CN101710039A - Device for detecting density of aluminum-nickel-cobalt permanent magnet alloy pressed blanks - Google Patents
Device for detecting density of aluminum-nickel-cobalt permanent magnet alloy pressed blanks Download PDFInfo
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- CN101710039A CN101710039A CN200910223186A CN200910223186A CN101710039A CN 101710039 A CN101710039 A CN 101710039A CN 200910223186 A CN200910223186 A CN 200910223186A CN 200910223186 A CN200910223186 A CN 200910223186A CN 101710039 A CN101710039 A CN 101710039A
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Abstract
The invention relates to a device for detecting density of powder alloy pressed blank products, and in particular provides a device for detecting the density of aluminum-nickel-cobalt permanent magnet alloy pressed blanks. The device comprises at least two drum bodies, wherein drum covers are arranged above the drum bodies; clamping strips are arranged above the drum covers and are provided with locking bolts; a sample stage is arranged in each drum body; the drum bodies are communicated through a bottom communicating pipe; the communicating pipe is provided with a communicating valve; and a vacuum stop valve and a deflation valve are arranged above the drum bodies respectively. Compared with the prior art, the device has the characteristics of reasonable design, simple structure, accurate testing process, easy operation, low implementation cost, and the like.
Description
Technical field
The present invention relates to a kind of device for detecting density of powder metallurgy pressing blank product, a kind of device for detecting density of aluminum-nickel-cobalt permanent magnet alloy pressed blanks specifically is provided.
Background technology
One of critical process of powder metallurgy production is compression moulding, the quality quality of molded blank directly influences the size and the performance of final products, and the quality of moulding blank comprises substance, size, the homogeneity of outward appearance and green density and green density, the substance of slug press, size and outward appearance are not allowed to dwell on to the importance of final products, the homogeneity of density and density also plays fundamental influence to the final mass of product, as too small as if pressed density in pressing process, then product causes easily in compacting and transfer process and lacks the limit arrisdefect, the density of sintered body does not reach requirement behind sintering, thereby influence performance, in addition, because density is too small, shrinkage factor increases in sintering process, causes the change in size of sintered products big, even defectives such as size is less than normal occur; And green density is excessive in pressing process, then cause the interior hole dimension of the product of being with endoporus bigger than normal easily, because density is too big, contraction diminishes in the sintering process, cause size bigger than normal, so the density of slug press have fundamental influence to the performance and the size of product.
In addition, the density uniformity of whole work-piece diverse location, particularly the density uniformity along the pressing direction diverse location also plays tangible influence to the performance and the size of product behind the sintering, as for the compacting a cylindrical product with holes, if it is bigger in the pressing process near part of the upper die density, and it is less near part of the lower die density, the contraction coefficient difference of product on short transverse behind the sintering then, contraction coefficient near the part of the upper die is little, and size is big, and is big near the contraction coefficient of part of the lower die, final size is little, thereby cause product concentric reducer to occur, directly cause product rejection when serious, this phenomenon often takes place in process of production.The substance of blank body, size and outward appearance all can directly be measured in the actual production process, for the complicated slug press of shape, its density and homogeneity thereof are difficult to measure with direct method, therefore will measure by other way, such as drainage.Because what slug press adopted is the dry powder compacting, there is a large amount of holes in the inside of blank, and in the process that adopts drainage measurement products density, water can directly enter into the slug press the inside, causes the bad density of hair to measure.
Summary of the invention
The present invention be directed to above deficiency, provide a kind of reasonable in design, simple in structure, test process accurately, the device for detecting density of aluminum-nickel-cobalt permanent magnet alloy pressed blanks that processing ease and implementation cost are low.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of device for detecting density of aluminum-nickel-cobalt permanent magnet alloy pressed blanks, comprise at least two cylindrical shells, described cylindrical shell top is provided with cover, described cover top is provided with card article, described card article is provided with clamping screw, is provided with sample stage in described each cylindrical shell, and the communicating pipe by the bottom between the described cylindrical shell is connected, described communicating pipe is provided with communicating valve, and described cylindrical shell top is respectively arranged with vaccum stop valve and air release.
Be provided with O-ring seal between described cover and the cylindrical shell.
The device for detecting density of a kind of aluminum-nickel-cobalt permanent magnet alloy pressed blanks of the present invention, its principle is slug press is placed on the sample stage of one of them sealing bore, build and lock with cover, be evacuated to certain vacuum, the intrapore gas of slug press is extracted out, in the another one sealing bore, load onto 3/4 gasoline, open communicating valve, because two interior air pressure differences of sealing bore cause gasoline to flow to the sealing bore at slug press place, when slug press is immersed in the gasoline fully, gasoline with complete filling the hole of slug press, with blank taking-up carrying out drainage density measurement, because gasoline is incompatible with water, therefore gasoline can will be filled the hole of blank well when product immerses in the water, stops water to enter in the hole of slug press.
Utilize the device for detecting density of a kind of aluminum-nickel-cobalt permanent magnet alloy pressed blanks of the present invention that simple shape or complex-shaped slug press are carried out density measurement, all can play good effect, especially for the complex-shaped and direct blank of volume calculated, adopt drainage can measure its density accurately, have reasonable in design, simple in structure, test process accurately, processing ease and the low characteristics of implementation cost.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a kind of structural representation of device for detecting density of aluminum-nickel-cobalt permanent magnet alloy pressed blanks;
Fig. 2 utilizes the present invention to carry out the work synoptic diagram that drainage is measured.
1, clamping screw; 2, card article; 3, O-ring seal; 4, cover; 5, vaccum stop valve; 6, cylindrical shell; 7, sample stage; 8, communicating pipe; 9, air release; 10, communicating valve; 11, electronic balance; 12, slug press; 13, beaker; 14, thin copper wire; 15, support.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Provide a most preferred embodiment below:
As shown in Figure 1, a kind of device for detecting density of aluminum-nickel-cobalt permanent magnet alloy pressed blanks, comprise at least two cylindrical shells 6, described cylindrical shell 6 tops are provided with cover 4, and described cover 4 tops are provided with card article 2, and described card article 2 is provided with clamping screw 1, be provided with sample stage 7 in described each cylindrical shell 6,6 communicating pipes 8 by the bottom were connected between the described cylindrical shell, and described communicating pipe 8 is provided with communicating valve 10, and described cylindrical shell 6 tops are respectively arranged with vaccum stop valve 5 and air release 9.
Be provided with O-ring seal 3 between described cover 4 and the cylindrical shell 6.
Also need the miscellaneous equipment of Density Detection during case is implemented, comprise 1 of electronic balance, be accurate to 0.001g, 1 in 300ml beaker, distilled water 200ml, thin copper wire is some.
With balance 11 zero clearings, slug press 12 is placed on the balance 11 claims that its weight is m
1
At first all valves of the present invention (5,9,10) are closed, unscrew clamping screw 1 on the left side sealed cylinder 6, card article 2 is taken out, simultaneously cover 4 and O-ring seal 3 are taken out, slug press 12 is placed on the sample stage 7, with O-ring seal 3 wiped clean, be enclosed within on the cover 4 and and be contained on the sealing bore 6, card article 2 and clamping screw 1 tightened on the card together with O-ring seal 3 with cover 4.Open the vaccum stop valve 5 on the left side cylindrical shell 6, start vacuum pump and will be evacuated to certain vacuum in the left side sealing bore 6, close the vaccum stop valve 5 on the left side, open the cover 4 of the right sealing bore 6, in tube, inject gasoline, injection rate IR is about 3/4 of sealing bore volume, open communicating valve 10 after finishing, make sealing bore 6 interior gasoline in the right flow to the sealing bore on the left side by communicating valve 10, and be immersed in slug press 12 in the gasoline fully, gasoline is closed communicating valve 10 with the hole of complete filling slug press 12 at this moment, opens the air release 9 of left side cylindrical shell 6, air is put into sealing bore 6, make sealing bore 6 inside and outside air pressure balances, unscrew the clamping screw 1 on the left side sealed cylinder 6, card article 2 is taken out, simultaneously cover 4 and O-ring seal 3 are taken out, slug press 12 is taken out from sample stage 7, and this moment, sample was handled well, can carry out the drainage density measurement.
The synoptic diagram of employing drainage density measurement as shown in Figure 2, beaker 13 is installed distilled water to be placed on the electronic balance 11, zero clearing, to tie up through the slug press 12 that immersion oil is handled with thin copper wire 14, the other end of thin copper wire 14 hangs on the support 15, slug press 12 is immersed in the water fully and can not contacts with the sidewall and the bottom surface of beaker 13, reads the numerical value that electronic balance 11 shows this moment, is designated as m
2According to Archimedes principle, the size of object suffered buoyancy in water equals the weight of its water that arranges, and is irrelevant with the structure and the feature of interior of articles,
Be F
Floating=m
2G=ρ
WaterGv
Row
So
So density of slug press
Adopt device involved in the present invention can measure slug press exactly, the density of particularly complex-shaped slug press can be controlled the product quality of slug press well for compacted products.
In addition, the inhomogeneity detection of slug press also is to adopt to use the same method, and just a slug press is divided into two sections, detects its density respectively and gets final product.
Above-described embodiment, the present invention embodiment a kind of more preferably just, the common variation that those skilled in the art carries out in the technical solution of the present invention scope and replacing all should be included in protection scope of the present invention.
Claims (2)
1. the device for detecting density of an aluminum-nickel-cobalt permanent magnet alloy pressed blanks, comprise at least two cylindrical shells, described cylindrical shell top is provided with cover, described cover top is provided with card article, and described card article is provided with clamping screw, it is characterized in that, be provided with sample stage in described each cylindrical shell, communicating pipe by the bottom between the described cylindrical shell is connected, and described communicating pipe is provided with communicating valve, and described cylindrical shell top is respectively arranged with vaccum stop valve and air release.
2. the device for detecting density of a kind of aluminum-nickel-cobalt permanent magnet alloy pressed blanks according to claim 1 is characterized in that, is provided with O-ring seal between described cover and the cylindrical shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910223186A CN101710039A (en) | 2009-11-13 | 2009-11-13 | Device for detecting density of aluminum-nickel-cobalt permanent magnet alloy pressed blanks |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910223186A CN101710039A (en) | 2009-11-13 | 2009-11-13 | Device for detecting density of aluminum-nickel-cobalt permanent magnet alloy pressed blanks |
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| CN101710039A true CN101710039A (en) | 2010-05-19 |
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| CN200910223186A Pending CN101710039A (en) | 2009-11-13 | 2009-11-13 | Device for detecting density of aluminum-nickel-cobalt permanent magnet alloy pressed blanks |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721629A (en) * | 2011-03-29 | 2012-10-10 | 厦门钨业股份有限公司 | A powder compact density uniformity characterization method |
| CN103091193A (en) * | 2013-02-21 | 2013-05-08 | 江苏丘陵地区镇江农业科学研究所 | Method and device for rapidly measuring compactness of head of head cabbage |
| CN103994798A (en) * | 2014-05-23 | 2014-08-20 | 包头市太阳满都拉电缆有限公司 | Air-pressure method volume measurement device and an air-pressure method density measurement method |
| CN105445146A (en) * | 2015-12-04 | 2016-03-30 | 成都信息工程大学 | Novel soft magnetic ring density testing device |
| CN117949344A (en) * | 2024-03-27 | 2024-04-30 | 中国重型机械研究院股份公司 | Titanium and titanium alloy electrode integrated forming density detection device |
-
2009
- 2009-11-13 CN CN200910223186A patent/CN101710039A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721629A (en) * | 2011-03-29 | 2012-10-10 | 厦门钨业股份有限公司 | A powder compact density uniformity characterization method |
| CN103091193A (en) * | 2013-02-21 | 2013-05-08 | 江苏丘陵地区镇江农业科学研究所 | Method and device for rapidly measuring compactness of head of head cabbage |
| CN103091193B (en) * | 2013-02-21 | 2015-08-26 | 江苏丘陵地区镇江农业科学研究所 | A kind of cabbage leaf-head degree of packing method for fast measuring and device |
| CN103994798A (en) * | 2014-05-23 | 2014-08-20 | 包头市太阳满都拉电缆有限公司 | Air-pressure method volume measurement device and an air-pressure method density measurement method |
| CN105445146A (en) * | 2015-12-04 | 2016-03-30 | 成都信息工程大学 | Novel soft magnetic ring density testing device |
| CN117949344A (en) * | 2024-03-27 | 2024-04-30 | 中国重型机械研究院股份公司 | Titanium and titanium alloy electrode integrated forming density detection device |
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Open date: 20100519 |