CN102489758A - Lock hook processing method - Google Patents
Lock hook processing method Download PDFInfo
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- CN102489758A CN102489758A CN2011103793302A CN201110379330A CN102489758A CN 102489758 A CN102489758 A CN 102489758A CN 2011103793302 A CN2011103793302 A CN 2011103793302A CN 201110379330 A CN201110379330 A CN 201110379330A CN 102489758 A CN102489758 A CN 102489758A
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- latch hook
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Abstract
The invention provides a lock hook processing method. The lock hook processing method mainly solves the problem that a lock hook obtained by the existing lock hook processing method produces stress cracks easily and fractures because of hydrogen embrittlement. The lock hook processing method comprises the following steps of 1, preparing a rod material, 2, carrying out part shape processing, 3, carrying out part outline processing by milling, 4, carrying out heat treatment, and 5, carrying out dehydrogenation treatment. Through avoiding processes on a material center area, the lock hook processing method reduces the impurity influence on an important part characteristic part R so that the important part characteristic part R subjected to numerically-controlled bulb milling cutter processing does not produce stress cracks, and guarantees no part fracture caused by dehydrogenation because the dehydrogenation treatment is carried out after the surface treatment.
Description
Technical field
The invention belongs to a kind of machining process, be specifically related to a kind of processing method of latch hook.
Background technology
The vitals that latch hook is connected with installing rack as cabinet, its process directly influence the final performance of latch hook.Existing processing technology is turning, line cutting, heat treatment, surface treatment etc.; The latch hook that this method processes can't guarantee the key property of latch hook, and key property R particularly is because during turning processing key property R; The turning lines forms stress cracking easily; Enlarge easily and fracture in the follow-up use, what be unfavorable for connecting is safe and reliable, makes cabinet and being connected of installing rack have potential safety hazard.
Simultaneously, existing processing technology is not carried out the dehydrogenation processing to latch hook, causes latch hook to have the danger of hydrogen embrittlement like this, causes the fracture that causes because of hydrogen embrittlement in the use easily, causes connecting and loses efficacy.
Summary of the invention
The present invention provides a kind of latch hook processing method, has mainly solved the problem that latch hook that existing processing method processes forms stress cracking easily, ruptures because of hydrogen embrittlement.
Concrete technical solution of the present invention is following:
This latch hook processing method may further comprise the steps:
1] preparation bar
2] processing parts profile
According to drawing requirement bar is carried out roughing, the appearance and size of milling latch hook is avoided impurity concentration territory, bar center with key property R place during milling;
3] milled part profile
The contour feature of milled part selects cutter that the different part profile of required precision is handled respectively, guarantees the unstressed crackle in key property R place, and key property R generally is meant the connection fillet of part;
4] heat treatment
The latch hook that milling is accomplished is put into vacuum drying oven, adopt the Q-tempering technology of oil quenching and oil cooling, latch hook is carried out surface heat handle;
5] dehydrogenation is handled
Coating is carried out on the latch hook surface handle, according to dehydrogenation technology latch hook is carried out dehydrogenation after coating is accomplished and handle.
In the above step 1 preparation bar, be to select for use the high-intensity steel alloy of high-quality to carry out the preparation of bar;
In the above step 3 milled part profile, be to select rose cutter that the position of part demands of different is handled, its concrete processing parameter is following:
Rough mill arc surface, speed of mainshaft S=1400～1600RPM, feed speed F=140～160mm/min;
The finish-milling arc surface, speed of mainshaft S=1700～1900RPM, feed speed F=190～210mm/min;
Finish-milling key property R, speed of mainshaft S=400～600RPM, feed speed F=90～110mm/min;
In the above step 4 heat treatment, the oil quenching temperature is 860 ℃～880 ℃, and the oil cooling temperature is: 490～510 ℃;
During the above step 5 dehydrogenation was handled, the latch hook overlay coating was finished dealing with 4 hours in, immediately latch hook was carried out dehydrogenation and handled, and it is to adopt the dehydrogenation case to carry out that dehydrogenation is handled.
Advantage of the present invention is following:
The present invention is through avoiding the material central area; Reduce the impurity effect at part key property R place; The phenomenon of stress cracking can not appear in numerical control rose cutter processing R place, and dehydrogenation is handled and can be guaranteed the fracture that part can not cause because of dehydrogenation preferably after the surface treatment.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a process chart of the present invention.
The specific embodiment
With the bar milling is accompanying drawing 2, and the size of process drawing is effectively avoided the impurity concentration territory, bar center of bar with key property R place, avoids causing because of impurity the possibility of fracture;
Numerical control rose cutter milling key property R, according to the requirement of drawing to key property R, the rose cutter processing R that type selecting is suitable guarantees that R goes out unstressed crackle;
Dehydrogenation is handled after increasing surface treatment, handles through dehydrogenation, reduces the problem that causes fracture because of hydrogen embrittlement.
Below in conjunction with embodiment the present invention is detailed:
1) preparation bar: according to drawing requirement, select the high strength alloy steel of high-quality for use, the material composition should meet the GB requirement; General tensile strength >=the 1080Mpa that selects is like 1Cr17Ni2 or 30CrMnSi;
2) processing parts profile, according to accompanying drawing 2, the process drawing requirement is milled into the cuboid profile of part with bar, and the appearance and size of milled part is avoided impurity concentration territory, bar center;
3) milled part profile: all profiles of numerical control milling part; The contour feature of numerical control milling part, the place controls to key property, particularly parameters such as the speed of mainshaft, the amount of feeding, bite, cutter; According to the requirement of drawing to key property R; Selected suitable rose cutter processing R guarantees the smooth unstressed crackle in R place, and number mills the technological parameter of key property:
Rough mill arc surface, speed of mainshaft S=1400～1600RPM, feed speed F=140～160mm/min;
The finish-milling arc surface, speed of mainshaft S=1700～1900RPM, feed speed F=190～210mm/min;
Finish-milling key property R, speed of mainshaft S=400～600RPM, feed speed F=90～110mm/min;
4) heat treatment: through the heating of vacuum drying oven, reduce the oxidation of part, take the Q-tempering technology of oil quenching and oil cooling, guarantee the high strength of part.Heat treatment process parameter is: quench: 860 ℃～880 ℃, and oil cooling, 490～510 ℃ of tempering; Oil cooling; Can reach HRC35～41 after this step process of process is accomplished, and existing method generally only can reach HRC28～30, this step main purpose is in order to prevent the generation of oxide skin;
5) dehydrogenation is handled: carry out overlay coating and handle, handle the dehydrogenation of carrying out part by dehydrogenation technology in the back and handle, the dehydrogenation technological parameter: 190 ± 10 ℃ of dehydrogenation temperature are incubated 6～8 hours, dehydrogenation instrument: dehydrogenation case; Require: must in 4 hours, carry out dehydrogenation after 1, electroplating and handle; 2, temperature retention time is put into case by part and is reached insulation and greets calculating.
Carry out the processing of important parts latch hook with the method, reduced, guaranteed key property R through the milling of numerical control bulb because of material is mingled with the risk of breakage of bringing; Handle through dehydrogenation; Avoid part because of hydrogen embrittlement fracture, this method has guaranteed part each item important performance of latch hook effectively, guarantees safe in utilization.
Claims (5)
1. a latch hook processing method is characterized in that, may further comprise the steps:
1] preparation bar
2] processing parts profile
According to drawing requirement bar is carried out roughing, the appearance and size of milling latch hook is avoided impurity concentration territory, bar center with key property R place during milling;
3] milled part profile
The contour feature of milled part selects cutter that the different part profile of required precision is handled respectively, guarantees the unstressed crackle in key property R place;
4] heat treatment
The latch hook that milling is accomplished is put into vacuum drying oven, adopt the Q-tempering technology of oil quenching and oil cooling, latch hook is carried out surface heat handle;
5] dehydrogenation is handled
Coating is carried out on the latch hook surface handle, according to dehydrogenation technology latch hook is carried out dehydrogenation after coating is accomplished and handle.
2. latch hook processing method according to claim 1 is characterized in that: in the said step 3 milled part profile, be to select rose cutter that the position of part demands of different is handled, its concrete processing parameter is following:
Rough mill arc surface, speed of mainshaft S=1400～1600RPM, feed speed F=140～160mm/min;
The finish-milling arc surface, speed of mainshaft S=1700～1900RPM, feed speed F=190～210mm/min;
Finish-milling key property R, speed of mainshaft S=400～600RPM, feed speed F=90～110mm/min.
3. latch hook processing method according to claim 2 is characterized in that: in said step 4 heat treatment, the oil quenching temperature is 860 ℃～880 ℃, and the oil cooling temperature is: 500 ℃.
4. latch hook processing method according to claim 3 is characterized in that: during said step 5 dehydrogenation was handled, the latch hook overlay coating was finished dealing with 4 hours in, immediately latch hook was carried out dehydrogenation and handled, and it is to adopt the dehydrogenation case to carry out that dehydrogenation is handled.
5. latch hook processing method according to claim 4 is characterized in that: in the said step 1 preparation bar, be to select for use the steel alloy of tensile strength >=1080Mpa to carry out the preparation of bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110379330 CN102489758B (en) | 2011-11-24 | 2011-11-24 | Lock hook processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110379330 CN102489758B (en) | 2011-11-24 | 2011-11-24 | Lock hook processing method |
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| Publication Number | Publication Date |
|---|---|
| CN102489758A true CN102489758A (en) | 2012-06-13 |
| CN102489758B CN102489758B (en) | 2013-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110379330 Active CN102489758B (en) | 2011-11-24 | 2011-11-24 | Lock hook processing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104486920A (en) * | 2014-12-03 | 2015-04-01 | 中国航空工业集团公司第六三一研究所 | Quick release component for pin-joint latch hook |
| CN110592330A (en) * | 2019-08-30 | 2019-12-20 | 合肥江航飞机装备股份有限公司 | Processing method of 30CrMnSiA high-strength steel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0282013A2 (en) * | 1987-03-11 | 1988-09-14 | Nippon Petrochemicals Company, Limited | Novel method for refining electrical insulating oil |
| CN1439467A (en) * | 2002-10-23 | 2003-09-03 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for extruding and precisive roller forging thermal strength titanium alloy blades |
| US20100010161A1 (en) * | 2006-08-25 | 2010-01-14 | Dow Global Technologies Inc. | Production of metathesis products by high melting polymer segment interchange |
| CN102069349A (en) * | 2010-12-01 | 2011-05-25 | 褚德华 | Machining method of Kenter shackle transom |
-
2011
- 2011-11-24 CN CN 201110379330 patent/CN102489758B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0282013A2 (en) * | 1987-03-11 | 1988-09-14 | Nippon Petrochemicals Company, Limited | Novel method for refining electrical insulating oil |
| CN1439467A (en) * | 2002-10-23 | 2003-09-03 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for extruding and precisive roller forging thermal strength titanium alloy blades |
| US20100010161A1 (en) * | 2006-08-25 | 2010-01-14 | Dow Global Technologies Inc. | Production of metathesis products by high melting polymer segment interchange |
| CN102069349A (en) * | 2010-12-01 | 2011-05-25 | 褚德华 | Machining method of Kenter shackle transom |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104486920A (en) * | 2014-12-03 | 2015-04-01 | 中国航空工业集团公司第六三一研究所 | Quick release component for pin-joint latch hook |
| CN110592330A (en) * | 2019-08-30 | 2019-12-20 | 合肥江航飞机装备股份有限公司 | Processing method of 30CrMnSiA high-strength steel |
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| Publication number | Publication date |
|---|---|
| CN102489758B (en) | 2013-08-21 |
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