Tests are made with three different piercing plug cone shapes to identify shell gauge changes during secondary piercing process.
采用三种不同穿轧锥形状的顶头，通过二次穿孔试验研究了毛管壁厚变化。
According to the characteristics of the part, proposed piercing process with concave die. Introduced die structure and working process.
根据该零件特点，提出了采用有凹模冲孔加工，并介绍了模具结构及工作过程。
The piercing process of seamless steel tube is a hot working process, the distribution of plug temperature is very important to its service life.
无缝钢管的穿孔过程是一个热加工过程，顶头的温度分布对于其寿命至关重要。
This new roll shape is very effective for improving pierced quality of low plastic steel and intensifying piercing process with larger cross angle.
这种新辊型对低塑性钢穿孔质量的改善和实现大前进角强化穿孔过程都有很大意义。
Based on UBEM, the analysis Inodel for press piercing process has been established in this paper and its analytical expressions have been obtained.
采用上限元法建立了压力穿孔过程中穿孔力的分析模型并给出了解析表达式。
Two years' practice shows that the upgraded drum locking device of a piercer can fully meet the requirements of a twice piercing process and is worth wide application.
经两年多的实际使用证明，改进的穿孔机转鼓器完全能满足二次穿孔工艺要求，具有一定的推广价值。
In the cross piercing process, as the piercing precession power can not overcome the resistance force, it will lead to rear-jamming when rolling thick-wall tubes or high alloy tubes.
在斜轧穿孔过程中，由于轧件旋进力克服不了顶头的阻力，因此轧制厚壁管或高合金钢管时在穿孔后期造成后轧卡。
Introduced a kind of compound triming die with connecting rods, it could finished the piercing and triming and sizing process in one press, the working efficiency is high, triming quality is good.
介绍了一种复合式连杆切边模，可在压力机一次行程过程中完成连杆的冲孔、切边和整形工序，该模具具有工作效率高、切边质量好等优点。
Piercing: refer to artifacts from the ordinary hole punch and mold machining process.
冲孔：指工件由普通冲床和模具加工孔的工艺过程。
The paper studies squeezed cap of piercing plugs nose, failure mechanism of melting, influence factor and the process measure of lengthening the service life of plug.
研究了穿孔顶头鼻部压堆戴帽和熔化的失效机制，影响因素，提出了延长顶头使用寿命的工艺措施。
The production process and its features of piercing plug by precision hot-die-forging are detailed.
本文介绍了精密热模锻穿孔顶头的生产工艺及工艺特点。
The rational process for producing the steel is recommended on the basis of analyzing the emergence and developing mechanism of cracks in shells of the steel during hot piercing.
分析了热穿孔过程中毛管裂纹的产生及扩展机理。推荐了生产该钢种的合理工艺。
Introduced the characteristics of the gear box case, and determinded the reasonable forming process, designed the drawing die, the trimming die, the piercing die and the flanging die.
结合实际，介绍了带内孔的薄板锻件的工艺难点，并就此工艺难点的解决介绍了锻件切边、冲孔模具的优化设计。
On the analysis of the forming process of the reinforcing plate, introduced the forming process and the 3d design of piercing die.
分析上支座加强板的成形工艺，并着重介绍成形工艺中的冲孔模的三维设计。
The test of sulphurized tufftride process for treating the hot piercing punch for steel pipes is introduced.
介绍了钢管热冲孔凸模硫氮碳共渗工艺试验。
We produce body piercing jewelry: UV puncture jewelry, acrylic piercing jewelry, the printing process, resin process, mable process.
青岛双合盛工艺品厂主要生产人体穿刺饰品：UV穿刺饰品、亚克力饰品、印刷工艺、树脂工艺、抹布工艺。
In terms of the feature of the self-piercing riveting process test, the evaluation index system for the riveting process program is constructed.
针对自冲铆接工艺试验的特点，构建了铆接工艺方案的评价指标体系。
The wood piercing carving process has easier process operation, obviously shortened processing time, reduced cost, lowered carving difficulty, low loss rate, and high yield.
本发明的木材透空雕刻工艺操作比较容易，加工时间明显缩短、成本降低、雕刻难度降低、损耗率小、成品率高。
The technological process for stamping the decoration part inside the car was analyzed. And the structure of the pressing and piercing die for the decoration part was mainly introduced.
分析了车厢内装饰件的冲压工艺，着重介绍了车厢内装饰件压形切口模的结构。
The process would be horribly piercing, however, when the shell is eventually gone what embraces the cicada would definitely be enormous relief and the glamour of life.
这个变化过程非常揪心，但是，当壳最终褪下的时候，围绕蝉的，毋庸置疑，将是巨大的轻松解脱也是生命的魅力。
The correctness of calculating weighting value is validated and the theoretical basis for the specific selection of self-piercing riveting process test is est…
通过对铆接试件的初步静拉力试验和疲劳试验，验证了计算权重值的正确性，为自冲铆接工艺试验方案的比选建立了理论基础。
The correctness of calculating weighting value is validated and the theoretical basis for the specific selection of self-piercing riveting process test is est…
通过对铆接试件的初步静拉力试验和疲劳试验，验证了计算权重值的正确性，为自冲铆接工艺试验方案的比选建立了理论基础。
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