CN101722401A - Process for manufacturing magnesium alloy wheel and process for manufacturing wheel rim of magnesium alloy wheel - Google Patents
Process for manufacturing magnesium alloy wheel and process for manufacturing wheel rim of magnesium alloy wheel Download PDFInfo
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- CN101722401A CN101722401A CN200810201524A CN200810201524A CN101722401A CN 101722401 A CN101722401 A CN 101722401A CN 200810201524 A CN200810201524 A CN 200810201524A CN 200810201524 A CN200810201524 A CN 200810201524A CN 101722401 A CN101722401 A CN 101722401A
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Abstract
The invention relates to a process for manufacturing a magnesium alloy wheel and a process for manufacturing a wheel rim of the magnesium alloy wheel, which comprises: a step of hot extrusion, namely making a sectional material into a more than half ellipse shaped wheel rim semi-finished product in a longitudinal forming device through hot bending; a step of fully rounding, namely rolling the elliptic wheel rim semi-finished product into a full round shape by a rolling circle device, performing further pressurization and rounding on the full-circle wheel rim semi-finished product by a pressure device after performing a preparation process of welding, and finally performing the welding; and a step of air hole processing, namely processing air holes for setting inflating valves. The process for manufacturing the magnesium alloy wheel is further characterized by comprising: a step of plate blanking, namely manufacturing a circular plate and forming a center hole on the circular plate through hot stamping; a step of hot stretch forming, namely performing hot stretch on the circular plate for scheduled times; a step of hot stamping, namely forming a connecting structure and a heat sinking structure on the wheel rim semi-finished product through the hot stamping; and a step of performing a process of gang welding, namely assembling the wheel rim and a wheel spoke into a wheel.
Description
Technical field
The present invention relates to a kind of manufacturing process of automotive wheel and the manufacturing process of wheel rim thereof.
Background technology
At present, occupied the leading position in wheel market with the almag wheel of pressure casting method production.Because deformed magnesium alloy material is difficult for punching press at normal temperatures, and very easily embrittlement, so seldom be applied to wheel production.But the wrought magnesium alloy product that goes out through explained hereafter such as hot extrusion or hot-stretch has higher intensity, and better ductility has the premium properties that the cast magnesium alloy wheel can't replace.With the wheel that extruding and drawing process are produced, its mechanical property wants high a lot of than what casting die was produced, and any surface finish, need not more to economize with material through polishing, weight is lighter again, through surface treatment, will make it have good corrosion resistance, wearability, chemical resistance and hear resistance.If can realize deformed magnesium alloy material is used to make automotive wheel, this will be the great technological innovation that automotive wheel is made the field, and magnesium alloy vehicle wheel is because aforementioned good performance will obtain vast market prospect.
Summary of the invention
The object of the present invention is to provide the wheel rim manufacturing process and the magnesium alloy vehicle wheel manufacturing process of magnesium alloy vehicle wheel.
For realizing described purpose, magnesium alloy vehicle wheel manufacturing process of the present invention is characterized in, comprises wheel rim manufacturing process, spoke manufacturing process and assembled welding process; Described wheel rim manufacturing process comprises hot extrusion step, full circle step and processing pore step; In the hot extrusion step, will be hot extruded into the section bar of predetermined cross-section according to the magnesium alloy bar that fixed length cutting becomes, again this section bar hot bending in vertical shaped device is become the wheel rim semi-finished product of more than half elliptical shape; In the full circle step, at first utilize circle rolling device that the wheel rim semi-finished product heat of ovalize is rolled into wholecircle, the preparatory technology that these wheel rim semi-finished product of wholecircle are welded again, and then utilize pressue device to these wheel rim semi-finished product of wholecircle full circle that further pressurizes, at last the half-finished joint of this wheel rim is welded; In processing pore step, process the pore that is used to be provided with valve cock; Described spoke manufacturing process comprises sheet material blanking step, hot-stretch forming step and drop stamping step; In sheet material blanking step, drop stamping goes out the centre bore on circular sheet material and the circular sheet material; In the hot-stretch forming step, the hot-stretch of circular sheet material being carried out pre-determined number according to the spoke shape is to produce the spoke semi-finished product; In the drop stamping step, drop stamping goes out the structure of a plurality of connection usefulness and the structure of heat transmission on the spoke semi-finished product; In described assembled welding process, to be press fit into the wheel rim that processes according to described wheel rim manufacturing process according to the spoke that described spoke manufacturing process processes, and the connecting section of this spoke and this wheel rim welded, eliminate the heat treatment of welding interior stress then, and whole wheel surface is carried out surface treatment.
Described magnesium alloy vehicle wheel manufacturing process, its further characteristics are that in the hot extrusion step, the technological temperature of hot extrusion is between 430 ℃-500 ℃.
Described magnesium alloy vehicle wheel manufacturing process, its further characteristics are, in the full circle step, the technological temperature that the wheel rim semi-finished product heat of ovalize is rolled into wholecircle further heats the technological temperature of full circle between 250 ℃-350 ℃ to these wheel rim semi-finished product of wholecircle between 150 ℃-200 ℃.
Described magnesium alloy vehicle wheel manufacturing process, its further characteristics are that in sheet material blanking step, the technological temperature of drop stamping is between 280 ℃-350 ℃.
Described magnesium alloy vehicle wheel manufacturing process, its further characteristics be, in the hot-stretch forming step, the technological temperature of hot-stretch is between 280 ℃-350 ℃, and in the drop stamping step, the technological temperature of drop stamping is also between 280 ℃-350 ℃.
The wheel rim manufacturing process of magnesium alloy vehicle wheel of the present invention is characterized in, comprises hot extrusion step, full circle step and processing pore step; Wherein, in the hot extrusion step, will be hot extruded into the section bar of predetermined cross-section, again this section bar hot bending in vertical shaped device be become the wheel rim semi-finished product of more than half elliptical shape according to the magnesium alloy bar that fixed length cutting becomes; In the full circle step, at first utilize circle rolling device that the wheel rim semi-finished product heat of ovalize is rolled into wholecircle, the preparatory technology that these wheel rim semi-finished product of wholecircle are welded again, and then utilize pressue device to these wheel rim semi-finished product of wholecircle full circle that further pressurizes, at last the half-finished joint of this wheel rim is welded; In processing pore step, process the pore that is used to be provided with valve cock.
Described wheel rim manufacturing process, its further characteristics are that in the hot extrusion step, the technological temperature of hot extrusion is between 430 ℃-500 ℃.
Described wheel rim manufacturing process, its further characteristics are, in the full circle step, the technological temperature that the wheel rim semi-finished product heat of ovalize is rolled into wholecircle further heats the technological temperature of full circle between 250 ℃-350 ℃ to these wheel rim semi-finished product of wholecircle between 150 ℃-200 ℃.
The invention has the beneficial effects as follows: magnesium alloy materials density is little, in light weight, be used on the automobile and can reduce fuel consumption indirectly, magnesium alloy is higher than aluminium alloy and steel with regard to specific strength, near aluminium alloy and steel, magnesium alloy has good damped coefficient with regard to specific stiffness, and the vibration damping amount is greater than aluminium alloy, but magnesium alloy is difficult for punching press at normal temperatures, and very easily embrittlement; Magnesium alloy vehicle wheel manufacturing process of the present invention, adopting the magnesium alloy bar is raw material, and utilizes thermo forming technologies such as hot extrusion, hot full circle, drop stamping, hot-stretch to produce magnesium alloy spoke and magnesium alloy wheel rim, has realized magnesium alloy vehicle wheel; Section bar after wheel rim manufacturing process of the present invention will be pushed after hot extrusion is the cross section forming processes to the magnesium alloy bar immediately carries out vertical forming processes, also promptly push and bend the circle carry out continuously synchronously, make the two ends of section bar also be curved set circle like this, having overcome section bar in the past can only be rolled into circular defective at mid portion; In addition, new technology provided by the invention is with respect to similar extrusion process, available general common apparatus, universal mold (setting up heater), handling safety be convenient, be easy to continuous productive process, yield rate height, power-saving, advantage such as materials are few, and be suitable for the many variety production of small lot, be a kind of new technology that under the condition of proof strength, rigidity, alleviates wheel weight to greatest extent.
Description of drawings
Fig. 1 has shown the wheel that wheel wright's skill according to the present invention produces, and wherein a is the front view of this wheel, and b is the vertical view of this wheel, and c is that the axle of this wheel is surveyed view.
Fig. 2 has shown the process according to wheel rim manufacturing process of the present invention, wherein a has shown the magnesium alloy bar after the cutting, b has shown the semi-finished product after the hot extrusion, c has shown the product after round as a ball, d has shown and has trimmed weld bond, the wheel rim of mill behind the leg, e has shown the wheel rim behind the hot full circle, and f has shown the wheel rim after the welding.
Fig. 3 to Figure 10 has shown the manufacture process of spoke in wheel wright's skill of the present invention, wherein:
The a of Fig. 3 is the front view of punching sheet material, and b is the vertical view of punching sheet material;
The a of Fig. 4 is the front view after the sheet material hot-drawn for the first time moulding, and b is the half sectional view after the sheet material hot-drawn for the first time moulding;
The a of Fig. 5 is the front view after the sheet material hot-drawn for the second time moulding, and b is the half sectional view after the sheet material hot-drawn for the second time moulding;
The a of Fig. 6 is the front view of heat spoke behind the screw hole, the half sectional view of the b spoke that is heat behind the screw hole;
The a of Fig. 7 is the front view of heat spoke behind the screw pit, the half sectional view of the b spoke that is heat behind the screw pit;
The a of Fig. 8 be heat dash periphery four flat lack and louvre after the front view of spoke, b be heat dash periphery four flat lack and louvre after the half sectional view of spoke;
The a of Fig. 9 be heat smart behind screw hole, the centre bore front view of spoke, b be heat smart behind screw hole, the centre bore half sectional view of spoke;
The a of Figure 10 is the front view of spoke behind ream, hinge aperture, the taper hole, and b is the half sectional view of spoke behind ream, hinge aperture, the taper hole.
The a of Figure 11 is the front view of the wheel after wheel wright's skill according to the present invention press-fits, welds, and b is the half sectional view of the wheel after wheel wright's skill according to the present invention press-fits, welds.
The specific embodiment
Below in conjunction with preferred embodiment the present invention is described in detail, should be noted that, in description described later, although employed term is to select from public term, but some term then is the applicant to be judged by it and selects, and the spirit that its detailed meanings should desire discloses according to the present invention is understood.For example, aftermentioned wheel rim, spoke, wheel comprise semi-finished product in process just or the finished product that has processed, and heat processing techniques such as aftermentioned hot-stretch, heat are rolled, hot extrusion, drop stamping, hot bending mainly are meant the processing technology in the temperature range that mechanical property that metallograph and the wheel according to magnesium alloy is designed selects.
As shown in Figure 1, the magnesium alloy vehicle wheel that the present invention will make comprises wheel rim 1 and spoke 2, and wheel rim 1 and spoke 2 weld together.The manufacturing process of following explanation earlier wheel rim of the present invention.
First embodiment
Wheel rim manufacturing process of the present invention mainly comprises: hot extrusion step, full circle step and processing pore step.
In the hot extrusion step, at first the magnesium alloy bar is pressed customized cut-off, with reference to a of Fig. 2.In a cover hot-extrusion mold (cross section shaped device), the magnesium alloy bar is squeezed into the wheel rim semi-finished product then, particularly, earlier the magnesium alloy bar is hot extruded into the section bar of predetermined section, for example form more than half oval wheel rim shown in the b of Fig. 2 on the arc orbit at vertical shaped device then, oval wheel rim herein is meant that mainly shape is near ellipse or oval wheel rim, for example, the half-finished two ends of wheel rim shown in the b of Fig. 2 are rolled on a little circular orbit, and the centre is rolled on a big circular orbit, and perhaps these wheel rim semi-finished product directly curve on an elliptic orbit.Aforementioned more than half ellipse for example is 2/3 ellipse.Temperature in this hot extrusion step mainly is to select according to the metallograph of magnesium alloy, for example at 430 ℃-450 ℃.In the hot extrusion step, just hot extrusion gained section bar is made vertical processing and forming, the two ends of section bar can be curved circular arc like this, otherwise the two ends of section bar can not be round as a ball.
In the full circle step, to be placed on the spheronizator by the oval wheel rim semi-finished product that the hot extrusion step obtains, the temperature of spheronizator is selected according to the magnesium alloy metallograph, for example at 150 ℃-200 ℃, utilize spheronizator that oval wheel rim semi-finished product heat is rolled into wholecircle, shown in the c of Fig. 2.Afterwards, the girth according to predetermined trims weld bond in the docking site 4 of wholecircle wheel rim, and grinds leg, and the preparatory technology that also promptly welds is shown in the d of Fig. 2.Because after trimming weld bond, the circularity of wheel rim needs further to adjust, so wheel rim is put on the clamp body of press, clamp body, wheel rim are heated to synchronously the temperature pressurization full circle of selecting according to the magnesium alloy metallograph, the temperature between 250 ℃-350 ℃ pressurization full circle for example, press for example is 63 tons of press, and further the wheel rim behind the full circle is shown in the e of Fig. 2.Then, beginning is welded at 4 places in the docking site, for example adopt ac argon arc weld meet sb. at the airport the configure dedicated anchor clamps fixedly wheel rim come constant speed welding, the wheel rim after the welding is shown in the f of Fig. 2, welding procedure herein comprises that the weld bond of polishing is level and smooth to polishing certainly.
At last, processing pore step is the pore that processing is used to place valve cock on the wheel rim of circle, and processing pore step can be carried out at normal temperatures.
Second embodiment
Magnesium alloy vehicle wheel manufacturing process of the present invention mainly comprises wheel rim manufacturing process, spoke manufacturing process and assembled welding process.
The wheel rim manufacturing process can be implemented with reference to aforementioned first embodiment.
The spoke manufacturing process mainly comprises sheet material blanking step, hot-stretch forming step and drop stamping step.Sheet material blanking step as shown in Figure 3, heating sheet material to 280 ℃-350 ℃ is gone out the centre bore on circular sheet material and the sheet material again.The hot-stretch forming step comprises the hot-stretch step in the present embodiment twice, respectively as shown in Figure 4 and Figure 5, certainly, can select different hot-stretch steps to different spoke shapes, the hot-stretch step for example is to heat stretching on 200 tons of two dynamic compressors, and draft temperature is between 280 ℃-350 ℃.The drop stamping step mainly be on spoke heat go out flatly lack, louvre, screw hole, screw pit etc.As shown in Figure 6, heat is gone out 4 screw holes 5, as shown in Figure 7, and at further corresponding 4 screw pits 6 of hot-stretch moulding.Again as shown in Figure 8, heat is dashed peripheral four pieces scarce 7 and a plurality of louvre 8.Then, heat is smart in screw hole 5, smart towards centre bore, as shown in Figure 9 again.At last, as required, ream, hinge screw hole 5, as shown in figure 10.In the procedure of processing of hole, the temperature that needs heating is also between 280 ℃-350 ℃.
Referring to accompanying drawing 11, in assembled welding process, earlier the spoke that processes is press fit into the wheel rim ad-hoc location, weld each connecting section with flowing into the alternating-current argon arc welder constant speed again, then the wheel after the welding is heat-treated, handle to eliminate welding interior stress, at last wheel is carried out surface treatment, promptly whole wheel surface is carried out hard anodizing and handle so that its surface is corrosion-resistant.Aforementioned hot is handled and process of surface treatment can adopt existing technology to implement, and is not described in detail at this.
Though the present invention describes with reference to current specific embodiment, but those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, should understand and wherein can make variations and modifications and do not break away from the present invention in a broad sense, so be not as limitation of the invention, for example, the aforementioned temperature scope mainly is to select according to the metallograph of magnesium alloy and the needed mechanical property of designer, and temperature that not necessarily will be confined to illustrate in the previous embodiment or temperature range, the magnesium alloy of previous embodiment for example is the AZ31 magnesium alloy, therefore, as long as in connotation scope of the present invention, to the variation of the above embodiment, modification all will drop in the scope of claims of the present invention.
Claims (10)
1. a magnesium alloy vehicle wheel manufacturing process is characterized in that, comprises wheel rim manufacturing process, spoke manufacturing process and assembled welding process;
Described wheel rim manufacturing process comprises hot extrusion step, full circle step and processing pore step;
In the hot extrusion step, will be hot extruded into the section bar of predetermined cross-section according to the magnesium alloy bar that fixed length cutting becomes, again this section bar hot bending in vertical shaped device is become the wheel rim semi-finished product of more than half elliptical shape;
In the full circle step, at first utilize circle rolling device that the wheel rim semi-finished product heat of ovalize is rolled into wholecircle, the preparatory technology that these wheel rim semi-finished product of wholecircle are welded again, and then utilize pressue device to these wheel rim semi-finished product of wholecircle full circle that further pressurizes, at last the half-finished joint of this wheel rim is welded;
In processing pore step, process the pore that is used to be provided with valve cock;
Described spoke manufacturing process comprises sheet material blanking step, hot-stretch forming step and drop stamping step;
In sheet material blanking step, drop stamping goes out the centre bore on circular sheet material and the circular sheet material;
In the hot-stretch forming step, the hot-stretch of circular sheet material being carried out pre-determined number according to the spoke shape is to produce the spoke semi-finished product;
In the drop stamping step, drop stamping goes out the structure of a plurality of connection usefulness and the structure of heat transmission on the spoke semi-finished product;
In described assembled welding process, to be press fit into the wheel rim that processes according to described wheel rim manufacturing process according to the spoke that described spoke manufacturing process processes, and the connecting section of this spoke and this wheel rim welded, eliminate the heat treatment of welding interior stress then, and whole wheel surface is carried out surface treatment.
2. magnesium alloy vehicle wheel manufacturing process as claimed in claim 1 is characterized in that, in the hot extrusion step, the technological temperature of hot extrusion is between 430 ℃-500 ℃.
3. magnesium alloy vehicle wheel manufacturing process as claimed in claim 1, it is characterized in that, in the full circle step, the technological temperature that the wheel rim semi-finished product heat of ovalize is rolled into wholecircle further heats the technological temperature of full circle between 250 ℃-350 ℃ to these wheel rim semi-finished product of wholecircle between 150 ℃-200 ℃.
4. magnesium alloy vehicle wheel manufacturing process as claimed in claim 1 is characterized in that, in sheet material blanking step, the technological temperature of drop stamping is between 280 ℃-350 ℃.
5. magnesium alloy vehicle wheel manufacturing process as claimed in claim 1 is characterized in that, in the hot-stretch forming step, the technological temperature of hot-stretch is between 280 ℃-350 ℃, and in the drop stamping step, the technological temperature of drop stamping is also between 280 ℃-350 ℃.
6. magnesium alloy vehicle wheel manufacturing process as claimed in claim 1 is characterized in that, the material of wheel rim and spoke is the AZ31 magnesium alloy.
7. the wheel rim manufacturing process of a magnesium alloy vehicle wheel is characterized in that, comprises hot extrusion step, full circle step and processing pore step; Wherein,
In the hot extrusion step, will be hot extruded into the section bar of predetermined cross-section according to the magnesium alloy bar that fixed length cutting becomes, again this section bar hot bending in vertical shaped device is become the wheel rim semi-finished product of more than half elliptical shape;
In the full circle step, at first utilize circle rolling device that the wheel rim semi-finished product heat of ovalize is rolled into wholecircle, the preparatory technology that these wheel rim semi-finished product of wholecircle are welded again, and then utilize pressue device to these wheel rim semi-finished product of wholecircle full circle that further pressurizes, at last the half-finished joint of this wheel rim is welded;
In processing pore step, process the pore that is used to be provided with valve cock.
8. wheel rim manufacturing process as claimed in claim 6 is characterized in that, in the hot extrusion step, the technological temperature of hot extrusion is between 430 ℃-500 ℃.
9. wheel rim manufacturing process as claimed in claim 6, it is characterized in that, in the full circle step, the technological temperature that the wheel rim semi-finished product heat of ovalize is rolled into wholecircle further heats the technological temperature of full circle between 250 ℃-350 ℃ to these wheel rim semi-finished product of wholecircle between 150 ℃-200 ℃.
10. wheel rim manufacturing process as claimed in claim 6 is characterized in that, the material of described wheel rim is the AZ31 magnesium alloy.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008102015241A CN101722401B (en) | 2008-10-22 | 2008-10-22 | Process for manufacturing magnesium alloy wheel |
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| CN2008102015241A CN101722401B (en) | 2008-10-22 | 2008-10-22 | Process for manufacturing magnesium alloy wheel |
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| CN101722401A true CN101722401A (en) | 2010-06-09 |
| CN101722401B CN101722401B (en) | 2011-07-20 |
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| CN2008102015241A Expired - Fee Related CN101722401B (en) | 2008-10-22 | 2008-10-22 | Process for manufacturing magnesium alloy wheel |
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| FR2620060A1 (en) * | 1987-09-07 | 1989-03-10 | Gigoux Michel | Method of manufacturing wheels using an extruded profile with a flange which will form a ring receiving the wheel-body |
| RU2095184C1 (en) * | 1995-11-22 | 1997-11-10 | Валерий Николаевич Щерба | Method for combined manufacture of wheels from light-weight alloys |
| CN1140424C (en) * | 2000-03-08 | 2004-03-03 | 山东济宁车轮厂 | Production process of stainless steel wheel for motor vehicle |
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| CN103269812B (en) * | 2010-10-22 | 2016-11-23 | 西瑞尔贝兹公司 | Structure member and manufacture method |
| CN102152070A (en) * | 2011-02-17 | 2011-08-17 | 中国航空工业集团公司北京航空材料研究院 | Method for manufacturing ring-shaped piece |
| CN102294575A (en) * | 2011-08-19 | 2011-12-28 | 苏竞 | Manufacturing method of light vehicle aluminium alloy hubs |
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| CN104551551A (en) * | 2014-11-25 | 2015-04-29 | 浙江金固股份有限公司 | Thermally-stamped wheel manufacturing method |
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| CN104551554B (en) * | 2014-11-25 | 2017-01-18 | 浙江金固股份有限公司 | Manufacturing method of externally-upset stamped and hardened wheel |
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