CN113752439A - Tire mold pattern block cleaning method - Google Patents
Tire mold pattern block cleaning method Download PDFInfo
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- CN113752439A CN113752439A CN202111095054.7A CN202111095054A CN113752439A CN 113752439 A CN113752439 A CN 113752439A CN 202111095054 A CN202111095054 A CN 202111095054A CN 113752439 A CN113752439 A CN 113752439A
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- 238000004140 cleaning Methods 0.000 title claims abstract description 98
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000012545 processing Methods 0.000 claims abstract description 10
- 238000005259 measurement Methods 0.000 claims description 14
- 230000000630 rising effect Effects 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/70—Maintenance
- B29C33/72—Cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/0035—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like
- B08B7/0042—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like by laser
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2111/00—Details relating to CAD techniques
- G06F2111/10—Numerical modelling
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- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a tire mold pattern block cleaning method, which belongs to the field of tire mold cleaning and comprises the following steps: unifying a measuring system coordinate system and a cleaning equipment coordinate system; scanning the caliber of the pattern block and the inside of the cavity by using a measuring sensor along the vertical surface direction of the pattern block to obtain point cloud data; extracting data representing the caliber of the pattern block from the point cloud data; completing missing values of the cavity surface of the pattern block cavity, which cannot be measured due to the blockage of the pattern ribs, by interpolation fitting of a spline curve, simultaneously obtaining a curve profile of the cavity surface, scanning along the thickness direction of the pattern block, and obtaining point cloud data; acquiring the radian and the diameter of the pattern block caliber arc and the starting point position of the pattern block caliber; according to the obtained data, the angle and the moving position of the cleaning laser head which need to swing when the pattern block is cleaned are calculated, and the corresponding processing code is generated.
Description
Technical Field
The invention relates to the field of tire mold cleaning, in particular to a tire mold pattern block cleaning method.
Background
Tire mould surface can constantly adhere to on vulcanization in-process surface and glue filth such as dirt, greasy dirt, consequently need suitably wash the mould surface, get rid of the filth, in order to ensure the product quality who lasts production, when carrying out the decorative pattern piece washing at present, mainly adopt dry ice, sandblast, laser, if use self-cleaning's mode, for guaranteeing to wash and being close normal direction, need input the concrete appearance data of decorative pattern piece or leading-in with the decorative pattern piece model, nevertheless measure more loaded down with trivial details or the decorative pattern piece model that needs to correspond, the cleaning efficiency has been influenced.
In view of the problems in the prior art, the invention designs and manufactures a tire mold block cleaning method by combining years of design and use experience of related fields and assisting with over-strong professional knowledge, so as to overcome the defects.
Disclosure of Invention
For the problems in the prior art, the method for cleaning the pattern blocks of the tire mold can realize automatic measurement of the pattern block appearance and automatic planning of a cleaning path, thereby improving the cleaning efficiency and the cleaning quality.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a cleaning method for a tire mold pattern block comprises the following steps:
calibrating the position parameters of the measuring system, adjusting the measuring coordinate system through a program, and unifying the measuring system coordinate system and the cleaning equipment coordinate system;
scanning the caliber of the pattern block and the inside of the cavity by using a measuring sensor along the vertical surface direction of the pattern block to obtain point cloud data;
the point cloud data of the pattern blocks are compared symmetrically by using the centers by utilizing the symmetry of the vertical surface directions of the pattern blocks, high points at the same positions are replaced by low points, and a part of raised ribs are removed;
extracting position points representing the caliber of the pattern block from the point cloud data so as to calculate the width of the caliber of the pattern block and the lowest point information of the caliber of the pattern block;
removing aperture position data of the pattern block from the point cloud data, taking the residual data as position data of the pattern block cavity, completing missing values of the cavity surface of the pattern block cavity which cannot be measured due to the blockage of the pattern ribs by interpolation fitting of a spline curve, and simultaneously obtaining a curve profile of the cavity surface, wherein the curve profile is a multi-section fitting curve formula;
scanning along the thickness direction of the pattern blocks to obtain point cloud data;
acquiring the radian and the diameter of the aperture arc of the pattern block and the position of an initial point of the aperture of the pattern block according to the characteristic that the aperture curve in the thickness direction of the pattern block is a standard circle;
and calculating the angle and the moving position of the cleaning laser head which need to swing when cleaning the pattern block according to the obtained curve profile of the cavity surface, the information of the caliber width and the lowest point of the pattern block, the radian and the diameter of the caliber of the pattern block and the characteristic that the action direction of the cleaning medium is close to the normal direction of the cleaning surface, and generating a corresponding processing code for an automatic cleaning device.
Preferably, in order to avoid excessive loss of the cavity data caused by too long ribs, the measuring position is replaced to measure data at least twice.
Preferably, after the multiple measurement data are respectively subjected to symmetrical comparison, the multiple measurement data are compared, the lowest point cloud data is taken at the same position, the raised flower rib data are further eliminated, and the final measurement data are the data obtained after the multiple measurement data are symmetrical and compared.
Preferably, after removing a part of convex ribs, removing the rib data with the rising trend by calculating the variation trend of the point cloud data of the side pattern block by utilizing the characteristic that the cavity on one side of the vertical face direction of the pattern block is in the descending trend; meanwhile, by utilizing the characteristic that the other side cavity in the vertical face direction of the pattern block is in the rising trend, the change trend of the point cloud data of the pattern block on the side is calculated, the air hole data in the falling trend is removed, and finally, after the pattern block is compared symmetrically, the interference item of the pattern block cavity is removed.
Preferably, the specific method for calculating the swing angle and the moving position of the cleaning laser head during cleaning is as follows:
the cleaning laser head cleans along the pattern block thickness direction, and needs to calculate and obtain the following information:
(1) according to a curve formula fitted along the vertical face direction of the pattern block, taking a fixed line width as a chord length, starting from the starting point of the cavity, dividing the curve of the cavity according to the chord length, calculating the intersection point of the central line of a chord line segment and the curve of the cavity, and determining the angle of a swing axis A of a cleaning laser head and the position of an XYZ axis during cleaning each segment according to the position and the angle of the intersection point;
(2) after the angle of the swing axis A and the XYZ axis position are determined, a processing path is generated by circular interpolation according to the information of the starting point, the arc length and the diameter of the aperture of the pattern block, and the cleaning head is enabled to clean according to the path.
Preferably, the specific method for calculating the swing angle and the moving position of the cleaning laser head during cleaning is as follows:
the cleaning laser head cleans along the vertical face direction of the pattern block, and the following information needs to be obtained by calculation:
(1) according to the information of the starting point, the arc length and the diameter of the pattern block caliber, taking the fixed line width as the chord length, starting from the caliber starting point, dividing a caliber curve and the like according to the chord length, simultaneously calculating the intersection point of the central line of a chord line segment and the caliber curve, and determining the angle of a swing axis B of a cleaning laser head and the position of an XYZ axis during cleaning each segment according to the position and the angle of the intersection point;
(2) after the angle of the swing axis B and the XYZ axis position are determined, a machining path is generated by circular interpolation according to curve information of the cavity and information of the cleaning height, and the cleaning head is cleaned according to the path.
Preferably, after the first cleaning is finished, the angle of the swing shaft of the cleaning laser head is changed, 5-10 degrees are added on the basis of the original angle, the second cleaning is carried out, the angle of the swing shaft of the cleaning laser head is changed, 5-10 degrees are reduced on the basis of the original angle, the third cleaning is carried out in the opposite direction, and the situation that the side face of the patterned rib can be thoroughly cleaned is guaranteed.
Preferably, in the measurement coordinate system, the X axis corresponds to the width direction of the pattern block, the Y axis corresponds to the elevation height direction of the pattern block, and the Z axis corresponds to the thickness direction of the pattern block.
The invention has the advantages that:
1. according to the invention, the appearance data of the pattern block can be obtained through the measuring sensor, and the processing is carried out according to the appearance data, so that the problems of poor pattern block cleaning effect and obvious color difference can be avoided.
2. Compare with the manual measurement decorative pattern piece bore, the relevant data of die cavity face, then carry out self-cleaning, can reduce artificial work load, avoid artificial measuring error and the error that causes simultaneously.
Drawings
FIG. 1 is a schematic view of the vertical-plane directional coordinates of the pattern block of the present invention;
FIG. 2 is a schematic diagram of the thickness direction coordinates of the blocks of the present invention;
figure 3 is a schematic view of the block of the present invention.
In the figure: 1-cavity and 2-caliber.
Detailed Description
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1 to 3, a tire mold block cleaning method includes the steps of:
calibrating position parameters of a measuring system, adjusting the measuring coordinate system through a program, and unifying the measuring system coordinate system and a cleaning equipment coordinate system, wherein an X axis in the measuring coordinate system preferably corresponds to the width direction of the pattern block, a Y axis preferably corresponds to the elevation height direction of the pattern block, and a Z axis preferably corresponds to the thickness direction of the pattern block;
scanning the caliber 2 of the pattern block and the inside of the cavity 1 by using a measuring sensor along the vertical face direction of the pattern block to obtain point cloud data, and measuring data at least twice, preferably three times, by replacing a measuring position in order to avoid excessive data loss of the cavity 1 caused by overlong pattern ribs;
the method comprises the steps that point cloud data of a pattern block are symmetrically compared by using the symmetry of the pattern block in the vertical face direction, high points at the same position are replaced by low points, a part of raised ribs are removed, multiple times of measurement data are compared after being symmetrically compared respectively, the lowest point cloud data at the same position are taken, the raised rib data are further removed, and the final measurement data are data obtained after the multiple times of measurement data are symmetrical and compared; after removing a part of raised ribs, removing the rib data with the rising trend by calculating the change trend of the point cloud data of the pattern blocks on one side of the vertical face direction of the pattern blocks by utilizing the characteristic that the cavity 1 on one side of the vertical face direction of the pattern blocks is in the descending trend; meanwhile, by utilizing the characteristic that the other side cavity 1 in the vertical face direction of the pattern block is in the rising trend, the change trend of the point cloud data of the pattern block on the side is calculated, the air hole data in the falling trend is removed, and finally, after the pattern block is compared symmetrically, the interference item of the pattern block cavity 1 is removed.
Extracting a position point representing the caliber 2 of the pattern block from the point cloud data, thereby calculating the width a of the caliber 2 of the pattern block and the lowest point information of the caliber 2 of the pattern block;
removing the position data of the aperture 2 of the pattern block from the point cloud data, taking the residual data as the position data of the pattern block cavity 1, completing missing values of the cavity surface of the pattern block cavity 1 which cannot be measured due to the blockage of the pattern ribs through interpolation fitting of a spline curve, and simultaneously obtaining a curve profile of the cavity surface, wherein the curve profile is a multi-section fitting curve formula;
scanning along the thickness direction of the pattern blocks to obtain point cloud data;
acquiring the radian and the diameter of the arc of the pattern block caliber 2 and the initial point position of the pattern block caliber 2 according to the characteristic that the curve of the pattern block caliber 2 in the thickness direction is a standard circle;
according to the obtained curve profile of the cavity surface, the width and the lowest point information of the pattern block caliber 2, the radian and the diameter of the pattern block caliber 2 and the characteristic that the action direction of a cleaning medium is close to the normal direction of the cleaning surface, the angle and the moving position of a cleaning laser head which need to swing when the pattern block is cleaned are calculated, and a corresponding processing code is generated for the automatic cleaning equipment to use.
The above sequence of steps may be adjusted in different embodiments, for example, in the scanning sequence of the block in the elevation direction and thickness direction, without affecting the actual measurement, while satisfying the normal measurement requirements.
The specific method for calculating the swinging angle and the moving position of the cleaning laser head during cleaning comprises the following steps:
if the cleaning laser head cleans along the thickness direction of the pattern block, the following information needs to be obtained by calculation:
(1) according to a curve formula fitted along the vertical face direction of the pattern block, taking a fixed line width as a chord length, starting from the starting point of the cavity 1, dividing the curve of the cavity 1 according to the chord length, meanwhile, calculating the intersection point of the central line of a chord line segment and the curve of the cavity 1, and determining the angle of a swing axis A of a cleaning laser head and the position of an XYZ axis during cleaning of each segment according to the position and the angle of the intersection point;
(2) after the angle of a swing shaft A and the XYZ axial position are determined, generating a processing path by utilizing circular interpolation according to the information of the starting point, the arc length and the diameter of the pattern block caliber 2, and enabling a cleaning head to clean according to the path;
(3) after the first cleaning is finished, changing the angle of the A shaft, increasing 5-10 degrees on the basis of the original angle, carrying out second cleaning, changing the angle of the A shaft, reducing 5-10 degrees on the basis of the original angle, carrying out third cleaning from the opposite direction, and ensuring that the side face of the patterned rib can be thoroughly cleaned.
If the cleaning laser head cleans along the vertical face direction of the pattern block, the following information needs to be obtained by calculation:
(1) according to the information of the starting point, the arc length and the diameter of the pattern block caliber 2, the fixed line width is taken as the chord length, the caliber 2 curve and the like are divided according to the chord length from the starting point of the caliber 2, meanwhile, the intersection point of the central line of the chord line segment and the caliber 2 curve is calculated, and the angle of the swing axis B of the cleaning laser head and the XYZ axis position during cleaning of each segment are determined according to the intersection point position and the angle;
(2) after the angle of the swing axis B and the XYZ axis position are determined, generating a processing path by using circular interpolation according to curve information of the cavity 1 and information of cleaning height, and cleaning the cleaning head according to the path;
(3) after the first cleaning is finished, changing the angle of the B axis, increasing 5-10 degrees on the basis of the original angle, carrying out second cleaning, changing the angle of the B axis, reducing 5-10 degrees on the basis of the original angle, carrying out third cleaning from the opposite direction, and ensuring that the side face of the patterned rib can be thoroughly cleaned.
According to the method, the appearance data of the pattern block can be obtained through the measuring sensor, processing is carried out according to the appearance data, the problems that the pattern block is poor in cleaning effect and obvious in color difference can be solved, compared with the method that data related to the caliber 2 and the cavity surface of the pattern block are manually measured, and then automatic cleaning is carried out, manual workload can be reduced, and meanwhile measurement errors and errors caused by manual work are avoided.
It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should also be understood that various alterations, modifications and/or variations can be made to the present invention by those skilled in the art after reading the technical content of the present invention, and all such equivalents fall within the protective scope defined by the claims of the present application.
Claims (8)
1. A cleaning method for pattern blocks of a tire mold is characterized by comprising the following steps:
calibrating the position parameters of the measuring system, adjusting the measuring coordinate system through a program, and unifying the measuring system coordinate system and the cleaning equipment coordinate system;
scanning the caliber of the pattern block and the inside of the cavity by using a measuring sensor along the vertical surface direction of the pattern block to obtain point cloud data;
the point cloud data of the pattern blocks are compared symmetrically by using the centers by utilizing the symmetry of the vertical surface directions of the pattern blocks, high points at the same positions are replaced by low points, and a part of raised ribs are removed;
extracting position points representing the caliber of the pattern block from the point cloud data so as to calculate the width of the caliber of the pattern block and the lowest point information of the caliber of the pattern block;
removing aperture position data of the pattern block from the point cloud data, taking the residual data as position data of the pattern block cavity, completing missing values of the cavity surface of the pattern block cavity which cannot be measured due to the blockage of the pattern ribs by interpolation fitting of a spline curve, and simultaneously obtaining a curve profile of the cavity surface, wherein the curve profile is a multi-section fitting curve formula;
scanning along the thickness direction of the pattern blocks to obtain point cloud data;
acquiring the radian and the diameter of the aperture arc of the pattern block and the position of an initial point of the aperture of the pattern block according to the characteristic that the aperture curve in the thickness direction of the pattern block is a standard circle;
and calculating the angle and the moving position of the cleaning laser head which need to swing when cleaning the pattern block according to the obtained curve profile of the cavity surface, the information of the caliber width and the lowest point of the pattern block, the radian and the diameter of the caliber of the pattern block and the characteristic that the action direction of the cleaning medium is close to the normal direction of the cleaning surface, and generating a corresponding processing code for an automatic cleaning device.
2. The method of claim 1, wherein the measuring position is changed to measure data at least twice in order to avoid excessive loss of cavity data due to too long ribs.
3. The method for cleaning the pattern blocks of the tire mold as claimed in claim 2, wherein the measured data of a plurality of times are compared after being respectively compared symmetrically, the measured data of a plurality of times are compared, the lowest point cloud data is taken at the same position, the raised rib data are further removed, and the final measured data are the data obtained after the measured data of a plurality of times are compared symmetrically.
4. The method for cleaning the blocks of the tire mold as claimed in claim 3, wherein after removing a part of raised ribs, the rib data with the rising trend is removed by calculating the variation trend of the point cloud data of the blocks on one side by utilizing the characteristic that the cavity on one side of the block elevation direction is in the descending trend; meanwhile, by utilizing the characteristic that the other side cavity in the vertical face direction of the pattern block is in the rising trend, the change trend of the point cloud data of the pattern block on the side is calculated, the air hole data in the falling trend is removed, and finally, after the pattern block is compared symmetrically, the interference item of the pattern block cavity is removed.
5. The method for cleaning the blocks of the tire mold as claimed in claim 1, wherein the specific method for calculating the swing angle and the moving position when the cleaning laser head is used for cleaning is as follows:
the cleaning laser head cleans along the pattern block thickness direction, and needs to calculate and obtain the following information:
(1) according to a curve formula fitted along the vertical face direction of the pattern block, taking a fixed line width as a chord length, starting from the starting point of the cavity, dividing the curve of the cavity according to the chord length, calculating the intersection point of the central line of a chord line segment and the curve of the cavity, and determining the angle of a swing axis A of a cleaning laser head and the position of an XYZ axis during cleaning each segment according to the position and the angle of the intersection point;
(2) after the angle of the swing axis A and the XYZ axis position are determined, a processing path is generated by circular interpolation according to the information of the starting point, the arc length and the diameter of the aperture of the pattern block, and the cleaning head is enabled to clean according to the path.
6. The tire mold block cleaning method according to claim 1, wherein: the specific method for calculating the swinging angle and the moving position of the cleaning laser head during cleaning comprises the following steps:
the cleaning laser head cleans along the vertical face direction of the pattern block, and the following information needs to be obtained by calculation:
(1) according to the information of the starting point, the arc length and the diameter of the pattern block caliber, taking the fixed line width as the chord length, starting from the caliber starting point, dividing a caliber curve and the like according to the chord length, simultaneously calculating the intersection point of the central line of a chord line segment and the caliber curve, and determining the angle of a swing axis B of a cleaning laser head and the position of an XYZ axis during cleaning each segment according to the position and the angle of the intersection point;
(2) after the angle of the swing axis B and the XYZ axis position are determined, a machining path is generated by circular interpolation according to curve information of the cavity and information of the cleaning height, and the cleaning head is cleaned according to the path.
7. The method for cleaning the pattern blocks of the tire mold as in claim 5 or 6, wherein after the first cleaning is completed, the angle of a swing shaft of a cleaning laser head is changed, 5-10 degrees are added on the basis of the original angle, the second cleaning is performed, the angle of the swing shaft of the cleaning laser head is changed, 5-10 degrees are reduced on the basis of the original angle, the third cleaning is performed from the opposite direction, and the situation that the side faces of the pattern ribs can be cleaned completely is guaranteed.
8. The method of claim 1, wherein the X-axis corresponds to a width direction of the block, the Y-axis corresponds to a vertical height direction of the block, and the Z-axis corresponds to a thickness direction of the block in the measurement coordinate system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111095054.7A CN113752439B (en) | 2021-09-17 | 2021-09-17 | Tire mold pattern block cleaning method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111095054.7A CN113752439B (en) | 2021-09-17 | 2021-09-17 | Tire mold pattern block cleaning method |
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| CN113752439A true CN113752439A (en) | 2021-12-07 |
| CN113752439B CN113752439B (en) | 2023-10-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114953548A (en) * | 2022-05-31 | 2022-08-30 | 武汉金顿激光科技有限公司 | Tire mold cleaning method, system and storage medium |
| CN115254806A (en) * | 2022-09-29 | 2022-11-01 | 软控联合科技有限公司 | Laser cleaning device for tire mold pattern block |
| CN116213371A (en) * | 2023-04-12 | 2023-06-06 | 武汉金顿激光科技有限公司 | Semi-automatic laser cleaning method and system |
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| CN113752439B (en) | 2023-10-27 |
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