CN109282946A - A kind of part suppresses detection device and detection method - Google Patents
A kind of part suppresses detection device and detection method Download PDFInfo
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- CN109282946A CN109282946A CN201811016153.XA CN201811016153A CN109282946A CN 109282946 A CN109282946 A CN 109282946A CN 201811016153 A CN201811016153 A CN 201811016153A CN 109282946 A CN109282946 A CN 109282946A
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- Prior art keywords
- cylinder
- marking
- locating slot
- sink
- detection
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- 238000001514 detection method Methods 0.000 title claims abstract description 7
- 239000007789 gases Substances 0.000 claims abstract description 24
- 230000003028 elevating Effects 0.000 claims abstract description 14
- 239000011901 water Substances 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 3
- 230000000875 corresponding Effects 0.000 claims description 3
- 239000011261 inert gases Substances 0.000 claims description 3
- 239000001308 nitrogen Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000003570 air Substances 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 101710075621 GBLP Proteins 0.000 description 5
- 238000010586 diagrams Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 241000196435 Prunus domestica subsp. insititia Species 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 methods Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000011257 shell materials Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/06—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool
Abstract
Description
Technical field
The present invention relates to Automobile Parts Inspection technical fields, suppress detection device and detection side more particularly to a kind of part Method.
Background technique
It is also higher and higher to the precision requirement of part with the rapid development of automobile, however producing and processing automobile In part, usually inside parts can be caused to have hollow bubble or crack because of various reason reason, these parts It is in appearance and without exception, but the problems such as cracking or shell peel off then is easy to appear after being actually used in automobile component, it is easy to produce Security risk.The prior art is by means such as X-ray or sonic detections, but for some in irregular shape zero mostly Part connector, these detection modes also often have omission, and are unable to batch detection, influence production efficiency.
Summary of the invention
The present invention provides a kind of part to solve technical problem present in well-known technique and suppresses detection device and detection side Method can whether there is bubble or crack, convenience and high-efficiency in batch detection part.
The present invention includes following technical solution:
A kind of part suppresses detection device, including rack, sink, elevating mechanism, hold-down mechanism, marking mechanism, inflator Structure and control system, it is characterised in that: the central rack is equipped with sink, and rack side is equipped with the gas cabinet other side and is equipped with control Platform processed, gas cabinet is interior to be furnished with gas cylinder；Elevating mechanism is fixedly mounted at left and right sides of the sink；The elevating mechanism includes piston gas Cylinder, lifting support plate and connecting rod；The hold-down mechanism includes top board, lower platen and lifting cylinder, and hold-down mechanism is located at In the middle part of sink, it is fixedly mounted with lifting cylinder in the middle part of the lower platen, is fixedly mounted with positioning pedestal at left and right sides of lifting cylinder, is set in positioning pedestal There is locating slot, the top board is slidably connected with lifting cylinder, and card slot is equipped at left and right sides of top board；The marking mechanism includes Connecting plate and mark rifle, marking mechanism are installed at left and right sides of sink and are located at below top board, and the connecting plate is fixedly mounted with electricity and pushes away Bar；The inflation mechanism includes appendix, pressure sensor and charge valve, and described appendix one end is embedded in positioning pedestal The other end connects gas cylinder, and the charge valve is located in locating slot；The piston-cylinder is located in rack and connects lifting support plate, The lifting support plate is installed at left and right sides of lower platen respectively by connecting rod and is located on the outside of positioning pedestal；The pressure passes Sensor is electrically connected control system, and the control system is electrically connected piston-cylinder, lifting cylinder, charge valve and electric putter.
Preferably, the position of the card slot and locating slot is corresponding, the shape and detection part match of card slot and locating slot.
Preferably, the gas cylinder is provided with nitrogen or other inert gases not soluble in water.
Preferably, the mark rifle and connecting plate are fixedly mounted with by spring, and the mark rifle and locating slot correspond, described Mark rifle uses marking needle mark.
Preferably, the quantity of the locating slot is more than or equal to 2, and the quantity of the locating slot is equal to the quantity of mark rifle and waits In the quantity of card slot.
The present invention also provides a kind of part simultaneously and suppresses detection method, including feeding, compression, pressurization and blanking, special Sign is the following steps are included: part to be detected, is manually sequentially placed into locating slot and completes feeding by step 1；Step 2, control Platform processed operation lifting cylinder compresses top board and lower platen, and card slot and locating slot are by part clamping；Step 3, piston-cylinder are logical It crosses lifting support plate and connecting rod and hold-down mechanism is dropped into the water surface hereinafter, charge valve inflating pressure into part, pressure sensing Device detects when being forced into two atmospheric pressure, and charge valve stops pressurization, whether overflows bubble around artificial observation part；Step 4, Hold-down mechanism is promoted to the water surface or more by piston-cylinder, and electric putter, which releases marking mechanism, carries out mark, after marking mechanism playback Lifting cylinder promotes top board, manually removes part and observes that the part for overflowing bubble is discarded in will test.
The present invention has the advantage that and good effect:
1, whether what the present invention detected part by way of underwater inflating pressure has a bubble and crack, equipment operation letter Easily, low in cost and significant effect.
2, the present invention can carry out batch detection to part, greatly increase the production efficiency.
3, detection method of the invention is to carry out whole detection to part, and whether pass through inflating pressure and observe gas leakage and has Bubble overflows judgement, intuitive and convenient.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention.
Fig. 2 is left view structural representation of the invention.
Fig. 3 is B-B part enlarged diagram of the present invention.
Fig. 4 is A-A the schematic diagram of the section structure of the present invention.
Fig. 5 is C-C partial enlargement diagram of the present invention.
In figure, 1- rack；11- sink；12- gas cylinder；13- gas cabinet；14- console；15- charging tray；
2- elevating mechanism；21- piston-cylinder；22- goes up and down support plate；23- connecting rod；
3- hold-down mechanism；31- top board；32- lower platen；33- lifting cylinder；34- positioning pedestal；35- locating slot；36- Card slot；
4- marking mechanism；41- connecting plate；42- mark rifle；43- electric putter；44- spring；
5- inflation mechanism；51- appendix；52- pressure sensor；53- charge valve；
6- part to be detected.
Specific embodiment
It is especially exemplified by following instance and detailed in conjunction with attached drawing further to disclose invention, features and effects of the invention Carefully it is described as follows.
Embodiment: refering to attached drawing 1-5, a kind of part suppresses detection device, including rack 1, sink 11, elevating mechanism 2, pressure Tight mechanism 3, marking mechanism 4, inflation mechanism 5 and control system, it is characterised in that: sink 11, machine are housed in the middle part of the rack 1 1 side of frame is equipped with 13 other side of gas cabinet and is equipped with console 14, is furnished with gas cylinder 12 in gas cabinet 13；11 left and right sides of sink It is fixedly mounted with elevating mechanism 2；The elevating mechanism 2 includes piston-cylinder 21, lifting support plate 22 and connecting rod 23；The compacting machine Structure 3 includes top board 31, lower platen 32 and lifting cylinder 33, and hold-down mechanism 3 is located in the middle part of sink 11, in the lower platen 32 Portion is fixedly mounted with lifting cylinder 33, and positioning pedestal 34 is fixedly mounted at left and right sides of lifting cylinder 33, and positioning pedestal 34 is equipped with locating slot 35, institute It states top board 31 to be slidably connected with lifting cylinder 33, card slot 36 is equipped at left and right sides of top board 31；The marking mechanism 4 includes connecting Fishplate bar 41 and mark rifle 42, marking mechanism 4 are installed in 11 left and right sides of sink and are located at 31 lower section of top board, the connecting plate 41 It is fixedly mounted with electric putter 43；The inflation mechanism 5 includes appendix 51, pressure sensor 52 and charge valve 53, the appendix 51 One end is embedded in the other end in positioning pedestal 34 and connects gas cylinder 12, and the charge valve 53 is located in locating slot 35；The piston gas Cylinder 21 is located in rack 1 and connects lifting support plate 22, and the lifting support plate 22 is installed in pushing by connecting rod 23 respectively At left and right sides of plate 32 and it is located at 34 outside of positioning pedestal；The pressure sensor 52 is electrically connected control system, the control system electricity Even piston-cylinder 21, lifting cylinder 33, charge valve 53 and electric putter 43.The card slot 36 is opposite with the position of locating slot 35 It answers, the shape and detection part match of card slot 36 and locating slot 35.The gas cylinder 12 is provided with nitrogen or other are not soluble in water Inert gas.The mark rifle 42 is fixedly mounted with connecting plate 41 by spring 44, and the mark rifle 42 and locating slot 35 correspond, The mark rifle 42 uses marking needle mark.The quantity of the locating slot 35 is more than or equal to 2, and the quantity of the locating slot 35 is equal to The quantity of mark rifle 42 and the quantity for being equal to card slot 36.
The present invention also provides a kind of part simultaneously and suppresses detection method, including feeding, compression, pressurization and blanking, special Sign is the following steps are included: part 6 to be detected, is manually sequentially placed into locating slot 35 and completes feeding by step 1；Step 2, Console 14 operates lifting cylinder 33 and compresses top board 31 and lower platen 32, and card slot 36 and locating slot 35 are by part 6 to be detected Clamping；Hold-down mechanism 3 is dropped to the water surface hereinafter, filling by lifting support plate 22 and connecting rod 23 by step 3, piston-cylinder 21 The inflating pressure into part 6 to be detected of air valve 53, pressure sensor 52 detect that charge valve 53 stops when being forced into two atmospheric pressure It only pressurizes, whether overflows bubble around artificial observation part；Step 4, piston-cylinder 21 by hold-down mechanism 3 be promoted to the water surface with On, electric putter 43, which releases marking mechanism 4, carries out mark, and lifting cylinder 2 promotes top board 31 after marking mechanism 4 playbacks, manually It removes part and observes that the part for overflowing bubble is discarded in will test.
Step 1: sink 11 being installed, left side is fixedly mounted with gas cabinet 13, and right side is fixedly mounted with station 14, gas cabinet 13 in the middle part of rack 1 It is interior to be furnished with nitrogen gas cylinder 12,1 left and right sides spare bits placement location charging tray 15 of rack；
Step 2: assembling hold-down mechanism 3, lifting cylinder 33 is installed in the middle part of lower platen 32, is equipped at left and right sides of lifting cylinder 33 Positioning pedestal 34, each positioning pedestal 34 are equipped with 8 locating slots 35, and top board 31 is slidably mounted on elevating mechanism 33, on Pressing plate 31 each side has 8 card slots 36, and card slot 36 and locating slot 35 correspond and shape and 6 phase of part to be detected Match；
Step 3: sink 11 each side installs 2 piston-cylinders 21, and piston-cylinder 21 is located in rack 1 and connects liter Descending branch fagging 22, every piece of lifting support plate 22 are connected by two connecting rods 23 with the lower platen 32 of hold-down mechanism 3；
Step 4: installation marking mechanism 4,41 side of connecting plate connection 43 other side of electric putter are fixedly mounted with mark by spring 44 Marking mechanism 4 is installed in the left and right sides of sink 11 respectively and is located at 22 lower section of lifting support plate by rifle 42,42 quantity of mark rifle and Position is corresponding with locating slot 35；
Step 5: connection inflation mechanism 5,51 one end of appendix connection 12 other end of gas cylinder are located in positioning pedestal 34, each A charge valve 53 is equipped in locating slot 35, charge valve 53 is connected with appendix 51 and is controlled by pressure sensor 52, and pressure passes Sensor 52 is packed on lower platen 32；
Step 6: pressure sensor 52 is electrically connected control system, and control system (i.e. console) is electrically connected piston-cylinder 21, lifting Cylinder 33, charge valve 53 and electric putter 43.
Part 6 to be detected: being manually sequentially placed into locating slot 35 and complete feeding by working principle, the operation lifting of console 14 Cylinder 33 compresses top board 31 and lower platen 32, and by 6 clamping of part to be detected, piston-cylinder 21 is logical for card slot 36 and locating slot 35 It crosses lifting support plate 22 and connecting rod 23 and hold-down mechanism 3 is dropped into the water surface hereinafter, charge valve 53 is inflated into part 6 to be detected Pressurization, pressure sensor 52 detects when being forced into two atmospheric pressure, and charge valve 53 stops pressurization, is around artificial observation part Hold-down mechanism 3 is promoted to the water surface or more by no spilling bubble, piston-cylinder 21, and electric putter 43 is played the release of marking mechanism 4 Mark, lifting cylinder 2 promotes top board 31 after marking mechanism 4 playbacks, and manually removes part and observes spilling bubble in will test Part it is discarded.
Although the preferred embodiment of the present invention is described above, the invention is not limited to above-mentioned specific Embodiment, the above mentioned embodiment is only schematical, is not restrictive, those skilled in the art Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very It is multi-form.Within these are all belonged to the scope of protection of the present invention.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811016153.XA CN109282946A (en) | 2018-09-02 | 2018-09-02 | A kind of part suppresses detection device and detection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811016153.XA CN109282946A (en) | 2018-09-02 | 2018-09-02 | A kind of part suppresses detection device and detection method |
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| CN109282946A true CN109282946A (en) | 2019-01-29 |
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|---|---|---|---|---|
| JPH0481631A (en) * | 1990-07-25 | 1992-03-16 | Fujitsu Ltd | Method and apparatus for waterproof test |
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| CN207395974U (en) * | 2017-11-03 | 2018-05-22 | 重庆荣易达铝业有限公司 | A kind of automobile cylinder cover air-tightness detection tool |
| CN207629403U (en) * | 2017-12-11 | 2018-07-20 | 新昌县雷得电气有限公司 | Collect feeding, mark and is detected on integrated marking mechanism |
| CN207798350U (en) * | 2017-12-28 | 2018-08-31 | 露笑新能源技术有限公司 | A kind of screw compressor shell air-tightness water checking device |
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