Rotary milling vibration measuring instrument

Abstract

The invention provides a rotary milling vibration measuring instrument, comprising a milling handle, a vibration sensor, a power supply system and a signal transmission system. The vibration sensor comprises a built-in IC piezoelectriccrystal acceleration sensor and a constant current source circuit; the signal transmission system collects signals outputted by the vibration sensor, stores data, encodes the data, transmits the encoded data by a wireless transmission mode, and receives, decodes and stores wireless signals; and the power supply system supplies electricity for the sensor in the milling handle and the circuit by adopting an electromagnetic induction mode. In the device, the vibration sensor is arranged in the milling handle to ensure that the milling handle itself has the function of testing the vibration signals, and the handle has simple structure and convenient manufacture. The inductive power supply system ensures that power supply is not affected by rotation of the handle. The wireless transmission mode ensures that a signal receiving end is properly far away from the cutting area.

Description

technical field [0001] The invention belongs to the field of metal cutting and is mainly used for measuring the vibration signal of the milling process. Background technique [0002] The rotary milling vibration measuring instrument is used to measure the vibration signal of the milling process. Generally speaking, the piezoelectric crystal acceleration sensor is used to measure the cutting vibration. The acceleration sensor is installed on the workpiece. See figure 1 . During milling, the milling cutter holder 14 is installed on the milling machine spindle 9 through the tapered surface, and the milling cutter 10 is installed on the milling cutter holder 14; the workpiece 13 to be cut is installed on the milling machine table 12 (generally connected by T-shaped bolts); vibration The sensor 11 (piezoelectric crystal type acceleration sensor) is installed on the workpiece 13 (installation methods include screw fixing, glue bonding and magnetic mounting seat, etc.). During mi...

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Problems solved by technology

[0004] Generally speaking, cutting vibration mainly refers to the vibration of the tool. With the relative movement of the tool and the workpiece, the distance between the vibration measurement point (that is, the installation point of the vibration sensor) and the cutting area (the cutting area is the main vibration source) of the above method is Changing, and the distance is long, the vibration signal includes the vibration of the workpiece. If the shape of the workpiece, especially the quality, changes, even if the same machine tool, tool and cutting amount are used, the measured vibration signal is different; In addition, The contact stiffness between the workpiece and the milling machine table after clamping also affects the vibration signal

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