CN2163017Y

CN2163017Y - Die casting machine oil pressure control unit

Info

Publication number: CN2163017Y
Application number: CN 93225335
Authority: CN
Inventors: 萧翠霞
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-03-16
Filing date: 1993-03-16
Publication date: 1994-04-27
Anticipated expiration: 2003-03-16

Abstract

The utility model provides a unit for controlling the oil pressure of the die casting machine, comprising an electromagnetic valve whose oil discharging and lifting are controlled by pumping; a power source unit for opening and closing the die composed of electromagnetic pressure regulating valves; an injection unit composed of a pressure accumulator, a pressure switch, a logical valve, a one-way inverted valve, an injection cylinder, a pressure increasing unit, etc. The injection unit is also provided with a pressure detector which controls the pressure in the relevant pipelines of the injection cylinder to automatically control the low speed, high speed, and pressure increasing actions of the injection cylinder, and to automatically monitor and automatically lighten the power consumption and the load abrasions of elements. The automatic self-control effect of machinery and the benefit of output value are further improved.

Description

Die casting machine oil pressure control unit

The utility model relates to the control device of forcing press.

Differentiation is gone up in the relevant hydraulic pressure control device design of general die casting machine two parts, an oil pressure control loop for control mould open and close, an oil pressure control loop for the start of control ejaculation cylinder.Known open and close mould oil pressure control loop, the artificial mode of setting of adjusting is adopted in the speed control of its open and close mould, there is no the function that segmentation speed is set in facility design itself, obviously, the artificial mode of adjusting is for fitting like a glove on whole the facility orthofunction benefit; Known open and close mould oil pressure control loop, all remain on the state of the start of boosting when actual start and during mold closing always, automatically monitoring environment comes the unnecessary load construction of appropriate releasing, not only waste power supply, and influenced the life-span of facility because of each component abrasion aggravation under the high capacity.In addition, the relevant cylinder speed controlling portion branch that penetrates of known die casting machine, at penetrating cylinder low speed, at a high speed, the setting start of supercharging, displacement touch switch or equivalence element are installed, utilize the distance that penetrates the cylinder propelling to detect the ejaculation cylinder low speed of controlling oil hydraulic system, at a high speed, the supercharging action, but, for striking volume difference, inject and penetrate liquid measure number difference, then must readjust and set the position of displacement detection switch everywhere, not only bothersome, time-consuming, and the precision that detects is also because of setting carelessness or inaccurately have influence on whole device so that the coordination of facility, thus make the product precision not good enough.

The purpose of this utility model, it is a kind of die casting machine hydraulic pressure control device of design, it provides the wearing and tearing that can monitor automatically, alleviate electrical source consumption and element load automatically, with energy savings, prolong facility service life, simultaneously, it also provides one can control the issuing velocity variation of penetrating cylinder automatically according to setting act pressure, improves the automatic automatic control usefulness of facility and produces benefit.

The technical solution of the utility model is as follows: the die casting machine hydraulic pressure control device includes open and close mould power source and ejecting device, wherein, this power source includes at least more than one pumping, on each pumping pipeline, respectively dispose a control draining, rise the magnetic valve of oil, and be used for setting pressure and eliminate the electromagnetic voltage adjusting valve of actuating impulse; This ejecting device includes the accumulator of a tool release of pressure and pressure accumulation function, one can set and adjust the pressure switch of this accumulator pressure, one can adjust control low speed, penetrate at a high speed start by low speed, the logical valve that the high speed logic valve is formed, one can be produced the unidirectional non-return valve of start by area difference, one group of supercharging device and one includes pressurized cylinder at interior ejaculation cylinder, and, low speed in this ejecting device, at a high speed and supercharging start system monitored by a pressure detector that can detect this ejaculation cylinder respective line internal pressure, and control this ejaculation cylinder according to the degree of agreement of the variation of relevant pipeline inner pressure value and the predefined force value of pressure detecting and make low speed, the action of high speed or supercharging.For improving the effectiveness of this die casting machine hydraulic pressure control device, above-mentioned power source includes a big capacity pumping, at least one low capacity pumping, and this large and small capacity pumping start or merging start separately, so that open and close mould speed can have multiple choices, in addition, in the above-mentioned power source each pumping boost and whether pressure release start or armed state can reach numerical value that pressure switch preestablishes by the accumulator pressure in the ejecting device and monitor automatically.

The utlity model has the advantage of following several respects: 1. have automatic measuring ability in view of power source, so that idle running pumping pressure release during armed state, so its energy consumption reduces and can reduce the wearing and tearing of facility; 2. in view of being provided with pressure detector, so ejecting device penetrates in low speed that to change the control of penetrating at a high speed stable, and its speed can freely be adjusted setting; 3. the automatic control usefulness of facility is higher, acceleration time of penetrating at a high speed of adjustable settings for example, pressure rising time that supercharging is penetrated and pressure size etc.; 4. accumulator can absorb and eliminate the reaction pulse that die cavity is produced when full automatically, and when portion's pressure reaches predetermined value within it, even power source transfers idling conditions automatically to.

Provide the embodiment of the utility model below in conjunction with accompanying drawing, and be described in further detail:

Fig. 1 is the utility model die casting machine hydraulic pressure control device allocation plan.

Fig. 2 is the utility model die casting machine hydraulic pressure control device ejecting device schematic diagram of partly arranging in pairs or groups.

With reference to Fig. 1, the utility model die casting machine hydraulic pressure control device, comprise open and close mould power source 1, and ejecting device 2 two parts, wherein, open and close mould power source 1 includes a big capacity pumping 11, one low capacity pumping 12, respectively being furnished with one in this two pumping 11,12 can control its draining or rise oily magnetic valve 111,121, an and electromagnetic voltage adjusting valve 13, in order to setting pressure and elimination actuating impulse, this electromagnetic voltage adjusting valve 13 and above-mentioned control pumping 11,12 drainings, system's action simultaneously when rising oily magnetic valve 111,121 starts.Above-mentioned opening, mold closing power source 1, system is used for controlling and opens, opening of the start oil hydraulic cylinder 14 of mold closing, toold closing speed (controllable speed is slow-fast-slow order stroke), make out, the speed of relevant stage casing during fast can have low in the toold closing speed, in, the setting start that the Senior Three kind is selected, wherein, when desiring to be regulated to low speed, power source 1 is only enabled low capacity pumping 12, so that open, the quick period of mold closing is in the low speed action, if the quick period of regulation and control is when being middling speed, power source 1 is only enabled big capacity pumping 11, if the quick period of regulation and control is when being high speed, then need only enable low capacity pumping 12 and big capacity pumping 11 simultaneously, very convenient, obviously, principle according to the different assembly of several pumpings, also can adopt other group modes of a plurality of pumpings, low to realize, in, the setting of high friction speed and selection, in addition, relevant opening, the speed of period at a slow speed after the quick period in the toold closing speed is stopped to set by deceleration buffer promptly fixed in the facility control device and controls; In addition, after fooled each actuator start of control stops, be in the big pumping 11 or the little pumping 12 of actuator state, perhaps large and small pumping 11,12, corresponding solenoid valve 111 in its pipeline, or magnetic valve 121, or magnetic valve 111 promptly automatically is pipeline draining state with magnetic valve 121, make power set become the idle running armed state, with the wearing and tearing of effective energy savings and minimizing pumping.

The ejecting device 2 of die casting machine hydraulic pressure control device, include a logical valve 21, one can be produced the non-return valve 22 of start by area difference, one group of supercharging device 23, one includes the ejaculation cylinder 25 of pressurized cylinder 24, the accumulator 26 of one tool release of pressure and pressure accumulation and a pressure switch 27, wherein logical valve 21 is relatively linked by internal axis and can adjust that control is low to be penetrated the LSL valve 21A of start at a high speed and form with high speed logic valve 21B; This accumulator 26 can provide stable pressure store when start, and the loss of supplementary pressure at any time, to keep pressure accumulation in a steady state value, 27 of this pressure switches are used for setting the force value that accumulator 26 stores, the setting system of these accumulator 26 automatic fillings can be more than the 15Kg with the engine pressure pressure differential resetting in the power set 1, use and shorten the 26 automatic prolongations of accumulator, reach the purpose of filling rapidly; In addition, on the control action of whole ejecting device 1, system is by connecting logical valve 21 places low to control, high-speed start with pipeline between accumulator 26 and acting device, and the start of logical valve 21, monitored the pressure that penetrates in the cylinder 25 relevant pipelines by pressure detector 28 and changed numerical value, and then come the low speed of control logic valve 21 to turn at a high speed.

With reference to Fig. 2, the integral body of ejecting device 2 is matched start relation and structure, lie in high temperature aluminium alloys solution after the notes soup mouth 31 of sleeve 3 injects sleeve 3, LSL valve 21A start, accumulator 26 releases of pressure, set the oil pressure of flow in advance through LSL valve 21A, make and penetrate cylinder 25 and do at a slow speed and penetrate, the aluminium alloy solution that order is annotated in sleeve 3 in is moved by tup 4 extruding and past mould 5 directions; When solution will enter die cavity 50 in the sleeve 3, must be by the minimum cast gate 51 in cross section, tup 4 resistances in the propelling increase, relative ejaculation cylinder 25 pressure raise because of resistance increases, when the pressure that is risen reaches preset detection pressure, detect startup high speed logic valve 21B start by pressure detector 28,, ejaculation cylinder 25 is done at a high speed penetrated to supply with the oil pressure of bigger flow; In addition, when being full state because of penetrating and be packed into die cavity 50 at a high speed, because of the full pressure that increases suddenly reacts on pressure detector 28 once more, and the pulse that ejaculation cylinder 25 reaction forces are produced also directly impels unidirectional non-return valve 22 to close, pulse is absorbed by accumulator 26, simultaneously when detecting by the force value that configures in advance, supercharging logical valve 231 is started, make the pressure of accumulator 26 mend by supercharging ejaculation cylinder 24, and the moment supercharging makes the casting matter compacting in the die cavity 50, and relevant these supercharging device 23 contained pressurization time and force value systems can adjust setting in advance, and pressure portion then can be adjusted valve 232 through a supercharging and be set.

Claims

1, a kind of die casting machine hydraulic pressure control device is one can set and adjust it and penetrate cylinder low speed, high speed and supercharging and penetrate the control device of controlling, and this control device includes open and close mould power source (1) and ejecting device (2), it is characterized in that:

This power source (1) includes at least more than one pumping, respectively disposes a control draining on each pumping pipeline, rises oily magnetic valve and electromagnetic voltage adjusting valve (13);

This ejecting device (2) includes the accumulator (26) of a supply pressure, one can set and adjusts this accumulator (26) pressure accumulation and release of pressure in the pressure switch (27) of a setup pressure value, one can control low speed, penetrate the logical valve (21) of start at a high speed, one can be produced the unidirectional non-return valve (22) of start by area difference, one group of supercharging device (23) and one contains the ejaculation cylinder (25) of pressurized cylinder (24), and can preestablish force value changes and control ejaculation cylinder (25) issuing velocity with the relevant pipeline inner pressure of detection ejaculation cylinder (25) pressure detector (28) in penetrating cylinder (25) about pipeline is provided with at least one.

2, die casting machine hydraulic pressure control device according to claim 1, it is characterized in that, in this power source (1) contained pumping system via pipeline connect to control its boost and this ejecting device (2) of pressure release in the pressure switch (27) of adjustment accumulator (26) pressure accumulation.

3, die casting machine hydraulic pressure control device according to claim 1 is characterized in that, this power source (1) includes at least one low capacity pumping (12), a big capacity pumping (11).

4, die casting machine hydraulic pressure control device according to claim 1, it is characterized in that control logical valve (21) low, that penetrate start at a high speed is to comprise by internal axis to connect relatively and can adjust low LSL valve (21A) and the high speed logic valve (21B) that penetrates start at a high speed of control in this ejecting device (2).

5, die casting machine hydraulic pressure control device according to claim 1, it is characterized in that the contained non-return valve (22) that produces start by area difference is one can reach the full pressure that produces in mould inner mould chamber and reaction pulse and close automatically and impel the valve body of pulse by accumulator (26) absorption in penetrating at a high speed in this ejecting device (2).

6, die casting machine hydraulic pressure control device according to claim 1, it is characterized in that the supercharging device (23) in this ejecting device (2) is to include a pressurized cylinder (24) and that is positioned at ejaculation cylinder (25) to control the adjustment valve of pressurized cylinder (24) pressure and a control pressurized cylinder (24) opened and closed and be matched with the detection of pressure detector (28) setting supercharging start numerical value with accumulator (26) pipeline supercharging logical valve (231).