Forming methods of one-piece wheels without welding seam made of metal sheets
a technology of metal sheet and welding seam, which is applied in the direction of metal-working apparatus, transportation and packaging, vehicle components, etc., can solve the problems of reducing production efficiency, low production efficiency, and complicated present methods of manufacturing wheels made of metal sheet, so as to improve production efficiency, reduce manufacturing steps, and high strength and rigidity performance
Inactive Publication Date: 2017-08-17
SHANGHAI XINGPU SPINFORMING WHEEL
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Benefits of technology
The present invention provides a method for making a one-piece weldless wheel made of metal sheets. This method reduces manufacturing steps and improves production efficiency, resulting in high-strength and rigidity performance with a long service life. The method also produces wheels with high precision, with equal strength on all force-bearing surfaces regardless of thickness. There will be no air leakage due to the absence of welding seams, making the wheel safer. The method includes less steps than traditional methods, saving power consumption and reducing pollution.
Problems solved by technology
Thus, it can be seen that the present methods of manufacturing wheels made of metal sheets is extremely complicated.
Hence the steps of the methods in the prior art generally contain more than twenty steps, resulting to quite low production efficiency.
Additionally, complicated air tight tests are necessary for the wheels made of metal sheets manufactured by such methods, which further reduces the production efficiency.
Thus, the wheel will not perform well on strength and rigidity, and fatigue breaks will be easily generated at the welding seams 3 and the butt welding seam 4.
Method used
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[0040]The forming method of the one-piece weldless wheel made of metal sheets according to the present invention will be further described by the following embodiments along with the drawings. However, it is known that the embodiments and related descriptions should not be the limitation of the present invention.
[0041]FIG. 2 shows a schematic flow diagram of an embodiment of the forming method of the one-piece weldless wheel made of metal sheets according to the present invention. And FIGS. 3-14 respectively show each step of the flow diagram represented in FIG. 2.
[0042]As shown in FIGS. 2-14, a one-piece weldless wheel made of metal sheets is manufactured by steps as follows:
[0043]B-1: Forming a circular blank 1 (as shown in FIG. 3).
[0044]B-2: Punching a center hole 2 on the circular blank 1 (as shown in FIG. 4).
[0045]B-3: Placing the circular blank in a rolling mould 3 with a circular outer profile. And then rolling the circular blank into a wheel blank 5 by performing planar sync...
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Abstract
Forming methods of one-piece weldless wheels made of metal sheets including the steps of rolling, forming a primary wheel rim and a primary wheel disc, roll forming, compressing and shaping, in order to obtain one-piece weldless wheels. The methods can form weldless wheels by rolling, cold roll forming and cold extruding, which can reduce energy consumption by 45-55% and cut down material cost by 5-15% while improving strength of the wheel by 20-30%. A wheel with different thicknesses can be formed by the methods and can meet the requirements on mechanical strength. The methods can improve the precision of the wheel and minimize the swing value and jerk value. The wheel produced is safer, and the regular air tight test on the wheel is not necessary.
Description
FIELD OF THE INVENTION[0001]The invention relates to forming methods of wheels, and particularly relates to forming methods of one-piece weldless wheels made of metal sheets.BACKGROUND OF THE INVENTION[0002]In the prior art, the methods for manufacturing wheels made of metal sheets include that manufacturing wheel rims and wheel discs separately, and then integrating the wheel rims and the wheel discs into the whole wheels by welding. The specific process may include the following steps:[0003]The steps of manufacturing the wheel rims including: R-1 uncoiling coiled material; R-2 pressing the material into flat sheets; R-3 butt welding; R-4 curling circles; R-5 butt welding; R-6 scraping slag; R-7 trimming the end; R-8, 9, 10 cold rolling in three processes; R-11 extending and sizing; R-12 punching valve holes;[0004]the steps of manufacturing the wheel discs including: D-1 uncoiling coiled material; D-2 rolling the material into flat sheets; D-3 forming square blanks; D-4 multi-stati...
Claims
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IPC IPC(8): B21D53/26B21D22/14B21D53/30B21D17/04
CPCB21D53/264B21D53/30B21D22/14B21D17/04B21D22/02B21D22/16B21D28/30B21H1/10
InventorZHANG, XINGYUAN
OwnerSHANGHAI XINGPU SPINFORMING WHEEL