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Method for forming two conical sestion ring pieces by once cold rolling spreading
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A ring and conical technology, applied in the field of conical section ring forming, can solve the problems of time-consuming, waste of materials, discontinuous metal fibers, etc.
Inactive Publication Date: 2006-03-22
WUHAN UNIV OF TECH
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This kind of processing technology not only wastes materials, but also takes time, resulting in low production efficiency and high cost, and the structure and performance of the product are not very good, and the metal fibers of the tapered cross-section ring are discontinuous
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example 1
[0039] Example 1: It is integral rolling, that is, two ring blanks are designed together, rolled and expanded as a whole, and then divided into two by turning. A method for forming two tapered cross-section rings by one-time cold rolling, which comprises the steps:
[0040] 1). Cutting: cut the bar into sections, the length of which is L=(1-3)(2T i ), 2T i is the axial dimension of the overall ring blank.
[0041] 2). Blank making: heating the material section to the thermal deformation temperature, upsetting, and then punching, punching and connecting the skin to make the overall ring blank.
[0042] 3). Annealing: annealing the integral ring blank, the annealing temperature is 600°C-800°C, and the time is 1-3 hours.
[0043] 4).Blank rough turning: the annealed integral ring blank is turned into an integral ring blank for rolling; see Picture 1-1 , the outer diameter of the tapered section ring product is D of , the inner diameter of the big end is D if , the cone angl...
example 2
[0057] Example 2: It is a split type rolling, that is, the two ring blanks are independent, and then rolled as a whole. A method for forming two tapered cross-section rings by one-time cold rolling, which comprises the steps:
[0058] 1). Cutting separately: Cut the bar into two sections, the length of each section is L=(1-3)T i ,T i is the axial dimension of the ring blank;
[0059] 2). Blank making: heating the two sections of material to the thermal deformation temperature, then upsetting, then punching, punching and connecting skins to make 2 ring blanks;
[0060] 3). Annealing: annealing of two ring blanks, the annealing temperature is 600°C-800°C, and the time is 1-3 hours;
[0061] 4).Blank rough turning: the two ring blanks after annealing are turned into two ring blanks for rolling; the outer diameter of the tapered cross-section ring product is D of , the inner diameter of the big end is D if , the cone angle is α, and the axial dimension is T f , the equivalen...
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Abstract
The present invention relates to method of forming conic cross section ring and has two technological schemes adopted, including integral rolling and spreading and split rolling and spreading. The present invention features that the cold rolling and spreading process includes the following steps: cutting rod into material sections; heating the material section to heat deformation temperature, upsetting, punching hole and punching connecting sheet to form integral blank; annealing; coarse turning to form integral blank for rolling and spreading; cold rolling and spreading in a rolling and spreading machine with V-slot core roller to form two conic rings; and turning to obtain two conic cross section rings. The present invention has the features of low cost, high production efficiency and high product quality.
Description
technical field [0001] The invention relates to a method for forming a ring with a tapered section, in particular to a method for forming two rings with a tapered section at one time by cold rolling. Background technique [0002] Tapered cross-section ring products are widely used and demanded in industry, such as the inner and outer rings of tapered roller bearings, etc., which not only require high precision, but also require a long service life, and the key to these requirements lies in the tapered Forming quality of section rings. The forming of the existing tapered cross-section rings is often realized by machining methods such as turning. The traditional processing techniques are: blanking, upsetting, punching, annealing, rough turning and finishing turning of inner and outer diameters, and flat end faces. Such a processing technique not only wastes materials, but also takes time, resulting in low production efficiency and high cost, and the structure and performance ...
Claims
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