CN1311432A - Fast testing method and device for compact rate of molding sand - Google Patents

Fast testing method and device for compact rate of molding sand Download PDF

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Publication number
CN1311432A
CN1311432A CN 00102137 CN00102137A CN1311432A CN 1311432 A CN1311432 A CN 1311432A CN 00102137 CN00102137 CN 00102137 CN 00102137 A CN00102137 A CN 00102137A CN 1311432 A CN1311432 A CN 1311432A
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China
Prior art keywords
molding
molding sand
sand
pressure
compact rate
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CN 00102137
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Chinese (zh)
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CN1112581C (en
Inventor
李剑中
冯刚
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Dalian University of Technology
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Dalian University of Technology
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Priority to CN 00102137 priority Critical patent/CN1112581C/en
Publication of CN1311432A publication Critical patent/CN1311432A/en
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Publication of CN1112581C publication Critical patent/CN1112581C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

A quick testing method for compact rate of the molding sand is an electric testing technique of non-electricity quantity auording to the relative variation percentage of the corresponding molding sand height when the molding sand sampling in the test tube is born on two different pressures. The device for this method includes positioning mechanism, pressing head, test tube, pressure transducer, displacement transducer, sampling computer circuit and locking display circuit. Advantages are simple method, convenient use, quick and accurate, improved quality.

Description

A kind of molding sand compact rate of molding method for rapidly testing and device
The invention belongs to the electrical testing technical field of non electrical quantity, particularly a kind of molding sand compact rate of molding method for rapidly testing and device.
The molding sand compact rate of molding is the important parameter that can represent molding sand quality both at home and abroad in the tide mould sand mold casting production that the colleague generally acknowledges.Usually use two kinds of methods that it is tested at present.A kind of is manually to hold sand sample roughly it to be judged with sensation; Another kind is domestic and international universal testing method, promptly uses specialist tools and instrument, and molding sand is sampled to testing laboratory, through screening, quantitatively, punching press, measurement, calculating obtain the standard figures of molding sand compact rate of molding at last.Preceding kind method speed is fast, can judge damp model chiltern amount immediately, but fully with artificial subjective sensation, have to vary with each individual and the big shortcoming of test error; Though back a kind of method test accurately, complex operation, spended time are long, are difficult to effectively instruct instant production.
The objective of the invention is to propose a kind of method for rapidly testing and device of molding sand compact rate of molding, the test that makes molding sand compact rate of molding during the tide mould sand mold casting produced quick and precisely, and is easy and simple to handle.
The technical scheme of molding sand compact rate of molding method for rapidly testing of the present invention is: use two preset pressure values, at first non-quantitative some sand test specimens to be measured are directly packed into tried tube during test, molding sand is vertically exerted pressure in the examination tube then, in course of exerting pressure, cooperate simultaneously and adopt electronic technology, when pressure reaches first preset pressure value, automatically measure, the respective heights of sand sample in the memory examination this moment tube, when pressure reaches second preset pressure value, automatically measure the respective heights of sand sample in the examination this moment tube again, calculate highly relative percentage change of current sand sample height and correction-compensation then immediately, thereby obtain the standard figures and the demonstration of molding sand compact rate of molding with last memory.
The device of the above-mentioned molding sand compact rate of molding of realization of the present invention method for rapidly testing is made up of detent mechanism, pressure head, examination tube and pressure transducer, displacement transducer, sample-taking calculating circuit and locking display circuit.Detent mechanism is used to keep pressure head and the motion positions of trying tube, pressure transducer is used for measuring pressure head to sand sample applied pressure in the examination tube, displacement transducer is used to measure the displacement of pressure head, the output signal of pressure transducer and displacement transducer is electrically connected to sample-taking calculating circuit, sample-taking calculating circuit is then sampled to pressure measuring value and displacement measurement and is calculated, and the output signal of sample-taking calculating circuit is electrically connected to the locking display circuit, drives the locking display circuit and directly demonstrate test result simultaneously.
The inventive method is simple, device is easy to use, non-quantitative take that some sand test specimens just can record the molding sand compact rate of molding at the scene fast, the instant guidance produced, produce rejection rate, enhance productivity, improve product quality, improve production management level thereby reduce.Particularly suitable is monitored in the tide mould sand mold casting is produced and is adjusted, the control molding sand quality.
Description of drawings.
Fig. 1 is a molding sand compact rate of molding method for rapidly testing schematic diagram.
Fig. 2 is a molding sand compact rate of molding device for quick testing structural drawing.
Wherein: (1) detent mechanism; (2) pressure head; (3) examination tube; (4) pressure transducer; (5) displacement transducer; (6) sample-taking calculating circuit; (7) locking display circuit; (8) electronics storehouse; (9) spacing hole; (10) coupling link; (11) open column; (12) termination; (13) hollow cylinder; (14) end cap.
Among the figure, detent mechanism (1) is used to keep pressure head (2) and the motion positions of trying tube (3), pressure applies pressure to sand sample in the examination tube (3) by pressure head (2), pressure transducer (4) and displacement transducer (5) are measured the displacement that sand sample bears in the course of exerting pressure pressure and ram movement produce respectively, and sample-taking calculating circuit (6) is then sampled to the output electric signal of pressure transducer (4) and displacement transducer (5) and calculated and export electric signal and drives locking display circuit (7) result of calculation is locked and shows.
Below in conjunction with accompanying drawing, describe the most preferred embodiment of the inventive method and device in detail.
In the specific implementation, pressure head (2) is by electronics storehouse (8), open column (11) and termination (12) are formed, examination tube (3) by hollow cylinder (13) and with it link joint can revolve the end cap (14) that moves and constitute, hollow cylinder (13) and open column (11), termination (12) is movable to be cooperated, the function of detent mechanism (1) realizes by being fixed in coupling link (10) on the hollow cylinder (13) and the spacing hole (9) on the open column (11) and hollow cylinder (13) restriction to open column (11), coupling link (10) can move up and down in spacing hole (9), pressure transducer (4) adopt little deformation force dependent sensor and be fixed at open column (11) and termination (12) between, the two ends of displacement transducer (5) respectively with the inner face and coupling link (10) link joint of open column (11), sample-taking calculating circuit (6) adopts one-chip computer to realize and together place in the electronics storehouse (8) with the locking display circuit (7) that is made of display element.In addition, pressure transducer (4), displacement transducer (5) also with electronics storehouse (8) in sample-taking calculating circuit (6) between is electrically connected, sample-taking calculating circuit (6) is electrically connected with same placing between the interior locking display circuit (7) in electronics storehouse (8).
During use, hold earlier whole device, remove some sand samples to be measured of packing into of end cap (14) non-quantitative, traling end cap (14) then, whole device is just being stood on the last end face that certain flat sided straight is connected on electronics storehouse (8) manually exerts pressure, this moment pressure transducer (4), sample-taking calculating circuit (6) in displacement transducer (5) and electronics storehouse (8) is work automatically, when pressure reaches first preset pressure value, 1~8Kg, sample-taking calculating circuit (6) calculates and remembers the respective heights of sand sample in the examination this moment tube automatically, when pressure reaches second preset pressure value, 3~10Kg, sample-taking calculating circuit (6) calculates corresponding sand sample height more automatically, calculate the highly relative percentage change of current sand sample height then immediately with last memory, and behind correction-compensation, electric signal being given locking display circuit (7) in the electronics storehouse (8), the result who is demonstrated last acquisition by the latter is the standard examination value of molding sand compact rate of molding.

Claims (3)

1. molding sand compact rate of molding method for rapidly testing and device, it is characterized in that: described molding sand compact rate of molding method for rapidly testing uses two preset pressure values, and in pressurized process, pairing two sand sample height are tested when pressure successively reaches first preset pressure value and second preset pressure value according to sand test specimen.
2. molding sand compact rate of molding method for rapidly testing according to claim 1 and device, it is characterized in that: described molding sand compact rate of molding method for rapidly testing is by manually sand test specimen being exerted pressure, and first preset pressure value is 1~8Kg, and second preset pressure value is 3~10Kg.
3. molding sand compact rate of molding device for quick testing that designs according to claim 1 and the described method of claim 2, be made up of detent mechanism (1), pressure head (2), examination tube (3) and pressure transducer (4), displacement transducer (5), sample-taking calculating circuit (6) and locking display circuit (7), it is characterized in that: pressure transducer (4) uses little deformation force dependent sensor and is fixedly installed on the pressure head (2).
CN 00102137 2000-02-29 2000-02-29 Fast testing method and device for compact rate of molding sand Expired - Fee Related CN1112581C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 00102137 CN1112581C (en) 2000-02-29 2000-02-29 Fast testing method and device for compact rate of molding sand

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 00102137 CN1112581C (en) 2000-02-29 2000-02-29 Fast testing method and device for compact rate of molding sand

Publications (2)

Publication Number Publication Date
CN1311432A true CN1311432A (en) 2001-09-05
CN1112581C CN1112581C (en) 2003-06-25

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Application Number Title Priority Date Filing Date
CN 00102137 Expired - Fee Related CN1112581C (en) 2000-02-29 2000-02-29 Fast testing method and device for compact rate of molding sand

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CN (1) CN1112581C (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105203418A (en) * 2015-10-15 2015-12-30 郑州轻工业学院 pneumatic grain hardness detector
CN105588757A (en) * 2015-12-07 2016-05-18 河南航天精工制造有限公司 Upset test device
CN106370590A (en) * 2016-12-07 2017-02-01 中铁上海设计院集团有限公司 Testing device and testing method for determining compactness state of sandy or silty soil on site
WO2021035480A1 (en) * 2019-08-26 2021-03-04 苏州明志科技股份有限公司 Sand core strength testing device, and method for same
CN112485136A (en) * 2020-11-09 2021-03-12 马鞍山海森控电气有限公司 Digital display compaction rate tester

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105203418A (en) * 2015-10-15 2015-12-30 郑州轻工业学院 pneumatic grain hardness detector
CN105588757A (en) * 2015-12-07 2016-05-18 河南航天精工制造有限公司 Upset test device
CN106370590A (en) * 2016-12-07 2017-02-01 中铁上海设计院集团有限公司 Testing device and testing method for determining compactness state of sandy or silty soil on site
WO2021035480A1 (en) * 2019-08-26 2021-03-04 苏州明志科技股份有限公司 Sand core strength testing device, and method for same
CN112485136A (en) * 2020-11-09 2021-03-12 马鞍山海森控电气有限公司 Digital display compaction rate tester

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