Dust-free grinding machine for grinding inner surface of metal pipe

Abstract

The invention relates to the technical field of grinding, and discloses a dust-free grinding machine for grinding the inner surface of a metal pipe, the dust-free grinding machine comprises a grinding machine body and a clamping part, the clamping part comprises two mounting plates, adjusting plates are arranged on the two mounting plates, and a clamping set and a grinding part are mounted in an area defined by the two adjusting plates; the grinding part comprises a supporting table and a grinding set installed on the supporting table, the clamping set comprises four arc-shaped plates installed between the two installation plates in a sliding mode, limiting pieces are arranged on the four arc-shaped plates, and inner supporting pieces are further installed in the limiting pieces. The dust-free grinding machine for grinding the inner surface of the metal pipe can solve the problems that in the prior art, the contact area of a three-jaw chuck and the outer wall of the metal pipe is relatively small, the limiting area of the metal pipe is limited, in the grinding process, especially during large-allowance grinding or thin-walled pipe grinding, the metal pipe is likely to shake or vibrate, and the grinding efficiency is high. And the grinding precision and the surface quality are influenced.

Description

Technical Field

[0001] The present invention relates to the technical field of grinding, and particularly relates to a dust-free grinding machine for grinding the inner surface of a metal pipe. Background Art

[0002] The grinding process of the inner surface of a metal pipe is one of the key processes in the field of precision manufacturing. By the rotation of the grinding wheel spindle and the planetary motion, combined with the low-speed rotation of the workpiece, the grinding of the inner hole is achieved. During the grinding process of the inner surface of the metal pipe, the stable clamping of the workpiece is the key factor to ensure the machining accuracy and surface quality. In the prior art, a three-jaw chuck is usually used to limit and clamp the metal pipe, and the positioning and clamping of the workpiece are achieved through the synchronous radial movement of the three jaws.

[0003] Although the application of the three-jaw chuck is relatively common, there are still certain problems. The contact area between the three-jaw chuck and the outer wall of the metal pipe is relatively small, and the limiting area for the metal pipe is limited. During the grinding process, especially when performing large-allowance grinding or thin-wall pipe grinding, it is easy to cause the metal pipe to shake or vibrate, affecting the grinding accuracy and surface quality. Summary of the Invention

[0004] Aiming at the above-mentioned drawbacks of the prior art, the present invention provides a dust-free grinding machine for grinding the inner surface of a metal pipe, which can effectively solve the problems in the prior art that the contact area between the three-jaw chuck and the outer wall of the metal pipe is relatively small, the limiting area for the metal pipe is limited, and during the grinding process, especially when performing large-allowance grinding or thin-wall pipe grinding, it is easy to cause the metal pipe to shake or vibrate, affecting the grinding accuracy and surface quality.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions:

[0006] The present invention provides a dust-free grinding machine for grinding the inner surface of a metal pipe, including:

[0007] A grinding machine body;

[0008] A clamping part, the clamping part includes two inverted T-shaped mounting plates, and on the side walls of the two mounting plates close to each other, adjusting plates with four arc-shaped grooves opened along the circumferential direction at the end faces are respectively rotatably mounted, and a clamping group is mounted in the area surrounded by the two adjusting plates;

[0009] A grinding part, the grinding part includes a support table and a grinding group mounted on the support table;

[0010] Wherein, the two mounting plates and the support table are all slidably mounted on the guide rails in the grinding machine body through electric sliders;

[0011] Among them, the clamping group includes four arc-shaped plates arranged circumferentially and slidably installed between two mounting plates. Limiting members are provided on the arc-shaped inner walls of the four arc-shaped plates, and inner support members are also installed inside the limiting members.

[0012] Furthermore, on the side walls of the two mounting plates close to each other, waist-shaped sliding grooves are respectively opened at positions corresponding to their respective four arc-shaped grooves. Linking rods fixedly connected to the corresponding arc-shaped plates are slidably arranged inside the waist-shaped sliding grooves. An avoidance groove facilitating the entry of the metal tube is also opened at the central position of the end face of the front mounting plate.

[0013] Furthermore, a number of cooperation groups are fixedly arranged on the arc-shaped inner wall of the arc-shaped plate in the front-back direction. Each cooperation group includes three cooperation blocks fixedly arranged on the arc-shaped inner wall of the arc-shaped plate. T-shaped blocks with two mounting grooves are fixedly installed on the front and back sides of a number of cooperation blocks located in the middle on the arc-shaped inner wall of the arc-shaped plate.

[0014] Furthermore, the limiting member includes four arc-shaped clamping plates installed corresponding to the arc-shaped plates. A number of arc-shaped sliding grooves are opened on the arc-shaped outer wall of the arc-shaped clamping plate in the front-back direction. Two U-shaped sliders are slidably arranged inside the arc-shaped sliding grooves. A rectangular through groove corresponding to the position of the T-shaped block is opened between the two U-shaped sliders on the arc-shaped sliding groove. Waist-shaped plates respectively rotatably connected to the two mounting grooves of the T-shaped block are respectively arranged on the two U-shaped sliders. Connecting group one and connecting group two respectively sliding through the arc-shaped clamping plate are arranged at the ends of the arc-shaped sliding groove far away from each other. Connecting group one includes two inverted U-shaped magnets arranged in the front-back direction. Connecting group two includes two T-shaped magnets arranged in the front-back direction.

[0015] Furthermore, a cooperation groove is also opened on the arc-shaped outer wall of the arc-shaped clamping plate and between adjacent two arc-shaped sliding grooves. An arc-shaped through groove corresponding to the position of the cooperation block is opened on the inner wall of the cooperation groove. Springs are fixedly connected to the inner wall of the arc-shaped plate between adjacent two arc-shaped through grooves on the arc-shaped clamping plate.

[0016] Furthermore, the inner support member includes four arc-shaped support plates arranged circumferentially and connected to an external support device through torsion springs. Wedge-shaped blocks are respectively fixedly arranged on the arc-shaped inner walls of the four arc-shaped support plates. A number of arc-shaped rollers are rotatably installed in the front-back direction inside the sliding grooves opened on the arc-shaped outer walls of the four arc-shaped support plates. Arc-shaped support pieces, the end faces of which are provided with avoidance through grooves corresponding to the positions of the arc-shaped rollers and can be used to support the inner wall of the metal tube, are slidably installed inside the sliding grooves through springs.

[0017] Furthermore, four rectangular sliding grooves communicating with the corresponding waist-shaped sliding grooves are also opened on the front side wall of the front mounting plate in the circumferential direction. Elastic pieces in an inverted L shape, which can be used to block the front side wall of the metal tube, are slidably installed inside the rectangular sliding grooves.

[0018] Further, the grinding group includes a connecting rod fixedly connected to the output shaft of an external driving motor and a grinding head fixedly installed at the other end of the connecting rod. A conical rod cooperating with the four wedge-shaped blocks is rotatably provided at one end of the grinding head away from the connecting rod. An auxiliary member for auxiliary support of the inner wall of the metal pipe is further provided on the outer wall of the connecting rod.

[0019] Further, the auxiliary member includes an annular ring sleeved on the outer wall of the connecting rod. Four installation chutes are opened on the outer wall of the annular ring along the circumferential direction. Bar-shaped sliders are slidably arranged inside the four installation chutes. Both ends of the bar-shaped sliders are fixedly connected to the inner wall of the installation chutes through springs. Arc-shaped auxiliary plates are also installed on the outer wall of the annular ring corresponding to the positions of the four bar-shaped sliders through torsion springs. A linkage plate is arranged between the arc-shaped auxiliary plates and the bar-shaped sliders, and both ends of the linkage plate are respectively rotatably connected to the arc-shaped auxiliary plates and the bar-shaped sliders.

[0020] The technical solution provided by the present invention has the following beneficial effects compared with the prior art:

[0021] The present invention is provided with a clamping member and a limiting member. During the movement of the arc-shaped plate, the U-shaped slider is continuously pushed along the arc-shaped chute through the waist-shaped plate. When the two U-shaped sliders inside the same arc-shaped chute move to the farthest end, the two U-shaped sliders will respectively push the corresponding inverted U-shaped magnet and T-shaped magnet to move outside the arc-shaped clamping plate, and the magnetic attraction fixation work with adjacent magnets is completed through two magnets with different shapes on the same arc-shaped clamping plate, and the adjacent arc-shaped clamping plates are connected by the magnets to form a clamping and limiting working annular sleeve for the outer wall of the metal pipe. The annular sleeve is used to realize the clamping and limiting function for the outer wall of the metal pipe. Through its annular structural design, the clamping force can be evenly dispersed along the circumferential direction and act on the outer wall of the metal pipe, avoiding the phenomenon of outer wall clamping injury caused by excessive local pressure on one side of the outer wall of the metal pipe. By optimizing the contact area and pressure distribution between the sleeve and the outer wall of the metal pipe, it is ensured that when the metal pipe is subjected to clamping and limiting, the force received by its outer wall is uniform and controlled, thereby effectively protecting the integrity and safety of the outer wall of the metal pipe. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the present invention;

[0024] Figure 2 It is a three-dimensional structural schematic diagram of the clamping part of an embodiment of the present invention;

[0025] Figure 3 For the embodiment of the present invention Figure 2 The structural schematic diagram of the partial enlargement at position A in it;

[0026] Figure 4 The three-dimensional separated structural schematic diagram of the mounting plate and the adjusting plate in the embodiment of the present invention;

[0027] Figure 5 The three-dimensional structural schematic diagram of the mounting plate and the adjusting plate in the embodiment of the present invention;

[0028] Figure 6 The three-dimensional separated structural schematic diagram of the partial structure of the clamping group in the embodiment of the present invention;

[0029] Figure 7 For the embodiment of the present invention Figure 6 The structural schematic diagram of the partial enlargement at position B in it;

[0030] Figure 8 The three-dimensional structural schematic diagram of the arc plate in the embodiment of the present invention;

[0031] Figure 9 The three-dimensional separated structural schematic diagram of the limiting member in the embodiment of the present invention;

[0032] Figure 10 The three-dimensional separated structural schematic diagram of the inner support member in the embodiment of the present invention;

[0033] Figure 11 The three-dimensional separated structural schematic diagram of the grinding group in the embodiment of the present invention;

[0034] Figure 12 The structural schematic diagram of the state transformation of the clamping part in the embodiment of the present invention.

[0035] The reference numerals in the figure respectively represent: 1, grinding machine body; 2, clamping part; 21, mounting plate; 211, waist-shaped sliding groove; 212, linkage rod; 213, elastic sheet; 22, adjusting plate; 221, arc-shaped groove; 23, clamping group; 231, arc plate; 2311, fitting block; 2312, T-shaped block; 232, limiting member; 2321, arc-shaped clamping plate; 23211, arc-shaped sliding groove; 23212, fitting groove; 2322, U-shaped slider; 2323, waist-shaped plate; 2324, inverted U-shaped magnet; 2325, T-shaped magnet; 233, inner support member; 2331, arc-shaped support plate; 2332, wedge block; 2333, arc-shaped roller; 2334, arc-shaped support piece; 3, grinding part; 31, support table; 32, grinding group; 321, grinding head; 322, conical rod; 323, auxiliary member; 3231, annular ring; 3232, strip-shaped slider; 3233, arc-shaped auxiliary plate; 3234, linkage plate. Detailed implementation manners

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the protection scope of the present invention.

[0037] The present invention will be further described below in conjunction with embodiments.

[0038] Embodiment:

[0039] Please refer to Figures 1 - 12 , the present invention provides a technical solution: a dust-free grinding machine for the inner surface grinding of metal pipes, including:

[0040] A grinding machine body 1;

[0041] A clamping part 2, the clamping part 2 includes two inverted T-shaped mounting plates 21. On the side walls of the two mounting plates 21 close to each other, adjusting plates 22 with four arc-shaped grooves 221 opened along the circumferential direction at the end faces are respectively rotatably mounted. A clamping group 23 is installed in the area surrounded by the two adjusting plates 22;

[0042] A grinding part 3, the grinding part 3 includes a support table 31 and a grinding group 32 installed on the support table 31;

[0043] Among them, the two mounting plates 21 and the support table 31 are all slidably mounted on the guide rails in the grinding machine body 1 through electric sliders;

[0044] Among them, the clamping group 23 includes four arc-shaped plates 231 arranged along the circumferential direction and slidably mounted between the two mounting plates 21. Limiting members 232 are arranged on the arc-shaped inner walls of the four arc-shaped plates 231, and inner support members 233 are also installed inside the limiting members 232.

[0045] On the side walls of the two mounting plates 21 close to each other, waist-shaped sliding grooves 211 are respectively opened at positions corresponding to the four arc-shaped grooves 221 of each. Linking rods 212 fixedly connected to the corresponding arc-shaped plates 231 are slidably arranged inside the waist-shaped sliding grooves 211. An avoidance groove for the entry of metal pipes is also opened at the center position of the end face of the front mounting plate 21.

[0046] A plurality of cooperation groups are fixedly arranged on the arc-shaped inner wall of the arc-shaped plate 231 along the front-back direction. Each cooperation group includes three cooperation blocks 2311 fixedly arranged on the arc-shaped inner wall of the arc-shaped plate 231. T-shaped blocks 2312 with two mounting grooves opened are respectively fixedly installed on the front and back sides of a plurality of cooperation blocks 2311 in the middle of the arc-shaped inner wall of the arc-shaped plate 231.

[0047] The limiting member 232 includes four arc-shaped clamping plates 2321 installed corresponding to the positions of the arc-shaped plates 231. A number of arc-shaped sliding grooves 23211 are formed in the arc-shaped outer wall of the arc-shaped clamping plate 2321 in the front-rear direction. Two U-shaped sliders 2322 are slidably arranged inside the arc-shaped sliding grooves 23211. A rectangular through groove is formed in the arc-shaped sliding groove 23211 at the position corresponding to the T-shaped block 2312 between the two U-shaped sliders 2322. Two U-shaped sliders 2322 are respectively rotatably connected with waist-shaped plates 2323 hinged to the two installation grooves of the T-shaped block 2312. One end far away from each other of the arc-shaped sliding grooves 23211 is respectively provided with a first connection group and a second connection group that slidably penetrate through the arc-shaped clamping plate 2321. The first connection group includes two inverted U-shaped magnets 2324 arranged in the front-rear direction, and the second connection group includes two T-shaped magnets 2325 arranged in the front-rear direction.

[0048] An engaging groove 23212 is further formed in the arc-shaped outer wall of the arc-shaped clamping plate 2321 between two adjacent arc-shaped sliding grooves 23211. An arc-shaped through groove is formed in the inner wall of the engaging groove 23212 at the position corresponding to the engaging block 2311. Between two adjacent arc-shaped through grooves on the arc-shaped clamping plate 2321, they are fixedly connected to the inner wall of the arc-shaped plate 231 through springs.

[0049] The inner support member 233 includes four arc-shaped support plates 2331 arranged along the circumferential direction and connected to an external support device through torsion springs. Wedge-shaped blocks 2332 are respectively fixedly arranged on the arc-shaped inner walls of the four arc-shaped support plates 2331. A sliding groove is formed in the arc-shaped outer wall of each of the four arc-shaped support plates 2331 in the front-rear direction. A number of arc-shaped rollers 2333 are rotatably installed in the sliding groove in the front-rear direction. An arc-shaped support piece 2334, whose end face is provided with an avoidance through groove corresponding to the position of the arc-shaped roller 2333 and can be used to support the inner wall of the metal pipe, is slidably installed in the sliding groove through a spring.

[0050] Four rectangular sliding grooves communicating with the corresponding waist-shaped sliding grooves 211 are further formed in the front side wall of the front side mounting plate 21 in the circumferential direction. An elastic piece 213, which can be used to block the front side wall of the metal pipe and has an inverted L shape, is slidably installed inside the rectangular sliding groove.

[0051] The grinding group 32 includes a connecting rod fixedly connected to the output shaft of an external driving motor and a grinding head 321 fixedly installed at the other end of the connecting rod. A tapered rod 322 cooperating with the four wedge-shaped blocks 2332 is rotatably arranged at the end of the grinding head 321 far away from the connecting rod. An auxiliary member 323, which can be used to assist in supporting the inner wall of the metal pipe, is further arranged on the outer wall of the connecting rod.

[0052] The auxiliary part 323 includes an annular ring 3231 sleeved on the outer wall of the connecting rod. Four installation chutes are opened on the outer wall of the annular ring 3231 along the circumferential direction. A strip-shaped slider 3232 is slidably arranged inside each of the four installation chutes. Both ends of the strip-shaped slider 3232 are fixedly connected to the inner wall of the installation chute through springs. An arc-shaped auxiliary plate 3233 is also installed on the outer wall of the annular ring 3231 corresponding to the positions of the four strip-shaped sliders 3232 through torsion springs. A linkage plate 3234 is arranged between the arc-shaped auxiliary plate 3233 and the strip-shaped slider 3232, and both ends of the linkage plate 3234 are rotatably connected to the arc-shaped auxiliary plate 3233 and the strip-shaped slider 3232 respectively.

[0053] During specific operation, the installation of the metal pipe and the limiting work on its outer wall:

[0054] When the inner wall of the metal pipe needs to be ground, first, the electric slider drives the two installation plates 21 and the grinding head 321 to move away synchronously, and during the moving-away process, ensure that the distance between the installation plate 21 and the grinding head 321 will not block the installation of the metal pipe.

[0055] Subsequently, the metal pipe to be processed is pushed in along the avoidance groove manually, and the metal pipe is initially sleeved on the outer walls of the four arc-shaped supporting plates 2331 until the end face of the metal pipe fits with the end face of the adjusting plate 22 (in the initial state, due to the inner wall of the metal pipe not being ground, its inner diameter size has deviations and the surface roughness of the inner wall is relatively high. When the metal pipe is pushed manually, a number of arc-shaped rollers 2333 arranged in the chute will always be in close contact with the inner wall of the metal pipe). The rotational design of the arc-shaped roller 2333 aims to reduce the frictional resistance between the metal pipe and the arc-shaped supporting piece 2334 during the moving process, thereby improving the movement smoothness of the metal pipe when it is pushed into the arc-shaped plate 231, effectively reducing the friction coefficient, and ensuring the smoothness and efficiency of the metal pipe during the pushing process.

[0056] After the metal pipe moves to the working position, first control the external motor to drive the front and rear adjusting plates 22 to rotate synchronously. During the rotation of the two adjusting plates 22, the four arc-shaped grooves 221 opened on them move synchronously and respectively push against the corresponding linkage rods 212 (since the linkage rods 212 are always slidably arranged in the waist-shaped chutes 211 of the installation plates 21, when the adjusting plate 22 rotates, its arc-shaped groove 221 will push the linkage rod 212 to slide along the waist-shaped chute 211. At the same time, because the four arc-shaped grooves 221 are arranged in the circumferential direction, the synchronous approach of the four linkage rods 212 can be completed through the single rotation of the adjusting plate 22). The linkage rods 212 arranged on the two installation plates 21 drive the four arc-shaped plates 231 to move during the synchronous movement process, and during the gradual movement process, the arc-shaped clamping plates 2321 on the four arc-shaped plates 231 are made to fit with the outer wall of the metal pipe.

[0057] When the four arc-shaped clamping plates 2321 are in contact with the outer wall of the metal pipe, continue to drive the two adjusting plates 22 to rotate. At this time, the four linkage rods 212 continue to move closer synchronously under the pushing action of the corresponding arc-shaped grooves 221 (since a number of arc-shaped sliding grooves 23211 are provided on the arc-shaped outer wall of the arc-shaped clamping plate 2321, and two U-shaped sliders 2322 hinged to the T-shaped block 2312 through the waist-shaped plates 2323 are slidably installed inside a number of arc-shaped sliding grooves 23211. Therefore, after the arc-shaped inner wall of the arc-shaped clamping plate 2321 is in contact with the outer wall of the metal pipe, during the continuous movement of the arc-shaped plate 231, it will push the corresponding U-shaped slider 2322 to slide along the arc-shaped sliding groove 23211 through the two waist-shaped plates 2323, thereby changing the angle between the waist-shaped plate 2323 and the arc-shaped clamping plate 2321 to adapt to the approach of the arc-shaped plate 231. And a rectangular through groove is also provided on the arc-shaped sliding groove 23211, the purpose of which is to prevent the T-shaped block 2312 from contacting and interfering with the arc-shaped clamping plate 2321 during the downward movement). As the arc-shaped plate 231 and the arc-shaped clamping plate 2321 are fitted and attached to each other, a number of fitting blocks 2311 provided on the inner wall of the arc-shaped plate 231 pass through the arc-shaped through groove and are in contact with the outer wall of the metal pipe during the gradual movement.

[0058] Meanwhile, during the movement of the arc-shaped plate 231, it continuously pushes the U-shaped slider 2322 to slide along the arc-shaped sliding groove 23211 through the waist-shaped plate 2323. When the two U-shaped sliders 2322 inside the same arc-shaped sliding groove 23211 move to the farthest ends, the two U-shaped sliders 2322 will respectively push the corresponding inverted U-shaped magnet 2324 and the T-shaped magnet 2325 to move outside the arc-shaped clamping plate 2321, and complete the magnetic attraction and fixation work with the adjacent magnets through the two magnets with different shapes on the same arc-shaped clamping plate 2321 (an inverted U-shaped magnet and a T-shaped magnet are respectively installed at the far ends of the arc-shaped sliding grooves 23211 on each arc-shaped clamping plate 2321 that are away from each other. When the waist-shaped plate 2323 pushes out the two magnets with different shapes through the U-shaped slider 2322, electromagnetic fixation is completed through the adjacent inverted U-shaped magnet 2324 and the T-shaped magnet 2325 with matching shapes, and the adjacent arc-shaped clamping plates 2321 are connected by the magnets to form a clamping and limiting working annular sleeve for the outer wall of the metal pipe). The annular sleeve is used to realize the clamping and limiting function for the outer wall of the metal pipe. Through its annular structural design, the clamping force can be evenly dispersed along the circumferential direction and act on the outer wall of the metal pipe, avoiding the phenomenon of outer wall clamping injury caused by excessive local pressure on the outer wall of the single-sided metal pipe. By optimizing the contact area and pressure distribution between the sleeve and the outer wall of the metal pipe, it is ensured that when the metal pipe is clamped and limited, the force on its outer wall is uniform and controlled, thereby effectively protecting the integrity and safety of the outer wall of the metal pipe.

[0059] It should be noted that between two adjacent arc-shaped through grooves on the arc-shaped clamping plate 2321, a fixed connection is achieved with the inner wall of the arc-shaped plate 231 through a spring. The purpose of this design is to utilize the elastic buffering characteristics of the spring to avoid direct rigid contact between the arc-shaped clamping plate 2321 and the arc-shaped plate 231, and to prevent the rigid contact from causing vibration and damage to the metal pipe. By introducing the spring as an elastic connection element, the impact force generated during the contact process can be effectively absorbed and attenuated, thereby protecting the metal pipe from vibration and potential mechanical damage. At the same time, the elastic characteristics of the spring can also compensate for the dimensional inconsistency caused by manufacturing or assembly errors to a certain extent, ensuring stable and reliable contact between the clamping plate and the metal pipe.

[0060] Under the rotation and pushing action of the front-end adjusting plate 22, the four linkage rods 212 achieve synchronous approaching movements. This linkage mechanism further drives the corresponding elastic pieces 213 inside the rectangular chute to approach synchronously. During the movement of the four elastic pieces 213, their spring ends can adaptively press against the front side wall of the metal pipe. Through this coordinated limiting effect in the circumferential direction and the front-back direction, the stability of the metal pipe during the subsequent grinding process is ensured, effectively avoiding the vibration phenomenon of the metal pipe caused by the grinding force, and thus preventing the occurrence of grinding size deviation problems.

[0061] Inner support of the inner wall of the metal pipe and grinding work:

[0062] After completing the limiting work on the outer wall of the metal pipe, first control the electric slider to drive the support table 31 to move along the guide rail, and make the connecting rod drive the grinding head 321 and the conical rod 322 to enter the inner wall of the metal pipe. As the conical rod 322 is pushed, the four wedge blocks 2332 drive the arc-shaped support plate 2331 to expand synchronously and realize the inner support work on the inner wall of the metal pipe (in the initial state, the metal pipe is sleeved on the outer walls of the arc-shaped support plate 2331 and the arc-shaped support piece 2334. After the arc-shaped clamping plate 2321 and the arc-shaped plate 231 complete the limiting work on the outer wall of the metal pipe, the metal pipe is supported and separated from the contact with the arc-shaped support plate 2331 and the arc-shaped support piece 2334. After the conical rod 322 enters the inside of the arc-shaped support plate 2331, through its inclined outer wall, it realizes the synchronous pushing work on the wedge block 2332, and makes the four wedge blocks 2332 drive the arc-shaped support plate 2331 to expand synchronously. Since the arc-shaped support piece 2334 and the arc-shaped support plate 2331 are connected by a spring, the arc-shaped support piece 2334 first contacts the inner wall of the metal pipe and then gradually enters the chute under the reaction force and fits with the inner wall of the chute), the electric slider drives the conical rod 322 to move axially, and realizes the uniform support of the inner wall of the metal pipe by controlling the movement of the conical rod 322, avoiding deformation caused by insufficient rigidity or excessive supporting force, and cooperating with the four wedge blocks 2332 to realize the supporting effect on the inner wall of the metal pipe. Combined with the arc-shaped clamping plate 2321 and the elastic piece 213, a coordinated limiting and supporting mechanism for different directions inside and outside the metal pipe is formed, ensuring the stability of the metal pipe during the grinding process, effectively suppressing the generation of vibrations in all directions, preventing problems such as grinding size deviation and increased surface roughness caused by vibrations, and finally ensuring the high quality and high efficiency of the inner wall grinding process of the metal pipe.

[0063] Then, the driving motor drives the grinding head 321 to rotate through the connecting rod. During the rotation of the grinding head 321, the grinding work on the inner wall of the metal pipe is realized through the outer wall of its grinding wheel. After the grinding at the initial position is completed, control the electric slider to drive the two mounting plates 21 to slide forward synchronously. At this time, the metal pipe held and limited also moves synchronously during the movement of the two mounting plates 21, thereby changing the working position of the grinding head 321 (since the inner support member 233 is connected to the external support device, when the two mounting plates 21 are moving, the arc-shaped support plate 2331 and the arc-shaped support piece 2334 do not move). A number of arc-shaped rollers 2333 rotatably installed inside the chute of the arc-shaped support plate 2331 can reduce the friction between the metal pipe and the arc-shaped support piece 2334 during the movement of the metal pipe, thereby improving the smoothness of the metal pipe movement work.

[0064] As the two mounting plates 21 drive the metal tube to move and the grinding head 321 enters the interior of the metal tube, the arc-shaped auxiliary plate 3233 is blocked and pushed by the elastic piece 213 inside the rectangular chute (the four arc-shaped auxiliary plates 3233 are installed on the outer wall of the annular ring 3231 through torsion springs, and the four arc-shaped auxiliary plates 3233 are inclined, that is, the height of the arc-shaped auxiliary plate 3233 gradually increases from front to back. Since the arc-shaped auxiliary plate 3233 and the strip-shaped slider 3232 are connected by a linkage plate 3234, and the length of the linkage plate 3234 is constant, when the arc-shaped auxiliary plate 3233 approaches the annular ring 3231, the linkage rod 212 will drive the strip-shaped slider 3232 to slide along its installation chute to adapt to the change in the distance between the arc-shaped auxiliary plate 3233 and the strip-shaped slider 3232. The spring devices arranged at both ends of the strip-shaped slider 3232 are designed to ensure that when the linkage rod 212 is displaced, the reaction forces of the two side springs can be transmitted through the linkage rod 212 to continuously push the arc-shaped auxiliary plate 3233 to a proper position. This design realizes the self-adaptive internal support function for the inner wall of the metal tube that has completed the grinding process. By the stiffness and pre-tightening force of the springs, the magnitude and direction of the internal support force are ensured, and the self-adaptive adjustment is realized according to the actual shape and size of the inner wall of the metal tube, so as to provide a stable and uniform support force, prevent the deformed inner wall after grinding from deforming due to its own weight or external disturbance, and ensure the stability of the accuracy and quality after grinding), and the force that the arc-shaped auxiliary plate 3233 is pushed by gradually approaches the annular ring 3231 until the arc-shaped auxiliary plate 3233 is pushed into the interior of the metal tube. Finally, the unobstructed grinding head 321 continuously changes its grinding position under the movement of the metal tube, and the grinding of the inner wall of the metal tube is completed by the rotating grinding head 321.

[0065] It should be noted that when the grinding operation is in progress, the conical rod 322 applies a thrust to the wedge block 2332, and then the arc-shaped support piece 2334 and the arc-shaped roller 2333 are closely attached to the inner wall of the metal tube in the unground area. This design ensures the stability of the unground metal tube during the processing. At the same time, as the grinding head 321 adjusts its grinding position, the elastic piece 213 pushes and presses the arc-shaped auxiliary plate 3233 to adaptively adhere to the inner wall of the metal tube in the area that has been ground. Through the two different internal support structures before and after, the inner wall of the metal tube in different areas is supported respectively, effectively avoiding the vibration phenomenon caused by uneven force during the grinding operation of the metal tube, thus significantly improving the stability of the metal tube grinding process and ensuring the grinding accuracy and surface quality.

[0066] The wedge block 2332 is pushed by the conical rod 322 during the grinding operation, so that it is always in close contact with the conical rod 322. In the external support device, there is also a lubrication device (not shown in the attached drawings of the specification) passing through the inside of the arc-shaped support plate 2331. The cutting fluid is sprayed through the lubrication device to lubricate and cool the metal pipe and the grinding head 321. At the same time, the cutting fluid can also wash away the chips generated by grinding, preventing the chips from clogging the grinding wheel and affecting the grinding quality and efficiency.

[0067] It should be emphasized that the dust-free grinding machine for the inner surface grinding of metal pipes has the following advantages:

[0068] Advantage 1: During the movement of the arc-shaped plate 231, the U-shaped slider 2322 is continuously pushed along the arc-shaped sliding groove 23211 by the waist-shaped plate 2323. When the two U-shaped sliders 2322 inside the same arc-shaped sliding groove 23211 move to the farthest end, the two U-shaped sliders 2322 will respectively push the corresponding inverted U-shaped magnet 2324 and T-shaped magnet 2325 to move outside the arc-shaped clamping plate 2321, and complete the magnetic attraction fixation work with the adjacent magnets through the two magnets with different shapes on the same arc-shaped clamping plate 2321, and make the adjacent arc-shaped clamping plates 2321 form a clamping and limiting working annular sleeve for the outer wall of the metal pipe under the connection of the magnets. The annular sleeve is used to realize the clamping and limiting function of the outer wall of the metal pipe. Through its annular structure design, the clamping force can be evenly dispersed along the circumferential direction and act on the outer wall of the metal pipe, avoiding the phenomenon of outer wall clamping caused by excessive local pressure on the single-sided outer wall of the metal pipe. By optimizing the contact area and pressure distribution between the sleeve and the outer wall of the metal pipe, it is ensured that when the metal pipe is clamped and limited, the force received by its outer wall is uniform and controlled, thus effectively protecting the integrity and safety of the outer wall of the metal pipe.

[0069] Advantage 2: Under the rotation and pushing action of the front-end adjusting plate 22, the four linkage rods 212 achieve synchronous approaching movements. This linkage mechanism further drives the corresponding elastic pieces 213 inside the rectangular sliding groove to approach synchronously. During the movement of the four elastic pieces 213, their spring ends can adaptively press against the front side wall of the metal pipe. Through this circumferential and front-back direction collaborative limiting effect, the stability of the metal pipe during the subsequent grinding process is ensured, effectively avoiding the vibration phenomenon of the metal pipe caused by the grinding force, and thus preventing the occurrence of grinding size deviation problems.

[0070] Advantage 3: The electric slider drives the conical rod 322 to move axially. By controlling the movement of the conical rod 322, uniform support for the inner wall of the metal tube is achieved, avoiding deformation caused by insufficient rigidity or excessive supporting force. In cooperation with the four wedge blocks 2332, the supporting effect on the inner wall of the metal tube is realized. Combined with the arc-shaped clamping plate 2321 and the elastic sheet 213, a cooperative limiting and supporting mechanism for different directions inside and outside the metal tube is formed, ensuring the stability of the metal tube during the grinding process, effectively suppressing the generation of vibrations in all directions, and preventing problems such as grinding size deviation and increased surface roughness caused by vibrations. Ultimately, high-quality and high-efficiency inner wall grinding of the metal tube is ensured.

[0071] Advantage 4: When the grinding operation is carried out, the conical rod 322 exerts a thrust on the wedge block 2332, thereby enabling the arc-shaped support piece 2334 and the arc-shaped roller 2333 to closely fit the inner wall of the unground metal tube. This design ensures the stability of the unground metal tube during the processing. At the same time, as the grinding head 321 adjusts its grinding position, the elastic sheet 213 pushes the arc-shaped auxiliary plate 3233 and makes it adaptively close to the inner wall of the metal tube in the already ground area. By means of two different inner support structures before and after, the inner wall of the metal tube in different areas is respectively supported, effectively avoiding the vibration phenomenon caused by uneven force on the metal tube during the grinding operation, thus significantly improving the stability of the metal tube grinding process and ensuring the grinding accuracy and surface quality.

[0072] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A dust-free grinder for grinding the inner surface of a metal tube, characterized in that: include: Grinding machine body (1); A clamping portion (2), the clamping portion (2) comprising two mounting plates (21) in an inverted T-shape, an adjusting plate (22) having four arc-shaped grooves (221) formed on the end surface along the circumferential direction being rotatably mounted on adjacent side walls of the two mounting plates (21), and a clamping group (23) being mounted in the area enclosed by the two adjusting plates (22); A grinding section (3), the grinding section (3) comprising a support platform (31) and a grinding group (32) mounted on the support platform (31); The two mounting plates (21) and the support platform (31) are both slidably mounted on the guide rails in the grinding machine body (1) via an electric slider; The clamping group (23) comprises four arc-shaped plates (231) arranged along the circumferential direction and slidably mounted between two mounting plates (21); the arc-shaped inner walls of the four arc-shaped plates (231) are all provided with limiting members (232); and the inner part of the limiting member (232) is also provided with an inner support member (233).

2. A dust-free grinder for inner surface grinding of metal pipes according to claim 1, characterized in that: A waist-shaped sliding groove (211) is provided on one side wall adjacent to the two mounting plates (21) at positions corresponding to the four arc-shaped grooves (221) respectively; a linkage rod (212) fixedly connected to the corresponding arc-shaped plate (231) is slidably arranged inside the waist-shaped sliding groove (211); and an avoidance groove for facilitating the entry of a metal pipe is also provided at the center of the end surface of the front mounting plate (21).

3. A dust-free grinder for inner surface grinding of metal pipes according to claim 1, characterized in that: The arc-shaped inner wall of the arc-shaped plate (231) is fixedly provided with a plurality of matching groups along the front-to-back direction, and each matching group comprises three matching blocks (2311) fixedly provided on the arc-shaped inner wall of the arc-shaped plate (231). The arc-shaped inner wall of the arc-shaped plate (231) and the front and rear sides of a plurality of matching blocks (2311) located in the middle are respectively fixedly provided with T-shaped blocks (2312) with two mounting grooves.

4. A dust-free grinder for inner surface grinding of metal pipes according to claim 3, characterized in that: The limiting member (232) comprises four arc-shaped engaging plates (2321) installed at positions corresponding to the arc-shaped plates (231); the arc-shaped outer wall of the arc-shaped engaging plate (2321) is provided with a plurality of arc-shaped sliding grooves (23211) along the front-back direction; two U-shaped sliding blocks (2322) are slidably arranged inside the arc-shaped sliding groove (23211); a T-shaped block (2312) is provided on the arc-shaped sliding groove (23211) and located between the two U-shaped sliding blocks (2322). A rectangular through groove is provided, and the two U-shaped sliders (2322) are respectively rotatably connected to a waist plate (2323) hinged to two mounting grooves of the T-shaped block (2312); the ends away from the arc-shaped slide groove (23211) are respectively provided with a connection group 1 and a connection group 2 sliding through the arc-shaped engaging plate (2321); the connection group 1 includes two inverted U-shaped magnetic blocks (2324) arranged along the front-back direction, and the connection group 2 includes two T-shaped magnetic blocks (2325) arranged along the front-back direction.

5. A dust-free grinder for inner surface grinding of metal pipes according to claim 4, characterized in that: The arc-shaped outer wall of the arc-shaped engaging plate (2321) is provided with a matching groove (23212) between two adjacent arc-shaped sliding grooves (23211); the inner wall of the matching groove (23212) is provided with an arc-shaped through groove at a position corresponding to the matching block (2311); and the two adjacent arc-shaped through grooves on the arc-shaped engaging plate (2321) are fixedly connected to the inner wall of the arc-shaped plate (231) via a spring.

6. The dust-free grinder for inner surface grinding of metal pipes according to claim 1, characterized in that: The inner support member (233) includes four arc-shaped support plates (2331) arranged in a circumferential direction and connected to an external support device through a torsion spring, the arc-shaped inner walls of the four arc-shaped support plates (2331) are respectively fixedly provided with wedge blocks (2332), the arc-shaped outer walls of the four arc-shaped support plates (2331) are all provided with slide grooves along the front-to-back direction, a plurality of arc-shaped rollers (2333) are rotatably installed inside the slide groove along the front-to-back direction, and an arc-shaped support sheet (2334) is slidably installed inside the slide groove through a spring, and the end surface of the arc-shaped roller (2333) is provided with an avoidance groove and can be used to support the inner wall of the metal tube.

7. A dust-free grinder for inner surface grinding of metal pipes according to claim 2, characterized in that: The front side wall of the front mounting plate (21) is also provided with four rectangular slide grooves in the circumferential direction and connected with the corresponding waist-shaped slide grooves (211); a spring piece (213) in an inverted L shape and capable of blocking the front side wall of the metal tube is slidably installed inside the rectangular slide groove.

8. The dust-free grinder for inner surface grinding of metal pipes according to claim 1, characterized in that: The grinding group (32) includes a connecting rod fixedly connected to the output shaft of an external driving motor and a grinding head (321) fixedly installed at the other end of the connecting rod. The grinding head (321) is rotatably arranged at one end away from the connecting rod and is provided with a conical rod (322) matched with four wedge blocks (2332). The outer wall of the connecting rod is also provided with an auxiliary part (323) that can be used to assist in supporting the inner wall of the metal pipe.

9. A dust-free grinder for inner surface grinding of metal pipes according to claim 8, characterized in that: The auxiliary component (323) includes an annular ring (3231) sleeved on the outer wall of the connecting rod, and the outer wall of the annular ring (3231) is provided with four mounting grooves in the circumferential direction, and the interiors of the four mounting grooves are slidably provided with strip sliders (3232), and the two ends of the strip sliders (3232) are fixedly connected to the inner walls of the mounting grooves through springs. The outer wall of the annular ring (3231) is also provided with an arc-shaped auxiliary plate (3233) through a torsion spring at the positions of the four strip sliders (3232), and a linkage plate (3234) is provided between the arc-shaped auxiliary plate (3233) and the strip slider (3232), and the two ends of the linkage plate (3234) are respectively rotatably connected to the arc-shaped auxiliary plate (3233) and the strip slider (3232).

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