CN110125342A - A kind of positioning of sand casting casting mold inside temperature thermocouple and fixing means - Google Patents
A kind of positioning of sand casting casting mold inside temperature thermocouple and fixing means Download PDFInfo
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- CN110125342A CN110125342A CN201910501359.XA CN201910501359A CN110125342A CN 110125342 A CN110125342 A CN 110125342A CN 201910501359 A CN201910501359 A CN 201910501359A CN 110125342 A CN110125342 A CN 110125342A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
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Abstract
The invention discloses a kind of positioning of temperature thermocouple inside sand casting casting mold and fixing means, the positioning of sand mould material with self-curing shaping characteristic and fixing means are the positioning and fixation for realizing thermocouple using sand lump sculpting method by wooden die, during sand mold is moulded, the sand lump for having fixed thermocouple is fixed in whole sand mold, thermocouple is connected with multichannel temperature acquisition equipment, the casting of molten metal in sand mold measures the temperature data of specified location in casting process medium casting and sand mold；The positioning of sand mould material without self-curing shaping characteristic and fixing means are the positioning and fixation that thermocouple is realized by sheet metal with holes, during sand mold is moulded, the sheet metal for having fixed thermocouple is placed in sand mold, thermocouple is connected with multichannel temperature acquisition equipment, the casting of molten metal in sand mold measures the temperature data of specified location in process of setting medium casting and sand mold.
Description
Technical field
The invention belongs to metal casting forming technology field, temperature thermocouple inside specially a kind of sand casting casting mold
Positioning and fixing means.
Background technique
Determination method about casting and the mold―metal interface coefficient of heat transfer has very much, and what use was relatively broad at present is inverse
Method.One of application principle assumes that casting and the hot-fluid of casting mold heat exchange interface are constant in a period of time, when calculating this section
Interior casting perhaps the temperature field in casting mold further according to certain location points in the casting or casting mold of actual measurement temperature curve, repeatedly
Generation amendment interface heat flux, and then solve the interface heat exchange coefficient between casting and casting mold.Want to obtain certain in casting or casting mold
The temperature curve of a little positions needs to arrange corresponding thermocouple temperature collection data at different location in casting and casting mold.
Sand mold has preferable gas permeability compared with metal mold, but its heating conduction is poor, and sand mold in process of setting
With deformability.The positioning of thermocouple and the fixed shaping characteristic for needing to consider sand mold in sand mold.As the forming of clay sand mold is main
Ensure that molding sand has certain intensity and hardness by artificial tamping operation, and resin bonded sand mould then relies on the solidified forming of itself.
When carrying out the casting experiment of aluminium alloy or magnesium alloy in sand mold, only relies on thermocouple itself and realize in casting or sand mold
Positioning is difficult with fixation.It is viscous in hand compaction if fixing thermocouple before clay sand molding in the casting experiment of clay sand mold
During soil sand, thermocouple can be moved, and thermometric point location is inaccurate；If fixing thermocouple after the completion of clay sand molding, because of compacting
Clay-bonded sand afterwards has some strength and hardness, and thermocouple is difficult interspersed fixation, and can not obtain the position of thermocouple temperature measurement point.
And in resin bonded sand mould casting experiment, the positioning of thermocouple must then be realized with fixed before resin sand curing reaction is completed, no
Then thermocouple can not intert and be positioned in sand mold after resin sand solidification.
Patent 201310462506.X[1]Disclose the measurement side in sand mold temperature field in a kind of casting of plate magnesium alloy sand mold
Method proposes and prepares sand lump in advance using metal die, and the thermocouple for being used for thermometric is fixed in sand lump.This method is for tool
Have the sand mold of solidification effect more feasible, and it is this kind of for clay sand mold need to through hand compaction operate forming sand mould material less
Properly, because after sand lump merging, during subsequent artefacts' compacting, clay sand lump is easily broken, and the positioning of thermocouple is caused to be lost
Effect.
Summary of the invention
The purpose of the present invention is to provide a kind of positioning of temperature thermocouple inside sand casting casting mold and fixing means, can
To ensure the accurate positionin and fixation of thermocouple temperature measurement point, convenient for the temperature curve in acquisition casting and sand mold.
In order to achieve the above object, the present invention adopts the following technical scheme:
A kind of positioning of sand casting casting mold inside temperature thermocouple and fixing means, including it is special with self-curing forming
The positioning of the sand mould material of point and the positioning of fixing means and the sand mould material without self-curing shaping characteristic and fixation side
Method；
The positioning of the sand mould material with self-curing shaping characteristic and fixing means, include the following steps:
1) production prepares the wooden model of sand lump and fixed thermocouple, the wooden model include be " returning " font identical size it is upper
Mould and lower die；One or more is provided in two side corresponding positions of the lower die parallel with casting and sand mold heat exchange interface to run through
Property positioning straight trough so that one or more penetrability positioning straight trough is perpendicular to casting and sand mold heat exchange interface, for placing measurement
The thermocouple of temperature curve in casting；Multiple positioning blinds are opened in the one side of the lower die vertical with casting and sand mold heat exchange interface
Slot, as the thermometric point location of the thermocouple of temperature curve in measurement sand mold, another side is provided with blind slot corresponding position and passes through
Wearing property positions straight trough, for placing the rear end of the thermocouple of temperature curve in measurement sand mold, so that penetrability positioning straight trough is parallel
In casting and sand mold heat exchange interface；
2) lower die of wooden model is placed in the horizontal plane, will need to be arranged in the thermocouple in casting lie low lower die with
In the vertical penetrability positioning straight trough of the heat exchange interface of casting and sand mold；The temperature measuring point of the thermocouple in sand mold will be needed to be arranged in
It is fixed in positioning blind slot, and the rear end of thermocouple lies low and positions directly in the penetrability parallel with the heat exchange interface of casting and sand mold
In slot, it is arranged so the thermocouple location intersection so that being located inside casting and sand mold, reduces the possibility that thermocouple location changes
Property；
3) upper mold of wooden model and lower die are molded, and wooden model is fixed in the horizontal plane, prevented during back-up sand, heat
Galvanic couple position changes；
4) by in the sand mould material of self-curing shaping characteristic filling wooden model, the sand mould material is waited to be formed by curing sand lump
Afterwards, the demoulding of sand lump is carried out；
5) in whole sand mold moulding, the thermocouple front end bending being placed in casting, and sand lump surface and casting is wooden
Mould surface fits closely, and back-up sand operation is then carried out in sandbox, waits the sand of the sand mould material with self-curing shaping characteristic
After the completion of type integrally curing, the wooden model of casting is deviate from from sand mold, the temperature measuring point for being placed on the thermocouple in casting carries out position
Set adjustment；
6) thermocouple of temperature curve in casting will be measured and measure the thermocouple of temperature curve and multichannel temperature in sand mold
Degree acquisition equipment is connected, and sets frequency acquisition, and first temperature collection implements casting experiment again, selects temperature to adopt according to experiment demand
The total duration of collection；
The positioning of the sand mould material without self-curing shaping characteristic and fixing means, include the following steps:
1) production prepares the sheet metal of sand lump and fixed thermocouple, selects good heat conductivity, and thickness is less than the gold of 2mm
Belong to thin slice, choose sheet metal certain on one side as be close to casting and sand mold heat exchange interface side, referred to as position side, in metal foil
The hole of rule distribution is made on the parallel lines of on piece Distance positioning side pre-determined distance；
2) thermocouple being arranged in sand mold and casting is passed through into metal foil in a manner of " s " type in mutually perpendicular directions
The hole of piece is interspersed to be fixed；
3) in the sand mold modeling process for the sand mould material for not having self-curing shaping characteristic, sand mold is inserted in sandbox
Material, and artificial tamping operation is carried out, the part sand mould material tamped near casting wooden model surface is then taken out,
To there is enough space layout sheet metals；Casting wooden model surface is close on the positioning side of sheet metal, and by metal foil
Piece rear end is to be inserted into far from the part bending for being arranged in thermocouple temperature measurement point in sand mold without self-curing shaping characteristic
In sand mould material, ensure that the drift of position in horizontal direction will not occur for thermocouple as far as possible；Then to before for arrangement metal
Thin slice and in reserved space insert sand mould material；
4) after the completion of the sand mold of the sand mould material without self-curing shaping characteristic is moulded, the wooden model of casting is taken off
Out, and the temperature measuring point of thermocouple that is placed in casting carries out position adjustment；
5) thermocouple of temperature curve in casting will be measured and measure the thermocouple of temperature curve and multichannel temperature in sand mold
Degree acquisition equipment is connected, and sets frequency acquisition, and first temperature collection implements casting experiment again, selects temperature to adopt according to experiment demand
The total duration of collection.
Preferably, the sand mould material with self-curing shaping characteristic is resin sand, does not have self-curing forming
The sand mould material of feature is clay-bonded sand.
Preferably, convenient for sand lump demould, the upper die and lower die include the identical left and right two parts of shape and size or on
Other than the inner surface contacted with casting and sand mold heat exchange interface, remaining inner surface is handled for mould and lower die.
It is further preferred that the method that remaining described inner surface is handled are as follows: reverse mould angle is arranged in inner surface, so that hanging down
Directly in the mode cross section up and down of horizontal direction at right-angled trapezium, and the side at upper and lower mould molding is shorter by one in trapezoidal parallel edges
Side.
Preferably, in the positioning and fixing means of the sand mould material with self-curing shaping characteristic, the depth of slot
Greater than thermoelectricity dual diameter 0.5mm.
Preferably, in the positioning and fixing means of the sand mould material with self-curing shaping characteristic, for fixing
The length of the positioning blind slot of thermocouple temperature measurement point is 1~2mm in sand mold, and it is corresponding to be arranged in the point of the thermocouple temperature measurement in sand mold
Positioning blind slot length need to be consistent, it is therefore an objective to ensure that multiple temperature measuring points of thermocouple in sand mold cross the vertical heat exchange interface of same
Straight line.
The present invention has positioning and the fixing means of the sand mould material of self-curing shaping characteristic, and this method has following spy
Point: 1, preparing the sand lump of fixed thermocouple using wooden die, and mold materials easily obtain, at low cost, and the processing method of wooden model
It simply, can be for wooden model design specially treated convenient for thermocouple positioning and the demoulding of sand lump；2, the temperature measuring point position of thermocouple can
Control, can design according to demand thermocouple temperature measurement point arrive casting and sand mold heat exchange interface distance, and sand lump have centainly it is strong
Degree and hardness, it can be ensured that for thermocouple in subsequent back-up sand and sand mold forming process, thermocouple temperature measurement point position is constant；3, sand lump
Material is identical as sand mould material, does not influence the heat transfer of sand mold itself；4, the sand lump shape for using sand lump wooden model to prepare for bulk,
Size by designing wooden model can regulate and control the sand lump size for fixing thermocouple.
The present invention does not have the positioning of the sand mould material of self-curing shaping characteristic and fixing means, this method are to pass through band
The sheet metal in hole realizes that the positioning and fixation of thermocouple will fix thermocouple during sand mold is moulded
Sheet metal is placed in sand mold, and thermocouple is connected with multichannel temperature acquisition equipment, the casting of molten metal in sand mold, measurement
The temperature data of specified location in process of setting medium casting and sand mold.
The present invention does not have positioning and the fixing means of the sand mould material of self-curing shaping characteristic, and this method has as follows
Feature: 1, fixed device is easy to get with metal material, and cost is relatively low, and operability is high；2, the temperature measuring point position of thermocouple is controllable, can
With design according to demand thermocouple temperature measurement point to casting and sand mold heat exchange interface distance；3, fixed device materials have preferable
Mechanical performance avoids occurring the movement of thermocouple location by physical damnification in the process of manual compaction's clay-bonded sand, and compared with
Material is not in apparent ruckbildung in hot environment, and thermocouple can be effectively fixed under higher temperatures environment；4, fixed dress
Itself good heat conductivity is set, sand mold itself heat transfer is influenced smaller；5, fixed device can repeatedly use.
In conclusion the invention proposes a kind of positioning of temperature thermocouple inside sand casting casting mold and fixing means,
The present invention is compared with traditional direct thermometry using in thermocouple measurement casting and sand mold, thermocouple consolidating in sand mold
Determine effect more preferably and positioning is more accurate；And in casting experiment, it can effectively acquire specified location in casting and sand mold
Temperature curve provides data supporting for inverse casting and sand mold interface heat exchange coefficient.
Detailed description of the invention
Fig. 1 is wooden model and wooden model in the positioning and fixing means for the sand mould material that the present invention has self-curing shaping characteristic
Middle placement thermocouple schematic diagram.
Fig. 2 is that reverse mould angle schematic diagram is arranged in upper die and lower die inner surface.
Fig. 3 is thermocouple arrangement schematic diagram.
Fig. 4 is sheet metal in the positioning and fixing means for the sand mould material that the present invention does not have self-curing shaping characteristic
And thermocouple schematic diagram is placed in metal foil.
Fig. 5 is casting during alloy sand casting and the temperature curve in casting mold, and wherein Fig. 5 a is the casting of resin sand sand mold
The temperature curve in process medium casting and casting mold is made, Fig. 5 b is that the temperature in clay-bonded sand sand casting process medium casting and casting mold is bent
Line.
Specific embodiment
The present invention is described in further details with reference to the accompanying drawings and detailed description.
The positioning of temperature thermocouple and fixing means inside a kind of sand casting casting mold of the present invention, including with self-curing
The positioning of the sand mould material of shaping characteristic and the positioning of fixing means and the sand mould material without self-curing shaping characteristic with
Fixing means.
As shown in Figure 1, positioning and the fixing means of the sand mould material with self-curing shaping characteristic, including walk as follows
It is rapid:
1, production prepares the wooden model of sand lump and fixed thermocouple, the wooden model include be " returning " font identical size it is upper
Mould and lower die, upper die and lower die other than the inner surface contacted with casting and sand mold heat exchange interface, located by remaining inner surface
Reason demoulds convenient for sand lump, and specific processing method is as shown in Fig. 2, be arranged reverse mould angle in inner surface, so that perpendicular to horizontal direction
Upper and lower mode cross section is at right-angled trapezium, and the side at upper and lower mould molding is one side shorter in trapezoidal parallel edges；With casting and
Two side corresponding positions of the parallel lower die of sand mold heat exchange interface are provided with one or more penetrability positioning straight troughs, so that one
Or multiple penetrabilities position straight troughs perpendicular to casting and sand mold heat exchange interface, for placing the thermoelectricity of temperature curve in measurement casting
It is even；Multiple positioning blind slots are opened in the one side of the lower die vertical with casting and sand mold heat exchange interface, as temperature in measurement sand mold
The thermometric point location of the thermocouple of curve, another side and blind slot corresponding position are provided with penetrability positioning straight trough, for placing
The rear end of the thermocouple of temperature curve in sand mold is measured, so that penetrability positioning straight trough is parallel to casting and sand mold heat exchange interface；
2, the lower die of wooden model is placed in horizontal table top, the thermocouple for needing to be arranged in casting is lain low in lower die
In the penetrability positioning straight trough vertical with the heat exchange interface of casting and sand mold；The thermometric of the thermocouple in sand mold will be needed to be arranged in
Point is fixed in positioning blind slot, and the rear end of thermocouple lies low in the penetrability positioning parallel with the heat exchange interface of casting and sand mold
In straight trough, it is arranged so so that the thermocouple location being located inside casting and sand mold intersects, what reduction thermocouple location changed can
It can property；
3, the upper mold of wooden model and lower die are molded, and wooden model is fixed in horizontal table top using clip, prevent from filling out
During sand, thermocouple location changes；
4, by sand mould material (resin sand) the filling wooden model with self-curing shaping characteristic, sand mould materials is waited to solidify shape
After sand lump, the demoulding of sand lump is carried out；
5, in whole sand mold moulding, the thermocouple front end bending being placed in casting, and sand lump surface and casting is wooden
Mould surface fits closely, and back-up sand operation is then carried out in sandbox, after the completion of waiting sand molds integrally curing, by the wooden model of casting from sand
Deviate from type, the temperature measuring point for being placed on the thermocouple in casting carries out position adjustment；
6, by the thermocouple and multichannel temperature of temperature curve in the thermocouple and measurement sand mold of temperature curve in measurement casting
Degree acquisition equipment is connected, and sets frequency acquisition, first starts software collection temperature and implements casting experiment again, according to experiment demand choosing
Select the total duration of temperature acquisition.
As shown in figure 4, not having positioning and the fixing means of the sand mould material of self-curing shaping characteristic, including walk as follows
It is rapid:
1, thickness is taken to be less than the sheet metal of 2mm, casting and sand mold heat exchange are close in certain conduct on one side for choosing sheet metal
Interface while (referred to as position for while), rule distribution is made on the parallel lines of Distance positioning side pre-determined distance on sheet metal
Hole.
2, the thermocouple being arranged in sand mold and casting is passed through into metal foil in a manner of " s " type in mutually perpendicular directions
The hole of piece is interspersed to be fixed；
3, in the sand mold modeling process for the sand mould material for not having self-curing shaping characteristic, sand mold is inserted in sandbox
Material, and artificial tamping operation is carried out, the part sand mould material tamped near casting wooden model surface is then taken out,
To there is enough space layout sheet metals；Casting wooden model surface is close on the positioning side of sheet metal, and by metal foil
Piece rear end (far from the part for being arranged in thermocouple temperature measurement point in sand mold) bending, is inserted into clay-bonded sand, ensures thermoelectricity as far as possible
The drift of position in horizontal direction will not occasionally occur；Then sand mold is inserted into space reserved for arrangement sheet metal before
Material；
4, after the completion of the sand mold of the sand mould material without self-curing shaping characteristic is moulded, the wooden model of casting is taken off
Out, and the temperature measuring point of thermocouple that is placed in casting carries out position adjustment；
5, by the thermocouple and multichannel temperature of temperature curve in the thermocouple and measurement sand mold of temperature curve in measurement casting
Degree acquisition equipment is connected, and sets frequency acquisition, first starts software collection temperature and implements casting experiment again, according to experiment demand choosing
Select the total duration of temperature acquisition.
Embodiment
As shown in Figure 1, positioning and the fixing means concrete operation step of the sand mould material with self-curing shaping characteristic:
1, resin sand material, casting die and sand lump wooden model are got out, wherein shape, size phase of the casting die with casting
Together, shape is plate, and length, width and height are respectively 100mm, 100mm, 30mm.
2, the lower die of sand lump wooden model is placed in horizontal table top, will needs to be arranged in three thermocouples and cloth in sand mold
The thermocouple (diameter is 1mm) being placed in casting positions straight trough by the penetrability that depth is 1.5mm and is fixed on wooden model
Lower die in, wherein being 1mm for the fixed positioning blind slot length for being placed in thermocouple temperature measurement point in sand mold, as shown in figure 3, being placed in
The distance of heat exchange interface of the temperature measuring point of thermocouple in sand mold to casting and sand mold is respectively 2mm, 5mm and 10mm.Using solid
Wooden model after molding is fixed in horizontal table top by clamp, it is ensured that the temperature measuring point of thermocouple does not change；
3, resin bonded sand mould material is filled into sand lump wooden model, it, will after the completion of the resin bonded sand mould material solidification in wooden model
Fixture for fixing wooden model is shed, and the demoulding of sand lump can be completed in tapping wooden model edge；
4, casting die is arranged in sand mold, sand lump surface is close to the surface of casting die, carries out filling out for resin sand
It fills；
5, after the completion of whole sand mold moulding, casting wooden model is deviate from from sand mold, by the thermocouple being arranged in casting
The position of temperature measuring point is adjusted；
6, by the thermocouple and multichannel temperature of temperature curve in the thermocouple and measurement sand mold of temperature curve in measurement casting
Acquisition Instrument connection is spent, Acquisition Instrument is opened, confirms thermocouple temperature collection situation；
7, implement casting and thermometric experiment, measure the thermocouple of temperature curve and temperature curve in measurement sand mold in casting
The Thermocouple Temperature Acquisition time is selected according to demand.
As shown in figure 4, not having the positioning and fixing means concrete operations step of the sand mould material of self-curing shaping characteristic
It is rapid:
1, clay sand mould material, casting die and fixed device foil material are got out, wherein casting die with
Shape, the size of casting are identical, and length, width and height are respectively 100mm, 100mm and 30mm, and sheet metal is with a thickness of 1mm, length
80mm, width 40mm, Circularhole diameter is 1.5mm on sheet metal；
2, be arranged in sand mold three thermocouples and the thermocouple (diameter is 1mm) being arranged in casting are logical
The hole for crossing on sheet metal rule distribution is fixed on sheet metal, is placed in the temperature measuring point of the thermocouple in sand mold to casting and sand
The distance of the heat exchange interface of type is respectively 2mm, 6mm and 10mm；
3, casting die is arranged in sand mold, the back-up sand in sandbox, tamping operation is carried out to clay-bonded sand, by sheet metal
Positioning side be close to casting die surface, while it is length bend is (separate to be arranged in sand for the sheet metal tail end of 30mm
The part of thermocouple temperature measurement point in type), it is inserted into sand mold, prevents thermocouple appearance position during sand mold compacting from changing；
Then sand mould material is inserted into space reserved for arrangement sheet metal before；
4, after the completion of whole sand mold moulding, casting wooden model is deviate from from sand mold, by the thermocouple being arranged in casting
The position of temperature measuring point is adjusted；
5, by the thermocouple and multichannel temperature of temperature curve in the thermocouple and measurement sand mold of temperature curve in measurement casting
Acquisition Instrument connection is spent, Acquisition Instrument is opened, confirms thermocouple temperature collection situation；
6, implement casting and thermometric experiment, measure the thermocouple of temperature curve and temperature curve in measurement sand mold in casting
The Thermocouple Temperature Acquisition time is selected according to demand.
Resin sand casting experiment and clay-bonded sand casting experiment medium casting and the variation of sand mold internal temperature such as Fig. 5 a and figure in Fig. 5
Shown in 5b.
Claims (6)
1. the positioning of temperature thermocouple and fixing means inside a kind of sand casting casting mold, it is characterised in that: including having itself
Sand mould material of the positioning of the sand mould material of solidified forming feature with fixing means and without self-curing shaping characteristic is determined
Position and fixing means；
The positioning of the sand mould material with self-curing shaping characteristic and fixing means, include the following steps:
1) production prepares the wooden model of sand lump and fixed thermocouple, the wooden model include be " returning " font identical size upper mold with
Lower die；It is fixed that one or more penetrabilities are provided in two side corresponding positions of the lower die parallel with casting and sand mold heat exchange interface
Position straight trough, so that one or more penetrability positioning straight troughs are used to place measurement casting perpendicular to casting and sand mold heat exchange interface
The thermocouple of interior temperature curve；Multiple positioning blind slots are opened in the one side of the lower die vertical with casting and sand mold heat exchange interface, are made
For the thermometric point location of the thermocouple of temperature curve in measurement sand mold, another side and blind slot corresponding position are provided with penetrability and determine
Position straight trough, for placing the rear end of the thermocouple of temperature curve in measurement sand mold, so that penetrability positioning straight trough is parallel to casting
With sand mold heat exchange interface；
2) lower die of wooden model is placed in the horizontal plane, the thermocouple for needing to be arranged in casting is lain low in lower die and casting
In the penetrability positioning straight trough vertical with the heat exchange interface of sand mold；The temperature measuring point for needing to be arranged in thermocouple in sand mold is fixed
In positioning blind slot, and the rear end of thermocouple lies low and positions straight trough in the penetrability parallel with the heat exchange interface of casting and sand mold
In, it is arranged so so that a possibility that thermocouple location being located inside casting and sand mold intersects, and reduction thermocouple location changes；
3) upper mold of wooden model and lower die are molded, and wooden model is fixed in the horizontal plane, is prevented during back-up sand, thermocouple
Position changes；
4) it will be inserted in wooden model with the sand mould material of self-curing shaping characteristic, after waiting the sand mould material to be formed by curing sand lump,
Carry out the demoulding of sand lump；
5) in whole sand mold moulding, the thermocouple front end bending being placed in casting, and by sand lump surface and casting wooden model table
Face fits closely, and back-up sand operation is then carried out in sandbox, waits the sand mold of the sand mould material with self-curing shaping characteristic whole
After the completion of body solidification, the wooden model of casting is deviate from from sand mold, the temperature measuring point for being placed on the thermocouple in casting carries out position tune
It is whole；
6) thermocouple of temperature curve in the thermocouple and measurement sand mold of temperature curve in measurement casting is adopted with multichannel temperature
Collection equipment is connected, and sets frequency acquisition, and first temperature collection implements casting experiment again, according to experiment demand selection temperature acquisition
Total duration；
The positioning of the sand mould material without self-curing shaping characteristic and fixing means, include the following steps:
1) production prepares the sheet metal of sand lump and fixed thermocouple, selects good heat conductivity, and thickness is less than the metal foil of 2mm
Piece, choose sheet metal certain on one side as be close to casting and sand mold heat exchange interface side, referred to as positioning side, on sheet metal
The hole of rule distribution is made on the parallel lines of Distance positioning side pre-determined distance；
2) thermocouple in sand mold and casting will be arranged in mutually perpendicular directions in a manner of " s " type through sheet metal
Hole is interspersed to be fixed；
3) in the sand mold modeling process for the sand mould material for not having self-curing shaping characteristic, sand mold material is inserted in sandbox
Material, and artificial tamping operation is carried out, the part sand mould material tamped near casting wooden model surface is then taken out, with
Just there are enough space layout sheet metals；Casting wooden model surface is close on the positioning side of sheet metal, and by sheet metal
Rear end is to be inserted into the sand without self-curing shaping characteristic far from the part bending for being arranged in thermocouple temperature measurement point in sand mold
In profile material, ensure that the drift of position in horizontal direction will not occur for thermocouple as far as possible；Then to before for arrangement metal foil
Piece and in reserved space insert sand mould material；
4) after the completion of the sand mold of the sand mould material without self-curing shaping characteristic is moulded, the wooden model of casting is deviate from,
And the temperature measuring point for the thermocouple being placed in casting carries out position adjustment；
5) thermocouple of temperature curve in the thermocouple and measurement sand mold of temperature curve in measurement casting is adopted with multichannel temperature
Collection equipment is connected, and sets frequency acquisition, and first temperature collection implements casting experiment again, according to experiment demand selection temperature acquisition
Total duration.
2. the positioning of temperature thermocouple and fixing means, special inside a kind of sand casting casting mold according to claim 1
Sign is: the sand mould material with self-curing shaping characteristic is resin sand, the sand without self-curing shaping characteristic
Profile material is clay-bonded sand.
3. the positioning of temperature thermocouple and fixing means, special inside a kind of sand casting casting mold according to claim 1
Sign is: demoulding convenient for sand lump, the upper die and lower die include the identical left and right two parts of shape and size or upper die and lower die
Other than the inner surface contacted with casting and sand mold heat exchange interface, remaining inner surface is handled.
4. the positioning of temperature thermocouple and fixing means, special inside a kind of sand casting casting mold according to claim 3
Sign is: the method that remaining described inner surface is handled are as follows: reverse mould angle is arranged in inner surface, so that perpendicular to horizontal direction
Upper and lower mode cross section is at right-angled trapezium, and the side at upper and lower mould molding is one side shorter in trapezoidal parallel edges.
5. the positioning of temperature thermocouple and fixing means, special inside a kind of sand casting casting mold according to claim 1
Sign is: in the positioning and fixing means of the sand mould material with self-curing shaping characteristic, the depth of slot is greater than thermoelectricity
Dual diameter 0.5mm.
6. the positioning of temperature thermocouple and fixing means, special inside a kind of sand casting casting mold according to claim 1
Sign is: hot in sand mold for fixing in the positioning and fixing means of the sand mould material with self-curing shaping characteristic
The length of the positioning blind slot of galvanic couple temperature measuring point is 1~2mm, and is arranged in the corresponding positioning blind slot of the point of the thermocouple temperature measurement in sand mold
Length need to be consistent, it is therefore an objective to ensure that multiple temperature measuring points of thermocouple in sand mold cross the straight line of the vertical heat exchange interface of same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910501359.XA CN110125342B (en) | 2019-06-11 | 2019-06-11 | Positioning and fixing method for temperature thermocouple inside sand casting mold |
Applications Claiming Priority (1)
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| CN114309497A (en) * | 2021-12-28 | 2022-04-12 | 华中科技大学 | Device and method for measuring temperature field of casting in lost foam casting process |
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