CN105642696A - Wedge-shaped variable modulus multipore-lubricating spline shaft extrusion die with surface texture - Google Patents
Wedge-shaped variable modulus multipore-lubricating spline shaft extrusion die with surface texture Download PDFInfo
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- CN105642696A CN105642696A CN201610186563.3A CN201610186563A CN105642696A CN 105642696 A CN105642696 A CN 105642696A CN 201610186563 A CN201610186563 A CN 201610186563A CN 105642696 A CN105642696 A CN 105642696A
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- extrusion die
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- surface texture
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/32—Lubrication of metal being extruded or of dies, or the like, e.g. physical state of lubricant, location where lubricant is applied
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Abstract
A wedge-shaped variable modulus multipore-lubricating spline shaft extrusion die with surface texture comprises an extrusion die and a prestress die fixing sleeve externally connected with the same, the prestress die fixing sleeve is in interference fit with the extrusion die, a seal ring is fitted to a fit position of the prestress die fixing sleeve with the extrusion die, the extrusion die includes an upper bevel segment, a middle forming segment and a wedge-shaped transition segment, tooth profile modulus of the wedge-shaped transition segment increases gradually from bottom to top, tooth thickness decreases gradually from bottom to top, tooth height decreases gradually from bottom to top, bevels of the middle forming segment and the wedge-shaped transition segment are laser nicked, and the surface texture is formed to reduce friction. Metal flow in the forming process is controlled by varying the die tooth profile modulus, so that acceptability rate of extruded spline shafts is increased.
Description
Technical field
The invention belongs to mold for extruding and forming technical field, be specifically related to a kind of Wedging modulus porous lubrication splined shaft extrusion die with surface texture.
Background technology
Spline is in Aero-Space, auto industry, the industrial departments such as petrochemical industry are widely applied, thus require that spline has higher precision and mechanical property, adopt cold-extrusion technology to shape splined shaft and can significantly improve working (machining) efficiency, and the spline hardness that shapes is higher, cold-extrusion shaping is a kind of precise plastic bulk forming technology, refer to and in the cold state metal blank is put in mould or clamp system, under powerful pressure and certain speed effect, make workpiece blank at mold cavity internal shaping, thus obtaining required size, the extrusion of mechanical property. cold extrusion processing is to control metal flow by mould, thus a large amount of transfers realizing metal volume carry out formation of parts, but current conventional extrusion die ubiquity simple in construction, stress is bigger, rub higher shortcoming, when especially extruding the profiled parts such as spline, dimensional accuracy is not high, owing to extruding force is bigger, it is higher that metal flow controls difficulty, and major part metal moves with mould not used for shaping profile of tooth, causes metal accumulation, Fold also easily occurs bottom splined shaft, has had a strong impact on the yield rate of extruding splined shaft.
Summary of the invention
For the shortcoming overcoming above-mentioned prior art, it is an object of the invention to provide a kind of Wedging modulus porous lubrication splined shaft extrusion die with surface texture, by changing the modulus of mould profile of tooth, control the metal flow in forming process, improve the yield rate of extruding splined shaft.
To achieve these goals, the technical solution used in the present invention is:
A kind of Wedging modulus porous lubrication splined shaft extrusion die with surface texture, pre-stress die fixed cover 1 including extrusion die 2 and its external connection, pre-stress die fixed cover 1 and extrusion die 2 are interference fit, pre-stress die fixed cover 1 coordinates place equipped with sealing ring 3 with extrusion die 2, extrusion die 2 is divided into upper bevel section I, middle part shaped segment II, wedge shape changeover portion III, sealing ring 3 is metallic packing, and material is fine copper.
Upper bevel section I inclination alpha of described extrusion die 2 is 45 degree, to cushion stress suffered by extrusion die 2.
The wedge shape changeover portion III profile of tooth modulus of described extrusion die 2 is gradually increased from bottom to top, and transverse tooth thickness is gradually reduced from bottom to top, and tooth depth is gradually reduced from bottom to top, and what make position bottom extrusion die 2 tooth depth position and tooth axially and radially all presents wedge shape.
Bottom the middle part shaped segment II of described extrusion die 2 and the tooth of wedge shape changeover portion III, position is relative to Forming Workpiece up-sizing, gap is retained with Forming Workpiece, to 3-5 tiny oilhole IV of position processing longitudinal arrangement bottom each tooth, the relative oil-hole location processing oil pocket of pre-stress die fixed cover 1, in the course of processing, lubricating oil is by being filled with tiny oilhole IV in pre-stress die fixed cover 1 oil pocket, oil pressure, less than 5MPa, makes extrusion die 2 lubricate more abundant.
In the middle part of described extrusion die 2, shaped segment II and each inclined-plane of wedge shape changeover portion III carry out laser scored, form surface texture to reduce frictional force.
Described extrusion die 2 bottom inlet undercut ss keeps consistent with the Leading end chamfer of machined axis and shaft parts, and is at least 30 degree.
The invention have the advantages that
One, the wedge shape changeover portion III of extrusion die 2 adopts the mode becoming modulus to shape spline, plastic force can be substantially reduced, when ensureing that the number of teeth is constant, modulus increases and means to increase the reference diameter of mould profile of tooth, diameter increases and tooth depth reduces, make the shaping of institute's workpiece in the course of processing from small to large, its axial force being subject to also is changed from small to big, thus reducing splined shaft material stacking phenomenon in the course of processing, reduce the resistance of shaping.
Two, extrusion die 2 profile of tooth adopts the mode that transverse tooth thickness increases from bottom to top, metal flow can be controlled, more metal is made in the course of processing progressively to flow filling profile of tooth to tooth top, metal accumulation phenomenon reduces, reduce the resistance of shaping, less metal accumulation avoids the Fold of forming end, improves the yield rate of splined shaft.
Three, bottom extrusion die 2 tooth, position processes tiny oilhole IV, improve lubricating condition, in forming process, metal is not fully populated with entering extrusion die 2 profile of tooth chamber, but leave certain gap, lubricating oil can pass through tiny oilhole IV and enter in extrusion die 2 die cavity so that extrusion die 2 obtains sufficient lubrication in forming process, reduces frictional resistance.
Four, extrusion die 2 surface adopts laser scored mode, forms surface texture, and rational surface texture can reduce friction. Indenture position can filling lubricating oil, formed lubricating oil film, lubricating oil film can be made can be maintained at extrusion die 2 surface in forming process in conjunction with oilhole, significantly reduce frictional force.
Five, extrusion die 2 bottom inlet chamfering keeps consistent with the Leading end chamfer of machined axis and shaft parts, and processing work Leading end chamfer can reduce the material redundancy at workpiece top, it is to avoid shape initial stage axial plastic force too high.
Accompanying drawing explanation
Fig. 1 is overview of the present invention.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is the upward view of Fig. 1.
Fig. 4 is the Section A-A sectional view of Fig. 2.
Fig. 5 is the section B-B sectional view of Fig. 2.
Fig. 6 is profile of tooth partial view.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail.
With reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, a kind of Wedging modulus porous lubrication splined shaft extrusion die with surface texture, pre-stress die fixed cover 1 including extrusion die 2 and its external connection, pre-stress die fixed cover 1 and extrusion die 2 are interference fit, the magnitude of interference is 0.25mm, pre-stress die fixed cover 1 coordinates place equipped with sealing ring 3 with extrusion die 2, and sealing ring 3 is metallic packing, and material is fine copper.
With reference to Fig. 4 and Fig. 5, described extrusion die 2 is provided with upper bevel section I, middle part shaped segment II, wedge shape changeover portion III.
With reference to Fig. 2, Fig. 3, the wedge shape changeover portion III profile of tooth modulus of described extrusion die 2 is gradually increased from bottom to top, and transverse tooth thickness is gradually reduced from bottom to top, tooth depth is gradually reduced from bottom to top, and what make position bottom extrusion die 2 tooth depth position and tooth axially and radially all presents wedge shape.
With reference to Fig. 4, Fig. 5, upper bevel section I inclination alpha of described extrusion die 2 is 45 degree, to cushion stress suffered by mould.
With reference to Fig. 4, Fig. 5 and Fig. 6, in the middle part of described extrusion die 2 bottom shaped segment II and the tooth of wedge shape changeover portion III position relative to Forming Workpiece up-sizing, gap is remained with Forming Workpiece, to 3-5 tiny oilhole IV of position processing longitudinal arrangement bottom each tooth, processing oil pocket in relatively tiny oilhole IV position on pre-stress die fixed cover 1, being filled with tiny oilhole IV in the course of processing in the lubricating oil oil pocket by pre-stress die fixed cover 1, oil pressure, less than 5MPa, makes extrusion die 2 lubricate more abundant.
Carrying out laser scored in the middle part of described extrusion die 2 on shaped segment II and each inclined-plane of wedge shape changeover portion III, form surface texture to reduce frictional force, rational surface texture can reduce friction. Indenture position can filling lubricating oil, formed lubricating oil film, lubricating oil film can be made can be maintained at die surface in forming process in conjunction with oilhole, significantly reduce frictional force.
Keep consistent with reference to Fig. 4 and Fig. 5, described extrusion die 2 bottom inlet undercut ss and the Leading end chamfer of machined axis and shaft parts, and be at least 30 degree.
The operation principle of the present invention is:
Adding man-hour workpiece blank and be placed in bottom extrusion die 2, extrusion die 2 moves to workpiece blank and makes workpiece blank be entered by bottom, and pre-stress die fixed cover 1 ensures the intensity of extrusion die 2, and the upper bevel section I of extrusion die 2 has cushioned stress suffered by mould.
The wedge shape changeover portion III of extrusion die 2 ensures when the number of teeth is constant, modulus increases and means to increase the reference diameter of extrusion die 2 profile of tooth, diameter increases and tooth depth reduction, make the shaping of workpiece in the course of processing from small to large, its axial force being subject to also is changed from small to big, thus reducing splined shaft material stacking phenomenon in the course of processing, reduce the resistance of shaping. In the middle part of extrusion die 2, the suitable up-sizing in position bottom the tooth of shaped segment II and wedge shape changeover portion III, retains certain gap with Forming Workpiece.
To the tiny oilhole IV of position processing longitudinal arrangement bottom each tooth, the course of processing is filled with in oilhole lubricating oil, make mold lubrication more abundant, wedge shape changeover portion III adopts the mode that transverse tooth thickness increases from bottom to top, it is possible to control metal flow, makes in the course of processing more metal progressively to tooth top flowing filling profile of tooth, metal accumulation phenomenon reduces, reducing the resistance of shaping, less metal accumulation avoids the Fold of forming end, improves the yield rate of splined shaft.
Extrusion die 2 surface adopts laser scored mode, form surface texture, rational surface texture can reduce friction, indenture position can filling lubricating oil, form lubricating oil film, lubricating oil film can be made can be maintained at extrusion die 2 surface in forming process in conjunction with oilhole, significantly reduce frictional force.
Claims (6)
1. a Wedging modulus porous lubrication splined shaft extrusion die with surface texture, pre-stress die fixed cover (1) including extrusion die (2) and its external connection, it is characterized in that: pre-stress die fixed cover (1) and extrusion die (2) are interference fit, pre-stress die fixed cover (1) coordinates place equipped with sealing ring (3) with extrusion die (2), extrusion die (2) is divided into upper bevel section (I), middle part shaped segment (II), wedge shape changeover portion (III), sealing ring (3) is metallic packing, material is fine copper.
2. a kind of Wedging modulus porous lubrication splined shaft extrusion die with surface texture according to claim 1, it is characterized in that: upper bevel section (I) inclination alpha of described extrusion die (2) is 45 degree, to cushion stress suffered by extrusion die (2).
3. a kind of Wedging modulus porous lubrication splined shaft extrusion die with surface texture according to claim 1, it is characterized in that: wedge shape changeover portion (III) the profile of tooth modulus of described extrusion die (2) is gradually increased from bottom to top, transverse tooth thickness is gradually reduced from bottom to top, tooth depth is gradually reduced from bottom to top, and what make position bottom extrusion die (2) tooth depth position and tooth axially and radially all presents wedge shape.
4. a kind of Wedging modulus porous lubrication splined shaft extrusion die with surface texture according to claim 1, it is characterized in that: bottom the middle part shaped segment (II) of described extrusion die (2) and the tooth of wedge shape changeover portion (III), position is relative to Forming Workpiece up-sizing, gap is retained with Forming Workpiece, to 3-5 tiny oilhole (IV) of position processing longitudinal arrangement bottom each tooth, pre-stress die fixed cover (1) is oil-hole location processing oil pocket relatively, in the course of processing, lubricating oil is by being filled with tiny oilhole (IV) in pre-stress die fixed cover (1) oil pocket, oil pressure is less than 5MPa, make extrusion die (2) lubrication more abundant.
5. a kind of Wedging modulus porous lubrication splined shaft extrusion die with surface texture according to claim 1, it is characterized in that: described extrusion die (2) middle part shaped segment (II) and wedge shape changeover portion (III) each inclined-plane carry out laser scored, form surface texture to reduce frictional force.
6. a kind of Wedging modulus porous lubrication splined shaft extrusion die with surface texture according to claim 1, it is characterized in that: described extrusion die (2) bottom inlet undercut ss keeps consistent with the Leading end chamfer of machined axis and shaft parts, and is at least 30 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610186563.3A CN105642696B (en) | 2016-03-29 | 2016-03-29 | A kind of wedge shape with Surface Texture becomes the porous lubrication splined shaft extrusion die of modulus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610186563.3A CN105642696B (en) | 2016-03-29 | 2016-03-29 | A kind of wedge shape with Surface Texture becomes the porous lubrication splined shaft extrusion die of modulus |
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| CN105642696A true CN105642696A (en) | 2016-06-08 |
| CN105642696B CN105642696B (en) | 2017-12-26 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108311548A (en) * | 2018-01-25 | 2018-07-24 | 重庆市天宇电线电缆制造有限公司 | A kind of copper wire wire-drawing equipment |
| CN109513762A (en) * | 2018-11-27 | 2019-03-26 | 清华大学 | It is a kind of for producing the method and die device of wide cut magnesium plate |
| CN109877177A (en) * | 2019-03-14 | 2019-06-14 | 西安交通大学 | A kind of splined shaft squeezes composable mold and spline production method of shaft |
Citations (7)
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|---|---|---|---|---|
| JPH07185647A (en) * | 1993-12-28 | 1995-07-25 | Showa Alum Corp | Extruding tool |
| CN1367051A (en) * | 2001-02-15 | 2002-09-04 | 华北工学院 | Gear precision plastic forming process and its forming mould |
| US20040055352A1 (en) * | 2002-08-13 | 2004-03-25 | Nexans | Method of continuous production of metal wires |
| CN101722205A (en) * | 2009-12-09 | 2010-06-09 | 九川(浙江)科技股份有限公司 | Extruding mould |
| CN102218647A (en) * | 2011-06-03 | 2011-10-19 | 江苏大学 | Texturing and self-lubricating treatment method for metal plastic forming die |
| CN203380205U (en) * | 2013-07-16 | 2014-01-08 | 恒锋工具股份有限公司 | Involute spline cemented carbide extrusion die |
| CN105215071A (en) * | 2015-11-17 | 2016-01-06 | 中国科学院长春应用化学研究所 | A kind of extrusion die with lubricating system |
-
2016
- 2016-03-29 CN CN201610186563.3A patent/CN105642696B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07185647A (en) * | 1993-12-28 | 1995-07-25 | Showa Alum Corp | Extruding tool |
| CN1367051A (en) * | 2001-02-15 | 2002-09-04 | 华北工学院 | Gear precision plastic forming process and its forming mould |
| US20040055352A1 (en) * | 2002-08-13 | 2004-03-25 | Nexans | Method of continuous production of metal wires |
| CN101722205A (en) * | 2009-12-09 | 2010-06-09 | 九川(浙江)科技股份有限公司 | Extruding mould |
| CN102218647A (en) * | 2011-06-03 | 2011-10-19 | 江苏大学 | Texturing and self-lubricating treatment method for metal plastic forming die |
| CN203380205U (en) * | 2013-07-16 | 2014-01-08 | 恒锋工具股份有限公司 | Involute spline cemented carbide extrusion die |
| CN105215071A (en) * | 2015-11-17 | 2016-01-06 | 中国科学院长春应用化学研究所 | A kind of extrusion die with lubricating system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108311548A (en) * | 2018-01-25 | 2018-07-24 | 重庆市天宇电线电缆制造有限公司 | A kind of copper wire wire-drawing equipment |
| CN109513762A (en) * | 2018-11-27 | 2019-03-26 | 清华大学 | It is a kind of for producing the method and die device of wide cut magnesium plate |
| CN109877177A (en) * | 2019-03-14 | 2019-06-14 | 西安交通大学 | A kind of splined shaft squeezes composable mold and spline production method of shaft |
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| CN105642696B (en) | 2017-12-26 |
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