Method for rapid local cutting-free of automotive hot formed parts

Abstract

The application relates to the field of hot forming laser cutting technology, in particular to a rapid local cutting-free method for automobile hot forming parts. The method comprises the following steps: S1, confirming a cutting starting point and a cutting ending point of a sheet by using CAD software; S2, performing line marking on a cutting-free area of the sheet by using a laser cutting device; S3, determining a final required sheet boundary line according to the line marking of the cutting-free area and an actual sheet boundary line; and S4, cutting according to the determined required sheet boundary line. The technical scheme is used to solve the problems of complex laser cutting mode, high laser cutting cost, low efficiency and low cutting precision in the prior art.

Description

Technical Field

[0001] This invention relates to the field of thermoforming laser cutting technology, and in particular to a rapid, localized, non-cutting method for thermoformed automotive parts. Background Technology

[0002] Automotive thermoforming effectively reduces part weight while simultaneously increasing strength, making it one of the strongest lightweight automotive parts available. Due to the high strength of thermoformed parts, current cold-cutting punching technology suffers from drawbacks such as short die life, numerous burrs, instability, and low feasibility of full-cutting. Laser cutting, on the other hand, effectively guarantees cutting speed and precision, making it the most widely used and stable cutting process for automotive thermoformed parts. However, most stable and reliable laser cutting equipment is imported, resulting in high operating and processing costs. Furthermore, existing laser cutting methods are relatively complex in defining boundaries, leading to larger errors and more frequent adjustments, thus causing increased costs, lower efficiency, and lower cutting precision during the laser cutting process. Summary of the Invention

[0003] To address the shortcomings of the aforementioned technologies, the present invention aims to provide a rapid, localized, non-cutting method for automotive thermoformed parts, thereby solving the problems of complex laser cutting methods in the prior art, which result in high laser cutting costs, low efficiency, and low cutting accuracy.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A rapid, localized, non-cutting method for automotive thermoformed parts includes the following steps: S1. Use CAD software to confirm the starting and ending points of the material cutting; S2. Use laser cutting equipment to scribing lines in the non-cutting area of ​​the material sheet; S3. Determine the final required sheet boundary line based on the scribing lines of the non-cutting area and the actual sheet boundary line; S4. Cut according to the determined boundary line of the required material sheet.

[0005] Further specifying, in step S2, the scribing lines in the non-cutting area of ​​the sheet include several horizontal scribing lines and several vertical scribing lines, and the horizontal scribing lines and vertical scribing lines are arranged in an alternating manner.

[0006] Furthermore, the distance between adjacent transverse etched lines is equal to the distance between adjacent longitudinal etched lines.

[0007] Furthermore, the distance between adjacent transverse scribe lines and the distance between longitudinal scribe lines are both 1-3 mm.

[0008] Further specifying, in step S3, the required material sheet boundary line is located within the etched line of the non-cutting area.

[0009] Further specifying, in step S3, the actual material sheet boundary line refers to the boundary line of the material sheet before it is cut, and the required material sheet boundary line refers to the boundary line of the material sheet after it is cut.

[0010] Further specifying, the method for determining the required boundary line in step S3 is as follows: S31. Measure whether the distance between the required material sheet boundary line and the actual material sheet boundary line is within the allowable error range; S32. Adjust the position of the required sheet boundary line locally according to the measured value until the complete required sheet boundary line is obtained.

[0011] The technical effects achieved by this invention are as follows: (1) In areas where the precision requirements of the part boundary are low or the forming stretching is gentle, the cutting length is reduced, thereby effectively reducing the cutting time, increasing the cutting cycle, and saving equipment energy. (2) The method in this technical solution can achieve rapid local cutting-free, which can save a lot of debugging time while ensuring cutting accuracy, thereby improving efficiency and reducing costs. Attached Figure Description

[0012] Figure 1 A schematic diagram for determining the start and end points of the sheet material for non-cutting; Figure 2 This is a schematic diagram of lines being engraved on a sheet of material; Figure 3 This is a schematic diagram showing the material after it has been cut. Figure 4 for Figure 2 A magnified view of a portion of point A in the middle.

[0013] Appendix Number Horizontal engraving 1, vertical engraving 2. Detailed Implementation

[0014] The following detailed description illustrates the specific implementation method: like Figures 1-4 As shown, the rapid local non-cutting method for automotive thermoformed parts includes the following steps: S1. Use CAD software to confirm the starting and ending points of the material cutting; S2. Use laser cutting equipment to scribing lines in the non-cutting area of ​​the material sheet; S3. Determine the final required sheet boundary line based on the scribing lines of the non-cutting area and the actual sheet boundary line; S4. Cut according to the determined boundary line of the required material sheet.

[0015] In one possible implementation, in step S2, the markings in the non-cutting area of ​​the sheet include a plurality of horizontal markings 1 and a plurality of vertical markings 2. The horizontal markings 1 and the vertical markings 2 are arranged in an alternating manner. The alternating arrangement means that the horizontal markings 1 and the vertical markings are kept perpendicular to each other at a fixed angle as much as possible, which facilitates positioning during subsequent measurement. In this specific implementation, the angle between the two is preferably 90 degrees.

[0016] In one possible implementation, the distance between adjacent horizontal engravings 1 is equal to the distance between adjacent vertical engravings 2. Equal distances facilitate the calculation of distances in subsequent processes and can greatly simplify the calculation steps. It should be noted that the distance between adjacent horizontal engravings 1 and vertical engravings 2 should also be equal, that is, the horizontal engravings 1 and vertical engravings 2 are arranged at equal intervals.

[0017] In one possible implementation, the distance between adjacent transverse engravings 1 and the distance between longitudinal engravings 2 are both 1-3 mm. The advantage of this is that the smaller the spacing, the higher the accuracy of subsequent distance measurement and cutting. Therefore, in this specific implementation, the spacing is preferably 1 mm.

[0018] In one possible implementation, in step S3, the required material sheet boundary line is located within the scribing line of the non-cutting area. It is easy to understand that only when the required material sheet boundary line is within the scribing line can the scribing line be better used as a distance reference for calculating and measuring its position.

[0019] In one possible implementation, in step S3, the actual sheet boundary line refers to the boundary line of the sheet before it is cut, and the required sheet boundary line refers to the boundary line of the sheet after it is cut.

[0020] In one possible implementation, the method for determining the required boundary line in step S3 is as follows: S31. Measure whether the distance between the required material sheet boundary line and the actual material sheet boundary line is within the allowable error range; S32. Adjust the position of the required sheet boundary line locally according to the measured value until the complete required sheet boundary line is obtained.

[0021] It is necessary to explain the principle of the method in this technical solution. This method is fast and effective in the laser cutting process, while traditional cutting methods have no reference line for boundary adjustment, resulting in large errors and many adjustment times. In this method, after the sheet is cut, the required sheet boundary line falls within the horizontal scribe line 1 and the vertical scribe line 2. The distance between the horizontal and vertical scribe lines and the sheet boundary is measured, and the required sheet boundary is adjusted according to the measurement value until the final required sheet boundary line is obtained. It should be noted that the adjustment method is to observe the number of horizontal or vertical scribe lines between the sheet boundary line and the required sheet boundary line, that is, whether the distance between the two meets the error range. If it meets the error range, the required sheet boundary is moved outward to the actual sheet boundary line, and no cutting is required. If it does not meet the error range, the position of the current required sheet boundary line is adjusted outward or not adjusted according to the actual situation until the overall error range is met. This observation and adjustment method is more intuitive because the equidistant scribe lines can be used as a measurement basis and reference standard, thereby improving work efficiency. The scribing method can achieve rapid local cutting-free, which can save debugging time while ensuring cutting accuracy. Cutting-free treatment can be performed on areas with low accuracy requirements or gentle forming stretching, which can reduce the cutting length, effectively reduce cutting time, increase cutting cycle, save equipment energy, greatly improve work efficiency and reduce production costs.

[0022] It should be noted in advance that, in this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A rapid, localized, non-cutting method for automotive thermoformed parts, characterized in that, Includes the following steps: S1. Use CAD software to confirm the starting and ending points of the material cutting; S2. Use laser cutting equipment to scribing lines in the non-cutting area of ​​the material sheet; S3. Determine the final required sheet boundary line based on the scribing lines of the non-cutting area and the actual sheet boundary line; S4. Cut according to the determined required material sheet boundary line; perform no-cut treatment in areas where the part boundary accuracy requirement is low or the forming stretching is gentle; in step S2, the scribing lines in the no-cut area of ​​the material sheet include several horizontal scribing lines and several vertical scribing lines, and the horizontal scribing lines and vertical scribing lines are interlaced; in step S3, the required material sheet boundary line is located within the scribing lines of the no-cut area.

2. The rapid local non-cutting method for automotive thermoformed parts according to claim 1, characterized in that, The distance between adjacent transverse etched lines is equal to the distance between adjacent longitudinal etched lines.

3. The rapid local non-cutting method for automotive thermoformed parts according to claim 2, characterized in that, The distance between adjacent transverse scribe lines and the distance between longitudinal scribe lines are both 1-3 mm.

4. The rapid local non-cutting method for automotive thermoformed parts according to claim 1, characterized in that, In step S3, the actual material sheet boundary line refers to the boundary line of the material sheet before it is cut, and the required material sheet boundary line refers to the boundary line of the material sheet after it is cut.

5. The rapid local non-cutting method for automotive thermoformed parts according to claim 4, characterized in that, The method for determining the required boundary line in step S3 is as follows: S31. Measure whether the distance between the required material sheet boundary line and the actual material sheet boundary line is within the allowable error range; S32. Adjust the position of the required sheet boundary line locally according to the measured value until the complete required sheet boundary line is obtained.

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