Metal edge folding device for automobile safety belt

Abstract

The utility model relates to the technical field of automobile accessory machining, and discloses an automobile safety belt metal edge folding device which comprises a stamping base, a semi-finished product workpiece and a supporting machine frame installed at the top of the stamping base, an edge folding receding groove is formed in the semi-finished product workpiece, and a hydraulic rod is arranged on the inner side of the top of the supporting machine frame in a sleeved mode. The inner side of the top of the stamping base is sleeved with a template, the inner side of the template is sleeved with a composite positioning assembly and an automatic clamping assembly, and a clamping space is formed between an output structure at the top of the automatic clamping assembly and the top face of the template. The multifunctional edge folding stamping module is composed of the template, the composite positioning assembly, the three automatic clamping assemblies and the lifting assembly, and after the multifunctional edge folding stamping module is used in cooperation with a stamping device composed of the stamping base, the supporting rack, the hydraulic rod and the punching head subsequently, automatic limiting clamping, positioning assisting and automatic stamping can be carried out on a preliminarily-punched semi-finished product workpiece; problems in the prior art are solved, and machining efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts processing, in particular to a metal hemming device for automobile safety belts. Background Art

[0002] As one of the most frequently used household transportation tools in modern life, people attach great importance to the safety and comfort of cars during use. In order to ensure the use needs of consumers, researchers in related fields are also optimizing the technology of each car accessory. For example, in the existing technology, during the assembly and use of car seat belts, the cloth belt and metal parts need to be subjected to force and friction. In order to prevent the metal parts from scratching the cloth belt, the metal parts need to be formed with overlapping R angle transition to ensure the installation and comfort of the car seat belts.

[0003] However, the existing process often suffers from the phenomenon of uneven R-angle transition and end face cracking, which leads to huge safety hazards for the entire automobile seat belt. After an in-depth study of the phenomenon of uneven R-angle transition and end face cracking that often occur in the existing process, the applicant found that although the current processing technology of punching, flanging, pre-folding and flattening can meet the production needs, after the punching is formed once, the inner wall of the clearance space has poor secondary pressure resistance and the R-angle is not full, which is the main reason for the uneven R-angle transition and end face cracking. Secondly, most of the punching equipment currently used does not support secondary punching processing for semi-finished product positioning. It can be seen that the technology of related processing of automobile seat belts still needs further improvement. Utility Model Content

[0004] In view of the deficiencies in the prior art, the present invention provides a metal hemming device for a car safety belt, which solves the problems raised by the above-mentioned background technology.

[0005] The utility model provides the following technical solutions: a metal folding device for automobile seat belts, comprising a stamping base, a semi-finished workpiece, and a support frame installed on the top of the stamping base, wherein a folding clearance groove is provided inside the semi-finished workpiece, a hydraulic rod is provided on the inner side of the top of the support frame, a template is provided on the inner side of the top of the stamping base, a composite positioning component and an automatic clamping component are provided on the inner side of the template, and a clamping space is formed between the output structure on the top of the automatic clamping component and the top surface of the template, the semi-finished workpiece is placed in the clamping space and clamped with the top structure of the composite positioning component, a lifting component is provided at the bottom of the template which is transmission-connected to the bottom of the composite positioning component, and the output end of the hydraulic rod is transmission-connected to a punching head aligned with the semi-finished workpiece.

[0006] The inner side of the top structure of the stamping base is provided with a step groove with an open middle part, the template is nested in the step groove, and the side edges of the template and the inner walls of the side edges corresponding to the adjustment groove are installed by screws, the top surface of the template is coplanar with the top surface of the stamping base, and an anti-interference groove is provided in the middle of the template.

[0007] Selected, three through grooves are opened inside the template, the number of the automatic clamping components is three, and the three automatic clamping components are composed of an inverted L-shaped pressure plate and a first electric push rod, one end of the three first electric push rods serves as the output structure of the automatic clamping component and passes through the three through grooves respectively, the other end of the three first electric push rods are respectively connected to the output ends of the three inverted L-shaped pressure plates, and a support seat is installed between the shell surface of the three inverted L-shaped pressure plates and the bottom surface of the template.

[0008] Preferably, the composite positioning assembly includes a hollow base and a positioning hollow seat. The top of the hollow base is fixedly connected to the bottom of the positioning hollow seat and is spatially communicated with each other. The positioning hollow seat can clamp and position the semi-finished workpiece.

[0009] The inner space of the hollow base and the inner space of the positioning hollow seat are combined to form an installation space, an auxiliary support plate is installed in the installation space, three positioning holes are opened on the top of the positioning hollow seat, three U-shaped rods are clamped inside the auxiliary support plate, and buffer springs are installed between the surface of the auxiliary support plate and the middle surface of the three U-shaped rods, one end of the three U-shaped rods respectively passes through the three positioning holes and can be fitted and connected with the inner wall of the overlapped edge groove in the semi-finished workpiece.

[0010] Selectedly, three pressure detectors are installed on the inner wall of the hollow base, and the three pressure detectors are respectively aligned with the other end of the three U-shaped rods and can be fitted and connected. The three U-shaped rods cooperate with the three pressure detectors, and then synchronously press and contact the semi-finished workpiece during the positioning process of the hollow seat and the semi-finished workpiece set, and then change direction to reflect the structural state of the overlapped edge give way groove inside the semi-finished workpiece according to the changes in the pressure data of the three pressure detectors.

[0011] Selectedly, the lifting assembly includes a second electric push rod and an auxiliary bracket fixedly connected to the surface of the second electric push rod shell, the top of the auxiliary bracket is fixedly connected to the bottom surface of the semi-finished workpiece, the output end of the second electric push rod is transmission-connected to the bottom of the hollow base, and the composite positioning assembly can be coplanar with the top surface of the template under the transmission of the second electric push rod. Under the transmission of the lifting assembly, the composite positioning assembly can not only perform preliminary installation and positioning on the semi-finished workpiece, but also automatically move and make way during the stamping process of the semi-finished workpiece.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. The utility model comprises a multi-functional edge-stacking stamping module composed of a template, a composite positioning component, three automatic clamping components and a lifting component. After being combined with a stamping device composed of a stamping base, a support frame, a hydraulic rod and a punching head, it can automatically limit and clamp, position and assist, and automatically stamp the semi-finished workpiece after preliminary punching, solving the problems of the prior art and improving the processing efficiency.

[0014] 2. The independence of the specific structures of the edge-stacking stamping module and the stamping device set in the utility model enables modular replacement of both the stamping device and the edge-stacking stamping module, making it more flexible and practical to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a front view schematic diagram of the structure of the utility model;

[0016] Figure 2 is an enlarged schematic diagram of the template of the structure of the utility model;

[0017] Figure 3 is a bottom view schematic diagram of the template of the structure of the utility model;

[0018] Figure 4 is a top view schematic diagram of the template of the structure of the utility model;

[0019] Figure 5 is a partial cross-sectional view schematic diagram of the composite positioning component of the structure of the utility model;

[0020] Figure 6 is an enlarged schematic diagram of the lifting component of the structure of the utility model.

[0021] In the figure: 1. Stamping base; 2. Semi-finished workpiece; 3. Support frame; 4. Hydraulic rod; 5. Punching head; 6. Template; 7. Composite positioning component; 71. Hollow base; 72. Positioning hollow seat; 73. Auxiliary support plate; 74. U-shaped rod; 75. Buffer spring; 76. Pressure detector; 8. Automatic clamping component; 81. Inverted L-shaped pressing plate; 82. First electric push rod; 9. Lifting component. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to Figure 1-6 , an automotive seat belt metal hemming device, including a stamping base 1, a semi-finished workpiece 2, and a support frame 3 installed on the top of the stamping base 1. There is a hemming relief groove inside the semi-finished workpiece 2. A hydraulic rod 4 is sleeved inside the top of the support frame 3. A template 6 is sleeved inside the top of the stamping base 1. The output end of the hydraulic rod 4 is drivingly connected to a punching head 5 aligned with the semi-finished workpiece 2;

[0024] Inside the top structure of the stamping base 1, a stepped groove with an open middle is formed. The template 6 is nested in the stepped groove, and the side of the template 6 is installed with screws between the corresponding side inner walls of the adjustment groove. The top surface of the template 6 is coplanar with the top surface of the stamping base 1, and an anti-interference groove is provided in the middle of the template 6;

[0025] Inside the template 6, a composite positioning component 7 and an automatic clamping component 8 are sleeved respectively. And a clamping space is formed between the output structure at the top of the automatic clamping component 8 and the top surface of the template 6. The semi-finished workpiece 2 is placed in the clamping space and is clamped with the top structure of the composite positioning component 7. A lifting component 9 drivingly connected to the bottom of the composite positioning component 7 is provided at the bottom of the template 6;

[0026] Three through grooves are formed inside the template 6. The number of the automatic clamping components 8 is three, and the three automatic clamping components 8 are each composed of an inverted L-shaped pressing plate 81 and a first electric push rod 82. One end of the three first electric push rods 82 serves as the output structure of the automatic clamping component 8 and respectively penetrates through the three through grooves. The other ends of the three first electric push rods 82 are respectively drivingly connected to the output ends of the three inverted L-shaped pressing plates 81. Support seats are installed between the housing surfaces of the three inverted L-shaped pressing plates 81 and the bottom surface of the template 6;

[0027] The composite positioning component 7 includes a hollow base 71 and a positioning hollow seat 72. The top of the hollow base 71 is fixedly connected to the bottom of the positioning hollow seat 72 and is in spatial communication. And the positioning hollow seat 72 can clamp and position the semi-finished workpiece 2. The internal space of the hollow base 71 and the internal space of the positioning hollow seat 72 form an installation space. An auxiliary support plate 73 is sleeved inside the installation space. Three positioning holes are formed at the top of the positioning hollow seat 72. Three U-shaped rods 74 are clamped inside the auxiliary support plate 73. And buffer springs 75 are installed between the surface of the auxiliary support plate 73 and the middle surfaces of the three U-shaped rods 74. One end of the three U-shaped rods 74 respectively penetrates through the three positioning holes and can be in fit connection with the inner wall of the hemming relief groove inside the semi-finished workpiece 2;

[0028] Three pressure detectors 76 are installed on the inner wall of the hollow base 71. The three pressure detectors 76 are respectively aligned with the other ends of the three U-shaped rods 74 and can be fitted and connected. The three U-shaped rods 74 cooperate with the three pressure detectors 76, and then synchronously press and contact the semi-finished workpiece 2 during the positioning process of the hollow seat 72 and the semi-finished workpiece 2. Then, the pressure data of the three pressure detectors 76 change direction to reflect the structural state of the overlapped edge clearance groove inside the semi-finished workpiece 2. The lifting assembly 9 includes a second electric push rod and an auxiliary bracket fixedly connected to the surface of the second electric push rod shell. The top of the auxiliary bracket is fixedly connected to the bottom surface of the semi-finished workpiece 2. The output end of the second electric push rod is transmission-connected to the bottom of the hollow base 71, and the composite positioning assembly 7 can be coplanar with the top surface of the template 6 under the transmission of the second electric push rod. Under the transmission of the lifting assembly 9, in addition to enabling the composite positioning assembly 7 to perform preliminary installation and limit on the semi-finished workpiece 2, it can also automatically move and make way during the stamping process of the semi-finished workpiece 2.

[0029] Working principle:

[0030] Example 1

[0031] According to the shortcomings of the existing processing technology, the applicant will adopt a new processing technology, namely punching, bagging, punching, flattening, back-piercing and shaping. Among them, the bagging height: through the material volume calculation, according to the volume equality principle, calculate the material inflow volume, accurately control the bagging height, avoid the bagging being too high, the material stacking or the bagging being too low, and the R angle being not full. The flattening structure must protect the straight edge of the flip hole, and the surface must be smooth and super-coated. The back-pier limiting structure: the back-pier height is accurately controlled according to the material volume. All R corners must be sealed to prevent the material from flowing uncontrolled.

[0032] After the semi-finished workpiece 2 has undergone the first punching and wrapping processing, in order to meet the secondary punching processing requirements of the semi-finished workpiece 2, the semi-finished workpiece 2 can be placed in the clamping space and limited with the positioning hollow seat 72 inside the composite positioning component 7, and then the three inverted L-shaped pressure plates 81 in the open state are closed, and the output ends of the three inverted L-shaped pressure plates 81 drive the corresponding first electric push rods 82 to automatically clamp and limit the semi-finished workpiece 2. After completion, the second electric push rod of the lifting component 9 in the open state is closed, so that the second electric push rod drives the composite positioning component 7 to automatically move down and make way until the top surface of the composite positioning component 7 is coplanar with the top surface of the template 6. Then, the hydraulic rod 4 is started, and the hydraulic rod 4 drives the punching head 5 to automatically move down to make way for the first punching hole in the semi-finished workpiece 2 for secondary punching processing to meet the processing and use requirements.

[0033] Example 2

[0034] According to the disadvantages of the existing processing technology, the applicant will adopt a new processing technology, namely punching, stretch wrapping, punching, flattening, sizing back, and shaping. Among them, the stretch wrapping height: through the calculation of the material volume, according to the principle of equal volume, the material inflow volume is calculated, and the stretch wrapping height is accurately controlled to avoid the situation of too high stretch wrapping, material stacking or too low stretch wrapping, and the R corner is not full. The flattening structure must protect the straight edge of the flanging, and the surface is smooth and treated with a super coating. The sizing back limit structure: accurately control the sizing back height according to the material volume, and all R corners must be sealed to prevent uncontrolled material flow;

[0035] After the semi-finished workpiece 2 undergoes the first punching and stretch wrapping processes, for the secondary punching processing requirement of the semi-finished workpiece 2, the semi-finished workpiece 2 can be placed in the clamping space and sleeved and limited with the positioning hollow seat 72 inside the composite positioning component 7. Then, the three inverted L-shaped pressing plates 81 in the open state are closed, and the output ends of the three inverted L-shaped pressing plates 81 drive their respective corresponding first electric push rods 82 to automatically clamp and limit the semi-finished workpiece 2. After completion, the second electric push rod of the lifting component 9 in the open state is closed, so that the second electric push rod drives the composite positioning component 7 to automatically move down and make way until the top surface of the composite positioning component 7 is coplanar with the top surface of the template 6. Then, the hydraulic rod 4 is started, and the hydraulic rod 4 drives the punching head 5 to automatically move down to perform secondary punching processing on the first punching position in the semi-finished workpiece 2 to meet the processing and use requirements;

[0036] During the sleeving process of the semi-finished workpiece 2 and the composite positioning component 7, a self-inspection effect can be extended. Specifically, first, a standard semi-finished workpiece 2 is sleeved with the positioning hollow seat 72. During the sleeving process, one end of the three U-shaped rods 74 will be passively moved and make way under the top pressure of the semi-finished workpiece 2, and then the three pressure detectors 76 are pressed and changed. The three pressure detectors 76 output three detection information about the inner wall position of the overlapping edge making groove of the standard semi-finished workpiece 2. Taking this as a standard, during the sleeving process of the subsequent semi-finished workpiece 2 to be processed and the composite positioning component 7, similarly, one end of the three U-shaped rods 74 will be passively moved and make way under the top pressure of the semi-finished workpiece 2, and then the three pressure detectors 76 are pressed and changed. The three pressure detectors 76 output three detection information about the inner wall position of the overlapping edge making groove of the semi-finished workpiece 2. Comparing the above standard data, if the difference is large, it indicates that the overlapping edge making groove of the semi-finished workpiece 2 is poorly processed. If the difference is small, it indicates that the overlapping edge making groove of the semi-finished workpiece 2 is well processed.

[0037] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. At the same time, in the drawings of the present utility model, the filling patterns are only for differentiating the layers and are not subject to any other limitations.

[0038] Although the embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An automotive seat belt metal edge folding device, comprising a stamping base (1), a semi-finished workpiece (2), and a support frame (3) installed on the top of the stamping base (1). A folding edge relief groove is provided inside the semi-finished workpiece (2). A hydraulic rod (4) is sleeved inside the top of the support frame (3). It is characterized in that: Inside the inner side of the top of the stamping base (1), a template (6) is sleeved. Inside the template (6), a composite positioning component (7) and an automatic clamping component (8) are respectively sleeved. And a clamping space is formed between the output structure at the top of the automatic clamping component (8) and the top surface of the template (6). The semi-finished workpiece (2) is placed in the clamping space and is clamped with the top structure of the composite positioning component (7). At the bottom of the template (6), a lifting component (9) which is in transmission connection with the bottom of the composite positioning component (7) is arranged. The output end of the hydraulic rod (4) is in transmission connection with a punching head (5) aligned with the semi-finished workpiece (2).

2. The metal edge - folding device for an automobile seat belt according to claim 1, characterized in that: Inside the inner side of the top structure of the stamping base (1), a stepped groove with an open middle is opened. The template (6) is nested in the stepped groove, and the side of the template (6) and the inner wall of the corresponding side of the adjustment groove are installed through screws. The top surface of the template (6) is coplanar with the top surface of the stamping base (1), and an anti-interference groove is arranged in the middle of the template (6).

3. The metal hemming device for a car safety belt according to claim 1, characterized in that: Three through grooves are opened inside the template (6). The number of the automatic clamping components (8) is three. And the three automatic clamping components (8) are respectively composed of an inverted L-shaped pressing plate (81) and a first electric push rod (82). One ends of the three first electric push rods (82) serve as the output structures of the automatic clamping components (8) and respectively penetrate through the three through grooves. The other ends of the three first electric push rods (82) are respectively in transmission connection with the output ends of the three inverted L-shaped pressing plates (81). Support seats are installed between the surface of the housing of the three inverted L-shaped pressing plates (81) and the bottom surface of the template (6).

4. A metal overlapping edge device for an automotive seat belt according to claim 1, wherein: The composite positioning component (7) includes a hollow base (71) and a positioning hollow seat (72). The top of the hollow base (71) is fixedly connected with the bottom of the positioning hollow seat (72) and is in space communication. And the positioning hollow seat (72) can clamp and position the semi-finished workpiece (2).

5. The metal overlapping edge device for an automotive seat belt according to claim 4, wherein: The internal space of the hollow base (71) and the internal space of the positioning hollow seat (72) form an installation space in combination. An auxiliary support plate (73) is sleeved in the installation space. Three positioning holes are opened at the top of the positioning hollow seat (72). Three U-shaped rods (74) are clamped inside the auxiliary support plate (73). And buffer springs (75) are installed between the surface of the auxiliary support plate (73) and the middle surfaces of the three U-shaped rods (74). One ends of the three U-shaped rods (74) respectively penetrate through the three positioning holes and can be in fit connection with the inner wall of the overlapping edge relief groove in the semi-finished workpiece (2).

6. The metal hemming device for a car safety belt according to claim 4, characterized in that: Three pressure detectors (76) are installed on the inner wall of the hollow base (71). The three pressure detectors (76) are respectively aligned with the other ends of the three U-shaped rods (74) and can be in fit connection.

7. The metal hemming device for a car safety belt according to claim 4, characterized in that: The lifting assembly (9) includes a second electric push rod and an auxiliary bracket fixedly connected to the surface of the second electric push rod housing, the top of the auxiliary bracket is fixedly connected to the bottom surface of the semi-finished workpiece (2), the output end of the second electric push rod is transmission-connected to the bottom of the hollow base (71), and the composite positioning assembly (7) can be coplanar with the top surface of the template (6) under the transmission of the second electric push rod.

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