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首页> 外文期刊>Conference Papers in Science >A New Compression-Torsion-Tribometer with Scalable Contact Pressure for Characterization of Tool Wear during Plastic Deformation
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A New Compression-Torsion-Tribometer with Scalable Contact Pressure for Characterization of Tool Wear during Plastic Deformation

机译：一种新型的具有可扩展接触压力的压扭摩擦仪，用于表征塑性变形过程中的工具磨损

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A contact pressure which reaches up to ten times the yield stress of the workpiece material is characteristic for cold extrusion processes. Common tests for friction and wear are limited to rather low contact pressures. Thus, the aim of this paper is to present a new compression-torsion-tribometer which is able to scale the contact pressure to a multiple of the yield stress of the workpiece. In order to enable a contact pressure that greatly exceeds the yield stress of the workpiece material, the workpiece specimen is encapsulated laterally. As main parameters, contact pressure, glide length, and relative velocity can be adjusted independently, thus allowing for multiple load cycles. The resulting torque is measured continuously as an indicator for wear. Afterwards wear can be also quantified by examination of surfaces. Hence, the developed setup enables a comparison of tool surfaces and coatings and a characterization of wear behaviour under high contact pressure.
机译：对于冷挤压工艺来说，接触压力最高达工件材料屈服应力的十倍。常见的摩擦和磨损测试仅限于相当低的接触压力。因此，本文的目的是提出一种新的压扭摩擦计，该压扭摩擦计能够将接触压力定标为工件屈服应力的倍数。为了使接触压力大大超过工件材料的屈服应力，将工件样品横向封装。作为主要参数，接触压力，滑行长度和相对速度可以独立调整，因此允许多个负载循环。连续测量得到的扭矩作为磨损的指标。之后，磨损也可以通过检查表面来量化。因此，开发的设置可以比较工具表面和涂层，以及表征在高接触压力下的磨损行为。

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