CN104697456A - Method of using optical projection method to determine end gap of piston ring - Google Patents
Method of using optical projection method to determine end gap of piston ring Download PDFInfo
- Publication number
- CN104697456A CN104697456A CN201310641298.XA CN201310641298A CN104697456A CN 104697456 A CN104697456 A CN 104697456A CN 201310641298 A CN201310641298 A CN 201310641298A CN 104697456 A CN104697456 A CN 104697456A
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- China
- Prior art keywords
- piston ring
- end gap
- process island
- free state
- line length
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- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention relates to a method of using an optical projection method to determine an end gap of a piston ring in a free state, which belongs to the field of production and manufacturing of piston rings. The end gap of the piston ring is a technical parameter which needs to be strictly controlled during the piston ring production process. According to a method for detecting the end gap of the piston ring at present, the piston ring is pressed in a ring gauge with the same inner diameter as that of a cylinder sleeve, and a feeler gauge is used manually for determination or a cylinder is used for pushing a dial indicator for detection. The above detection method needs special tooling, and the detection system is complicated and low-efficiency. The invention aims at carrying out determination of the length of an outer circle outline on positive projection of the piston ring in the free state by using the optical projection imaging technology, the outline fitting technology and the outline length calculation technology, the determined value is converted into the end gap of the piston ring via specific algorithm, the converted piston ring end gap value is compared with the technological value, and automatic recognition and classification operation is carried out on the piston ring when the end gaps of the piston ring are located in different regions. The needed equipment for realizing functions of the invention is simple in structure, high in efficiency, and convenient in operation, and no special tooling is needed.
Description
Technical field
The present invention relates to a kind of optical projection method that utilizes and end-gaps method for measuring is carried out to the piston ring being in free state.The invention belongs to piston ring and manufacture field.
Background technology
Piston ring end gap clearance refers to that piston ring is installed on the gap at back piston ring two ends in cylinder sleeve of engine.This gap needs the strict technical parameter controlled in piston ring production run: gap is too small, in engine working process, easily causes piston ring stuck because expansion room is not enough, cause the engine abnormity phenomenons such as scuffing of cylinder bore to occur; Excesssive gap, can make gas leakage amount increase, can not play good sealing effectiveness, cause engine capacity to decline.At present, for detecting the method for piston ring end gap clearance, be by being pressed in the ring gauge identical with cylinder sleeve internal diameter by piston ring, craft clearance gauge measures or promotes clock gauge with cylinder and detects.This detection method needs special tooling, the complicated and poor efficiency of detection system.Each piston ring manufacturer all urgently obtains a kind of method that just can realize the accurate detection of piston ring end gap clearance by means of only simple efficient checkout equipment.
Summary of the invention
The present invention relates to a kind of optical projection method that utilizes and end-gaps method for measuring is carried out to the piston ring being in free state.The object of the invention is to utilize optical projection imaging technique, outline line fitting technique, outline line length computation technology, the orthogonal projection of the piston ring being in free state is carried out to the mensuration of its excircle configuration line length, and measured value is converted into piston ring end gap clearance by special algorithm, again the piston ring end gap clearance value after conversion and process value are compared, different interval piston ring is in piston ring end gap clearance and automatically identifies and the operation of classifying.
The present invention relates to a set of by: automatic feeding, is provided with the computing machine of outline line fitting software or program, is provided with the computing machine of outline line length identification software or program, darkroom, light-source system, camera, and the automatic system that the device such as signal output apparatus is formed.
The device structure realized needed for function of the present invention is simple, and efficiency is high, without the need to special tooling, easy to operate.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.Wherein, being 1. light source and camera system, is 2. darkroom, is 3. the computing machine being provided with outline line fitting software or program and outline line length computation software or program, is 4. feeding device, is 5. automatic feeding.
Fig. 2 is the vertical view of Fig. 1.Wherein, being 6. the piston ring be instantly detected, is 7. the screening plant that piston ring end gap clearance is less than between process island, is 8. the screening plant that piston ring end gap clearance is greater than between process island, is 9. material-receiving device.
Embodiment
The present invention implements according to following steps:
1) piston ring is loaded well in pay-off, and instantly detected piston ring carries out the profile imaging under free state in darkroom;
2) computing machine being provided with outline line fitting software or program receives the piston ring profile information of step 1) acquisition, and triggering outline line fitting software or program carry out the matching action of the piston ring excircle configuration line under free state;
3) computing machine of outline line length identification software or program is installed to step 2) the excircle configuration information of piston ring under free state after the matching of transmitting, and go out piston ring excircle configuration line length by the computer calculate being provided with outline line length computation software or program;
4) piston ring excircle configuration line length step 3) obtained by specific program is converted into the end-gaps of piston ring, and compare between the piston ring end gap clearance after conversion and process island, comparative result is attributed to respectively: be less than between process island, is positioned between process island and is greater than three intervals between process island;
5) when the comparative result in step 4): a. is less than between process island, then instantly detected piston ring is received the material-receiving device of the piston ring be less than between process island by being automatically placed into; B. be positioned between process island, then instantly detected piston ring is received the material-receiving device of the piston ring be positioned between process island by being automatically placed into; C. be greater than between process island, then instantly detected piston ring is placed into the material-receiving device receiving and be positioned at the piston ring be greater than between process island automatically.
After above step completes, namely the automatic detection and classification that is in the end-gaps of the piston ring under free state is completed, automatic feeding will continue feeding afterwards, and carry out the automatic detection and classification that the next one is in the end-gaps of the piston ring under free state.
Claims (2)
1. the present invention relates to a kind of optical projection method that utilizes and end-gaps method for measuring is carried out to the piston ring being in free state, the method utilizes optical projection imaging technique, outline line fitting technique, outline line length computation technology, it is characterized in that: the mensuration of the orthogonal projection of the piston ring being in free state being carried out to its excircle configuration line length, and measured value is converted into piston ring end gap clearance by special algorithm, again the piston ring end gap clearance value after conversion and process value are compared, be in different interval piston ring to piston ring end gap clearance automatically identify and classify.
2. method according to claim 1, is characterized in that:
The method is implemented according to following steps:
1) piston ring is loaded well in pay-off, and instantly detected piston ring carries out the profile imaging under free state in darkroom;
2) computing machine being provided with outline line fitting software or program receives the piston ring profile information of step 1) acquisition, and triggering outline line fitting software or program carry out the matching action of the piston ring excircle configuration line under free state;
3) computing machine of outline line length identification software or program is installed to step 2) the excircle configuration information of piston ring under free state after the matching of transmitting, and go out piston ring excircle configuration line length by the computer calculate being provided with outline line length computation software or program;
4) piston ring excircle configuration line length step 3) obtained by specific program is converted into the end-gaps of piston ring, and compare between the piston ring end gap clearance after conversion and process island, comparative result is attributed to respectively: be less than between process island, is positioned between process island and is greater than three intervals between process island;
5) when the comparative result in step 4): a. is less than between process island, then instantly detected piston ring is received the material-receiving device of the piston ring be less than between process island by being automatically placed into; B. be positioned between process island, then instantly detected piston ring is received the material-receiving device of the piston ring be positioned between process island by being automatically placed into; C. be greater than between process island, then instantly detected piston ring is placed into the material-receiving device receiving and be positioned at the piston ring be greater than between process island automatically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310641298.XA CN104697456A (en) | 2013-12-04 | 2013-12-04 | Method of using optical projection method to determine end gap of piston ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310641298.XA CN104697456A (en) | 2013-12-04 | 2013-12-04 | Method of using optical projection method to determine end gap of piston ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104697456A true CN104697456A (en) | 2015-06-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310641298.XA Pending CN104697456A (en) | 2013-12-04 | 2013-12-04 | Method of using optical projection method to determine end gap of piston ring |
Country Status (1)
| Country | Link |
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| CN (1) | CN104697456A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109238071A (en) * | 2018-10-09 | 2019-01-18 | 广西玉柴机器股份有限公司 | The detection method of the keystone ring axial gap of engine |
| CN111678450A (en) * | 2020-05-09 | 2020-09-18 | 东华大学 | Visual detection method and device for precision part |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2166237Y (en) * | 1993-05-17 | 1994-05-25 | 张同玉 | Automatic detection for piston ring quality of internal combustion engine and its automatic sorting unit |
| CN2222347Y (en) * | 1994-12-23 | 1996-03-13 | 东北重型机械学院南校 | Test instrument for engine piston-ring |
| US20080252902A1 (en) * | 2004-01-26 | 2008-10-16 | Kabushiki Kaisha Riken | Method and Device for Detecting Direction of Member Having Outer Periphery Formed in Vertically Asymmetrical Shape |
| CN101464133A (en) * | 2009-01-12 | 2009-06-24 | 河南科技大学 | Detection apparatus for circumferential clearance of elastic ring |
| CN102615050A (en) * | 2012-04-16 | 2012-08-01 | 安国清 | Device and method for automatically detecting end gaps of piston rings and sorting piston rings |
-
2013
- 2013-12-04 CN CN201310641298.XA patent/CN104697456A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2166237Y (en) * | 1993-05-17 | 1994-05-25 | 张同玉 | Automatic detection for piston ring quality of internal combustion engine and its automatic sorting unit |
| CN2222347Y (en) * | 1994-12-23 | 1996-03-13 | 东北重型机械学院南校 | Test instrument for engine piston-ring |
| US20080252902A1 (en) * | 2004-01-26 | 2008-10-16 | Kabushiki Kaisha Riken | Method and Device for Detecting Direction of Member Having Outer Periphery Formed in Vertically Asymmetrical Shape |
| CN101464133A (en) * | 2009-01-12 | 2009-06-24 | 河南科技大学 | Detection apparatus for circumferential clearance of elastic ring |
| CN102615050A (en) * | 2012-04-16 | 2012-08-01 | 安国清 | Device and method for automatically detecting end gaps of piston rings and sorting piston rings |
Non-Patent Citations (1)
| Title |
|---|
| 王桂棠等: "基于机器视觉的活塞环闭口间隙自动检测", 《现代制造工程》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109238071A (en) * | 2018-10-09 | 2019-01-18 | 广西玉柴机器股份有限公司 | The detection method of the keystone ring axial gap of engine |
| CN111678450A (en) * | 2020-05-09 | 2020-09-18 | 东华大学 | Visual detection method and device for precision part |
| CN111678450B (en) * | 2020-05-09 | 2022-01-11 | 东华大学 | Visual detection method and device for precision part |
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Application publication date: 20150610 |
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