Rolling is a pro弟秒cess method in which the billets of ce都理rtain metal materials ar場中e rolled by rolling tools with a c西筆ertain cross-section, resulting in rat放讀ional deformation in the p關匠roduction area,匠他 thereby forming the corresponding 道笑cross-section of the workpiece.

From this, it can是照 be seen that hydraulic scre問文w thread is a ki國技nd of chip free threading method. The家文 essence of a thread rolling m視通achine is to use the plasticity of cer遠男tain materials in the cold state to thr玩了ead, causing the blank 票年to undergo plast中木ic deformation and create corres下聽ponding threads unde報說r the pressure of 河下the rolling limit tool.商個

The process of rolling thre學鄉ads in a cold state h錯雪as been in progress 也算since 1831, when a thread control黑現 machine was first used從從 to twist the drill 還大bolts used to fasten railway 明現sleepers. However, it was not wid身媽ely used for rolling pre件黃cision threads until 1940. This is mai你可nly due to the f老黃act that in the late 19th and ea農又rly 20th centuries, the 用妹blank material was not動得 suitable for rolli窗男ng. With the fur村這ther improvement of the 場報mechanical properties 河地of blank materials, as well a還哥s the successful development of都我 precision hydraulic tools微技 and higher technological perfor會一mance thread rolling machin可年es, the rolling processing technolo兒靜gy of thread rolling mac她街hines has gained greate麗拍r popularity, an數好d can be used in carbon sodium 嗎們"Alloy steel (including s好懂tainless steel, tool steel, bronze,一黃 brass, aluminum, stai畫玩nless steel, drill, n兒了ickel, powder metall拿物urgy, and plastic) is u路她sed for rolling processing va裡銀rious types of threads 船器(including precision舞笑 threads) on various bl科秒ank materials, such as taps兒紅, engine anchor bol照場ts, power drill bolts會呢, spindle and screw threads, and t民銀hreads on hollow thin-wa有內lled parts."影章;.

In the process of hydraulic thre個朋ading, the proce兵山ssed thread is the res飛區ult of redistribution of the 刀民blank metal extruded from the working t遠海hread of the rolling tool.