CN105234197A - Preparation method for high-strength nano material gear - Google Patents
Preparation method for high-strength nano material gear Download PDFInfo
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- CN105234197A CN105234197A CN201510525831.5A CN201510525831A CN105234197A CN 105234197 A CN105234197 A CN 105234197A CN 201510525831 A CN201510525831 A CN 201510525831A CN 105234197 A CN105234197 A CN 105234197A
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Abstract
The invention discloses a novel preparation method for a high-strength nano material gear. The preparation method for the high-strength nano material gear is characterized in that the nano material gear is obtained through an S type channel die drawing method capable of improving the mechanical properties of the gear and prolonging the service lift of the gear; and the gear is drawn through the S type channel die twice-drawing deformation method, and the shape and size of the cross section of a gear bar are not changed in the drawing process. The method is capable of achieving the nanocrystallization of the microstructure of the gear, and thus the high-strength nano material gear with good properties is obtained. Continuous drawing deformation of the gear is achieved on the basis of an S type channel die, so that the nanocrystallization of gear bar metal is achieved, the labor intensity of operation workers is relieved, and the application range of thin-wall gears is broadened. According to the high-strength nano material gear, simple wire rod drawing machining equipment can be adopted; the obtained material has high rigidity and strength, and good hardness and abrasive resistance are maintained at the same time. Accordingly, the material of the high-strength nano material gear has potential application value and has good advantages especially in the fields of high-end machine tools, industrial robot reducers and the like.
Description
Technical field
The present invention relates to a kind of gear forming field, especially relate to a kind of high-strength nano material gear preparation method.
Background technology
At present, the production of most straight spur gear adopts traditional cutting working method mostly, but it has a lot of defect, as: stock utilization is low, and cost is high, and working (machining) efficiency is low.Along with the development of mechanical industry and intensifying of international competition, the raising of the performance of gear product and the reduction of processing cost are had higher requirement, especially the raising of working (machining) efficiency.Therefore the extruding of gear and forging and molding technology obtain and pay attention to and development.This type of processing method brings up to more than 70% by the stock utilization of original traditional handicraft processing method 40%, and the strength of gear teeth also improves 20%, and working (machining) efficiency improves about 40%, but this type of processing method all adopts single-piece production processing method, its working (machining) efficiency needs further to be promoted.Simultaneously along with the development of the high-end equipment manufacture of China, especially to have high strength, high abrasion, the secret lathe of high life and robot precision speed reduction device gear very necessary in exploitation, the low fast development that directly affects high-end equipment manufacture of current gear life.
Application number be 2010101887620 invention propose continuously extruded formed hollow strip straight spur gear pipe on horizontal extruder, then adopt the method for Linear cut that continuously extruded drip molding is cut into gear finished parts, this invention production efficiency is higher, and can improve mechanical property and the processing characteristics of gear, but have high strength, high abrasion, the secret lathe of high life and the robot precision speed reduction device gear of exploitation high-quality have more potential use value and development prospect.For overcome thin-wall gear strength problem, obtain longer gear in service life, a kind of S type channel die hubbing is provided, prepares high-strength nano material gear.Therefore, the present invention proposes a kind of S type channel die hubbing improving gear mechanics performance and used life and obtain nano material gear, the drawable material of employing is 40Cr steel alloy.
Summary of the invention
The object of the invention is: for overcoming the strength problem of thin-wall gear, improving the service life of gear, provide a kind of by S type channel die hubbing, preparation high strength 40Cr nano material gear.
The method that a kind of S type channel die hubbing that the present invention proposes prepares 40Cr nano material gear comprises the following steps:
Step one, bar prepares: the bar by drawing is divided into two parts, and Part I is bar drawing end portion: this part arranges steel cable dop in port part; Part II is the main drawing part of bar: this part will obtain large sstrain, and tissue reaches nanometer, intensity, hardness and wearability that final acquisition is high.
Step 2, drawing prepares: after bar is carried out phosphatization saponification, at bar outer surface molybdenum bisuphide and mineral wax mixture, the steel cable dop of the Part I of ready bar is connected with the steel wire tow line of draw-off gear, then under rope traction, bar is put into S type channel die.
Step 3, drawing deformation: bar is passed through the drawing of S type channel die with the hauling speed of 5mm/s-20mm/s by draw-off gear, repeat last drawing deformation after drawing once, enough strains can be accumulated by twice drawing, thus obtain high-strength nano material gear.
Step 4, obtains 40Cr nano material gear: the nano material gear stick obtaining longer size, the then final formed gear finished parts of Linear cut, this operation can realize higher Gear Processing efficiency.
The present invention realizes the S type channel die of gear drawing deformation, comprise S type passage die, first time prestressing force gland, second time prestressing force gland, and corresponding appurtenances steel cable dop and steel cable.
The invention has the beneficial effects as follows: adopt this kind of scheme, by S type channel die drawing twice deformation method drawing gear, shape and the size of 40Cr gear stick cross section in drawing process do not change, the method can realize the microstructure nanometer of gear, thus the high-strength nano material gear of excellent.S type channel die basis achieves the continuous drawing distortion of gear, had both achieved the nanometer of 40Cr gear stick metal, and alleviated again the labour intensity handling workman, widened the range of application of thin-wall gear.
accompanying drawing illustrates:
Here is described in detail specific embodiment of the invention scheme in conjunction with the accompanying drawings and embodiments.
Fig. 1 is S type channel die drawing process installation drawing of the present invention;
Figure 24 0Cr nanometer thin-wall gear process schematic diagram;
The 40Cr gear drawing rod sample transmission electron microscope micrograph that Fig. 3 obtains;
Fig. 4 is the load-deformation curve of 40Cr gear drawing rod sample.
Being labeled as in above-mentioned figure:
Fig. 1 is the 1.S type passage die of S type channel die drawing process installation drawing of the present invention, 2. extrusion bar, 3. ground floor die prestressing force lasso, 4. second layer die prestressing force lasso, 5. dop, 6. steel wire rope, 7. pre-stress die base.
Detailed description of the invention
The nano material gear preparation method of embodiment 1, a kind of high strength
Bar by drawing is divided into two parts, and Part I is bar drawing end portion: this part arranges steel cable dop in port part;
Bar by drawing is arranged steel cable dop in port part; After bar is carried out phosphatization saponification, at bar outer surface molybdenum bisuphide and mineral wax mixture, the steel cable dop of the Part I of ready bar is connected with the steel wire tow line of draw-off gear, then under rope traction, bar is put into S type channel die.Bar is passed through the drawing of S type channel die with the hauling speed of 7mm/s by draw-off gear, last drawing deformation is repeated again once after drawing, accumulation enough strain makes material grains nanometer, then high strength, high hardness nanocomposite material gear stick will be obtained, also tackle gear simultaneously mutually and carry out stress relief annealing technique, then the final formed gear finished parts of Linear cut, obtains the nano material gear of the high strength of good mechanical performance, high rigidity and high abrasion.
Can find out that the average crystal grain tissue of gear is the nano material being less than 600nm from the nano material 40Cr drawing gear stick sample transmission electron microscope micrograph shown in Fig. 3.From the nano material drawing bar sample tensile stress-strain curve shown in Fig. 4, can find out, intensity comparatively conventional specimen improves 88.5%, and according to Hall-Pech formula, the crystallite dimension of material is less, and its external macro-mechanical property is higher.
Known, the average crystal grain tissue of nano material 40Cr drawing gear stick sample is the nano material being less than 600nm, and its intensity comparatively conventional specimen improves 88.5%,
A kind of high-strength nano material gear provided by the invention can adopt simple wire drawing process equipment, and the material of acquisition has high hardness and intensity, keeps good hardness and wearability simultaneously.Therefore, material of the present invention has potential using value, has good advantage especially in the fields such as high-end lathe, industrial robot decelerator.
Die S type channel design of the present invention; all prior art can be adopted; the present invention is not limited to above-mentioned cited concrete form of implementation, and all those skilled in the art, without the getable improvement of creative work, all belong in protection scope of the present invention.
Claims (3)
1. the nano material gear preparation method of a high strength, low cost can prepare the Thin-walled Straight gear of high strength, high rigidity and high-wearing feature, it is characterized in that: after adopting s type channel die drawing bar, carry out the second passes of drawing again, the plastic deformation repeatedly of gear stick can be realized, final accumulation large deformation, namely realize the microstructure nanometer of gear, obtain again high-strength nano material 40Cr gear stick.
2. the nano material gear preparation method of a kind of high strength according to claim 1, it is characterized in that: the steel cable dop of the Part I of ready bar is connected with the steel wire tow line of draw-off gear, then under rope traction, bar is put into S type channel die, bar is passed through the drawing of S type channel die with the hauling speed of 7mm/s by draw-off gear, last drawing deformation is repeated again once after drawing, accumulation enough strain makes gear stick material grains nanometer, then the final formed gear finished parts of Linear cut, obtain the high strength of good mechanical performance, the nano material 40Cr gear of high rigidity and high abrasion.
3. the nano material gear preparation method of a kind of high strength according to claim 1, it is characterized in that: the interior microscopic even tissue of high-strength nano material 40Cr gear, crystallite dimension is less than 600 nanometers, and intensity and the hardness of the high-strength nano material gear of acquisition are high.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510525831.5A CN105234197A (en) | 2015-08-25 | 2015-08-25 | Preparation method for high-strength nano material gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510525831.5A CN105234197A (en) | 2015-08-25 | 2015-08-25 | Preparation method for high-strength nano material gear |
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| CN105234197A true CN105234197A (en) | 2016-01-13 |
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| CN201510525831.5A Pending CN105234197A (en) | 2015-08-25 | 2015-08-25 | Preparation method for high-strength nano material gear |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4545227A (en) * | 1982-06-18 | 1985-10-08 | Sumitomo Metal Industries, Ltd. | Apparatus for dry type continuous wire drawing |
| JPH0780537A (en) * | 1993-09-09 | 1995-03-28 | Nippon Steel Corp | Method for drawing metallic wire |
| JPH09164422A (en) * | 1995-12-13 | 1997-06-24 | Hitachi Cable Ltd | Method and equipment for warm wire drawing |
| CN203343196U (en) * | 2013-07-11 | 2013-12-18 | 安徽振兴拉丝模有限公司 | Wire drawing die for wrapping diamond high temperature sintering body |
| CN103639215A (en) * | 2013-12-06 | 2014-03-19 | 山东建筑大学 | Method for preparing high-strength nanocrystalline copper pipe |
-
2015
- 2015-08-25 CN CN201510525831.5A patent/CN105234197A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4545227A (en) * | 1982-06-18 | 1985-10-08 | Sumitomo Metal Industries, Ltd. | Apparatus for dry type continuous wire drawing |
| JPH0780537A (en) * | 1993-09-09 | 1995-03-28 | Nippon Steel Corp | Method for drawing metallic wire |
| JPH09164422A (en) * | 1995-12-13 | 1997-06-24 | Hitachi Cable Ltd | Method and equipment for warm wire drawing |
| CN203343196U (en) * | 2013-07-11 | 2013-12-18 | 安徽振兴拉丝模有限公司 | Wire drawing die for wrapping diamond high temperature sintering body |
| CN103639215A (en) * | 2013-12-06 | 2014-03-19 | 山东建筑大学 | Method for preparing high-strength nanocrystalline copper pipe |
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Application publication date: 20160113 |
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| RJ01 | Rejection of invention patent application after publication |