CN105149368A - Preparation method for high-strength 38CrMnAl nano-material rack - Google Patents
Preparation method for high-strength 38CrMnAl nano-material rack Download PDFInfo
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- CN105149368A CN105149368A CN201510525840.4A CN201510525840A CN105149368A CN 105149368 A CN105149368 A CN 105149368A CN 201510525840 A CN201510525840 A CN 201510525840A CN 105149368 A CN105149368 A CN 105149368A
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- tooth bar
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Abstract
The invention relates to the field of rack forming, in particular to a method and mold for preparing a high-strength 38CrMnAl nano-material rack. The method is characterized in that the high-strength 38CrMnAl nano-material rack can be prepared with low cost; and meanwhile, through an S-shaped channel and a rack bush die and two-time drawing, enough strain can be accumulated, and finally, a high-strength 38CrMnAl nano-material rack plate can be obtained. On the basis of the S-shaped channel mold, continuous drawing deformation of the rack is achieved, nanocrystallization of rack plate metal is achieved, the labor intensity of a manipulation worker is relieved, and the application range of a thin-wall rack is broadened.
Description
Technical field
The present invention relates to a kind of tooth bar molding field, especially relate to a kind of method and the mould of preparing high strength 38CrMnAl nano material tooth bar.
Background technology
Tooth bar is that machine driving commonly uses base parts and components, and application is wide, and consumption is large.At present, the tooth Profile Machining of known general tooth bar has the traditional diamond-making technique such as gear hobbing process, Gear Shaping, linear cutter, grinding tooth bar, Gear Milling, but these tooth bars operation in process is many, efficiency is low, metal loss is large, need configure a large amount of all kinds of machining tool and operator, production cost is high.At present, the production of most spur rack 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 performance of tooth bar product and the reduction of processing cost are had higher requirement, the especially raising of working (machining) efficiency.Therefore the extruding of tooth bar 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 tooth bar intensity 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 precision machine tool of high life and robot precision speed reduction device tooth bar very necessary in exploitation, the low fast development that directly affects high-end equipment manufacture of current tooth bar life-span.
Application number be 2010101887620 invention propose continuously extruded formed hollow strip straight-tooth 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 mechanical property and the processing characteristics of gear can be improved, but this invention is only for gear part, pertinent literature is not also had to report at present for rack part, simultaneously, that develops high-quality has high strength, high abrasion, secret lathe and the robot precision speed reduction device tooth bar of high life have more potential use value and development prospect.For overcome thin-walled tooth bar strength problem, obtain longer tooth bar in service life, provide a kind of S type channel die hubbing, preparation high strength 38CrMnAl nano material tooth bar.Therefore, the present invention proposes a kind of S type channel die hubbing improving tooth bar mechanics performance and used life and obtain 38CrMnAl nano material tooth bar.The invention provides a kind of 38CrMnAl nano material tooth bar preparation method of high strength.Therefore, wish that a kind of 38CrMnAl nano material tooth bar preparation method of high strength can overcome or at least alleviate the above-mentioned defect of prior art.
Summary of the invention
The object of the invention is: for overcoming the strength problem of thin-walled tooth bar, improving the service life of tooth bar, there is provided a kind of by S type channel die hubbing, high strength 38CrMnAl nano material rack-plate is obtained by drawing, then by cutting teeth batten, preparation high strength 38CrMnAl nano material tooth bar.
The method that a kind of S type channel die hubbing that the present invention proposes prepares 38CrMnAl nano material tooth bar comprises the following steps:
Step one, sheet material prepares: the sheet material by drawing is divided into two parts, and Part I is sheet material drawing end portion: this part arranges steel cable dop in port part; Part II is the main drawing part of sheet material: this part will obtain large sstrain, and tissue reaches nanometer, intensity, hardness and wearability that final acquisition is high.
Step 2, drawing prepares: after sheet material is carried out phosphatization saponification, at sheet material outer surface molybdenum bisuphide and mineral wax mixture, the steel cable dop of the Part I of ready sheet material is connected with the steel wire tow line of draw-off gear, then under rope traction, sheet material is put into S type channel die.
Step 3, drawing deformation and shaping: sheet material to be out of shape by S type channel die with the hauling speed of 5mm/s-20mm/s and to be comprehensively shaped with the drawing of tooth bar mouth contour forming by draw-off gear, last drawing deformation is repeated once after drawing, enough strains can be accumulated by twice drawing, final acquisition high strength 38CrMnAl nano material rack-plate, have the rack-plate of tooth bar by the drawing upper and lower end face that can be shaped, working (machining) efficiency is high, does not waste material.
Step 4, obtain 38CrMnAl nano material tooth bar: the 38CrMnAl nano material rack-plate obtaining longer size, because there is tooth bar rack-plate upper and lower end face, two pieces of rack-plates can be obtained along its center line Linear cut, by rack-plate Linear cut finally shaping tooth bar finished parts, this operation can realize higher tooth bar working (machining) efficiency, need not repeat mfg. moulding die because width is different, the disposable spur rack product just can produced close to net shape, decreases manufacturing procedure.
The present invention realizes the S type channel die of tooth bar 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 tooth bar, shape and the size of rack-plate cross section in drawing process do not change, the method can realize the microstructure nanometer of tooth bar, thus the high strength 38CrMnAl nano material tooth bar of excellent.S type channel die basis achieves the continuous drawing distortion of tooth bar, had both achieved the nanometer of rack-plate metal, and alleviated again the labour intensity handling workman, widened the range of application of thin-walled tooth bar.
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;
Fig. 2 is tooth bar mouth mould schematic diagram of the present invention
Fig. 3 nanometer thin parietal tooth bar process schematic diagram;
The extruded sample transmission electron microscope micrograph that Fig. 4 obtains;
Fig. 5 is the true stress and strain curve of drawing sheet coupon.
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 sheet material, 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.
Fig. 2 is 1. tooth bar mouth mould profile of tooth, 2. tooth bar mouth mould tooth tops of tooth bar mouth mould schematic diagram of the present invention, 3. rack-plate.
Detailed description of the invention
The 38CrMnAl nano material tooth bar preparation method of embodiment, a kind of high strength
Sheet material by drawing is divided into two parts, and Part I is sheet material drawing end portion: this part arranges steel cable dop in port part; Sheet material by drawing is arranged steel cable dop in port part; After sheet material is carried out phosphatization saponification, at sheet material outer surface molybdenum bisuphide and mineral wax mixture, the steel cable dop of the Part I of ready sheet material is connected with the steel wire tow line of draw-off gear, then under rope traction, sheet material is put into S type channel die.Sheet material is passed through the drawing of S type channel die with the hauling speed of 12mm/s by draw-off gear, last drawing deformation is repeated again once after drawing, then obtain there is high strength, the 38CrMnAl nano material rack-plate that there is tooth bar high rigidity, upper and lower end face, also tackle rack-plate simultaneously mutually and carry out stress relief annealing technique, two pieces of rack-plates can be obtained along its center line Linear cut, then by Linear cut rack-plate finally shaping tooth bar finished parts, the 38CrMnAl nano material tooth bar of the high strength of good mechanical performance, high rigidity and high abrasion is obtained.
Can find out that the average crystal grain tissue of tooth bar is the nano material being less than 500nm from the nanometer thin parietal tooth bar sample transmission electron microscope micrograph shown in Fig. 4.According to Hall-Pech formula, the crystallite dimension of material is less, and its external macro-mechanical property is higher.
A kind of high strength 38CrMnAl nano material tooth bar provided by the invention can adopt simple wire drawing process equipment, the material obtained has high hardness and intensity, keep good hardness and wear-resisting simultaneously, 38CrMnAl nano material tooth bar has potential using value, can be applicable to high-end lathe, aspect, industrial robot decelerator field.
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 38CrMnAl nano material tooth bar preparation method of a high strength, low cost can prepare the Thin-walled Straight tooth bar of high strength, high rigidity and high-wearing feature, it is characterized in that: provide a kind of by S mould passage and tooth bar mouth mould mould hubbing, high strength 38CrMnAl nano material rack-plate is obtained by drawing, then by cutting teeth batten, preparation high strength 38CrMnAl nano material tooth bar.
2. the 38CrMnAl 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 sheet material is connected with the steel wire tow line of draw-off gear, then under rope traction, sheet material is put into S type channel die, sheet material is passed through the drawing of S type channel die with the hauling speed of 12mm/s by draw-off gear, repeat last drawing deformation after drawing more once, then obtain there is high strength, the 38CrMnAl nano material rack-plate that there is tooth bar high rigidity, upper and lower end face.
3. the 38CrMnAl nano material gear preparation method of a kind of high strength according to claim 1, it is characterized in that: the average crystal grain tissue of the nanometer thin parietal tooth bar sample of acquisition is the nano material being less than 500nm, the acquisition of this material can adopt simple wire drawing process equipment, the material obtained has high hardness and intensity, keep good hardness and wear-resisting simultaneously, 38CrMnAl nano material tooth bar has potential using value, can be applicable to high-end lathe, aspect, industrial robot decelerator field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510525840.4A CN105149368A (en) | 2015-08-25 | 2015-08-25 | Preparation method for high-strength 38CrMnAl nano-material rack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510525840.4A CN105149368A (en) | 2015-08-25 | 2015-08-25 | Preparation method for high-strength 38CrMnAl nano-material rack |
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| CN105149368A true CN105149368A (en) | 2015-12-16 |
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| CN201510525840.4A Pending CN105149368A (en) | 2015-08-25 | 2015-08-25 | Preparation method for high-strength 38CrMnAl nano-material rack |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108213438A (en) * | 2018-03-29 | 2018-06-29 | 山东建筑大学 | A kind of titanium alloy high-strength direct rack processing method |
| CN114309099A (en) * | 2021-12-23 | 2022-04-12 | 延锋国际座椅***有限公司 | Manufacturing method of long rack |
Citations (6)
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|---|---|---|---|---|
| DE2549725A1 (en) * | 1975-11-06 | 1977-05-18 | Kabel Metallwerke Ghh | Seamless metal tube production - by combining first pass through die block with pilger rolling mill operation |
| EP1005927A2 (en) * | 1998-12-02 | 2000-06-07 | SMS Demag AG | Method and device for the threading of tubes in a drawing machine |
| US20060123870A1 (en) * | 2002-10-21 | 2006-06-15 | Werner Witte | Device and method for rehaping bar-shaped materials particularly for drawing and extruding |
| CN202045177U (en) * | 2011-05-12 | 2011-11-23 | 徐永兵 | Gear rack steel wire drawing mould |
| CN202606536U (en) * | 2012-05-25 | 2012-12-19 | 庞志军 | Equipment system for producing rack |
| 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 CN201510525840.4A patent/CN105149368A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2549725A1 (en) * | 1975-11-06 | 1977-05-18 | Kabel Metallwerke Ghh | Seamless metal tube production - by combining first pass through die block with pilger rolling mill operation |
| EP1005927A2 (en) * | 1998-12-02 | 2000-06-07 | SMS Demag AG | Method and device for the threading of tubes in a drawing machine |
| US20060123870A1 (en) * | 2002-10-21 | 2006-06-15 | Werner Witte | Device and method for rehaping bar-shaped materials particularly for drawing and extruding |
| CN202045177U (en) * | 2011-05-12 | 2011-11-23 | 徐永兵 | Gear rack steel wire drawing mould |
| CN202606536U (en) * | 2012-05-25 | 2012-12-19 | 庞志军 | Equipment system for producing rack |
| CN103639215A (en) * | 2013-12-06 | 2014-03-19 | 山东建筑大学 | Method for preparing high-strength nanocrystalline copper pipe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108213438A (en) * | 2018-03-29 | 2018-06-29 | 山东建筑大学 | A kind of titanium alloy high-strength direct rack processing method |
| CN114309099A (en) * | 2021-12-23 | 2022-04-12 | 延锋国际座椅***有限公司 | Manufacturing method of long rack |
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Application publication date: 20151216 |
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