Machining clamp of annular piezoresistor

Abstract

The utility model provides a processing fixture of annular piezoresistor, including: lower die and upper cover plate, lower die includes lower die frame, install a plurality of lower fixture module group in the lower die frame, each lower fixture module group includes six lower fixture, six lower fixture end-to-end connection form regular hexagon distribution, the lower fixture includes annular locating seat, the annular locating seat is located in the lower die frame, and the upper cover plate is located in the annular locating seat. The center of the annular positioning seat is provided with a center positioning protrusion, the end edge of the annular positioning seat is provided with three end edge limiting butt-joint protrusions which are distributed in a circumferential array mode with the center of the annular positioning seat as the circle center, and each end edge limiting butt-joint protrusion is connected with the center positioning protrusion through a gap shielding belt. The adjacent lower clamps are connected through end edge limiting butt joint protrusions. The annular varistor processing clamp can clamp a plurality of annular varistors at one time, and a plurality of surfaces of the annular varistors can be exposed after clamping, so that the plurality of surfaces of the annular varistors can be processed at one time, and the working procedure times are greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of varistor processing, in particular to a processing fixture for an annular varistor. Background Art

[0002] Ring varistors have special nonlinear current-voltage characteristics and are mainly used in DC iron core motors. The structure of existing ring varistors is as follows: Figure 1 As shown, the annular resistor 100 is provided with at least three electrodes 200, with adjacent electrodes 200 separated by an electrode gap 300. In the prior art, after the annular resistor 100 is produced, the three electrodes 200 need to be machined onto the annular resistor 100. The machining methods for the electrodes 200 mainly include sputtering, electroplating, silk screen printing, or coating. During the machining process, a machining fixture is required to secure the annular resistor 100. Existing resistor processing fixtures have complex structures and low processing efficiency. For example, Chinese Patent Publication No. CN107175525A discloses a zinc oxide resistor processing fixture comprising a housing, a fixed seat disposed at the lower right end of the housing, a first rotating shaft disposed above the motor, and a workbench disposed above the second rotating shaft. Slideways are provided on the left, right, and front and rear sidewalls of the resistor placement platform, each equipped with a slider. The sliders have bosses on their upper ends. Each boss is provided with a hydraulic cylinder assembly on the side proximal to the resistor placement platform. A piston rod is provided on the side of the hydraulic cylinder assembly, and an arc-shaped clamping block is attached to one end of the piston rod. In this zinc oxide resistor processing fixture, the resistor to be processed is placed on the resistor placement platform. The slider is adjusted to move along the slideway, and then the slider is locked with a bolt. The hydraulic cylinder assembly is then activated to drive the arc-shaped clamping block on the piston rod to clamp the resistor to be processed. Activating the motor rotates the workbench, allowing the resistor to be processed to be rotated. However, the above-mentioned fixture still has a complex structure, and the number of resistors that can be clamped and processed at one time is small, and the clamping and processing efficiency of the resistors is low. Moreover, after the existing fixture clamps the resistors, multiple surfaces of the resistors cannot be exposed, so multiple surfaces of the resistors cannot be sputtered, electroplated, silk-screened or coated at one time, so it is necessary to improve it. Utility Model Content

[0003] In response to the shortcomings of the existing technology, the utility model proposes a processing fixture for annular varistors, which has a simple structure and ingenious design. It can clamp and process multiple annular varistors at one time, which can greatly improve the clamping and processing efficiency of annular varistors. Moreover, after clamping, multiple surfaces of the annular varistors can be exposed, and one-time sputtering, electroplating, silk screen printing or coating processing can be realized on multiple surfaces of the annular varistors.

[0004] In order to realize the above technical solution, the utility model provides a processing fixture for an annular varistor, comprising: a lower mold and an upper cover plate, the upper cover plate is covered on the lower mold, the lower mold comprises a lower mold frame, a plurality of lower fixture modules are installed in the lower mold frame, each lower fixture module comprises six lower fixtures, the six lower fixtures are connected end to end to form a regular hexagonal distribution, the lower fixture comprises an annular positioning seat, the center of the annular positioning seat is provided with a center positioning protrusion, and the end edge of the annular positioning seat is provided with three end edge limiting docking protrusions distributed in a circular array with the center of the annular positioning seat as the center of the circle, each end edge limiting docking protrusion is connected to the center positioning protrusion by a gap shielding belt, and adjacent lower fixtures are connected by end edge limiting docking protrusions.

[0005] In the above technical solution, during actual work, it is only necessary to snap the annular varistor that needs to be processed into the annular positioning seat of the lower fixture, and accurately limit it through the center positioning protrusion and the end limit docking protrusion. After the annular varistor is installed on each lower fixture, the upper cover plate can be covered. The precise positioning and clamping of multiple annular varistors can be achieved, and the upper surface and outer side of the annular resistor can be exposed. The clamped fixture is then sent to the next process for sputtering, electroplating, silk screen printing or coating of the electrode, thereby greatly improving the efficiency of clamping and processing of the annular varistor, and realizing one-time sputtering, electroplating, silk screen printing or coating of the upper surface and outer side of the annular varistor, which greatly improves the processing efficiency of the surface of the annular varistor.

[0006] Preferably, the upper cover plate includes an upper cover plate frame, within which are mounted the same number of upper fixture modules as the lower fixture modules in the lower mold. Each upper fixture module corresponds to a lower fixture module, and each upper fixture module includes six upper fixtures, which are connected end to end in a regular hexagonal arrangement. The upper fixture includes a cover plate, which has the same size as the center positioning protrusion in the lower fixture, and adjacent cover plates are connected by connecting columns. During actual operation, after the upper cover plate is placed on the lower mold, the cover plate in each upper fixture corresponds to the center positioning protrusion in the lower fixture, thereby exposing multiple surfaces of the fixed annular varistor while fixing it, thereby facilitating subsequent sputtering, electroplating, silk screen printing, or coating of the electrode.

[0007] Preferably, center positioning rings are installed at the centers of the lower mold and the upper cover plate to facilitate accurate alignment and installation of the lower mold and the upper cover plate during actual processing.

[0008] Preferably, a lower center clamp is installed at the center of each lower clamp module. The structure of the lower center clamp is the same as that of the lower clamp. The three end-limiting docking protrusions of the lower center clamp are connected to the three end-limiting docking protrusions of the three lower clamps via connecting columns. This structural design allows for the addition of one more clamp to each lower clamp module, further increasing the space utilization of the clamps.

[0009] Preferably, an upper center clamp corresponding to the center positioning ring in the lower clamp module is installed at the center of each upper clamp module, and the structure of the upper center clamp is the same as that of the upper clamp to cover the lower center clamp.

[0010] The beneficial effect of the processing fixture of annular varistor provided by the utility model is that the processing fixture of the annular varistor is simple in structure and ingenious in design. It can clamp and process multiple annular varistors at one time, which can greatly improve the clamping and processing efficiency of the annular varistor. In actual work, it is only necessary to snap the annular varistor to be processed into the annular positioning seat of the lower fixture, and accurately limit it through the center positioning protrusion and the end limit docking protrusion. After the annular varistor is installed on each lower fixture, the upper cover plate can be covered, and the precise positioning and clamping of multiple annular varistors can be achieved, and the upper surface and outer side of the annular resistor can be exposed. Then, the clamped fixture is sent to the next process for sputtering, electroplating, silk screen printing or coating of the electrode, thereby greatly improving the clamping and processing efficiency of the annular varistor, and the upper surface and outer side of the annular varistor can be sputtered, electroplated, silk screen printed or coated at one time, which greatly improves the processing efficiency of the surface of the annular varistor. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the three-dimensional structure of a ring varistor in the prior art.

[0012] Figure 2 This is a top view of the lower mold in Example 1.

[0013] Figure 3 This is a top view of the lower clamp module in Example 1.

[0014] Figure 4 This is a top view of the lower clamp in Example 1.

[0015] Figure 5 This is a side view of the lower clamp in Example 1.

[0016] Figure 6 This is a bottom view of the upper cover plate in Example 1.

[0017] Figure 7This is a bottom view of the upper clamp module in Example 1.

[0018] Figure 8 This is a bottom view of the upper clamp in Example 1.

[0019] Figure 9 This is a top view of the lower mold in Example 2.

[0020] Figure 10 This is a top view of the lower clamp module in Example 2.

[0021] Figure 11 This is a bottom view of the upper cover plate in Example 2.

[0022] Figure 12 This is a bottom view of the upper clamp module in Example 2.

[0023] In the figure: 1. Lower mold frame; 2. Lower fixture module; 21. Lower fixture; 211. Center positioning protrusion; 212. Ring positioning seat; 213. Gap shielding tape; 214. End limit docking protrusion; 22. Lower center fixture; 3. Center positioning ring; 4. Upper cover frame; 5. Upper fixture module; 51. Upper fixture; 511. Cover; 512. Connecting column; 52. Upper center fixture; 100. Ring resistor; 200. Electrode; 300. Electrode gap. DETAILED DESCRIPTION

[0024] The following is a clear and complete description of the technical solutions in the embodiments of the present invention, in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary persons in this field without creative work are within the scope of protection of the present invention.

[0025] Example 1: A processing fixture for an annular varistor.

[0026] Reference Figures 1 to 8As shown, a processing fixture for an annular varistor includes: a lower mold and an upper cover plate, the upper cover plate is covered on the lower mold, the lower mold includes a lower mold frame 1, and fifteen lower fixture modules 2 are installed in the lower mold frame 1. Each lower fixture module 2 includes six lower fixtures 21, and each lower fixture 21 can clamp a corresponding annular varistor. That is, the processing fixture for the annular varistor can clamp 90 annular varistors at a time. The six lower fixtures 21 are connected end to end to form The lower clamp 21 is distributed in a regular hexagonal shape, and includes an annular positioning seat 212. A center positioning protrusion 211 is provided at the center of the annular positioning seat 212. Three end edge limiting docking protrusions 214 are provided on the end edge of the annular positioning seat 212, and are distributed in a circular array with the center of the annular positioning seat 212 as the center. Each end edge limiting docking protrusion 214 is connected to the center positioning protrusion 211 by a gap shielding belt 213, and adjacent lower clamps 21 are connected by the end edge limiting docking protrusions 214. During actual work, it is only necessary to snap the annular varistor that needs to be processed into the annular positioning seat 212 of the lower clamp 21, and accurately limit it through the center positioning protrusion 211 and the end limit docking protrusion 214. After the annular varistor is installed on each lower clamp 21, just cover the upper cover plate, and the precise positioning and clamping of 90 annular varistors can be achieved. Then the clamped fixture is sent to the next process for sputtering, electroplating, silk screen printing or coating of the electrode, thereby greatly improving the efficiency of clamping and processing of the annular varistors.

[0027] Reference Figures 6 to 8 As shown, the upper cover plate includes an upper cover plate frame 4, and the upper clamp modules 5 with the same number as the lower clamp modules in the lower mold are installed in the upper cover plate frame 4, each upper clamp module 5 corresponds to a lower clamp module 2, and each upper clamp module 5 includes six upper clamps 51, and the six upper clamps 51 are connected end to end to form a regular hexagonal distribution, and the upper clamp 51 includes a cover plate 511, and the cover plate 511 is the same size as the center positioning protrusion 211 in the lower clamp 2, and adjacent cover plates 511 are connected by connecting columns 512. During actual operation, after the upper cover is covered on the lower mold, the cover 511 in each upper clamp 51 is correspondingly covered on the central positioning protrusion 211 in the lower clamp 21, which can expose the upper surface and outer side of the fixed annular varistor while fixing the annular varistor, so as to facilitate the subsequent sputtering, electroplating, silk screen or coating processing of the electrode, thereby realizing a one-time sputtering, electroplating, silk screen or coating processing on the upper surface and outer side of the annular varistor, greatly improving the processing efficiency of the surface of the annular varistor.

[0028] Reference Figure 2 and Figure 6As shown, center positioning rings 3 are correspondingly installed at the centers of the lower mold and the upper cover plate to facilitate accurate alignment and installation of the lower mold and the upper cover plate during actual processing.

[0029] The processing fixture of the annular varistor is simple in structure and ingenious in design. It can clamp and process 90 annular varistors at one time, which can greatly improve the clamping and processing efficiency of the annular varistor. In actual work, it is only necessary to snap the annular varistor to be processed into the annular positioning seat 212 of the lower fixture 21, and accurately limit it through the center positioning protrusion 211 and the end limit docking protrusion 214. After the annular varistor is installed on each lower fixture 21, the upper cover can be covered, and the precise positioning and clamping of 90 annular varistors can be achieved. Then the clamped fixture is sent to the next process for sputtering, electroplating, silk screen printing or coating of the electrode, thereby greatly improving the efficiency of clamping and processing of the annular varistor. It can also realize one-time sputtering, electroplating, silk screen printing or coating processing on the upper surface and outer side of the annular varistor, which greatly improves the processing efficiency of the surface of the annular varistor.

[0030] Example 2: A processing fixture for an annular varistor.

[0031] Reference Figures 9 to 12 As shown, a processing fixture for an annular varistor includes: a lower mold and an upper cover plate, the upper cover plate is covered on the lower mold, the lower mold includes a lower mold frame 1, and fifteen lower fixture modules 2 are installed in the lower mold frame 1, each lower fixture module 2 includes six lower fixtures 21, and each lower fixture 21 can clamp a corresponding annular varistor, and the six lower fixtures 21 are connected end to end to form a regular hexagonal distribution, and the lower fixture 21 includes an annular positioning seat 212, and a center positioning protrusion 211 is provided at the center of the annular positioning seat 212, and three end edge limiting docking protrusions 214 are provided on the end edge of the annular positioning seat 212, which are distributed in a circular array with the center of the annular positioning seat 212 as the center of the circle, and each end edge limiting docking protrusion 214 is connected to the center positioning protrusion 211 by a gap shielding belt 213, and adjacent lower fixtures 21 are connected by end edge limiting docking protrusions 214. Each lower clamp module 2 is centrally mounted with a lower center clamp 22. This lower center clamp 22 has the same structure as the lower clamps. The three end-limiting butt joint projections in the lower center clamp 22 are connected to the three end-limiting butt joint projections of three of the lower clamps via connecting posts. This structural design allows for the addition of a clamp to each lower clamp module 2, further increasing the space utilization of the clamps. In other words, this annular varistor processing fixture can hold 105 annular varistors at a time.

[0032] During actual work, it is only necessary to snap the annular varistor that needs to be processed into the annular positioning seat 212 of the lower clamp 21, and accurately limit it through the center positioning protrusion 211 and the end limit docking protrusion 214. After the annular varistor is installed on each lower clamp 21 and the lower center clamp 22, just cover the upper cover plate, and the 105 annular varistors can be accurately positioned and clamped. Then the clamped clamp is sent to the next process for sputtering, electroplating, silk screen printing or coating of the electrode, which can greatly improve the efficiency of clamping and processing of the annular varistors.

[0033] Reference Figures 11 to 12 As shown, the upper cover includes an upper cover frame 4, in which the same number of upper fixture modules 5 as the lower fixture modules in the lower mold are installed. Each upper fixture module 5 corresponds to a lower fixture module 2. Each upper fixture module 5 includes six upper fixtures 51, which are connected end to end to form a regular hexagonal distribution. The upper fixture 51 includes a cover plate 511. The cover plate 511 is the same size as the center positioning protrusion 211 in the lower fixture 2. Adjacent cover plates 511 are connected by connecting columns 512. The center of each upper fixture module 5 is installed with an upper center fixture 52 corresponding to the center positioning ring 22 in the lower fixture module 2. The structure of the upper center fixture 52 is the same as that of the upper fixture 51 to achieve covering of the lower center fixture 22. During actual operation, after the upper cover plate is covered on the lower mold, the cover plate 511 in each upper clamp 51 is correspondingly covered on the center positioning protrusion 211 in the lower clamp 21, and the upper center clamp 52 is covered on the lower center clamp 22. While fixing the annular varistor, multiple surfaces of the fixed annular varistor can be exposed to facilitate subsequent sputtering, electroplating, silk screen or coating processing of the electrode, and then the upper surface and outer side of the annular varistor can be sputtered, electroplated, silk screen or coated at one time, which greatly improves the processing efficiency of the surface of the annular varistor.

[0034] Reference Figure 9 and Figure 11 As shown, center positioning rings 3 are correspondingly installed at the centers of the lower mold and the upper cover plate to facilitate accurate alignment and installation of the lower mold and the upper cover plate during actual processing.

[0035] The processing fixture of the annular varistor is simple in structure and ingenious in design. It can clamp and process 105 annular varistors at one time, which can greatly improve the clamping and processing efficiency of the annular varistors. In actual work, it is only necessary to snap the annular varistors to be processed into the annular positioning seats 212 of the lower fixture 21 and the lower center fixture 22, and accurately limit them through the center positioning protrusion 211 and the end limit docking protrusion 214. After the annular varistors are installed on each lower fixture 21 and the lower center fixture 22, the upper cover can be covered. The precise positioning and clamping of 105 annular varistors can be achieved, and then the clamped fixture can be sent to the next process for sputtering, electroplating, silk screen printing or coating of the electrode, thereby greatly improving the efficiency of clamping and processing of the annular varistors.

[0036] The above description is only a preferred embodiment of the present invention, but the present invention should not be limited to the contents disclosed in the embodiment and the drawings. Therefore, any equivalent or modification completed without departing from the spirit disclosed in the present invention shall fall within the scope of protection of the present invention.

Claims

1. A processing fixture for an annular varistor, comprising a lower die and an upper cover plate, wherein the upper cover plate is covered on the lower die, characterized in that: The lower mold includes a lower mold frame, and a plurality of lower clamp modules are installed in the lower mold frame, each lower clamp module includes six lower clamps, and the six lower clamps are connected end to end to form a regular hexagonal distribution, and the lower clamp includes an annular positioning seat, and a center positioning protrusion is provided at the center of the annular positioning seat, and three end edge limiting docking protrusions are provided on the end edge of the annular positioning seat, which are distributed in a circular array with the center of the annular positioning seat as the center of the circle, and each end edge limiting docking protrusion is connected to the center positioning protrusion by a gap shielding belt, and adjacent lower clamps are connected by end edge limiting docking protrusions.

2. The processing fixture for annular varistor according to claim 1, characterized in that: The upper cover plate includes an upper cover plate frame, and the upper clamp modules with the same number as the lower clamp modules in the lower mold are installed in the upper cover plate frame. Each upper clamp module corresponds to a lower clamp module. Each upper clamp module includes six upper clamps, and the six upper clamps are connected end to end to form a regular hexagonal distribution. The upper clamp includes a cover plate, and the center positioning protrusions in the cover plate and the lower clamp are the same size, and adjacent cover plates are connected by connecting columns.

3. The processing fixture for annular varistor according to claim 1, characterized in that: Center positioning rings are correspondingly installed at the centers of the lower mold and the upper cover plate.

4. The processing fixture for annular varistor according to claim 2, characterized in that: A lower center clamp is installed at the center of each lower clamp module. The structure of the lower center clamp is the same as that of the lower clamp. The three end edge limit docking protrusions in the lower center clamp are respectively connected to the three end edge limit docking protrusions of three of the lower clamps through connecting columns.

5. The processing fixture for annular varistor according to claim 4, characterized in that: An upper center fixture corresponding to the center positioning ring in the lower fixture module is installed at the center of each upper fixture module, and the structure of the upper center fixture is the same as that of the upper fixture.

Images