CN202006226U - Self-heating extruding forming die for magnesium alloy bars - Google Patents
Self-heating extruding forming die for magnesium alloy bars Download PDFInfo
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- CN202006226U CN202006226U CN2010206612850U CN201020661285U CN202006226U CN 202006226 U CN202006226 U CN 202006226U CN 2010206612850 U CN2010206612850 U CN 2010206612850U CN 201020661285 U CN201020661285 U CN 201020661285U CN 202006226 U CN202006226 U CN 202006226U
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- magnesium alloy
- counterdie
- die
- die shoe
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Abstract
The utility model relates to a self-heating extruding forming die for magnesium alloy bars. A conventional extruder cannot well adapt to the machining of magnesium alloy bars with small diameters, and has the defects of large extruding force, complex die size and structure, too many operation procedures, long production period and die replacement difficulty. The self-heating extruding forming die comprises a lower die holder (7) and an upper die holder (3), wherein the lower die holder is connected with a lower die (9); the lower die holder is connected with a group of guide posts (10); the guide posts and the lower die holder are in interference fit; the upper die holder is connected with an upper die (2), a pressure head (14) and a group of guide sleeves (12); the upper die and the upper die holder are in interference fit; the upper die forms a clearance fit with the pressure head; the upper die and the guide sleeves are in interference fit; and the upper die and the lower die are positioned through a conical surface. The utility model is used for the self-heating extruding forming of magnesium alloy bars.
Description
Technical field
The utility model relates to a kind of magnesium alloy rod from adding hot extrusion shaping mold
Background technology
Magnesium alloy is the lightest metal in practical metal, have high strength, high rigidity, conductivity of heat, electromagnetic wave shielding performance, machining property, anti-pitting and creep-resistant property are good, have important use in fields such as automobile, electronics, electrical equipment, traffic, space flight, aviation and national defense and military industry and are worth and wide application prospect.But as a kind of brand-new material, the existing behaviour in service of magnesium is far from giving full play to its potential advantages, and the development of magnesium alloy aspect practical application in industry is far away from aluminium alloy and steel and iron industry.Have only 3 how much slip systems when magnesium alloy is out of shape, wherein independent slip system has only 2, so the temperature-room type plasticity of magnesium alloy is lower, i.e. its cold deformation is limited.Casting process technologies such as die casting, semi-solid-state shaping and thixotropic forming are mainly adopted in Mg alloy formed processing on the engineering at present, to have more than 90% be foundry goods to magnesium-alloy material in the worldwide, but cast magnesium alloy exists that crystal grain is thick, mechanical property is relatively poor, easily produce shortcoming such as defective.With magnesium alloy ingot by forging, extruding and Technology of Plastic Processing such as rolling can improve effectively magnesium alloy microstructure, eliminate casting flaw, improve the mechanical property of material.
Hot extrusion processing is with the difference of other processing methods, distortion is carried out in approximate airtight instrument, material bears very high hydrostatic pressure in deformation process, help eliminating defectives such as slag inclusion in the ingot casting, pore, the loose and tail that contracts, improve the formability of material, make material in once-forming, can bear bigger deflection, thereby the structure property of product is improved.Be beneficial to the plasticity of bringing into play metal to greatest extent so hot extrusion is processed with, production is flexible, technological operation is simple, and the hot extrusion product size is accurate, surface quality is high.Usually the extruding of magnesium alloy is to carry out on large-size extruder or forcing press, and need heating and temperature regulating device, relatively be suitable for being applied on the large scale extruded product, but existing extruder can not well adapt to the processing of the less magnesium alloy rod of diameter, extruding force is bigger than normal, die size and structure relative complex, operational sequence are more, production cycle is long, more the mold exchange difficulty.
Summary of the invention
The purpose of this utility model is that the problem at above-mentioned existence provides a kind of magnesium alloy rod from adding hot extrusion shaping mold, by simple die change and heating certainly, can process the less magnesium alloy rod of diameter of different size.
Above-mentioned purpose realizes by following technical scheme:
Magnesium alloy rod is from adding hot extrusion shaping mold, its composition comprises: die shoe, upper bolster, described die shoe connects counterdie, described die shoe connects one group of guide pillar, described guide pillar and described die shoe interference fit, described upper bolster connects patrix, pressure head and one group of guide pin bushing respectively, described patrix and described upper bolster interference fit, described patrix and described pressure head matched in clearance, described patrix and described guide pin bushing interference fit are located by the conical surface between described patrix and the described counterdie.
Described magnesium alloy rod is from adding hot extrusion shaping mold, is connected one group of bolt between described die shoe and the described upper bolster, is with spring and sleeve on the described bolt.
Described magnesium alloy rod is from adding hot extrusion shaping mold, described patrix and described counterdie outer wall are provided with muff, described muff and described patrix are provided with the thermometer hole that does not pass the patrix inwall of perforation, and described patrix, described counterdie and described pressure head have bottoming hole respectively.
Described magnesium alloy rod is from adding hot extrusion shaping mold, and the mould coning angle of going into of described counterdie is 60 °, and it is the round-corner transition of 2 ~ 3mm that radius is adopted in the porch of described counterdie.
Beneficial effect:
1, adopt the utility model can process the magnesium alloy rod that diameter d is Ф 4 ~ 30mm smoothly, production cost is low, the stock utilization height, and blank deformation is even, and extruding force is little, product size precision height, surface quality is good.
, the utility model is simple in structure, saves traditional recipient structure, more mold exchange is convenient, and is with low cost, long service life.
, the utility model upper die and lower die and pressure head be respectively arranged with bottoming hole, heating rod is inserted in the inside, and mould is carried out having saved extra heater, and having avoided the thermal loss in the installation process from heating.And on the outer wall of patrix, be arranged with the spun-glass insulation cover, prevent that the cooling of extrusion process mould is too fast.In order to grasp the actual temperature of extrusion process mould, muff and patrix are provided with the thermometer hole near the patrix inwall of perforation, insert temperature measuring equipment (as the portable thermoelectric idol) variations in temperature of Measurement die in real time in the thermometer hole.
, be respectively equipped with 4 guide pin bushings and guide pillar on upper bolster and the die shoe, also be provided with 4 bolts, be with spring on the bolt, utilize the elastic reaction of spring, upper bolster takes up mould, is convenient to change counterdie.
, in order to be beneficial to metal flow, reduce extruding force, improve die life, the mould conicity angles alpha of going into of counterdie adopts 60 °, it is the round-corner transition of 2mm that radius is adopted in the counterdie porch, the calibrating strap length l is selected 6mm, cavity dimension d is 4 ~ 30mm.
Description of drawings:
Accompanying drawing 1 is a vertical view of the present utility model.
Accompanying drawing 2 is A-A profiles of accompanying drawing 1.
Accompanying drawing 3 is front views of counterdie, and α is for going into the mould taper angle among the figure, and d is a cavity dimension.
Accompanying drawing 4 is vertical views of counterdie.
The specific embodiment:
Embodiment 1:
Magnesium alloy rod is from adding hot extrusion shaping mold, its composition comprises: die shoe 7, upper bolster 3, described die shoe connects counterdie 9, described die shoe connects one group of guide pillar 10, described guide pillar and described die shoe interference fit, described upper bolster connects patrix 2, pressure head 14 and one group of guide pin bushing 12 respectively, described patrix and described upper bolster interference fit, described patrix and described pressure head matched in clearance, described patrix and described guide pin bushing interference fit are located by the conical surface between described patrix and the described counterdie.
Embodiment 2:
Above-mentioned magnesium alloy rod is from adding hot extrusion shaping mold, is connected one group of bolt 1 between described die shoe and the described upper bolster, is with spring 4 and sleeve 6 on the described bolt.
Embodiment 3:
Above-mentioned magnesium alloy rod is from adding hot extrusion shaping mold, described patrix and described counterdie outer wall are provided with muff 13, described muff and described patrix are provided with the thermometer hole that does not pass the patrix inwall 11 of perforation, and described patrix, described counterdie and described pressure head have bottoming hole 5 respectively.
Embodiment 4:
Above-mentioned magnesium alloy rod is from adding hot extrusion shaping mold, and the mould coning angle of going into of described counterdie is 60 °, and it is the round-corner transition of 2 ~ 3mm that radius is adopted in the porch of described counterdie.
The utility model according to press tonnage, goods specification, definite patrix work inside diameter D such as the extrusion ratio scope that allows and outer diameter D 1 meet D1/D=2.0 ~ 2.2.
On patrix 2 outer walls, be arranged with spun-glass insulation cover 13, prevent that the cooling of extrusion process mould is too fast.In order to grasp the actual temperature of extrusion process mould, muff 13 and patrix 2 are provided with the thermometer hole 11 near the patrix inwall of perforation, insert temperature measuring equipment (as the portable thermoelectric idol) variations in temperature of Measurement die in real time in the thermometer hole.
The utility model counterdie 9 adopts overall structure, sees Fig. 3.In order to be beneficial to metal flow, reduce extruding force, improve die life, the mould conicity angles alpha of going into of counterdie adopts 60 °, and it is the round-corner transition of 2mm that radius is adopted in the counterdie porch, and the calibrating strap length l is selected 6mm, and cavity dimension d is 4 ~ 30mm.In order to reduce frictional resistance, die cavity lower guide discharge orifice 15 suitably amplifies 2 ~ 4mm.
The mould that the utility model provides can use on common vertical hydraulic press.After extruding is finished, loose bolts 1, backhaul forcing press this moment, the elastic reaction that utilizes spring 4 unloads counterdie 9 with pressure head 14, patrix 2 and upper bolster 3 certain altitude (height of conical surface on the counterdie 9 gets final product) of upspringing.According to the specification requirement of extruding rod,, can push the bar of plurality of specifications easily by simple replacing counterdie.
Pressure head described in the utility model, upper die and lower die adopt 3Cr2W8V die steel material commonly used manufacturing, through oil quenching and repeatedly temper number reach 58 ~ 60HRC.In order to reduce the cost of mould, upper bolster and die shoe etc. partly adopts common 45 steels to make.
Below provide the specific embodiment of preparation.
Embodiment (present embodiment is the magnesium alloy rod of 20mm for the extruding diameter)
Present embodiment mould therefor structure as shown in Figure 1, patrix 2 internal diameters are 40mm, counterdie 9 die cavity diameters are 20mm, mould extrusion process is as follows:
(1) adopting machined that magnesium alloy blank car is become diameter is 39.9 cylinder, and outer surface is evenly applied lubricant; Patrix 2 and the clean back of counterdie 9 inner wall cleanings are evenly applied lubricant; The clean back of pressure head 14 removing surfaces is evenly applied lubricant.
(2) patrix 2 is pressed on the upper bolster 3 by interference fit, and patrix 2 and counterdie 9 be by conical surface location, and blank 8 is packed in the patrix 2, and pressure head 14 presses blank, and is with bolt 1 that mould is fastening.
(3) mould is placed on the vertical hydraulic machine worktable.Heating rod 5 is installed in pressure head 14, patrix 2 and the counterdie 9, gives mould and blank heating, be heated to predetermined temperature and start hydraulic press afterwards, begin extruding by temperature controller.
(4) draw extruding rod, loose bolts 1, forcing press backhaul, the elastic reaction that utilizes spring 4 this moment is with pressure head 14, patrix 2 and upper bolster 3 certain altitude (height of conical surface on the counterdie 9 gets final product) of upspringing, unload counterdie 9, the cleaning mould, the counterdie of changing different extrusion ratios is for future use.
Extruding force is very little in the present embodiment extrusion process, and maximum extrusion pressure has only 200KN.The magnesium alloy rod smooth surface that obtains.
Claims (5)
1. magnesium alloy rod is from adding hot extrusion shaping mold, its composition comprises: die shoe, upper bolster, it is characterized in that: described die shoe connects die shoe, described die shoe connects one group of guide pillar, described guide pillar and described die shoe interference fit, described upper bolster connects patrix, pressure head and one group of guide pin bushing respectively, described patrix and described upper bolster interference fit, described patrix and described pressure head matched in clearance, described patrix and described guide pin bushing interference fit are located by the conical surface between described patrix and the described counterdie.
2. magnesium alloy rod according to claim 1 is from adding hot extrusion shaping mold, and it is characterized in that: described die shoe is connected with described upper bolster: connect by one group of bolt, be with spring and sleeve on the described bolt.
3.. magnesium alloy rod according to claim 1 and 2 is from adding hot extrusion shaping mold, it is characterized in that: described patrix and described counterdie outer wall are provided with muff, described muff and described patrix are provided with the thermometer hole that does not pass the patrix inwall of perforation, and described patrix, described counterdie and described pressure head have bottoming hole respectively.
4.. magnesium alloy rod according to claim 1 and 2 is from adding hot extrusion shaping mold, it is characterized in that: the mould coning angle of going into of described counterdie is 60 °, and it is the round-corner transition of 2 ~ 3mm that radius is adopted in the porch of described counterdie.
5.. magnesium alloy rod according to claim 3 is from adding hot extrusion shaping mold, it is characterized in that: the mould coning angle of going into of described counterdie is 60 °, and it is the round-corner transition of 2 ~ 3mm that radius is adopted in the porch of described counterdie.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206612850U CN202006226U (en) | 2010-12-15 | 2010-12-15 | Self-heating extruding forming die for magnesium alloy bars |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206612850U CN202006226U (en) | 2010-12-15 | 2010-12-15 | Self-heating extruding forming die for magnesium alloy bars |
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| Publication Number | Publication Date |
|---|---|
| CN202006226U true CN202006226U (en) | 2011-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206612850U Expired - Fee Related CN202006226U (en) | 2010-12-15 | 2010-12-15 | Self-heating extruding forming die for magnesium alloy bars |
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| CN (1) | CN202006226U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103331582A (en) * | 2013-07-04 | 2013-10-02 | 扬州大学 | Method for preparing metal thin-wall microtubes |
| CN105983639A (en) * | 2015-01-27 | 2016-10-05 | 王家宣 | Integral light alloy rim isothermal forging die |
| CN106064181A (en) * | 2016-06-22 | 2016-11-02 | 重庆大学 | The accumulation pressurizing unit of a kind of sheet material severe plastic deformation and using method thereof |
| CN107597870A (en) * | 2017-10-18 | 2018-01-19 | 山东大学 | A kind of die device and method for being used to study Splicing Mechanism soldering process |
-
2010
- 2010-12-15 CN CN2010206612850U patent/CN202006226U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103331582A (en) * | 2013-07-04 | 2013-10-02 | 扬州大学 | Method for preparing metal thin-wall microtubes |
| CN103331582B (en) * | 2013-07-04 | 2015-11-25 | 扬州大学 | A kind of method preparing metal thin-wall microtubule |
| CN105983639A (en) * | 2015-01-27 | 2016-10-05 | 王家宣 | Integral light alloy rim isothermal forging die |
| CN106064181A (en) * | 2016-06-22 | 2016-11-02 | 重庆大学 | The accumulation pressurizing unit of a kind of sheet material severe plastic deformation and using method thereof |
| CN106064181B (en) * | 2016-06-22 | 2018-07-31 | 重庆大学 | A kind of the accumulation pressurizing unit and its application method of plank severe plastic deformation |
| CN107597870A (en) * | 2017-10-18 | 2018-01-19 | 山东大学 | A kind of die device and method for being used to study Splicing Mechanism soldering process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111012 Termination date: 20111215 |