汽车防撞横梁内高压成型机液压机械 佛山思豪液压机械 基本介绍 
 
 
 
一、内高压成行发展史
 
 
德国于20世纪70年代末开始内高压液力成形基础研究，并于90年代初开始在工业生产中采用内高压成形技术制造汽车轻体构件，90年代中国开始引进这项技术，进入21世纪开始充分应用于市场产品当中，并得到快速发展，可控水压逐年快速递增：2000-2006年水80MPa，2006-2010年水压120MPa,2010-2013年水压160MPa，2013-2015年水压200MPa,2015-2017年水压240MPa，2017-2019年水压300MPa,2020-2023年水压400MPa。
 
 
 
 
Germany started basic research on internal high pressure hydroforming at the end of 1970s,: water 80MPa,: 120MPa in 2006-2010, 160MPa in 2010-2013, 200MPa in 2013-2015, 240MPa in 2015-2017, 300MPa in 2017-2019 and 400MPa in 2020-2023. 
 
 
 
 
 
二、成形原理
 
 
内高压成形原理是通过内部加压和轴向加力补料，将管坯压入模具型腔使其成形，成形时内压和轴向进给按事先给定的匹配关系，由计算机精确控制。
 
 
 
 
The principle of internal high pressure forming is to press the tube billet into the mold cavity by internal pressure and axial force feed, which is precisely controlled by computer according to the given matching relationship during forming. 
 
 
 
 
 
三、工艺介绍
 
 
其成形工艺过程可以分为三个阶段，如图1所示。初始充填阶段（图1a）模具闭合后，将管的两端用水平冲头密封，使管坯内充满液体，并排出气体，实现管端冲头密封；成形阶段（图1b），对管内液体加压胀形的同时，两端的冲头按照设定的加载曲线向内推进补料，在内压和轴向补料的联合作用下使管坯基本贴靠模具，这时除了过渡区圆角以外的大部分区域已经成形；整形阶段（图1c），提高压力使过渡区圆角完全贴靠模具而成形为所需的工件。
 
 
 
 
(Figure 1a) when the die is closed, both ends of the pipe are sealed with a horizontal punch, which fills the billet with liquid and discharges gas to achieve the end punch seal; during the forming stage (Figure 1b)At the same time, when the liquid in the pipe is pressurized and bulged, the punches at both ends push the filler inward according to the set loading curve, and under the combined action of internal pressure and axial filler,, most areas except the fillets in the transition zone have been formed; at the shaping stage (Figure 1c), increasing the pressure makes the fillets in the transition zone fully adhere to the die and become the required workpiece.
 
 
 
 
 
  
充填阶段
 
 
 
 
 
 
 
 
 
  
成形阶段
 
 
 
 
 
 
 
 
c. 整形阶段
 
 
C. Plastic stage 
 
 
图1 变径管件内高压成形工艺过程
 
 
Fig.1 High pressure forming process for variable diameter tube
 
 
成形过程中涉及主要工艺参数/The main process parameters are involved in the forming process：
 
 
初始屈服压力Ps：管材开始发生塑性变形时所需要的内压；
 
 
开裂压力Pb：贴模前内压应小于开裂压力；
 
 
整形压力（成形压力）Pc：用于成形截面过渡圆角，并保证尺寸精度；
 
 
轴向进给力Fa：实现轴向补料；
 
 
合模力Fc：使模具闭合不产生缝隙；
 
 
补料量△l：减少成形区壁厚减薄，并提高膨胀率。
 
 
Initial yield pressure Ps: The internal pressure required for the tube to begin plastic deformation;
 
 
Cracking pressure Pb: The internal pressure before bonding should be less than the cracking pressure;
 
 
Reshaping Pressure (Forming Pressure) Pc: Used to shape transition rounded corners of cross sections and ensure dimension accuracy;
 
 
Axial feed force Fa: to achieve axial filling;
 
 
Mould closing force Fc: Make the mould close without creating gaps;
 
 
Feed amount Delta l: reduce the thickness of the forming area and thin the wall, and increase the expansion rate.
 
 
 
 
 
四、设备特点/Characteristics of the equipment
 
 
1.采用自来水作为加工成形介质
 
 
2.加工成型件量身定制，批量生产，产能提高10-50倍
 
 
3.伺服技术为企业节电30-70%
 
 
4.伺服同步精度小于0.05mm
 
 
5.轴向进给精度0.03mm
 
 
6.液压系统液压油升温降幅60%
 
 
7.密封件使用    2倍
 
 
8.提高原件材料利用率超过80%
 
 
9.内高压水压400Mpa.100万次无故障
 
 
10.可搭载工业机器人的数控系统。 
 
 
 
 
10-50 times through customized processing and mass production
 
 
30-70% electricity for enterprises
 
 
0.05mm
 
 
0.03mm
 
 
60%
 
 
2 times
 
 
80%
 
 
 
 
 
 
 
  
  
  
 
 
 汽车防撞横梁内高压成型机液压机械 佛山思豪液压机械 性能特点 
 
 
  
  
 
 
 汽车防撞横梁内高压成型机液压机械 佛山思豪液压机械 技术参数 
 
 
  
 
 
 汽车防撞横梁内高压成型机液压机械 佛山思豪液压机械 采购须知 
 

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