Cutting force measuring device

Abstract

The invention relates to a cutting force measuring device, and belongs to the technical field of new energy and cutting force monitoring. The cutting force measuring device is composed of a machine shell, a ring frame, a ring plate, a ring cover, an exciter, a limiting block, a sensor, a circuit board and transducers, wherein a rolling body of the exciter is a magnetic ball or a magnetic column; the transducers are formed by bonding coupling sheets and piezoelectric sheets; the sensor is arranged on a drill bit, a clamp or a main shaft, and the circuit board is arranged on the ring cover; the machine shell is installed on the main shaft, the ring cover is installed at the end of an outer ring groove of the machine shell, a protruding ring of the ring cover is arranged in the outer ring groove, and the transducer, the ring frame, the ring plate and the transducer are sequentially connected between the protruding ring and the bottom wall of the outer ring groove in a pressing mode; and the exciter is mounted in an inner ring groove of the ring frame, and the coupling sheets of the transducers are made of a ferromagnetic material. When the main shaft rotates, the transducers and the exciter rotate relatively, the exciter forces the transducers to generate reciprocating axial bending deformation and convert mechanical energy into electric energy, the electric energy is supplied to the sensor after being processed by a conversion circuit, and the sensor obtains relevant cutting force parameters in real time and then transmits the relevant cutting force parameters through a transmitting unit.

Description

technical field [0001] The invention belongs to the technical field of cutting force monitoring and new energy, and in particular relates to a cutting force measuring device, which is used for on-line state monitoring of the cutting force of rotary metal processing tools such as drill bits. Background technique [0002] Drilling is one of the most commonly used metal cutting processes. This process is usually carried out under semi-closed conditions, which has many problems such as difficult heat dissipation, difficult chip removal, easy to scratch the hole surface, low machining accuracy, and serious drill wear. During drilling, the chisel edge and the main cutting edge of the tool work at the same time, respectively generating axial force and torque, which directly affect the stability of the drilling process, the life of the tool and the processing effect of the workpiece. Therefore, in order to effectively improve the life of the drill bit, the surface quality of the pro...

AI Technical Summary

Problems solved by technology

However, since the drill bit is mostly in a rotating state during processing, the power supply problem of the monitoring system has not been well resolved: the wire power supply is inconvenient and unsafe, and the battery power supply needs to be replaced frequently. The force of machining the workpiece reverses the cutting force on the drill bit. This kind of measurement error is large and is not suitable for real-time online monitoring in the production process, which seriously restricts the popularization and application of online monitoring technology of cutting force in drilling.

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