某型模压硫化小尺寸金属-橡胶件橡胶面凸出量控制研究  

Research on Control of Rubber Surface Protrusion with Small-Sized Metal-Rubber Product by Molded Vulcanization

作　　者：王翠红 WANG Cuihong(Wuhu State-Operated Mechanical Factory,Wuhu 241007,Anhui,China)

机构地区：[1]国营芜湖机械厂,安徽芜湖241007

出　　处：《空军工程大学学报》2025年第1期26-31,共6页Journal of Air Force Engineering University

基　　金：国家重点研发计划项目(2022YFB4601703)。

摘　　要：针对某型小尺寸金属橡胶件硫化后,环形橡胶面呈内外圈高,中间下凹的弧面,不满足设计要求,影响密封性问题,通过测量金属橡胶件胶面最高点和最低点相对金属端面的凸出量以及橡胶本身的下凹量的方法,间接描述橡胶面整体凸出量。采用控制变量法,从模具设计、模压硫化过程和测量前停放时间等维度进行试验,经试验发现,模具成型面设计成半径为50 mm左右的弧面可有效补偿胶面中间的下凹量,将橡胶坯料厚度控制在设计厚度的130%以上,硫化压力控制在6 MPa以上,加压速率控制在40%~60%,测量前停放不少于24 h,可保证橡胶面凸出量满足设计要求,保证密封性能。试验结果表明,改进模具成型面设计,调整橡胶坯料尺寸、硫化压力、加压速率,延长测量前停放时间可有效控制小尺寸金属橡胶件橡胶面凸出量。A small sized metal-rubber part being vulcanized,the annular rubber surface is a curved surface with high inner and outer rings and a concave middle part,and such a product is not only out of keeping with the design requirements but also an affection of sealing performance.By measuring the protrusion amounts of the highest and lowest points of the rubber surface of the metal-rubber part relative to the metal end face and the concave amount of the rubber itself,the overall protrusion amount of the rubber surface is indirectly described.In this paper,the control variable method is utilized for conducting experiments from the dimensions of mold design,molding vulcanization process and stay time before measurement.It appears from these experiments that the mold molding surface designed to about R50 arc surface can effectively compensate the concave amount in the middle of the rubber surface,the thickness of the rubber blank is controlled at more than 130%of the design thickness,the vulcanization pressure is controlled at more than 6 MPa,the increasing pressure controlled at 40%~60%,and the stay before measurement is not less than 24 hours,ensuring the protrusion amount of the rubber surface for meeting the design requirements and the sealing performance.The experimental results show that thanks to the improvement of the design of the mold forming surface,adjustment of the size of the rubber blank,the vulcanization pressure and the pressurization rate,and prolongation of the stay time before measurement,it has become possible to effectively control the protrusion amount of the rubber surface of small sized metal-rubber parts.

关 键 词：金属橡胶件 凸出量 橡胶坯料尺寸 硫化压力 加压速率 

分 类 号：V255.3[一般工业技术—材料科学与工程] TQ330.6[航空宇航科学与技术—航空宇航制造工程]