Method for riveting a watchband tang and watchband tang

Abstract

This application relates to a riveting method for watch strap contacts and the watch strap contacts themselves. By receiving the watch strap contact design drawings, the riveting points and method standards are determined. In practice, a stainless steel strip stamping die can be designed separately in the initial design phase, followed by separate riveting dies for the contact blades and the stainless steel strip. Samples are prepared using a manual verification method. After the sample testing shows that the performance meets the standards, the stainless steel strip die and the final riveting die are integrated into a single progressive die, facilitating stable mass production. According to the method standards, the feed angle and speed of the riveting punch are selected to generate riveting parameters during the sample testing process. Obtaining these riveting parameters ensures that the watch strap contacts meet the required specifications while enabling rapid mass production. Watch strap contacts produced using this application avoid surface wear and even plating peeling, and also prevent breakage of the retaining feet or internal delamination caused by direct stamping, thus improving the service life of the watch strap contacts.

Description

Technical Field

[0001] This application relates to the field of mechanical manufacturing technology, and in particular to a riveting method for watch strap contacts and the watch strap contacts themselves. Background Technology

[0002] As a crucial component of connectors, the watchband contacts play a key role in their performance. Mounted at the connection points of conductive machinery, the watchband contacts form multi-point contacts. Due to the large number of contact points, they possess a significant current-carrying capacity. Therefore, watchband contacts are widely used in mechatronics equipment.

[0003] There are many watch strap contact products on the market, but these products often suffer from a short lifespan in actual use. This is because the riveting method and structural design of these watch strap contacts allow for a limited number of insertion and removal cycles, and the riveting points of traditional watch strap contacts are prone to loosening. To solve the problem of the short lifespan of traditional watch strap contacts, this application proposes a riveting method for watch strap contacts and a watch strap contact itself. Summary of the Invention

[0004] Therefore, in order to address the shortcomings of traditional watch strap contacts having a short service life, this application proposes a riveting method for watch strap contacts and watch strap contacts themselves.

[0005] This application provides a method for riveting watch strap fingers, including:

[0006] Receive the watch strap contact design drawing to determine the riveting points and method standards for the watch strap contact; the watch strap contact includes contact blades and connecting strips;

[0007] Receive the finger blades and connecting strip; select the feeding direction of the connecting strip according to the rivet points of the watch strap fingers; and grab the finger blades so that the finger blades adhere to the connecting strip.

[0008] The pressure device of the movable riveting mold makes the finger blades fit tightly against the connecting strip under the pressure of the pressure structure; at this time, the gripper of the finger blades and the body of the finger blades are in a 180-degree positional relationship.

[0009] According to the method standard, select the preset feed angle and preset feed speed of the riveting punch to generate riveting parameters;

[0010] The riveting punch is moved based on the riveting parameters, causing the gripper of the contact finger blade to rotate 180 degrees around its initial position to wrap the connecting strip.

[0011] The bent section of the fixed clamp is subjected to N roll forming processes using a riveting punch; N is a positive integer.

[0012] The rivet point recess is invoked to perform stamping on the overlapping area of ​​the bent part of the foot and the connecting strip to form a stamped recess area.

[0013] This application also provides a watch strap finger, including:

[0014] The finger blade includes a body and a retainer, wherein the retainer is fixedly connected to the body;

[0015] The connecting strip includes multiple connecting areas and supports. Each connecting area is parallel to the others. The angle between the connecting area and the support is greater than or equal to 5 degrees and less than or equal to 15 degrees. Adjacent connecting areas are fixedly connected by supports. The foot clamp is placed in the connecting area, and a stamping part is provided between the foot clamp and the connecting area. The connecting area is the overlapping area of ​​the connecting strip and the foot clamp, and the stamping part is the recessed area of ​​the foot clamp area.

[0016] This application relates to a riveting method for watch strap contacts and the watch strap contacts themselves. By receiving the watch strap contact design drawing, the riveting points and method standards for the contacts are determined. In practice, a stainless steel strip stamping die can be designed separately in the early design stages, followed by separate riveting dies for the contact blades and the stainless steel strip. Samples are prepared using a manual verification method. After the sample testing shows that the performance meets the standards, the stainless steel strip die and the final riveting die are integrated into a single progressive die, facilitating stable mass production later. According to the method standards, the feed angle and speed of the riveting punch are selected to generate riveting parameters during the sample testing process. Obtaining the riveting parameters ensures that the watch strap contacts meet the requirements while enabling rapid mass production. Based on the riveting parameters, the riveting punch is moved to rotate the contact blade's retaining foot 180 degrees, activating the riveting point recess to stamp the overlapping area of ​​the retaining foot bend and the connecting strip, forming a stamped recess area. The watch strap fingers produced using this application avoid surface wear and even plating peeling, and also avoid breakage of the fixing feet or internal fractures caused by direct stamping, which improves the service life of the watch strap fingers. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0018] Figure 1 This is a flowchart illustrating a method for riveting watch strap fingers according to an embodiment of this application.

[0019] Figure 2 This is a structural diagram of a watch strap finger component provided in an embodiment of this application.

[0020] Figure 3 This is a structural diagram of a watch strap finger member provided in another embodiment of this application.

[0021] Figure label:

[0022] 100 - Finger blade; 110 - Body; 120 - Clamping foot; 200 - Connecting belt; 210 - Connecting area;

[0023] 220 - Support; 230 - Stamping part. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0025] This application provides a riveting method for watch strap fingers.

[0026] like Figure 1 As shown, in one embodiment of this application, a method for riveting watch strap fingers includes:

[0027] S100, Receive the watch strap contact design drawing to determine the riveting points and method standards for the watch strap contacts. The watch strap contacts include contact blades and connecting strips.

[0028] S200 receives the finger blades and the connecting belt, selects the feeding direction of the connecting belt according to the riveting point of the watch strap finger, and grabs the finger blades so that the finger blades are attached to the connecting belt.

[0029] S300, a pressure device for moving riveting molds, makes the finger blades fit tightly against the connecting strip under the pressure of the pressure structure.

[0030] S400, according to the method standard, select the preset feed angle and preset feed speed of the riveting punch to generate riveting parameters.

[0031] S500 moves the riveting punch based on riveting parameters, causing the gripper of the contact finger blade to rotate 180 degrees around its initial position to wrap the connecting strip.

[0032] S600, the bent part of the fixed foot is subjected to N roll pressing processes using a riveting punch; N is a positive integer.

[0033] S700 calls the rivet point recess to perform stamping on the overlapping area of ​​the bent part of the foot and the connecting strip to form a stamping recess area.

[0034] Specifically, in the initial testing phase, the riveting assembly of the copper contact blades and stainless steel connecting strips was carried out manually. The feeding direction was vertical from the side. The contact blades faced downwards, and the stamping and riveting punch performed the riveting in steps from top to bottom. This design facilitates the positioning of the copper contact blades. Simply fixing the contact blades on the sliding feed bracket and pushing them to the fixed limit position allows for accurate and stable feeding of the copper blades to be riveted into the forming chamber. Furthermore, the entire riveting process needs to be performed in steps. The stamping press's characteristic of stamping from top to bottom, with the back of the strap contact fingers facing upwards, helps control the stability and reliability of the step-by-step stamping process.

[0035] This embodiment relates to a riveting method for watch strap fingers. By receiving the watch strap finger design drawing, the riveting points and method standards are determined. In practice, a stainless steel strip stamping die can be designed separately in the initial design phase, followed by separate riveting dies for the finger blades and stainless steel strip. Samples are prepared using manual verification. After the sample testing shows satisfactory performance, the stainless steel strip die and the final riveting die are integrated into a single progressive die, facilitating stable mass production later. The feed angle and speed of the riveting punch are selected according to the method standards to generate riveting parameters, which is achieved during the sample testing process. Obtaining the riveting parameters ensures that the watch strap fingers meet the required specifications while enabling rapid mass production. Based on the riveting parameters, the riveting punch is moved to rotate the finger blade retainer by 180 degrees, activating the riveting point recess to stamp the overlapping area of ​​the retainer bend and the connecting strip, forming a stamped recess area. The watch strap fingers produced using this application avoid surface wear and even plating peeling, and also avoid breakage of the fixing feet or internal fractures caused by direct stamping, which improves the service life of the watch strap fingers.

[0036] In one embodiment of this application, S100 includes:

[0037] S110, compare the punched sheet of the finger blade with the design drawing of the watch strap finger blade to determine the clamping length of the finger blade.

[0038] S120, based on the design drawing of the watch strap finger, determine the number and area of ​​the recessed areas of the foot strap.

[0039] S130, compare the design drawings of the connecting strap and the watch strap finger to determine the overlap area between the connecting strap and the foot.

[0040] S140, based on the material selection in the watch strap finger design drawing, determine the riveting force parameters.

[0041] S150 incorporates the length of the clamping foot, the number and area of ​​the clamping foot's recessed area, and the force parameters for riveting into the method standard.

[0042] S160, using the overlapping area of ​​the connecting strap and the foot, determines the riveting point of the watch strap finger.

[0043] This embodiment relates to a method for determining riveting parameters. The clamping length of the punched blade of the contact finger is an important parameter during riveting, as it affects the contact finger's discharge speed and the contact area between the contact finger and the connecting strip. Determining the clamping length helps in determining the number and area of ​​the recessed areas in the clamping region, thereby improving the connection strength between the contact finger and the connecting strip.

[0044] It is worth mentioning that the force parameters applied to the riveting of the contact blades and connecting strips made of different metal materials are different when they are combined to form an assembly. Appropriate force parameters can maximize the riveting of the contact blades and connecting strips together.

[0045] In one embodiment of this application, prior to S200, the method includes:

[0046] S211, Calculate the feeding position and speed of the finger blades in the riveting machine based on the length of the clamp and the riveting point of the watch strap finger.

[0047] S212, Determine the moving speed of the connecting belt in the riveting machine based on the feeding position and speed of the finger blades in the riveting machine.

[0048] S213, based on the feeding position and speed of the finger blades in the riveting machine and the moving speed of the connecting belt in the riveting machine, a feeding test is conducted to obtain the matching degree between the finger blades and the connecting belt.

[0049] This embodiment relates to a method for bonding the contact blades and the connecting strip. By calculating the feeding position and speed of the contact blades in the riveting machine, and in conjunction with the moving speed of the connecting strip in the riveting machine, the bonding of the contact blades and the connecting strip is achieved, meeting the needs of automated production. From a design perspective, the tight bonding of the contact blades and the connecting strip improves the continuity and consistency of subsequent steps, which increases the yield rate and reduces the risk of short service life of the watch strap contacts.

[0050] In one embodiment of this application, prior to S200, the method further includes:

[0051] S221, the success of the feeding test is determined based on the matching degree between the contact blade and the connecting belt.

[0052] S222, if the feeding test is successful, then the receiving of the finger blade and connecting strip is performed. According to the rivet point of the watch strap finger, the feeding direction of the connecting strip is selected, and the finger blade is grasped so that the finger blade is attached to the connecting strip.

[0053] S223, if the feeding test is unsuccessful, return to the step of calculating the feeding position and speed of the finger blade in the riveting machine based on the length of the gripper and the riveting point of the watch strap finger, until the feeding test is successful.

[0054] Specifically, in the initial testing phase, the copper contact blades and stainless steel connecting strips were assembled by manual feeding. This was to adjust the matching degree of the feeding position and speed of the contact blades and connecting strips.

[0055] This embodiment relates to a method for determining the matching degree between the contact blade and the connecting belt. This design method facilitates the positioning of the copper contact blade. Simply fix the contact blade on the sliding feeding bracket, and with the input of the connecting belt, push the contact blade to the fixed limit position. This will accurately and stably feed the copper contact blade to be riveted into the forming chamber, thereby completing the subsequent procedures.

[0056] In one embodiment of this application, S300 includes:

[0057] S311, a pressure device is selected based on the angle between the overlapping area of ​​the connecting belt and the clamping foot, and the angle between the extension plane of the connecting belt itself. The pressure device includes a first fitting and a second fitting.

[0058] This embodiment relates to a method for selecting a pressure device. Different pressure devices can create different inclination angles in the overlapping area of ​​the connecting strip punch and the clamp, and these different inclination angles result in different service lives for the finished watch strap fingers. To ensure that the service life of the finished watch strap fingers meets the expected specifications, the selection of the pressure device will affect the number of times the clamp bending point is rolled.

[0059] In one embodiment of this application, S300 further includes:

[0060] S321, the first composite piece is pressed against the finger blade.

[0061] S322, the second piece is abutted against the connecting strip; the width of the stamping area where the connecting strip overlaps with the foot is greater than the width of the foot.

[0062] S323, move the first or second ply to make the first and second ply move relative to each other until the finger blades are tightly attached to the connecting strip.

[0063] This embodiment relates to a method for moving the pressure device. After the feeding bracket pushes the finger blade into place, the first or second clamping plate begins to press and position it, tightly fitting the finger blade and the stainless steel connecting strip to prevent the finger blade from shifting when the riveting punch presses down.

[0064] In one embodiment of this application, S400 includes:

[0065] S410 uses a roller as the riveting punch to match the selected riveting punch feed angle and speed.

[0066] This embodiment relates to a method for selecting a riveting punch. The finger blades are pressed and bent; at this time, the gripping feet of the finger blades are deformed by the pressure and pushing of the rollers, resulting in a 180-degree bend.

[0067] This bending process cannot be completed by direct punching. Direct punching involves excessive force, and the bending angle exceeds 90 degrees. Since the finger blades have already been polished and electroplated, direct punching would cause surface wear or even plating peel off. Furthermore, although the copper finger blades have low hardness and good ductility, their thickness is only 0.5mm. Direct punching carries the risk of breaking the retaining foot or causing internal fractures. Since the retaining foot is not only a crucial fixing structure between the copper finger blades and the steel band but also a vital electrical contact point for the watch band fingers, direct punching and bending is not feasible. After numerous trials and research, a roller-pressing method was adopted to bend the retaining foot. This avoids the aforementioned problems, while minimizing vibration and stroke amplitude, which facilitates precise fixation of the finger blades.

[0068] In one embodiment of this application, S500 includes:

[0069] S510, the moving riveting punch is used to create a chamfer at the connection between the body of the finger blade and the foot, with a radius between 0.1 mm and 0.3 mm.

[0070] This embodiment relates to a bending method for the finger blade retainer. When bending the retainer, a rounded bevel angle needs to be provided. This rounded bevel angle is designed to ensure stable contact with the metal contact surface at all times when the watch strap finger blade rotates after being pressed down. The size design of this bevel angle needs to be coordinated with the rounded bevel angle of the stainless steel strip's fixed tooth structure in a linked design.

[0071] This application also provides a watch strap finger.

[0072] like Figures 2 to 3 As shown, in one embodiment of this application, a watch strap finger includes a finger blade 100 and a connecting strap 200.

[0073] The finger blade 100 includes a body 110 and a retainer 120, wherein the retainer 120 is fixedly connected to the body 110;

[0074] The connecting band 200 includes multiple connecting areas 210 and a bracket 220. Each connecting area 210 is parallel to the others. The angle between the connecting area 210 and the bracket 220 is greater than or equal to 5 degrees and less than or equal to 15 degrees. Adjacent connecting areas 210 are fixedly connected by the bracket 220. The retaining foot 120 is placed in the connecting area 210, and a stamping part 230 is provided between the connecting areas 200. The connecting area 210 is the overlapping area of ​​the connecting band 200 and the retaining foot 120, and the stamping part 230 is the recessed area of ​​the retaining foot 120.

[0075] This embodiment relates to a watchband contact finger. Due to the way the watchband contact finger is installed, the connector is subjected to downward pressure during insertion and removal, as well as lateral vertical squeezing force when the plug is inserted. Therefore, to strengthen the riveting, the structure of the watchband contact finger relying solely on the clamp 120 to be held in the connection area 210 is not stable enough, and it may even shift laterally. Therefore, a stamping part 230 is required for the contact finger blade. A circular indentation is stamped out at the center of the clamp 120 after bending. This indentation will cause a convex deformation on the fixed contact surface between the clamp 120 and the connection area 210, thereby making the contact finger blade 100 more stably riveted and fixed to the connecting band 200.

[0076] like Figures 2 to 3 As shown, in one embodiment of this application, the shape of the body 110 is one or more of a triangle, a rectangle, and a trapezoid.

[0077] This embodiment relates to the shape of the body 110. Different body shapes 110 can adapt to different installation conditions, improving the compatibility of the watch strap fingers.

[0078] The technical features of the above embodiments can be combined arbitrarily, and the execution order of the method steps is not restricted. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0079] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A riveting method of a watchband finger, characterized by, include: Receive the watch strap contact design drawing to determine the riveting points and method standards for the watch strap contact; the watch strap contact includes contact blades and connecting strips; Receive the finger blades and connecting strip; select the feeding direction of the connecting strip according to the rivet points of the watch strap fingers; and grab the finger blades so that the finger blades adhere to the connecting strip. The pressure device of the movable riveting mold makes the finger blades fit tightly against the connecting strip under the pressure of the pressure structure; at this time, the gripper of the finger blades and the body of the finger blades are in a 180-degree positional relationship. According to the method standard, select the preset feed angle and preset feed speed of the riveting punch to generate riveting parameters; The riveting punch is moved based on the riveting parameters, causing the gripper of the contact finger blade to rotate 180 degrees around its initial position to wrap the connecting strip. The bent section of the fixed clamp is subjected to N roll forming processes using a riveting punch; N is a positive integer. Call the rivet point recess to perform stamping on the overlapping area of ​​the bent part of the foot and the connecting strip to form a stamping recess area; The receiving strap contact design drawing is used to determine the riveting points and method standards for the strap contacts; the strap contacts include contact blades and connecting strips, including: By comparing the punched sheet of the finger blade with the design drawing of the watch strap finger blade, the clamping length of the finger blade is determined. Based on the design drawing of the watch strap finger, determine the number and area of ​​the recessed areas of the foot strap; Compare the design drawings of the connecting strap and the watch strap fingers to determine the overlap area between the connecting strap and the feet; Based on the material selection in the watch strap finger design drawing, determine the riveting force parameters; The method standard includes the length of the clamping foot, the number and area of ​​the clamping foot's recessed area, and the force parameters for riveting. The rivet points of the watch strap fingers are determined by utilizing the overlapping area of ​​the connecting strap and the retaining foot.

2. The riveting method of a watchband tang according to claim 1, wherein The method for receiving the contact blade and connecting strip, selecting the feeding direction of the connecting strip according to the riveting point of the watch strap contact, and grasping the contact blade so that the contact blade is attached to the connecting strip, includes: Calculate the feeding position and speed of the finger blades in the riveting machine based on the length of the clamp and the riveting points of the watch strap fingers. The moving speed of the connecting belt in the riveting machine is determined based on the feeding position and speed of the finger blades in the riveting machine. Feeding tests are conducted based on the feeding position and speed of the finger blades in the riveting machine and the moving speed of the connecting belt in the riveting machine to obtain the matching degree between the finger blades and the connecting belt.

3. The riveting method of a watchband tang according to claim 2, wherein The method of receiving the contact blade and connecting strip, selecting the feeding direction of the connecting strip according to the riveting point of the watch strap contact, and grasping the contact blade so that the contact blade is attached to the connecting strip, further includes: The success of the feeding test is determined by the matching degree between the contact blades and the connecting belt. If the feeding test is successful, then the receiving of the contact blade and connecting strip will be performed. Based on the rivet point of the watch strap contact, the feeding direction of the connecting strip will be selected, and the contact blade will be grasped so that the contact blade is attached to the connecting strip. If the feeding test is unsuccessful, return to the step where the feed position and speed of the finger blades on the riveting machine are calculated based on the length of the gripper and the riveting point of the watch strap finger, until the feeding test is successful.

4. The riveting method of a watchband tang according to claim 3, wherein The pressure device of the movable riveting mold causes the finger blades to fit tightly against the connecting strip under the pressure of the pressure structure, including: The pressure device is selected based on the angle between the overlapping area of ​​the connecting strip and the foot and the extension plane of the connecting strip itself; the pressure device includes a first fitting and a second fitting.

5. The riveting method of a watchband tang according to claim 4, wherein The pressure device of the movable riveting mold, which makes the finger blades fit tightly against the connecting strip under the pressure of the pressure structure, also includes: The first piece is placed against the finger blade; The second piece is abutted against the connecting strip; the width of the stamping area where the connecting strip overlaps with the foot is greater than the width of the foot. Move the first or second ply to make the first and second ply move relative to each other until the finger blades are tightly attached to the connecting strip.

6. The riveting method of a watchband tang according to claim 5, wherein According to the method standard, the feed angle and speed of the riveting punch are selected to generate riveting parameters, including: A roller is selected as the riveting punch to match the feed angle and speed of the selected riveting punch.

7. The riveting method of a watchband tang according to claim 6, wherein The method of moving the riveting punch based on riveting parameters to rotate the contact finger blade clamp by 180 degrees includes: Move the riveting punch to create a chamfer at the connection between the body of the finger blade and the clamping foot, with a radius between 0.1 mm and 0.3 mm.

8. A watchband finger, characterized by include: The finger blade includes a body and a retaining foot, wherein the retaining foot is fixedly connected to the body; The connecting strip includes multiple connecting areas and supports. Each connecting area is parallel to the others. The angle between the connecting area and the support is greater than or equal to 5 degrees and less than or equal to 15 degrees. Adjacent connecting areas are fixedly connected by supports. The foot clamp is placed in the connecting area, and a stamping part is provided between the foot clamp and the connecting area. The connecting area is the overlapping area of ​​the connecting strip and the foot clamp, and the stamping part is the recessed area of ​​the foot clamp area.

9. The watchband finger of claim 8, wherein, The shape of the body is one of triangle, rectangle, and trapezoid.

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