The utility model discloses a sheet clamp for a plastic sheet tension testing machine, which comprises a clamp body. The two ends of the clamp body are provided with a connecting shaft connected with the tensile testing platform of the tensile testing machine. The clamp body includes an upper clamp plate and a lower clamp plate. The lower part of the upper clamp plate is provided with a socket hole, and the lower clamp plate is provided with a socket plate corresponding to the socket hole. The surface of the fixture plate and the lower fixture plate is provided with a blind groove corresponding to the specimen. The two ends of the blind groove are arranged in an outer width and an inner narrowness. A tension transmission incline with symmetrical inward contraction is arranged between the wide part and the narrow part. The tension transmission incline of the lower fixture plate and the outer side of the wall plate on both sides of the narrow blind groove are hinged with the bottom plate of the lower fixture plate, and the bottom plate is provided with a groove. The lower part is equipped with a convex block corresponding to the groove, and the middle part of the upper and lower fixture plate is not suspended. When the specimen is installed, it has certain support. The installation is simpler and the damage of the specimen is reduced.
【技术实现步骤摘要】
一种塑料片拉伸试验机的片材夹具
本技术涉及一种夹具,尤其涉及一种塑料片拉伸试验机的片材夹具。
技术介绍
目前常用的拉伸试验机夹具采用夹钳夹持试样,通过夹钳夹持面上的花纹与夹钳对试样的压紧力产生静摩擦力,使试样在拉伸过程中不会与夹钳发生相对移动,从而保证实验结果准确。该种类型的夹具适用性较广,但是对于较厚的试样,由于厚试样在拉伸试验中需要较大的拉伸力,为了保证试样在拉伸时不发生相对移动,需要夹钳对试样施加很大的压紧力来保证足够的静摩擦力。这样可能会带来两个方面的问题,一是夹钳需要压的非常紧,给试件的安装和拆卸都带来很大不便;另一个方面是夹钳压的过紧,可能会造成试件在夹持部分发生变形,严重时导致试件在变形区域提前断裂,致使拉伸试验结果无效,申请号为201320663295.1的专利公开了一种新型塑料拉伸性能测试夹具,包括夹具主体,所述夹具主体的一端开设有用于安装试件的试件槽,另一端则设置有用来与与拉伸试验机的拉伸试台相连的连接轴,解决了上述问题,但是其具有以下几个问题,其一:上述专利公开的夹具,在使用时,上、下两个夹具之间是悬空的,安装试件时,通常会对试件中部用力将试 ...
【技术保护点】
1.一种塑料片拉伸试验机的片材夹具,其特征在于,包括夹具本体,所述夹具本体的两端设置有与拉伸试验机的拉伸试台相连的连接轴,所述夹具本体包括上夹具板、下夹具板,所述上夹具板下部设置有插接孔,所述下夹具板上设置有与插接孔对应的插接板,所述上夹具板、下夹具板上表面设置有与试件对应的盲槽,所述盲槽的两端呈外宽内窄设置,宽部与窄部之间设置有向内收缩对称的拉力传递斜面,所述下夹具板的拉力传递斜面与窄部盲槽两侧的壁板的外侧与下夹具板的底板铰接,所述底板上设置有凹槽,所述壁板的下部设置有与凹槽对应的凸块。
【技术特征摘要】
1.一种塑料片拉伸试验机的片材夹具,其特征在于,包括夹具本体,所述夹具本体的两端设置有与拉伸试验机的拉伸试台相连的连接轴,所述夹具本体包括上夹具板、下夹具板,所述上夹具板下部设置有插接孔,所述下夹具板上设置有与插接孔对应的插接板,所述上夹具板、下夹具板上表面设置有与试件对应的盲槽,所述盲槽的两端呈外宽内窄设置,宽部与窄部之间设置有向内收缩对称的拉力传递斜面,所述下夹具板的拉力传递斜面与窄部盲槽两侧的壁板的外侧与下夹具板的底板铰接,所述底板上设置有凹槽,所述壁板的下部设置有与凹槽对应的凸块。2.根据权利要求1所述的一种塑料片拉伸试验机的片材夹具,其特征在于,所述盲槽的内轮廓与试件要...
【专利技术属性】
技术研发人员:田钟涛,陈平旭,
申请(专利权)人:东莞市明聚塑胶有限公司,
类型:新型
国别省市:广东,44
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