Method for producing tear lines along predetermined contours in planar workpieces
A tear line, plane technology, used in manufacturing tools, metal processing equipment, welding/welding/cutting items, etc., to solve problems such as undetected residual wall thickness
Active Publication Date: 2021-06-22
詹诺普蒂克自动化技术有限公司
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Problems solved by technology
[0012] The method known from DE 10 2014 108 133 B4 differs from the current method in that a higher energy input is introduced in an alternating manner into the first part of the tear line than into the second part and is transmitted out The laser radiation caused the signal to pass through the residual wall of the first part, from which it was concluded that the wall thickness of the residual wall of the second part was not detected
Method used
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Embodiment Construction
[0031] figure 1 A schematic diagram of a suitable device known from the prior art is shown for the implementation.
[0032] The device comprises: a laser generator 1, which emits laser pulses 1.1 (pulsed laser beam) with a pulse amplitude; a laser scanner 2, which guides the laser pulses 1.1 within the working area A to the removal position a 1 ,...,a n ; and sensor array 3, wherein sensor 3 1 ,...,3 m are arranged in matrix form below the working area A, and each has an aperture angle, which for at least one of the sensors 3 1 ,...,3 m is large enough to detect an incident in the working area A at any removal position a 1 ,...,a n The pulse amplitude or partial pulse amplitude of the laser pulse 1.1. The specific design and arrangement of the sensor 3 allows the transmitted portion of the pulse amplitude to be removed from any point within the working area A and thus at any position a 1 ,...,a n , enabling the use of the device without having to be configured for a s...
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The invention relates to a method and a device for producing a tear line along a predetermined contour in a planar workpiece, the tear line being created by laser removal of material. The method described creates tear lines on planar workpieces by removing material with a pulsed laser, where the machining cycle is preceded by the generation and storage of a reference signal curve (f(R a )) method step, the reference signal curve consists of the profile along the tear line at the removal position (a 1 ,...,a n ) on the reference signal (R a ) is formed, which results in the pulse amplitude of the pulsed laser. Using the measurement signal (M a ) to achieve the reference signal (R a ) of the corresponding predetermined percentage, or the measurement signal (M a ) achieves a distance from the reference signal (R a ) as the absolute distance for each removal location (a 1 ,...,a n ) of the spatially resolved inactivation criterion, the measurement signal (M a ) from the corresponding removal position (a 1 ,...,a n ) at the transmitted out portion of the pulse amplitude is obtained.
Description
technical field [0001] The invention relates to a method for producing a tear line in a planar workpiece along a predetermined contour, the contour describing a series of removal positions. Background technique [0002] It is now common in many fields of application to introduce an integral tear line into planar workpieces in order to open these workpieces along said tear line if desired. Examples include tear and separation aids in packaging materials, medical aids, stationery, or safety clothing. Particularly high-quality requirements apply to tear lines in the airbag cover which, on the one hand, should not be visible and, on the other hand, allow the airbag to penetrate unhindered when the airbag is activated. [0003] Due to this specificity, the prior art is almost exclusively described with reference to the airbag cover with regard to the methods for producing the tear lines. Accordingly, the description of the methods disclosed herein will also be explained with re...
Claims
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IPC IPC(8): B23K26/38B23K26/70B23K26/03B23K26/359
CPCB23K26/0622B23K26/082B23K26/364B23K26/359B23K26/702B23K26/03B23K26/38B23K26/032B23K2103/34B23K2103/38B23K26/382B23K2103/42B23K26/0626
Inventor 沃尔特·卢策马丁·格里贝尔于尔根·魏瑟尔弗兰克·塞德尔
Owner 詹诺普蒂克自动化技术有限公司