Numerical control machine tool unclamping prevention method based on automatic control principle

Abstract

The invention provides a numerical control machine tool unclamping prevention method based on an automatic control principle, which comprises the following steps: monitoring state parameters of a tool in real time by using a sensor, and uploading the state parameters of the tool to a control system; the control system judges whether the working state of the cutter is normal according to the state parameters of the cutter; and when the working state of the cutter is abnormal, the cutting parameters are readjusted or emergency shutdown is carried out. Whether the working state of the tool is normal or not is judged according to the state parameters of the tool, maintenance or replacement can be conducted before the tool goes wrong, the accidental shutdown time caused by tool faults is shortened, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of numerical control machine tools, and in particular to a method for preventing tool striking of numerical control machine tools based on an automatic control principle. Background Art

[0002] With the development of computer, communication and network technology, manufacturing systems are also developing towards flexibility, intelligence and networking. As the core equipment of the manufacturing system, CNC machine tools have become an important trend in the future development of the manufacturing industry to realize their networked remote monitoring and operation. With the rapid development of science and technology, automatic control principle technology is increasingly widely used in CNC machining. Automatic control principle technology not only improves the efficiency of CNC machining, but also improves the precision and stability of machining to a certain extent. In the field of modern manufacturing industry, CNC tools have been widely used in production and processing. In the process of realizing high-speed, high-precision and high-efficiency machining automation, CNC equipment has higher and higher requirements for real-time control of the machining process. In production and processing, the wear of the tool itself will directly affect the quality of the workpiece being processed. In the field of CNC machining, the demand for high-precision, high-efficiency and high-stability machining is becoming increasingly prominent. CNC anti-knife technology can effectively improve the stability of the machining process and product quality, reduce production costs and meet market demand. In the process of CNC machining, common emergencies include tool breakage and accidents. These conditions may lead to risks such as equipment damage, machining interruption and even personal injury. Therefore, how to deal with these emergencies has become a key issue that must be solved in CNC tool-hitting prevention technology. Traditional tool-hitting prevention methods mainly rely on workers' monitoring, and only shut down the machine when tool-hitting occurs, making it difficult to prevent it in advance. Summary of the invention

[0003] To solve the above problems, the purpose of the present invention is to provide a method for preventing tool hitting of CNC machine tools based on automatic control principle.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] A method for preventing tool hitting of a CNC machine tool based on automatic control principle, comprising:

[0006] Step 1: Use sensors to monitor the tool status parameters in real time and upload the tool status parameters to the control system;

[0007] Step 2: The control system determines whether the working state of the tool is normal according to the state parameters of the tool;

[0008] Step 3: When the tool's working state is abnormal, readjust the cutting parameters or make an emergency stop.

[0009] Preferably, the tool status information includes cutting force, rotation speed, vibration and temperature.

[0010] Preferably, when the relationship between the cutting speed and the number of revolutions of the tool does not satisfy the formula: Vc=π*∮D*n / 1000, the working state of the tool becomes abnormal; wherein Vc represents the cutting speed of the tool, n represents the number of revolutions of the tool, and ∮D represents the diameter of the workpiece processed by the tool.

[0011] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0012] The present invention provides a method for preventing tool striking for CNC machine tools based on the principle of automatic control. Compared with the prior art, the present invention determines whether the working state of the tool is normal through the state parameters of the tool, and can perform maintenance or replacement before the tool has problems, thereby reducing unexpected downtime caused by tool failure and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0014] Figure 1 The automatic control principle block diagram provided by the present invention;

[0015] Figure 2 It is a principle diagram of the actuator provided by the present invention. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0018] To achieve the above object, the technical solution adopted by the present invention is:

[0019] See also Figure 1-2 , a CNC machine tool anti-knife hitting method based on automatic control principle, comprising:

[0020] Step 1: Use sensors to monitor tool status parameters in real time and upload the tool status parameters to a control system; the tool status information includes cutting force, rotation speed, vibration and temperature.

[0021] Step 2: The control system determines whether the working state of the tool is normal according to the state parameters of the tool;

[0022] Step 3: When the tool's working state is abnormal, readjust the cutting parameters or make an emergency stop.

[0023] In practical applications, the working principle of CNC anti-knife hitting technology is mainly based on sensors and control systems. It uses technical means such as sensors, signal processing and control systems to monitor the status of the tool and parameters such as cutting force in real time. During the processing process, the sensor monitors the status of the tool in real time, such as cutting force, temperature, vibration and other parameters. Once these parameters exceed the preset safety range, the sensor will immediately send a signal to the control system. The control system analyzes and processes the signal to determine whether the tool has problems such as wear and breakage, and takes corresponding measures according to the preset protection strategy, such as shutdown, tool replacement, etc., to avoid further losses. CNC anti-knife hitting technology is mainly based on real-time monitoring system. By installing sensors on key parts of the tool or machine tool, the cutting force, vibration, temperature and other parameters of the tool are collected in real time and transmitted to the control system. The control system processes and analyzes these data to determine whether the working state of the tool is normal. Once an abnormal situation is found, such as excessive cutting force or abnormal vibration, the control system will immediately issue a warning or automatically shut down to prevent further damage to the tool. CNC anti-knife hitting technology is implemented based on components such as sensors, control systems and actuators. The sensor is responsible for collecting tool status information in real time, such as cutting force, vibration, temperature, etc.; the control system processes the collected data to determine whether the tool is in normal working condition; once an abnormal situation is detected, the actuator will immediately implement corresponding measures, such as emergency shutdown, adjustment of cutting parameters, etc.

[0024] There are three types of CNC anti-tool-beating technologies: position control technology, speed control technology, and force control technology. Position control technology ensures the stability and accuracy of the machining process by precisely controlling the tool's motion trajectory; speed control technology adjusts the tool's rotation speed and feed speed according to machining requirements to achieve efficient cutting; and force control technology monitors and adjusts the cutting force in real time to avoid tool overload and breakage. These technologies work together to improve machining efficiency. The solution we adopted is: position control technology, which ensures the stability and accuracy of the machining process by precisely controlling the tool's motion trajectory.

[0025] like Figure 1-2As shown in the figure, the automatic control principle technology is a theoretical technology based on mathematical models, which uses computer technology to model, analyze and optimize the control system. This technology realizes automatic control of the system by real-time monitoring and adjustment of the input and output signals of the system. In CNC machining, the automatic control principle technology can monitor and adjust the machining process in real time to achieve dynamic control of the machining process. By monitoring the cutting force of the tool, the cutting parameters can be adjusted in time to avoid tool wear or workpiece breakage caused by excessive cutting force. At the same time, by real-time monitoring of the position and posture of the workpiece, the machining path and cutting depth can be automatically adjusted to ensure machining accuracy.

[0026] The following is a further description of the CNC machine tool anti-knife hitting method based on the automatic control principle of the present invention in conjunction with specific embodiments:

[0027] CNC anti-knife hitting technology is mainly based on the real-time monitoring system. By installing sensors on the key parts of the tool or machine tool, the cutting force, vibration, temperature and other parameters of the tool are collected in real time and transmitted to the control system. The control system processes and analyzes these data to determine whether the working state of the tool is normal. Once an abnormal situation is found, such as excessive cutting force or abnormal vibration, the control system will immediately issue a warning or automatically shut down to prevent further damage to the tool. CNC anti-knife hitting technology is based on components such as sensors, control systems and actuators. The sensor is responsible for real-time collection of tool status information, such as cutting force, vibration, temperature, etc.; the control system processes the collected data to determine whether the tool is in normal working condition; once an abnormal situation is detected, the actuator will immediately implement corresponding measures, such as emergency shutdown, adjustment of cutting parameters, etc.

[0028] Emergency stop mechanism braking: When tool breakage or abnormal vibration is detected, the control system will immediately trigger the emergency stop mechanism, cut off the power supply and stop the machine tool to avoid further damage. Safety range setting: The control system will preset a certain safety range, such as cutting force threshold, temperature upper limit, etc. Once the actual value exceeds these ranges, the system will automatically adjust the cutting parameters or shut down to prevent tool damage. Rapid recovery function: After the emergency is handled, the CNC anti-knife technology has the ability to quickly resume processing, reduce downtime, and improve production efficiency.

[0029] In addition, the CNC anti-knife system needs to be checked regularly: Regularly conduct comprehensive inspections of CNC machine tools and CNC anti-knife systems to ensure the normal operation of each component and timely discover and deal with potential problems. Equipment maintenance: According to equipment maintenance requirements, regularly replace worn parts, clean and lubricate, etc. to keep the equipment in the best working condition.

[0030] CNC anti-knife hitting technology will continue to develop in the direction of intelligence, high precision and high reliability. With the continuous development of artificial intelligence and big data technology, CNC anti-knife hitting technology is expected to achieve more accurate control and prediction, and further improve processing efficiency and quality. At the same time, as the manufacturing industry's requirements for efficient, green and sustainable development continue to increase, CNC anti-knife hitting technology will also play a greater role in energy conservation, emission reduction, resource utilization and other aspects. As an advanced machine tool processing auxiliary technology, CNC anti-knife hitting technology has significant advantages in improving processing efficiency. By accurately controlling the tool's motion trajectory and cutting force, preventing tool breakage, and optimizing cutting parameters, CNC anti-knife hitting technology can effectively improve processing speed, accuracy and stability.

[0031] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0032] The CNC anti-knife hitting method of the present invention can not only improve processing efficiency and reduce production costs, but also ensure product quality and stability, which is of great significance to the development of modern manufacturing industry. Taking a certain oil casing processing production line as an example, the CNC anti-knife hitting system can effectively avoid knife hitting, increase the threading yield by 0.5 percentage points, and reduce 50 scraps due to shoulders and single item instability every month. Calculated at 700 yuan per coupling raw material, the cost can be saved by 35,000 yuan per month; in addition, the tool consumption can be saved by about 30,000 yuan throughout the year, and the cumulative economic value created throughout the year is 450,000 yuan.

[0033] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A method for preventing tool hitting of CNC machine tools based on automatic control principle, characterized in that: include: Step 1: Use sensors to monitor the tool status parameters in real time and upload the tool status parameters to the control system; Step 2: The control system determines whether the working state of the tool is normal according to the state parameters of the tool; Step 3: When the tool's working state is abnormal, readjust the cutting parameters or make an emergency stop.

2. A method for preventing tool hitting of a CNC machine tool based on the automatic control principle as claimed in claim 1, characterized in that: The tool status information includes cutting speed, number of revolutions and temperature.

3. A method for preventing tool hitting of a CNC machine tool based on the automatic control principle as claimed in claim 2, characterized in that: When the relationship between the cutting speed and the number of revolutions of the tool does not satisfy the formula: Vc=π*∮D*n / 1000, the working state of the tool becomes abnormal; wherein Vc represents the cutting speed of the tool, n represents the number of revolutions of the tool, and ∮D represents the diameter of the workpiece processed by the tool.

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