RU216025U1 - Wireless system for measuring mechanical vibrations of rotating workpieces - Google Patents

Abstract

The utility model relates to the field of measuring technology in metalworking and can be used to measure the mechanical vibrations of a rotating workpiece during turning. The device contains a microcontroller located in the housing and a module for measuring mechanical vibrations, a wireless communication module and a storage battery, correspondingly connected to it. In this case, the device is equipped with a charge controller connected to the storage battery, the housing is provided with a bracket attached to it, on which a microcontroller, a module for measuring mechanical vibrations, a wireless communication module, a charge controller and a storage battery are fixed, and a replaceable cover made with the possibility of attaching to the workpiece by means of clamp with a locking mechanism in the form of a worm gear. The use of the utility model makes it possible to expand the technological capabilities of the device. 3 ill.

Description

The utility model relates to measuring equipment in the field of mechanical engineering and can be used to measure and control mechanical vibrations of rotating workpieces during turning.

The measurement and control of mechanical vibrations in the processing process has a great deal of knowledge to improve production efficiency. The level of mechanical vibrations in the cutting zone can serve as an additional factor for optimizing the technological process, a method of indirect control of the state of the cutting tool and a criterion for its failure, and the basis for creating an MDC / MDA class system - a system for monitoring the operation of an enterprise's machine park. Therefore, the development of devices for measuring mechanical vibrations that occur in the cutting zone is an urgent task.

A known system for measuring and controlling mechanical vibrations of spindle units according to the patent of the Russian Federation No. 2454647 (publ. 27.06.2012 BI No. 18), containing a disk sleeve with a closed annular cavity, partially filled with a liquid-phase medium, an accelerometer mounted on a bracket in the area of the disk sleeve with the possibility removal of mechanical vibrations arising in a liquid-phase medium through a vibration transmission unit made in the form of a rod waveguide with a plate located in the cavity of the disk bushing with the possibility of interacting with the liquid-phase medium. The accelerometer with a rod waveguide is fixed in the bracket through a vibration isolating bushing. The signal from the accelerometer enters the information processing system, consisting of an amplifier, a filter, an ADC of a digital processing unit, where a sequence of control electrical pulses is generated, which is supplied to the actuator.

The objective of this technical solution is to measure and control the mechanical vibrations of the spindle units of metal-cutting machine tools under the influence of the cutting process and as a result of the operation of the spindle bearings.

Common features with the design of the device proposed by the authors is the presence of a vibration sensor - an accelerometer.

The disadvantages of this device known from the prior art include the complexity of the design and low information content of the recorded signal, which is determined by the remoteness of the disk sleeve from the cutting zone and the presence of an intermediate vibration transmission unit, which attenuates the transmitted signal and imposes its own vibrations, leading to distortion of the parameters of the measured signal.

Also known is a wireless system for measuring the temperature of thrust and thrust bearings according to the patent of the Russian Federation No. 2516918 (published on May 20, 2014 BI No. a device for transmitting measured values, as well as a device for receiving signals and transmitting them to the automatic control system and the power supply of the listed devices.

The objective of this technical solution is to increase the reliability of the temperature measurement system and data transmission to the automatic control system using wireless communication.

Common features with the design of the device proposed by the authors are the presence of a wireless device for transmitting measured values and a power supply.

The disadvantage of the known system is as follows.

The temperature measurement device, together with the corresponding device for transmitting measured values, has a power circuit with a coil designed to excite an EMF in it with an electromagnetic wave emitter, which can interfere with the transmitted signal of the wireless measurement system.

The closest in technical essence to the technical solution proposed by the authors is the driven tool system according to US 2019/0176287 A1, adopted by the authors as a prototype. It contains a driven tool and a ring surrounding a rotating shaft or rotating cutting tool of the driven tool. The sleeve contains at least one sensor capable of monitoring operating conditions in the vicinity of the cutting tool during the cutting operation, such as temperature and vibration. The system also includes a wireless transmitter associated with at least one sensor to transmit a signal for use by the processing center controller.

The objective of this technical solution is the implementation of local accurate monitoring of the operation of driven tools.

The disadvantages of this device known from the prior art include the fact that the specified placement of the system does not allow obtaining accurate measurements of mechanical vibrations from the cutting zone during processing, since the sensors located on the body of the driven tool system and further receive distorted signals of mechanical vibrations from the zone cutting due to the damping of the signals of mechanical vibrations by the elastic elements of the machine. Also, the system does not provide for charging the built-in rechargeable battery without removing it from the device due to the lack of a charge controller in the system.

Common features with the design of the device proposed by the authors are the presence of a measurement module, a wireless communication module, a microcontroller, a battery located in the case, and a clamp.

Unlike the prototype, the device proposed by the authors is additionally equipped with a charge controller, replaceable covers with the possibility of installing the device on the workpiece and fixing the device with a clamp, while the clamp is equipped with a locking mechanism in the form of a worm gear.

In particular cases, that is, in specific forms of implementation, the utility model is characterized by the following features:

a module for measuring mechanical vibrations, a wireless communication module, a microcontroller and a charge controller are made on the same printed circuit board;

the clamp is made in the form of two tape elements along the profile of the workpiece with the possibility of fixing the ends of the tape elements in the replaceable cover by means of countersunk screws;

replaceable covers are selected with an internal diameter corresponding to the diameter of the rotating workpiece being processed.

The objectives of the proposed technical solution is to register mechanical vibrations directly on a rotating workpiece.

The problem is solved by the fact that in a wireless device for measuring mechanical vibrations of rotating workpieces during turning, containing a module for measuring mechanical vibrations, a wireless communication module, a microcontroller, a battery located in the housing, and a clamp, unlike the prototype, the device is additionally equipped with a controller charge, replaceable covers with the possibility of installing the device on the workpiece and fastening the device by means of a clamp, while the clamp is equipped with a locking mechanism in the form of a worm gear.

A new set of features, as well as the presence of links between them, allows

additionally equipped with a charge controller - by monitoring the energy parameters of the device, thereby ensuring its reliable operation;

interchangeable covers with the ability to install the device on the workpiece - allows you to ensure a secure fit of the device to the surface of a rotating workpiece and thereby ensure the stability of the vibration signal measurement;

fixing the device by means of a clamp equipped with a locking mechanism in the form of a worm gear - allows you to ensure reliable fixation of the device on a rotating workpiece.

In particular cases, that is, in specific forms of execution, it allows due to:

execution on one printed circuit board of a module for measuring mechanical vibrations, a wireless communication module, a microcontroller and a charge controller - will allow you to place the device near the turning zone;

execution of the clamp in the form of two tape elements along the profile of the workpiece with the possibility of fixing the ends of the tape elements in the replaceable cover by means of countersunk screws - allows you to use one clamp for the required sizes of replaceable covers, ensuring reliable fixation of the device on a rotating workpiece;

selection of interchangeable covers with an internal diameter corresponding to the diameter of the workpiece being processed - allows you to ensure the installation and secure fit of the device on a rotating workpiece.

The utility model is illustrated by drawings, where

in fig. 1 - shows a diagram of the installation of a wireless device for measuring mechanical vibrations;

in fig. 2 is a general diagram of a wireless device for measuring mechanical vibrations of rotating workpieces;

in fig. 3 - the main elements of a wireless device for measuring mechanical vibrations of rotating workpieces.

A wireless device for measuring mechanical vibrations of rotating workpieces (1) contains a module for measuring mechanical vibrations (4), a microcontroller (5), a wireless communication module (6) and a charge controller (7) and a battery (10) located on the bracket (8) , in the housing (9). From below the case is closed by replaceable covers (11). Due to the fact that the replaceable covers (11) are chosen with an internal diameter corresponding to the diameter of the rotating workpiece (3) being processed, the measuring device (1) can be installed on rotating workpieces (3) of different sizes. Replaceable covers (11) are fixed to the body (9) with countersunk screws (12). The clamp, equipped with a locking mechanism in the form of a worm gear (13), secures the measuring device (1) to the rotating workpiece (3). A button (14) is provided to turn on the measuring device (1). After turning on the wireless measuring device, the signals from the mechanical vibration measurement module (4) are fed to the microcontroller (5) to transmit information to the operator panel (2) using the wireless communication module (6).

The proposed wireless device for measuring mechanical vibrations of rotating workpieces operates as follows.

A chuck is installed on the machine spindle, in which the workpiece is fixed (3). During processing in the cutting zone, mechanical vibrations of the workpiece are formed in a wide frequency range. These mechanical vibrations are transmitted from the workpiece (3) to the device for measuring mechanical vibrations (1) in the following way: from the workpiece (3), mechanical vibrations are transmitted to replaceable covers (11) further to the bracket (8), then to the mechanical vibration measurement module (4) . The signal is fed from the module (4) to the microcontroller (5), where it is encoded for transmission via radio channel to the operator panel (2). With an increase in tool wear, the level of mechanical vibrations in a certain frequency range changes in relation to the permissible level, which is visualized on the operator panel (2) and the decision to stop processing the workpiece (3) is made.

Thus, the proposed device allows you to control the mechanical vibrations of the workpiece during its processing on a lathe.

An analysis of the claimed technical solution for compliance with the conditions of patentability showed that the features indicated in the independent claim are essential and interconnected with the formation of a stable combination, unknown at the priority date from the prior art of the necessary features, sufficient to obtain the required synergistic (over total) technical result.

Thus, the above information testifies to the fulfillment of the following set of conditions when using the claimed technical solution:

the object embodying the claimed technical solution, in its implementation is intended for use in mechanical engineering, in particular in machine tool building and can be implemented as a wireless device for measuring mechanical vibrations of rotating workpieces;

for the claimed object in the form as it is described in the independent claim of the utility model, the possibility of its implementation using the above-described in the application materials known from the prior art on the priority date of the means and methods is confirmed;

an object embodying the claimed technical solution, in its implementation, is capable of achieving the technical result perceived by the applicant.

Therefore, the claimed object meets the requirements of the conditions of patentability "novelty", "inventive step" and "industrial applicability" under the current legislation.

Claims (1)

A wireless device for measuring mechanical vibrations of a rotating workpiece during turning, comprising a microcontroller located in the housing and a module for measuring mechanical vibrations, a wireless communication module and a battery, which are provided with a charge controller connected to the battery, mentioned the housing is provided with a bracket attached to it, on which a microcontroller, a module for measuring mechanical vibrations, a wireless communication module, a charge controller and a storage battery are fixed, and a replaceable cover made with the possibility of attaching to the workpiece by means of a clamp with a locking mechanism in the form of a worm gear.

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