SU582014A1 - Method of making the passes of cold tube-rolling mills - Google Patents
Method of making the passes of cold tube-rolling millsInfo
- Publication number
- SU582014A1 SU582014A1 SU7602321597A SU2321597A SU582014A1 SU 582014 A1 SU582014 A1 SU 582014A1 SU 7602321597 A SU7602321597 A SU 7602321597A SU 2321597 A SU2321597 A SU 2321597A SU 582014 A1 SU582014 A1 SU 582014A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- passes
- making
- rolling mills
- cold tube
- rolling
- Prior art date
Links
Landscapes
- Control Of Metal Rolling (AREA)
Description
лучасмые в результате следующей операции - термообработки (закалки), определ ют пе только требуемую прочность, но и повышенную износостойкость ручьев калибров.The best results of the next operation, heat treatment (quenching), determine not only the required strength, but also the increased wear resistance of the gauge streams.
Предлагаемый способ осуществл етс еледующим образом.The proposed method is carried out in the following manner.
На мехапическн обработанной поковке растачнвают черновой ручей. После расточки ручь согласно требуемой калибровке калибры обычным путем устанавливаютс в нодвижную клеть стана холодной прокатки труб и прокатывают в них несколько трубных заготовок на онравке.At the machined forging, a rough creek is being pulled. After boring, the brook, in accordance with the required calibration, is calibrated in the usual way into the moving stand of the cold-rolling mill and rolled into several billets in the mill.
Трубна заготовка в данном случае выполн ет роль инструмента при нрокатке ручьев калибров и имеет круглое поперечное сечение н начальные размеры, соответствующие размерам начала обжимного участка ручь обрабатываемого калибра. Материал заготовкиинструмента и калибра подбираютс таким образом , чтобы предел текучести материала калибров был выше предела текучести материала заготовки. Папример, если калибр изготовлен из стали ШХ15 с пределом текучести 8000 кг/см, то дл трубной заготовки-инструмента выбираетс сталь 10 или 20 с пределом текучести 2100-2500 кг/см.The tubular billet in this case performs the role of a tool for rolling brooks of calibres and has a circular cross section and initial dimensions corresponding to the dimensions of the beginning of the crimping section of the brook of the gauge being processed. The workpiece material of the tool and gauge is selected so that the yield strength of the material of the calibres is higher than the yield strength of the workpiece material. For example, if the gauge is made of ShKh15 steel with a yield point of 8000 kg / cm, then steel or 10 with a yield point of 2100-2500 kg / cm is selected for the pipe blank tool.
Высокие удельные давлени , возникающие в мгновенном очаге деформации, при прокатке превосход т по своей величине пределы текучести материала трубной заготовки и калибров , вызыва деформацию трубной заготовкиинструмента на величину, обусловленную калибровкой , а калибр-на величину 0,5-I мм.The high specific pressures that occur in the instantaneous deformation zone, when rolled, exceed in their magnitude the yield strengths of the tube billet material and gauges, causing the tube billet to deform by the amount due to calibration and the caliber by 0.5-1 mm
причем така величина деформации характерна только дл нетермообработанных калибров, т. е. с учетом припусков на термообработку. После прокатки калибры извлекают из клети и нодвергают термообработке. После термообработки предел текучести калибров значительно возрастает, и местные пластические деформации имеют незначительную величину. Затем калнбры шлнфуют, калибруют.moreover, such a deformation value is characteristic only for non-heat-treated calibers, i.e. with allowance for heat treatment allowances. After rolling, gauges are removed from the cage and heat treated. After heat treatment, the yield strength of calibers increases significantly, and local plastic deformations are of insignificant value. Then the calnbras are filled, calibrated.
Калибры, изготовленные предложенным способом , имеют повышенную износостойкость ручьев, что обуславливает в 1,5-2 раза больший срок их службы, сокращает количество остановок стана дл замены калибров и позвол ет увеличить выпуск продукции на 10- 20%.The gauges made by the proposed method have an increased wear resistance of the streams, which leads to a 1.5-2 times longer service life, reduces the number of stops of the mill for changing gauges and allows an increase in output by 10-20%.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU7602321597A SU582014A1 (en) | 1976-02-04 | 1976-02-04 | Method of making the passes of cold tube-rolling mills |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU7602321597A SU582014A1 (en) | 1976-02-04 | 1976-02-04 | Method of making the passes of cold tube-rolling mills |
Publications (1)
Publication Number | Publication Date |
---|---|
SU582014A1 true SU582014A1 (en) | 1977-11-30 |
Family
ID=20647993
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU7602321597A SU582014A1 (en) | 1976-02-04 | 1976-02-04 | Method of making the passes of cold tube-rolling mills |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU582014A1 (en) |
-
1976
- 1976-02-04 SU SU7602321597A patent/SU582014A1/en active
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