Device for measuring thermal elongation of ram based on material thermal elongation difference characteristics

Abstract

The invention provides a device for measuring thermal elongation of a ram based on a texture thermal elongation difference property. According to the device, a bonding point of a ram shell and a screw rod set is arranged at the fixed rear end of the ram. The device is structurally characterized in that the rear end of the ram is joined with the rear end of an aluminum pipe; the aluminum pipe and the front end of a steel rod are joined on a fixed part of the aluminum pipe and the steel rod; the rear end of the steel rod is connected with a measuring device; a design is that the thermal expansion coefficient of aluminum is two times as much as that of steel; when the temperature is changed, the ram shell extends for one thermal elongation unit along the positive direction, the aluminum pipe extends for two times along the positive direction and the steel rod is moved for two times along the positive direction; however, the steel rod extends for one thermal elongation unit along the negative direction and the sum of the thermal elongation unit and the thermal elongation of the ram is equal to the thermal elongation amount of the aluminum pipe; a reference object of the thermal displacement of the ram is compounded; and a numerical value collected by the measuring device at the rear end of the steel rod is the thermal displacement of the ram, so that expensive mark post invar steel is replaced and the production cost of equipment is reduced obviously.

Description

technical field [0001] The invention relates to the manufacture of mechanical equipment, a ram used for large-scale gantry boring and milling machines and large-scale vertical turning and milling processing centers. The reference structure of the ram is made by using the difference in thermal expansion coefficient between steel and aluminum, and the method for measuring the thermal deformation of the ram device. Background technique [0002] The processing of parts on large gantry boring and milling machines and large vertical turning and milling machining centers is complex and the processing cycle is long. Due to the thermal expansion and contraction of metals, the high-speed operation of the milling spindle inside the ram during machine tool processing generates heat and the processed parts and tools The heat generated during the cutting process causes the ram to elongate. Under different working conditions, the actual thermal elongation of the ram is different from the v...

AI Technical Summary

Problems solved by technology

The disadvantage is that the cost of invar as a benchmark is high, and its thermal expansion coefficient is not absolute zero under different conditions, and the use of invar will increase the cost of equipment

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