CN102407270B - Process for manufacturing asymmetrically flared rim and flaring mould - Google Patents

Process for manufacturing asymmetrically flared rim and flaring mould Download PDF

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Publication number
CN102407270B
CN102407270B CN 201010291930 CN201010291930A CN102407270B CN 102407270 B CN102407270 B CN 102407270B CN 201010291930 CN201010291930 CN 201010291930 CN 201010291930 A CN201010291930 A CN 201010291930A CN 102407270 B CN102407270 B CN 102407270B
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groove
enlarging
workpiece
opening
opening angle
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CN102407270A (en
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石磊
肖华
韩非
仝广
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Baoshan Iron and Steel Co Ltd
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Baoshan Iron and Steel Co Ltd
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Abstract

The invention relates to the field of automobile wheel manufacturing, in particular to a process and a mould for manufacturing a wheel rim. A process for manufacturing an asymmetrically flared rim comprises the following steps of: rolling strip steel, welding into a cylindrical barrel, putting the cylindrical barrel on a flaring machine for flaring, and performing roll forming on the flared workpiece to obtain a groove so as to finish the manufacturing of the rim, wherein the workpiece flared and formed on the flaring machine has a shape that the side which is close to the groove is provided with a one-section opening, and the side which is far away from the groove is provided with a two-section opening; and the workpiece has a section shape that the opening angle of a first section on the side which is far away from the groove is 8 to 12 degrees, the opening angle of a second section is 32 to 38 degrees, and the opening angle on the side which is close to the groove is 32 to 38 degrees. The side, which is far away from the groove, of the workpiece is expanded into the two-section opening when flaring operation is performed by the process, so that the fluidity of a material during roll forming is improved, lateral force in a roll forming process is reduced, thickness at the maximum reduction position is increased to a certain extent, the reduction rate is reduced by 25 percent, and the quality of a product subjected to roll forming is improved.

Description

Wheel rim manufacturing process and the flaring die of asymmetric enlarging
Technical field
The present invention relates to automotive wheel and manufacture field, relate in particular to a kind of rim for automobile wheel manufacturing process and mould.
Background technology
The part of wheel surrounding edge is called as wheel rim, and wheel rim is the carrier of tire, and its properties also has a significant effect to the normal use of tire and automobile.Disclose a kind of production technology CN99116450.4 that replaces section bar manufacture rim of vehicle wheel with sheet material in existing technology, utilization is rolled shape technique and sheet material forming is gone out to the section configuration of wheel rim, and reaches corresponding functional requirement.The wheel rim forming technology flow process of steel wheel can be described as following steps, billot volume circle and the enlarging of welding-symmetrical expression-roll shape to complete the manufacture of steel wheel wheel rim, wherein symmetrical expression enlarging and to roll shape be the main forming technology of steel wheel wheel rim.
Due to the needs of follow-up rim and spoke welding procedure, at present the cross sectional shape of circular rim product is dissymmetrical structure, and as shown in Figure 1, groove is not at the center in wheel rim cross section.Therefore when wheel rim with hardness of steel constantly after lifting, the processing technology of utilizing existing symmetrical expression enlarging and rolling shape there will be following problem:
(1) groove due to asymmetric rim is not in center, but a deflection side wherein, therefore forming pockets roll shape technique, the material at groove two ends flows inhomogeneous, has produced a side force paralleled to the axis.When adopting high-strength steel processing wheel rim, excessive side force has proposed high requirement to the load of equipment directive wheel, in order to adapt to the usage trend of high-strength steel, adopt the tonnage of the essential raising equipment of original processing technology, and this will increase equipment cost undoubtedly.
(2) due to groove deflection part one side, away from opposite side less participating in distortion when rolling shape of groove, cause this part material to flow less, complete the workpiece after roll extrusion, the thickness thinning rate of wheel rim groove both sides fillet is inconsistent, and maximum reduction is higher, affects product quality.
Therefore when wheel rim is more and more higher by the intensity of steel, existing symmetrical expression enlarging and the processing technology of rolling shape have affected cost and the quality of wheel rim manufacture.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of wheel rim manufacturing process and flaring die of asymmetric enlarging, when this technique is carried out the enlarging operation, workpiece is expanded as the two-part opening away from groove one side, improve the mobility of material while rolling shape, improved product quality.
The present invention is achieved in that a kind of wheel rim manufacturing process of asymmetric enlarging, comprise the following steps at first and will after the bar shaped steel plate rolling, be welded into cylindrical tube, then cylindrical tube is placed on to enlarging on pipe-expanding machine, then the workpiece after enlarging is rolled to shape rolls out groove and complete the wheel rim manufacture; Wherein on pipe-expanding machine, the workpiece after the enlarging shaping is shaped as, a side near groove is the one-part form opening, a side away from groove is the two-part opening, the workpiece cross sectional shape is 8 °~12 ° for the opening angle of the first paragraph away from groove one side, the opening angle of second segment is 32 °~38 °, and the opening angle of close groove one side is 32 °~38 °.
Enlarging original position away from groove one side is compared more near groove with the opening original position near groove one side.
The workpiece cross sectional shape of described enlarging postforming is, away from the opening angle of the first paragraph of groove one side, is 10 °, and the opening angle of second segment is 35 °, near the opening angle of a side of groove, is 35 °.
A kind of flaring die of asymmetric enlarging, comprise upper die and lower die, and described patrix consists of top board and truncated cone-shaped upper die body, and top board and upper die body connecting place are provided with stopper slot; Described counterdie consists of base plate and two-part truncated cone-shaped lower mold body, and base plate and lower mold body connecting place are provided with stopper slot.
Described patrix is one of the forming, and top board and upper die body are as a whole.
Described counterdie is one of the forming, and base plate and lower mold body are as a whole.
In the wheel rim manufacturing process of asymmetric enlarging of the present invention, when carrying out the enlarging operation, workpiece is expanded as the two-part opening away from groove one side, make the more close groove of opening away from groove one side, while being conducive to roll shape, the material of this side more participates in the groove forming process, improved the mobility of material while rolling shape, reduced the side force of rolling shape technique, after making to roll shape, thickness thinning rate is more even, and the thickness at maximum attenuate place is increased to some extent, technique of the present invention is rolled the relatively existing technique of reduction after shape and has been reduced 25%, has improved the product quality of rolling after shape.
The accompanying drawing explanation
Fig. 1 is existing wheel rim one side profile schematic cross-section;
Workpiece one side profile schematic diagram in the wheel rim manufacturing process that Fig. 2 is asymmetric enlarging of the present invention after enlarging;
The flaring die structural representation that Fig. 3 is asymmetric enlarging of the present invention.
In figure: 1 groove, 2 stopper slots, 3 patrixes, 4 counterdies, 5 workpiece.
The specific embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only are not used in and limit the scope of the invention for the present invention is described.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's statement, these equivalent form of values fall within the application's appended claims limited range equally.
Embodiment 1
A kind of wheel rim manufacturing process of asymmetric enlarging, comprise the following steps: at first will after the bar shaped steel plate rolling, be welded into cylindrical tube, then cylindrical tube is placed on to enlarging on pipe-expanding machine, then the workpiece after enlarging is rolled to shape rolls out groove and complete the wheel rim manufacture; As shown in Figure 2, wherein on pipe-expanding machine, the workpiece after the enlarging shaping is shaped as, a side near groove is the one-part form opening, a side away from groove is the two-part opening, the workpiece cross sectional shape is 8 °~12 ° for the opening angle A of the first paragraph away from groove one side, the opening angle B of second segment is 32 °~38 °, and the opening angle C of close groove one side is 32 °~38 °; Away from the enlarging original position of groove one side and groove apart from S 1be less than near the opening original position of groove one side and groove apart from S 2.The opening of the workpiece both sides after enlarging is no longer along the kernel of section symmetry like this, compare the more close groove of traditional handicraft away from a side of groove, while being conducive to roll shape, the material of this side more participates in the groove forming process, improve the mobility of material, thus the side force while reducing roll extrusion and improve roll extrusion after product quality.
The workpiece cross sectional shape of described enlarging postforming in the present embodiment is, opening angle A away from the first paragraph of groove one side is 10 °, the opening angle B of second segment is 35 °, near the opening angle C of a side of groove, is 35 °, follow-up like this roll shape processing and can reach best forming effect.
As shown in Figure 3, a kind of flaring die of asymmetric enlarging, comprise patrix 3 and counterdie 4, and described patrix 3 consists of top board and truncated cone-shaped upper die body, and top board and upper die body connecting place are provided with stopper slot 2; Described counterdie 4 consists of base plate and two-part truncated cone-shaped lower mold body, and base plate and lower mold body connecting place are provided with stopper slot 2; Described patrix 3 is one of the forming, and top board and upper die body are as a whole; Described counterdie 4 is one of the forming, and base plate and lower mold body are as a whole.In symmetrical expression enlarging technique, upper and lower die topography is identical, can complete enlarging after the move toward one another certain distance and be shaped.But asymmetric enlarging technique is because the shape of both sides, cross section is inconsistent, the rigidity difference, can cause blank to be moved when enlarging, can't determine the enlarging bore in pattern tool position, therefore need stopper slot 2 on this mould structure, so just can guarantee that workpiece stops when asymmetric enlarging technique reaches the predetermined deformation amount.
During the enlarging technological operation of the present embodiment at first on vertical pipe-expanding machine, patrix 3 and counterdie 4 are separately fixed on upper lower table, and the workpiece 5 that will roll up after circle is placed on counterdie, holding workpiece axis and counterdie dead in line, to guarantee the close contact of workpiece and mould in the enlarging process.Then, patrix under certain operating pressure to lower feeding, during feeding, the axis of enlarging patrix, enlarging counterdie must with the dead in line of workpiece; When at first the workpiece downside completes distortion, and, with after the counterdie stopper slot contacts, patrix continues to lower feeding, until the workpiece upside contacts with the patrix stopper slot, the enlarging that completes workpiece is shaped; Afterwards, the patrix Quick-return, to initial position, at this moment just can take out workpiece.

Claims (3)

1. the wheel rim manufacturing process of an asymmetric enlarging, it is characterized in that: comprise the following steps: at first will after the bar shaped steel plate rolling, be welded into cylindrical tube, then cylindrical tube is placed on to enlarging on pipe-expanding machine, then the workpiece after enlarging is rolled to shape rolls out groove and complete the wheel rim manufacture; Wherein on pipe-expanding machine, the workpiece after the enlarging shaping is shaped as, a side near groove is the one-part form opening, a side away from groove is the two-part opening, the workpiece cross sectional shape is 8 °~12 ° for the opening angle of the first paragraph away from groove one side, the opening angle of second segment is 32 °~38 °, and the opening angle of close groove one side is 32 °~38 °.
2. the wheel rim manufacturing process of asymmetric enlarging as claimed in claim 1 is characterized in that: the enlarging original position away from groove one side is compared more near groove with the opening original position near groove one side.
3. the wheel rim manufacturing process of asymmetric enlarging as claimed in claim 1 or 2, it is characterized in that: the workpiece cross sectional shape of described enlarging postforming is, opening angle away from the first paragraph of groove one side is 10 °, the opening angle of second segment is 35 °, and the opening angle of a side of close groove is 35 °.
CN 201010291930 2010-09-26 2010-09-26 Process for manufacturing asymmetrically flared rim and flaring mould Active CN102407270B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201010291930 CN102407270B (en) 2010-09-26 2010-09-26 Process for manufacturing asymmetrically flared rim and flaring mould

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Application Number Priority Date Filing Date Title
CN 201010291930 CN102407270B (en) 2010-09-26 2010-09-26 Process for manufacturing asymmetrically flared rim and flaring mould

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CN102407270B true CN102407270B (en) 2013-12-25

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106734604B (en) * 2016-12-19 2018-08-07 厦门日上集团股份有限公司 A kind of 15 ° of DC inner tube-free wheel rim flaring dies
CN106903232B (en) * 2017-02-17 2018-09-07 浙江金固股份有限公司 A kind of process and device of wheel rim flaring
CN110405092A (en) * 2019-07-27 2019-11-05 安徽科技学院 A kind of rim for automobile wheel angle flaring die

Citations (2)

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Publication number Priority date Publication date Assignee Title
US5845400A (en) * 1996-01-25 1998-12-08 Topy Kogyo Kabushiki Kaisha Method of manufacturing a one end flange-less wheel rim
CN101376141A (en) * 2008-04-21 2009-03-04 河南科技大学 Press forming method of automobile hub and matched forming mold thereof

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JPS60158933A (en) * 1984-01-30 1985-08-20 Furukawa Alum Co Ltd Manufacture of wheel rim
JPS6390328A (en) * 1986-10-02 1988-04-21 Hiroyuki Kanai Manufacture of rim for disk wheel
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Publication number Priority date Publication date Assignee Title
US5845400A (en) * 1996-01-25 1998-12-08 Topy Kogyo Kabushiki Kaisha Method of manufacturing a one end flange-less wheel rim
CN101376141A (en) * 2008-04-21 2009-03-04 河南科技大学 Press forming method of automobile hub and matched forming mold thereof

Non-Patent Citations (4)

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Title
6J×14车轮轮辋滚型工艺及模具设计;肖海波等;《湖北汽车工业学院学报》;20030630;第17卷(第2期);第31-33页 *
无内胎车轮轮辋扩口模具设计;纪莲清等;《郑州轻工业学院学报》;19990630;第14卷(第2期);第4-7页 *
纪莲清等.无内胎车轮轮辋扩口模具设计.《郑州轻工业学院学报》.1999,第14卷(第2期),第4-7页.
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