Lead-out terminal forming die of extra-high voltage varistor

Abstract

The utility model discloses a lead-out terminal forming die of an extra-high voltage varistor, which comprises an upper die, a lower die and an opening and closing driving mechanism capable of driving the upper die and the lower die to open and close, a first left guide surface and a first right guide surface are arranged on the lower end surface of the upper die, the first left guide surface gradually inclines upwards from front to back, and the first right guide surface gradually inclines upwards from front to back. The first right guide surface gradually inclines downwards from front to back; the upper end face of the lower die is provided with a second left guide face corresponding to the first left guide face and further provided with a second right guide face corresponding to the first right guide face, the second left guide face gradually inclines upwards from front to back, and the second right guide face gradually inclines downwards from front to back. And during mold closing, a first guide gap which is gradually inclined upwards from front to back is formed between the first left guide surface and the second left guide surface, and a second guide gap which is gradually inclined downwards from front to back is formed between the first right guide surface and the second right guide surface. The leading-out terminal forming die can improve the clamping firmness of the resistor chip.

Description

Technical Field

[0001] The utility model relates to a forming die, in particular to a lead-out terminal forming die for an ultra-high voltage varistor. Background Art

[0002] Currently, varistors (such as Fig.11 The U-shaped pin includes a resistor chip and a U-shaped pin. The two ends of the U-shaped pin are cross-set, and the resistor chip is clamped between the two pins. The two pins are respectively in contact with the two end surfaces of the resistor chip. However, the two cross-set pins are almost parallel when viewed from the side (as shown in FIG. Fig.10 As shown in the figure, the deflection at the intersection of the two pins is poor; and because the resistor chip of the existing ultra-high voltage varistor is particularly thick, the particularly thick resistor chip is clamped between the two cross pins with poor deflection. The particularly thick resistor chip has a rolling tendency due to its own gravity and inertia, thereby reducing the clamping force of the two cross pins on the resistor chip. Utility Model Content

[0003] The problem to be solved by the utility model is to provide a lead-out terminal forming die for an ultra-high voltage varistor. The lead-out terminal forming die can improve the clamping firmness of the resistor chip.

[0004] In order to solve the above technical problems, the technical solutions adopted by the utility model are as follows:

[0005] A lead-out terminal forming mold for an ultra-high voltage varistor comprises an upper mold, a lower mold and an opening and closing driving mechanism capable of driving the upper mold and the lower mold to perform opening and closing actions, characterized in that: a first left guide surface and a first right guide surface are provided on the lower end surface of the upper mold, the first left guide surface gradually tilts upward from front to back, and the first right guide surface gradually tilts downward from front to back; a second left guide surface corresponding to the first left guide surface is provided on the upper end surface of the lower mold, and a second right guide surface corresponding to the first right guide surface is also provided on the upper end surface of the lower mold, the second left guide surface gradually tilts upward from front to back, and the second right guide surface gradually tilts downward from front to back; when the upper mold and the lower mold are in a mold closing state, a first guide gap gradually tilted upward from front to back is formed between the first left guide surface and the second left guide surface, and a second guide gap gradually tilted downward from front to back is formed between the first right guide surface and the second right guide surface.

[0006] During operation, the upper mold and the lower mold are first driven by the opening and closing driving mechanism to open the mold, and then the outer section of the left pin of the U-shaped pin is placed between the first left guide surface and the second left guide surface, and the outer section of the right pin of the U-shaped pin is placed between the first right guide surface and the second right guide surface; then, the upper mold and the lower mold are driven by the opening and closing driving mechanism to close the mold, so that the left pin is in the first guide gap and the outer section of the left pin is gradually guided to a specific direction, and the right pin is in the second guide gap and the outer section of the left pin is gradually guided to a specific direction. With the further closing and extrusion of the upper mold and the lower mold, there is a gradually tightening space that prompts the outer sections of the left and right pins to form appropriate bends. The outer section of the left pin is squeezed to gradually bend upward from front to back and tilt, and the outer section of the right pin is squeezed to gradually bend downward from front to back. The upward bending angle of the outer section of the left pin is 5°-20°, and the downward bending angle of the outer section of the right pin is 5°-20°.

[0007] In the preferred embodiment, the first left guide surface includes a first lower left plane, a first left inclined plane and a first upper left plane connected in sequence from front to back, and the first upper left plane is higher than the first lower left plane; the second left guide surface includes a second lower left plane, a second left inclined plane and a second upper left plane connected in sequence from front to back, and the second upper left plane is higher than the second lower left plane; the second lower left plane corresponds to the first lower left plane, the second left inclined plane corresponds to the first left inclined plane, and the second upper left plane corresponds to the first upper left plane; the first right guide surface includes a first upper right plane, a first right inclined plane and a first lower right plane connected in sequence from front to back, and the first upper right plane is higher than the first lower right plane; the second right guide surface includes a second upper right plane, a second right inclined plane and a second lower right plane connected in sequence from front to back, and the second upper right plane is higher than the second lower right plane; the second upper right plane corresponds to the first upper right plane, the second right inclined plane corresponds to the first right inclined plane, and the second lower right plane corresponds to the first lower right plane; the first lower left plane is flush with the first upper right plane, and the second lower left plane is flush with the second upper right plane. When the upper mold and the lower mold are in the mold closing state, the outer section of the left pin is gradually guided to bend upward along the gap between the second lower left plane and the first lower left plane, the gap between the second left inclined surface and the first left inclined surface, and the gap between the second upper left plane and the first upper left plane; the outer section of the right pin is gradually guided to bend downward along the gap between the second upper right plane and the first upper right plane, the gap between the second right inclined surface and the first right inclined surface, and the gap between the second lower right plane and the first lower right plane.

[0008] In a further preferred embodiment, the first lower left plane and the first left inclined surface have a first left step, and the first upper right plane and the first right inclined surface have a first right step; the second lower left plane and the second left inclined surface have a second left step, and the second upper right plane and the second right inclined surface have a second right step, and the second left step corresponds to the first left step, and the second right step corresponds to the first right step. When the upper mold and the lower mold are in a mold-closing state, the second left step corresponds to the first left step, and the second right step corresponds to the first right step, which helps to accurately control the specific position of the left and right pins during the bending process. Due to the precise alignment of the inclined surface and the step, the bending angle and position of the U-shaped pin formed each time can be kept consistent.

[0009] In a preferred embodiment, a first strip-shaped gap extending forward and backward is provided between the first left guide surface and the first right guide surface; a second strip-shaped gap extending forward and backward is provided between the second left guide surface and the second right guide surface, and the second strip-shaped gap is located directly above the first strip-shaped gap. The first strip-shaped gap can well separate the first left guide surface from the first right guide surface, and the second strip-shaped gap can well separate the second left guide surface from the second right guide surface, so that the staff can more easily identify that the left pin is between the first left guide surface and the second left guide surface, and the right pin is between the first right guide surface and the second right guide surface.

[0010] Compared with the prior art, the utility model has the following advantages:

[0011] The left and right pins of the U-shaped pin of the utility model can be properly guided and processed during the mold closing process, so that the left and right pins of the U-shaped pin are staggered up and down. After the next bending and crossing process is completed, it can be seen from the side of the U-shaped pin that the left pin and the right pin are staggered at a certain angle. After the bending and crossing are completed, the left and right pins of the U-shaped pin can increase the deflection, improve the clamping firmness of the resistor chip, and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0013] Figure 2 yes Figure 1 The main view;

[0014] Figure 3 yes Figure 1 Left view of the middle and lower molds;

[0015] Figure 4 yes Figure 1 Right view of the middle and lower molds;

[0016] Figure 5 yes Figure 1Top view of the middle and lower molds;

[0017] Figure 6 It is a schematic structural diagram of the left pin of the embodiment of the utility model being in the first guide gap;

[0018] Figure 7 It is a schematic structural diagram of the right pin of the embodiment of the utility model being in the second guide gap;

[0019] Figure 8 This is a schematic diagram of the structure in which the left and right pins are staggered up and down in the embodiment of the utility model;

[0020] Fig. 9 This is a schematic diagram of the structure in which the left and right pins are bent and crossed in the embodiment of the utility model;

[0021] Fig.10 It is a side structural diagram of two pins cross-arranged in the background technology of the utility model;

[0022] Fig.11 It is a structural schematic diagram of a resistor chip clamped between two cross pins in the background technology of the utility model. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figure 1-9 As shown, the lead-out terminal forming mold of the ultra-high voltage varistor in this embodiment includes an upper mold 1, a lower mold 2 and an opening and closing driving mechanism (not shown in the figure) capable of driving the upper mold 1 and the lower mold 2 to open and close. A first left guide surface 11 and a first right guide surface 12 are provided on the lower end surface of the upper mold 1. The first left guide surface 11 gradually tilts upward from front to back, and the first right guide surface 12 gradually tilts downward from front to back. The upper end surface of the lower mold 2 is provided with a second left guide surface 21 corresponding to the first left guide surface 11. The lower mold 2 The upper end surface is also provided with a second right guide surface 22 corresponding to the first right guide surface 12, the second left guide surface 21 gradually tilts upward from front to back, and the second right guide surface 22 gradually tilts downward from front to back; when the upper mold 1 and the lower mold 2 are in a mold closing state, a first guide gap 3 gradually tilts upward from front to back is formed between the first left guide surface 11 and the second left guide surface 21, and a second guide gap 4 gradually tilts downward from front to back is formed between the first right guide surface 12 and the second right guide surface 22.

[0025] During operation, the upper mold 1 and the lower mold 2 are first driven by the opening and closing driving mechanism to perform a mold opening action, and then the outer section of the left pin 51 of the U-shaped pin 5 is placed between the first left guide surface 11 and the second left guide surface 21, and the outer section of the right pin 52 of the U-shaped pin 5 is placed between the first right guide surface 12 and the second right guide surface 22; then, the upper mold 1 and the lower mold 2 are driven by the opening and closing driving mechanism to perform a mold closing action, so that the left pin 51 is in the first guide gap 3 and the outer section of the left pin 51 will gradually be guided to a specific direction, the right pin 52 is in the second guide gap 4 and the outer section of the left pin 51 will gradually be guided to a specific direction, with the further mold closing and extrusion of the upper mold 1 and the lower mold 2, there is a gradually tightening space that prompts the outer sections of the left and right pins to form appropriate bends, the outer section of the left pin 51 is squeezed to gradually bend upward from front to back, and the outer section of the right pin 52 is squeezed to gradually bend downward and tilt from front to back. The outer section of the left pin 51 has an upward bending angle of 5°-20°, and the outer section of the right pin 52 has a downward bending angle of 5°-20°.

[0026] The first left guide surface 11 includes a first lower left plane 111, a first left inclined surface 112 and a first upper left plane 113 connected in sequence from front to back, and the first upper left plane 113 is higher than the first lower left plane 111; the second left guide surface 21 includes a second lower left plane 211, a second left inclined surface 212 and a second upper left plane 213 connected in sequence from front to back, and the second upper left plane 213 is higher than the second lower left plane 211; the second lower left plane 211 corresponds to the first lower left plane 111, the second left inclined surface 212 corresponds to the first left inclined surface 112, and the second upper left plane 213 corresponds to the first upper left plane 113; the first right guide surface 12 includes a first lower left plane 211, a second left inclined surface 212 and a second upper left plane 213 connected in sequence from front to back, and the second upper left plane 213 is higher than the second lower left plane 211; the second lower left plane 211 corresponds to the first lower left plane 111, the second left inclined surface 212 corresponds to the first left inclined surface 112, and the second upper left plane 213 corresponds to the first upper left plane 113; The upper right plane 121, the first right inclined plane 122 and the first lower right plane 123, the first upper right plane 121 is higher than the first lower right plane 123; the second right guide surface 22 includes the second upper right plane 221, the second right inclined plane 222 and the second lower right plane 223 connected in sequence from front to back, the second upper right plane 221 is higher than the second lower right plane 223; the second upper right plane 221 corresponds to the first upper right plane 121, the second right inclined plane 222 corresponds to the first right inclined plane 122, and the second lower right plane 223 corresponds to the first lower right plane 123; the first lower left plane 111 is flush with the first upper right plane 121, and the second lower left plane 211 is flush with the second upper right plane 221. When the upper mold 1 and the lower mold 2 are in the mold closing state, the outer section of the left pin 51 is gradually guided to bend upward along the gap between the second lower left plane 211 and the first lower left plane 111, the gap between the second left inclined surface 212 and the first left inclined surface 112, and the gap between the second upper left plane 213 and the first upper left plane 113; the outer section of the right pin 52 is gradually guided to bend downward along the gap between the second upper right plane 221 and the first upper right plane 121, the gap between the second right inclined surface 222 and the first right inclined surface 122, and the gap between the second lower right plane 223 and the first lower right plane 123.

[0027] The first lower left plane 111 and the first left inclined plane 112 have a first left step 114, the first upper right plane 121 and the first right inclined plane 122 have a first right step 124; the second lower left plane 211 and the second left inclined plane 212 have a second left step 214, the second upper right plane 221 and the second right inclined plane 222 have a second right step 224, the second left step 214 corresponds to the first left step 114, and the second right step 224 corresponds to the first right step 124. When the upper mold 1 and the lower mold 2 are in the mold closing state, the second left step 214 corresponds to the first left step 114, and the second right step 224 corresponds to the first right step 124, which helps to accurately control the specific position of the left and right pins during the bending process. Due to the precise alignment of the inclined plane and the step, the bending angle and position of the U-shaped pin 5 formed each time can be kept consistent.

[0028] A first strip gap 6 extending forward and backward is provided between the first left guide surface 11 and the first right guide surface 12; a second strip gap 7 extending forward and backward is provided between the second left guide surface 21 and the second right guide surface 22, and the second strip gap 7 is located directly above the first strip gap 6. The first strip gap 6 can well separate the first left guide surface 11 from the first right guide surface 12, and the second strip gap 7 can well separate the second left guide surface 21 from the second right guide surface 22, so that the staff can more easily identify that the left pin 51 is between the first left guide surface 11 and the second left guide surface 21, and the right pin 52 is between the first right guide surface 12 and the second right guide surface 22.

[0029] In addition, it should be noted that the names of the various parts of the specific embodiments described in this specification may be different, and any equivalent or simple changes made based on the structure, features and principles described in the utility model patent concept are included in the protection scope of the utility model patent. The technical personnel of the technical field to which the utility model belongs can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the protection scope of the utility model.

Claims

1. A lead-out terminal forming die for an ultra-high voltage varistor, comprising an upper die, a lower die and an opening and closing driving mechanism capable of driving the upper die and the lower die to open and close, characterized in that: A first left guide surface and a first right guide surface are provided on the lower end surface of the upper mold, the first left guide surface gradually tilts upward from front to back, and the first right guide surface gradually tilts downward from front to back; a second left guide surface corresponding to the first left guide surface is provided on the upper end surface of the lower mold, and a second right guide surface corresponding to the first right guide surface is also provided on the upper end surface of the lower mold, the second left guide surface gradually tilts upward from front to back, and the second right guide surface gradually tilts downward from front to back; when the upper mold and the lower mold are in a mold closing state, a first guide gap gradually tilted upward from front to back is formed between the first left guide surface and the second left guide surface, and a second guide gap gradually tilted downward from front to back is formed between the first right guide surface and the second right guide surface.

2. The lead-out terminal forming mold of the ultra-high voltage varistor according to claim 1, characterized in that: The first left guide surface includes a first lower left plane, a first left inclined plane and a first upper left plane connected in sequence from front to back, and the first upper left plane is higher than the first lower left plane; the second left guide surface includes a second lower left plane, a second left inclined plane and a second upper left plane connected in sequence from front to back, and the second upper left plane is higher than the second lower left plane; the second lower left plane corresponds to the first lower left plane, the second left inclined plane corresponds to the first left inclined plane, and the second upper left plane corresponds to the first upper left plane; the first right guide surface includes a first upper right plane, a first right inclined plane and a first lower right plane connected in sequence from front to back, and the first upper right plane is higher than the first lower right plane; the second right guide surface includes a second upper right plane, a second right inclined plane and a second lower right plane connected in sequence from front to back, and the second upper right plane is higher than the second lower right plane; the second upper right plane corresponds to the first upper right plane, the second right inclined plane corresponds to the first right inclined plane, and the second lower right plane corresponds to the first lower right plane; the first lower left plane is flush with the first upper right plane, and the second lower left plane is flush with the second upper right plane.

3. The lead-out terminal forming mold of the ultra-high voltage varistor according to claim 2, characterized in that: The first lower left plane and the first left inclined surface have a first left step, and the first upper right plane and the first right inclined surface have a first right step; the second lower left plane and the second left inclined surface have a second left step, and the second upper right plane and the second right inclined surface have a second right step, the second left step corresponds to the first left step, and the second right step corresponds to the first right step.

4. The lead-out terminal forming mold of the ultra-high voltage varistor according to claim 1, characterized in that: A first strip-shaped gap extending forward and backward is provided between the first left guide surface and the first right guide surface; a second strip-shaped gap extending forward and backward is provided between the second left guide surface and the second right guide surface, and the second strip-shaped gap is located directly above the first strip-shaped gap.

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