Three-post insulator high-precision grinding machining equipment and machining method

Abstract

The invention discloses three-post insulator high-precision grinding machining equipment and a machining method, and relates to the technical field of insulator grinding machining equipment.The three-post insulator high-precision grinding machining equipment comprises a numerical control machining center and a measuring head, and the measuring head is installed on the numerical control machining center and is in communication connection with a control system of the numerical control machining center; the clamping assembly comprises a roll-over stand mechanism, a bridge plate and an insulator supporting leg clamping mechanism; the roll-over stand mechanism is installed on a workbench of the numerical control machining center. An overturning driving end of the overturning frame mechanism is in transmission connection with the bridge plate to drive the bridge plate to overturn; the plate surface of the bridge plate is provided with an avoiding through hole group for avoiding three supporting columns of the three-supporting-column insulator; and the insulator supporting leg clamping mechanism is mounted on the plate surface of the bridge plate and is arranged corresponding to the peripheral side of the avoiding through hole group. Three-post insulators of different sizes can be clamped and machined, machining of three posts of the three-post insulator can be completed through one-time clamping, then the grinding machining precision is ensured, and the three-post insulator grinding and machining device has the advantages of being high in operation efficiency and small in dust pollution.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of insulator grinding equipment, in particular to a three-column insulator high-precision grinding equipment and a processing method. BACKGROUND

[0002] In high-voltage switch equipment, the three-column insulator is one of the key components, and its processing precision and surface quality directly affect the insulation performance and operation reliability of the equipment. Due to the special structure of the root surface layer resin of the cylinder that needs to be processed and removed, it is currently not possible to achieve stress layer root removal, cylinder root resin burr removal, and complex edge smoothing transition operations at the center cylinder by machining; at present, it completely relies on manual angle grinder operation, and there are problems such as misoperation of the cylinder, difficulty in quality control, low consistency, and difficulty in meeting the high-standard surface roughness and flatness requirements. In addition, the dust pollution is serious during the grinding process of the epoxy resin material, the working environment is poor, and the health of personnel is harmed, and the working condition environment needs to be improved.

[0003] The existing high-voltage insulator grinding equipment can be used to solve the grinding problem of insulators of different sizes in rod or column shape, but cannot solve the grinding problem of special-shaped three-column insulators. The existing related equipment can only grind one column of the three-column insulator at a time, and manual repositioning is required each time, which has problems such as low processing efficiency, inability to realize synchronous processing of multiple columns, and complex operation.

[0004] Therefore, how to design a three-column insulator high-precision grinding equipment and a processing method can clamp and process three-column insulators of different sizes, and complete the processing of the three columns of the three-column insulator at a time, thereby ensuring the grinding precision, and having the characteristics of high working efficiency and small dust pollution is a problem that needs to be solved by those skilled in the art. SUMMARY

[0005] Therefore, the present application provides a three-column insulator high-precision grinding equipment and a processing method, which aims to solve the technical problem that the traditional insulator grinding equipment cannot complete the processing of the three columns of the three-column insulator at a time.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0007] The present application provides a three-column insulator high-precision grinding equipment, which comprises:

[0008] A numerical control machining center,

[0009] A measuring head installed on the numerical control machining center and communicatively connected to the control system of the numerical control machining center;

[0010] The clamping assembly comprises a turnover frame mechanism, a bridge plate and an insulator leg clamping mechanism; the turnover frame mechanism is installed on the workbench of the numerical control machining center; the turnover driving end of the turnover frame mechanism is in transmission connection with the bridge plate to drive the turnover of the bridge plate;

[0011] A set of avoiding through holes for avoiding three pillars of the three-pillar insulator are formed on the plate surface of the bridge plate; the insulator leg clamping mechanism is installed on the plate surface of the bridge plate and is arranged on the outer circumferential side of the set of avoiding through holes.

[0012] When the three-pillar insulator high-precision grinding machining equipment is used, the three-pillar insulator is installed on one side of the plate surface of the bridge plate, and the legs of the three-pillar insulator are clamped by the insulator leg clamping mechanism; at this time, one end of the three pillars of the three-pillar insulator corresponds to one side of the bridge plate, and the other end of the three pillars extends through the set of avoiding through holes and corresponds to the other side of the bridge plate; the turnover of the bridge plate is controlled by the turnover frame mechanism, and thus the two ends of the three pillars can correspond to the polishing tool of the numerical control machining center, and thus the machining of the two ends of the three pillars of the three-pillar insulator can be completed at one time; the bridge plate with the set of avoiding through holes and capable of being turned over by 180 degrees enables the other end of the three pillars to be touched and machined by the polishing tool; the probe is used to measure the three pillars of the three-pillar insulator before machining, and thus a machining coordinate system is established; the control system of the numerical control machining center can automatically adjust the machining path according to the measurement result, and thus the machining accuracy is ensured. The three-pillar insulator of different sizes can be clamped and machined by the three-pillar insulator high-precision grinding machining equipment, and the machining of the three pillars of the three-pillar insulator can be completed at one time, and thus the polishing machining accuracy is ensured, and the work efficiency is high.

[0013] As a further improvement of the above technical solution, the turnover frame mechanism comprises a bottom plate, a rotary table mechanism and a tailstock; the bottom plate is installed in parallel on the workbench surface of the numerical control machining center; the rotary table mechanism and the tailstock are both installed on the plate surface of the bottom plate away from the workbench; the rotary table mechanism and the tailstock are arranged in opposite directions parallel to the plate surface of the bottom plate; the bridge plate is located between the rotary table mechanism and the tailstock; one end of the bridge plate is rotatably connected to the tailstock; the rotary driving end of the rotary table mechanism is in transmission connection with the other end of the bridge plate, and the rotary table mechanism can drive the bridge plate to turn over around the rotation axis parallel to the opposite direction of the rotary table mechanism and the tailstock.

[0014] The beneficial effects of the above technical solution are that the bottom plate is used to quickly assemble the rotary table mechanism and the tailstock on the workbench surface; the rotary table mechanism is used to control the turnover and positioning of the bridge plate; and the tailstock is used to support the bridge plate in cooperation with the rotary table mechanism.

[0015] As a further improvement of the above technical solution, the set of avoiding through holes comprises avoiding through hole one, avoiding through hole two and avoiding through hole three;

[0016] The first avoiding through hole and the second avoiding through hole are arranged along the length direction of the bridge plate and correspond to the middle part of the width direction of the bridge plate; and the third avoiding through hole is located at one side of the width direction of the bridge plate and corresponds to the space between the first avoiding through hole and the second avoiding through hole.

[0017] The beneficial effects of the above technical solution are that the first avoiding through hole, the second avoiding through hole and the third avoiding through hole can be adapted to the through arrangement of the one end of the three pillars of the three-pillar insulator, and provide a polishing space for polishing the through end of the three pillars of the three-pillar insulator.

[0018] As a further improvement of the above technical solution, the insulator leg clamping mechanism comprises a V-shaped positioning block, a first clamping oil cylinder, a first connecting plate, a flexible clamping arm, a second clamping oil cylinder, a second connecting plate and a flexible clamping arm; the V-shaped positioning block, the first clamping oil cylinder and the second clamping oil cylinder are all installed on the side surface of the bridge plate away from the workbench; the first clamping oil cylinder and the second clamping oil cylinder are symmetrically arranged at the two ends of the V-shaped positioning block; the telescopic rods of the first clamping oil cylinder and the second clamping oil cylinder are both perpendicular to the bridge plate surface;

[0019] one end of the first connecting plate is hingedly connected to the upper part of one end of the cylinder body of the first clamping oil cylinder close to the second clamping oil cylinder; one end of the flexible clamping arm is hingedly connected to the telescopic rod of the first clamping oil cylinder, and the middle part of the flexible clamping arm is hingedly connected to the other end of the first connecting plate; the telescopic rod of the first clamping oil cylinder can drive the flexible clamping arm to turn to close to or away from the V-shaped opening of the V-shaped positioning block;

[0020] one end of the second connecting plate is hingedly connected to the upper part of one end of the cylinder body of the second clamping oil cylinder close to the first clamping oil cylinder; one end of the flexible clamping arm is hingedly connected to the telescopic rod of the second clamping oil cylinder, and the middle part of the flexible clamping arm is hingedly connected to the other end of the second connecting plate; the telescopic rod of the second clamping oil cylinder can drive the flexible clamping arm to turn to close to or away from the V-shaped opening of the V-shaped positioning block.

[0021] The beneficial effects of the above technical solution are that when clamping the three-pillar insulator, the legs of the three-pillar insulator are placed in the V-shaped opening of the V-shaped positioning block for positioning; the first clamping oil cylinder drives the flexible clamping arm to press and clamp the legs of the three-pillar insulator, and the second clamping oil cylinder drives the flexible clamping arm to press and clamp the legs of the three-pillar insulator, so that the legs of the three-pillar insulator are stably clamped in the V-shaped positioning block; under the hinged guiding action of the first connecting plate and the second connecting plate, the corresponding flexible clamping arm and the flexible clamping arm have a larger clamping space, which can adapt to high-precision clamping of the legs of three-pillar insulators of different sizes.

[0022] As a further improvement of the above technical solution, the insulator leg clamping mechanism is multiple; the insulator leg clamping mechanism is arranged on both sides of the length direction of the bridge plate corresponding to the three avoiding through holes; the insulator leg clamping mechanism is arranged on the side away from the three avoiding through holes of the avoiding through hole one and the avoiding through hole two.

[0023] The beneficial effect of the above technical solution is that multiple insulator leg clamping mechanisms correspond to the multiple legs of the three-pillar insulator, forming a more stable clamping structure and effectively improving the machining precision.

[0024] As a further improvement of the above technical solution, the inner peripheral wall of the avoiding through hole one, the avoiding through hole two and the avoiding through hole three has a polishing tool avoiding space between the outer peripheral wall of the corresponding three-pillar insulator inserted therein.

[0025] The inner side wall of the avoiding through hole three is opened away from the avoiding through hole one and the avoiding through hole two to form a gate position polishing avoiding opening.

[0026] The beneficial effect of the above technical solution is that by setting the polishing tool avoiding space in the avoiding through hole one, the avoiding through hole two and the avoiding through hole three, an operation space is provided for the polishing tool to enter the avoiding through hole and effectively polish the three pillars of the three-pillar insulator; the gate position polishing avoiding opening formed by opening one side of the avoiding through hole three provides a polishing tool avoiding space for the gate position polishing of the three-pillar insulator, so that all polishing processes can be completed at once clamping, significantly improving the operation efficiency.

[0027] As a further improvement of the above technical solution, it further comprises an ultrasonic machining auxiliary device, which is installed on the numerical control machining center main shaft and used to drive the polishing tool to vibrate.

[0028] The beneficial effect of the above technical solution is that the ultrasonic machining auxiliary device can reduce the polishing cutting force and thermal influence, improve the machining efficiency and surface quality.

[0029] As a further improvement of the above technical solution, it further comprises a dust treatment device, which is installed on the numerical control machining center base and arranged above the bridge plate corresponding to the dust suction port, used to suck the dust or debris generated by the polishing operation.

[0030] The beneficial effect of the above technical solution is that the dust treatment device can timely remove the dust and debris generated during the machining process; by arranging the dust suction port near the main shaft, the cleanliness of the machining area can be ensured, the influence of dust on the machining precision is reduced, the working environment is improved, and the health of the operator is protected.

[0031] As a further improvement of the above technical solution, the compressed air cooling system is arranged corresponding to the polishing tool on the spindle of the numerical control machining center, so as to cool the polishing tool by blowing air.

[0032] Another aspect of the present application provides a high-precision grinding processing method for a three-strut insulator, which uses the high-precision grinding processing device for a three-strut insulator, and includes the following steps:

[0033] Step one: insert the three struts of the three-strut insulator into the set of avoiding through holes of the bridge plate, and clamp the legs of the three-strut insulator by using the insulator leg clamping mechanism, so as to clamp and fasten the three-strut insulator on the bridge plate;

[0034] Step two: control the bridge plate to flip and position by using the flipping frame mechanism, measure the three-strut insulator by using the measuring head, and then establish a processing coordinate system; make the one side of the bridge plate correspond to and be perpendicular to the spindle of the numerical control machining center, control the movement of the polishing tool by using the numerical control machining center, and then polish and process one end of the three struts of the three-strut insulator;

[0035] Step three: control the bridge plate to flip and position by using the flipping frame mechanism, so as to make the other side of the bridge plate correspond to and be perpendicular to the spindle of the numerical control machining center, control the movement of the polishing tool by using the numerical control machining center, and then polish and process the other end of the three struts of the three-strut insulator.

[0036] According to the above technical solution, compared with the prior art, the present application provides a high-precision grinding processing device and method for a three-strut insulator, which has the following advantages and beneficial effects:

[0037] 1. The present application is based on a numerical control machining center, has high-precision X, Y and Z axis movement control, and the positioning accuracy is within 10 microns, and the repeat positioning accuracy is within 10 microns; and through the integration of flexible clamps, multi-axis numerical control, ultrasonic grinding and intelligent detection systems, the three-strut insulator can be clamped once to complete the high-precision automatic processing of the three struts, the numerical control system can realize complex processing paths and high-precision processing requirements, not only improves the surface roughness to Ra≤1.6 microns and controls the flatness error within 0.2 mm, significantly improves the product consistency and insulation reliability, but also improves the working environment through the dust treatment device, greatly reduces the labor cost and quality risk, and comprehensively solves the core problems of low efficiency, poor precision and heavy pollution in traditional processing.

[0038] 2、The grinding machining equipment has automatic machining capability and multi-axis linkage function, can simultaneously process three supports of the three-support insulator, reduces manual intervention, and the multi-axis linkage function can also realize a complex machining path, ensures the machining precision and quality of each support; through the optimized machining path design, the machining of all supports can be completed under one clamping, the consistency, reliability and machining efficiency are improved. Through the integrated monitoring system, the machining state can be fed back in real time, intelligent control is realized, the machining efficiency can be improved, and the machining parameters can be automatically adjusted according to different machining requirements, and the machining quality is ensured.

[0039] 3、The present application can ensure the efficiency and quality of the machining process by optimizing the machining process. For example, spiral or contour path is used for grinding to avoid local stress concentration; the parameters such as cutting speed, feed speed and rotating speed are controlled to ensure the stability of the machining process and the surface quality. In addition, by pretreating the workpiece before machining (such as cleaning the surface, measuring the potential and conductivity, etc.), the reliability and efficiency of the machining can be further improved.

[0040] 4、The present application can integrate a wireless probe system for tracking to establish an accurate machining coordinate system. The probe can accurately measure the workpiece before machining, and automatically adjust the machining path according to the measurement results to ensure the accuracy of the machining. The probe system can also monitor the machining state of the workpiece in real time during the machining process, and timely find and correct the deviation to further improve the machining quality.

[0041] 5、The present application adopts ultrasonic assisted grinding technology to reduce cutting force and thermal influence through high frequency vibration, improve machining efficiency and surface quality. Ultrasonic assisted machining can effectively remove stress layer and resin burr, and reduce micro-cracks and surface defects in the machining process, further improve the mechanical properties and insulation performance of the insulator. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0043] Figure 1 The present application is a kind of three support insulator high-precision grinding machining equipment overall structure schematic diagram;

[0044] Figure 2 The present application is a kind of three support insulator high-precision grinding machining equipment clamping assembly side view;

[0045] Figure 3A three-pillar insulator high-precision grinding machining equipment clamping assembly perspective view;

[0046] Figure 4 A three-pillar insulator high-precision grinding machining equipment bridge plate and insulator leg clamping mechanism perspective view;

[0047] Figure 5 A three-pillar insulator high-precision grinding machining equipment bridge plate and insulator leg clamping mechanism side view;

[0048] Figure 6 A three-pillar insulator high-precision grinding machining equipment bridge plate and insulator leg clamping mechanism another angle side view;

[0049] Figure 7 A three-pillar insulator high-precision grinding machining equipment bridge plate and insulator leg clamping mechanism top view;

[0050] Figure 8 A three-pillar insulator high-precision grinding machining equipment three-pillar insulator structure top view;

[0051] In the figure: 1, numerical control machining center; 11, main shaft; 12, polishing tool; 13, workbench; 2, measuring head; 3, clamping assembly; 31, turnover frame mechanism; 311, bottom plate; 3111, heightening block; 312, rotary table mechanism; 3121, rotary drive end; 3122, mounting plate two; 313, tailstock; 3131, rotating shaft; 3132, mounting plate one; 32, bridge plate; 321, avoiding through hole group; 3211, avoiding through hole one; 3212, avoiding through hole two; 3213, avoiding through hole three; 3214, polishing tool avoiding space; 3215, sprue position polishing avoiding port; 33, insulator leg clamping mechanism; 331, V-shaped positioning block; 332, clamping oil cylinder one; 333, connecting plate one; 334, flexible clamping arm one; 335, clamping oil cylinder two; 336, connecting plate two; 337, flexible clamping arm two; 338, flexible pad block; 339, flexible protective sleeve; 4, ultrasonic machining auxiliary device; 5, dust treatment device; 51, dust suction port; 6, compressed air cooling system; 61, cold air outlet; 7, three-pillar insulator; 71, pillar; 72, leg; 73, sprue position protruding block. DETAILED DESCRIPTION

[0052] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0053] In the description of the present application, it needs to be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0054] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0055] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0056] According to the embodiment of the present application, as shown in Figures 1 to 8 A kind of three-pillar insulator high-precision grinding processing equipment, including numerical control machining center 1, measuring head 2 and clamping assembly 3.

[0057] Measuring head 2 is installed on numerical control machining center 1 and is connected with the control system of numerical control machining center 1 in communication.

[0058] Clamping assembly 3 includes turnover frame mechanism 31, bridge plate 32 and insulator leg clamping mechanism 33;Turnover frame mechanism 31 is installed on the workbench 13 of numerical control machining center 1;The turnover driving end of turnover frame mechanism 31 is transmissionally connected with bridge plate 32 to drive it to overturn.

[0059] Bridge plate 32 plate surface is provided with a group of avoiding through holes 321 for avoiding three pillars 71 of three-pillar insulator 7;Insulator leg clamping mechanism 33 is installed on the plate surface of bridge plate 32 and is arranged on the outer peripheral side corresponding to the group of avoiding through holes 321.

[0060] The high-precision grinding processing equipment for the three-column insulator of the embodiment is used, the three-column insulator 7 is installed on one side of the bridge plate 32, the legs 72 of the three-column insulator 7 are clamped by the insulator leg clamping mechanism 33, at this time, one end of the three columns 71 of the three-column insulator 7 corresponds to one side of the bridge plate 32, the other end of the three columns 71 penetrates through the avoidance hole group 321 and extends to the other side of the bridge plate 32 corresponding to the bridge plate 32; the bridge plate 32 is controlled to overturn by the turnover frame mechanism 31, and then the two ends of the three columns can correspond to the polishing tool of the numerical control machining center 1, and then the processing of the two ends of the three columns of the three-column insulator is completed once clamping; the bridge plate 32 with the avoidance hole group 321 and capable of 180-degree overturning makes the other end of the three columns also be touched and processed by the polishing tool, the measuring head 2 is used for measuring the three columns of the three-column insulator before processing, and then a processing coordinate system is established, and the control system of the numerical control machining center 1 can automatically adjust the processing path according to the measurement result, so as to ensure the accuracy of processing. The three-column insulator of different sizes can be clamped and processed, the processing of the three columns of the three-column insulator can be completed once clamping, the polishing processing precision is ensured, and the operation efficiency is high.

[0061] Specifically, the numerical control machining center 1 is a vertical numerical control machining center; the spindle 11 of the numerical control machining center 1 is provided with a polishing tool 12. The polishing tool 12 can be selected from a grinding head and a diamond brush.

[0062] Specifically, the measuring head 2 is a wireless probe; the measuring head 2 can be selected from a Renishaw probe.

[0063] In some embodiments, the turnover frame mechanism 31 includes a bottom plate 311, a rotary table mechanism 312 and a tailstock 313; the bottom plate 311 is installed in parallel on the table top of the numerical control machining center 1; the rotary table mechanism 312 and the tailstock 313 are both installed on one side of the bottom plate 311 away from the table 13; the rotary table mechanism 312 and the tailstock 313 are arranged in opposite directions along the parallel bottom plate 311; the bridge plate 32 is located between the rotary table mechanism 312 and the tailstock 313; one end of the bridge plate 32 is rotatably connected to the tailstock 313; the other end of the bridge plate 32 is drivingly connected to the rotary driving end of the rotary table mechanism 312, and the rotary table mechanism 312 can drive the bridge plate 32 to overturn around the rotation axis parallel to the opposite direction of the rotary table mechanism 312 and the tailstock 313.

[0064] The bottom plate 311 is used for quickly assembling the rotary table mechanism 312 and the tailstock 313 on the table top 31; the rotary table mechanism 312 is used for controlling the bridge plate 32 to overturn and positioning the spatial pose of the bridge plate 32, and the tailstock 313 is used for supporting the bridge plate 32 in cooperation with the rotary table mechanism 312.

[0065] Specifically, the workbench 13 of the numerical control machining center 1 is a horizontally arranged workbench; the bottom plate 311 is tightly fastened and clamped on the upper surface of the workbench 13. The rotary table mechanism 312 can be selected from existing products; the tailstock 313 has a horizontally arranged shaft hole and a rotating shaft 3131 coaxially installed in the shaft hole, and the rotating shaft 3131 of the tailstock 313 is coaxially arranged with the rotary driving end 3121 of the rotary table mechanism 312.

[0066] Specifically, the tailstock 313 is provided with a mounting plate one 3132 at one end close to the rotary table mechanism 312, and the mounting plate one 3132 is fixedly connected to the rotating shaft 3131; the rotary table mechanism 312 is provided with a mounting plate two 3122 at one end close to the tailstock 313; the mounting plate two 3122 is fixedly connected to the rotary driving end 3121; one end of the bridge plate 32 is positioned and installed on the mounting plate one 3132 through bolts; the other end of the bridge plate 32 is positioned and installed on the mounting plate two 3122 through bolts.

[0067] Specifically, the rotary table mechanism 312 and the lower end of the tailstock 313 are both provided with a pad 3111 between the upper plate surface of the bottom plate 311.

[0068] In some embodiments, the avoidance through hole group 321 includes avoidance through hole one 3211, avoidance through hole two 3212, and avoidance through hole three 3213.

[0069] The avoidance through hole one 3211 and the avoidance through hole two 3212 are arranged in the length direction of the bridge plate 32 and correspond to the middle part of the width direction of the bridge plate 32; the avoidance through hole three 3213 is located on one side of the width direction of the bridge plate 32 and corresponds to the space between the avoidance through hole one 3211 and the avoidance through hole two 3212.

[0070] The avoidance through hole one 3211, the avoidance through hole two 3212, and the avoidance through hole three 3213 can adapt to the through arrangement of one end of the three pillars 71 of the three-pole insulator 7, providing a polishing space for the through end polishing of the three pillars 71 of the three-pole insulator 7.

[0071] Specifically, the hole diameters of the avoidance through hole one 3211, the avoidance through hole two 3212, and the avoidance through hole three 3213 are all greater than the outer diameters of the three pillars 71 of the corresponding three-pole insulator 7.

[0072] In some embodiments, the insulator leg clamping mechanism 33 includes a V-shaped positioning block 331, a clamping oil cylinder one 332, a connecting plate one 333, a flexible clamping arm one 334, a clamping oil cylinder two 335, a connecting plate two 336, and a flexible clamping arm two 337; the V-shaped positioning block 331, the clamping oil cylinder one 332, and the clamping oil cylinder two 335 are all installed on the side surface of the bridge plate 32 away from the workbench 13; the clamping oil cylinder one 332 and the clamping oil cylinder two 335 are symmetrically arranged at both ends of the V-shaped positioning block 331; the extension rods of the clamping oil cylinder one 332 and the clamping oil cylinder two 335 are all perpendicular to the surface of the bridge plate 32.

[0073] The one end of the connecting plate one 333 is hinged to the upper part of the cylinder body of the clamping oil cylinder one 332 near the one end of the clamping oil cylinder two 335; the one end of the flexible clamping arm one 334 is hinged to the telescopic rod of the clamping oil cylinder one 332, and the middle part of the flexible clamping arm one 334 is hinged to the other end of the connecting plate one 333; the telescopic rod of the clamping oil cylinder one 332 can drive the flexible clamping arm one 334 to turn to approach or move away from the V-shaped opening of the V-shaped positioning block 331.

[0074] The one end of the connecting plate two 336 is hinged to the upper part of the cylinder body of the clamping oil cylinder two 335 near the one end of the clamping oil cylinder one 332; the one end of the flexible clamping arm two 337 is hinged to the telescopic rod of the clamping oil cylinder two 335, and the middle part of the flexible clamping arm two 337 is hinged to the other end of the connecting plate two 336; the telescopic rod of the clamping oil cylinder two 335 can drive the flexible clamping arm two 337 to turn to approach or move away from the V-shaped opening of the V-shaped positioning block 331.

[0075] When clamping the three-column insulator, the legs 72 of the three-column insulator 7 are placed in the V-shaped opening of the V-shaped positioning block 331 for positioning; the clamping oil cylinder one 332 drives the flexible clamping arm one 334 to press and clamp the legs of the three-column insulator, and the clamping oil cylinder two 335 drives the flexible clamping arm two 337 to press and clamp the legs of the three-column insulator, so that the legs of the three-column insulator are stably clamped in the V-shaped positioning block 331; under the hinged guiding action of the connecting plate one 333 and the connecting plate two 336, the corresponding flexible clamping arm one 334 and the flexible clamping arm two 337 have a larger turning and clamping activity space, which can adapt to clamping the legs of three-column insulators of different sizes with high precision.

[0076] Specifically, the inner wall surface of the V-shaped positioning block 331 is provided with a flexible pad 338, and the other end of the flexible clamping arm one 334 and the other end of the flexible clamping arm two 337 are provided with a flexible protective sleeve 339; the flexible pad 338 and the protective sleeve 339 can ensure that the workpiece is stably fixed during machining and the surface is not damaged.

[0077] In some embodiments, the insulator leg clamping mechanism 33 is a plurality of; the insulator leg clamping mechanism 33 is arranged on both sides of the length direction of the bridge plate 32 away from the avoiding through hole three 3213; the insulator leg clamping mechanism 33 is arranged on one side of the avoiding through hole one 3211 and the avoiding through hole two 3212 away from the avoiding through hole three 3213.

[0078] The plurality of insulator leg clamping mechanisms 33 correspond to the plurality of legs 72 of the three-column insulator 7 for positioning and clamping, forming a more stable clamping structure, which effectively improves the machining precision.

[0079] The flexible clamp design can adapt to three-pillar insulators of different sizes and shapes, the clamp design takes into account the special structure of the three-pillar insulator, and through modular design and adjustable clamping mechanism, the workpiece is stably fixed without deformation and surface damage during processing. The flexible design of the clamp can complete the processing of the three pillars of the three-pillar insulator at one time, significantly improving the processing efficiency.

[0080] In some embodiments, the inner circumferential walls of the avoidance through holes one 3211, the avoidance through holes two 3212 and the avoidance through holes three 3213 have a polishing tool avoidance space 3214 between the outer circumferential walls of the corresponding three-pillar insulator pillars inserted therein;

[0081] The avoidance through holes three 3213 are away from the inner side wall openings of the avoidance through holes one 3211 and the avoidance through holes two 3212 to form a sprue position polishing avoidance opening 3215.

[0082] By providing a polishing tool avoidance space 3214 in the avoidance through holes one 3211, the avoidance through holes two 3212 and the avoidance through holes three 3213, a working space is provided for the polishing tool to enter the avoidance through holes and effectively polish the three pillars of the three-pillar insulator; the sprue position polishing avoidance opening 3215 formed by opening one side of the avoidance through holes three 3213 provides a polishing tool avoidance space for polishing the sprue position bump 73 of the three-pillar insulator, so that all polishing processes can be completed at one time, significantly improving the work efficiency.

[0083] In some embodiments, an ultrasonic machining auxiliary device 4 is further included, which is installed on the main shaft 11 of the numerical control machining center 1 and is used to drive the polishing tool 12 to vibrate.

[0084] By using the ultrasonic machining auxiliary device 4, the polishing cutting force and the thermal influence can be reduced, and the machining efficiency and the surface quality can be improved.

[0085] Specifically, the ultrasonic machining auxiliary device 4 can be designed or selected using existing technology or existing products.

[0086] In some embodiments, a dust treatment device 5 is further included, which is installed on the base of the numerical control machining center 1 and the dust suction port 51 is arranged above the bridge plate 32, which is used to suck the dust or debris generated during the polishing operation.

[0087] The dust treatment device 5 can timely remove the dust and debris generated during the processing; by arranging the dust suction port 51 near the main shaft, the cleanliness of the processing area can be ensured, the influence of dust on the processing precision can be reduced, the working environment can be improved, and the health of the operator can be protected. The dust treatment device 5 can be designed or selected using existing technology or existing products.

[0088] In some embodiments, a compressed air cooling system 6 is further included, and the cold air outlet 61 of the compressed air cooling system 6 can be arranged corresponding to the polishing tool installed on the main shaft of the numerical control machining center 1 to blow air to cool the polishing tool. The compressed air cooling system 6 can be designed according to the prior art or selected from existing products.

[0089] In some embodiments, a monitoring system is further included, which is installed on the numerical control machining center, and the machining state can be fed back in real time through the integrated monitoring system. The machining parameters can be automatically adjusted as needed to ensure the machining quality.

[0090] Another embodiment of the present application provides a high-precision grinding machining method for a three-strut insulator, which uses a high-precision grinding machining device for a three-strut insulator, and includes the following steps:

[0091] Step one: insert the three struts of the three-strut insulator into the avoiding through hole group 321 of the bridge plate 32, and clamp the legs of the three-strut insulator by using the insulator leg clamping mechanism 33 to tightly clamp and fasten the three-strut insulator on the bridge plate 32.

[0092] Step two: control the bridge plate 32 to flip and position by using the turnover frame mechanism 31, measure the three-strut insulator by using the measuring head 2 to establish a machining coordinate system, make one side of the bridge plate 32 correspond to and be perpendicular to the main shaft of the numerical control machining center 1, control the movement of the polishing tool by using the numerical control machining center 1 to polish one end of the three struts of the three-strut insulator.

[0093] Step three: control the bridge plate 32 to flip and position by using the turnover frame mechanism 31 to make the other side of the bridge plate 32 correspond to and be perpendicular to the main shaft of the numerical control machining center 1, control the movement of the polishing tool by using the numerical control machining center 1 to polish the other end of the three struts of the three-strut insulator.

[0094] Specifically, during clamping, the three legs 72 of the three-strut insulator 7 are placed on the V-shaped positioning block 331, the corresponding clamping oil cylinder one 332 drives the flexible clamping arm one 334 to rise, the clamping oil cylinder two 335 drives the flexible clamping arm two 337 to rise, the three legs 72 are clamped in the V-shaped opening of the V-shaped positioning block 331, and the turntable mechanism 312 drives the bridge plate 32 to automatically correct to the horizontal position. The measuring head 2 detects the three circumferences, the centers of the three circumferences, and the gate positions of one end of the three struts 71, the control system establishes a grinding space coordinate system through the detected positions, and the macro program automatically fits a non-circular grinding route through the detected grinding outer circle points. The polishing tool 12 starts grinding according to the above-mentioned space coordinate system and fitting collection until the parameters are met, and after this process is completed, the grinding head is replaced with a diamond brush to brush off the residual burrs of the external joint seam of the three struts (workpiece).

[0095] Specifically, after the above process is completed, the rotary table mechanism 312 drives the bridge plate 32 and the three-leg insulator 7 mounted thereon to rotate 180 degrees, and the probe 2 is used to detect the three circumferences, the center position and the gate position of the other end of the three legs 71 of the three-leg insulator 7. The control system establishes a grinding space coordinate system through the detection position, and the macro program automatically fits a non-circular grinding path through the detection of the outer circle points. The grinding head starts grinding according to the above-mentioned space coordinate system and fitting collection until the parameters are met. Then, the rotary table mechanism 312 drives the bridge plate 32 and the three-leg insulator 7 mounted thereon to rotate 180 degrees, and the corresponding clamping oil cylinder one 332 falls to drive the flexible clamping arm one 334, and the clamping oil cylinder two 335 falls to drive the flexible clamping arm two 337 to release the three legs 72. The three-leg insulator 7 after grinding is removed, and the grinding is completed.

[0096] After processing is completed, high-precision detection equipment is used to detect the processed insulator to ensure that the surface roughness and flatness meet the design requirements. The detection results are fed back to the control system for optimization of subsequent processing. The present application can efficiently and accurately complete the processing task of three-leg insulators of different sizes, significantly improve the processing efficiency and quality, and improve the working environment, providing a new solution for the high-voltage switch device manufacturing field.

[0097] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present specification.

[0098] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A high-precision grinding machine for three-post insulators, characterized in that, The utility model relates to a numerical control machining center (1), a measuring head (2) is installed on the numerical control machining center (1) and is connected with the control system of the numerical control machining center (1), a clamping assembly (3) includes a turnover frame mechanism (31), a bridge plate (32) and an insulator leg clamping mechanism (33), the turnover frame mechanism (31) is installed on the workbench of the numerical control machining center (1), the turnover drive end of the turnover frame mechanism (31) is connected with the bridge plate (32) to drive its turnover, the bridge plate (32) is provided with a group of avoiding through holes (321) for avoiding three support posts of three support posts insulators on the plate surface, and the insulator leg clamping mechanism (33) is installed on the plate surface of the bridge plate (32) and is arranged on the outer circumferential side of the group of avoiding through holes (321). The turnover frame mechanism (31) includes a bottom plate (311), a rotary table mechanism (312) and a tailstock (313), the bottom plate (311) is installed in parallel on the workbench surface of the numerical control machining center (1), the rotary table mechanism (312) and the tailstock (313) are both installed on the plate surface of the side of the bottom plate (311) away from the workbench, the rotary table mechanism (312) and the tailstock (313) are arranged in opposite directions in parallel with the plate surface of the bottom plate (311), the bridge plate (32) is located between the rotary table mechanism (312) and the tailstock (313), one end of the bridge plate (32) is rotatably connected to the tailstock (313), the rotary drive end of the rotary table mechanism (312) is connected with the other end of the bridge plate (32), and the rotary table mechanism (312) can drive the bridge plate (32) to overturn around the rotation axis in parallel with the opposite direction of the rotary table mechanism (312) and the tailstock (313). The group of avoiding through holes (321) includes avoiding through hole one (3211), avoiding through hole two (3212) and avoiding through hole three (3213), avoiding through hole one (3211) and avoiding through hole two (3212) are arranged in parallel along the length direction of the bridge plate (32) and correspond to the middle part of the width direction of the bridge plate (32), and avoiding through hole three (3213) is located on one side of the width direction of the bridge plate (32) and corresponds to the space between avoiding through hole one (3211) and avoiding through hole two (3212). ​ ​ 2. The high-precision grinding device for three-strut insulators according to claim 1, characterized in that, ​ 3. The high-precision grinding device for three-strut insulators according to claim 2, characterized in that, ​ ​ 4. The high-precision grinding device for three-leg post insulators according to claim 3, characterized in that, The insulator leg clamping mechanism (33) comprises a V-shaped positioning block (331), a clamping oil cylinder I (332), a connecting plate I (333), a flexible clamping arm I (334), a clamping oil cylinder II (335), a connecting plate II (336) and a flexible clamping arm II (337); the V-shaped positioning block (331), the clamping oil cylinder I (332) and the clamping oil cylinder II (335) are all installed on the side surface of the bridge plate (32) away from the workbench; the clamping oil cylinder I (332) and the clamping oil cylinder II (335) are symmetrically arranged at both ends of the V-shaped positioning block (331); the telescopic rods of the clamping oil cylinder I (332) and the clamping oil cylinder II (335) are all perpendicular to the surface of the bridge plate (32); One end of the connecting plate I (333) is hingedly connected to the upper part of one end of the cylinder body of the clamping oil cylinder I (332) close to the clamping oil cylinder II (335); one end of the flexible clamping arm I (334) is hingedly connected to the telescopic rod of the clamping oil cylinder I (332), and the middle part of the flexible clamping arm I (334) is hingedly connected to the other end of the connecting plate I (333); the telescopic rod of the clamping oil cylinder I (332) can drive the flexible clamping arm I (334) to turn over to approach or move away from the V-shaped opening of the V-shaped positioning block (331); One end of the connecting plate II (336) is hingedly connected to the upper part of one end of the cylinder body of the clamping oil cylinder II (335) close to the clamping oil cylinder I (332); one end of the flexible clamping arm II (337) is hingedly connected to the telescopic rod of the clamping oil cylinder II (335), and the middle part of the flexible clamping arm II (337) is hingedly connected to the other end of the connecting plate II (336); the telescopic rod of the clamping oil cylinder II (335) can drive the flexible clamping arm II (337) to turn over to approach or move away from the V-shaped opening of the V-shaped positioning block (331).

5. The high-precision grinding device for three-strut insulators according to claim 4, characterized in that, The insulator leg clamping mechanism (33) is a plurality of; the avoidance through hole three (3213) is uniformly arranged with the insulator leg clamping mechanism (33) on both sides of the length direction of the bridge plate (32); the avoidance through hole one (3211) and the avoidance through hole two (3212) are arranged with the insulator leg clamping mechanism (33) on the side away from the avoidance through hole three (3213).

6. The high-precision grinding device for three-strut insulators according to claim 3, characterized in that, The inner circumferential wall of the avoidance through hole one (3211), the avoidance through hole two (3212) and the avoidance through hole three (3213) has a polishing tool avoidance space (3214) between the outer circumferential wall of the corresponding three-strut insulator inserted therein; The inner side wall opening of the avoidance through hole three (3213) away from the avoidance through hole one (3211) and the avoidance through hole two (3212) forms a sprue position polishing avoidance port (3215).

7. The high-precision grinding device for three-strut insulators according to claim 1, characterized in that, It also includes an ultrasonic machining auxiliary device (4) installed on the spindle of the numerical control machining center (1), which is used to drive the polishing tool to vibrate.

8. The high-precision grinding device for three-strut insulators according to claim 7, characterized in that, The dust treatment device (5) is installed on the base of the numerical control machining center (1) and the dust suction port (51) is arranged above the bridge plate (32) to suck the dust and debris generated during the grinding operation.

9. The high-precision grinding device for three-strut insulators according to claim 1, characterized in that, The compressed air cooling system (6) is installed on the spindle of the numerical control machining center (1) to blow and cool the grinding tool.

10. A high-precision grinding method for a three-strut insulator, characterized by, The high-precision grinding processing equipment for the three-column insulator according to any one of claims 1-9 comprises the following steps: Step one: insert the three columns of the three-column insulator into the avoidance through hole group (321) of the bridge plate (32), and clamp the legs of the three-column insulator by using the insulator leg clamping mechanism (33) to clamp and fasten the three-column insulator on the bridge plate (32); Step two: control the turning and positioning of the bridge plate (32) by using the turning frame mechanism (31), measure the three-column insulator by using the measuring head (2) to establish the processing coordinate system, make one side of the bridge plate (32) correspond to and be perpendicular to the spindle of the numerical control machining center (1), control the movement of the grinding tool by using the numerical control machining center (1) to grind and process one end of the three columns of the three-column insulator; Step three: control the turning and positioning of the bridge plate (32) by using the turning frame mechanism (31) to make the other side of the bridge plate (32) correspond to and be perpendicular to the spindle of the numerical control machining center (1), control the movement of the grinding tool by using the numerical control machining center (1) to grind and process the other end of the three columns of the three-column insulator.

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