CN-122016111-A - Shell closing process monitoring method and buckling monitoring equipment

CN122016111ACN 122016111 ACN122016111 ACN 122016111ACN-122016111-A

Abstract

The invention discloses a shell closing process monitoring method and buckling monitoring equipment, and relates to the technical field of assembly process monitoring, wherein the shell closing process monitoring method comprises the steps of acquiring displacement values and pressure values detected by a displacement sensor and a pressure sensor correspondingly in real time on an abutting stroke of an abutting part; and comparing the actual pressure displacement curve with a theoretical pressure displacement curve to judge whether the state of the buckling shell is abnormal or not. According to the technical scheme provided by the invention, the actual pressure displacement curve is obtained according to the displacement and stress conditions of the components during assembly, and then the actual pressure displacement curve is compared with the theoretical pressure displacement curve to analyze whether abnormal conditions exist, so that the assembly conditions of the two components mutually matched by the buckle can be detected and monitored.

Inventors

YUAN SHOU
ZHAO CHENGRUI
ZHANG CHUANKUN

Assignees

歌尔股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260106

Claims (10)

1. The shell closing process monitoring method is applied to buckling monitoring equipment and is characterized by comprising a driving part, a pressure sensor and a propping part which are sequentially connected from top to bottom, wherein the driving part is used for driving the propping part to descend and is used for pressing a buckling shell, the buckling monitoring equipment further comprises a control device and a displacement sensor, the displacement sensor is used for detecting displacement of the propping part, and the control device is respectively and electrically connected with the driving part, the pressure sensor and the displacement sensor: The shell closing process monitoring method comprises the following steps: On the propping stroke of the propping part, the displacement value and the pressure value which are detected by the displacement sensor and the pressure sensor correspondingly are obtained in real time; Generating an actual pressure displacement curve according to the displacement value and the pressure value obtained in real time; and comparing the actual pressure displacement curve with a theoretical pressure displacement curve to judge whether the state of the buckling shell is abnormal or not.
2. The method of claim 1, wherein the pressure displacement curve has a curve end point corresponding to an end point position of the propping stroke; comparing the actual pressure displacement curve with a theoretical pressure displacement curve to determine whether the buckling state of the buckling shell is abnormal, wherein the method comprises the following steps: acquiring an actual end point displacement value corresponding to a curve end point of the actual pressure displacement curve; calculating a displacement difference value of the actual end point displacement value and a theoretical end point displacement value corresponding to the theoretical pressure displacement curve end point; and judging whether the buckling shell is assembled in place or not according to the displacement difference value.
3. The method of claim 2, wherein the step of determining whether the snap-in housing is assembled in place based on the displacement difference comprises: comparing the absolute value of the displacement difference value with a first set value; When the absolute value of the displacement difference value is smaller than or equal to the first set value, judging that the buckling shell is assembled in place; and when the absolute value of the displacement difference value is larger than the first set value, judging that the buckling shell is not assembled in place.
4. The method of claim 1, wherein the propping stroke comprises a locking stroke segment; comparing the actual pressure displacement curve with a theoretical pressure displacement curve to determine whether the buckling state of the buckling shell is abnormal, wherein the method comprises the following steps: Acquiring an actual locking curve section corresponding to the actual pressure displacement curve and the locking stroke section and a theoretical locking curve section corresponding to the theoretical pressure displacement curve and the locking stroke section; and carrying out pattern matching on the actual locking curve section and the theoretical locking curve section so as to judge the buckle deformation recovery condition of the buckling shell.
5. The method of claim 1, wherein the propping stroke comprises a snap-fit stroke segment; comparing the actual pressure displacement curve with a theoretical pressure displacement curve to determine whether the buckling state of the buckling shell is abnormal, wherein the method comprises the following steps: acquiring an actual clamping curve section corresponding to the actual pressure displacement curve and the clamping stroke section and a theoretical buckling curve section corresponding to the theoretical pressure displacement curve and the clamping stroke section; And comparing the actual buckling curve section with the theoretical buckling curve section, and judging the quality of the buckling structure of the buckling shell according to a comparison result.
6. The method of claim 5, wherein comparing the actual snap curve segment with the theoretical snap curve segment, and determining the quality of the snap structure of the snap shell based on the comparison comprises: Acquiring an actual maximum pressure value F1 corresponding to the end point of the actual clamping curve section and a theoretical maximum pressure value F2 corresponding to the end point of the theoretical clamping curve section; calculating the difference between F1 and F2; When the difference value between F1 and F2 is smaller than the second set value, judging that the buckling shell is broken or smaller in size; when the difference between F1 and F2 is larger than the third set value, determining that burrs, size interference or over-tight design exist on the buckling shell.
7. The method of claim 5, wherein comparing the actual snap curve segment with the theoretical snap curve segment, and determining the quality of the snap structure of the snap shell based on the comparison comprises: Acquiring an actual slope of the actual clamping curve segment and a theoretical slope of the theoretical buckling curve segment; comparing the actual slope with the theoretical slope; And judging the quality state of the buckling shell according to the comparison result.
8. The method of claim 7, wherein the engagement stroke segment has a first stroke segment and a second stroke segment sequentially disposed along the abutment stroke, the actual slope comprises a first actual slope corresponding to the first stroke segment and a second actual slope corresponding to the second stroke segment, the theoretical slope comprises a first theoretical slope corresponding to the first stroke segment and a second theoretical slope corresponding to the second stroke segment; And judging the quality state of the buckling shell according to the comparison result, wherein the step comprises the following steps of: And when the absolute value of the difference value between the first actual slope and the first theoretical slope is larger than a fourth set value, and the absolute value of the difference value between the second actual slope and the second theoretical slope is larger than a fifth set value, judging that the guiding structure of the buckling shell is abnormal or the buckling shell is placed abnormally.
9. A snap-fit monitoring device, comprising: The buckling and propping device is provided with a driving part and a propping part, wherein the driving part drives the propping part to move, so that the propping part is provided with a propping stroke for propping the buckling shell; the displacement sensor is used for detecting the propping displacement of the propping part; The pressure sensor is used for detecting acting force applied to the propping part; a control device electrically connected with the displacement sensor, the pressure sensor and the driving part, and Stored on the control device and executable thereon are the snap-fit monitoring device control program configured to implement the steps of the method of monitoring a closed shell process as defined in any one of claims 1 to 8.
10. The snap-fit monitoring device of claim 9, wherein the snap-fit monitoring device further comprises: the alarm device is used for giving an alarm when detecting that the state of the buckling shell is abnormal; the display device is used for displaying corresponding data of the buckling shell; the alarm device and the display device are electrically connected with the control device.

Description

Shell closing process monitoring method and buckling monitoring equipment Technical Field The invention relates to the technical field of assembly process monitoring, in particular to a shell closing process monitoring method and buckling monitoring equipment. Background In the structural design of products in consumer electronics industry, automobile electronics industry and the like, the fastening fixing mode directly saves the purchase, inventory and management costs of fasteners (such as screws) because no additional connecting piece is needed, and has the advantages of attractive appearance, high reliability and more adoption. The traditional assembly relies on the hand feeling or the audible sound of workers, can not be quantified, can not monitor the clamping process of the buckle, and can not confirm whether the buckle is clamped or not. The forces of the card and the process, which lead to the possibility of breaking, whitening or permanent deformation of the snap or its counterpart (e.g. the housing) under excessive assembly forces, are not known. Disclosure of Invention The invention mainly aims to provide a shell closing process monitoring method and buckling monitoring equipment, which aim to detect and monitor the assembly condition of two parts mutually matched by buckles. In order to achieve the above purpose, the invention provides a shell closing process monitoring method, which is applied to buckling monitoring equipment, wherein the buckling monitoring equipment comprises a driving part, a pressure sensor and a propping part which are sequentially connected from top to bottom, the driving part is used for driving the propping part to descend for pressing a buckling shell, and the buckling monitoring equipment further comprises a control device, The displacement sensor is used for detecting the butt displacement, and the control device is electrically connected with the driving part, the pressure sensor and the displacement sensor respectively: The shell closing process monitoring method comprises the following steps: On the propping stroke of the propping part, the displacement value and the pressure value which are detected by the displacement sensor and the pressure sensor correspondingly are obtained in real time; Generating an actual pressure displacement curve according to the displacement value and the pressure value obtained in real time; and comparing the actual pressure displacement curve with a theoretical pressure displacement curve to judge whether the state of the buckling shell is abnormal or not. In one embodiment, the pressure displacement curve has a curve end point corresponding to an end point position of the abutment stroke; comparing the actual pressure displacement curve with a theoretical pressure displacement curve to determine whether the buckling state of the buckling shell is abnormal, wherein the method comprises the following steps: acquiring an actual end point displacement value corresponding to a curve end point of the actual pressure displacement curve; calculating a displacement difference value of the actual end point displacement value and a theoretical end point displacement value corresponding to the theoretical pressure displacement curve end point; and judging whether the buckling shell is assembled in place or not according to the displacement difference value. In one embodiment, the step of determining whether the fastening shell is assembled in place according to the displacement difference comprises: comparing the absolute value of the displacement difference value with a first set value; When the absolute value of the displacement difference value is smaller than or equal to the first set value, judging that the buckling shell is assembled in place; and when the absolute value of the displacement difference value is larger than the first set value, judging that the buckling shell is not assembled in place. In one embodiment, the abutment stroke comprises a locking stroke segment; comparing the actual pressure displacement curve with a theoretical pressure displacement curve to determine whether the buckling state of the buckling shell is abnormal, wherein the method comprises the following steps: Acquiring an actual locking curve section corresponding to the actual pressure displacement curve and the locking stroke section and a theoretical locking curve section corresponding to the theoretical pressure displacement curve and the locking stroke section; and carrying out pattern matching on the actual locking curve section and the theoretical locking curve section so as to judge the buckle deformation recovery condition of the buckling shell. In an embodiment, the propping stroke comprises a clamping stroke section; comparing the actual pressure displacement curve with a theoretical pressure displacement curve to determine whether the buckling state of the buckling shell is abnormal, wherein the method comprises the following steps: acquiring a