CN103406384B - Hard alloy extrusion die for involute external splines - Google Patents
Hard alloy extrusion die for involute external splines Download PDFInfo
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- CN103406384B CN103406384B CN201310297220.0A CN201310297220A CN103406384B CN 103406384 B CN103406384 B CN 103406384B CN 201310297220 A CN201310297220 A CN 201310297220A CN 103406384 B CN103406384 B CN 103406384B
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Abstract
The invention discloses a hard alloy extrusion die for involute external splines. The extrusion die comprises a hard alloy die core and a shell, wherein the shell is arranged outside the hard alloy die core and is connected with the hard alloy die core through interference fit; the spline part of the hard alloy die core comprises a spline precursor, a spline working section and spline return sections which are successively connected. The extrusion die has the advantages of low processing cost, long service life, high processing efficiency and precision and the like and can realize processing splines for the two ends of a long shaft simultaneously.
Description
Technical field
The present invention relates to a kind of mould, specifically a kind of Hard alloy extrusion die being applicable to involute outer spline on working shaft-like part.
Background technology
Involute spline is connecting mode important in machine driving, and traditional processing mode of involute splined shaft is gear hobbing process and Milling Process, and not only production efficiency is low, and spline precision is not high yet.Along with the develop rapidly of auto industry, increasing to the demand of involute splined shaft class part, required precision is also more and more higher, and traditional processing mode can not meet its production and required precision gradually.The feature that production efficiency is high, Product Precision is high although in recent years emerging gear rolling processing mode has, the price comparison of gear rolling machine and gear rolling knife is high, and it is most important to debug this link, needs professional to operate.And for a longaxones parts, when needing two ends to process the involute spline of different parameters, if only have a gear rolling machine, just cannot meet clamped one time, task that two ends spline is processed simultaneously, only after processing one end spline, again dismounting, debugging are carried out to gear rolling knife, reprocessing other end spline, not only troublesome poeration, and if spline two ends have position degree requirement, then twice clamping is very large to position tolerances.
Summary of the invention
Technical problem to be solved by this invention is to propose that a kind of processing cost is low, long service life, working (machining) efficiency and machining accuracy are high, can realize the involute outer spline Hard alloy extrusion die of major axis two ends being processed simultaneously to spline.
For solving the problems of the technologies described above, involute outer spline Hard alloy extrusion die of the present invention comprises carbide alloy core rod and housing, described housing is located at the outside of described carbide alloy core rod and is connected with described carbide alloy core rod interference fit, and the splined section of described carbide alloy core rod comprises that the spline be connected continuously is leading, spline active section and spline reverse-running section.
Above-mentioned involute outer spline Hard alloy extrusion die, it also includes cushion block, and described cushion block to be located at below described carbide alloy core rod and to be connected with described housing interference fit.
Above-mentioned involute outer spline Hard alloy extrusion die, described carbide alloy core rod and described housing adopt cold charge interference fit to be connected, and through 400 DEG C of constant temperature 4 ~ 5 hours, eliminate stress; Described cushion block and described housing adopt hot charging interference fit, to increase the bearing capacity of extrusion die, extend the mold use life-span.
Above-mentioned involute outer spline Hard alloy extrusion die, the leading employing conical entrance of described spline, enters die orifice local pier thick phenomenon with what avoid occurring when extruding spline.
Above-mentioned involute outer spline Hard alloy extrusion die, the working width of described spline active section is chosen by 0.2 and the product numerical value of processed spline length, to make metal flow in extrusion process easy, and controls frictional force in relatively little scope.
Above-mentioned involute outer spline Hard alloy extrusion die, the corner angle of described sintered carbide die in-core and transition position adopt round-corner transition, to make metal smooth flow in extrusion process.
Above-mentioned involute outer spline Hard alloy extrusion die, described spline reverse-running section presses spline form design, and with certain pattern draft, facilitates depanning to make being extruded spline.
Above-mentioned involute outer spline Hard alloy extrusion die, the space width manufacturing tolerance of described spline active section controls within 0.004mm, effectively to control the ellipse change of processed spline interrod spacing size and interrod spacing.
Above-mentioned involute outer spline Hard alloy extrusion die, the Index tolerance of described spline active section requires within 0.005mm, profile of tooth tolerance within 0.005m, teeth directional tolerance within 0.003mm, effectively to control each individual error of processed spline.
Above-mentioned involute outer spline Hard alloy extrusion die, the tooth-face roughness Ra value of described spline active section is not more than 0.1 μm, effectively to control the tooth-face roughness of processed spline.
Above-mentioned involute outer spline Hard alloy extrusion die, described carbide alloy core rod scribbles coating, to make extrusion die core rod operationally produce more low-friction coefficient, better heat-resisting quantity, higher wearability, can increase the life-span of extrusion die further.
The present invention is owing to have employed technique scheme, its adopt have that hardness is high, wear-resisting, the carbide alloy class material of intensity and a series of premium properties such as toughness is better, heat-resisting, corrosion-resistant makes core rod, the extrusion die life-span can reach more than 100,000, exceeds much than adopting the gear rolling knife life-span of high-speed steel manufacture.Be directly installed on during application on lathe and just can use, can not only realize the processing of involute outer spline on general axial workpiece, realize major axis two ends by coaxial two transmission press simultaneously and process external splines simultaneously, working (machining) efficiency is high.Because itself precision is higher, thus the precision of processed spline is also very high, ensure that the accuracy class of processed spline can be up to state standards the 5 grades of spline requirements specified in GB/T3478, and steady quality.
Accompanying drawing explanation
Fig. 1 is the structural representation of extrusion die of the present invention;
Fig. 2 is that A-A in Fig. 1 is to sectional view.
Detailed description of the invention
As shown in Figure 1, involute outer spline Hard alloy extrusion die of the present invention comprises carbide alloy core rod 1, cushion block 2 and housing 3, and carbide alloy core rod 1 carries out coating process, is the critical component of extruding spline.Corner angle in carbide alloy core rod 1 and transition position adopt round-corner transition, to make metal smooth flow in extrusion process.Housing 3 and cushion block 2 can change profile and structure (sometimes also can not establish cushion block 3 according to actual needs) according to the actual conditions of lathe.Housing 3 is located at the outside of carbide alloy core rod 1, and cushion block 2 is located at below carbide alloy core rod 1, and carbide alloy core rod 1 and housing 3 adopt cold charge interference fit to be connected, and through 400 DEG C of constant temperature 4 ~ 5 hours, eliminates stress.Cushion block 2 and housing 3 adopt hot charging interference fit.The splined section of carbide alloy core rod 1 comprises the leading 11(of spline and also namely enters die orifice), spline active section 12 and spline reverse-running section 13(be please refer to Fig. 2), spline leading 11 adopts conical entrance, the working width of spline active section 12 is chosen by 0.2 and the product numerical value of processed spline length, to make metal flow in extrusion process easy, and frictional force is controlled in relatively little scope.Within the space width manufacturing tolerance control 0.004mm of spline active section 12, Index tolerance require within 0.005mm, profile of tooth tolerance within 0.005m, teeth directional tolerance within 0.003mm, tooth-face roughness Ra value should not be greater than 0.1 μm.Spline reverse-running section 13 presses spline form design, and adopts certain pattern draft (large footpath, path, space width are all with gradient), facilitates depanning to make being extruded spline.
Claims (1)
1. involute outer spline Hard alloy extrusion die, it is characterized in that, it comprises carbide alloy core rod, cushion block and housing, described carbide alloy core rod scribbles coating, described housing is located at the outside of described carbide alloy core rod and is adopted cold charge interference fit to be connected with described carbide alloy core rod, and through 400 DEG C of constant temperature 4 ~ 5 hours; Described cushion block to be located at below described carbide alloy core rod and to be adopted hot charging interference fit to be connected with described housing; The splined section of described carbide alloy core rod comprises that the spline be connected continuously is leading, spline active section and spline reverse-running section, and the working width of described spline active section is chosen by 0.2 and the product numerical value of processed spline length; The space width manufacturing tolerance of described spline active section controls within 0.004mm, the Index tolerance of described spline active section requires within 0.005mm, profile of tooth tolerance within 0.005m, teeth directional tolerance is within 0.003mm; The tooth-face roughness Ra value of described spline active section is not more than 0.1 μm; The corner angle of described sintered carbide die in-core and transition position adopt round-corner transition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310297220.0A CN103406384B (en) | 2013-07-16 | 2013-07-16 | Hard alloy extrusion die for involute external splines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310297220.0A CN103406384B (en) | 2013-07-16 | 2013-07-16 | Hard alloy extrusion die for involute external splines |
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| CN103406384A CN103406384A (en) | 2013-11-27 |
| CN103406384B true CN103406384B (en) | 2015-07-08 |
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| CN201310297220.0A Active CN103406384B (en) | 2013-07-16 | 2013-07-16 | Hard alloy extrusion die for involute external splines |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102601151A (en) * | 2012-03-21 | 2012-07-25 | 南京工业职业技术学院 | Method for manufacturing precision combined dies by involute spline open extrusion |
| CN203380205U (en) * | 2013-07-16 | 2014-01-08 | 恒锋工具股份有限公司 | Involute spline cemented carbide extrusion die |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4407825B2 (en) * | 2005-04-28 | 2010-02-03 | トヨタ自動車株式会社 | Extrusion molding method and extrusion molding apparatus |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102601151A (en) * | 2012-03-21 | 2012-07-25 | 南京工业职业技术学院 | Method for manufacturing precision combined dies by involute spline open extrusion |
| CN203380205U (en) * | 2013-07-16 | 2014-01-08 | 恒锋工具股份有限公司 | Involute spline cemented carbide extrusion die |
Non-Patent Citations (5)
| Title |
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| 提高花键轴冷挤压模具寿命研究;冯文杰等;《现代制造工程》;20100331(第03期);97-99 * |
| 李硕本.预应力组合凹模.《冲压工艺学》.1982,204-205. * |
| 渐开线花键导轴挤压模设计;伍太宾等;《模具工业》;20060725(第07期);53-57 * |
| 过轮轴开式冷挤压工艺与模具设计;冯文杰等;《模具工业》;20070325;第33卷(第03期);50-52 * |
| 钢结硬质合金在花键轴冷挤压模具中的应用;冯文杰等;《机械设计与制造》;20071208(第12期);193-194 * |
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