CN104655369A - Air tightness detection method of engine cylinder head air passage - Google Patents
Air tightness detection method of engine cylinder head air passage Download PDFInfo
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- CN104655369A CN104655369A CN201510117598.7A CN201510117598A CN104655369A CN 104655369 A CN104655369 A CN 104655369A CN 201510117598 A CN201510117598 A CN 201510117598A CN 104655369 A CN104655369 A CN 104655369A
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- Prior art keywords
- cylinder
- cylinder cap
- clamping
- cap
- air
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- 239000003570 air Substances 0.000 title claims abstract description 34
- 238000001514 detection method Methods 0.000 title claims abstract description 12
- 239000011901 water Substances 0.000 claims abstract description 6
- 229910002027 silica gel Inorganic materials 0.000 claims description 5
- 239000000741 silica gel Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound 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Abstract
Description
Technical field
The present invention relates to a kind of engine cylinder cover air flue air-tightness detection method.
Background technology
Cylinder cover of automobile engine epithelium healing system is an extremely important assembly in engine system, and it directly has influence on the performance (output torque and power) of engine.When engine is in powerful time, need the more fuel oil that burns, certainly also more air is just needed, and in addition when idling steady, need again to regulate air capacity to ensure the burning of a small amount of fuel oil, thus meeting fuel economy requirement, these are all by regulating the air inflow of gas handling system to realize, the structure complexity very of this system.For obtaining the cylinder cap of finished product, in cylinder cap mechanical processing process detects, performance air-leakage test is a very important procedure in process.Traditional detection means is range estimation, because engine cylinder cover structure is compact, gas collection road (air intake duct and exhaust duct), water channel (cooling water circulation passage) and oil duct (firing chamber oil supply system) are in one, and adopt the method for range estimation often to cause undetected due to the factor such as the complexity of air flue, hidden (casting sand hole as cylinder cap inside), make the poor effect detected, cause the yield rate of product to be greatly affected.
Although also have use air tightness detection equipment to be immersed in the water by cylinder cap at present to detect performance impermeability, although this method can solve undetected problem, but in testing process, because cylinder cap is not fixed reliably, cylinder cap is moved in testing process, also can affect Detection results.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of engine cylinder cover air flue air-tightness detection method, to avoid cylinder cap to be moved in testing process, improves performance air-leakage test effect.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of engine cylinder cover air flue air-tightness detection method, comprise the detection operation being immersed in the water by cylinder cap and carrying out detecting, also being included in before detecting operation uses unit clamp to carry out the fixing clamping operation of clamping to cylinder cap, and clamping operation comprises following step:
(1) be placed on the holding plane of fixture by cylinder cap, cylinder cover bottom surface and holding plane are fitted;
(2) detent mechanism on fixture is used to complete the location of cylinder cap;
(3) hold-down mechanism on fixture is used to compress cylinder cap;
(4) cylinder cap is fixed on fixture, completes clamping;
Wherein, a sidepiece of cylinder cap is downward-sloping, in clamping operation, uses described hold-down mechanism to apply pressure at the inclined side of the angled sides of cylinder cap and vertical end face to cylinder cap;
Described fixture comprises base, and described holding plane, detent mechanism and hold-down mechanism are located on base;
Described hold-down mechanism comprises two pneumatic cylinders arranged in L-type and the air cylinder fixed plate for installing pneumatic cylinder be located on described base, one of them pneumatic cylinder is for diagonally to arrange upward, the cylinder head of this pneumatic cylinder stretches out towards the inclined side of the angled sides of cylinder cap, another pneumatic cylinder is for being horizontally disposed with, and the cylinder head of this pneumatic cylinder stretches out towards the vertical end face of the angled sides of cylinder cap;
Described detent mechanism comprises the spacer pin on several holding planes being located at described base, spacer pin surrounds a rectangular area at a side opening, in clamping operation, cylinder cap is placed in this rectangular area, and making the outside of angled sides in rectangular area of cylinder cap, the angled sides of cylinder cap is stretched out obliquely downward from the edge of holding plane;
The cylinder head of described pneumatic cylinder is provided with briquetting, briquetting be provided with silicagel pad for the seal face contacted with cylinder cap.
The present invention adopts technique scheme, compared with prior art, by special clamp cylinder cap in this detection method, guarantee that cylinder cap is fixed reliably, to avoid the movement of cylinder cap to have an impact to air-leakage test, and come up judge the leakage defect of performance by whole fixture submerged being observed bubble-free when detecting, testing process is very directly perceived, can avoid undetected, Detection results is better.
Accompanying drawing explanation
Fig. 1 is the front view of the fixture that the present invention adopts;
Fig. 2 is the left view of Fig. 1;
Mark in above-mentioned figure is: 1, lower shoe; 2, plate; 3, air cylinder fixed plate II; 4, air cylinder fixed plate I; 5, pneumatic cylinder I; 6, briquetting I; 7, pneumatic cylinder II; 8, silicagel pad; 9, spacer pin; 10, top panel; 11, briquetting II; 12, cylinder cap.
Embodiment
A kind of engine cylinder cover air flue of the present invention air-tightness detection method, comprise clamping operation and detect operation, clamping operation uses unit clamp to carry out clamping to cylinder cap before testing to fix, and detecting operation is use the air tightness detection equipment of prior art to be immersed in the water by cylinder cap to detect.This clamping operation comprises following step:
(1) be placed on the holding plane of fixture by cylinder cap, cylinder cover bottom surface and holding plane are fitted;
(2) detent mechanism on fixture is used to complete the location of cylinder cap;
(3) hold-down mechanism on fixture is used to compress cylinder cap;
(4) cylinder cap is fixed on fixture, completes clamping.
Adopt special clamp cylinder cap in this detection method, guarantee that cylinder cap is fixed reliably, to avoid the movement of cylinder cap to have an impact to air-leakage test, improve air-leakage test effect.
In clamping operation, the hold-down mechanism of fixture is used to apply pressure at the inclined side of the angled sides of cylinder cap and vertical end face to cylinder cap.
In detection operation, by using air tightness detection equipment, being had by clamping the whole fixture of cylinder cap to be immersed in the water, then giving the air pressure passing into certain pressure in performance, observing afterwards has bubble-free to come up, thus judges whether performance has leakage defect.
Below the unit clamp that this detection method uses is described in detail.
As Fig. 1 and Fig. 2, fixture comprises a base, base has the holding plane for laying cylinder cap 12, cylinder cap 12 is placed on holding plane in the ventricumbent mode in its end, base is also provided with the detent mechanism and hold-down mechanism for compressing cylinder cap 12 of locating for cylinder cap 12, hold-down mechanism applies pressure at the end face of cylinder cap 12 and side to cylinder cap 12.Like this, hold-down mechanism and detent mechanism match, and cylinder cap 12 firmly can be fixed on the holding plane of base, cylinder cap 12 reliable clamping can be guaranteed, prevent cylinder cap 12 to be moved, guarantee that air-leakage test carries out smoothly, make cylinder cap 12 air flue air-leakage test better effects if.
Specifically, as shown in Figure 1, a sidepiece of cylinder cap 12 to be detected is downward-sloping shape, therefore cylinder cap 12 is placed on base holding plane with the horizontal bottom bottom it, hold-down mechanism then this angled sides inclined side and vertical end face apply pressure, this position clamping effect is better.
The top panel 10 that base comprises lower shoe 1 and is supported on lower shoe 1, parallel between top panel 10 and lower shoe 1 and vertically between be separated with certain distance, the end face of top panel 10 is the holding plane for laying cylinder cap 12, large compared with top panel 10 of the area of lower shoe 1.Connected by vertical two blocks of plates 2 between top panel 10 and lower shoe 1, two blocks of plates 2 be arranged in parallel, two blocks of plates 2 insert respectively at upper and lower two ends in the slot that top panel 10 and lower shoe 1 are arranged and locate, and plate 2 is also fastenedly connected by screw and top panel 10 and lower shoe 1.This base be made up of top panel 10, lower shoe 1 and plate 2, structure is simple, and quality is light, and cost is low.In addition, the position that the end face of top panel 10 contacts with cylinder cap 12 bottom surface is also provided with silicagel pad 8, to protect cylinder cap 12 in clamping process, prevents cylinder cap 12 surface from sustaining damage.
Detent mechanism comprises the spacer pin 9 on the end face of the top panel 10 that several are located at base, these spacer pins 9 surround a rectangular area at a side opening, cylinder cap 12 is arranged in this rectangular area, the angled sides of cylinder cap 12 is also positioned at the outside of the opening part of this rectangular area, for stretching out towards the oblique below of top panel 10 the edge from top panel 10.Spacer pin 9 is cylindrical, and be arranged on top panel 10 by screw, spacer pin 9 is provided with six altogether, respectively has two at three sides of rectangular area, namely respectively has two spacer pins 9 in two ends of cylinder cap 12 and another sidepiece.This detent mechanism structure is simple, and location is reliable, can change in time when excessive deformation occurs spacer pin after multiple clamping 9.
Hold-down mechanism comprises two pneumatic cylinders arranged in L-type and the air cylinder fixed plate for installing pneumatic cylinder be located on lower shoe 1, two pneumatic cylinders are respectively pneumatic cylinder I 5 and pneumatic cylinder II 7, and corresponding two air cylinder fixed plate are respectively air cylinder fixed plate I 4 and air cylinder fixed plate II 3.Air cylinder fixed plate I 4 and air cylinder fixed plate II 3 are arranged in L-type on lower shoe 1, air cylinder fixed plate I 4 is positioned at the sidepiece of cylinder cap 12, and parallel with the side of cylinder cap 12 angled sides, be inclination, pneumatic cylinder I 5 is for diagonally to arrange upward, and the cylinder head of this pneumatic cylinder I 5 stretches out towards the inclined side of cylinder cap 12.Air cylinder fixed plate II 3 is positioned at the end of cylinder cap 12, and parallels with the vertical end face of cylinder cap 12 angled sides, and pneumatic cylinder II 7 is for being horizontally disposed with, and the cylinder head of this pneumatic cylinder II 7 stretches out towards the end face of cylinder cap 12 angled sides.When clamping cylinder cap 12, as long as connect two pneumatic cylinders, pneumatic cylinder I 5 and pneumatic cylinder II 7 compress in the side of cylinder cap 12 and end face the cylinder cap 12 being arranged in the rectangular area that spacer pin 9 surrounds, and finally make cylinder cap 12 be completely fixed.
The cylinder head of pneumatic cylinder I 5 is provided with a briquetting I 6; the cylinder head of pneumatic cylinder II 7 is provided with a briquetting II 11; briquetting I 6 and briquetting II 11 for the seal face of cylinder cap 12 surface contact on be also provided with silicagel pad 8; to protect cylinder cap 12 in clamping process, prevent cylinder cap 12 surface from sustaining damage.
Above by reference to the accompanying drawings to invention has been exemplary description; obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that method of the present invention is conceived and technical scheme is carried out; or design of the present invention and technical scheme directly applied to other occasion, all within protection scope of the present invention without to improve.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510117598.7A CN104655369A (en) | 2013-08-12 | 2013-08-12 | Air tightness detection method of engine cylinder head air passage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510117598.7A CN104655369A (en) | 2013-08-12 | 2013-08-12 | Air tightness detection method of engine cylinder head air passage |
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| Application Number | Title | Priority Date | Filing Date | |
|---|---|---|---|---|
| CN201310349283.6A Division CN103411739B (en) | 2013-08-12 | 2013-08-12 | A kind of engine cylinder cover air flue air-tightness detection method |
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| CN104655369A true CN104655369A (en) | 2015-05-27 |
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| CN201510117598.7A CN104655369A (en) | 2013-08-12 | 2013-08-12 | Air tightness detection method of engine cylinder head air passage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107314872A (en) * | 2017-06-28 | 2017-11-03 | 厦门艾尔普斯汽车零配件有限责任公司 | Automobile engine cylinder head airtight test method and device |
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Application publication date: 20150527 |
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