土耳其头RZ1结构分析及应用研究

介绍了加工槽形丝的辊拉———冷轧法，及土耳其头ＲＺ１的应用。通过ＲＺ１原理及结构的分析，为自行设计、制造有关土耳其头提供了参考和借鉴。

土耳其头轧制椭圆管的孔型设计

介绍了采用土耳其头轧制椭圆管的成型辊孔型设计原则、设计步骤以及各架次成型辊参数的计算公式。以土耳其头轧制椭圆管孔型各变形边长度不变的原理作为设计孔型的依据,各架次的变型量按等差级数递减,可以得到较好几何尺寸精度和表面质量的成品椭圆管。

中频正火焊管的在线矫直

针对焊接油管、套管、锅炉管的焊缝在中频正火热处理时管子弯曲的现象,提出在定径段增设垂直、横向、周向可调的土耳其头机架,对焊管的弯曲实现反弯变形,从而达到在线矫直的目的。

高精度不锈钢尖角方矩形管的生产技术

根椐直缝方矩形焊管的变形规律、特点及影响质量的主要因素提出了高精度不锈钢尖角方矩形管的变形机制,形成了一整套的方矩形尖角管的工艺设计方法,提出了计算公式。该方法利用管坯的塑性变形填充方矩形管角部形成尖角,共使用两架土耳其头,各土耳其头轧辊之间相互定位,相互制约,以提高方矩形管的精度和生产过程的稳定性。在钢管纵向,利用定径机组的圆形管坯直接推进两架被动的土耳其头而形成尖角管。第一道土耳其头的主要作用是轧制出角(压角),第二道土耳其头的主要作用是轧制出平面(压面),这种方法较大地提高了方矩形管的尺寸精度,改善了方矩形管的角部形状,使用普通焊管机组能生产出高精度的方矩形管,用于装饰结构工程、体育器材、厨房装修等高品质工程。

The Importance of Hair Goats in Turkey

Of the goat population in Turkey, 98% of the goat population consists of hair goats. They are the prime breeds of goats and they can be bred in the Mediterranean, Aegean and Southeast regions of Turkey. Hair goats are the main income for their breeders. The goats are typically raised in scarce conditions, thus giving rise to greater yield of meat. In spite of the fact that the studies are limited to hair goats bred by the public, in 2005, Republic of Turkey Ministry of Food, Agriculture and Livestock （TAGEM） initiated a countywide reclamation project aiming to identify the regional differences and characteristics of the hair goats. This paper focuses on the yearly quantity of hair goats＇ produce, particularly observing the proportions of goat milk, meat and other animal produce, and to highlight the importance of the hair goats. Recommendations are made from these findings.