CN105057633A - Quantitive molten metal vacuum scooping device - Google Patents

Abstract

The invention discloses a quantitive molten metal vacuum scooping device which comprises a moving mechanism, a vacuum quantitive ladling device and a control device. The vacuum quantitive ladling device is arranged on the moving mechanism and is driven to move in a three-dimensional mode. The control device is connected with the moving mechanism and the vacuum quantitive ladling device. The vacuum quantitive ladling device comprises a vacuum generation device, a vacuum breakdown device, a pressure sensor and a pot component. The vacuum generation device is connected with the pot component so as to extract gas in the pot component to increase the height of molten metal in a pot. The pressure sensor is connected with the pot component so as to monitor the pressure of the gas in the pot to ensure the mass of the molten metal in the pot component. The vacuum breakdown device is connected with the pot component so as to control connection and disconnection between the gas in the pot and external gas to control whether the molten metal is released or not. The quantitive molten metal vacuum scooping device has the advantages that precision is high, scooped molten metal is slightly oxidized, purity is high, and maintenance is convenient.

Description

A kind of quantitatively molten metal vacuum pumping device

Technical field

The present invention relates to casting technology field, particularly relate to a kind of quantitatively molten metal vacuum pumping device.

Background technology

At present, in various Die Casting Industry, the mode generally using soup ladle to ladle is carried out to soup, and this soup mode of getting also exists molten metal easily oxidized, top layer low-quality soup is easily scooped to, low, the first setting of soup accuracy of measurement gets the shortcomings such as soup amount is complicated.In order to overcome existing defect of getting soup mode, Chinese patent CN103153501A discloses the patent of invention for the apparatus and method and casting machine of measuring melt, measuring container drops in smelting furnace, and the melt of measuring container is opened-is closed device and driven open position, until predetermined time end cycle or by weight sensor detect in measuring container arrive predetermined filling melt amount time, melt stops absorbing measuring container from smelting furnace, and wherein the melt of measuring container is opened-closed device and driven blocking position.

But also there is following defect in above-mentioned existing patent:

1) this weight sensor cannot monitor the airtight situation in inside of jug used for heating up water by the method for buoyancy survey liquid level, judges whether vacuum system leaks gas.

2) when getting soup amount and being larger, the liquid level of measuring container inner metal liquid is higher, and it is larger that weight sensor is subject to heat radiation, but the environment for use temperature of general weight sensor is-35 DEG C ~ 70 DEG C, very easily exceed serviceability temperature scope, weight sensor error in dipping is increased.

3) in general, it is more accurate that weight sensor uses in 20% ~ 80% scope of range, this makes selecting weight sensor range can not be too large, according to structure and the molten metal weight drawn, the range generally selected is 50kg ~ 250kg otherwise trueness error just increases, and cost also increases.According to the performance of each weight sensor on market, weight sensor safe overload scope is 150%FS, i.e. 1.5 times of full scale; Extreme overload scope is 300%FS, i.e. 3 times of full scale.If in use, jug used for heating up water parts are keeped in repair, such as remove the aluminium slag of jug used for heating up water entrance, the operations such as fastening are carried out to the screw of jug used for heating up water superstructure loosening, due to the amplification of the arm of force, the very easily ultimate load of overweight sensor, cause weight sensor to damage, jug used for heating up water parts and weight sensor must be departed from and just can keep in repair, or design antioverloading structure.And if not operating weight sensor, then the rigidity of device, intensity then can significantly increase.

Summary of the invention

Technical problem to be solved by this invention is, provide a kind of quantitatively molten metal vacuum pumping device, have precision high, institute's molten metal of getting oxidation is few, high purity and advantage easy to maintenance.

In order to solve the problems of the technologies described above, a kind of quantitatively molten metal vacuum pumping device of the present invention, comprise displacement mechanism, vacuum quantitative gets soup device and control device, institute's displacement mechanism is equiped with vacuum quantitative to get soup device and make three-D displacement to drive vacuum quantitative to get soup device, described control device is got soup device with displacement mechanism, vacuum quantitative respectively and is connected;

Described vacuum quantitative is got soup device and is comprised vacuum generating device, vacuum breakdown device of vacuum, pressure sensor and jug used for heating up water assembly, and described vacuum generating device is connected with jug used for heating up water assembly makes tank inner metal liquid height rise with the gas extracted in jug used for heating up water assembly; Described pressure sensor is connected with the pressure of monitoring gas in tank with jug used for heating up water assembly to determine the quality of jug used for heating up water assembly inner metal liquid; Whether described vacuum breakdown device of vacuum is connected with jug used for heating up water assembly and discharges to control molten metal with the break-make controlling gas and extraneous gas in tank.

As the improvement of such scheme, described control device comprises gets soup position control unit, records force value for obtaining pressure sensor, passes through and preset pressure value P ₁com-parison and analysis, thus calculate and judge whether to arrive and get soup position, and send control signal to displacement mechanism.

As the improvement of such scheme, described control device also comprises gets soup control unit, records force value for obtaining pressure sensor, through the pressure value P corresponding with aimed quality or aimed quality ₂com-parison and analysis, thus judge whether get soup to amount, and send control signal to vacuum generating device and jug used for heating up water assembly.

As the improvement of such scheme, described vacuum generating device comprises vacuum generator, magnetic valve A, flowmeter, control valve, and described magnetic valve A, vacuum generator, control valve are connected successively with flowmeter.

As the improvement of such scheme, described control valve is the one in Multi-level throttle valve, single-stage choke valve or proportioning valve.

As the improvement of such scheme, described vacuum breakdown device of vacuum comprises the magnetic valve B be communicated with extraneous air and the one-way throttle valve controlling gas flow, and described vacuum breakdown device of vacuum access is on vacuum generating device and jug used for heating up water assembly connecting pipe.

As the improvement of such scheme, described jug used for heating up water assembly comprises jug used for heating up water, spool and cylinder, and described spool is located in jug used for heating up water, and cylinder is connected with spool makes spool move axially in jug used for heating up water; Described jug used for heating up water lower end is provided with gets soup mouth, described spool be displaced downwardly to when getting soup mouth with get soup mouth and coordinate and be socketed.

As the improvement of such scheme, institute's displacement mechanism is XY axis robot.

As the improvement of such scheme, described XY axis robot comprises column weldment, beam part and straight line module, and described beam part is laterally located on column weldment, and beam part is provided with guide rail, slide block and transverse moving support;

Described straight line module is by fixed lateral traversing carriage being connected with beam part and sliding on beam part, and described vacuum quantitative is got soup device and is arranged on straight line module and can vertically moves.

Implement the present invention, there is following beneficial effect:

Quantitative molten metal vacuum pumping device of the present invention is according to the functional relation of quality m and pressure P, only need rest on when getting soup and get soup point, atmospheric pressure is less than again by pressure in jug used for heating up water, making molten metal increase enters in jug used for heating up water, pressure sensor record the force value P value corresponding with aimed quality identical maybe by record that jug used for heating up water current pressure values is converted into current draw quality of molten metal reach aimed quality time, then can realize accurately getting soup.Because pressure sensor is without the need to the liquid level close to smelting furnace, therefore the temperature of its environment for use is relatively steady, and not easily exceed serviceability temperature scope, error is little, and precision is high, avoids prior art sensor to exceed serviceability temperature scope and the problem that causes error in dipping large.

In addition, utilize vacuum to draw in jug used for heating up water by molten metal, arrive hello liquid point and discharge, can reduce the contact of molten metal and outside air, molten metal is not easily oxidized, and reduce the generation of oxide, impurity is few, and purity is high.

Finally, device of the present invention does not install weight sensor, and device good rigidly intensity is high.

Accompanying drawing explanation

Fig. 1 is the structural representation of a kind of quantitative molten metal vacuum pumping device of the present invention;

Fig. 2 is the schematic diagram of gas circuit of a kind of quantitative molten metal vacuum pumping device of the present invention;

Fig. 3 is the structural representation of jug used for heating up water assembly of the present invention;

Fig. 4 is the structural representation of jug used for heating up water of the present invention;

Fig. 5 is the structural representation of XY axis robot of the present invention.

Detailed description of the invention

For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail.

The existing mode generally using soup ladle to ladle is carried out to soup, and this soup mode of getting also exists molten metal easily oxidized, top layer low-quality soup is easily scooped to, low, the first setting of soup accuracy of measurement gets the shortcomings such as soup quality is complicated.And existingly patent discloses a kind of apparatus and method of measuring melt, adopt the loading of melt in weight sensor detection measuring container, easily exceed and exceed serviceability temperature scope, LOAD CELLS error in dipping is increased, and when jug used for heating up water parts are keeped in repair, due to the amplification of the arm of force, very easily exceed the ultimate load of LOAD CELLS, cause LOAD CELLS to damage.

For this reason, what the present invention changed existing method and device gets soup design and structural design, adopts and vacuumizes jug used for heating up water, and make air pressure in jug used for heating up water lower than external atmosphere pressure, pressed in jug used for heating up water by molten metal under atmospheric pressure effect, the molten metal height in jug used for heating up water rises.And according to m=ρ × V, just can determine the quality of jug used for heating up water inner metal liquid, the internal pressure P=ρ gh of jug used for heating up water simultaneously.Known, get the pressure of soup quality and jug used for heating up water inside, jug used for heating up water size existence function relation.Because jug used for heating up water is rule container, therefore also existence function relation between height h and volume V, by the functional relation that can obtain quality m and pressure P of deriving, thus when setting target gets soup amount, can be converted into pressure in corresponding tank, and pressure can detect according to pressure sensor in tank, so when pressure sensor readings reaches the pressure of corresponding mass, what can be drawn into setting gets soup quality.

As depicted in figs. 1 and 2, quantitative molten metal vacuum pumping device of the present invention comprises displacement mechanism, vacuum quantitative gets soup device 200 and control device, institute's displacement mechanism is equiped with vacuum quantitative to get soup device 200 and make three-D displacement to drive vacuum quantitative to get soup device 200, described control device is got soup device 200 with displacement mechanism, vacuum quantitative respectively and is connected;

Described vacuum quantitative is got soup device 200 and is comprised vacuum generating device 4, vacuum breakdown device of vacuum 5, pressure sensor 6 and jug used for heating up water assembly 7, and described vacuum generating device 4 is connected the gas extracted in jug used for heating up water assembly 7 with jug used for heating up water assembly 7 makes tank inner metal liquid height rise; Described pressure sensor 6 and jug used for heating up water assembly 7 are connected to monitor the pressure of gas in tank to determine the quality of jug used for heating up water assembly 7 inner metal liquid; Whether described vacuum breakdown device of vacuum 5 is connected to control gas and extraneous gas in tank break-make with jug used for heating up water assembly 7 discharges to control molten metal.

Particularly, Fig. 3 is the structural representation of jug used for heating up water assembly 7 of the present invention.

Jug used for heating up water assembly 7 is mainly used in splendid attire molten metal, and as Fig. 3, jug used for heating up water assembly 7 comprises jug used for heating up water 71, spool 72 and cylinder 73, and described spool 72 is located in jug used for heating up water 71, and cylinder 73 to be connected with spool 72 by connecting rod makes spool 72 move axially in jug used for heating up water 71; Described jug used for heating up water 71 lower end is provided with gets soup mouth 711, described spool 72 be displaced downwardly to when getting soup mouth 711 with get soup mouth 711 and coordinate and be socketed.

When need to open jug used for heating up water assembly 7 get soup mouth 711 time, belt movable valve plug 72 moves cylinder 73, thus makes spool 72 and get soup mouth 711 and removes and be socketed, get soup mouth 711 unlimited, molten metal 8 can free in and out jug used for heating up water 71; When need to close jug used for heating up water assembly 7 get soup mouth 711 time, cylinder 73 promotes spool 72 to be made spool 72 and gets soup mouth 711 and coordinate and be socketed, closed jug used for heating up water 71.

It should be noted that, jug used for heating up water 71 of the present invention is made up of inverted round stage and cylinder, and molten metal enters the volume computing of volume by jug used for heating up water 71 of jug used for heating up water 71.As shown in Figure 4, according to jug used for heating up water 71 structural representation, known R, r, h ₁, α is constant.

When molten metal height h is less than inverted round stage height h ₁time, because the large radius surface R of round platform changes with the change of h, therefore according to inverted round stage and cylinder angle α, obtain R=htana, the volume of molten metal is:

$V=\frac{\mathrm{\π}h}{3}\[{\left(htan\mathrm{\α}\right)}^2+\left(htan\mathrm{\α}\right)r+r^2\]-\mathrm{\π}\×r^2\×h......\left(1\right);$

It should be noted that calculate molten metal volume time need deduct spool 72 volume π × r ²× h.

When molten metal height h is greater than back taper height h ₁time, the volume of molten metal is:

$\begin{array}{c}V=\mathrm{\π}\×R^2\×\left(h-h_1\right)+\frac{{\mathrm{\πh}}_1}{3}(R^2+Rr+r^2)-\mathrm{\π}\×r^2\×h\\ =\mathrm{\π}\×(R^2-r^2)\×h+\frac{{\mathrm{\πh}}_1}{3}(r^2+Rr-2R^2);\end{array}\mathrm{......}\left(2\right);$

And according to m=ρ × V, the weight of jug used for heating up water 71 inner metal liquid 8 just can be determined.Due to the internal pressure P=ρ gh of jug used for heating up water 71.Known, get the pressure of soup quality and jug used for heating up water 71 inside, jug used for heating up water 71 size exists following functional relation.

When target gets quality when soup quality m is less than or equal to metal immersion full inverted round stage $m_1=\mathrm{\ρ}\×\frac{\mathrm{\π}}{3}\×(R^2+Rr-2r^2)\×h_1-{\mathrm{\πr}}^2{h}_1$ Time, then the functional relation of m and p is:

(1) formula is substituted into m=ρ × V,

$\begin{array}{c}m=\mathrm{\ρ}\×V=\mathrm{\ρ}\×\{\frac{\mathrm{\π}h}{3}\[{\left(htan\mathrm{\α}\right)}^2+\left(h\tan \mathrm{\α}\right)r+r^2\]-{\mathrm{\πr}}^{2}h\}=\mathrm{\ρ}\×\frac{\mathrm{\π}}{3}\×\[{\left(h\tan \mathrm{\α}\right)}^2+\left(h\tan \mathrm{\α}\right)r-2r^2\]\×h\·\·\·\·\·\·\left(3\right)\end{array}$

Again $P=\mathrm{\ρ}gh\⇒\mathrm{\ρ}h=\frac{p}{g},$

(3) formula of substitution obtains h obtains by m=ρ × V, thus tries to achieve corresponding p value.

When target gets quality when soup quality m is greater than metal immersion full inverted round stage $m_1=\mathrm{\ρ}\×\frac{\mathrm{\π}}{3}\×(R^2+Rr-2r^2)\×h_1-{\mathrm{\πr}}^2{h}_1$ Time, then the functional relation of m and p is:

(2) formula is substituted into m=ρ × V,

$m=\mathrm{\ρ}\×V=\mathrm{\ρ}\×\[\mathrm{\π}\×\left(R^2-r^2\right)\×h+\frac{{\mathrm{\πh}}_1}{3}(r^2+Rr-2R^2)\]......\left(4\right)$

Again $P=\mathrm{\ρ}gh\⇒\mathrm{\ρ}h=\frac{p}{g},$

(4) formula of substitution obtains i.e. m=a ₂p+c, a ₂, c is constant.

By the functional relation of above-mentioned quality m and pressure P, corresponding jug used for heating up water pressure P can be calculated according to aimed quality m ₂, thus when getting soup, as long as recording jug used for heating up water current pressure is aimed quality corresponding pressure value P ₂time maybe by record that jug used for heating up water current pressure values is converted into current draw quality of molten metal reach aimed quality time, can judge to get soup to amount.Need stop vacuumizing to during amount when getting soup, and instantaneously promote spool 72 by cylinder 73 and close jug used for heating up water.

In addition, as shown in Figure 2, described vacuum generating device 4 and air pump provide power by same source of the gas, and source of the gas three linked piece 10 is provided with on total appendix, this source of the gas three linked piece 10 comprises air reducing valve, filter, oil sprayer three-major-items, pressure-reducing valve can carry out voltage stabilizing to source of the gas, makes source of the gas be in steady state, can reduce because of the damage to the hardware such as valve or actuator during source of the gas pressure fluctuations.It is clean that filter is used for source of the gas, can moisture content in filtering compressed air, avoids moisture content with gas access to plant.Oil sprayer can lubricate body movement parts, can lubricate, greatly extend the service life of body to the parts of inconvenient apply oil.

A wherein branch of source of the gas is communicated to cylinder 73, and is released by magnetic valve C11 control cylinder 73 piston and retract, thus closing and opening of soup mouth 711 got by realization control jug used for heating up water 71.

Another branch of source of the gas is communicated in jug used for heating up water 71 by vacuum generating device 4 always.Described vacuum generating device 4 comprises vacuum generator 42, magnetic valve A41, flowmeter 44, control valve 43, by gas from source of the gas to the flow direction of jug used for heating up water assembly 7 successively connected electromagnetic valve A41, vacuum generator 42, control valve 43 and flowmeter 44.Open magnetic valve A41 when needs start vacuum generating device 4, make vacuum generator 42 obtain source of the gas power, vacuumize in jug used for heating up water 71.And the gas flow of the flowmeter 44 be located in this branch when vacuumizing for checking in pipeline.

In order to control the speed that vacuum generator 42 pairs of jugs used for heating up water 71 vacuumize, the present invention adopts control valve 43 accurately to control current jug used for heating up water 71 pressure, specifically comprises following several embodiment:

A kind of embodiment is use descending Multi-level throttle valve to realize Multistage Control vacuum drawing liquid.

Set multiple switching point based on pressure feedback, first vacuumize with large flow, the flow being switched to little one-level after switching pressure vacuumizes, and is switched to the flow of less one-level after next switching pressure again, control drawing liquid speed with this, be implemented to setting pressure P ₂time molten metal liquid level slowly rise, be convenient to get soup Weight control.

Another kind of embodiment is with single-stage throttle valve control vacuum generator 42 flow.

Test before start, measure corresponding maintenance total amount choke valve opening, with corresponding single-stage throttle valve control during production, be implemented to setting pressure P ₂time molten metal liquid level slowly rise, be convenient to get soup Weight control.

Also has a kind of embodiment for coordinating pressure sensor 6 to control vacuum with the proportioning valve vacuum generator 42 that dams.

According to the above-mentioned m-p functional relation derived, calculate the pressure P that aimed quality is corresponding ₂, use PID reduced pressure sensor 6 value of feedback, control ratio valve dams vacuum generator 42, realizes the control vacuumized, as value of feedback and goal pressure P ₂time identical, close spool 72 at once.

And the vacuum breakdown device of vacuum 5 for boosting comprises the magnetic valve B51 be communicated with extraneous air and the one-way throttle valve 52 controlling gas flow, described vacuum breakdown device of vacuum 5 accesses on vacuum generating device 4 with jug used for heating up water assembly 7 connecting pipe.Carry out in the process of release opening magnetic valve B51, the jug used for heating up water 71 top vacuum that molten metal is housed is destroyed, and molten metal under gravity, flows out downwards from getting soup mouth 711, thus realizes release molten metal to what specify and feed liquid point.And one-way throttle valve 52 reaches by the adjustment gas speed flowed in jug used for heating up water 71 object controlling molten metal rate of release.

Preferably, according to the functional relation of quality m and pressure P, control device of the present invention comprises gets soup position control unit, records force value for obtaining pressure sensor 6, through and preset pressure value P ₁com-parison and analysis, thus calculate and judge whether to arrive and get soup position, and send control signal to displacement mechanism.

Owing to getting in the process of soup-hello liquid in circulation, if when the aimed quality that will draw is larger, the liquid level position of smelting furnace inner metal liquid has fluctuation, and therefore, when jug used for heating up water continues decline and start to immerse molten metal, the degree of depth that jug used for heating up water declines may be different.And vacuum quantitative to be got soup device 200 by displacement mechanism and is moved to after above metal smelter and start high speed test by control device of the present invention, when the test of vacuum quantitative soup device 200 makes jug used for heating up water assembly 7 start to immerse in molten metal, because the pressure ratio external atmosphere pressure of jug used for heating up water inside is little, negative pressure state is in jug used for heating up water, for reaching the air pressure balance inside and outside jug used for heating up water, molten metal outside jug used for heating up water is pressed in tank, and the molten metal in jug used for heating up water raises thus.Control device get soup position control unit by being connected with pressure sensor 6, pressure sensor 6 can be obtained and record current pressure values in jug used for heating up water, and by current pressure values and preset pressure value P ₁com-parison and analysis.When current pressure values arrives preset pressure value P ₁time, now get soup position control unit and judge that vacuum quantitative is got soup device 200 and arrived noodle soup position, can calculate according to time, displacement or pressure and get soup position, and send control signal to displacement mechanism and make vacuum quantitative get soup device 200 to stop test, thus determine the final stop place of jug used for heating up water.

The computational methods of specifically getting soup position are as follows:

(1) time judges

The speed that vacuum quantitative gets the decline of soup device is controlled, can when at the uniform velocity or speed change test, set vacuum quantitative and get a certain degree of depth of soup device immersion molten metal as getting soup position, then noodle soup position is a definite value to the distance of getting soup position, by the measuring and calculating test time, judge whether that soup position is got in arrival according to test speed.

(2) displacement judges

The displacement that vacuum quantitative gets soup device distance initial position can be read in real time by the encoder be installed on test unit 31, when vacuum quantitative soup device arrives noodle soup position, encoder record displacement data at that time, vacuum quantitative is got soup device and is continued test, if when the displacement data that the displacement data of current acquisition obtains when deducting noodle soup position equals preset value, then can judge that soup position is got in arrival.

(3) pressure judges

Setup pressure value P time in advance by calculating arrival and getting soup position ₃, when vacuum quantitative soup device continuous decrease, it is setup pressure value P that pressure sensor records current pressure values ₃time, then can judge that soup position is got in arrival.Or by above-mentioned two kinds of determination methods make vacuum quantitative get soup device arrive get soup position, record get soup position force value at that time, after this can directly be undertaken judging whether that soup position is got in arrival by this force value.

Jug used for heating up water 71 rests on to be got Tang Weike and guarantees that vacuum quantitative is got soup device 200 and got soup smoothly, without the need to such as prior art test always to suitable liquid level, and cause the environment for use temperature of whole device to improve, the embodiment of the present invention makes liquid level rise by the mode vacuumized, sensor in avoiding device is in the condition of high temperature and measures, and effectively improves the accuracy measured.

Preferably, described control device also comprises gets soup control unit, records force value for obtaining pressure sensor 6, through the pressure value P corresponding with aimed quality or aimed quality ₂com-parison and analysis, thus judge whether get soup to amount, and send control signal to vacuum generating device 4 and jug used for heating up water assembly 7.

When judging whether to get soup to amount, undertaken by two kinds of embodiments:

A) according to the functional relation of m-p, the pressure P corresponding to aimed quality m must be calculated before getting soup ₂.When carrying out getting soup, supervising device get soup control unit by being connected with pressure sensor 6, pressure sensor 6 can be obtained and record current pressure values in jug used for heating up water, and by current pressure values and the pressure value P calculated ₂com-parison and analysis.When the current pressure values recording jug used for heating up water reaches pressure P ₂time, then can judge to get soup to amount.

When b) carrying out getting soup, the soup control unit of getting of supervising device obtains pressure sensor 6 and records current pressure values in jug used for heating up water, the current pressure values recording jug used for heating up water is converted into according to the functional relation of m-p and currently draws quality of molten metal, quality of molten metal is drawn and aimed quality contrasts again by current, when current draw quality of molten metal reach aimed quality time, then can judge to get soup to amount.

Preferably, the present invention adopts XY axis robot 100 as displacement mechanism, as shown in Figure 5, described XY axis robot 100 comprises column weldment 1, beam part 2 and straight line module 3, described beam part 2 is laterally located on column weldment 1, and beam part 2 is provided with guide rail 21, slide block and transverse moving support 22; The slide block of described beam part 2 is movably arranged on guide rail 21, and transverse moving support 22 is fixed on slide block, and transverse moving support 22 thus slidably;

Described straight line module 3 transverse moving support 22 is connected with beam part 2 by being fixed on and sliding on beam part 2, and described vacuum quantitative is got soup device 200 and is arranged on straight line module 3 and can vertically moves.

A concrete implementation step of carrying out quantitative soup of quantitative molten metal vacuum pumping device of the present invention is adopted to be:

(1) control device makes vacuum quantitative get soup device 200 by XY axis robot 100 to be positioned at above metal smelter, and that opens jug used for heating up water assembly 7 gets soup mouth 711, and makes vacuum quantitative get soup device 200 test.

(2) control device detects that vacuum quantitative changes low speed test into when getting soup device 200 arrival rate toggle bit, and starts vacuum generating device 4 to extract the gas of jug used for heating up water assembly 7.

(3) vacuum quantitative gets soup device 200 when continuing test and immerse molten metal certain depth, and the soup position control unit of getting of control device obtains pressure sensor 6 and records jug used for heating up water current pressure values, when current pressure values reaches the pressure P preset ₁in time, judges to arrive and then judges to arrive noodle soup position, and goes out to get soup position according to noodle soup position calculation, and control device controls vacuum quantitative and gets soup device 200 getting soup position and stop test.

(4) continue to vacuumize and make molten metal height increase, the soup control unit of getting of control device obtains pressure sensor 6 and records jug used for heating up water current pressure values, when pressure sensor 6 reading reaches the pressure P of corresponding mass ₂, then judge to get soup to amount, now stop vacuumizing and instantaneous closed jug used for heating up water assembly 7.

(5) XY axis robot 100 rises vacuum quantitative and gets soup device 200, completes and gets soup.

(6) vacuum quantitative that molten metal is housed is got soup device 200 by control XY axis robot 100 and is delivered to hello liquid point by control device, vacuum breakdown device of vacuum 5 is opened after opening jug used for heating up water assembly 7, gas in tank is communicated with extraneous gas, thus release molten metal is in the pressure chamber of die casting machine, completes and feeds liquid.

Quantitative molten metal vacuum pumping device of the present invention utilizes vacuum to draw in jug used for heating up water by molten metal, and arrive hello liquid point and discharge, can reduce the contact of molten metal and outside air, molten metal is not easily oxidized, and reduce the generation of oxide, impurity is few, and purity is high.

Prior art measuring container is comprised the weight sensor be located on measuring container to drop to smelting furnace together, if aimed quality is larger, then weight sensor is the closer to molten metal liquid level, is subject to that heat radiation is larger very easily exceedes serviceability temperature scope, and weight sensor error in dipping is increased.And device of the present invention only need rest on when getting soup and gets soup point, then be less than atmospheric pressure by pressure in jug used for heating up water, make molten metal increase and enter in jug used for heating up water.Pressure sensor is without the need to the liquid level close to smelting furnace, and therefore the temperature of its environment for use is relatively steady, and not easily exceed serviceability temperature scope, error is little, and precision is high.

In addition, existing ultimate load of getting soup device very easily overweight sensor when keeping in repair, causes weight sensor to damage, jug used for heating up water assembly and weight sensor must be departed from and just can keep in repair, or designs antioverloading structure.And device of the present invention is without the need to removing parts, easy to maintenance.

Finally to should be noted that; above embodiment is only in order to illustrate technical scheme of the present invention but not limiting the scope of the invention; although be explained in detail the present invention with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to technical scheme of the present invention or equivalent replacement, and not depart from essence and the scope of technical solution of the present invention.

Claims (9)

1. a quantitative molten metal vacuum pumping device, it is characterized in that, comprise displacement mechanism, vacuum quantitative gets soup device and control device, institute's displacement mechanism is equiped with vacuum quantitative to get soup device and make three-D displacement to drive vacuum quantitative to get soup device, described control device is got soup device with displacement mechanism, vacuum quantitative respectively and is connected;

Described vacuum quantitative is got soup device and is comprised vacuum generating device, vacuum breakdown device of vacuum, pressure sensor and jug used for heating up water assembly, and described vacuum generating device is connected with jug used for heating up water assembly makes tank inner metal liquid height rise with the gas extracted in jug used for heating up water assembly; Described pressure sensor is connected with the pressure of monitoring gas in tank with jug used for heating up water assembly to determine the quality of jug used for heating up water assembly inner metal liquid; Whether described vacuum breakdown device of vacuum is connected with jug used for heating up water assembly and discharges to control molten metal with the break-make controlling gas and extraneous gas in tank.

2. quantitative molten metal vacuum pumping device as claimed in claim 1, it is characterized in that, described control device comprises gets soup position control unit, records force value for obtaining pressure sensor, through and preset pressure value P ₁com-parison and analysis, thus calculate and judge whether to arrive and get soup position, and send control signal to displacement mechanism.

3. quantitative molten metal vacuum pumping device as claimed in claim 1, it is characterized in that, described control device also comprises gets soup control unit, records force value for obtaining pressure sensor, through the pressure value P corresponding with aimed quality or aimed quality ₂com-parison and analysis, thus judge whether get soup to amount, and send control signal to vacuum generating device and jug used for heating up water assembly.

4. quantitative molten metal vacuum pumping device as claimed in claim 1, it is characterized in that, described vacuum generating device comprises vacuum generator, magnetic valve A, flowmeter, control valve, and described magnetic valve A, vacuum generator, control valve are connected successively with flowmeter.

5. quantitative molten metal vacuum pumping device as claimed in claim 4, it is characterized in that, described control valve is the one in Multi-level throttle valve, single-stage choke valve or proportioning valve.

6. quantitative molten metal vacuum pumping device as claimed in claim 1, it is characterized in that, described vacuum breakdown device of vacuum comprises the magnetic valve B be communicated with extraneous air and the one-way throttle valve controlling gas flow, and described vacuum breakdown device of vacuum access is on vacuum generating device and jug used for heating up water assembly connecting pipe.

7. quantitative molten metal vacuum pumping device as claimed in claim 1, it is characterized in that, described jug used for heating up water assembly comprises jug used for heating up water, spool and cylinder, and described spool is located in jug used for heating up water, and cylinder is connected with spool makes spool move axially in jug used for heating up water; Described jug used for heating up water lower end is provided with gets soup mouth, described spool be displaced downwardly to when getting soup mouth with get soup mouth and coordinate and be socketed.

8. quantitative molten metal vacuum pumping device as claimed in claim 1, it is characterized in that, institute's displacement mechanism is XY axis robot.

9. quantitative molten metal vacuum pumping device as claimed in claim 8, it is characterized in that, described XY axis robot comprises column weldment, beam part and straight line module, and described beam part is laterally located on column weldment, and beam part is provided with guide rail, slide block and transverse moving support;

Described straight line module is by fixed lateral traversing carriage being connected with beam part and sliding on beam part, and described vacuum quantitative is got soup device and is arranged on straight line module and can vertically moves.