CN2880367Y

CN2880367Y - Cutter wear and tear auto-alarming device

Info

Publication number: CN2880367Y
Application number: CN 200620040062
Authority: CN
Inventors: 何凤琴; 王丽慧; 林军
Original assignee: Shanghai Normal University
Current assignee: Shanghai Normal University; University of Shanghai for Science and Technology
Priority date: 2006-03-09
Filing date: 2006-03-09
Publication date: 2007-03-21
Anticipated expiration: 2016-03-09

Abstract

The utility model discloses an auto-alarm device for blade wearing, and the device consists of a sensor detection circuit, an A/D conversion circuit, a MCU control circuit, a display circuit, an alarm circuit and a cold-end temperature compensation circuit. The circuits are connected in turn. Main part of the MCU control circuit is 89C52, main part of the A/D conversion circuit is ADC0809, main part of the cold-end temperature compensation circuit is an ambient temperature sensor AD590 and a differential amplifier AD620, and the blade temperature detection system is a nickel-chromium nickel-silicon K-type thermocouple. The sensor detection circuit and the cold-end temperature compensation circuit of the MCU control circuit are used as signal source of the input of the two analog signals of ADC0809, the digital signal converted by ADC0809 is used as input of the MCU, and the display circuit and the alarm circuit are output circuits of the MCU.

Description

A kind of tool wear autoalarm

Technical field

The utility model relates to a kind of tool wear autoalarm, belongs to lathe tools and accessory class.

Background technology

Lathe tools are requisite important components in the metal cutting processing, and the cutter of all metal processing usefulness all can be worn inevitably at present.In order to improve the service life of cutter,, more be to be placed in the wear-resisting research and development that strengthen the cutter composition material except on searching tool wear rule and theoretical algorithm, having done many researchs.

Along with the prosperity and development of processing manufacturing industry, increasing Digit Control Machine Tool, machining center are used, and kind, the quality requirement to process tool is also more and more higher simultaneously, and in working angles, the energy that is consumed during cutting almost all changes heat in metal cutting into.A large amount of heat in metal cuttings raises the cutting region temperature, will directly influence the coefficient of friction on the cutter rake face, formation and disappearance, the wearing and tearing of cutter and cutting ability, workpiece machining accuracy and the machined surface quality etc. of workpiece material of built-up edge like this.

In automated production, press for the tool wear problem of reporting to the police automatically that solves, we have designed the automatic alarm control system of a kind of cutter, it can monitor the temperature of production line cutter rake face in real time, when reaching warning line, temperature just reports to the police, with prompting operation person's tool changing or take other measures, can improve the service life of cutter and the crudy of workpiece greatly like this, guarantee ordinary production, for save cost and boost productivity, the quality of production contributes.As seen the relation of the wearing and tearing of cutting temperature and cutter is very close, and the fierce more cutter temperature of wearing and tearing is high more.

Therefore, the inventor thinks: if can control intensification in the tool grinding process effectively, be very useful to the service life of improving cutter undoubtedly.

The utility model content

The purpose of the present utility model: be intended to propose before a kind of timing monitoring production line cutter when temperature reaches the warning temperature, just to report to the police automatically, with prompting operation person's tool changing or take other measures to the temperature of face.So both can improve the service life of cutter and the crudy of workpiece greatly, and guarantee to produce and normally carry out, can save production cost and enhance productivity again simultaneously.

This tool wear autoalarm is characterized in that: this device is connected and composed in regular turn by the circuit of sensor detection circuit, A/D change-over circuit, single chip machine controlling circuit, display circuit, warning circuit, cold-junction compensation circuit; The critical piece of described single chip machine controlling circuit is 89C52, the critical piece of A/D change-over circuit is ADC0809, the critical piece of cold-junction compensation circuit is temperature sensor AD590 and difference amplifier AD620, and the cutter system for detecting temperature is one nickel chromium triangle-nisiloy K type thermocouple sensor; Wherein the critical piece sensor detection circuit of single chip machine controlling circuit and cold-junction compensation circuit are as the signal source of the two-way input end of analog signal of ADC0809, the data signal that ADC0809 changes is as the input signal of single-chip microcomputer, and display circuit and warning circuit are as the output circuit of single-chip microcomputer.

This tool wear autoalarm according to above technical scheme proposition, owing to adopted monolithic processor controlled combinational circuit, and going out the alarm and the display screen of output by circuit, the actual temperature in the time of both can showing Tool in Cutting in real time can be reported to the police by buzzer again simultaneously.Therefore for the quality of service life of improving cutter and tool member, technical guarantee is provided.

Description of drawings

Accompanying drawing 1 is a tool wear autoalarm structural representation;

Accompanying drawing 2 is signal condition figure;

Accompanying drawing 3 is the film key circuit diagram;

Accompanying drawing 4 is display circuit figure;

Accompanying drawing 5 is buzzer alarm circuit figure.

The specific embodiment

This tool wear autoalarm that accompanying drawing provides is detected by sensor

The circuit of circuit, A/D change-over circuit, single chip machine controlling circuit, display circuit, warning circuit, cold-junction compensation circuit connects and composes in regular turn; The critical piece of described single chip machine controlling circuit is 89C52, the critical piece of A/D change-over circuit is ADC0809, the critical piece of the circuit of cold-junction compensation circuit is temperature sensor AD590 and difference amplifier AD620, and the cutter system for detecting temperature is one nickel chromium triangle-nisiloy K type thermocouple sensor; Wherein the critical piece sensor detection circuit of single chip machine controlling circuit and cold-junction compensation circuit are as the signal source of the two-way input end of analog signal of ADC0809, the data signal that ADC0809 changes is as the input signal of single-chip microcomputer, and display circuit and warning circuit are as the output circuit of single-chip microcomputer.

The critical piece of singlechip computer system is 89C52; The critical piece of A/D conversion is ADC0809; The critical piece of cold-junction compensation system is temperature sensor AD590 and difference amplifier AD620; The cutter system for detecting temperature is to adopt nickel chromium triangle-nisiloy K type thermocouple sensor; The keyboard operation system adopts 3 * 4 matrix form film keys; Display system is utilized 2 8255 and has been expanded 6 parallel I/O, adopts 4 common cathodes, 8 segment encode displays then.So can show 0～1020 ℃.

In practical design, nickel chromium triangle-nisiloy K type thermocouple sensor can be installed on cutter or the workpiece, the analog signal that thermocouple receives is sent ADC0809 through amplifying, the signal that ADC0809 changes send single-chip microcomputer, and the room temperature of AD590 measurement simultaneously signal also send single-chip microcomputer as the The Cold-Junction Compensation for Thermocouple signal.Single-chip microcomputer adopts the medium filtering mode that sampled signal is carried out filtering, send display to show then, and compare with the critical alarm temperature value that presets, if sampled value than critical alarm temperature height, single-chip microcomputer just drives alarm equipment alarm.

The workman both can understand the real time temperature of cutter by display, thereby understood the state of wear of cutter indirectly; The technical staff also can come problem analysis with the relation curve of the temperature and time of storing; Certainly, also can be, and specification requirement takes to change new cutter or temporary transient shut-down according to the buzzer warning temperature of setting, restart when the work cutter for the treatment of drops to normal optimum working temperature and carry out following process.

Claims

1, a kind of tool wear autoalarm is characterized in that: this device is connected and composed in regular turn by the circuit of sensor detection circuit, A/D change-over circuit, single chip machine controlling circuit, display circuit, warning circuit, cold-junction compensation circuit; The critical piece of described single chip machine controlling circuit is 89C52, the critical piece of A/D change-over circuit is ADC0809, the critical piece of the circuit of cold-junction compensation circuit is temperature sensor AD590 and difference amplifier AD620, and the cutter system for detecting temperature is one nickel chromium triangle-nisiloy K type thermocouple sensor; Wherein the critical piece sensor detection circuit of single chip machine controlling circuit and cold-junction compensation circuit are as the signal source of the two-way input end of analog signal of ADC0809, the data signal that ADC0809 changes is as the input signal of single-chip microcomputer, and display circuit and warning circuit are as the output circuit of single-chip microcomputer.