CN101664798A - Injection 'braking' device of die casting machine - Google Patents
Injection 'braking' device of die casting machine Download PDFInfo
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- CN101664798A CN101664798A CN200810198308A CN200810198308A CN101664798A CN 101664798 A CN101664798 A CN 101664798A CN 200810198308 A CN200810198308 A CN 200810198308A CN 200810198308 A CN200810198308 A CN 200810198308A CN 101664798 A CN101664798 A CN 101664798A
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Abstract
The invention discloses an injection 'braking' device of die casting machine, which can control the injection speed to reduce (commonly referred to as ' brake') at a preset position through simply common hydraulic control to avoid a huge injection impact force caused by an over-high speed at the end of injection operation, thereby reducing the casting fins of die cast products, avoiding die batchcarry-over caused by the injection impact force and protecting the die, an injection hammer tup and an injection connecting rod.
Description
Technical field
Patent of the present invention relates to a kind of material injection device of die casting machine, and particularly die cast product requires the material injection device of die casting machine that high speed shoots material.
Background technology
At present, most of homemade die casting machine is aspect the key performance of material injection device, some weak point also, wherein a bit be: for the die cast product of producing high request, die casting such as magnesium alloy die casting and thin-wall part and complicated shape, all need die casting machine that shooting material of high speed is provided, loading mould cavity in shorter time, satisfy the technological requirement of die cast product, and if shoot material at a high speed and last till terminations that shoot material, will the huge impulsive force that shoots material of generation, make the die cavity that originally closes produce certain separation, die cast product produces overlap, also can have influence on the service life of mould simultaneously, and the damage that causes the shoot material tup and the connecting rod that shoots material.This has just proposed new requirement to the material shooting process of die casting machine: before the end that shoots material, the speed that will shoot material lowers rapidly, reaches to fill type fast, does not produce impulsive force again, reduces the effect of goods overlap.At above requirement to die casting machine, though external advanced die casting machine possesses this function, its whole manufacturing cost is very high; And the material injection device of homemade die casting machine has embodied bigger advantage aspect manufacturing cost, but do not possess " brake " function, homemade die casting machine will increase " brake " function, normally adopt shoot material outlet throttling control of servo valve, reach the effect of " brake ", also needing increases very big cost, and servo valve is also higher to hydraulic oil and environment requirement, often owing to abominable die casting site environment produces fault.Patent of the present invention is to carry out local improvement on the basis of the existing material injection device of homemade die casting machine, only need adopt common hydraulic valve, can possess " brake " function.And kept homemade die casting machine low cost of manufacture, control simple advantage.
Summary of the invention
Patent of the present invention is innovated improvement on the basis of the material injection device of existing homemade die casting machine, only need use common hydraulic valve, can make die casting machine possess " braking " function of fast shot speed, has remedied the weak point of homemade die casting machine; While just slightly increases on manufacturing cost owing to patent use of the present invention all is common hydraulic valve, and hydraulic oil is not had special requirement yet, the reliable work of energy long-term stability.
The technical problem of patent of the present invention is implemented by the following technical programs: 1. the rodless cavity hydraulic fluid port at the oil cylinder that shoots material adopts the binary channels oil extraction, when injection speed need change low speed at a high speed, a pathway closure wherein, another passage is used for the throttling oil extraction, the final speed after the control speed that shoots material is changeed at a slow speed; 2. in order to control a wherein passage quick closedown, patent of the present invention has also been done innovative design in the control of this passage, one has used multistage amplification principle exactly, it two is exactly to adopt in electrical control switching value directly to control the electromagnetic valve coil outage, and need not export control again, thereby shortened the whole pathway closure time greatly through the computing of controller.
The enforcement of patent of the present invention can make homemade die casting machine realize " brake " function, play corresponding effect in high speed die casting application, help reducing the die cast product overlap and fly to expect phenomenon, prolong die life, the protection die casting tup and the connecting rod that shoots material.Its manufacturing cost is relatively low simultaneously, and selling price can be orientated popular price as, is vast die casting machine acceptable better quality products at good values per family.
Below in conjunction with drawings and Examples patent of the present invention is further specified:
Description of drawings
Fig. 1 is the hydraulic schematic diagram of patent of the present invention
Fig. 2 is the electric control theory figure of direction valve V4
The specific embodiment
Below in conjunction with above-mentioned accompanying drawing patented product of the present invention is described in detail again, present embodiment is an example with the high-speed configuration of the material injection device of homemade cold-chamber die casting machine 800T, its cylinder rod chamber oil-out that shoots material adopts the inserted valve of inside nominal diameter 63 to carry out oil extraction control, the maximum empty injection speed can surpass 8m/s, now adopt accompanying drawing 1 described scheme to be improved, make it possess " brake " function, relevant hydraulic valve type selecting is as follows:
Inserted valve V1:50 latus rectum, area was than 2: 1
Inserted valve V2:40 latus rectum, area possessed adjusting rod than 2: 1
Inserted valve V3:25 latus rectum, area was than 2: 1
Direction valve V4 and V5:6 latus rectum, two-position four-way valve
The operation principle of material injection device is the action by the oil cylinder that shoots material, and drives shoot material connecting rod and tup through the piston rod that shoots material and produces corresponding actions, by the action of stretching out of tup the metal feed liquid is pushed die cavity, thereby finishes the function of die cast product.Whole material shooting process must experience: slow shot state, fast shot state, " brake " injection state, pressure charging press-shoot state, wherein whether pressure charging press-shoot can select needs according to the arts demand of die cast product, and whether " brake " injection also can select needs according to the technological requirement of die cast product.Specifically describe the realization of each state of action that shoots material below:
The injection state directly provides dynamicliquid pressure oil by die casting machine hydraulic pump group at a slow speed, M1 charges into the oil cylinder rodless cavity that shoots material with pressure oil through the slow shot control module, meanwhile, direction valve V4, V5 are also simultaneously, inserted valve V1, V2 are in opening, the cylinder rod chamber that shoots material carries out oil extraction via inserted valve V1, V2, and the oil cylinder that the shoots material oil cylinder piston bar that will shoot material under the driving of rodless cavity pressure oil liquid is released at a slow speed, and this process is the slow shot state.
After the slow shot state makes tup stretch out a segment distance, through the control of position detecting switch and change the fast shot state over to, the fast shot state is oil-filled fast to the oil cylinder rodless cavity that shoots material through fast shot control module M2 by the accumulator that shoots material fast, simultaneously, the cylinder rod chamber fluid that shoots material is through inserted valve V1, the quick oil extraction of V2, the oil cylinder piston bar that shoots material also stretches out by stretching out at a slow speed to change into fast rapidly, and this process is the state that shoots material fast.
When promoting the metal feed liquid, tup charges into die cavity fast, when being about to be full of die cavity, the action that shoots material this moment also will finish, the piston rod that shoots material has been met travel switch LS1, the normally-closed contact of travel switch produces action and disconnects, if this moment, brake function selector switch SB1 was set at off-state (selection has brake) in advance, then the solenoid of direction valve V4 will be cut off power supply and make valve core reset, inserted valve V3 opens, the cylinder rod chamber fluid that shoots material charges into the spring cavity of inserted valve V1 fast through the PA passage of inserted valve V3 and direction valve V4, inserted valve V1 closes rapidly, shoot material the quick discharge of rod chamber fluid of oil cylinder by before binary channels oil extraction (through inserted valve V1, the V2 oil extraction) changes single channel oil extraction (through inserted valve V2 oil extraction) into, thereby generation throttle effect, the oil extraction ability reduces greatly, the speed that shoots material also reduces rapidly, and this process is " brake " injection state.Inserted valve V2 has adjusting rod, and openings of sizes that can regulating spool is used for the final speed after the control " brake ".Brake function selector switch SB1 is used for whether need selecting brake function, if do not need brake, then SB1 is in closure state, and the solenoid of direction valve V4 can keep energising by this passage, inserted valve V1 can not close before the end that shoots material all the time, therefore just can not produce " brake " action yet.
Pressure charging press-shoot can be selected needs and needs not according to the technological requirement of die cast product, supercharging if desired, then in shoot material fast back or " brake " material shooting process, pressurization control module M3 charges into the oil cylinder supercharging oil pocket that shoots material rapidly with the shoot material pressure oil of accumulator of supercharging, by the conversion of area ratio, at bigger pressure that shoots material of rodless cavity generation of the oil cylinder that shoots material.
For the needs of die cast product technology, injection speed is high more, and then the time of feed liquid loading mould cavity is short more, also just help the moulding of product more, if the filling time is long, then the metal feed liquid will temperature reduce bigger before end-of-fill, mobile variation causes die cast product defective.Brake function then just in time is to reduce injection speed, therefore, in " brake " process, the time that the speed that shoots material is changeed switching at a slow speed fast is short more good more, and the time is short more, can guarantee under the prerequisite of end front reduction gear that shoots material, the position that makes " brake " beginning is the closer to the ending segment that shoots material, the metal feed liquid loading mould cavity time delays that " brake " causes is just more little, and metal feed liquid loading mould cavity is fast more, and the use of inserted valve V3 is just in order to reach this purpose design.The process of closing at inserted valve V1 below, adopt plug-in mounting V3 and do not adopt inserted valve V3 (directly closing with direction valve V4 control inserted valve V1) to do a contrast in the theory calculating:
Suppose that above hydraulic valve all selects the product of BOSCH-REXROTH company for use, look into BOSCH-REXROTH company hydraulic valve data, then the parameter of relevant hydraulic valve is as follows:
The volume of 63 latus rectum inserted valve spring cavitys is 106cc
The volume of 25 latus rectum inserted valve spring cavitys is 7.21cc
The metered flow of 25 latus rectum inserted valves is 800L/min
The metered flow of 6 latus rectum direction valves is 50L/min
6 latus rectum direction valves are 10ms from being opened to the switching time of cutting out
When then adopting inserted valve V3 and direction valve V4 to control inserted valve V1 simultaneously to close, direction valve V4 outage, direction valve V4 control inserted valve V3 opens then, and direction valve V4 and inserted valve V3 control inserted valve V1 simultaneously and close then, and the whole pass used Time Calculation of closed procedure is as follows:
T=direction valve V4 shut-in time+inserted valve V3 opening time+inserted valve V1 shut-in time
T-10+7.21/[50x1000/(60x1000)]+106/[(800+50)x1000/(60x1000)]＝26.2ms
When directly adopting direction valve V4 control inserted valve V1 to close, direction valve V4 outage, direction valve V4 control inserted valve V1 closes then, and the whole pass used Time Calculation of closed procedure is as follows:
T=direction valve V4 shut-in time+inserted valve V1 shut-in time
T＝10+106/[50x1000/(60x1000)]＝137.2ms
The above theoretical effect that only supplies explanation inserted valve V3 of calculating, it closes faster than direct service orientation valve V4 control inserted valve V1.In fact, more than the actual used times of two kinds of control modes all short a lot of than the time that theory is calculated because all be that previous link also finishes in the whole process, a back link has just begun, if cut the time of lap, the then actual time spent, it is enough with regard to reducing.
Claims (5)
1. an injection ' braking ' device of die casting machine is made up of inserted valve V1, V2, V3 and direction valve V4, V5; It with shoot material oil cylinder G1, slow shot control module M1, fast shot control module M2, supercharging shoot material control module M3, shoot material accumulator A2 and the limit switch LS1 of accumulator A1, supercharging that shoot material formed the material injection device (seeing accompanying drawing 1) of die casting machine jointly fast.
2. according to claim 1 described " brake " device, link to each other with the rod chamber hydraulic fluid port of the oil cylinder that shoots material, the oil cylinder oil extraction that shoots material when being used to shoot material control in described " brake " device, has designed double oily passage (inserted valve V1 and inserted valve V2 oil extraction in parallel).
3. according in claim 1 described " brake " device, on guide's oil circuit of inserted valve V1, be provided with inserted valve V3 and direction valve V4, the inside nominal diameter of inserted valve V3 is less than the inside nominal diameter of inserted valve V1, and inside nominal diameter greater than direction valve V4, when direction valve V4 cuts off the power supply, the spring cavity of inserted valve V3 is by the BT channel connection oil return pipe of direction valve V4, inserted valve V3 opens, and the rod chamber fluid of the oil cylinder that shoots material is oil-filled to the spring cavity of inserted valve V1 rapidly by the PA passage of inserted valve V3 and direction valve V4, inserted valve V1 closes rapidly, the cylinder rod chamber fluid that then shoots material can only pass through inserted valve V2 throttling oil extraction, throttle effect will make the oil extraction flow reduce greatly, realize moment deceleration (i.e. " brake "), thereby avoided the huge impulsive force that shoots material because of the too high generation of speed.
4. according in claim 1 described " brake " device, inserted valve V2 has the adjusting rod of adjustable valve core openings of sizes, can adjust the oil filling capacity of valve as required, is used to control the final speed after the brake.
5. according in the claim 1 described injection device, when the bar that shoots material is met travel switch LS1, the normally-closed contact action of travel switch, the energising of the solenoid of cutting direction valve V4, this process need not be exported control again through the computing of controller, thereby has also saved the time (see accompanying drawing 2) of direction valve V4 from the "on" position to the off-position.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810198308A CN101664798A (en) | 2008-09-04 | 2008-09-04 | Injection 'braking' device of die casting machine |
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| CN200810198308A CN101664798A (en) | 2008-09-04 | 2008-09-04 | Injection 'braking' device of die casting machine |
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| CN101664798A true CN101664798A (en) | 2010-03-10 |
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| CN200810198308A Pending CN101664798A (en) | 2008-09-04 | 2008-09-04 | Injection 'braking' device of die casting machine |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588389A (en) * | 2012-03-08 | 2012-07-18 | 烟台鲁宝钢管有限责任公司 | Hydraulic power source shutoff device capable of guaranteeing site operation safety |
| CN104948512A (en) * | 2015-07-07 | 2015-09-30 | 佛山联升压铸科技有限公司 | Efficient pressure buildup device for die casting machine |
| CN105864138A (en) * | 2016-04-27 | 2016-08-17 | 中山市德工机械科技有限公司 | Rapid hammer returning device |
| CN112524101A (en) * | 2020-11-20 | 2021-03-19 | 深圳领威科技有限公司 | Auxiliary energy storage device |
| CN113953484A (en) * | 2021-09-15 | 2022-01-21 | 宁波保税区海天智胜金属成型设备有限公司 | Air compression injection protection control system and control method for die casting equipment |
| CN114042889A (en) * | 2021-11-26 | 2022-02-15 | 宁波力劲科技有限公司 | Die-casting machine pressure chamber molten metal pre-filling control method and system, storage medium and die-casting machine |
| CN114713794A (en) * | 2022-04-07 | 2022-07-08 | 宁波保税区海天智胜金属成型设备有限公司 | Self-adjusting control method for return hammer of die casting machine |
| CN115889731A (en) * | 2023-02-27 | 2023-04-04 | 宁波力劲科技有限公司 | Knockout control method and knockout system of large die casting machine |
-
2008
- 2008-09-04 CN CN200810198308A patent/CN101664798A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588389A (en) * | 2012-03-08 | 2012-07-18 | 烟台鲁宝钢管有限责任公司 | Hydraulic power source shutoff device capable of guaranteeing site operation safety |
| CN102588389B (en) * | 2012-03-08 | 2015-04-08 | 烟台鲁宝钢管有限责任公司 | Hydraulic power source shutoff device capable of guaranteeing site operation safety |
| CN104948512A (en) * | 2015-07-07 | 2015-09-30 | 佛山联升压铸科技有限公司 | Efficient pressure buildup device for die casting machine |
| CN105864138A (en) * | 2016-04-27 | 2016-08-17 | 中山市德工机械科技有限公司 | Rapid hammer returning device |
| CN112524101A (en) * | 2020-11-20 | 2021-03-19 | 深圳领威科技有限公司 | Auxiliary energy storage device |
| CN112524101B (en) * | 2020-11-20 | 2022-02-08 | 深圳领威科技有限公司 | Auxiliary energy storage device |
| CN113953484A (en) * | 2021-09-15 | 2022-01-21 | 宁波保税区海天智胜金属成型设备有限公司 | Air compression injection protection control system and control method for die casting equipment |
| CN114042889A (en) * | 2021-11-26 | 2022-02-15 | 宁波力劲科技有限公司 | Die-casting machine pressure chamber molten metal pre-filling control method and system, storage medium and die-casting machine |
| CN114042889B (en) * | 2021-11-26 | 2023-02-28 | 宁波力劲科技有限公司 | Die-casting machine pressure chamber molten metal pre-filling control method and system, storage medium and die-casting machine |
| CN114713794A (en) * | 2022-04-07 | 2022-07-08 | 宁波保税区海天智胜金属成型设备有限公司 | Self-adjusting control method for return hammer of die casting machine |
| CN114713794B (en) * | 2022-04-07 | 2024-05-07 | 宁波保税区海天智胜金属成型设备有限公司 | Self-adjusting control method for return hammer of die casting machine |
| CN115889731A (en) * | 2023-02-27 | 2023-04-04 | 宁波力劲科技有限公司 | Knockout control method and knockout system of large die casting machine |
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Application publication date: 20100310 |