Built-in force sensor capable of directly measuring force

Abstract

The invention discloses a built-in force sensor capable of directly measuring force. The built-in force sensor comprises a first pressing sleeve, a pressure sensor component, a second pressing sleeve, a pressing head and a fixing device; a first cylindrical inner hole is formed in one end of the first pressing sleeve, the pressure sensor component is installed in the first cylindrical inner hole and comprises a stress end, a force transmission rod and a force measuring end which are connected sequentially, a second cylindrical inner hole is formed in the free end of the force measuring end, a strain gauge is arranged on the bottom face of the inner side of the force measuring end, and a third cylindrical inner hole is formed in the free end of the stress end; one end of the second pressing sleeve makes contact with the fixed end face of the force measuring end, the outer side of the other end of the second pressing sleeve is provided with a shoulder which is fixedly connected with the second pressing sleeve through a screw, and the pressure sensor component is fixed in the first pressing sleeve; the pressing head is fixed in the third cylindrical inner hole through the fixing device. According to the built-in force sensor, the core part of the sensor can be arranged in a numerical control press, the measured force is directly detected, the influences of the outside environment are reduced, and the functions of built-in installation, high precision and convenient installation are achieved.

Description

technical field [0001] The invention relates to a force sensor, in particular to a built-in force sensor which is installed inside a numerical control press and can directly measure force. Background technique [0002] The force sensor is a device used to convert the magnitude of force into a corresponding electrical signal. It is mainly composed of three parts: 1. Elastomer (common materials are aluminum alloy, alloy steel and stainless steel); 2. Conversion element (most The common one is the resistance strain gauge); 3. The circuit part (generally there are enameled wires, and the strain gauges are connected to form a bridge for measuring the change of resistance value). According to different functions and principles, there are five main types of force sensors: (1) The measured force causes the elastic body (such as spring, beam, bellows, diaphragm, etc.) to produce a corresponding displacement, and the force signal is obtained through the measurement of the displacement...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the problem that the force sensor used in the numerical control press in the prior art is not high in precision because it is easily affected by the external environment, and to provide a built-in force sensor that can directly measure the force, and the core part of the sensor can be It is built into the CNC press and directly measures the load force, reducing the influence of intermediate links and the external environment, realizing the functions of built-in installation, direct force measurement, high precision, convenient installation and easy disassembly

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