KR20120064888A - Prediction system for life cycle of parts of machine tool and control method thereof - Google Patents

Prediction system for life cycle of parts of machine tool and control method thereof Download PDF

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Publication number
KR20120064888A
KR20120064888A KR1020100126147A KR20100126147A KR20120064888A KR 20120064888 A KR20120064888 A KR 20120064888A KR 1020100126147 A KR1020100126147 A KR 1020100126147A KR 20100126147 A KR20100126147 A KR 20100126147A KR 20120064888 A KR20120064888 A KR 20120064888A
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KR
South Korea
Prior art keywords
life
machine tool
unit
warning
machine
Prior art date
Application number
KR1020100126147A
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Korean (ko)
Inventor
이종언
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현대위아 주식회사
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Priority to KR1020100126147A priority Critical patent/KR20120064888A/en
Publication of KR20120064888A publication Critical patent/KR20120064888A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/09—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool
    • B23Q17/0995—Tool life management
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/406—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by monitoring or safety
    • G05B19/4065—Monitoring tool breakage, life or condition
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/23—Pc programming
    • G05B2219/23109—Configuration of display device, operator panel
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/35—Nc in input of data, input till input file format
    • G05B2219/35481—Display, panel
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/50—Machine tool, machine tool null till machine tool work handling
    • G05B2219/50185—Monitoring, detect failures, control of efficiency of machine, tool life

Abstract

PURPOSE: A method for estimating the service life of a part of a machine tool and a control method thereof are provided to estimate the residual service life of a part before the part has defects. CONSTITUTION: A method for estimating the service life of a part of a machine tool comprises a sensor unit(10), an input unit(20), a control unit(30), a display unit(40), and a warning unit(50). The sensor unit senses the movement and rotation distance of a machine tool. Information about each part of the machine tool is inputted to the input unit. The control unit receives the theoretical service life of each part from the input unit and calculates the residual service life of each part by adding a weighted value to the movement and rotation distance of the machine tool. The display unit displays the calculated residual service life on each part. The warning unit informs a user of the residual service life of each part.

Description

Prediction system for life cycle of parts of machine tool and control method

The present invention relates to a system for predicting the life of machine tool parts and a control method thereof. More specifically, the machine tool is in an inoperable state by predicting the remaining life in advance before a defect occurs in the machine tool part. The present invention relates to a life prediction system of a machine tool part and a control method thereof, which can prevent the product from being in the high temperature and thereby increase the production efficiency.

Machine tools used for the purpose of processing metals or non-metal materials into shapes and dimensions by means of various cutting or non-cutting methods or by using a suitable tool or for more precise machining on semi-materials are called machine tools. Among the machine tools described above, a machine tool in which chips are generated in a machining process is called a cutting machine tool, and a non-cut machine tool in which chips are not generated in a machining process is called a metal machine. The above cutting machine tools include lathes, milling machines, machining centers, drilling machines, boring machines, grinding machines, gear cutters, special processing machines, and the like. The metal forming machines include mechanical presses, hydraulic presses, and cutting machines. Bending machine, forging machine, drawing machine and the like.

Thanks to the trend of overall industry growth, automation and numerical control (NC) in the cutting field are also rapidly progressing. In recent years, multi-functional machining centers have emerged due to the complex combination of numerical control (NC) of machine tools, which has been divided into rotary lathe series and milling series, and the market has been supported by the wide demand of industrial sites. It is expanding rapidly.

As described above, when a machine tool has a problem with a component or signs of a problem during operation, the machine tool consults a service center or a specialized company for a defect of the component.

However, such a conventional method has a problem that the production efficiency is lowered because the machine tool is inoperable for a considerable time until the purchase, disassembly, assembly, commissioning, and operation of the corresponding parts.

It is an object of the present invention to solve the conventional problems as described above, by predicting the remaining life before the defect occurs in the machine tool components to be replaced in advance by making the machine tool in an inoperable state The present invention provides a system for predicting the life of machine tool parts and a method of controlling the same, which can prevent and increase production efficiency.

As a means for achieving the above object, the configuration of the present invention includes a sensor unit for detecting the machine movement and rotation distance, an input unit for inputting information on each component of the machine tool, and from the above input unit to each component. After inputting the theoretical life for the parts, the service life according to the factory life, assembly condition, lubrication condition, etc. is set in the theoretical life of each part, the weight is set, and the target life is determined. The control unit reads the weight of the machine movement and rotation distance, calculates the remaining service life, displays the remaining service life using the display unit, and gives a warning using the warning unit, the display unit for displaying the remaining service life, and the warning for the warning. It is preferable to include a part.

In the configuration of the present invention, it is preferable that the above control unit warns when the remaining life is less than or equal to a predetermined value.

In the configuration of the present invention, it is preferable that the above control unit warns when the remaining life is less than or equal to a predetermined value.

In the configuration of the present invention, it is preferable that the control unit sets the theoretical life to the design life determined at the manufacturing level.

As a means for achieving the above object, another configuration of the present invention comprises the steps of inputting the theoretical life for each part when the operation is started, and determining a target life by assigning weights according to the factory environment and usage conditions; Detecting the machine movement and rotation distance, weighting the machine movement and rotation distance, calculating remaining life and displaying the calculated remaining life, and determining whether the remaining life is below a certain value. And a step of warning and ending when the remaining life is below a certain value.

According to another configuration of the present invention, it is preferable that the above-described theoretical life is set to the design life determined at the manufacturing level.

According to another aspect of the present invention, it is preferable that the above-mentioned target life is aimed at use of the use condition divided into 15% acceleration, 15% deceleration, 20% constant speed, 30% cutting and 20% rest.

According to another aspect of the present invention, it is preferable that the above-mentioned remaining life is set to a value obtained by dividing the target life by the ratio of weight values.

The present invention has the effect of improving the production efficiency by preventing the machine tool from being inoperable by predicting the remaining life before the defect occurs in the machine tool parts so as to be replaced in advance.

1 is a block diagram of a life prediction system of a machine tool component according to an embodiment of the present invention.
2 is an operation flowchart of a control method of a life prediction system of a machine tool component according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings in order to describe in detail enough to enable those skilled in the art to easily carry out the present invention. . Other objects, features, and operational advantages, including the purpose, operation, and effect of the present invention will become more apparent from the description of the preferred embodiments.

For reference, the embodiments disclosed herein are only presented by selecting the most preferred embodiment in order to help those skilled in the art from the various possible examples, the technical spirit of the present invention is not necessarily limited or limited only by this embodiment Rather, various changes, additions, and changes are possible within the scope without departing from the spirit of the present invention, as well as other equivalent embodiments.

1 is a block diagram of a life prediction system of a machine tool component according to an embodiment of the present invention.

As shown in Figure 1, the configuration of the life prediction system of the machine tool component according to an embodiment of the present invention, the sensor unit 10 for detecting the machine movement and rotation distance, and each component of the machine tool The input unit 20 for inputting information about the input unit 20 receives the theoretical life for each component from the input unit 20, and sets usage conditions according to the factory environment, assembly conditions, lubrication conditions, etc. Set the weight and determine the target life, then read the machine movement and rotation distance from the sensor unit 10, weight the machine movement and rotation distance, calculate the remaining life, and use the display unit 40 to calculate the remaining life. It includes a control unit 30 for displaying the life and to warn using the warning unit 50, the display unit 40 for displaying the remaining life, and the warning unit 50 for warning.

The warning unit 50 may warn audibly and visually.

2 is an operation flowchart of a control method of a life prediction system of a machine tool component according to an embodiment of the present invention.

As shown in Figure 2, the configuration of the control method of the life prediction system of the machine tool parts according to an embodiment of the present invention, the step of starting the operation (S10) and input the theoretical life for each part Step S20, and setting the weight by setting the use conditions according to the factory environment, assembly conditions, lubrication conditions, etc. in the theoretical life of each of the parts (S30), and using the above weight to determine the target life Step (S40), detecting the machine movement and rotation distance (S50), weighting the machine movement and rotation distance (S60), calculating the remaining life (S70), and the remaining life Displaying (S80), determining whether the remaining life is below a predetermined value (S90), warning when the remaining life is below a predetermined value (S100), and terminating the operation (S110). It is made to include.

With the above configuration, the operation of the life prediction system of the machine tool component and the control method according to the embodiment of the present invention is as follows.

When the operation is started by applying power (S10), the control unit 30 receives the theoretical life for each component of the machine tool through the input unit 20 (S20). Each component described above corresponds to a main shaft, a feed shaft, a slide cover, a feed shaft ball screw, and the like. In addition, the theoretical lifetime described above means a design life determined at the manufacturing level. For example, for a feed shaft ball screw, the design life of 2000 km is set as the theoretical life during no load operation.

Next, the control unit 30 sets the use conditions according to the factory environment, assembly conditions, lubrication conditions, and the like to the theoretical life of each of the parts by assigning weights (S30), and confirms and stores the target lifespan (S40). .

        Item Acceleration deceleration Constant speed Cutting tissue 15% 15% 20% 30% 20% 100%
standard
Revolutions 0-> 3000 3000-> 0 3000 500 0 rpm Load operation cost 150 150 50 75 0 Standard Goal Life 1100 km

As shown in Table 1 above, in the case where the operating conditions are divided into 15% acceleration, 15% deceleration, 20% constant speed, 30% cutting and 20% rest, the load operation cost according to the number of rotations of the parts is The target life is 1100 km by setting acceleration 150, deceleration 150, constant speed 50, cutting 75, and pause 0, respectively.

Subsequently, the controller 30 detects the machine movement and the rotation distance through the sensor unit 10 (S50).

Next, the controller 30 weights the machine movement and the rotation distance by using the actual load operation cost in the field (S60), and calculates the residual life using the same (S70), and calculates the remaining life as described above. Display to the outside using the display unit 40 (S80). The remaining life is set to a value obtained by dividing the target life (1100 km) by the ratio of the weight sum.

Item
Acceleration deceleration Constant speed Cutting tissue 15% 15% 20% 30% 20% 100%
standard
Revolutions 0-> 3000 3000-> 0 3000 500 0 rpm Load operation cost 150 150 50 75 0 Standard Goal Life 1100Km
Scene Actual load operation cost 20% 20% ` 15% 35% 10% 100% weight 1.33 1.33 0.75 1.17 0 4.58 Remaining life 1100 / (4.58 / 4) = 960 km

As shown in Table 2 above, when the actual load operation ratio in the field is determined to be 20% acceleration, 20% deceleration, 15% constant speed, 35% cutting and 20% rest, each weight is calculated as follows.

-In case of acceleration

150 × 0.2 / (150 × 0.15) = 1.33

-In case of deceleration

150 × 0.2 / (150 × 0.15) = 1.33

-In case of constant speed

50 × 0.15 / (50 × 0.2) = 0.75

-For cutting

75 × 0.35 / (75 × 0.3) = 1.17

The sum of the weights according to the actual load operation ratio is 4.58, and the ratio of the weight sums for the four cases of acceleration, deceleration, constant speed, and cutting is 4.58 / 4 = 1.145.

Therefore, the remaining life is 9600 km, which is the target life (1100 km) divided by the ratio of the weight values (4.58 / 4 = 1.145).

The weight is varied according to the actual load operating cost at that time in the field, and thus the remaining life is also varied at an inconsistent rate. That is, as the sum of the weights increases, the ratio of the weight sum becomes larger, so that the remaining life displayed through the display unit 40 becomes smaller at a large rate. The remaining lifespan indicated by) becomes small at a small rate.

 Subsequently, the controller 30 determines whether the remaining life is less than or equal to a predetermined value (S90), and if the remaining life is less than or equal to a predetermined value, an alarm or visual warning is issued using the warning unit 50 (S100). The operation ends (S110).

10: sensor unit 20: input unit
30 control unit 40 display unit
50: warning unit

Claims (8)

Sensor unit for detecting the machine movement and rotation distance,
An input unit for inputting information on each part of the machine tool,
After receiving the theoretical life for each part from the input unit, setting the use conditions according to the factory life, assembly condition, lubrication condition, etc., to the theoretical life of each part, and setting the weight and determining the target life. A control unit that reads the machine movement and rotation distance from the machine, weights the machine movement and rotation distance, calculates the remaining life, displays the remaining life using the display unit, and warns using the warning unit;
A display unit for displaying the remaining life,
Life prediction system for machine tool parts, characterized in that comprising a warning for warning. The method of claim 1,
The control unit warns the life of the machine tool component, characterized in that for warning when the remaining life is less than a predetermined value. The method of claim 1,
Said control part sets the theoretical life to the design life determined by the manufacturing dimension, The lifetime prediction system of a machine tool component characterized by the above-mentioned. The method of claim 1,
The control unit, the life expectancy system of the machine tool component, characterized in that for setting the remaining life by a value obtained by dividing the target life by the ratio of the weight value. Entering the theoretical life for each part when the motion begins,
Determining the target life by assigning weights according to the plant environment and usage conditions;
Detecting machine movement and rotation distance;
Weighting the machine movement and rotational distance,
Calculating remaining life to display the calculated remaining life;
Determining whether the remaining life is below a certain value;
And a step of warning and terminating when the remaining life is less than a predetermined value. 6. The method of claim 5,
The above-described theoretical life is set to the design life determined at the manufacturing level. 6. The method of claim 5,
The above-mentioned target life is a control method for the life prediction system of a machine tool component, characterized in that the use conditions are divided into 15% acceleration, 15% deceleration, 20% constant speed, 30% cutting, and 20% rest. 6. The method of claim 5,
And the remaining life is set to a value obtained by dividing the target life by the ratio of the weight sum.
KR1020100126147A 2010-12-10 2010-12-10 Prediction system for life cycle of parts of machine tool and control method thereof KR20120064888A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104002195A (en) * 2014-05-05 2014-08-27 上海交通大学 Tool life prediction system based on energy
KR102092856B1 (en) * 2019-02-21 2020-04-23 (주)디비넥스트 Apparatus for monitoring a machine
CN113168161A (en) * 2018-07-24 2021-07-23 伊利诺斯工具制品有限公司 Method and apparatus for material preparation and analysis equipment using encoded information

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104002195A (en) * 2014-05-05 2014-08-27 上海交通大学 Tool life prediction system based on energy
CN113168161A (en) * 2018-07-24 2021-07-23 伊利诺斯工具制品有限公司 Method and apparatus for material preparation and analysis equipment using encoded information
KR102092856B1 (en) * 2019-02-21 2020-04-23 (주)디비넥스트 Apparatus for monitoring a machine

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