Grinding device for inner hole surface of flange plate

Abstract

The invention discloses a grinding device for an inner hole face of a flange plate, and relates to the technical field of flange plate machining, the grinding device comprises a bottom plate, a hollow disc and the flange plate, the bottom plate supports the hollow disc through three U-shaped supports, and the flange plate is placed on the top face of the hollow disc and fixed through a clamping mechanism; a lifting plate is arranged above the base plate and driven by the base plate through a lifting mechanism. A second connecting shaft on the top face of the lifting plate is connected with the hollow shaft and corresponds to the flange hole in position. A first clamping ring, a double-layer clamping ring and a second clamping ring are arranged on the outer surface of the hollow shaft, an embedding plate embedded with a diamond millstone is clamped in a rectangular notch in a sliding mode, and the outer side face of the millstone is trapezoidal and provided with a U-shaped groove. The fixing disc is in linkage with the second connecting shafts through the transmission mechanism, and eccentric transmission and synchronous rotation are achieved. The stability of a workpiece is ensured through a bidirectional clamping mechanism, synchronous operation of multiple shafts is achieved through eccentric transmission, and dynamic pressure is adjusted by combining lifting of a lead screw, a spring and a conical head. The flange hole grinding device is suitable for efficient and precise machining of the inner hole face of the flange plate.

Description

Technical Field

[0001] The invention relates to the technical field of flange processing, and in particular to a grinding device for the inner hole surface of a flange. Background Art

[0002] Flanges are widely used as essential connectors in industrial manufacturing. They connect two pipes or equipment, ensuring a tight fit. The quality of flanges directly impacts the sealing and safety of piping systems. One of the key components of a flange is its inner surface, and its quality directly impacts its overall performance.

[0003] Traditional flange inner hole grinding devices generally adopt single-direction clamping, which results in insufficient workpiece fixation stability and easy displacement during grinding; the multi-axis transmission mechanism has poor synchronization, resulting in uneven rotation speed of each grinding head and inconsistent grinding accuracy; the lifting mechanism is mostly manually adjusted or simply driven by a screw, with low positioning accuracy and cumbersome operation; the grinding pressure relies on manual experience adjustment and lacks a dynamic adaptive mechanism, which is prone to over-grinding or under-grinding problems, making it difficult to meet high-precision processing requirements. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcoming of poor grinding effect of flange inner hole in the prior art, and to propose a grinding device for the inner hole surface of a flange.

[0005] In order to solve the problems existing in the prior art, the present invention adopts the following technical solutions: A device for grinding the inner hole surface of a flange, comprising a base plate, a hollow disk disposed above the base plate, three circularly distributed U-shaped brackets fixed to the bottom surface of the hollow disk, the bottom end of each U-shaped bracket being fixed to the top surface of the base plate, a concentrically distributed flange placed on the top surface of the hollow disk, and the base plate being connected to the flange via a clamping mechanism; A lifting plate is provided above the flange, and the bottom plate is connected to the lifting plate through a lifting mechanism; A plurality of second connecting shafts are rotatably inserted into the top surface of the lifting plate and are distributed in a circular pattern. An L-shaped connecting plate is fixed on the top surface of the lifting plate. An eccentrically distributed fixed plate is provided between the L-shaped connecting plate and the lifting plate. The fixed plate is connected to the plurality of second connecting shafts through a transmission mechanism. A hollow shaft is fixedly provided at the bottom end of each second connecting shaft, and the hollow shafts correspond one-to-one to the flange holes on the flange plate; The middle and lower parts of the outer surface of each hollow shaft are sequentially sleeved with a first clasp, a double-layer clasp, and a second clasp that are concentrically fixed. The outer surface of each hollow shaft is provided with a rectangular notch that passes through the first clasp, the double-layer clasp, and the second clasp from top to bottom. An inlay plate is slidably engaged with the interior of each rectangular notch, and a diamond grinding stone is inlaid and engaged with the outer side surface of each inlay plate. The outer side surface of the diamond grinding stone is in a trapezoidal shape, and a U-shaped groove is vertically opened on the outer side surface of the diamond grinding stone.

[0006] Preferably, the clamping mechanism includes a first slide plate, an L-shaped connecting rod, and a first curved clamping plate. Three circularly distributed first fixing plates are fixed to the middle part of the top surface of the bottom plate, and a first sliding hole is opened at the top end of each of the first fixing plates. A first slide plate is slidably inserted into the interior of each of the first sliding holes. A vertically distributed L-shaped connecting rod is fixed to the middle part of each of the first slide plates, and a first curved clamping plate is fixed to the top end of each of the L-shaped connecting rods. The outer curved surface of each of the first curved clamping plates is opened with a number of evenly distributed first anti-slip grooves, and each first curved clamping plate rests on the inner annular surface of the flange.

[0007] Preferably, three circularly distributed second fixing plates are fixed to the outer periphery of the top surface of the bottom plate, and a second sliding hole is opened at the top end of each second fixing plate, and a second slide is slidably inserted into the inside of each second sliding hole, and the outer end of each second slide is fixed with a U-shaped bent rod, and the two ends of each U-shaped bent rod are fixed with a clamping rod, and the other end of each clamping rod is fixed with a U-shaped ear seat, and a single ear seat with a movable hinge is provided in the opening of each U-shaped ear seat, and the other end of each single ear seat is fixed with a second arc splint, and the inner arc surface of each second arc splint is opened with a number of evenly distributed second anti-slip grooves, and each second arc splint rests on the outer annular surface of the flange.

[0008] Preferably, a first motor with its output end facing upward is installed in the middle of the top surface of the base plate, and a turntable is fixed to the output end of the first motor. Three elliptical pin holes distributed in a circle are opened on the turntable, and a limiting pin is fixed to the inner end of each of the first skateboards, and the bottom end of each of the limiting pins is slidably engaged in the corresponding elliptical pin hole.

[0009] Preferably, three circularly distributed linkage shafts are rotatably inserted into the bottom surface of the hollow disk, and the bottom end of each linkage shaft is fixed with a double-headed hinged link, and the inner and outer ends of each double-headed hinged link are respectively hinged with a first hinged link and a second hinged link, and the other end of each first hinged link is movably hinged to the outer end of the corresponding first skateboard, and the other end of each second hinged link is movably hinged to the inner end of the corresponding second skateboard.

[0010] Preferably, the lifting mechanism includes a fixed rod, a lead screw, and a second motor; an extension plate is fixedly provided on the back of the base plate; an elliptical transverse plate is provided parallel to the extension plate directly above the extension plate; the elliptical transverse plate is located above the lifting plate; a pair of through-distributed fixed slides are fixedly provided at the two corners of the rear side of the lifting plate; a through-distributed fixed rod is slidably inserted into the interior of each of the fixed slides; and the upper and lower ends of each of the fixed rods are fixedly inserted into the elliptical transverse plate and the extension plate respectively; A rectangular threaded cylinder is fixedly provided in the middle of the rear side of the lifting plate, and a lead screw is spirally inserted into the interior of the rectangular threaded cylinder. The upper and lower ends of the lead screw are rotatably inserted on the elliptical cross plate and the extension plate respectively. A second motor with the output end facing downward is installed in the middle of the top surface of the elliptical cross plate, and the output end of the second motor is fixedly connected to the top end of the lead screw.

[0011] Preferably, the transmission mechanism includes a third motor, a crank swing arm, and a bending swing arm. The front end of the L-shaped connecting plate is installed with the third motor with the output end facing downward. The output end of the third motor is fixed with a crank swing arm. The other end of the crank swing arm is rotatably inserted with a vertically distributed fixed shaft, and the fixed shaft is fixedly inserted in the middle of the top surface of the fixed plate. The top end of each second connecting shaft is fixedly provided with a bending swing arm, the top end of each bending swing arm is fixedly provided with a first connecting shaft, and the top end of each first connecting shaft is rotatably inserted on the bottom surface of the fixed disk.

[0012] Preferably, a pair of bayonet pins are fixed in the middle of each of the inlaid plates, and each pair of bayonet pins are slidably engaged between the double-layer retaining rings, a pair of first semicircular grooves are opened on the upper and lower sides of the outer side surface of each of the inlaid plates, and a pair of second semicircular grooves are opened on the upper and lower sides of the inner side surface of each of the diamond grinding stones, and the first semicircular grooves and the second semicircular grooves are closed to each other to form an annular channel, and a pair of annular springs are sleeved on the middle and lower part of the outer surface of the hollow shaft, and each of the annular springs is sequentially inserted into the corresponding several annular channels.

[0013] Preferably, a cavity 1 is provided at the top of the hollow shaft, a cavity 2 is provided at the middle and lower part of the hollow shaft, a positioning slide hole is provided between the cavity 1 and the cavity 2, a T-shaped slide rod is inserted into the interior of the positioning slide hole, a buffer spring is sleeved on the upper half of the T-shaped slide rod, and the bottom end of the buffer spring is against the bottom wall of the cavity 1. A positioning pin hole is respectively provided on the upper and lower sides of each rectangular notch, each positioning pin hole is distributed in a through-hole with cavity 2, a positioning pin is slidably inserted into the interior of each positioning pin hole, the outer end portion of each positioning pin is fixedly connected to the corresponding inlay plate, and the inner end portion of each positioning pin is in the shape of an inclined tip.

[0014] Preferably, the bottom end of each T-shaped sliding rod is fixed with a first conical head, the bottom end of each first conical head is fixed with a connecting rod, and the bottom end of each connecting rod is fixed with a second conical head. The first conical head, connecting rod and second conical head located in the same cavity 2 are all slidably arranged with the inner wall of cavity 2, and the inner end of each pair of positioning pins respectively abuts against the first conical head and the second conical head.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the inner and outer rings of the first and second arc-shaped clamping plates are used for bidirectional clamping, thereby achieving rapid positioning and stable fixation of the flange; the fixed plate drives multiple second connecting shafts to rotate synchronously, ensuring that the hollow shaft and the diamond grindstone rotate at the same speed, thereby improving grinding uniformity and processing efficiency; 2. In the present invention, the conical head assembly in the hollow shaft is combined with a spring structure, which uses centrifugal force and reaction force to dynamically adjust the extension distance of the diamond grindstone to avoid excessive or insufficient pressure, significantly improving the grinding accuracy and surface quality; To sum up, the present invention ensures the stability of workpiece fixation through a bidirectional clamping mechanism, uses eccentric transmission to achieve multi-axis synchronous rotation, and combines the lifting of the screw with the spring and dynamic pressure adjustment of the conical head to solve the problems of unstable clamping, poor synchronization, and unadjustable pressure of traditional grinding devices, and significantly improves the efficiency and accuracy of flange hole grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall structure of the present invention in working state; Figure 3 It is a schematic diagram of the overall structure of the present invention from another perspective; Figure 4 It is a structural schematic diagram of the clamping mechanism of the present invention; Figure 5 It is a schematic exploded view of the structure of the clamping mechanism of the present invention; Figure 6 It is a structural schematic diagram of the transmission mechanism of the present invention; Figure 7 It is a schematic exploded view of the structure of the transmission mechanism of the present invention; Figure 8 It is a structural schematic diagram of the hollow shaft of the present invention; Figure 9 It is a schematic diagram of the cross-section explosion of the hollow shaft of the present invention; Serial numbers in the figure: 100, bottom plate; 101, hollow plate; 102, flange; 103, U-shaped bracket; 104, L-shaped connecting rod; 105, first curved clamping plate; 106, second slide plate; 107, U-shaped bending connecting rod; 108, clamping connecting rod; 109, second curved clamping plate; 200, first motor; 201, turntable; 202, first fixed plate; 203, first slide plate; 204, limit pin; 205, second fixed plate; 206, linkage shaft; 207, double-ended hinged connecting rod; 208, second hinged connecting rod; 209, first hinged connecting rod; 300, extension plate; 301, elliptical horizontal plate; 302, fixing rod; 303, second motor; 304, fixing slide; 305 , screw; 306, rectangular threaded cylinder; 400, lifting plate; 401, L-shaped connecting plate; 402, third motor; 403, crank arm; 404, fixed shaft; 405, fixed disk; 406, first connecting shaft; 407, bending arm; 408, second connecting shaft; 500, hollow shaft; 501, cavity one; 502, cavity two; 503, positioning slide hole; 504, T-shaped slide rod; 505, buffer spring; 506, first conical head; 507, connecting rod; 508, second conical head; 509, first retaining ring; 510, double-layer retaining ring; 511, second retaining ring; 512, inlaid plate; 513, bayonet; 514, positioning pin; 515, diamond grindstone; 516, annular spring. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] Example 1: This example provides a grinding device for the inner hole surface of a flange. Figures 1-9Specifically, it includes a base plate 100, which serves as the basic supporting component of the grinding device and is used to install other components such as a hollow disk 101, a clamping mechanism, a lifting mechanism, etc. to ensure the stability of the entire device. A hollow disk 101 is provided above the base plate 100, and the hollow disk 101 carries a flange 102 to keep it concentrically placed, providing a positioning reference for the flange 102, and is connected to the base plate 100 through a U-shaped bracket 103 at the bottom to form a supporting structure. Three U-shaped brackets 103 distributed in a circular pattern are fixed on the bottom surface of the hollow disk 101, and each U-shaped bracket The bottom ends of the brackets 103 are fixed to the top surface of the base plate 100. The U-shaped brackets 103 are circularly distributed and fixed between the bottom surface of the hollow disk 101 and the top surface of the base plate 100, supporting the hollow disk 101 to ensure that it is parallel and stable to the base plate 100. Concentrically distributed flanges 102 are placed on the top surface of the hollow disk 101, and the base plate 100 is connected to the flanges 102 by a clamping mechanism. The inner surface of the flange hole of the workpiece to be processed by the flange 102 needs to be precisely processed by a grinding device. After being fixed by the clamping mechanism, the flange hole is ground by the diamond grindstone 515. A lifting plate 400 is provided above the flange 102. The lifting plate 400 carries the second connecting shaft 408, the transmission mechanism, and the hollow shaft 500. The lifting mechanism enables the lifting plate 400 to move up and down to adjust the relative position of the diamond grindstone 515 and the flange hole. The bottom plate 100 is connected to the lifting plate 400 via the lifting mechanism. The top surface of the lifting plate 400 is rotatably inserted with a plurality of second connecting shafts 408 distributed through and in a circular shape. The second connecting shaft 408 is rotatably inserted on the top surface of the lifting plate 400 and driven to rotate by the transmission mechanism, thereby driving the hollow shaft 500 and the diamond grindstone 515 to rotate to realize the grinding action. An L-shaped connecting plate 401 is fixed on the top surface of the lifting plate 400, and forms an eccentric layout with the fixed plate 405 to transmit power to the second connecting shaft 408. An eccentrically distributed fixed plate 405 is provided between the L-shaped connecting plate 401 and the lifting plate 400. The fixed plate 405 is eccentrically installed between the L-shaped connecting plate 401 and the lifting plate 400, and is driven to swing eccentrically by the crank swing arm 403, thereby driving the bent swing arm 407 at the top of the second connecting shaft 408 to rotate synchronously, thereby realizing the synchronous rotation of multiple second connecting shafts 408. The fixed plate 405 is connected to the plurality of second connecting shafts 408 through the transmission mechanism. A hollow shaft 500 is fixed to the bottom end of each second connecting shaft 408. A diamond grindstone 515 is mounted on the hollow shaft 500 to dynamically adjust the grinding pressure of the diamond grindstone 515 to ensure grinding accuracy. The hollow shafts 500 correspond one-to-one to the flange holes on the flange plate 102. The middle and lower parts of the outer surface of each hollow shaft 500 are sequentially sleeved with a concentrically fixed first clamping ring 509, a double-layer clamping ring 510, and a second clamping ring 511. The outer surface of each hollow shaft 500 is provided with a rectangular notch that passes through the first clamping ring 509, the double-layer clamping ring 510, and the second clamping ring 511 from top to bottom. The interior of each rectangular notch is slidably engaged with an inlay plate 512, which is slidably engaged in the rectangular notch of the hollow shaft 500 and inlaid with a diamond grindstone 515 to transmit air. The spindle 500 rotates to the diamond grinding stone 515, and the positioning pin 514 is linked to the internal structure of the hollow shaft 500 to adjust the extension distance of the diamond grinding stone 515. The outer side of each mosaic plate 512 is embedded with a diamond grinding stone 515. The first clamping ring 509, the double-layer clamping ring 510, and the second clamping ring 511 provide sliding tracks for the mosaic plates 512 to limit their radial movement range. The rectangular notch cooperates with the mosaic plates 512 to achieve the installation and guidance of the diamond grinding stone 515. The outer side surface of the diamond grindstone 515 is trapezoidal, and a U-shaped groove is vertically opened on the outer side surface of the diamond grindstone 515. The core grinding component of the diamond grindstone 515 has a trapezoidal outer side surface and a U-shaped groove, which is used to efficiently grind the inner surface of the flange hole; dynamic adaptive adjustment of the grinding pressure is achieved through the annular spring 516 and the positioning pin 514.

[0019] It should be noted that: in this embodiment, the clamping mechanism includes a first slide 203, an L-shaped connecting rod 104, and a first arc-shaped clamping plate 105. Three first fixed plates 202 distributed in a circular shape are fixed in the middle of the top surface of the bottom plate 100. The first fixed plate 202 is fixed to the middle of the top surface of the bottom plate 100, providing a first sliding hole to provide guidance and support for the sliding of the first slide 203. The top portion of each first fixed plate 202 is provided with a first sliding hole, and the interior of each first sliding hole is slidably inserted with a first slide 203. The first slide 203 slides in the first sliding hole, and cooperates with the elliptical pin hole of the turntable 201 through the limiting pin 204. It is driven by the first motor 200 to realize radial movement, driving the L-shaped connecting rod 104 and the first arc-shaped clamping plate 105 to complete the initial clamping. Each first slide 203 The middle part is fixed with a vertically distributed L-shaped connecting rod 104, which connects the first slide 203 and the first curved clamping plate 105, transmitting the sliding displacement of the first slide 203, so that the first curved clamping plate 105 is pressed against the inner annular surface of the flange 102 to achieve preliminary clamping. The top end of each L-shaped connecting rod 104 is fixed with a first curved clamping plate 105, and the outer curved surface of each first curved clamping plate 105 is provided with a number of evenly distributed first anti-slip grooves, and each first curved clamping plate 105 is pressed against the inner annular surface of the flange 102. The inner side of the first curved clamping plate 105 is pressed against the inner annular surface of the flange 102, and the friction force is increased by the first anti-slip groove on the surface, so as to perform preliminary positioning and clamping of the flange 102, and cooperate with the L-shaped connecting rod 104, and the opening and closing are realized by the drive of the first slide 203.

[0020] The outer periphery of the top surface of the bottom plate 100 is fixed with three second fixed plates 205 distributed in a circular shape. The second fixed plates 205 are fixed to the outer periphery of the top surface of the bottom plate 100, providing second sliding holes to guide and support the sliding of the second slide plate 106. The top portion of each second fixed plate 205 is provided with a second sliding hole, and the interior of each second sliding hole is slidably inserted with a second slide plate 106. The second slide plate 106 slides in the second sliding hole and is transmitted through the second hinge link 208 and the linkage shaft 206 to drive the U-shaped bending link 107 and the second arc clamping plate 109 to press against the outer ring surface of the flange 102 to achieve secondary clamping. The outer end of each second slide plate 106 is fixed with a U-shaped bending link 107. The U-shaped bending link 107 connects the second slide plate 106 and the clamping link 108 to transmit the sliding displacement of the second slide plate 106, so that the clamping link 108 drives the second arc clamping plate 109 to press against the outer ring surface of the flange 102 to achieve secondary clamping. When the clamping plate 109 moves, both ends of each U-shaped bent link 107 are fixed with a clamping link 108, and the clamping link 108 connects the U-shaped bent link 107 and the U-shaped ear seat, transmitting the displacement to the second arc clamping plate 109, so that it presses against the outer ring surface of the flange 102, and the other end of each clamping link 108 is fixed with a U-shaped ear seat, and each U-shaped ear seat is provided with a movably hinged single ear seat in the opening, and the other end of each single ear seat is fixed with a second arc clamping plate 109. The inner arc surface of each second arc clamping plate 109 is provided with a number of evenly distributed second anti-slip grooves, and each second arc clamping plate 109 presses against the outer ring surface of the flange 102, and the inner side of the second arc clamping plate 109 presses against the outer ring surface of the flange 102, and the fixing effect is enhanced by the second anti-slip groove on the surface, and cooperates with the first arc clamping plate 105 to achieve two-way clamping of the flange 102.

[0021] A first motor 200 with an output end facing upward is installed in the middle of the top surface of the base plate 100. The first motor 200 serves as the power source of the clamping mechanism. The output end drives the turntable 201 to rotate, and through the cooperation of the elliptical pin hole and the limit pin shaft 204, the first slide plate 203 and the second slide plate 106 are driven to move to achieve the clamping action. The output end of the first motor 200 is fixed with a turntable 201. The turntable 201 is driven to rotate by the first motor 200. Through the cooperation of the elliptical pin hole and the limit pin shaft 204, the rotational motion is converted into the first slide plate 20 3 is linearly moved and transmitted to the second slide 106 through the linkage shaft 206. Three elliptical pin holes distributed in a circle are opened on the turntable 201. A limiting pin 204 is fixed to the inner end of each first slide 203. The bottom end of each limiting pin 204 is slidably engaged in the corresponding elliptical pin hole. The limiting pin 204 is fixed to the inner end of the first slide 203 and inserted into the elliptical pin hole of the turntable 201, converting the rotational motion of the turntable 201 into the linear motion of the first slide 203, thereby realizing the transmission of the clamping action.

[0022] The bottom surface of the hollow disk 101 is rotatably inserted with three circularly distributed linkage shafts 206, which are rotatably inserted on the bottom surface of the hollow disk 101, and the first hinge link 209 and the second hinge link 208 are connected by a double-headed hinge link 207 to transmit the movement of the first slide 203 to the second slide 106, thereby realizing the linkage of the clamping mechanism. The bottom end of each linkage shaft 206 is fixed with a double-headed hinge link 207, and the two ends of the double-headed hinge link 207 are respectively hinged to the first hinge link 209 and the second hinge link 208, thereby converting the swing of the linkage shaft 206 into the linear motion of the first slide 203 and the second slide 106, thereby realizing the transmission of the clamping force. The inner and outer ends of the connecting rod 207 are respectively hinged with a first hinge link 209 and a second hinge link 208. The first hinge link 209 connects the double-headed hinge link 207 and the first slide 203, transmits the swing of the linkage shaft 206, and drives the first slide 203 to slide outward. The other end of each first hinge link 209 is movably hinged to the outer end of the corresponding first slide 203. The second hinge link 208 connects the double-headed hinge link 207 and the second slide 106, transmits the swing of the linkage shaft 206, and drives the second slide 106 to slide inward. The other end of each second hinge link 208 is movably hinged to the inner end of the corresponding second slide 106.

[0023] The working principle of this embodiment is as follows: the flange 102 is concentrically placed on the top surface of the hollow disk 101, the first motor 200 is started, and its output end drives the turntable 201 to rotate. The circularly distributed elliptical pin holes on the turntable 201 cooperate with the limit pin 204 at the inner end of the first slide plate 203 to form a limit constraint; under this mechanism, the first slide plate 203, the L-shaped connecting rod 104 and the first curved clamping plate 105 slide outward along the first sliding hole at the top end of the first fixed plate 202 until the outer curved surface of the first curved clamping plate 105 is pressed against the inner annular surface of the flange 102. At this time, the first anti-slip groove increases the friction force, completing the initial positioning and clamping of the flange 102; During the outward sliding of the first slide plate 203, the hinged transmission of the first hinged link 209 drives the linkage shaft 206 inserted in the bottom surface of the hollow disk 101 to swing, and the double-headed hinged link 207 at the lower end of the linkage shaft 206 swings accordingly; then, the second hinged link 208 transmits the swinging motion to the second slide plate 106, causing it to slide inward along the second sliding hole at the top end of the second fixed plate 205; the second slide plate 106 drives the U-shaped bending link 107 and the clamping link 108 to move, and with the help of the hinged structure of the U-shaped ear seat and the single ear seat, it finally pushes the second arc clamping plate 109 to press against the outer annular surface of the flange 102, and the second anti-slip groove further enhances the fixing effect, thereby achieving a secondary firm clamping of the flange 102; After the flange 102 is secured, the transmission mechanism begins to operate, driving the fixed plate 405 between the L-shaped connecting plate 401 and the lifting plate 400 to rotate. The fixed plate 405, through the transmission connection, drives the synchronous rotation of several second connecting shafts 408 distributed in a circular pattern on the top surface of the lifting plate 400. The second connecting shafts 408, in turn, drive the hollow shaft 500 fixed at the bottom end to rotate, causing the inlay plate 512 and the diamond grindstone 515 embedded therein to rotate together. Subsequently, the lifting mechanism is started, controlling the lifting plate 400 to descend smoothly, driving the hollow shaft 500 and the diamond grindstone 515 below to slowly approach the flange 102; when the diamond grindstone 515 contacts the inner surface of the flange hole on the flange 102, the special structure of the diamond grindstone 515 with a trapezoidal outer side and a U-shaped slot is used to efficiently grind the flange hole during the rotation process until the required processing accuracy is achieved.

[0024] Example 2: Based on Example 1, Example 2 focuses on solving two major technical pain points: First, to address the problem of inconvenient lifting and lowering operation of the lifting plate 400, the structural design is optimized to achieve smooth and precise lifting control; second, to solve the problem of multiple hollow shafts 500 not being able to rotate synchronously, the transmission mechanism is improved to ensure that the hollow shafts 500 operate in a coordinated and consistent manner during the grinding operation, and also includes: In the specific implementation process, Figure 1 and Figure 3 As shown, the lifting mechanism includes a fixed rod 302, a lead screw 305, and a second motor 303. An extension plate 300 is fixed to the back of the base plate 100, and the extension plate 300 is fixed to the back of the base plate 100 to support the fixed rod 302 and the lead screw 305 of the lifting mechanism, and provide an installation reference for the lifting plate 400. A parallel elliptical cross plate 301 is provided just above the extension plate 300. The elliptical cross plate 301 is located above the lifting plate 400 and forms a lifting guide structure together with the extension plate 300. The rear of the lifting plate 400 A pair of through-distributed fixed slides 304 are fixed at the two corners of the side. The fixed slides 304 are sleeved outside the fixed rods 302 to provide support and guidance for the lifting process to prevent the lifting plate 400 from shaking. A through-distributed fixed rod 302 is slidably inserted into the interior of each fixed slide 304. The upper and lower ends of each fixed rod 302 are fixedly inserted on the elliptical cross plate 301 and the extension plate 300 respectively. The fixed rod 302 passes through the fixed slides 304 to provide vertical guidance for the lifting plate 400 to ensure smooth lifting. The upper and lower ends of the lead screw 305 are respectively rotatably inserted into the elliptical cross plate 301 and the extension plate 300. A second motor 303 with an output end facing downward is installed in the middle of the top surface of the elliptical cross plate 301. The output end of the second motor 303 is fixedly connected to the top end of the lead screw 305. The second motor 303 serves as the power source of the lifting mechanism. The output end drives the lead screw 305 to rotate, and drives the lifting plate 400 to move up and down along the fixed rod 302 through the threaded transmission, thereby realizing the precise positioning of the grinding parts.

[0025] In the specific implementation process, Figure 6 and Figure 7 As shown, the transmission mechanism includes a third motor 402, a crank swing arm 403, and a bending swing arm 407. The front end of the L-shaped connecting plate 401 is installed with a third motor 402 with an output end facing downward. The third motor 402 serves as the power source of the transmission mechanism. The output end drives the crank swing arm 403 to rotate, and drives the fixed plate 405 to swing eccentrically through the fixed shaft 404 to achieve synchronous rotation of the second connecting shaft 408. The output end of the third motor 402 is fixed with a crank swing arm 403, and the crank swing arm 403 is connected to the third motor 402. The output end of the third motor 402 is connected to the fixed shaft 404, which converts the rotational motion of the third motor 402 into the eccentric swing of the fixed disk 405, driving the second connecting shaft 408 to rotate. The other end of the crank swing arm 403 is rotated and inserted with a vertically distributed fixed shaft 404. The fixed shaft 404 is fixed to the middle of the top surface of the fixed disk 405 and is rotatably connected to the crank swing arm 403, transmitting the swinging power to the fixed disk 405, causing it to rotate around the eccentric axis. The fixed shaft 404 is fixedly inserted in the middle of the top surface of the fixed disk 405; The top end of each second connecting shaft 408 is fixed with a bending swing arm 407, which is fixed to the top end of the second connecting shaft 408 and is rotatably connected to the bottom surface of the fixed disk 405 through the first connecting shaft 406, thereby converting the eccentric swing of the fixed disk 405 into a rotational motion of the second connecting shaft 408, thereby realizing multi-axis synchronous rotation. The top end of each bending swing arm 407 is fixed with a first connecting shaft 406, and the top end of each first connecting shaft 406 is rotatably inserted on the bottom surface of the fixed disk 405. The top end of the first connecting shaft 406 is rotatably inserted on the bottom surface of the fixed disk 405, and the bottom end is fixed to the bending swing arm 407, thereby transmitting the swinging displacement of the fixed disk 405 to the second connecting shaft 408, thereby ensuring their synchronous rotation.

[0026] The working principle of this embodiment is as follows: when the third motor 402 is started, its output end drives the crank swing arm 403 to rotate around the axis, and the crank swing arm 403 drives the eccentric fixed disk 405 to eccentrically swing through the fixed shaft 404 inserted by rotating at the end; at the same time, the bent swing arm 407 fixed at the top of the second connecting shaft 408 is connected to the bottom surface of the fixed disk 405 by means of the first connecting shaft 406 at its top, and under the action of the eccentric swing of the fixed disk 405, the multiple second connecting shafts 408 are synchronously rotated; the second connecting shaft 408 then drives the hollow shaft 500 fixed at the bottom end to rotate together, so that the diamond grindstone 515 installed on the hollow shaft 500 reaches the speed and motion trajectory required for the grinding operation; In terms of lifting operation, after starting the second motor 303, its output end drives the lead screw 305 to rotate at high speed, and the lead screw 305 and the rectangular threaded cylinder 306 fixed in the middle of the rear side of the lifting plate 400 form a spiral transmission pair. Based on the meshing characteristics of the thread, the rotational motion of the lead screw 305 is converted into linear motion of the lifting plate 400; the fixed slide cylinders 304 on both sides of the lifting plate 400 are mounted on the fixed rod 302 to provide guidance and support for the lifting process, ensuring that the lifting plate 400 slides smoothly downward along the fixed rod 302 until the diamond grindstone 515 at the end of the hollow shaft 500 accurately reaches the flange hole processing position of the flange 102, laying the foundation for subsequent grinding operations.

[0027] Example 3: Based on Example 2, this example focuses on overcoming the technical bottleneck of the poor machining effect of the flange hole of the flange plate 102 by the diamond grindstone 515. By deeply optimizing the structure of the hollow shaft 500 and the diamond grindstone 515, while ensuring the dynamic adaptation of the grinding pressure, the grinding accuracy and processing efficiency are effectively improved, thereby achieving high-quality inner hole grinding effect. The following also includes: In the specific implementation process, Figure 8 and Figure 9 As shown, a pair of bayonet pins 513 are fixed to the middle of each inlay plate 512, and each pair of bayonet pins 513 are slidably engaged between the double-layer snap rings 510. The bayonet pins 513 are fixed to the middle of the inlay plate 512 and slidably engaged between the double-layer snap rings 510, limiting the radial movement range of the inlay plate 512 and assisting in transmitting the rotational power of the hollow shaft 500. A pair of first semicircular grooves are opened on the upper and lower sides of the outer side surface of each inlay plate 512, and a pair of second semicircular grooves are opened on the upper and lower sides of the inner side surface of each diamond grinding stone 515. The first semicircular grooves and the second semicircular grooves are closed to each other to form an annular channel. A pair of annular springs 516 are sleeved on the middle and lower part of the outer surface of the hollow shaft 500. Each annular spring 516 is sequentially inserted into the corresponding several annular channels. The annular springs 516 pass through the annular channels to provide elastic restraint, limit the outward movement distance of the diamond grinding stone 515, ensure that it maintains appropriate contact pressure with the inner wall of the flange hole, and assist in resetting under the grinding reaction force. A cavity 1 501 is provided at the top of the hollow shaft 500, and a cavity 2 502 is provided at the middle and lower part of the hollow shaft 500. A positioning slide hole 503 is provided between the cavity 1 501 and the cavity 2 502. A T-shaped slide bar 504 is inserted into the positioning slide hole 503 for sliding. A buffer spring 505 is provided on the upper half of the T-shaped slide bar 504. The buffer spring 505 buffers the movement of the T-shaped slide bar 504 by compressing and releasing elastic potential energy, thereby assisting the diamond grindstone 515 in resetting and ensuring grinding accuracy. The bottom end of the buffer spring 505 rests on the bottom wall of the first cavity 501. The positioning slide hole 503 connects the first cavity 501 with the second cavity 502, providing a sliding guide for the T-shaped slide bar 504 and transmitting the movement of the conical head to the buffer spring 505. The first cavity 501 and the second cavity 502 are the cavity structures inside the hollow shaft 500, which are used to install the T-shaped slide bar 504, the buffer spring 505, the first conical head 506, the connecting rod 507, the second conical head 508 and other components to realize the dynamic adjustment mechanism of the grinding pressure. A positioning pin hole is respectively provided on the upper and lower sides of each rectangular notch. Each positioning pin hole is distributed in a through-connected manner with the second cavity 502. A positioning pin 514 is slidably inserted into the interior of each positioning pin hole. The outer end of each positioning pin 514 is fixedly connected to the corresponding inlay plate 512. The inner end of each positioning pin 514 is in an inclined tip shape. The outer end of the positioning pin 514 is fixedly connected to the inlay plate 512, and the inner end abuts against the inclined surface of the first conical head 506 or the second conical head 508. The up and down movement of the T-shaped slide bar 504 is converted into radial movement of the inlay plate 512 through the conical surface guide, thereby realizing the extension and reset of the diamond grindstone 515. The bottom end of each T-shaped slide bar 504 is fixed with a first conical head 506, the bottom end of each first conical head 506 is fixed with a connecting rod 507, and the bottom end of each connecting rod 507 is fixed with a second conical head 508. The first conical head 506, the connecting rod 507, and the second conical head 508 located in the same cavity 2 502 are all slidably arranged with the inner wall of cavity 2 502, and the inner end of each pair of positioning pins 514 respectively rests on the first conical head 506 and the second conical head 508. The first conical head 506 and the second conical head 508 cooperate with the inner end of the positioning pin 514 through the inclined surface to convert the vertical movement of the T-shaped slide bar 504 into the radial movement of the positioning pin 514, driving the diamond grindstone 515 to extend or retract; at the same time, dynamic pressure regulation is achieved by utilizing centrifugal force and reaction force.

[0028] The working principle of this embodiment is as follows: when the hollow shaft 500 rotates, due to the dead weight and centrifugal action of the first conical head 506, the connecting rod 507, and the second conical head 508, they will be driven to slide downward in the second cavity 502, driving the T-shaped slide bar 504 to slide downward along the positioning slide hole 503, and driving the buffer spring 505 to compress and deform. The inner end of each pair of positioning pins 514 forms a limiting effect with the first conical head 506 and the second conical head 508 respectively, driving the positioning pins 514 to slide outward along the positioning pin holes, driving the inlay plate 512 and the diamond grindstone 515 to translate outward along the rectangular notch. Under the action of the contraction force of the annular spring 516, the translation distance is limited. When the diamond grindstone 515 contacts and grinds the inner wall of the flange hole, it will react, driving the inlay plate 512 and the diamond grindstone 515 to translate inward, and then driving the first conical head 506 and the second conical head 508 to reset upward through the positioning pin 514 to ensure the accuracy of the flange hole grinding.

[0029] The working principle is as follows: When the hollow shaft 500 rotates at high speed driven by the second connecting shaft 408, the first conical head 506, connecting rod 507, and second conical head 508 components installed therein slide downward along the inner wall of the second cavity 502 under the dual effects of their own gravity and centrifugal force. This movement is transmitted through the connecting rod 507, pushing the T-shaped slide bar 504 downward along the positioning slide hole 503, thereby compressing the buffer spring 505 located in the first cavity 501. At the same time, the downward movement of the T-shaped slide bar 504 drives the first conical head 506 and the second conical head 508 fixed at the bottom end thereof to descend synchronously; because the inner end of each pair of positioning pins 514 abuts against the inclined surfaces of the first conical head 506 and the second conical head 508, as the conical heads move downward, the positioning pins 514 slide outward along the positioning pin holes under the guidance of the conical surfaces; the outer end of the positioning pins 514 is fixedly connected to the inlay plate 512, thereby driving the inlay plate 512 and the diamond grindstone 515 embedded therein to translate outward along the rectangular notch on the outer surface of the hollow shaft 500; During this process, the annular spring 516 that runs through the annular channel formed by the first semicircular groove of the inlay plate 512 and the second semicircular groove of the diamond grinding stone 515 plays an elastic constraint role, limits the outward movement distance of the diamond grinding stone 515, and ensures that it maintains a moderate contact pressure with the inner wall of the flange hole; when the diamond grinding stone 515 contacts the inner wall of the flange hole and performs the grinding operation, the reaction force from the inner wall pushes the inlay plate 512 and the diamond grinding stone 515 to move inward; this reverse movement is transmitted through the positioning pin 514, pushing the first conical head 506 and the second conical head 508 to reset upward, and at the same time the buffer spring 505 releases elastic potential energy to assist in resetting; this reciprocating process effectively ensures the high precision and stability of the flange hole grinding by dynamically adjusting the contact pressure between the diamond grinding stone 515 and the inner wall of the flange hole.

[0030] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A grinding device for the inner hole surface of a flange, comprising a bottom plate (100), characterized in that: A hollow disk (101) is provided above the bottom plate (100), and three circularly distributed U-shaped brackets (103) are fixedly provided on the bottom surface of the hollow disk (101), and the bottom end of each U-shaped bracket (103) is fixedly connected to the top surface of the bottom plate (100). Concentrically distributed flanges (102) are placed on the top surface of the hollow disk (101), and the bottom plate (100) is connected to the flanges (102) via a clamping mechanism; A lifting plate (400) is provided above the flange (102), and the bottom plate (100) is connected to the lifting plate (400) via a lifting mechanism; A plurality of second connecting shafts (408) are rotatably inserted into the top surface of the lifting plate (400) and are distributed in a circular pattern. An L-shaped connecting plate (401) is fixedly provided on the top surface of the lifting plate (400). An eccentrically distributed fixed disk (405) is provided between the L-shaped connecting plate (401) and the lifting plate (400). The fixed disk (405) is connected to the plurality of second connecting shafts (408) via a transmission mechanism. A hollow shaft (500) is fixedly provided at the bottom end of each second connecting shaft (408), and the plurality of hollow shafts (500) correspond one to one with the flange holes on the flange plate (102); The middle and lower parts of the outer surface of each hollow shaft (500) are sequentially sleeved with a first clasp (509), a double-layer clasp (510), and a second clasp (511) which are concentrically fixed. The outer surface of each hollow shaft (500) is provided with a rectangular notch which passes through the first clasp (509), the double-layer clasp (510), and the second clasp (511) from top to bottom. An inlay plate (512) is slidably engaged with the interior of each rectangular notch. A diamond grinding stone (515) is inlaid and engaged with the outer side surface of each inlay plate (512). The outer side surface of the diamond grinding stone (515) is in a trapezoidal shape, and a U-shaped groove is vertically opened on the outer side surface of the diamond grinding stone (515).

2. A grinding device for the inner surface of a flange according to claim 1, characterized in that: The clamping mechanism comprises a first slide plate (203), an L-shaped connecting rod (104), and a first arc-shaped clamping plate (105); three circularly distributed first fixing plates (202) are fixed to the middle of the top surface of the bottom plate (100); a first sliding hole is provided at the top end of each of the first fixing plates (202); a first slide plate (203) is slidably inserted into the interior of each of the first sliding holes; a vertically distributed L-shaped connecting rod (104) is fixed to the middle of each of the first slide plates (203); a first arc-shaped clamping plate (105) is fixed to the top end of each of the L-shaped connecting rods (104); a plurality of uniformly distributed first anti-slip grooves are provided on the outer arc surface of each of the first arc-shaped clamping plates (105); and each of the first arc-shaped clamping plates (105) rests on the inner annular surface of the flange (102).

3. The grinding device for the inner surface of a flange according to claim 2, characterized in that: Three circularly distributed second fixing plates (205) are fixed to the periphery of the top surface of the bottom plate (100), the top end of each second fixing plate (205) is provided with a second sliding hole, the interior of each second sliding hole is slidably inserted with a second slide plate (106), the outer end of each second slide plate (106) is fixed with a U-shaped bending link (107), the two ends of each U-shaped bending link (107) are fixed with a clamping link (108), the other end of each clamping link (108) is fixed with a U-shaped ear seat, the opening of each U-shaped ear seat is provided with a movable hinged single ear seat, the other end of each single ear seat is fixed with a second arc-shaped clamping plate (109), the inner arc-shaped surface of each second arc-shaped clamping plate (109) is provided with a plurality of evenly distributed second anti-slip grooves, and each second arc-shaped clamping plate (109) is against the outer ring surface of the flange (102).

4. The grinding device for the inner surface of a flange according to claim 3, characterized in that: A first motor (200) with an output end facing upward is installed in the middle of the top surface of the bottom plate (100), a turntable (201) is fixedly provided at the output end of the first motor (200), and three elliptical pin holes distributed in a circular pattern are opened on the turntable (201), and a limiting pin shaft (204) is fixedly provided at the inner end of each of the first slide plates (203), and the bottom end of each of the limiting pin shafts (204) is slidably engaged in the corresponding elliptical pin hole.

5. The grinding device for the inner surface of a flange according to claim 4, characterized in that: Three circularly distributed linkage shafts (206) are rotatably inserted into the bottom surface of the hollow disk (101), and a double-headed hinged link (207) is fixed to the bottom end of each linkage shaft (206). The inner and outer ends of each double-headed hinged link (207) are hingedly provided with a first hinged link (209) and a second hinged link (208), respectively. The other end of each first hinged link (209) is movably hinged to the outer end of the corresponding first slide plate (203), and the other end of each second hinged link (208) is movably hinged to the inner end of the corresponding second slide plate (106).

6. The grinding device for the inner surface of a flange according to claim 5, characterized in that: The lifting mechanism includes a fixed rod (302), a lead screw (305), and a second motor (303); an extension plate (300) is fixedly provided on the back of the base plate (100); an elliptical horizontal plate (301) is provided parallel to the extension plate (300); the elliptical horizontal plate (301) is located above the lifting plate (400); a pair of fixed slides (304) are fixedly provided at the two corners of the rear side of the lifting plate (400); a fixed rod (302) is slidably inserted into the interior of each fixed slide (304); and the upper and lower ends of each fixed rod (302) are fixedly inserted on the elliptical horizontal plate (301) and the extension plate (300), respectively. A rectangular threaded barrel (306) is fixedly provided in the middle of the rear side of the lifting plate (400), and a lead screw (305) is inserted into the inner spiral of the rectangular threaded barrel (306). The upper and lower ends of the lead screw (305) are respectively rotatably inserted into the elliptical horizontal plate (301) and the extension plate (300). A second motor (303) with its output end facing downward is installed in the middle of the top surface of the elliptical horizontal plate (301), and the output end of the second motor (303) is fixedly connected to the top end of the lead screw (305).

7. The grinding device for the inner surface of a flange according to claim 6, characterized in that: The transmission mechanism comprises a third motor (402), a crank swing arm (403), and a bending swing arm (407); the front end of the L-shaped connecting plate (401) is mounted with the third motor (402) with its output end facing downward; the output end of the third motor (402) is fixedly provided with a crank swing arm (403); the other end of the crank swing arm (403) is rotatably inserted with a vertically distributed fixed shaft (404); the fixed shaft (404) is fixedly inserted in the middle of the top surface of the fixed disk (405); The top end of each second connecting shaft (408) is fixedly provided with a bending swing arm (407), the top end of each bending swing arm (407) is fixedly provided with a first connecting shaft (406), and the top end of each first connecting shaft (406) is rotatably inserted on the bottom surface of the fixed disk (405).

8. The grinding device for the inner surface of a flange according to claim 7, characterized in that: A pair of latches (513) is fixedly provided at the middle of each inlaid plate (512), and each pair of latches (513) is slidably engaged between the double-layer retaining ring (510). A pair of first semicircular grooves are provided at the upper and lower sides of the outer side surface of each inlaid plate (512), and a pair of second semicircular grooves are provided at the upper and lower sides of the inner side surface of each diamond grindstone (515), and the first semicircular grooves and the second semicircular grooves are closed to form an annular channel. A pair of annular springs (516) are sleeved at the middle and lower part of the outer surface of the hollow shaft (500), and each of the annular springs (516) is sequentially inserted into the corresponding plurality of annular channels.

9. The grinding device for the inner surface of a flange according to claim 8, characterized in that: A cavity 1 (501) is provided at the top of the hollow shaft (500), and a cavity 2 (502) is provided at the middle and lower part of the hollow shaft (500). A positioning sliding hole (503) is provided between the cavity 1 (501) and the cavity 2 (502). A T-shaped sliding rod (504) is inserted into the interior of the positioning sliding hole (503). The upper half of the T-shaped sliding rod (504) is sleeved with a buffer spring (505). The bottom end of the buffer spring (505) is against the bottom wall of the cavity 1 (501). A positioning pin hole is respectively provided on the upper and lower sides of each rectangular notch, and each positioning pin hole is distributed in a through-hole with cavity 2 (502). A positioning pin (514) is slidably inserted into the interior of each positioning pin hole, and the outer end of each positioning pin (514) is fixedly connected to the corresponding inlay plate (512), and the inner end of each positioning pin (514) is in the shape of an inclined tip.

10. The grinding device for the inner surface of a flange according to claim 9, characterized in that: The bottom end of each T-shaped slide bar (504) is fixed with a first conical head (506), the bottom end of each first conical head (506) is fixed with a connecting rod (507), and the bottom end of each connecting rod (507) is fixed with a second conical head (508). The first conical head (506), the connecting rod (507), and the second conical head (508) located in the same cavity 2 (502) are all slidably arranged with the inner wall of cavity 2 (502), and the inner end of each pair of positioning pins (514) respectively abuts against the first conical head (506) and the second conical head (508).

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