CN108296551B - Trimming shear adjusting method capable of improving trimming quality of deep-drawing steel - Google Patents
Trimming shear adjusting method capable of improving trimming quality of deep-drawing steel Download PDFInfo
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- CN108296551B CN108296551B CN201810015556.6A CN201810015556A CN108296551B CN 108296551 B CN108296551 B CN 108296551B CN 201810015556 A CN201810015556 A CN 201810015556A CN 108296551 B CN108296551 B CN 108296551B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D31/00—Shearing machines or shearing devices covered by none or more than one of the groups B23D15/00 - B23D29/00; Combinations of shearing machines
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Abstract
The invention relates to a trimming shear adjusting method capable of improving trimming quality of deep-drawing steel, which comprises the following steps of firstly, establishing a trimming shear GAP amount adjusting mathematical model in a secondary system for controlling trimming shears, and determining a GAP value and a LAP value which are suitable for trimming the deep-drawing steel according to the thickness of strip steel:
then, the secondary system automatically controls the edge-cutting shears to adjust the gap amount by utilizing the established mathematical model, and the shearing of the edge of the strip steel is completed; when burrs appear at the edge of the strip steel, the cutting edges are aged, and at the moment, the gap amount of the trimming shears is manually adjusted, so that the optimal thickness of the trimmed torn surface accounts for 25-35% of the thickness of the strip steel. The invention can obviously improve the quality of deep drawing steel products, reduces the burr defect rate of the products by more than 85 percent, has great effect on the quality and stable production of cold rolling products, and better solves the bottleneck problem of trimming strip steel.
Description
Technical Field
The invention relates to a trimming shear adjusting method capable of improving trimming quality of deep-drawing steel, and belongs to the technical field of cold-rolled strip steel trimming shear control methods.
Background
In the production process of cold-rolled strip steel products, the edge shears are used for shearing edge defects of the strip steel, the width of the whole strip steel is ensured to be consistent, and the width precision of the strip steel is improved; the edge trimmer is widely applied to a push-pull type pickling line, a continuous pickling line, a pickling-rolling mill combined unit, a finishing unit and a recoiling unit, and is an important process in the production process of strip steel; the GAP amount of the edge cutting shears is determined by the GAP value (GAP value, unit: mm) and the LAP value (meshing amount, unit: mm), and the accurate and timely adjustment of the GAP amount of the edge cutting shears determines the edge cutting quality of the strip steel. With the increasing demand of the market for cold-rolled sheets and the increasing requirements on the performance and quality of strip steel, in the production of high-quality cold-rolled strip steel, the requirements on the quality of the strip steel edge are more strict than the requirements on the quality of the strip steel edge in the past: the sections of the two side parts of the strip steel are required to be straight and smooth without the defects of rough edges, edge cracks and the like, so that the production of the next procedure is facilitated. In the actual production process, especially in the production process of deep-drawing steel, because of deep-drawing steel matter is softer, the side cut is cut when cutting edge, and the difficult adjustment of side cut clearance volume easily leads to finished product belted steel to appear deckle edge defect because of reasons such as artifical adjustment clearance is improper or adjustment untimely, seriously influences belted steel finished product limit portion quality, and then influences enterprise economic benefits.
Disclosure of Invention
The invention aims to solve the technical problem of providing an edge-cutting shear adjusting method capable of improving the edge-cutting quality of deep-drawing steel.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a trimming shear adjusting method capable of improving trimming quality of deep-drawing steel comprises the following steps:
the method comprises the following steps: establishing a mathematical model for adjusting the GAP amount of the trimming shears in a secondary system for controlling the trimming shears, and determining a GAP value and a LAP value which are suitable for deep drawing steel trimming according to the thickness of strip steel:
in formulae (1) and (2): h is the thickness of the strip steel;
step two: the secondary system automatically controls the edge-cutting shears to adjust the gap amount by using the mathematical model established in the step one, and the shearing of the edge of the strip steel is completed;
step three: when burrs appear at the edge of the strip steel, the cutting edges are aged, and at the moment, the gap amount of the trimming shears is manually adjusted, so that the optimal thickness of the trimmed torn surface accounts for 25-35% of the thickness of the strip steel.
The trimming shears adjusting method capable of improving the trimming quality of deep-drawing steel comprises the following steps of: firstly, adjusting the GAP value, if burrs still appear, adjusting the LAP value, specifically:
when the thickness of the torn section is lower than 25% of the thickness of the strip steel, the GAP value is increased according to the gradient of 0.01 x h, and if the quality of the cut edge is improved, the optimal torn section thickness of the cut edge accounts for 25% -35% of the thickness of the strip steel, and the LAP value is not adjusted; if the quality of the cut edge is not obviously improved, reducing the LAP value according to the gradient of 0.01 x h; until the quality of the cut edge is improved, the proportion of the optimal thickness of the cut edge tearing section to the thickness of the strip steel is 25-35%.
When the thickness of the torn section is higher than 35% of the thickness of the strip steel, the GAP value is reduced according to the gradient of 0.01 x h, if the quality of the cut edge is improved, the optimal torn section thickness of the cut edge accounts for 25% -35% of the thickness of the strip steel, and the LAP value is not adjusted; if the quality of the cut edge is not obviously improved, increasing the LAP value according to the gradient of 0.01 x h; until the quality of the cut edge is improved, the proportion of the optimal thickness of the cut edge tearing section to the thickness of the strip steel is 25-35%.
The invention has the beneficial effects that:
according to the invention, a large number of trimming shear GAP values are collected in actual production, and a mathematical model of a GAP (GAP of cut edge) value and an LAP (meshing amount) value of deep drawing steel is established through long-term research and exploration, and is maintained in a secondary system, so that the automatic calling of trimming shear GAP parameters during trimming of the deep drawing steel is realized; when the cutting edge is aged, the GAP amount is compensated and adjusted according to the gradient by a method of adjusting the GAP value and then adjusting the LAP value, so that the trimming quality is effectively ensured, and the product quality is improved;
after the method is implemented in the Handover steel group cold rolling mill, the burr defect rate of the product is reduced by more than 85%, the method has great effect on the quality and stable production of the cold rolled product, and the bottleneck problem of trimming strip steel is well solved.
Drawings
FIG. 1 is a typical cut edge quality graph prior to the practice of the present invention;
FIG. 2 is a graph of the quality of the cut edge of the present invention 1;
FIG. 3 is a graph of the quality of the cut edge of the practice 2 of the present invention;
fig. 4 is a graph of the quality of the cut edge of the inventive example 3.
Detailed Description
The invention relates to an edge cutting shear adjusting method capable of improving the edge cutting quality of deep drawing steel, which comprises the following steps:
step one, establishing a trimming shear GAP amount adjustment mathematical model in a secondary system for controlling trimming shears, and determining a GAP value (GAP value, unit mm) and a LAP value (meshing amount, unit mm) suitable for deep drawing steel according to the thickness of strip steel:
wherein: h is the thickness of the strip steel;
when burrs appear on the edges of the strip steel, the fact that the shearing edges start to age is indicated, and the GAP amount of the trimming shears is manually adjusted by firstly adjusting the GAP value and then adjusting the LAP value until the optimal trimming tearing section thickness accounts for 25% -35% of the strip steel thickness.
When the thickness of the torn section is lower than 25% of the thickness of the strip steel, the GAP value is increased according to the gradient of 0.01 x h, and if the quality of the cut edge is improved, the optimal torn section thickness of the cut edge accounts for 25% -35% of the thickness of the strip steel, and the LAP value is not adjusted; if the quality of the cut edge is not improved obviously, reducing the LAP value according to the gradient of 0.01 x h; until the quality of the cut edge is improved, the proportion of the optimal thickness of the cut edge tearing section to the thickness of the strip steel is 25-35%.
When the thickness of the torn section is higher than 35% of the thickness of the strip steel, the GAP value is reduced according to the gradient of 0.01 x h, if the quality of the cut edge is improved, the optimal torn section thickness of the cut edge accounts for 25% -35% of the thickness of the strip steel, and the LAP value is not adjusted; if the quality of the cut edge is not improved obviously, increasing the LAP value according to the gradient of 0.01 x h; until the quality of the cut edge is improved, the proportion of the optimal thickness of the cut edge tearing section to the thickness of the strip steel is 25-35%.
The invention is further illustrated by the following examples:
example 1: the thickness of the produced deep-drawing strip steel is 2.8mm, and during normal trimming, the secondary system automatically calls the GAP value and the LAP value according to a model formula as follows:
the GAP value system of the trimming shear automatically adjusts to 0.47mm, and the LAP value system of the meshing amount automatically adjusts to 1.53 mm;
when the thickness of the torn surface is less than 25% of the thickness of the strip steel, increasing the GAP value according to the gradient of 0.01 x 2.8=0.028mm, manually adjusting the GAP value to 0.47+0.028=0.498mm, finding that the quality of the cut edge is good, and enabling the optimal torn surface thickness of the cut edge to account for 25% -35% of the thickness of the strip steel, so that the LAP value is not adjusted; when the GAP value is manually adjusted to 0.498, the quality of the cut edge is not obviously improved, the LAP value is reduced according to the gradient of 0.01 x 2.8=0.028mm, and the LAP value is manually adjusted to 1.53-0.028=1.502mm until the quality of the cut edge is improved, so that the proportion of the thickness of the torn surface to the thickness of the strip steel is 25% -35%.
When the thickness of the torn section is higher than 35% of the thickness of the strip steel, reducing the GAP value according to the gradient of 0.01 x 2.8=0.028mm, manually adjusting the GAP value to 0.47-0.028=0.442mm, finding that the quality of the cut edge is improved, and enabling the optimal torn section thickness of the cut edge to account for 25% -35% of the thickness of the strip steel, so that the LAP value is not adjusted; when the GAP value is manually adjusted to 0.442, the quality of the cut edge is not obviously improved, the LAP value is increased according to the gradient of 0.01 x 2.8=0.028mm, the LAP value is manually adjusted to 1.53+0.028=1.558mm until the quality of the cut edge is improved, and the proportion of the thickness of the torn surface to the thickness of the strip steel is 25-35 percent
The trimming quality of the deep drawing steel is effectively improved by automatically calling the GAP value and the LAP value of the trimming GAP through a secondary system and manually adjusting the GAP value and the LAP value when the shearing edge is aged.
Example 2: the thickness of the produced deep-drawing strip steel is 3.5mm, and during normal trimming, the secondary system automatically calls the GAP value and the LAP value according to a model formula as follows:
the GAP value system of the trimming shear automatically adjusts to 0.58mm, and the LAP value system of the meshing amount automatically adjusts to 1.42 mm;
when the thickness of the torn surface is less than 25% of the thickness of the strip steel, increasing the GAP value according to the gradient of 0.01 x 3.5=0.035mm, manually adjusting the GAP value to 0.58+0.035=0.615mm, finding that the quality of the cut edge is good, and enabling the optimal torn surface thickness of the cut edge to account for 25% -35% of the thickness of the strip steel, and then not adjusting the LAP value; after the GAP value is manually adjusted to 0.615, the quality of the cut edge is not obviously improved, the LAP value is reduced according to the gradient of 0.01 × 3.5=0.035mm, the LAP value is manually adjusted to 1.42-0.035=1.385mm until the quality of the cut edge is improved, and the proportion of the thickness of the torn surface to the thickness of the strip steel is 25% -35%.
When the thickness of the tearing section is higher than 35% of the thickness of the strip steel, the GAP value is reduced according to the gradient of 0.01 x 3.5=0.035mm, the GAP value is manually adjusted to be 0.58-0.035=0.545mm, the quality of the cut edge is found to be good, the proportion of the optimal thickness of the tearing section of the cut edge to the thickness of the strip steel is 25% -35%, and the LAP value is not adjusted; after the GAP value is manually adjusted to 0.545, the quality of the cut edge is not obviously improved, the LAP value is increased according to the gradient of 0.01 × 3.5=0.035mm, and the LAP value is manually adjusted to 1.42+0.035=1.455mm until the quality of the cut edge is improved, so that the proportion of the thickness of the tear surface to the thickness of the strip steel is 25% -35%.
The trimming quality of the deep drawing steel is effectively improved by adjusting the trimming gap.
Example 3: the thickness of the produced deep-drawing strip steel is 4.6mm, and during normal trimming, the secondary system automatically calls the GAP value and the LAP value according to a model formula as follows:
the GAP value system of the trimming shear automatically adjusts to 0.77mm, and the LAP value system of the meshing amount automatically adjusts to 1.23 mm;
when the thickness of the torn section is less than 25% of the thickness of the strip steel, increasing the GAP value according to the gradient of 0.01 x 4.6=0.046mm, manually adjusting the GAP value to 0.77+0.046=0.816mm, finding that the quality of the cut edge is good, and enabling the optimal torn section thickness of the cut edge to account for 25% -35% of the thickness of the strip steel, so that the LAP value is not adjusted; after the GAP value is manually adjusted to 0.816, the quality of the cut edge is not obviously improved, the LAP value is reduced according to the gradient of 0.01 x 4.6=0.046mm, and the LAP value is manually adjusted to 1.23-0.046=1.184mm until the quality of the cut edge is improved, so that the proportion of the thickness of the torn surface to the thickness of the strip steel is 25% -35%.
When the thickness of the tearing section is higher than 35% of the thickness of the strip steel, reducing the GAP value according to the gradient of 0.01 x 4.6=0.046mm, manually adjusting the GAP value to 0.77-0.046=0.724mm, finding that the quality of the cut edge is improved, and enabling the optimal thickness of the tearing section of the cut edge to account for 25% -35% of the thickness of the strip steel, so that the LAP value is not adjusted any more; when the GAP value was manually adjusted to 0.724, no significant improvement in the quality of the cut edge was observed, and the LAP value was increased by a gradient of 0.01 × 4.6=0.046mm and manually adjusted to 1.23+0.046=1.276mm until the quality of the cut edge was improved. The proportion of the thickness of the torn surface to the thickness of the strip steel is 25 to 35 percent.
Through the automatic calling of the trimming gap and the manual adjustment when the shearing edge is aged, the trimming quality of the deep drawing steel is improved.
After the method is implemented, the workload of manually adjusting parameters by operators can be effectively reduced, and the model is maintained in a secondary system through the established mathematical model of the GAP value and the LAP value of the engagement quantity of the trimming GAP of the deep drawing steel, so that the automatic calling of the parameters during trimming is realized; when the cutting edge is aged, the compensation is manually carried out according to the gradient through the parameter adjusting mode of GAP and LAP, so that the trimming quality is effectively ensured, the product quality is improved, the product burr defect rate is reduced by more than 85%, the cold rolling product quality and the stable production are greatly influenced, and the bottleneck problem of strip steel trimming is well solved.
Claims (1)
1. The utility model provides a can promote deep-drawing steel side cut quality's side cut and cut adjustment method which characterized in that: the method comprises the following steps:
the method comprises the following steps: establishing a mathematical model for adjusting the GAP amount of the trimming shears in a secondary system for controlling the trimming shears, and determining a GAP value and a LAP value which are suitable for deep drawing steel trimming according to the thickness of strip steel:
in formulae (1) and (2): h is the thickness of the strip steel;
step two: the secondary system automatically controls the edge-cutting shears to adjust the gap amount by using the mathematical model established in the step one, and the shearing of the edge of the strip steel is completed;
step three: when burrs appear at the edge of the strip steel, the cutting edges are aged, and at the moment, the gap amount of the trimming shears is manually adjusted, so that the optimal thickness of the trimmed torn surface accounts for 25-35% of the thickness of the strip steel;
the method for manually adjusting the gap amount of the trimming shears comprises the following steps: firstly, adjusting the GAP value, if burrs still appear, adjusting the LAP value, specifically:
when the thickness of the torn section is lower than 25% of the thickness of the strip steel, the GAP value is increased according to the gradient of 0.01 x h, and if the quality of the cut edge is improved, the optimal torn section thickness of the cut edge accounts for 25% -35% of the thickness of the strip steel, and the LAP value is not adjusted; if the quality of the cut edge is not obviously improved, reducing the LAP value according to the gradient of 0.01 x h; until the quality of the cut edge is improved, the proportion of the optimal thickness of the cut edge tearing section to the thickness of the strip steel is 25-35 percent;
when the thickness of the torn section is higher than 35% of the thickness of the strip steel, the GAP value is reduced according to the gradient of 0.01 x h, if the quality of the cut edge is improved, the optimal torn section thickness of the cut edge accounts for 25% -35% of the thickness of the strip steel, and the LAP value is not adjusted; if the quality of the cut edge is not obviously improved, increasing the LAP value according to the gradient of 0.01 x h; until the quality of the cut edge is improved, the proportion of the optimal thickness of the cut edge tearing section to the thickness of the strip steel is 25-35%.
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| CN108890021B (en) * | 2018-07-24 | 2019-10-25 | 江苏世星电子科技有限公司 | A kind of soft state thin plate slitting method |
| CN109047899B (en) * | 2018-07-24 | 2019-11-12 | 浙江郑林机械股份有限公司 | A kind of soft state thin plate slitting guide and guards |
| CN110576214A (en) * | 2019-09-17 | 2019-12-17 | 攀钢集团西昌钢钒有限公司 | trimming quality control method |
| CN112658031A (en) * | 2020-12-10 | 2021-04-16 | 华菱安赛乐米塔尔汽车板有限公司 | Control method for improving edge forming of cold-rolled hot-galvanized high-strength dual-phase steel |
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