低塑性拔長時，應注意選擇合適的送進比，送進比太小時，變形集中在上下部，中心都鍛不透，并沿軸向產(chǎn)生拉鍛造應關于鍛件的一些基本知識力，導致內部橫向裂紋產(chǎn)生。在鐓粗時，圣霖國際鍛造，常用軟襯墊鐓粗或疊鐓（用于鍛薄餅形零件），圣霖國際鍛造生產(chǎn)，以改善變形的不均勻性，防止產(chǎn)生表面裂紋。

When low plasticity is pulled out， attention should be paid to selecting suitable delivery ratio， sending too much time， deformation ?on the upper and lower parts，圣霖國際鍛造廠， and the center can not be built， and forging along the axial direction should be related to some basic knowledge of forging， resulting in the occurrence of internal transverse cracks. In the upsetting，圣霖國際鍛造采購， commonly used soft liner (for upsetting or folding upsetting forging thin pancake， uneven parts) to improve the deformation， prevent the generation of cracks on the surface.

拔長 拔長是使坯料的長度增加，截面減小的鍛造工序，通常用來生產(chǎn)軸類件毛坯，如車床主軸、連桿等。

沖孔 用沖子在坯料上沖出通孔或不通孔的鍛造工序。彎曲 使坯料彎曲成一定角度或形狀的鍛造工序。

Drawing and drawing is a forging process that increases the length of the billet and reduces the section. It is usually used to produce shaft parts， such as spindle and connecting rod.

Forging punch punching out through holes or blind holes in the blank. The forging process of bending the billet into a certain angle or shape.

鐓粗 鐓粗是對原坯料沿軸向鍛打，使其高度減低、橫截面增大的操作過程。這種工序常用于鍛造齒輪坯和其他圓盤形類鍛件。鐓粗分為全部鐓粗和局部鍛粗兩種。

Upsetting and upsetting is the process of forging the original billet along the axis， reducing its height and increasing its cross section. This process is usually used to forge gear blanks and other disc shaped forgings. The upsetting is divided into two kinds of upsetting and local forgings.

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