Numerical Simulation Of Cooling Water Channel Structure And Strength Of Super High Strength Steel Plate Hot Forming Die

Hot stamping forming technology is the sheet to be heated to austenitizing temperature,after a period of time insulation to achieve complete austenitizing,in the forming and quenching obtain martensitic organization,makes the low yield strength steel plate into ultra high strength parts.According to the above definition,we can know that hot stamping die needs to realize two tasks:first,the forming high temperature plate;second,to quench the plate to make it happen to fully martensitic transformation.To make the high temperature austenitizing sheet for quenching and obtain martensitic organization,mold design of cooling channel is the key,if the design of the cooling water channel which in turn is bound to reduce the mechanical strength of the mold,the mold to normal service forming plates under high temperature and pressure maintaining,it must meet certain mechanical strength.Therefore,it is of important practical significance to analyze the structure of the cooling water channel and the strength of the die for the hot stamping die.In this paper,the research on the hot stamping die for the BR1500 HS super high strength steel plate curved bottom groove is to study.First ABAQUS fluid solid coupling numerical model is established,analysis the mould cooling water channel structure parameters on the influence of temperature field of quenching process,it is concluded that without considering the production efficiency of small batch production process,hot stamping die can be designed without cooling water channel;In continuous hot stamping production,hot stamping die must be designed cooling water channel.Then using the deform established the mold strength analysis numerical model,to study the effect of mold cooling water channel structure parameters of die strength,that should be preferred channel diameter and channel center distance to mold surface to die strength effect in hot stamping die design;In order to ensure that the die strength cooling water channel diameter should be less than or equal to 8mm and the minimum thickness of the cooling water channel to the die surface and the minimum thickness of the adjacent cooling water channel should be as much as possible.The thermal stress numerical model was established by ABAQUS,the thermal stress of the die under different temperature conditions was analyzed,and the thermal stress of the die was mainly distributed in the bottom of the mold cooling water channel;In the selection of H13 steel for hot stampingdie materials,the maximum temperature of the mold should be less than 650?.Hot stamping die design principles are summarized in the end,according to this principle,the hot stamping die design is carried out and the experimental verification is carried out,on the experimental results and working process of the die stress analysis,obtains the mold design of the strength is in line with the requirements of the design,but the die block unreasonable;the curved bottom groove type part is not suitable for block design in the width direction,and can be divided into block design in the length direction;the curved bottom groove of a concave die in the length direction and the width direction are not suitable for block design and die can be through the design into integral or avoid the tensile force larger block,thereby improving the strength to increase the service life of the mold.