Cold knife weakening mould

Abstract

The utility model relates to the technical field of automobile dashboard skin weakening, in particular to a cold knife weakening mould which comprises a profiling block, a weakening block and a working table, the profiling block is installed on the upper surface of the working table, the upward face of the profiling block is a working face, the weakening block is installed on the working face of the profiling block, and the working table is installed on the working face of the weakening block. The weakening block and the workbench are further provided with an eddy current assembly used for measuring the residual thickness of the cold knife after weakening. According to the utility model, the weakening line residual thickness of the automobile dashboard skin after the cold knife can be detected through the eddy current assembly, so that the poor weakening line residual thickness can be found in time, and the safety of the performance of an air bag can be controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of weakening the surface of automobile instrument panels, and more specifically, to a cold knife weakening mold. Background Art

[0002] As consumers' demand for interior decoration upgrades, soft instrument panels are increasingly used. Soft instrument panels are generally composed of a skin, a soft foam layer and a plastic frame. In order to ensure the smooth opening of the co-pilot airbag, the skin in the co-pilot airbag area of ​​the instrument panel must be weakened. There are many methods for weakening the skin, but the most widely used is cold knife weakening. Ensuring the residual thickness and position of the weakening line of the cold knife weakening process is an important link to ensure the smooth opening of the airbag, no excessive splashes, and effective protection of passengers. The working principle of the current conventional cold knife weakening jig is as follows: the skin to be processed is placed on the upper surface of the main and auxiliary profiling blocks of the jig; the main profiling block is integrated with a weakening block, and a through hole is provided on the weakening block. One end of the through hole is connected to a vacuum pump so that the through hole generates negative pressure to suck the skin; the skin in the anti-misalignment area is fixed by mechanical clamping of a push plate, and then the cold knife is used to process the weakening line of its skin. Whether the cold knife processing is in place will affect whether the airbag can be opened normally, so it is necessary to test the residual thickness of the weakened line of the car dashboard after cold knife processing. If the residual thickness of the weakened line exceeds the tolerance, it cannot be detected by manual visual inspection, and can only be measured by destroying the product and using a microscope. Testing one piece per batch per shift cannot identify whether the residual thickness of the weakened line of other products is qualified, which is not conducive to controlling the safety of airbag explosion. The risk of repeated processing of the weakened line is not conducive to controlling the deployment direction of the airbag and the weight of the splash.

[0003] There is a Chinese utility model, application number CN202223501908.X, which discloses a cold knife weakening mold for the epidermis, including a workbench, a nylon profiling block is installed on one side of the upper end surface of the workbench, a main profiling block is installed on the other side of the upper end surface of the workbench, and also includes: inserts 1, 2, 3 and 4 installed on the upper end surface of the main profiling block, a weakening block is embedded and installed on the upper end surface of the main profiling block, a sensor cover 1 installed on one side of the upper end surface of the main profiling block, and a sensor cover 2 on the other side of the upper end surface of the main profiling block. In the utility model, the device can perform a hole-punching operation on the raw material epidermis through a punching piece, and weaken the epidermis through a weakening device. At the same time, a through hole is opened at the weakening block, and an air pump is connected to one end of the through hole, so that the through hole generates negative pressure, which can absorb the raw material epidermis, and then the epidermis is weakened and cut by a cold knife, so that the epidermis can be stable during the processing to prevent shaking and processing deviation.

[0004] In the above technical solution, there is a lack of detection equipment for the residual thickness of the weakening line during the cold knife weakening process of the car dashboard surface, making it difficult to control the cold knife weakening processing effect in real time, and the car dashboard surface can only be tested after the processing is completed. On the one hand, there is a risk of unqualified products flowing out, and on the other hand, it is difficult to adjust the cold knife in time due to the inability to achieve real-time detection. There is a time difference between the cold knife processing deviation and the discovery of unqualified weakening of the car dashboard surface. During this time difference, the cold knife will continue to process the car dashboard surface, resulting in a large number of unqualified products, so that these products can only be discarded or reprocessed, resulting in increased manufacturing costs or serious slowdowns in processing progress. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a cold knife weakening jig, which performs real-time detection of the residual thickness of the weakened line of the automobile instrument panel surface after cold knife cutting by arranging an eddy current sensor, thereby ensuring that the poor residual thickness of the weakened line can be discovered in time, which is beneficial to controlling the safety of the airbag performance and avoiding the problems of unqualified products flowing out, waste of raw materials and rework of unqualified products causing slow production efficiency due to the failure to timely discover the unqualified residual thickness of the weakened line of the automobile instrument panel surface.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a cold knife weakening mold, including a profiling block, a weakening block and a workbench, the profiling block is installed on the workbench, the profiling block has a working surface facing upward, the weakening block is installed on the working surface, the upper surface of the weakening block is flush with the working surface, and the weakening block is also installed with an eddy current sensor for measuring the residual thickness of the product after cold knife weakening.

[0007] In the technical scheme, when weakening the surface of the car dashboard, the car dashboard is first placed on the upper surface of the profiling block. The shape of the working surface of the profiling block matches the shape of the car dashboard, which ensures the stability of the car dashboard during processing, and does not shake due to the different shapes of the contact surface between the car dashboard and the profiling block, which affects the processing position accuracy. A weakening block is arranged on the working surface of the profiling block, and the weakening block can cooperate with the cold knife to perform cold knife processing on the product. At the same time, an eddy current sensor for measuring the residual thickness after the cold knife is weakened is installed on the weakening block and the workbench. The eddy current sensor 4 detects the slight changes of the cold knife tip end in the processing stroke through high-precision and high-speed sampling functions, and then obtains the weakened residual thickness value of the dashboard surface through compensation, realizes the real-time detection of the residual thickness of the weakened line of the car dashboard, and is convenient for timely discovering the problems existing in the cold knife weakening processing. In addition, during the eddy current detection process, it will not affect the normal processing of the cold knife, and there is no need to stop the processing for detection, so that the cold knife processing and the residual thickness of the weakened line are detected at the same time, which improves the processing efficiency.

[0008] Preferably, the eddy current sensor is mounted on the upper surface of the weakened block.

[0009] Preferably, the weakening block includes a weakening block upper shell and a weakening block bottom plate, the weakening block upper shell is detachably mounted on the weakening block bottom plate, the eddy current sensor is mounted on the upper surface of the weakening block upper shell, an installation groove is provided on the working surface of the profiling block, the weakening block bottom plate is mounted in the installation groove of the profiling block, and the top of the weakening block upper shell is flush with the working surface of the profiling block.

[0010] Preferably, a second mounting groove is opened on the upper surface of the weakened block upper shell, the eddy current sensor is installed in the second mounting groove, the notch of the second mounting groove is covered with a cover plate, and the upper surface of the cover plate is flush with the upper surface of the weakened block upper shell.

[0011] Preferably, a vacuum connection port is provided on the bottom plate of the weakened block, an adsorption hole is provided on the upper shell of the weakened block, the vacuum connection port is connected with the adsorption hole, and a sealing strip is also provided at the upper surface edge of the upper shell of the weakened block.

[0012] Preferably, a skin-destroying insert is also provided on the working surface of the profiling block.

[0013] Preferably, the upper surface of the skin-damaging insert is provided with a cross-shaped groove.

[0014] Preferably, a skin fixing component for preventing wrong holes is also provided at the edge of the upper surface of the profiling block.

[0015] Preferably, the epidermis fixing assembly includes a punching piece, a lifting cylinder, a fixing frame and a protective cover, the lower end of the fixing frame is installed on the profiling block, the lifting cylinder is installed on the fixing frame, the telescopic end of the lifting cylinder faces downward, the telescopic end of the lifting cylinder is connected to the punching piece, the protective cover is installed on the fixing frame, the protective cover surrounds the punching piece, a punching hole is arranged on the profiling block corresponding to the punching piece, and a vacuum suction hole is arranged next to the punching hole.

[0016] Preferably, the punching hole is a through hole, and a waste box is provided below the profiling block, and the waste box is located directly below the punching hole.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows: an eddy current sensor is provided, which can detect the residual thickness of the weakened surface of the automobile instrument panel in real time through eddy current, and can timely detect the poor residual thickness of the weakened line without affecting the cold knife weakening process, thereby avoiding the problems of unqualified products flowing out, waste of raw materials, and rework of unqualified products, which slow down production efficiency, etc. due to the unqualified residual thickness of the weakened line of the automobile instrument panel surface that cannot be discovered in time. A groove is provided on the upper shell of the weakening block to accommodate the eddy current sensor, so as to prevent the eddy current sensor from protruding from the weakening block and causing surface deformation of the automobile instrument panel surface. A destruction insert is provided on the profiling block, which cooperates with the cold knife to destroy the automobile instrument panel surface when an abnormality occurs in the cold knife weakening process, so as to avoid the outflow of unqualified products. An anti-mistaken hole surface fixing component is provided, which optimizes the conventional push plate mechanical clamping into a vacuum adsorption fixation with a simpler and more reliable structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the cold knife weakened mold of the utility model;

[0019] Figure 2 It is a rear view of the cold knife weakening mold of the utility model;

[0020] Figure 3 It is a three-dimensional diagram of the weakened block of the cold knife weakened tire jig of the utility model;

[0021] Figure 4 It is a three-dimensional diagram of the breaking insert of the cold knife weakening mold of the utility model;

[0022] Figure 5 yes Figure 1 A partial enlarged view of point A in the middle.

[0023] In the attached drawings: 1. profiling block; 2. weakening block; 3. workbench; 4. eddy-electric assembly; 5. destroying insert; 6. anti-mistaken hole surface fixing assembly; 11. punching hole; 12. vacuum suction hole; 13. waste box; 14. working surface; 21. weakening block upper shell; 22. weakening block bottom plate; 23. sealing strip; 41. eddy current sensor; 42. eddy-electric amplifier; 51. cross-shaped groove; 61. punching part; 62. lifting cylinder; 63. fixing frame; 64. protective cover; 221. vacuum connection port. DETAILED DESCRIPTION

[0024] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0025] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0026] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0027] Example 1

[0028] like Figure 1 As shown, a cold knife weakening jig includes a profiling block 1, a weakening block 2 and a workbench 3. The profiling block 1 is installed on the workbench 3. The profiling block 1 has a working surface 14 facing upward. The weakening block 2 is installed on the working surface 14. The upper surface of the weakening block 2 is flush with the working surface 14. The weakening block 2 is also installed with an eddy current sensor 4 for measuring the residual thickness of the product after cold knife weakening. When weakening the surface of the car dashboard, the car dashboard is first placed on the working surface 14 of the profiling block 1. The shape of the working surface 14 matches the shape of the car dashboard, which ensures the stability of the car dashboard during the processing, and will not shake due to the different shapes of the contact surface between the car dashboard and the profiling block 1, affecting the processing position accuracy. The weakening block 2 is arranged on the working surface 14 of the profiling block 1, and the weakening block 2 can cooperate with the cold knife to perform cold knife processing on the product. At the same time, the eddy current sensor 4 for measuring the residual thickness after cold knife weakening is installed on the weakening block 2 and the workbench 3. The eddy current sensor 4 detects the slight changes in the cold knife tip during the processing stroke through high-precision and high-speed sampling functions, and then obtains the weakened residual thickness value of the instrument panel surface through compensation, realizing real-time detection of the residual thickness of the weakened line of the automobile instrument panel, which is convenient for timely discovery of problems in the cold knife weakening processing. In addition, during the eddy current detection process, it will not affect the normal processing of the cold knife, and there is no need to stop the processing for detection, so that the cold knife processing and the residual thickness of the weakened line are detected at the same time, which improves the processing efficiency.

[0029] like Figure 1 As shown, the eddy current sensor 4 is installed on the upper surface of the weakened block 2. During cold knife processing, the upper surface of the weakened block 2 is in direct contact with the product. Setting the eddy current sensor 4 on the upper surface of the weakened block 2 is conducive to shortening the distance between the eddy current sensor 4 and the product, making it easier for the eddy current sensor 4 to detect the eddy current on the surface of the product.

[0030] like Figure 3 As shown, the weakened block 2 includes a weakened block upper shell 21 and a weakened block bottom plate 22. The weakened block upper shell 21 is detachably mounted on the weakened block bottom plate 22. The eddy current sensor 4 is mounted on the upper surface of the weakened block upper shell 21. A mounting groove is provided on the working surface 14 of the profiling block 1. The weakened block bottom plate 22 is mounted in the mounting groove of the profiling block 1. The upper surface of the weakened block upper shell 21 is flush with the working surface of the profiling block 1. The space between the weakened block upper shell 21 and the weakened block bottom plate 22 can be used to connect the eddy current sensor 42 mounted on the upper surface of the weakened block upper shell 21. Therefore, the weakened block upper shell 21 is detachably mounted on the weakened block bottom plate 22, which is convenient for later maintenance and replacement of the eddy current sensor 4. An installation groove is provided on the working surface of the profiling block 1, and the weakening block bottom plate 22 is installed in the installation groove of the profiling block 1. The upper surface of the weakening block upper shell 21 is flush with the working surface of the profiling block 1, thus ensuring the integrity of the working surface of the profiling block 1, and the weakening block 2 will not protrude from the working surface and cause deformation of the surface of the automobile instrument panel.

[0031] like Figure 3 As shown, a second mounting groove is provided on the upper surface of the weakened block upper shell 21, and the eddy current sensor 4 is installed in the second mounting groove. The notch of the second mounting groove is also covered with a cover plate, and the upper surface of the cover plate is flush with the upper surface of the weakened block upper shell 21. The second mounting groove 221 provides a placement space for the eddy current sensor 42, which prevents the eddy current sensor 42 from protruding from the upper surface of the weakened block upper shell 21 and causing deformation of the surface of the car dashboard. The notch of the second mounting groove is also covered with a cover plate, which protects the eddy current sensor 42 and prevents the outside world from colliding with the eddy current sensor 42 and causing damage.

[0032] Example 2

[0033] This embodiment is similar to the above-mentioned embodiment 1, except that: Figure 3 As shown, a vacuum connection port 221 is provided on the weakening block bottom plate 22, and an adsorption hole 24 is provided on the weakening block upper shell 21, and the vacuum connection port 221 is connected to the adsorption hole 24, and a sealing strip 23 is also provided at the edge of the upper surface of the weakening block upper shell 21. The vacuum connection port 221 can be connected to an external vacuum system, and the air around the weakening block 21 is sucked out through the vacuum interface 221 and the adsorption hole provided on the weakening block upper shell 21 to form a vacuum state, and the surface of the car dashboard is firmly adsorbed on the upper surface of the weakening block upper shell 21, so as to avoid displacement and deformation of the surface of the car dashboard during the cold knife weakening process, resulting in a decrease in processing accuracy. A sealing strip 23 is also provided at the edge of the upper surface of the weakening block upper shell 21, which ensures the sealing between the weakening block upper shell 21 and the surface of the car dashboard, and ensures the adsorption effect of vacuum adsorption.

[0034] like Figure 1As shown, the working surface of the profiling block 1 is also provided with a skin-damaging insert 5. When the cold knife weakening process results in a defective product, the skin of the car dashboard needs to be damaged to prevent the defective product from flowing out. When the cold knife damages the skin of the car dashboard, it will inevitably extend out of the skin of the car dashboard, causing damage to the working surface of the profiling block 1. Therefore, the working surface of the profiling block 1 is specially provided with a skin-damaging insert 5, and when the cold knife damages the skin of the car dashboard, it contacts the skin-damaging insert 5, and will not damage the working surface of the profiling block 1.

[0035] like Figure 4 As shown, the upper surface of the skin-breaking insert 5 is provided with a cross-shaped groove 51. When the cold knife destroys the skin of the automobile instrument panel, the skin of the automobile instrument panel can be scratched along the cross-shaped groove 51 on the upper surface of the skin-breaking insert 5, and the working surface 14 will not be damaged.

[0036] Example 3

[0037] This embodiment is similar to the above-mentioned embodiment 1, except that: Figure 1 As shown, a surface fixing component 6 for preventing wrong holes is also provided at the edge of the upper surface of the profiling block 1. While performing the cold knife processing, it is also necessary to open the surface of the automobile instrument panel to distinguish whether the surface has been weakened and prevent the unweakened surface from flowing into the next process. The surface fixing component 6 for preventing wrong holes can fix the surface of the automobile instrument panel around the opening of the anti-error hole and punch out the anti-error hole.

[0038] like Figure 5 As shown, the skin fixing assembly 6 includes a punching piece 61, a lifting cylinder 62, a fixing frame 63 and a protective cover 64. The lower end of the fixing frame 63 is mounted on the profiling block 1. The lifting cylinder 62 is mounted on the fixing frame 63. The telescopic end of the lifting cylinder 62 faces downward. The telescopic end of the lifting cylinder 62 is connected to the punching piece 61. The protective cover 64 is mounted on the fixing frame 63. The protective cover 64 surrounds the punching piece 61. A punching hole 11 is provided on the profiling block 1 at a position corresponding to the punching piece 61, and a vacuum suction hole 12 is provided next to the punching hole 11. When punching is not required, the lifting cylinder 62 is in a retracted state, and the punching piece 61 is away from the profiling block 1. When it is necessary to punch an error-proof hole, the vacuum suction hole 12 is activated to absorb the skin of the car dashboard near the preset punching position to prevent the skin of the car dashboard from shifting during the punching process and causing an inaccurate punching position. Then the lifting cylinder 62 is extended, and the telescopic end of the lifting cylinder 62 approaches the position of the profiling block 1, driving the punching piece 61 to move, and finally inserting the punching piece 61 into the punching hole 11, so as to achieve the anti-mistaken hole punching of the surface of the automobile instrument panel placed on the profiling block 1. The protective cover 64 surrounds the punching piece 61 to ensure that the punching operation is carried out in a relatively independent space, avoiding possible mechanical damage.

[0039] like Figure 2 , Figure 5 As shown, the punching hole 11 is a through hole, and a waste box 13 is provided below the profiling block 1, and the waste box 13 is located directly below the punching hole 11. When the punching is completed, the waste generated by the punching can fall directly into the waste box 13 through the punching hole 11, which is convenient for centralized collection of the punching waste.

[0040] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A cold knife weakening mold, characterized in that: The invention comprises a profiling block (1), a weakening block (2) and a workbench (3), wherein the profiling block (1) is mounted on the workbench (3), the profiling block (1) has a work surface (14) facing upward, the weakening block (2) is mounted on the work surface (14), the upper surface of the weakening block (2) is flush with the work surface (14), and the weakening block (2) is also mounted with an eddy current sensor (4) for measuring the residual thickness of the product after cold knife weakening.

2. A cold knife weakened jig according to claim 1, characterized in that: The eddy current sensor (4) is mounted on the upper surface of the weakened block (2).

3. A cold knife weakened jig according to claim 2, characterized in that: The weakening block (2) comprises a weakening block upper shell (21) and a weakening block bottom plate (22); the weakening block upper shell (21) is detachably mounted on the weakening block bottom plate (22); the eddy current sensor (4) is mounted on the upper surface of the weakening block upper shell (21); a mounting groove is provided on the working surface (14) of the profiling block (1); the weakening block bottom plate (22) is mounted in the mounting groove of the profiling block (1); and the upper surface of the weakening block upper shell (21) is flush with the working surface (14) of the profiling block (1).

4. A cold knife weakened jig according to claim 3, characterized in that: A second mounting groove is provided on the upper surface of the weakening block upper shell (21), and the eddy current sensor (4) is mounted in the second mounting groove. The notch of the second mounting groove is covered with a cover plate, and the upper surface of the cover plate is flush with the upper surface of the weakening block upper shell (21).

5. The cold knife weakening jig according to claim 3, characterized in that: The weakened block bottom plate (22) is provided with a vacuum connection port (221), the weakened block upper shell (21) is provided with an adsorption hole (24), the vacuum connection port (221) is connected to the adsorption hole (24), and a sealing strip (23) is also provided at the upper surface edge of the weakened block upper shell (21).

6. The cold knife weakening jig according to claim 1, characterized in that: A skin-destroying insert (5) is also provided on the working surface (14) of the profiling block (1).

7. A cold knife weakened jig according to claim 6, characterized in that: The upper surface of the skin-damaging insert (5) is provided with a cross-shaped groove (51).

8. The cold knife weakening jig according to claim 1, characterized in that: A skin fixing component (6) for preventing wrong holes is also provided at the edge of the upper surface of the profiling block (1).

9. A cold knife weakened jig according to claim 8, characterized in that: The epidermis fixing assembly (6) comprises a punching piece (61), a lifting cylinder (62), a fixing frame (63) and a protective cover (64); the lower end of the fixing frame (63) is mounted on the profiling block (1); the lifting cylinder (62) is mounted on the fixing frame (63); the telescopic end of the lifting cylinder (62) faces downward; the telescopic end of the lifting cylinder (62) is connected to the punching piece (61); the protective cover (64) is mounted on the fixing frame (63); the protective cover (64) surrounds the punching piece (61); a punching hole (11) is provided on the profiling block (1) at a position corresponding to the punching piece (61); a vacuum suction hole (12) is provided next to the punching hole (11).

10. A cold knife weakened jig according to claim 9, characterized in that: The punching hole (11) is a through hole. A waste box (13) is arranged below the profiling block (1), and the waste box (13) is located directly below the punching hole (11).

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