CN1112581C - 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 PDFInfo
- Publication number
- CN1112581C CN1112581C CN 00102137 CN00102137A CN1112581C CN 1112581 C CN1112581 C CN 1112581C CN 00102137 CN00102137 CN 00102137 CN 00102137 A CN00102137 A CN 00102137A CN 1112581 C CN1112581 C CN 1112581C
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- molding sand
- pressure
- molding
- sand
- testing
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Abstract
The present invention relates to a method and device for fast testing the compact rate of molding sand, which belongs to the technical field of electricity testing with non electrical quantity. According to the percentage of the relative change of corresponding height of a sample when the sample of molding sand in a test barrel bears two kinds of different pressure, testing is carried out. The device comprises a location mechanism (1), a pressure head (2), a testing barrel (3), a pressure sensor (4), a displacement sensor (5), a sampling and calculating circuit (6) and a locking and displaying circuit (7). The method is simple and the device is used conveniently. By manual pressing on site, the test results of the compact rate of the molding sand can be obtained immediately, fast and accurately. The method and device is especially suitable for the monitoring, the regulation and the control of the quality of the molding sand in the casting production of the molding sand of moist moulds. Therefore, the method and device has the advantages of low production waste product rate, high product quality and high production management level.
Description
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 for keeping pressure head (2) and the motion positions of trying tube (3), Pressure applies pressure to sand sample, pressure sensor (4) and position in the examination tube (3) by pressure head (2) Displacement sensor (5) is measured respectively pressure and the ram movement that sand sample bears in the course of exerting pressure and is produced The displacement of giving birth to, sample-taking calculating circuit (6) is then to pressure sensor (4) and displacement transducer (5) output electrical signals is sampled and is calculated and output electrical signals driving locking demonstration electricity Road (7) locks result of calculation and show.
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 10N～78N, 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 30N～98N, 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, it is characterized in that: use 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 is characterized in that: by manually sand test specimen being exerted pressure, and first preset pressure value is 10N～78N, and second preset pressure value is 30N～98N.
3. molding sand compact rate of molding device for quick testing that designs according to claim 1 or 2 described methods, 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).
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 CN1311432A (en) | 2001-09-05 |
| CN1112581C true CN1112581C (en) | 2003-06-25 |
Family
ID=4576293
Family Applications (1)
| 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 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1112581C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203418B (en) * | 2015-10-15 | 2017-08-29 | 郑州轻工业学院 | Air-driven type cereal-granules hardness detecting instrument |
| 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 |
| DE212019000518U1 (en) * | 2019-08-26 | 2022-04-13 | Suzhou Mingzhi Technology Co., Ltd. | Device for testing the strength of sand cores |
| CN112485136B (en) * | 2020-11-09 | 2022-09-13 | 马鞍山海森控电气有限公司 | Digital display compaction rate tester |
-
2000
- 2000-02-29 CN CN 00102137 patent/CN1112581C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1311432A (en) | 2001-09-05 |
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