secondary pilot valve.
Described one-level pilot valve 7 is that an end has back-moving spring, and the other end is the two-position three-way valve of magnetic valve, 7 commutations of solenoid control one-level pilot valve, and the control oil circuit of the working connection of one-level pilot valve 7 and secondary pilot valve 6 is connected.Described secondary pilot valve 6 has the two-position three-way valve of controlling oil circuit for two ends, the control oil circuit of one end and accumulator 3 are connected, the control oil circuit of the other end and the working connection of one-level pilot valve 7 are connected, and the working connection of secondary pilot valve 6 is connected with the control oil circuit that hits valve 4 one ends.Be provided with main oil pump 8 in fuel tank 5, main oil pump 8 is provided with unloader 9, adjusts valve 10 with the oil circuit of accumulator 3, and unloader 9 and adjustment valve 10 are connected in parallel in this oil circuit.In the oil circuit that master cylinder 1 cavity of resorption and accumulator 3 often switch on, be provided with safety valve 11.
In the drawings, hit valve and controlled by the two-stage pilot valve, digitization system hits the pilot valve closing time of valve by control length realizes that energy accurately controls, and the control time is at Millisecond, energy deviation is not more than ± and 1.5%.Concrete control method is exemplified below:
Embodiment 1: the part that a kind of required maximum blow energy is 50 kilojoules, and concrete control method is as follows:
At first, the pressure in the whole hydraulic circuit is controlled between the 19.5Mpa-20.5Mpa by high-precision pressure sensor,
Secondly, according to blow energy is that 50 kilojoules are set the strike time, this strike time is the conduction time of the magnetic valve of the pilot valve of control strike valve, under the range, when blow energy was zero, the control strike time was between the 100-120 millisecond, 1000 joules of the every increases of blow energy, the strike time increases the 0.1-3 millisecond, so the strike time of this part is defined as can reaching maximum blow energy between the 160-200 millisecond.The closing time of pilot valve is 160-200 millisecond conduction time that is arranged on the magnetic valve on the pilot valve, at touch-screen 160-200 millisecond conduction time of magnetic valve is converted into maximum blow energy and is set in advance on the screen, the part of each forging then promptly hits by this setting and finishes.
Embodiment 2: the part that a kind of required maximum blow energy is 25 kilojoules, and concrete control method is as follows:
At first, the pressure in the whole hydraulic circuit is controlled between the 15Mpa-25Mpa by high-precision pressure sensor,
Secondly, according to blow energy is that 25 kilojoules are set the strike time, this strike time is the conduction time of the magnetic valve of the pilot valve of control strike valve, under the range, when blow energy was zero, the control strike time was between the 50-100 millisecond, 1000 joules of the every increases of blow energy, the strike time increases the 0.1-3 millisecond, so the strike time of this part is defined as can reaching maximum blow energy between the 100-160 millisecond.The closing time of pilot valve is 100-160 millisecond conduction time that is arranged on the magnetic valve on the pilot valve, at touch-screen 100-160 millisecond conduction time of magnetic valve is converted into maximum blow energy and is set in advance on the screen, the part of each forging then promptly hits by this setting and finishes.
Determine that according to the cross section of forging parts blow energy calculates by empirical equation.
Claims (3)
1, a kind of control method of digital complete hydraulic die forging hammer is characterized in that:
At first, the pressure in the hydraulic circuit is controlled between the 15Mpa-25Mpa by high-precision pressure sensor,
Secondly, set different blow energies according to forging different parts, needs according to different blow energies are set the different strike time, the closing time that the strike time is hit the pilot valve of valve for control is under the range, when blow energy is zero, the control strike time is between the 50-150 millisecond, 1000 joules of the every increases of blow energy, the strike time increases the 0.1-3 millisecond, until obtaining maximum blow energy.
2, the control method of a kind of digital complete hydraulic die forging hammer according to claim 1, it is characterized in that: the closing time of pilot valve is the conduction time that is arranged on the magnetic valve on the pilot valve, the part of each forging then promptly hit by this setting and finished by at touch-screen each blow energy being set in advance on the screen with time form according to the above ratio the conduction time of magnetic valve.
3, the control method of a kind of digital complete hydraulic die forging hammer according to claim 1 is characterized in that: the optimum pressure in the hydraulic circuit is controlled at 19.5Mpa-20.5Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510107243 CN1799724A (en) | 2005-12-06 | 2005-12-06 | Control method of digital complete hydraulic die forging hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510107243 CN1799724A (en) | 2005-12-06 | 2005-12-06 | Control method of digital complete hydraulic die forging hammer |
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| CN1799724A true CN1799724A (en) | 2006-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200510107243 Pending CN1799724A (en) | 2005-12-06 | 2005-12-06 | Control method of digital complete hydraulic die forging hammer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102357636A (en) * | 2011-08-23 | 2012-02-22 | 山东理工大学 | Striking force error control method of pressed piece |
| CN102357630A (en) * | 2011-08-23 | 2012-02-22 | 山东理工大学 | Numerical control forming method of hot die forging |
| CN102688968A (en) * | 2012-06-15 | 2012-09-26 | 辽宁工程技术大学 | Hydraulic air hammer controlling device |
| CN108188316A (en) * | 2018-04-04 | 2018-06-22 | 安阳锻压数控设备有限公司 | The equipment systems and production technology of a kind of forged steel ball |
-
2005
- 2005-12-06 CN CN 200510107243 patent/CN1799724A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102357636A (en) * | 2011-08-23 | 2012-02-22 | 山东理工大学 | Striking force error control method of pressed piece |
| CN102357630A (en) * | 2011-08-23 | 2012-02-22 | 山东理工大学 | Numerical control forming method of hot die forging |
| CN102357630B (en) * | 2011-08-23 | 2013-06-12 | 山东理工大学 | Numerical control forming method of hot die forging |
| CN102357636B (en) * | 2011-08-23 | 2013-09-18 | 山东理工大学 | Striking force error control method of pressed piece |
| CN102688968A (en) * | 2012-06-15 | 2012-09-26 | 辽宁工程技术大学 | Hydraulic air hammer controlling device |
| CN102688968B (en) * | 2012-06-15 | 2014-04-02 | 辽宁工程技术大学 | Hydraulic air hammer controlling device |
| CN108188316A (en) * | 2018-04-04 | 2018-06-22 | 安阳锻压数控设备有限公司 | The equipment systems and production technology of a kind of forged steel ball |
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