CN-122020876-A - Glass key molding design and control method and device

CN122020876ACN 122020876 ACN122020876 ACN 122020876ACN-122020876-A

Abstract

The invention discloses a glass key forming design and control method and device. The method comprises the steps of obtaining material attribute parameters of a glass substrate and target touch parameters of a key to be formed, carrying out inverse solution by using a preset plate shell mechanical model, calculating the residual thickness of a glass key thinning area and the width of a suspension area required by meeting target handfeel, calculating lateral erosion compensation quantity according to technological characteristic parameters of processing equipment, inwards shrinking the original size of a key outline to generate an opening area for processing mask pattern data, and generating equipment control instructions according to the mask pattern data and the residual thickness of the thinning area, and controlling the processing equipment to remove materials on the glass substrate to form the key thinning area with the preset thickness. The method realizes the accurate conversion from touch demand to processing instruction, and effectively solves the problems of the prior art that the design depends on experience trial and error, the processing precision is low and the hand feeling consistency of the finished product is poor.

Inventors

LIN ZHIJIAN
DING LI
WANG HAI
ZENG XINYONG

Assignees

康惠（惠州）半导体有限公司

Dates

Publication Date: 20260512
Application Date: 20251230

Claims (10)

1. The glass key forming design and control method is characterized by comprising the following steps: acquiring material attribute parameters of a glass substrate and target touch parameters of a key to be formed, wherein the target touch parameters comprise a key position, a key outline shape, target pressing force and target pressing stroke; Based on the material attribute parameters and the target touch parameters, carrying out inverse solution by using a preset plate shell mechanical model, and calculating the cross-section structure parameters of the glass key required by meeting the target pressing force and the target pressing stroke, wherein the cross-section structure parameters comprise the residual thickness of a thinning area and the width of a suspending area; performing process compensation calculation on the key outline shape and the section structure parameter according to preset process characteristic parameters of processing equipment to generate processing mask pattern data, wherein the processing mask pattern data comprises compensation quantity; And generating corresponding equipment control instructions according to the processing mask pattern data and the residual thickness of the thinning area, and transmitting the corresponding equipment control instructions to processing equipment so as to control the processing equipment to remove materials on the glass substrate, thereby forming an integrated glass key.
2. The method for designing and controlling glass key molding according to claim 1, wherein the calculating the glass key section structure parameters required for satisfying the target pressing force and the target pressing stroke based on the material property parameters and the target touch parameters by using a preset plate shell mechanical model to perform inverse solution specifically comprises: establishing a thin plate large deflection equation comprising Young modulus, poisson ratio and thickness variable of the glass substrate; substituting the target pressing force and the target pressing stroke into the sheet large deflection equation, and iteratively calculating a corresponding theoretical residual thickness value; And checking the stress distribution of the theoretical residual thickness value under the maximum travel, if the maximum stress exceeds the breaking strength threshold value in the material property parameter, automatically adjusting the width of the suspension area until the stress meets the safety coefficient requirement, and taking the finally determined value as the residual thickness of the thinning area.
3. The method for designing and controlling glass key molding according to claim 1, wherein the performing process compensation calculation on the key outline shape and the section structure parameter according to the preset process characteristic parameter of the processing equipment to generate processing mask pattern data specifically comprises: Obtaining the undercut factor of the currently used etching solution Target etch depth Wherein the target etch depth The difference between the original thickness of the glass substrate and the residual thickness of the thinning area is obtained; According to the formula Calculating lateral erosion compensation amount ; Inwardly shrinking the original dimension of the key outline shape by the lateral erosion compensation amount And generating an opening area pattern in the processing mask pattern data to offset the key thinning area expansion effect caused by lateral corrosion in the processing process.
4. The method for designing and controlling glass key molding according to claim 3, wherein the performing process compensation calculation on the key outline shape and the section structure parameter according to the preset process characteristic parameter of the processing device to generate processing mask pattern data, further comprises: Identifying geometric feature points in the key outline shape, and when the geometric feature points are identified as corner points which are not in smooth connection, superposing preset geometric correction graphic primitives at the positions of the corresponding corner points of the processing mask graphic data; The geometric correction primitive is used for adjusting the opening area at the corner point so as to compensate the difference between the corner point position and other straight edge positions in etching rate and prevent the profile of the processed thinning area from being distorted.
5. The method for designing and controlling the molding of the glass key according to claim 1, wherein the generating the corresponding device control command specifically comprises: Generating first layer control data for controlling the photoetching equipment to form a photoresist pattern corresponding to the processing mask pattern data on the surface of the glass substrate; and generating second layer control data for setting a spray pressure parameter, a temperature parameter and an etching duration of the chemical etching equipment, wherein the etching duration is calculated based on the target etching depth and the etching rate monitored in real time.
6. The glass key molding design and control method according to claim 1, further comprising the steps of: acquiring current actual thickness data of the glass substrate in real time through a sensor in the operation process of the processing equipment; Calculating the deviation value of the actual thickness data and the residual thickness of the thinning area; and when the deviation value is smaller than a preset threshold value, generating a machining stopping instruction in real time and sending the machining stopping instruction to the machining equipment.
7. A glass key shaping design and control device, comprising: the data acquisition module is used for acquiring material attribute parameters of the glass substrate and target touch parameters of the key to be formed; the structure calculation module is used for carrying out inverse solution by utilizing a preset plate shell mechanical model based on the material attribute parameters and the target touch parameters, and calculating the structural parameters of the section of the glass key required by meeting the target pressing force and the target pressing stroke, wherein the structural parameters of the section comprise the residual thickness of a thinning area and the width of a suspension area; And the control output module is used for generating corresponding equipment control instructions according to the processing mask pattern data and the residual thickness of the thinning area, and transmitting the corresponding equipment control instructions to processing equipment so as to control the processing equipment to remove materials on the glass substrate, thereby forming an integrated glass key.
8. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor, when executing the program, implements the steps of the glass key shaping design and control method of any one of claims 1 to 6.
9. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when executed by a processor, implements the steps of the glass key shaping design and control method according to any one of claims 1 to 6.
10. A computer program product comprising a computer program which, when executed by a processor, implements the steps of the glass key shaping design and control method of any one of claims 1 to 6.

Description

Glass key molding design and control method and device Technical Field The invention relates to the technical field of glass key manufacturing, in particular to a glass key forming design and control method and device. Background With the development of the trend of integration of the appearance of consumer electronic products, the direct processing of integrated glass keys with physical touch and press feedback on a glass panel has become an industry hotspot. The mainstream process for manufacturing such glass keys generally comprises two key steps, namely firstly, locally thinning, namely, removing materials in a specific key region of a glass substrate by chemical etching or CNC processing to form grooves (or blind holes) with specific residual thickness, thereby constructing an elastic deformation region while maintaining the continuity of the glass, and secondly, hot bending forming, namely, outwards bulging the thinned region by air pressure or a die in a high-temperature softening state to form a convex solid key appearance. However, current glass key designs often rely on engineers' experience or repeated proofing tests. It is difficult for a designer to precisely determine the thickness and the float width of the glass thinning region directly from the "pressing force (e.g., 300 g)" and the "pressing stroke (e.g., 0.15 mm)" required by the customer. It is usually necessary to draw a sample empirically and test the hand feel after processing the sample, and then adjust the design parameters if the hand feel is too hard or too soft. This approach results in long development cycles and difficulty in ensuring consistency of hand feel at mass production. Second, the hand of the key is extremely sensitive to the glass thickness (a thickness error of 0.01mm may result in a force deviation of tens of grams). However, the etching rate is dynamically changed by the concentration of the chemical solution, the temperature, and the duration of use. If the exposure and development are directly performed according to the outline of the design drawing, the aperture of the thinning area can be continuously enlarged along with the increase of the etching depth, so that the size of the finally formed thinning area is larger than the design size. In the subsequent hot bending process, the expansion of the range of the thinning area can directly lead to the enlargement of the key bulge range, the position deviation and the soft hand feeling. At present, the mask opening is manually reduced by experience in CAD software to perform pre-estimation compensation by manpower, so that the method is difficult to adapt to the accurate control requirements of keys with different etching depths and complicated special shapes, and the consistency of finished products is seriously affected. Accordingly, there is a need for improvements in existing glass key production techniques to overcome the shortcomings of the prior art. Disclosure of Invention In order to overcome the problems in the related art, one of the purposes of the invention is to provide a glass key molding design and control method, which realizes automatic and accurate conversion from touch target parameters to processing equipment instructions by establishing a mechanical inverse solution model and closed-loop control of a process compensation algorithm, thereby overcoming the problems that the design in the prior art depends on experience trial and error and the relationship between hand feeling and structure cannot be quantified. A glass key molding design and control method comprises the following steps: acquiring material attribute parameters of a glass substrate and target touch parameters of a key to be formed, wherein the target touch parameters comprise a key position, a key outline shape, target pressing force and target pressing stroke; Based on the material attribute parameters and the target touch parameters, carrying out inverse solution by using a preset plate shell mechanical model, and calculating the cross-section structure parameters of the glass key required by meeting the target pressing force and the target pressing stroke, wherein the cross-section structure parameters comprise the residual thickness of a thinning area and the width of a suspending area; performing process compensation calculation on the key outline shape and the section structure parameter according to preset process characteristic parameters of processing equipment to generate processing mask pattern data, wherein the processing mask pattern data comprises compensation quantity; And generating corresponding equipment control instructions according to the processing mask pattern data and the residual thickness of the thinning area, and transmitting the corresponding equipment control instructions to processing equipment so as to control the processing equipment to remove materials on the glass substrate, thereby forming an integrated glass key. Further, the calculating the gl