CN104625577A - Bolt machining technology - Google Patents
Bolt machining technology Download PDFInfo
- Publication number
- CN104625577A CN104625577A CN201310541910.6A CN201310541910A CN104625577A CN 104625577 A CN104625577 A CN 104625577A CN 201310541910 A CN201310541910 A CN 201310541910A CN 104625577 A CN104625577 A CN 104625577A
- Authority
- CN
- China
- Prior art keywords
- bolt
- tempering
- carried out
- minutes
- cold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005516 engineering process Methods 0.000 title abstract description 9
- 238000003754 machining Methods 0.000 title abstract 3
- 238000005496 tempering Methods 0.000 claims abstract description 25
- 238000010791 quenching Methods 0.000 claims abstract description 14
- 230000000171 quenching effect Effects 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 238000005096 rolling process Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 abstract description 7
- 238000005255 carburizing Methods 0.000 abstract description 4
- 238000007605 air drying Methods 0.000 abstract 1
- 238000004140 cleaning Methods 0.000 abstract 1
- 238000000137 annealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a bolt machining technology. The technology comprises the following steps of a cold heading working procedure, wherein a wire rod is cut off, and is headed into a screw blank, and a head portion, cross recess (or other head styles) thread billet diameters and rod lengths, and head lower fillets are formed; a thread rolling working procedure, wherein threads are rolled out of the cold-heading blank; heat treatment, wherein, a bolt is quenched by quenching oil at the temperature of 800 DEG C+/-10 DEG C, and two-time tempering is carried out on the quenched bolt; carburizing treatment, wherein a carburizing agent is conveyed to a tempering furnace, and carburizing treatment is carried out for 50 minutes to 120 minutes at the temperature ranging from 1100 DEG C to 1150 DEG C; and finally, cleaning and air drying are carried out, and the finished bolt is obtained. The machining technology is simple, and two-time tempering is carried out on the quenched bolt; and the qualified rate of the finished product is high.
Description
Technical field
The present invention relates to transmission device bolt field, be specifically related to a kind of bolt processing technic featuring.
Background technology
The production processes such as the bolt production method of prior art comprises dish unit, annealing, pickling, takes out line, shaping, tapping, heat treatment, surface treatment.Showing Technology for Heating Processing for the high strength nut that desired strength is high is adopt the technique such as carburizing or cyaniding+Q-tempering to process, and adopt the 850-900 DEG C of full annealing technique being incubated 10 hours, but utilize the bolt of this explained hereafter contraction percentage of area when quenching larger, deformation rate is large, low with the fit rate of nut, percent defective is sometimes more than 10%.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of bolt processing technic featuring, and processing technology is simple, to quenching or bolt carry out double tempering, make the qualified interest rate of finished product high.
For achieving the above object, technical scheme of the present invention is as follows:
A kind of bolt processing technic featuring, comprises the following steps:
Cold-heading operation: by wire rod cut off, upsetting becomes screw blank piece, formed head, cross recess (or other head dummy) thread billet dia and bar long, under head fillet;
Thread rolling operation: the blank that cold-heading is good rubs screw thread;
Heat treatment: by bolt at 800 DEG C ± 10 DEG C, quench with quenching oil, then the bolt after quenching is carried out double tempering,
Then carry out Carburization Treatment, carburizer sent in tempering furnace, Carburization Treatment 50 ~ 120min in 1100 ° of-1150 DEG C of temperature ranges,
Finally clean, air-dry, get product bolt.
In a preferred embodiment of the invention, the temperature of a described tempering is 500 ± 3 DEG C, and tempering time is 230 ~ 245 minutes; The temperature of described double tempering is 600 ± 3 DEG C, and tempering time is 180 ± 5 minutes.
By technique scheme, the invention has the beneficial effects as follows:
Processing technology of the present invention is simple, to quenching or bolt carry out double tempering, make the qualified interest rate of finished product high.
Detailed description of the invention
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, setting forth the present invention further.
A kind of bolt processing technic featuring, comprises the following steps:
Cold-heading operation: by wire rod cut off, upsetting becomes screw blank piece, formed head, cross recess (or other head dummy) thread billet dia and bar long, under head fillet;
Thread rolling operation: the blank that cold-heading is good rubs screw thread;
Heat treatment: by bolt at 800 DEG C ± 10 DEG C, quench with quenching oil, then the bolt after quenching is carried out double tempering,
Then carry out Carburization Treatment, carburizer sent in tempering furnace, Carburization Treatment 50 ~ 120min in 1100 ° of-1150 DEG C of temperature ranges,
Finally clean, air-dry, get product bolt.
In a preferred embodiment of the invention, the temperature of a described tempering is 500 ± 3 DEG C, and tempering time is 230 ~ 245 minutes; The temperature of described double tempering is 600 ± 3 DEG C, and tempering time is 180 ± 5 minutes.
By technique scheme, the invention has the beneficial effects as follows:
Processing technology of the present invention is simple, to quenching or bolt carry out double tempering, make the qualified interest rate of finished product high.
More than show and describe general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (2)
1. a bolt processing technic featuring, is characterized in that, comprises the following steps:
Cold-heading operation: by wire rod cut off, upsetting becomes screw blank piece, formed head, cross recess (or other head dummy) thread billet dia and bar long, under head fillet;
Thread rolling operation: the blank that cold-heading is good rubs screw thread;
Heat treatment: by bolt at 800 DEG C ± 10 DEG C, quench with quenching oil, then the bolt after quenching is carried out double tempering,
Then carry out Carburization Treatment, carburizer sent in tempering furnace, Carburization Treatment 50 ~ 120min in 1100 ° of-1150 DEG C of temperature ranges,
Finally clean, air-dry, get product bolt.
2. a kind of bolt processing technic featuring according to claim 1, is characterized in that: the temperature of a described tempering is 500 ± 3 DEG C, and tempering time is 230 ~ 245 minutes; The temperature of described double tempering is 600 ± 3 DEG C, and tempering time is 180 ± 5 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310541910.6A CN104625577A (en) | 2013-11-06 | 2013-11-06 | Bolt machining technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310541910.6A CN104625577A (en) | 2013-11-06 | 2013-11-06 | Bolt machining technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104625577A true CN104625577A (en) | 2015-05-20 |
Family
ID=53205055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310541910.6A Pending CN104625577A (en) | 2013-11-06 | 2013-11-06 | Bolt machining technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104625577A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104999233A (en) * | 2015-08-12 | 2015-10-28 | 深圳亚太航空技术有限公司 | Technology for processing bolt made of Nb521 material |
| CN105436363A (en) * | 2015-11-30 | 2016-03-30 | 吴伟强 | Multifunctional transmission structure of heading machine |
| CN107877092A (en) * | 2016-09-29 | 2018-04-06 | 中国航空工业标准件制造有限责任公司 | A kind of 12 jiaos of special bolts processing methods of large flange |
| CN109909690A (en) * | 2019-04-04 | 2019-06-21 | 浙江力友汽车科技有限公司 | A kind of processing technology of gearbox bolt |
| CN110281027A (en) * | 2019-06-13 | 2019-09-27 | 刘华珍 | A kind of volume production bolt intelligence production equipment |
| CN110340617A (en) * | 2019-07-13 | 2019-10-18 | 海盐县机械有限公司 | A kind of anti-corrosion and high strength hex bolts production technology |
| CN111408901A (en) * | 2020-03-26 | 2020-07-14 | 鹏驰五金制品（昆山）有限公司 | Trimming-free production process for automobile hub bolt |
| CN113500159A (en) * | 2021-07-07 | 2021-10-15 | 安徽长江紧固件有限责任公司 | Warm-heading composite forming process for high-strength fastener |
-
2013
- 2013-11-06 CN CN201310541910.6A patent/CN104625577A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104999233A (en) * | 2015-08-12 | 2015-10-28 | 深圳亚太航空技术有限公司 | Technology for processing bolt made of Nb521 material |
| CN105436363A (en) * | 2015-11-30 | 2016-03-30 | 吴伟强 | Multifunctional transmission structure of heading machine |
| CN107877092A (en) * | 2016-09-29 | 2018-04-06 | 中国航空工业标准件制造有限责任公司 | A kind of 12 jiaos of special bolts processing methods of large flange |
| CN109909690A (en) * | 2019-04-04 | 2019-06-21 | 浙江力友汽车科技有限公司 | A kind of processing technology of gearbox bolt |
| CN110281027A (en) * | 2019-06-13 | 2019-09-27 | 刘华珍 | A kind of volume production bolt intelligence production equipment |
| CN110340617A (en) * | 2019-07-13 | 2019-10-18 | 海盐县机械有限公司 | A kind of anti-corrosion and high strength hex bolts production technology |
| CN111408901A (en) * | 2020-03-26 | 2020-07-14 | 鹏驰五金制品（昆山）有限公司 | Trimming-free production process for automobile hub bolt |
| CN113500159A (en) * | 2021-07-07 | 2021-10-15 | 安徽长江紧固件有限责任公司 | Warm-heading composite forming process for high-strength fastener |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150520 |
|
| WD01 | Invention patent application deemed withdrawn after publication |