CN116373088A - Inner cavity trimming forming device for large-size insulator - Google Patents

Inner cavity trimming forming device for large-size insulator Download PDF

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Publication number
CN116373088A
CN116373088A CN202310524973.4A CN202310524973A CN116373088A CN 116373088 A CN116373088 A CN 116373088A CN 202310524973 A CN202310524973 A CN 202310524973A CN 116373088 A CN116373088 A CN 116373088A
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CN
China
Prior art keywords
trimming
insulator
rod body
cutter
inner cavity
Prior art date
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Pending
Application number
CN202310524973.4A
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Chinese (zh)
Inventor
叶宗发
邹君
黄远波
肖祥军
彭勇
谢启连
曾宏
朱世友
邓利
邹湘余
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Liling Huaxin Insulator Technology Co ltd
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Liling Huaxin Insulator Technology Co ltd
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Application filed by Liling Huaxin Insulator Technology Co ltd filed Critical Liling Huaxin Insulator Technology Co ltd
Priority to CN202310524973.4A priority Critical patent/CN116373088A/en
Publication of CN116373088A publication Critical patent/CN116373088A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00—Other grinding machines or devices
    • B24B27/033—Other grinding machines or devices for grinding a surface for cleaning purposes, e.g. for descaling or for grinding off flaws in the surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
    • B24B5/06—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces internally
    • B24B5/08—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces internally involving a vertical tool spindle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/08—Apparatus or processes for treating or working the shaped or preshaped articles for reshaping the surface, e.g. smoothing, roughening, corrugating, making screw-threads
    • B28B11/0845—Apparatus or processes for treating or working the shaped or preshaped articles for reshaping the surface, e.g. smoothing, roughening, corrugating, making screw-threads for smoothing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Insulating Bodies (AREA)

Abstract

The invention discloses an inner cavity trimming forming device of a large-size insulator, which comprises a frame and a trimming device, wherein the frame is provided with a plurality of trimming holes; the blank repairing device is arranged at the top of one side of the frame and comprises a main rod body and an auxiliary rod body, wherein the main rod body and the auxiliary rod body can extend into an inner cavity of the insulator from the top of the insulator, and both the main rod body and the auxiliary rod body can axially feed or withdraw along the insulator and can rotate through motor driving; the end part of the main rod body is provided with a main trimming cutter which is of a three-section structure and comprises a ball head polishing part, a round cutter disc and a disc trimming cutter which are sequentially arranged; the end part of the auxiliary rod body is provided with a cylindrical polishing rod; the cylindrical polishing rod in the processing state has a polishing surface which is attached to the surface of the inner cavity of the insulator after being processed by the main trimming cutter. The device can be used for carrying out inner cavity trimming operation on the insulator, has high trimming efficiency and high precision, and can effectively prevent the porcelain insulator green body from generating fine cracks in the trimming process.

Description

Inner cavity trimming forming device for large-size insulator
Technical Field
The invention relates to the field of processing equipment of porcelain insulators, in particular to an inner cavity trimming and forming device of a large-size insulator.
Background
The porcelain insulator is used as an insulating loading part of an electric element, and is sintered and formed by taking high siliceous, high alkaline and high alumina clay as a main raw material through grouting, extrusion, static pressure and other forming processes, and has the characteristics of high mechanical strength, excellent electrical performance, low shrinkage, flame retardance, arc resistance and high tracking resistance. Along with development of electrical technology, the loading capacity requirement on electrical equipment in the field is higher and higher, and the traditional porcelain insulator has the defects of lower mechanical strength, insufficient electrical insulation performance, low bearing mechanical pressure and the like due to smaller size and thinner wall thickness, so that the market requirement of the large-size high-voltage porcelain insulator is higher and higher.
Compared with the common small-size insulator, the large-size insulator with the outer diameter larger than 480mm and the height larger than 900mm has better mechanical strength and electrical insulation performance due to the size structural characteristics, and can meet more severe use requirements. However, the large-size insulator has the defect of high molding difficulty, so that the blank usually leaves 5-6 mm of allowance on the outer surface and the inner cavity surface of the insulator during molding, and then secondary blank repairing operation is performed on the molded insulator blank allowance position to improve the assembly performance and the insulating sealing performance of the molded porcelain insulator so as to meet the use requirement, wherein the blank repairing operation on the inner cavity of the insulator blank is included.
In the prior art, machining equipment special for repairing the inner wall of a porcelain insulator green body is not available, and milling is mostly carried out by directly utilizing a milling cutter, so that the machining process is time-consuming and labor-consuming when the milling cutter is adopted for machining due to the structural characteristics of the circular inner wall of the porcelain insulator, and the working efficiency is lower when the feeding is too shallow; the structural defect is easy to occur when the cutter is fed too deeply, and in addition, the inner wall of the ceramic insulator green body after milling needs to be polished independently to ensure the machining precision; meanwhile, due to the material characteristics of the porcelain insulator, when the traditional milling machine is used for matching with the milling cutter to repair the inner cavity of the porcelain insulator green body, the traditional milling cutter is easy to generate fine cracks at the front part of the front extension section of the milling cutter feeding area, and the fine cracks can negatively influence the dielectric strength and the mechanical strength of the finally formed insulator product; and stress damage phenomenon is easy to occur due to the expansion of the fine cracks caused by excessive pretightening force in the process of packaging the insulator; in addition, the insulator blank with fine cracks is easy to sinter and form, so that the performance of the formed insulator is reduced in the continuous use process due to the accumulation of electromagnetic damage and continuous thermal stress impact, and the integral mechanical strength, the sealing performance and the electrical performance of the insulator are also affected when the insulator is serious, so that the insulator cannot bear various external pressures, tensile forces and torsion to burst and fail after being used for a period of time.
Disclosure of Invention
The invention provides an inner cavity blank repairing and forming device for a large-size insulator, which can be used for carrying out inner cavity blank repairing operation on a blank structural member after insulator sintering, is particularly suitable for the blank structural member of the large-size insulator, and can be used for solving the defects in the technical background.
The technical problems solved by the invention are realized by adopting the following technical scheme:
an inner cavity trimming forming device of a large-size insulator comprises a frame and a trimming device arranged on one side of the frame;
the stand is provided with a rotary table, the rotary table is provided with a rotary seat, and the rotary seat is a vertical rotary seat and is used for vertically placing the insulator and keeping the position fixed;
the blank repairing device is arranged at the top of one side of the frame and comprises a main rod body and an auxiliary rod body, wherein the main rod body can extend into the inner cavity of the insulator from the top of the insulator, the main rod body passes through the axis of the insulator, and the auxiliary rod body is eccentrically arranged at one side of the main rod body; the main rod body and the auxiliary rod body can axially feed or withdraw along the insulator, and the main rod body and the auxiliary rod body are driven to rotate through a rotating shaft of an external motor;
the end part of the main rod body is provided with a main trimming cutter which is of a three-section structure and comprises a ball head polishing part and a round cutter disc arranged at the rear part of the ball head polishing part, a trimming cutter head is detachably arranged on the outer disc surface of the round cutter disc, the rear part of the round cutter disc is provided with a disc trimming cutter, the disc trimming cutter comprises a cylindrical cutter body concentrically assembled on the main rod body, and a plurality of cutting edges are formed on the outer cylindrical surface of the cylindrical cutter body;
the end part of the auxiliary rod body is provided with a cylindrical polishing rod; the cylindrical polishing rod in the processing state has a polishing surface which is attached to the surface of the inner cavity of the insulator after being processed by the main trimming cutter.
As a further limitation, the swivel mount is a detachable assembly structure arranged on the turntable, and an assembly centering structure is arranged between the swivel mount and the turntable;
the assembly centering structure comprises a conical seat and a conical table which are matched, wherein a plurality of tooth-shaped ribs which are used for being matched and meshed are formed on the outer cylindrical surface of the conical table and the inner cylindrical surface of the conical seat, and the tooth-shaped ribs are used for transmitting torque when the rotary table rotates.
By way of further limitation, the swivel mount has a placement seat that mates with the insulator.
As further limitation, a stand is arranged on one side of the turntable of the frame, the blank repairing device is assembled at the top of the stand through a blank repairing device swivel mount, and the work position and the standby position of the blank repairing device are converted through the blank repairing device swivel mount;
the stand is provided with a lifting part, and the length of the stand can be adjusted through the lifting action of the lifting part.
As a further definition, the distance between the auxiliary rod body and the main rod body is adjustable.
As a further limitation, the main trimming cutter is integrally assembled on the main trimming cutter seat, and is detachably assembled at the end part of the main rod body through the main trimming cutter seat.
As a further definition, in the primary trimming tool:
the maximum diameter of the ball head polishing part is 3-5 mm smaller than the calibrated cavity diameter of the inner cavity of the insulator;
the diameter of the excircle of the corresponding blade part of the blank repairing cutter head on the circular cutter head is 0.8-1.2 mm smaller than the diameter of the calibrating cavity of the inner cavity of the insulator in the rotating process;
the external cylindrical surface corresponding to the upper cutting edge surface of the disc-shaped blank repairing cutter in the rotating process is 0.3-0.5 mm smaller than the calibrated cavity diameter of the inner cavity of the insulator.
As further limitation, the upper cutting edge surfaces of the disc-shaped trimming cutter are a plurality of spiral edge surfaces which are arranged in parallel at intervals, and the rotation direction of the spiral edge surfaces is consistent with the feeding rotation direction of the main trimming cutter; the same spiral cutting face is broken into a plurality of sections by a first type of spacing groove perpendicular to the spiral cutting face in the rotation direction, a second type of spacing groove is arranged between the adjacent spiral cutting faces, and the first type of spacing groove and the second type of spacing groove form chip removal grooves together.
As a further limitation, the cylindrical sanding rod is a detachable assembly structure at the end of the auxiliary rod body.
As a further limitation, the polishing surface of the ball head polishing part is a rough surface formed by hard materials; and the polishing surface of the cylindrical polishing rod is a suede surface.
As a further limitation, the cylindrical polishing rod is arranged on one side of the upper part of the main blank repairing cutter through the auxiliary rod body, and is synchronously telescopic and fed with the main blank repairing cutter on the main rod body through the auxiliary rod body, and the telescopic feeding rates of the main rod body and the auxiliary rod body are consistent.
The beneficial effects are that: the inner cavity trimming forming device for the large-size insulator is compact in structure and high in operation efficiency, can finish trimming and polishing operations on the inner cavity of the insulator at the same time in one operation cycle, is particularly suitable for trimming the inner cavity of the insulator with a larger size, is high in trimming precision and good in trimming continuity on insulator green bodies, can effectively avoid the problems that fine cracks are easy to generate and the trimming efficiency is low when a single milling cutter performs trimming operation on the insulator green bodies, and can meet the processing requirements on porcelain insulators under different process conditions.
Drawings
FIG. 1 is a schematic diagram of a preferred embodiment of the present invention.
Fig. 2 is a structural style diagram of the main trimming cutter in the inner cavity of the insulator in fig. 1.
Fig. 3 is an enlarged schematic view of the structure of the portion a in fig. 2.
Fig. 4 is a schematic structural view of a disc-shaped trimming cutter.
Wherein: 1. a turntable; 2. rotating base; 3. insulator green body; 4. a main blank repairing cutter; 5. a cylindrical polishing rod; 6. a main rod body; 7. an auxiliary rod body; 8. a driving motor; 9. a dual output gearbox; 10. rotating base of blank repairing device; 11. rotating the rotating shaft; 12. a swivel mount assembly rack; 13. a vertical frame; 14. placing an inner hole of the seat; 15. a cone seat; 16. tooth-shaped ribs; 401. a ball polishing part; 402. trimming a blank cutter head; 403. a circular cutterhead; 404. disc-shaped blank trimming knife.
Detailed Description
The invention is further described with reference to the following detailed drawings in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the implementation of the invention easy to understand.
It is noted that the embodiments of the present invention in the specification and claims of the invention and the above-described drawings can be implemented in a sequence other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements explicitly listed.
In addition, the embodiments presented in the context of this detailed description are only one of the embodiments that the invention may exhibit, and represent all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
Referring to the preferred embodiment of the inner cavity trimming forming device of the large-size insulator in fig. 1-4, in this embodiment, the trimming forming device can be used for inner cavity trimming treatment of large-size high-voltage ceramic insulator green bodies with outer diameter sizes of 400-770mm and heights of 700-1800mm and ceramic wall thicknesses of 50-250 mm.
The trimming forming device comprises a frame, wherein the frame is provided with a base used for fixing the device on the horizontal ground, and the fixing mode of the base and the horizontal ground can be one of foundation bolts, pre-buried bases and pouring bases; and under the condition of large dead weight of the equipment, the equipment can be directly placed on the surface of the ground after leveling under the condition of providing stability through the dead weight of the equipment.
In the embodiment, a turntable 1 is arranged on a base of a stand, the turntable 1 is driven to rotate by a built-in motor arranged in the base, a concave frustum with an inverted trapezoid cross section is arranged on the turntable 1, and tooth grooves arranged at intervals are formed on the conical surface of the frustum; the axis of the frustum passes through the axis of the turntable 1, the frustum is used for placing a conical seat 15 matched with the size and shape of the frustum, and the conical seat 15 is provided with an inverted trapezoid protruding part matched with the inverted trapezoid section, and the conical surface corresponding to the protruding part is provided with a tooth-shaped rib 16 matched with the tooth-shaped groove.
The cooperation of corresponding conical surfaces on the rotary table 1 and the rotary table 15 is used for realizing centering treatment when the rotary table 15 is placed on the rotary table 1, and the tooth-shaped grooves are matched and meshed with the tooth-shaped ribs 16, so that torque on the rotary table 1 is transmitted to the rotary table 15, and the purposes of driving the rotary table 15 and rotating the insulator 3 placed on the rotary table 15 through the rotary table 1 are realized.
In the embodiment, the rotary seat 15 is used as a placing tool of the insulator green body 3, a tray is arranged at the upper part of the rotary seat, and a placing seat matched with the size of the insulator green body 3 is formed on the surface of the tray; for convenience of operation, the rotary seat 15 can also be directly used as a forming platform of the insulator green body 3, and the insulator green body 3 is directly formed on the surface of the rotary seat 15 in the compacting process stage. The swivel base 15 is of a detachable assembly structure on the turntable 1, so that the swivel base 15 can be used as an accessory consumable to enable a single device to adapt to a plurality of swivel bases 15 for circulation operation; during operation, the corresponding insulator green body 3 is directly hoisted at the concave frustum position of the turntable 1 together with the rotary seat 15 in a hoisting mode after forming, and is kept standing and fixed after centering is finished.
While in different embodiments the swivel mount 15 has different tray sizes in the upper part to fit different sizes of insulator green bodies 3.
The right side of frame is provided with riser 13, and is equipped with the elevating seat in this riser 13, and is provided with swivel mount assembly jig 12 at the top of elevating seat, and the device is equipped with blank repairing device swivel mount 10 through swivel mount pivot 11 on swivel mount assembly jig 12 to be equipped with blank repairing device at the outer end of blank repairing device swivel mount 10.
The blank repairing device comprises a driving motor 8 serving as power equipment and a double-output gearbox 9, wherein two output shafts of the double-output gearbox 9 are respectively provided with a main rod body 6 and an auxiliary rod body 7:
the corresponding main rod body 6 is detachably provided with a main trimming cutter holder at the tail end, and is provided with a main trimming cutter 4 through the main trimming cutter holder, wherein the main trimming cutter holder is of a threaded sleeve column structure and is sleeved on the top surface of the main rod body 6 in a screwing mode, and the main trimming cutter 4 has a structural style as shown in fig. 2 and comprises a disc trimming cutter 404, a circular cutter disc 403 and a ball head polishing part 401 which are sequentially assembled on the main trimming cutter holder.
In this embodiment, the surface of the ball grinding part 401 is a grinding surface, which is made of high wear-resistant alloy material and is formed by powder metallurgy, and rough grains are formed on the surface of the grinding surface; the maximum diameter of the base part of the bulb polishing part 401 is 3-5 mm smaller than the nominal cavity diameter of the inner cavity of the insulator green body 3. The outer circular surface of the circular cutter 403 is provided with a cutter head assembling part, a plurality of blank repairing cutter heads 402 are assembled through the cutter head assembling part, the blank repairing cutter heads 402 are identical in model size, and the diameter of an outline circle generated by rotation of the blank repairing cutter heads 402 is 0.8-1.2 mm smaller than the nominal cavity diameter of the inner cavity of the insulator in the process of driving the main rod body 6 to rotate after the assembly is completed. The structural style of the disc-shaped trimming cutter 404 is shown in fig. 4, and the disc-shaped trimming cutter comprises a cutter body, wherein the cutter body is a cylinder similar to a hob structure, a plurality of cutting edges are formed on the outer cylindrical surface of the cylinder, the cutting edges are a plurality of spiral cutting edges which are arranged in parallel at intervals, the rotation direction of the spiral cutting edges is consistent with the feeding rotation direction of the main trimming cutter, and the corresponding outer cylindrical surface of the cutting edges in the rotation process is 0.3-0.5 mm smaller than the nominal cavity diameter of the inner cavity of the insulator green body 3; in addition, among the spiral blade faces arranged on the outer cylindrical surface of the disc-shaped blank trimming cutter 404, the same spiral blade face is broken into a plurality of sections by a first type of spacing groove perpendicular to the spiral direction of the spiral blade face, and a second type of spacing groove is arranged between the adjacent spiral blade faces, and the first type of spacing groove and the second type of spacing groove form a chip removing groove of the main blank trimming cutter together.
The interval between the auxiliary rod body 7 and the main rod body 6 of this embodiment is adjustable, and its adjustment mode is the microspur motor, and auxiliary rod body 7 is equipped with cylindricality at the tip and polishes excellent 5, and this cylindricality is polished excellent 5 eccentric settings in one side upper portion of main repair base cutter 4, and cylindricality is polished excellent 5 and is included the barred body, flocking on the outer cylinder of its barred body to regard as the face of polishing of cylindricality polishing excellent 5 with the matte after the flocking.
In the embodiment, the main trimming tool apron is of an integrally replaceable structure, and the trimming requirements of insulator green bodies 3 with different sizes can be adapted by integrally replacing the corresponding main trimming tool apron; the cylindrical sanding rod 5 is also of a detachable assembly at the end of the auxiliary rod body 7 for replacement when the sanding surface wears to a critical value.
The trimming device of this embodiment needs to carry out the precision calibration before using, and the center of the main rod body 6 that needs to be guaranteed in the precision calibration process keeps the coincidence with the center of insulator unburned bricks 3, after accomplishing the calibration, the device can carry out trimming operation, carries out according to following order during the operation:
firstly, turning a blank repairing device on the device to a standby position through a blank repairing device swivel base 10 with a swivel base rotating shaft 11, then hoisting an insulator green body 3 together with a swivel base 2 to a rotary table 1 and completing alignment assembly, then lifting an opposite frame 13, rotating the blank repairing device to a working position through the blank repairing device swivel base 10 with the swivel base rotating shaft 11, keeping the axis of a main rod body 5 coincident with the axis of the insulator green body 3 in the working position state, and enabling the surface of a cylindrical polishing rod 5 to be abutted against the inner wall surface of the insulator green body 3.
The main rod body 5 and the auxiliary rod body 7 of the blank repairing device extend into the inner cavity of the insulator green body 3 from the upper part, meanwhile, the rotary table 1, the main rod body 6 and the auxiliary rod body 7 are driven to rotate (the rotary table 1 and the main rod body 6 rotate in opposite directions), in the working state of the device, the rotary table 1, the main rod body 6 and the auxiliary rod body 7 keep continuously rotating, and meanwhile, the blank repairing device continuously feeds through the lifting of the stand 13 and/or the expansion and contraction of the main rod body 6 and the auxiliary rod body 7; until the main trimming cutter 4 enters the inner hole 14 of the placement seat reserved in the central position of the rotary seat 2, completing the full-section trimming operation of the inner cavity of the insulator green body 3, then withdrawing the main trimming cutter 4 from the inner cavity of the insulator green body 3 through the main rod body 6, withdrawing the cylindrical polishing rod 5 from the inner cavity of the insulator green body 3 through the auxiliary rod body 7; turning the rotary seat 10 of the trimming device away from the standby position, completing a trimming processing cycle, and hoisting the corresponding insulator green body 3 and the rotary seat 2 to the next working procedure for treatment after the processing cycle is completed; the device proceeds to the next trimming cycle.
In the feeding process of the trimming device of the embodiment, the main trimming cutter 4 can perform three-stage trimming treatment on the inner cavity of the insulator green body 3 in a pattern shown in fig. 3, firstly, the bulb polishing part 401 is used for matching the machining allowance of the inner cavity position of the insulator green body 3, the inner cavity surface is compacted and leveled, then, the trimming cutter 402 is used for performing first trimming on the inner cavity surface of the insulator green body 3 in the compacted state, and the disc trimming cutter 404 is used for performing second trimming. The twice trimming operation can effectively improve the trimming precision of the inner cavity of the insulator green body 3; meanwhile, in the first trimming process by using the trimming cutter head 402, the trimmed scraps are discharged through the chip grooves of the disc-shaped trimming cutter 404, and in the discharging process, the spiral edge part of the disc-shaped trimming cutter 404 is abutted against the inner cavity surface of the insulator green body 3, and the trimming scraps produced in the first trimming process are flexibly extruded on the inner cavity surface of the insulator green body 3 in the abutting process, so that the small-sized flexible extrusion can greatly reduce the fine cracks generated in the trimming process of the trimming cutter head 402, and has a certain repairing effect on the small amount of generated fine cracks.
And the area after the operation of the main trimming cutter 4 is finished is abutted against the inner cavity surface of the insulator green body 3 through a cylindrical polishing rod 5 so as to polish and polish the inner cavity surface of the insulator green body 3 treated by the main trimming cutter to obtain a smooth surface, and further repairing cracks so as to obtain the inner cavity of the insulator green body 3 after trimming and forming.
When the device of the embodiment is used for processing the high-voltage ceramic insulator with the alumina content of 90.0-99.0% (the green body is molded by adopting a static and isostatic process, and the molding pressure is 150 Mpa), the treated green body has the performance indexes of bending strength of more than or equal to 290Mpa, compressive strength of more than or equal to 1200Mpa, lightning impulse voltage of more than or equal to 20kV/mm and mechanical bearing resistance of more than or equal to 1000 tons after sintering. And the performance index is used continuously for more than 6 months/2 years, and the performance loss rate is not more than 3%/5%.
The operation process is completed once, so that the trimming processing efficiency and effect on the inner cavity of the insulator green body 3 can be effectively improved. In other embodiments, a trimming device for trimming the outer surface of the porcelain insulator green body 3 can be assembled on the inner side of the vertical frame 13, so that the purposes of trimming the inner cavity and the outer wall of the insulator green body 3 on the same device are achieved, and the number of devices, the input cost and the space occupation are reduced; therefore, the method also has better application value.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. The inner cavity trimming and forming device for the large-size insulator is characterized by comprising a frame and a trimming device arranged on one side of the frame;
the stand is provided with a rotary table, the rotary table is provided with a rotary seat, and the rotary seat is a vertical rotary seat and is used for vertically placing the insulator and keeping the position fixed;
the blank repairing device is arranged at the top of one side of the frame and comprises a main rod body and an auxiliary rod body, wherein the main rod body can extend into the inner cavity of the insulator from the top of the insulator, the main rod body passes through the axis of the insulator, and the auxiliary rod body is eccentrically arranged at one side of the main rod body; the main rod body and the auxiliary rod body can axially feed or withdraw along the insulator, and the main rod body and the auxiliary rod body are driven to rotate through a rotating shaft of an external motor;
the end part of the main rod body is provided with a main trimming cutter which is of a three-section structure and comprises a ball head polishing part and a round cutter disc arranged at the rear part of the ball head polishing part, a trimming cutter head is detachably arranged on the outer disc surface of the round cutter disc, the rear part of the round cutter disc is provided with a disc trimming cutter, the disc trimming cutter comprises a cylindrical cutter body concentrically assembled on the main rod body, and a plurality of cutting edges are formed on the outer cylindrical surface of the cylindrical cutter body;
the end part of the auxiliary rod body is provided with a cylindrical polishing rod; the cylindrical polishing rod in the processing state has a polishing surface which is attached to the surface of the inner cavity of the insulator after being processed by the main trimming cutter.
2. The device for trimming and forming the inner cavity of the large-sized insulator according to claim 1, wherein the swivel base is a detachable assembly structure arranged on the turntable, and an assembly centering structure is arranged between the swivel base and the turntable.
3. The device for trimming and forming the inner cavity of the large-sized insulator according to claim 2, wherein the assembly centering structure comprises a cone seat and a cone table which are matched, a plurality of tooth-shaped ribs for matching engagement are formed on the outer cylindrical surface of the cone table and the inner cylindrical surface of the cone seat, and the tooth-shaped ribs are used for transmitting torque when the turntable rotates.
4. The cavity trimming and shaping device for large-sized insulators according to claim 1, wherein the swivel base is provided with a placement seat matched with the insulator.
5. The device for shaping the inner cavity trimming of the large-size insulator according to claim 1, wherein the stand is provided with a vertical frame at one side of the turntable, the trimming device is assembled at the top of the vertical frame through a trimming device swivel mount, and the switching between the working position and the waiting position of the trimming device is realized through the trimming device swivel mount.
6. The apparatus for trimming and forming a cavity of a large-sized insulator as claimed in claim 5, wherein the stand has a lifting portion, and a length of the stand is adjustable by a lifting operation of the lifting portion.
7. The device for trimming and forming the inner cavity of the large-sized insulator according to claim 1, wherein the distance between the auxiliary rod body and the main rod body is adjustable.
8. The device for forming a cavity-shaped trimming of a large-sized insulator as set forth in claim 1, wherein said main trimming cutter is integrally assembled to said main trimming cutter holder and detachably assembled to said main rod body end portion via said main trimming cutter holder.
9. The internal cavity trimming and forming device for large-sized insulators according to claim 1, wherein in said main trimming cutter:
the maximum diameter of the ball head polishing part is 3-5 mm smaller than the calibrated cavity diameter of the inner cavity of the insulator;
the diameter of the excircle of the corresponding blade part of the blank repairing cutter head on the circular cutter head is 0.8-1.2 mm smaller than the diameter of the calibrating cavity of the inner cavity of the insulator in the rotating process;
the external cylindrical surface corresponding to the upper cutting edge surface of the disc-shaped blank repairing cutter in the rotating process is 0.3-0.5 mm smaller than the calibrated cavity diameter of the inner cavity of the insulator.
10. The inner cavity trimming forming device of the large-size insulator according to claim 1, wherein the upper cutting edge surfaces of the disc-shaped trimming cutter are a plurality of spiral edge surfaces which are arranged in parallel at intervals, and the rotation direction of the spiral edge surfaces is consistent with the feeding rotation direction of the main trimming cutter; the same spiral cutting face is broken into a plurality of sections by a first type of spacing groove perpendicular to the spiral cutting face in the rotation direction, a second type of spacing groove is arranged between the adjacent spiral cutting faces, and the first type of spacing groove and the second type of spacing groove form chip removal grooves together.
CN202310524973.4A 2023-05-11 2023-05-11 Inner cavity trimming forming device for large-size insulator Pending CN116373088A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310524973.4A CN116373088A (en) 2023-05-11 2023-05-11 Inner cavity trimming forming device for large-size insulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310524973.4A CN116373088A (en) 2023-05-11 2023-05-11 Inner cavity trimming forming device for large-size insulator

Publications (1)

Publication Number Publication Date
CN116373088A true CN116373088A (en) 2023-07-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310524973.4A Pending CN116373088A (en) 2023-05-11 2023-05-11 Inner cavity trimming forming device for large-size insulator

Country Status (1)

Country Link
CN (1) CN116373088A (en)

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