Linear feeding fettling cutter for one-step forming of multilayer umbrella of disc-shaped suspension type porcelain insulator

Abstract

The utility model discloses a linear feeding fettling cutter for one-step forming of a multilayer umbrella of a disc-shaped suspension type porcelain insulator, and belongs to the technical field of porcelain insulator processing. The linear feeding fettling cutter for one-time forming of the multilayer umbrella of the disc-shaped suspension type porcelain insulator comprises a cutter feeder which is arranged in a telescopic mode. The tool rest is fixedly connected with the telescopic displacement end of the tool feeder; the knife body is fixedly connected with the knife rest; the blade and the extension plate are integrally arranged; the blade comprises an end blade part and an umbrella blade part; the umbrella blade part is matched with the outer contour of the multi-layer umbrella, and the end blade part extends outwards from one end of the umbrella blade part and is arranged between the cementing end part of the disc-shaped suspension type porcelain insulator and the upper umbrella surface of the upper umbrella body. The multi-layer umbrella structure can be fettled and formed at a time.

Description

Technical Field

[0001] The utility model relates to a technology in the field of porcelain insulator processing, in particular to a linear feed blank repairing tool used for one-time forming of multi-layer umbrellas of disc-shaped suspended porcelain insulators. Background Art

[0002] Porcelain insulators are typically made from a green blank of porcelain material. This blank undergoes a series of processes, including trimming, shaping, and firing, before being assembled with metal components. Disc-shaped suspension insulators with multi-layered umbrellas are primarily used for overhead transmission lines designed to withstand polluted environments. Compared to single-bay insulators, these insulators are larger and more complex, making the manufacturing process more complex. This is especially true for high-tonnage, large-scale disc-shaped suspension insulators used in ultra-high and ultra-high voltage (UHV) power grids, where the umbrellas are larger, making trimming more difficult.

[0003] Conventional multi-layer umbrella-structured disc-shaped suspension porcelain insulators are formed through the following process: the wet blank to be formed is placed at the center of a support and rotated 360 degrees continuously with the support; a corresponding single-body cutting tool is selected according to the size of each umbrella body and mounted on a fixed tool holder. The distance between the tool holder and the support is fixed, and the cutting tool is rotatable relative to the tool holder; during the forming process, the cutting tool is gradually rotated to keep the cutting tool edge tangent to the wet blank to be formed (to facilitate cutting feed), and the rotating wet blank is progressively cut from the outer layer to the inner layer, and finally each umbrella body is cut into shape in sequence.

[0004] The rotary feed cutting method requires the operator to provide lateral support (tension) to the tool. Otherwise, the resistance to the tool feed during the rotation of the wet blank will cause tool vibration, which can easily lead to the scrapping of the wet blank and / or the tool. However, providing lateral support to the tool affects the discharge of cutting residue, which can easily cause unevenness in the outer contour of the shed after cutting, and even lead to the scrapping of the green blank due to cosmetic defects. These cosmetic defects can also cause cracking in the porcelain parts, affecting the yield and performance of the finished porcelain insulator.

[0005] In addition, for multi-layer umbrella structures, tool change operations are required. Taking a three-layer umbrella as an example, the tool needs to be changed twice, which not only reduces the efficiency of blank repair, but also increases the probability of non-smooth defects.

[0006] In order to solve the above problems in the prior art, the present invention is provided. Utility Model Content

[0007] Aiming at the above-mentioned deficiencies in the prior art, the utility model proposes a linear feed blank trimming tool for one-step molding of multi-layer umbrellas of disc-shaped suspended porcelain insulators, which can perform one-step molding of multi-layer umbrella structures.

[0008] The utility model relates to a linear feed blank repairing tool for one-step forming of a multi-layer umbrella of a disc-shaped suspended porcelain insulator, comprising:

[0009] Feeder with retractable setting;

[0010] a tool holder fixedly connected to the telescopic displacement end of the tool feeder; and

[0011] The blade body is fixedly connected to the blade holder and is provided with an integral blade and an extension plate;

[0012] The blade includes an end blade portion and an umbrella blade portion; the umbrella blade portion is arranged corresponding to the outer contour of the multi-layer umbrella, including an upper umbrella body blade portion; the end blade portion extends outward from the upper umbrella body blade portion and is used to cooperate with the upper umbrella body blade portion to form the upper umbrella surface of the upper umbrella body in the disc-shaped suspension porcelain insulator.

[0013] The extension plate is used to support the blade and discharge the cutting residue. The extension length of the extension plate is not less than the radius of the disc-shaped suspension porcelain insulator wet blank, preferably, not less than the diameter of the disc-shaped suspension porcelain insulator wet blank.

[0014] For some specific embodiments, the blade is a metal strip with an acute triangle cross-section, and one acute angle in the acute triangle is used for cutting facing the wet blank; preferably, the acute angle used for cutting does not exceed 30°, for example 30°, 20°, 15°, etc.

[0015] For some specific implementation schemes, a blade body reinforcement support is provided on the blade holder, and the blade body reinforcement support is fixedly connected to the extension plate for supporting and reinforcing the blade.

[0016] Compared with conventional single umbrella body forming tools and forming methods, the utility model has the following technical effects:

[0017] 1) For disc-shaped suspension porcelain insulators with multi-layer umbrella structures, the utility model can use a single tool to perform one-time cutting and trimming, forming all umbrella structures, greatly improving the trimming efficiency. Taking a three-layer umbrella as an example, conventional tools need to be changed twice, while the utility model does not require tool change, reducing the cutting time by about 2 / 3.

[0018] 2) Compared with the cutting tool that feeds and cuts in a rotating manner while maintaining a tangential state with the mud section, the cutting tool of the present invention feeds and cuts in a straight line. By providing an extension plate and a blade reinforcement assembly, the cutting tool no longer needs to be artificially supported and reinforced from the side during the cutting process. The residual material generated by cutting is discharged through the extension plate without contact or adhesion with the wet blank. Not only is the mud discharge smooth and convenient, avoiding the non-smooth transition at the junction of the upper and lower umbrella body contours during the cutting process, thus improving the blank repair quality, but the residual material can fall into a designated area, preventing the residual material from being thrown out arbitrarily by the centrifugal force of the mud section, and reducing the labor intensity of auxiliary cutting operations such as residual material cleaning.

[0019] 3) The straight line feed method is used to cut the mud segment, which reduces the impact of the mud segment's centrifugal force on the tool, thereby reducing the cutting resistance, further achieving smooth cutting and improving the quality of the blank. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the structure of the blank repair tool in Example 1;

[0021] Figure 2 Schematic diagram of the structure of the tool holder in Example 1;

[0022] Figure 3 Schematic diagram of the structure of the blade body in Example 1;

[0023] Figure 4 This is a schematic diagram of the trimming state of the trimming tool in Example 1;

[0024] In the figure: 100, feeder; 200, tool holder; 300, tool body; 201, horizontal frame; 202, vertical frame; 301, extension plate; 302, end blade; 303, umbrella blade; 400, wet blank; 500, support. DETAILED DESCRIPTION

[0025] The present invention is described in detail below with reference to the accompanying drawings and specific implementation methods.

[0026] Example 1

[0027] like Figure 1 and Figure 4 As shown, this embodiment takes a three-layer umbrella structure disc-shaped suspension porcelain insulator as an example to illustrate the structure and method of the blank trimming tool. The blank trimming tool comprises: a retractable feeder 100, a tool holder 200 and a tool body 300.

[0028] The feeder 100 is provided with a linear displacement mechanism, such as a rack and pinion mechanism; the tool holder 200 is fixed to the displacement execution end of the linear displacement mechanism by means of bolts.

[0029] like Figure 2 As shown, the tool holder 200 is in an inverted L-shape and includes a horizontal frame 201 and a vertical frame 202. Both the horizontal frame 201 and the vertical frame 202 are provided with a plurality of tool body reinforcement supports 203; the tool body reinforcement supports 203 are welded and fixed to the tool body 300 to provide support to the tool body 300 during the tool feeding process;

[0030] Preferably, a blade reinforcement support 203 is provided on the transverse frame 201 at the middle position of the upper umbrella surface and the root position of the upper umbrella surface corresponding to the upper umbrella body (close to the glue-attached end) in the porcelain insulator;

[0031] Preferably, corresponding to the umbrella edge of each layer of umbrella, the vertical frame 202 is provided with a blade reinforcement support member 203.

[0032] like Figure 3 and Figure 4 As shown, the blade body 300 includes a blade and an extension plate 301 welded together. The welding requires full welding, no cold welding, spot welding or leaking welding, and the welds should all be polished smooth. The blade includes an end blade portion 302 and an umbrella blade portion 303.

[0033] The blade portion 303 matches the outer contours of the three umbrella bodies; the outer contours of the three umbrella bodies refer to the longitudinal section (Z-axis direction) obtained by half-sectioning along the symmetry axis of the wet blank. The longitudinal section is a continuous outer edge contour starting from the root of the upper umbrella surface of the upper umbrella body, passing through the upper umbrella body, the middle umbrella body, and ending at the umbrella edge of the lower umbrella body; the end blade portion 302 extends outward from the blade portion of the upper umbrella body and is used to cooperate with the blade portion of the upper umbrella body to form the upper umbrella surface of the upper umbrella body in the disc-shaped suspension porcelain insulator.

[0034] The blade is preferably formed by bending a metal strip with an acute triangular cross-section according to the preset umbrella shape and size of the blank; the transition after bending should be smooth to avoid processing defects such as undesirable grooves, serrations, bending deformations, and protrusions, so that it can be used to cut the mud blank to obtain a smooth umbrella body contour.

[0035] One acute angle in the acute triangle is used for cutting facing the wet blank; in this embodiment, the acute angle used for cutting is preferably 30°.

[0036] The extension plate 301 is preferably a 1mm thick metal plate, welded to the blade reinforcement support 203. The support of the blade reinforcement support 203, the transverse frame 201, and the vertical frame 202 can reduce the vibration of the blade during cutting to a tolerable range. Furthermore, it can guide the excess material generated during cutting to a designated area, preventing it from accumulating and stagnating in the area where the umbrella is being cut, causing uneven surface defects on the umbrella body, and from being thrown to any area under the action of centrifugal force, requiring continuous manual assistance to remove the mud.

[0037] The extension length of the extension plate 301 is not less than the radius of the disc-shaped suspension porcelain insulator wet blank, preferably not less than the diameter of the disc-shaped suspension porcelain insulator wet blank, so as to facilitate the discharge of excess material.

[0038] like Figure 4 As shown, the working process of this embodiment is as follows.

[0039] The wet blank 400 to be formed is placed on the center of the support 500 and rotates continuously 360° around the Z axis along with the support 500;

[0040] According to the design size of the porcelain insulator, the tool holder 200 welded with the corresponding tool body 300 is fixed on the linear displacement mechanism of the feeder 100; the linear displacement mechanism is activated to drive the tool holder 200 to feed along the Y-axis toward the wet blank to be formed, and perform progressive cutting from the outer layer to the inner layer, and finally the three umbrella bodies are cut and formed at one time to obtain a formed wet blank 400; finally, the tool holder 200 is driven to retract along the Y-axis in the direction away from the formed wet blank. During the feeding and retracting process, the tool holder 200 performs linear motion along the linear displacement mechanism, and the cutting resistance is small.

[0041] It should be emphasized that the above are only preferred embodiments of the present invention and do not constitute any form of limitation to the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A linear feed blanking tool for one-step forming of multi-layer umbrellas of disc-shaped suspension porcelain insulators, characterized in that: include: Feeder with retractable setting; The tool holder is fixedly connected to the telescopic displacement end of the tool feeder; as well as The blade body is fixedly connected to the blade holder and is provided with an integral blade and an extension plate; The blade includes an end blade portion and an umbrella blade portion, which is used for cutting and forming a multi-layer umbrella; the umbrella blade portion is arranged corresponding to the outer contour of the multi-layer umbrella, including an upper umbrella body blade portion; the end blade portion extends outward from the upper umbrella body blade portion, and is used to cooperate with the upper umbrella body blade portion to form the upper umbrella surface of the upper umbrella body in a disc-shaped suspension porcelain insulator.

2. The linear feed trimming tool according to claim 1, characterized in that: The blade is a metal strip with an acute triangle cross section, wherein an acute angle of the acute triangle is used for cutting the wet blank.

3. The linear feed trimming tool according to claim 2, characterized in that: The acute angle used for cutting does not exceed 30°.

4. The linear feed trimming tool according to claim 1, characterized in that: The extension length of the extension plate is not less than the radius of the disc-shaped suspension porcelain insulator wet blank.

5. The linear feed trimming tool according to claim 4, characterized in that: The extension length of the extension plate is not less than the diameter of the disc-shaped suspension porcelain insulator wet blank.

6. The linear feed trimming tool according to claim 1, characterized in that: The blade holder is in an inverted L shape and includes a horizontal frame and a vertical frame. Both the horizontal frame and the vertical frame are provided with a plurality of blade reinforcement supports, which are fixedly connected to the extension plate for supporting and reinforcing the blade.

7. The linear feed trimming tool according to claim 6, characterized in that: Corresponding to the middle position of the upper umbrella surface and the root position of the upper umbrella surface of the porcelain insulator, the transverse frame is provided with a plurality of blade body reinforcement support members.

8. The linear feed trimming tool according to claim 6, characterized in that: Corresponding to the umbrella edge of each layer of umbrella, the vertical frame is provided with a blade body reinforcement support.

9. The linear feed trimming tool according to claim 1, characterized in that: The blade and the extension plate are fixed by welding.

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