CN113758399B - Thickness measuring method for continuous variable-thickness square plate and special-shaped plate - Google Patents
Thickness measuring method for continuous variable-thickness square plate and special-shaped plate Download PDFInfo
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- CN113758399B CN113758399B CN202111173287.4A CN202111173287A CN113758399B CN 113758399 B CN113758399 B CN 113758399B CN 202111173287 A CN202111173287 A CN 202111173287A CN 113758399 B CN113758399 B CN 113758399B
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- 238000000034 method Methods 0.000 title claims abstract description 50
- 238000012545 processing Methods 0.000 claims abstract description 24
- 238000005259 measurement Methods 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims description 34
- 230000007704 transition Effects 0.000 claims description 27
- 238000009826 distribution Methods 0.000 claims description 11
- 238000003754 machining Methods 0.000 claims description 9
- 230000007797 corrosion Effects 0.000 claims description 6
- 238000005260 corrosion Methods 0.000 claims description 6
- 238000010329 laser etching Methods 0.000 claims description 6
- 230000002146 bilateral effect Effects 0.000 claims description 4
- 238000003486 chemical etching Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000005530 etching Methods 0.000 claims description 3
- 238000002372 labelling Methods 0.000 claims description 3
- 238000003698 laser cutting Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052755 nonmetal Inorganic materials 0.000 claims description 3
- 238000003672 processing method Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000007689 inspection Methods 0.000 abstract description 3
- 239000007769 metal material Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 239000013585 weight reducing agent Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
- G01B5/06—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/20—Measuring arrangements characterised by the use of mechanical techniques for measuring contours or curvatures
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention belongs to the field of metal material processing, and particularly relates to a thickness measuring method for a continuous variable-thickness square plate and a special-shaped plate. By analyzing the coincidence ratio of the standard template and the tested plate, whether the length or the outline of the tested product exceeds the tolerance can be rapidly identified. The invention solves the problem of low efficiency of measuring the continuously variable thickness plate by the traditional method, changes the full-length measurement into the characteristic point measurement, and obviously improves the inspection efficiency.
Description
Technical Field
The invention belongs to the field of metal material processing, and particularly relates to a thickness measuring method for a continuous variable-thickness square plate and a special-shaped plate.
Background
Automobile weight reduction has become an important development trend of the automobile industry, and various new technologies corresponding to the automobile weight reduction have been applied in advance. The part prepared from the continuous thickness-variable plate (TRB plate, tailor rolled blank) has the advantages of good weight reduction effect, high collision energy absorption value, low cost and the like, and is widely applied to preparing white body structural members of passenger vehicles at present.
The continuous variable thickness part is prepared from a variable thickness plate, and the variable thickness plate is characterized in that: the thickness continuously varies along the length direction and varies linearly in most cases, but the width does not vary or varies little along the length direction, and can be regarded as constant in width, as shown in fig. 1. The plate is obtained by a rolling mill with special design through a variable roll gap rolling technology. According to the outline of the part, the corresponding continuous variable thickness square plate is required to be subjected to blanking treatment, and the corresponding special-shaped plate is obtained and then subjected to subsequent stamping, as shown in fig. 2.
The continuous variable thickness square plate and the blanking special-shaped material sheet are special: the thickness transition is a smooth transition. Although the drawing has a schematic boundary line, a thickness transition boundary line does not exist in the real object, and a quality inspector and a downstream customer cannot effectively and quickly detect the thickness of the sheet. The current measuring method is to measure a point every 10-20mm along the length direction of the steel plate, and measure the whole length, so that the measuring strength is high and the efficiency is low.
Disclosure of Invention
In order to solve the technical problems, the invention provides a thickness measuring method for a continuous variable thickness square plate and a special-shaped plate, which has the characteristics of convenient use, low cost, quick measurement and the like, and has no damage to a measuring sample. The problem of traditional method measurement continuous variable thickness panel inefficiency is solved, changes full length measurement into characteristic point measurement, and inspection efficiency improves by a wide margin, and whether the length of the tested product exceeds the tolerance can be rapidly discerned through the coincidence analysis of standard template and the tested board.
The specific technical scheme is as follows:
a thickness measuring method for a continuous variable thickness square plate and a special-shaped plate comprises the following steps:
(1) Straight plate processing
Selecting a flat plate with good flatness, and cutting and processing the flat plate strictly according to the outline of the continuous variable-thickness square plate (the width can be selected according to the convenience of measurement) and the outline of the special-shaped material sheet to obtain a flat plate with the outline dimension completely conforming to the outline line of a drawing;
(2) Transition zone boundary line identification process
Drawing a line mark on the corresponding position on the straight plate material obtained in the step (1) based on the theoretical transition boundary line position of the drawing;
(3) Labeling thickness and tolerance
For a continuous variable thickness square plate product, two tolerances of a thickness tolerance and a length tolerance exist, the square plate obtained in the step (2) is regarded as a square plate with the length tolerance of 0, and the absolute value and the tolerance of the thickness are respectively etched at positions which are easy to observe and identify manually at two sides of a dividing line;
for a variable-thickness special-shaped web, the thickness and tolerance marks need to be moved to the corresponding outline of the special-shaped web;
(4) Measuring point kidney-shaped hole processing
For a continuous variable-thickness square plate product, due to the existence of thickness tolerance, the thickness near the boundary line of the transition area on two sides of the equal thickness area can be regarded as the thickness of the plate material to be qualified as long as the thickness is within the tolerance range, the offset value of the measuring point from the boundary line needs to be pre-agreed, then a waist-shaped hole with proper size is processed at the edge of the square plate by taking the position of the offset value as a reference center, and the symmetry axis of the waist-shaped hole coincides with the reference center or has an offset value; the machining of the waist-shaped hole is not interfered with the marking of the step (3), and the marking of the step (3) is performed on the side of the waist-shaped hole, so that a measuring reference plate of the continuous variable thickness square plate is obtained;
for a variable-thickness profiled web, kidney-shaped holes need to be located at the corresponding contours of the profiled web;
(5) Measurement of
Placing a continuous variable thickness square plate or a special-shaped material sheet to be measured as a measured plate below, placing a measuring reference plate of the continuous variable thickness square plate or a measuring reference plate of the special-shaped material sheet above the measured plate, aligning the left side or the right side of the measured plate, and overlapping the two plates: if the overlap ratio does not meet the requirement, the sheet is a disqualified product; if the length tolerance or the profile tolerance of the measured plate meets the requirement, the thickness distribution of the variable-thickness square plate or the special-shaped material sheet can be obtained by manually measuring the thickness of the square plate below by using measuring equipment according to the positions of the waist-shaped holes.
The measuring method is suitable for measuring the thickness of the equal-thickness area at two sides of the transition area or the thickness of the transition area, and is used for setting corresponding measuring points in the transition area when the thickness of the transition area is measured, and processing corresponding kidney-shaped holes and marking thickness tolerance.
For the requirement of only measuring single-side thickness distribution, the measuring reference plate of the continuous variable thickness square plate or the measuring reference plate of the special-shaped material sheet only processes the part of one measured side, so that the integrity of the kidney-shaped hole and the mark is ensured; for the requirement of measuring bilateral thickness distribution, the measuring reference plate of the continuous variable thickness square plate or the measuring reference plate of the special-shaped material sheet can be respectively processed into corresponding parts of the two side profiles, so that the integrity of the kidney-shaped hole and the mark is ensured.
The flat plate in the step (1) is a metal or nonmetal material which is suitable for marking processing and waist-shaped hole processing, and has good corrosion resistance and toughness.
The flat plate in the step (1) is an equal-thickness plate or a variable-thickness plate material.
The marking mark of step (2) adopts laser etching, physical processing or chemical corrosion method; the mark of the line drawn is clearly visible, and the line width of the dividing line is less than 0.2mm.
And (3) etching the absolute value and tolerance of the thickness in the step (3) by adopting a laser etching method, a physical processing method or a chemical etching method.
The offset which is agreed in advance in the step (4) is less than or equal to 15mm.
And (4) machining the kidney-shaped hole by adopting a laser cutting or machining means.
And (4) the width of the waist-shaped hole is 5-8mm, the depth of the waist-shaped hole is more than or equal to 15mm, and the influence of a thinning area at the edge of the raw material is avoided.
Compared with the prior art, the invention has the following beneficial technical effects:
as proved by the actual control process and field feedback, the thickness precision data of the continuous variable thickness plate can be represented by only selecting a certain number of characteristic points for thickness measurement. The invention does not adopt the traditional measurement method to carry out intensive measurement on the full-length thickness, but proposes the concept of a standard template, and selects a certain number of characteristic points on the standard template, wherein the characteristic points are near the two sides of a transition boundary line (generally offset by 5-10 mm), and the thickness measurement of the continuously variable thickness plate can be realized only by measuring the positions of the characteristic points, thereby solving the problem that the traditional means can not rapidly measure the continuously variable thickness plate; the number of the characteristic points is far less than that of the full-length measurement points, so that the inspection efficiency is greatly improved;
the invention has the characteristic points that waist-shaped holes are processed, so that the measuring of the micrometer equivalent tool is facilitated. The superposition degree of the standard template method and the measured plate can conveniently judge whether the length of the tested product exceeds the tolerance.
The boundary marks and the thickness information marks near the characteristic points are convenient for measuring staff to carry out quick calibration, measurement and memorization of the measuring tool. The transition zone boundary is not marked nor does it actually affect the final measurement, but this marking helps the operator to make the transition zone location clearer.
In addition, for the requirement of only measuring single-side thickness distribution, the measuring reference plate of the continuous variable thickness square plate or the measuring reference plate of the special-shaped material sheet only processes the part at one side to be measured, so that the integrity of the kidney-shaped hole and the mark is ensured; for the requirement of measuring bilateral thickness distribution, the measuring reference plate of the continuous variable thickness square plate or the measuring reference plate of the special-shaped material sheet can be respectively processed into corresponding parts of the two side profiles, so that the integrity of the kidney-shaped hole and the mark is ensured. This can greatly reduce the weight of the reference measurement plate.
Drawings
FIG. 1 is a schematic view of a typical continuously variable thickness sheet structure;
FIG. 2 is a schematic view of a profiled sheet obtained after blanking of a continuous variable thickness square plate, wherein the dashed lines represent the continuous variable thickness square plate and the inner solid line closed area represents the profile of the continuous variable thickness profiled sheet;
FIG. 3 is a schematic diagram of a kidney-shaped hole in a square plate measurement point;
fig. 4 is a schematic diagram of waist-shaped hole processing at a measuring point of a special-shaped plate material;
in the figure, 1, a kidney-shaped hole; 2. thickness and tolerance identification.
Detailed Description
The present invention will be described in detail with reference to the drawings and examples, but the scope of the present invention is not limited by the drawings and examples.
Fig. 3 is a schematic diagram of square plate measuring point kidney-shaped hole processing, and fig. 4 is a schematic diagram of special-shaped plate measuring point kidney-shaped hole processing, as shown in the following:
example 1
The invention relates to a thickness measuring method of a continuous variable thickness square plate and a special-shaped plate, which specifically comprises the following steps:
(1) Straight plate processing
Selecting a flat plate with good flatness, strictly according to the outline of the continuous variable thickness square plate, and cutting the outline of the special-shaped material sheet according to the width which is convenient to measure, so as to obtain a flat plate with the outline dimension completely conforming to the outline line of the drawing;
(2) Transition zone boundary line identification process
Drawing a line mark on the corresponding position on the straight plate material obtained in the step (1) based on the theoretical transition boundary line position of the drawing;
(3) Labeling thickness and tolerance
For a continuous variable thickness square plate product, two tolerances of a thickness tolerance and a length tolerance exist, the square plate obtained in the step (2) is regarded as a square plate with the length tolerance of 0, and the absolute value and the tolerance of the thickness are respectively etched at positions which are easy to observe and identify manually at two sides of a dividing line;
for a variable-thickness special-shaped web, the thickness and tolerance marks need to be moved to the corresponding outline of the special-shaped web;
(4) Measuring point kidney-shaped hole processing
For a continuous variable-thickness square plate product, due to the existence of thickness tolerance, the thickness near the boundary line of the transition area on two sides of the equal thickness area can be regarded as the thickness of the plate material to be qualified as long as the thickness is within the tolerance range, the offset value of the measuring point from the boundary line needs to be pre-agreed, then a waist-shaped hole with proper size is processed at the edge of the square plate by taking the position of the offset value as a reference center, and the symmetry axis of the waist-shaped hole coincides with the reference center or has an offset value; the machining of the waist-shaped hole is not interfered with the marking of the step (3), and the marking of the step (3) is performed on the side of the waist-shaped hole, so that a measuring reference plate of the continuous variable thickness square plate is obtained;
for a variable-thickness profiled web, kidney-shaped holes need to be located at the corresponding contours of the profiled web;
(5) Measurement of
Placing a continuous variable thickness square plate or a special-shaped material sheet to be measured as a measured plate below, placing a measuring reference plate of the continuous variable thickness square plate or a measuring reference plate of the special-shaped material sheet above the measured plate, aligning the left side or the right side of the measured plate, and overlapping the two plates: if the overlap ratio does not meet the requirement, the sheet is a disqualified product; if the length tolerance or the profile tolerance of the measured plate meets the requirement, the thickness distribution of the variable-thickness square plate or the special-shaped material sheet can be obtained by manually measuring the thickness of the square plate below by using measuring equipment according to the positions of the waist-shaped holes.
The measuring method is suitable for measuring the thickness of the equal-thickness area at two sides of the transition area or the thickness of the transition area, and is used for setting corresponding measuring points in the transition area when the thickness of the transition area is measured, and processing corresponding kidney-shaped holes and marking thickness tolerance.
For the requirement of only measuring single-side thickness distribution, the measuring reference plate of the continuous variable thickness square plate or the measuring reference plate of the special-shaped material sheet only processes the part of one measured side, so that the integrity of the kidney-shaped hole and the mark is ensured; for the requirement of measuring bilateral thickness distribution, the measuring reference plate of the continuous variable thickness square plate or the measuring reference plate of the special-shaped material sheet can be respectively processed into corresponding parts of the two side profiles, so that the integrity of the kidney-shaped hole and the mark is ensured.
The flat plate in the step (1) is a metal or nonmetal material which is suitable for marking processing and waist-shaped hole processing, and has good corrosion resistance and toughness.
The flat plate in the step (1) is an equal-thickness plate or a variable-thickness plate material.
The marking mark of step (2) adopts laser etching, physical processing or chemical corrosion method; the mark of the line drawn is clearly visible, and the line width of the dividing line is less than 0.2mm.
And (3) etching the absolute value and tolerance of the thickness in the step (3) by adopting a laser etching method, a physical processing method or a chemical etching method.
The offset which is agreed in advance in the step (4) is less than or equal to 15mm.
And (4) machining the kidney-shaped hole by adopting a laser cutting or machining means.
And (4) the width of the waist-shaped hole is 5-8mm, the depth of the waist-shaped hole is more than or equal to 15mm, and the influence of a thinning area at the edge of the raw material is avoided.
Example 2
The difference from example 1 is that the flat plate is a variable thickness plate, the line mark in step (2) is chemically etched, and the absolute value of the thickness and the tolerance in step (3) are etched by chemical etching.
Claims (10)
1. The thickness measuring method for the continuous variable-thickness square plate and the special-shaped plate is characterized by comprising the following steps of:
(1) Straight plate processing
Selecting a flat plate with good flatness, strictly according to the outline of the continuous variable thickness square plate, and cutting the outline of the special-shaped material sheet according to the width which is convenient to measure, so as to obtain a flat plate with the outline dimension completely conforming to the outline line of the drawing;
(2) Transition zone boundary line identification process
Drawing a line mark on the corresponding position on the straight plate material obtained in the step (1) based on the theoretical transition boundary line position of the drawing;
(3) Labeling thickness and tolerance
For a continuous variable thickness square plate product, two tolerances of a thickness tolerance and a length tolerance exist, the square plate obtained in the step (2) is regarded as a square plate with the length tolerance of 0, and the absolute value and the tolerance of the thickness are respectively etched at positions which are easy to observe and identify manually at two sides of a dividing line;
for a variable-thickness special-shaped web, the thickness and tolerance marks need to be moved to the corresponding outline of the special-shaped web;
(4) Measuring point kidney-shaped hole processing
For a continuous variable-thickness square plate product, due to the existence of thickness tolerance, the thickness near the boundary line of the transition area on two sides of the equal thickness area can be regarded as the thickness of the plate material to be qualified as long as the thickness is within the tolerance range, the offset value of the measuring point from the boundary line needs to be pre-agreed, then a waist-shaped hole with proper size is processed at the edge of the square plate by taking the position of the offset value as a reference center, and the symmetry axis of the waist-shaped hole coincides with the reference center or has an offset value; the machining of the waist-shaped hole is not interfered with the marking of the step (3), and the marking of the step (3) is performed on the side of the waist-shaped hole, so that a measuring reference plate of the continuous variable thickness square plate is obtained;
for a variable-thickness profiled web, kidney-shaped holes need to be located at the corresponding contours of the profiled web;
(5) Measurement of
Placing a continuous variable thickness square plate or a special-shaped material sheet to be measured as a measured plate below, placing a measuring reference plate of the continuous variable thickness square plate or a measuring reference plate of the special-shaped material sheet above the measured plate, aligning the left side or the right side of the measured plate, and overlapping the two plates: if the overlap ratio does not meet the requirement, the sheet is a disqualified product; if the length tolerance or the profile tolerance of the measured plate meets the requirement, the thickness distribution of the variable-thickness square plate or the special-shaped material sheet can be obtained by manually measuring the thickness of the square plate below by using measuring equipment according to the positions of the waist-shaped holes.
2. The thickness measuring method for continuously variable thickness square plate and special-shaped plate according to claim 1, wherein the thickness measuring method comprises the following steps: the measuring method is suitable for measuring the thickness of the equal-thickness area at two sides of the transition area or the thickness of the transition area, and is used for setting corresponding measuring points in the transition area when the thickness of the transition area is measured, and processing corresponding kidney-shaped holes and marking thickness tolerance.
3. The thickness measuring method for continuously variable thickness square plate and special-shaped plate according to claim 1, wherein the thickness measuring method comprises the following steps: for the requirement of only measuring single-side thickness distribution, the measuring reference plate of the continuous variable thickness square plate or the measuring reference plate of the special-shaped material sheet only processes the part of one measured side, so that the integrity of the kidney-shaped hole and the mark is ensured; for the requirement of measuring bilateral thickness distribution, the measuring reference plate of the continuous variable thickness square plate or the measuring reference plate of the special-shaped material sheet can be respectively processed into corresponding parts of the two side profiles, so that the integrity of the kidney-shaped hole and the mark is ensured.
4. The thickness measuring method for continuously variable thickness square plate and special-shaped plate according to claim 1, wherein the thickness measuring method comprises the following steps: the flat plate in the step (1) is a metal or nonmetal material which is suitable for marking processing and waist-shaped hole processing, and has good corrosion resistance and toughness.
5. The thickness measuring method for continuously variable thickness square plate and special-shaped plate according to claim 1, wherein the thickness measuring method comprises the following steps: the flat plate in the step (1) is an equal-thickness plate or a variable-thickness plate material.
6. The thickness measuring method for continuously variable thickness square plate and special-shaped plate according to claim 1, wherein the thickness measuring method comprises the following steps: the marking mark of step (2) adopts laser etching, physical processing or chemical corrosion method; the mark of the line drawn is clearly visible, and the line width of the dividing line is less than 0.2mm.
7. The thickness measuring method for continuously variable thickness square plate and special-shaped plate according to claim 1, wherein the thickness measuring method comprises the following steps: and (3) etching the absolute value and tolerance of the thickness in the step (3) by adopting a laser etching method, a physical processing method or a chemical etching method.
8. The thickness measuring method for continuously variable thickness square plate and special-shaped plate according to claim 1, wherein the thickness measuring method comprises the following steps: the offset which is agreed in advance in the step (4) is less than or equal to 15mm.
9. The thickness measuring method for continuously variable thickness square plate and special-shaped plate according to claim 1, wherein the thickness measuring method comprises the following steps: and (4) machining the kidney-shaped hole by adopting a laser cutting or machining means.
10. The thickness measuring method for continuously variable thickness square plate and special-shaped plate according to claim 1, wherein the thickness measuring method comprises the following steps: and (4) the width of the waist-shaped hole is 5-8mm, the depth of the waist-shaped hole is more than or equal to 15mm, and the influence of a thinning area at the edge of the raw material is avoided.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040049607A (en) * | 2002-12-06 | 2004-06-12 | 주식회사 포스코 | Method for Manufacturing Shipbuilding Steel Plate |
| CN109029200A (en) * | 2018-08-01 | 2018-12-18 | 上海宝钢包装钢带有限公司 | A kind of off-line checking method of Varying-thickness Automobile Plate |
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2021
- 2021-10-09 CN CN202111173287.4A patent/CN113758399B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040049607A (en) * | 2002-12-06 | 2004-06-12 | 주식회사 포스코 | Method for Manufacturing Shipbuilding Steel Plate |
| CN109029200A (en) * | 2018-08-01 | 2018-12-18 | 上海宝钢包装钢带有限公司 | A kind of off-line checking method of Varying-thickness Automobile Plate |
Non-Patent Citations (1)
| Title |
|---|
| 影响TRB单向拉伸的几何参数研究;李艳华;杜继涛;费宏斌;;现代制造工程;20100318(第03期);全文 * |
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