A point contact terminal forming process

Abstract

The application discloses a point contact terminal forming process, first, rough cutting is performed on a metal part by using a rough cutting punch to form a blank; second, a first chamfering punch is used to perform chamfering treatment on the blank; third, an upper die is pressed downward, so that the blank is lifted along the slope direction under the action of the slope protrusion one, the end of the blank extends out of the slope protrusion one after the chamfering treatment, and the lower part of the end protrudes from the chamfering, then a first fine cutting punch is used to cut the protruding part of the end of the blank, after the cutting, a sharp convex point is formed between the lower part of the end of the blank and the chamfering; fourth, a second chamfering punch is used to press the lifted blank downward to restore, so that a terminal is formed, real point contact is realized, the contact area between the end of the terminal and an electronic component can be effectively reduced, that is, the resistance between the terminal and the electronic component is effectively reduced, transmission efficiency is better, and the connector is more durable.

Description

Technical Field

[0001] The invention belongs to the technical field of metal terminal manufacturing, in particular to a process for forming a point contact terminal. Background Art

[0002] Board-to-board connectors have the strongest transmission capabilities among all connector product types. They are mainly used in power systems, communication networks, financial manufacturing, elevators, industrial automation, medical equipment, office equipment, home appliances, military manufacturing and other industries. However, the terminal contact area of ​​board-to-board connectors is currently large. When working, the flow of current causes the contact points to generate heat, and the temperature rises, affecting the transmission efficiency. Summary of the Invention

[0003] The object of the present invention is to provide a point contact terminal forming process to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A point contact terminal forming process includes a stamping die, wherein the stamping die is provided with a rough cutting punch, a first chamfering punch, a first fine cutting punch, and a second chamfering punch. After the metal part enters the stamping die, the processing steps are as follows:

[0006] In the first step, a rough cutting punch is used to rough cut the metal part to form a blank;

[0007] In the second step, the blank is chamfered using a first chamfering punch so that the upper portion of the end portion is chamfered;

[0008] In the third step, a bevel protrusion is provided at the corresponding fine cutting position of the lower die of the stamping die. The blank enters the fine cutting position and is located on the bevel protrusion. When fine cutting is performed, the upper die is pressed downward so that the blank is tilted along the bevel direction under the action of the bevel protrusion. The end of the blank after chamfering extends out of the bevel protrusion, and the lower part of the end protrudes from the chamfer. Then, the protruding part of the end of the blank is cut using the first fine cutting punch. After cutting, a sharp convex point is formed between the lower part of the end of the blank and the chamfer.

[0009] In the fourth step, a second chamfering punch is used to press the raised blank down to restore it to its original shape to form a terminal.

[0010] A further technical solution is that the fifth step also includes a back-slap punch, which is provided with a second inclined protrusion. Through the cooperation of the back-slap punch and the second inclined protrusion, the terminal is pressed down for a second time to ensure that the terminal no longer curls up.

[0011] A further technical solution also includes a forging punch. After the rough cutting in the first step is completed, a bright band 1 and a tear band 1 will be formed on the side of the blank, and then the forging punch is used to squeeze and cut the bright band 1 and the tear band 1 to form a bright band 2 and a tear band 2 on the side of the blank.

[0012] A further technical solution also includes a second fine-cutting punch. After the second bright band and the second tearing band are formed on the side of the blank, the second fine-cutting punch is used to fine-cut the blank.

[0013] Beneficial effects of the present invention:

[0014] The present invention provides a point contact terminal forming process. Compared with existing terminals, the convex points formed by the above steps can greatly reduce the contact area of ​​the terminal end, realize true point contact, and effectively reduce the contact area between the terminal end and the electronic component, that is, effectively reduce the resistance between the terminal and the electronic component, so as to improve the transmission efficiency and make the connector more durable.

[0015] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 : Second step action schematic diagram of the present invention.

[0017] Figure 2 : The third step action schematic diagram of the present invention.

[0018] Figure 3 : Schematic diagram of the fourth step of the present invention.

[0019] Figure 4 : Schematic diagram of the fifth step of the present invention.

[0020] Figure 5 : Schematic diagram of extrusion cutting of the present invention.

[0021] Figure 6 : The second precise cutting schematic diagram of the present invention. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0023] Example 1, please refer to Figure 1-3 ;

[0024] A point contact terminal forming process includes a stamping die, wherein a rough cutting punch, a first chamfering punch 1, a first fine cutting punch 2, and a second chamfering punch 3 are provided in the stamping die. After the metal part enters the stamping die, the processing steps are as follows:

[0025] In the first step, a rough cutting punch is used to rough cut the metal part to form a blank 4;

[0026] In the second step, the blank 4 is chamfered using the first chamfering punch 1 so that the upper portion of the end portion thereof is chamfered 45;

[0027] In the third step, a chamfered protrusion 5 is provided at the corresponding fine-cutting position of the lower die of the stamping die. The blank 4 enters the fine-cutting position and is located above the chamfered protrusion 5. During fine-cutting, the upper die presses downward so that the blank 4 is tilted along the chamfered direction under the action of the chamfered protrusion 5. The chamfered end of the blank 4 extends out of the chamfered protrusion 5, and the lower part of the end protrudes from the chamfer 45. Then, the first fine-cutting punch 2 is used to cut the protruding part of the end of the blank 4. After cutting, a sharp protrusion 46 is formed between the lower part of the end of the blank 4 and the chamfer.

[0028] In the fourth step, the second chamfering punch 3 is used to press the raised blank 4 back to its original shape to form a terminal.

[0029] Compared with existing terminals, the bumps 46 formed through the above steps can greatly reduce the contact area of ​​the terminal end, realize true point contact, and effectively reduce the contact area between the terminal end and the electronic components, that is, effectively reduce the resistance between the terminal and the electronic components, making the transmission efficiency better and the connector more durable.

[0030] Example 2, please refer to Figure 1-4 ;

[0031] A point contact terminal forming process includes a stamping die, wherein a rough cutting punch, a first chamfering punch 1, a first fine cutting punch 2, and a second chamfering punch 3 are provided in the stamping die. After the metal part enters the stamping die, the processing steps are as follows:

[0032] In the first step, a rough cutting punch is used to rough cut the metal part to form a blank 4;

[0033] In the second step, the blank 4 is chamfered using the first chamfering punch 1 so that the upper portion of the end portion thereof is chamfered 45;

[0034] In the third step, a chamfered protrusion 5 is provided at the corresponding fine-cutting position of the lower die of the stamping die. The blank 4 enters the fine-cutting position and is located above the chamfered protrusion 5. During fine-cutting, the upper die presses downward so that the blank 4 is tilted along the chamfered direction under the action of the chamfered protrusion 5. The chamfered end of the blank 4 extends out of the chamfered protrusion 5, and the lower part of the end protrudes from the chamfer 45. Then, the first fine-cutting punch 2 is used to cut the protruding part of the end of the blank 4. After cutting, a sharp protrusion 46 is formed between the lower part of the end of the blank 4 and the chamfer.

[0035] Step 4: Use the second chamfering punch 3 to press down the raised blank 4 to restore it to its original shape, thereby forming a terminal.

[0036] The fifth step is to use the back-slap punch 6 to press the formed terminal down for the second time, wherein the back-slap punch 6 is provided with a second inclined protrusion 61. Through the cooperation of the back-slap punch 6 and the second inclined protrusion 61, the terminal is pressed down for the second time to ensure that the terminal no longer curls up. In order to cooperate with the use of the second inclined protrusion 61, a groove is provided at the back-slap position corresponding to the lower mold. Since the terminal is elastic, during the back-slap step, the second inclined protrusion 61 presses the terminal into the groove, and then the terminal rebounds but does not curl up.

[0037] Example 3, please refer to Figure 1-5 ;

[0038] A point contact terminal forming process includes a stamping die, wherein a rough cutting punch, a first chamfering punch 1, a first fine cutting punch 2, and a second chamfering punch 3 are provided in the stamping die. After the metal part enters the stamping die, the processing steps are as follows:

[0039] In the first step, a rough cutting punch is used to rough cut the metal part to form a blank 4;

[0040] In the second step, the blank 4 is chamfered using the first chamfering punch 1 so that the upper portion of the end portion thereof is chamfered 45;

[0041] In the third step, a chamfered protrusion 5 is provided at the corresponding fine-cutting position of the lower die of the stamping die. The blank 4 enters the fine-cutting position and is located above the chamfered protrusion 5. During fine-cutting, the upper die presses downward so that the blank 4 is tilted along the chamfered direction under the action of the chamfered protrusion 5. The chamfered end of the blank 4 extends out of the chamfered protrusion 5, and the lower part of the end protrudes from the chamfer 45. Then, the first fine-cutting punch 2 is used to cut the protruding part of the end of the blank 4. After cutting, a sharp protrusion 46 is formed between the lower part of the end of the blank 4 and the chamfer.

[0042] Step 4: Use the second chamfering punch 3 to press down the raised blank 4 to restore it to its original shape, thereby forming a terminal.

[0043] In the fifth step, since the other end of the terminal needs to be installed on the connection, and the bright band on the side of the terminal after rough cutting is small, it is easy to cause poor contact. Therefore, the forging punch 7 is used to process the side of the blank 4 to provide the brightness of the side. When rough cutting is performed in the first step, the shear force between the metal parts and the rough cutting punch is large, so a bright band 41 and a tear band 42 will be formed on the side of the blank 4. Then, the forging punch 7 is used to squeeze and cut the bright band 1 and the tear band 1 42. At this time, the shear force between the forging punch 7 and the blank 4 is greatly reduced compared to that during rough cutting. Therefore, after squeezing and cutting the side of the blank 4, a bright band 2 43 and a tear band 2 44 are formed, and the area of ​​the bright band 2 43 is larger than that of the bright band 1 41. This step is independent of the formation of point contact terminals, so this step can be located after the fourth step or after the first step.

[0044] Example 4, please refer to Figure 1-6 ;

[0045] A point contact terminal forming process includes a stamping die, wherein a rough cutting punch, a first chamfering punch 1, a first fine cutting punch 2, and a second chamfering punch 3 are provided in the stamping die. After the metal part enters the stamping die, the processing steps are as follows:

[0046] In the first step, a rough cutting punch is used to rough cut the metal part to form a blank 4;

[0047] In the second step, the blank 4 is chamfered using the first chamfering punch 1 so that the upper portion of the end portion thereof is chamfered 45;

[0048] In the third step, a chamfered protrusion 5 is provided at the corresponding fine-cutting position of the lower die of the stamping die. The blank 4 enters the fine-cutting position and is located above the chamfered protrusion 5. During fine-cutting, the upper die presses downward so that the blank 4 is tilted along the chamfered direction under the action of the chamfered protrusion 5. The chamfered end of the blank 4 extends out of the chamfered protrusion 5, and the lower part of the end protrudes from the chamfer 45. Then, the first fine-cutting punch 2 is used to cut the protruding part of the end of the blank 4. After cutting, a sharp protrusion 46 is formed between the lower part of the end of the blank 4 and the chamfer.

[0049] Step 4: Use the second chamfering punch 3 to press down the raised blank 4 to restore it to its original shape, thereby forming a terminal.

[0050] The fifth step, since the other end of the terminal needs to be installed on the connection, and the bright band on the side of the terminal after rough cutting is small, which is easy to cause poor contact, so the side of the blank 4 is processed using the forging punch 7 to provide the brightness of the side, when the rough cutting is performed in the first step, the shear force between the metal part and the rough cutting punch is large, so the bright band one 41 and the tear band one 42 are formed on the side of the blank 4, then the bright band one 41 and the tear band one 42 are extruded using the forging punch 7, at this time the shear force between the forging punch 7 and the blank 4 is greatly reduced compared with the rough cutting, so the side of the blank 4 is extruded to form the bright band two 43 and the tear band two 44, and the area of the bright band two 43 is larger than that of the bright band one 41;

[0051] The sixth step, the side of the blank 4 is processed again using the second fine cutting punch 8, the fine cutting part is relatively less than the extrusion part, so the shear force generated is smaller, so the side of the blank 4 is fine cut processed using the second fine cutting punch 8, and the new bright band formed has an area larger than the second bright band, at least more than 70%.

[0052] It will be obvious to a person skilled in the art that, without departing from the spirit or essential characteristics of the application, the present application can be implemented in other specific forms. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the description given above, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.

[0053] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A point contact terminal forming process, characterized in that: The invention comprises a stamping die, wherein a rough cutting punch, a first chamfering punch (1), a first fine cutting punch (2), and a second chamfering punch (3) are provided in the stamping die. After the metal part enters the stamping die, the processing steps are as follows: In the first step, a rough cutting punch is used to rough cut the metal part to form a blank (4); In the second step, the blank (4) is chamfered using a first chamfering punch (1) so that the upper portion of the end portion thereof is chamfered (45); In the third step, a bevel protrusion (5) is provided at the corresponding fine cutting position of the lower die of the stamping die. When fine cutting is performed, the upper die is pressed downward so that the blank (4) is tilted along the bevel direction under the action of the bevel protrusion (5). The end of the blank (4) after the chamfering treatment extends out of the bevel protrusion (5), and the lower part of the end protrudes from the chamfer (45). Then, the protruding part of the end of the blank (4) is cut using the first fine cutting punch (2). After cutting, a sharp convex point (46) is formed between the lower part of the end of the blank (4) and the chamfer (45); In the fourth step, the second chamfering punch (3) is used to press the raised blank (4) back to its original shape to form a terminal.

2. A point contact terminal forming process according to claim 1, characterized in that: The fifth step also includes a back-beating punch (6), which is provided with a second inclined surface protrusion (61). Through the cooperation of the back-beating punch (6) and the second inclined surface protrusion (61), the terminal is pressed down for a second time to ensure that the terminal no longer tilts up.

3. A point contact terminal forming process according to claim 1 or 2, characterized in that: It also includes a forging punch (7). After the rough cutting in the first step is completed, a bright band (41) and a tear band (42) are formed on the side of the blank (4). Then, the forging punch (7) is used to squeeze and cut the bright band (41) and the tear band (42) to form a bright band (43) and a tear band (44) on the side of the blank (4).

4. A point contact terminal forming process according to claim 3, characterized in that: The invention also includes a second fine-cutting punch (8). After forming a second bright band (43) and a second tearing band (44) on the side of the blank (4), the second fine-cutting punch (8) is used to fine-cut the blank (4).

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