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

Abstract

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

[0002] Porcelain insulators are usually made of porcelain material into wet blanks, which are then processed into porcelain parts through a series of processes such as blank shaping and baking, and finally glued together with metal parts. Among them, disc-shaped suspension porcelain insulators with multi-layer umbrella structures are mainly used for overhead transmission lines that are resistant to dirty environments; compared with disc-shaped suspension porcelain insulators with single umbrella structures, their external dimensions are larger and their shapes are complex, and the manufacturing process is cumbersome. Especially for high-tonnage and large-sized disc-shaped suspension porcelain insulators with multi-layer umbrella structures used in ultra-high and extra-high voltage power grids, the umbrella size is larger, which increases the difficulty of blank shaping.

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

[0004] The method of cutting by rotating the cutting tool and feeding it requires the operator to provide support force (pulling force) to the tool from the side, otherwise the resistance of the tool feeding during the rotation of the wet blank will cause the tool to vibrate, which is likely to cause the wet blank and / or the tool to be scrapped. However, providing support force to the tool from the side affects the discharge of the cutting residue, which is likely to cause non-smooth defects on the outer contour of the umbrella after cutting, and even cause the green blank to be scrapped due to appearance defects, and related defects such as cracking of the porcelain part caused by the appearance defects of the green blank, affecting the finished product yield and performance of the porcelain insulator.

[0005] In addition, for multi-layer umbrella structures, tool changing 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 repairing, 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. Summary of the invention

[0007] In view of the above-mentioned deficiencies in the prior art, the present invention proposes a linear feed blank repairing tool for one-time forming of multi-layer umbrellas of disc-shaped suspended porcelain insulators, which can perform one-time blank repairing and forming of multi-layer umbrella structures.

[0008] The present invention relates to a linear feeding 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 knife body is fixedly connected to the knife holder and is provided with an integrally arranged knife 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 present invention has the following technical effects:

[0017] 1) For the disc-shaped suspension porcelain insulator with a multi-layer umbrella structure, the present invention can perform one-time cutting and trimming with one tool to obtain all umbrella structures, which greatly improves the trimming efficiency; taking a three-layer umbrella as an example, the conventional tool needs to be changed twice, while the present invention does not need to change the tool, and the cutting time is reduced by about 2 / 3;

[0018] 2) Compared with the tool that keeps tangential to the mud section and feeds the cutting by rotation, the tool of the present invention feeds the cutting in a straight line direction; by setting the extension plate and the tool body reinforcement assembly, during the cutting process, there is no need to artificially support and strengthen the tool body from the side, and the residual material generated by cutting is discharged through the extension plate guide without contact and adhesion with the wet blank; not only the mud is discharged smoothly and conveniently, the non-smooth transition at the junction of the upper and lower umbrella body contours during the cutting process is avoided, and the quality of the blank is improved, and the residual material can fall into the designated area, avoiding the residual material 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 It is a structural schematic diagram of the blank repairing tool in Example 1;

[0021] Figure 2 It is a structural schematic diagram of the tool holder in Example 1;

[0022] Figure 3 It is a structural schematic diagram 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 modes.

[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 repair tool. The blank repair 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 gear rack mechanism; the tool holder 200 is fixed to the displacement execution end of the linear displacement mechanism by bolts.

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

[0030] Preferably, a blade reinforcement support 203 is provided on the transverse frame 201 corresponding to the middle position of the upper umbrella surface and the root position of the upper umbrella surface of the upper umbrella body (close to the glue-fitted 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 203.

[0032] like Figure 3 and Figure 4 As shown, the blade body 300 includes a blade and an extension plate 301 welded together, and the welding requires full welding, and no cold welding, spot welding or leaking welding, and the welds should 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 contour of the three umbrella bodies; the outer contour of the three umbrella bodies refers to a longitudinal section (Z-axis direction) obtained by half-sectioning along the symmetry axis of the wet blank, and 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 triangle cross section according to a preset blank umbrella shape and size; the transition after bending should be smooth to avoid processing defects such as undesirable grooves, serrated grooves, bending deformations, and protrusions, so that it can be used to cut mud blanks to obtain a smooth umbrella body contour.

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

[0036] The extension plate 301 is preferably a metal plate with a thickness of 1 mm, and is welded and fixed to the blade reinforcement support 203; on the one hand, the support of the blade reinforcement support 203, the horizontal frame 201 and the vertical frame 202 can reduce the vibration of the blade to a tolerable range during cutting, and on the other hand, it can guide the residual material generated during cutting to be discharged to the designated area, so as to avoid the residual material from accumulating and stagnating in the cutting area of ​​the umbrella body, causing non-smooth defects on the surface of the umbrella body, and being thrown out to any area under the action of centrifugal force, requiring manual continuous auxiliary mud removal;

[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 the residual 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 at the center of the support 500, and the support 500 is rotated 360° around the Z axis;

[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 actuated to drive the tool holder 200 to feed along the Y-axis toward the wet blank to be formed, and progressive cutting is performed 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 a linear motion with 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 limit the present invention in any form. 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 blank repairing tool for one-time forming of multi-layer umbrellas of disc-shaped suspension porcelain insulators, characterized in that: include: Feeder with retractable setting; A tool holder, fixedly connected to the telescopic displacement end of the tool feeder; as well as The knife body is fixedly connected to the knife holder and is provided with an integrally arranged knife blade and an extension plate; The blade includes an end blade portion and an umbrella blade portion, which are 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 the 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, and an acute angle in the acute triangle is used for cutting facing 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 knife holder is in an inverted L shape, including a transverse frame and a vertical frame. Both the transverse frame and the vertical frame are provided with a plurality of knife body reinforcement supports, which are fixedly connected to the extension plate for supporting and reinforcing the knife 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 upper umbrella body in the porcelain insulator, a plurality of blade body reinforcement support members are arranged on the transverse frame.

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