A double-end polishing device for metal pipe ends

Abstract

The application relates to a double-end polishing device for metal pipe ends, which comprises a polishing support, a supporting mechanism for supporting a pipe, a polishing mechanism for polishing the end of the pipe, a first moving module installed on the polishing support and used for driving the polishing mechanism to lift and slide, a rotating mechanism arranged on the first moving module and used for driving the polishing mechanism to rotate, and a positioning mechanism arranged on the polishing support and used for positioning the position of the end of the pipe; the polishing mechanism comprises a fixed support, two groups of polishing wheels arranged in parallel, a first driving assembly used for driving the polishing wheels to rotate, and a second driving assembly used for driving the two polishing wheels to move close to or away from each other. The application has the effect of automatically polishing the inner wall, the outer wall and the bevel of the pipe at the same time.

Description

Technical Field

[0001] This application relates to the field of pipe processing technology, and in particular to a double-head grinding device for metal pipe ends. Background Technology

[0002] During pipe fitting processing, the ends, about 2-3 cm long, need to be ground to leave a relatively safe space for welding. Specifically, this involves grinding the inner and outer walls of the pipe fitting end, as well as the bevel. The bevel is a slope created by grinding the pipe fitting end. Grinding the pipe end removes the oxide layer on the surface of the pipe fitting end, making the end smooth and helping to improve the quality of subsequent welding.

[0003] Traditional grinding methods mainly rely on manual operation, which is inefficient and produces inconsistent quality. With the development of automation technology, some automated grinding equipment has appeared on the market. However, these devices are usually single-function and cannot grind the inner wall, outer wall, and bevel of pipe fittings at the same time. They also have poor adaptability to pipe fittings of different diameters.

[0004] Therefore, it is indeed necessary to improve existing technologies to address their shortcomings. Summary of the Invention

[0005] To automate the simultaneous grinding of the inner wall, outer wall, and bevel of pipe fittings, this application provides a dual-head grinding device for metal pipe ends.

[0006] The dual-head grinding equipment for metal pipe ends provided in this application adopts the following technical solution: A metal pipe end double-head grinding device includes a grinding bracket, a support mechanism for supporting the pipe, a grinding mechanism for grinding the end of the pipe, a first moving module installed on the grinding bracket and used to drive the grinding mechanism to rise, fall and slide, a rotating mechanism disposed on the first moving module and used to drive the grinding mechanism to rotate, and a positioning mechanism disposed on the grinding bracket and used to position the end of the pipe. The polishing mechanism includes a fixed bracket, two sets of parallel polishing wheels, a first drive assembly for driving the polishing wheels to rotate, and a second drive assembly for driving the two polishing wheels to move closer or further apart from each other.

[0007] By adopting the above technical solution, a grinding bracket, a support mechanism, a grinding mechanism, a first moving module, a rotating mechanism, and a positioning mechanism are set up. The grinding mechanism includes two sets of parallel grinding wheels, a first driving component, and a second driving component. The second driving component can drive the two grinding wheels to move closer or further apart. Under the action of the second driving component, the two sets of grinding wheels can respectively adhere to the inner wall and outer wall of the pipe and clamp the pipe. The first driving component can drive the grinding wheels to rotate, thereby grinding the pipe. At the same time, the rotating mechanism can drive the grinding mechanism to rotate, thereby grinding the bevel at the end of the pipe. This realizes the automated grinding of the inner wall, outer wall, and bevel at the end of the pipe on one machine, which can effectively remove the oxide layer on the surface of the pipe end.

[0008] Optionally, the grinding wheel includes a grinding shaft, a main wheel fixedly sleeved on the grinding shaft, and a secondary wheel connected to the end of the grinding shaft, wherein the diameter of the main wheel is larger than the diameter of the secondary wheel.

[0009] By adopting the above technical solution, the specific structure of the grinding wheel is disclosed. The grinding wheel includes a grinding shaft, a main wheel fixedly sleeved on the grinding shaft, and a secondary wheel connected to the end of the grinding shaft, so that the main wheel and the secondary wheel can grind large-diameter pipe fittings and small-diameter pipe fittings respectively, thereby helping to improve the adaptability of the grinding wheel.

[0010] Optionally, the first drive assembly includes a drive motor whose output end is connected to one of the grinding shafts, a transmission gear disposed on the grinding shaft, and a timing belt that synchronously drives the two transmission gears.

[0011] By adopting the above technical solution, a grinding shaft is driven by a drive motor, and two grinding shafts are rotated synchronously by means of a synchronous belt and transmission gear, so as to realize the synchronous rotation of the two grinding wheels to grind the end of the pipe, which helps to improve the grinding quality and stability.

[0012] Optionally, the second drive assembly includes a first sliding plate that slides vertically and horizontally on the fixed bracket and is arranged for one of the grinding shafts, a drive cylinder fixedly connected to the first sliding plate, and a second sliding plate that slides vertically and horizontally on the fixed bracket and is arranged for the other grinding shaft; the piston rod of the drive cylinder is connected to the fixed bracket; the first sliding plate is provided with a first rack, the fixed bracket is provided with a first gear meshing with the first rack, and the second sliding plate is provided with a second rack meshing with the first gear and arranged parallel to the first rack.

[0013] By adopting the above technical solution, the specific structure of the second driving component is disclosed. The second driving component includes a first sliding plate that slides and rises on a fixed bracket, a driving cylinder fixedly connected to the first sliding plate, and a second sliding plate that slides and rises on the fixed bracket. Two grinding shafts are respectively arranged on the first and second sliding plates. When the driving cylinder is started, since the piston rod of the driving cylinder is connected to the fixed bracket, the driving cylinder body is subjected to a reaction force that drives the first sliding plate to slide and rise on the fixed bracket. With the transmission of the first rack, the first gear, and the second rack, the second sliding plate is moved up and down accordingly, thereby realizing that the two grinding wheels move closer or further apart. When they move closer to each other and fit against the inner and outer walls of the pipe, the inner and outer walls of the pipe can be ground simultaneously. After grinding is completed, the two grinding wheels move further apart to facilitate subsequent processing of the pipe, thereby improving the quality and efficiency of pipe grinding.

[0014] Optionally, the first drive assembly further includes a fastening gear, a first gear seat for the fastening gear to rotate, a connecting rod connected to the first gear seat, a limiting member disposed at the end of the connecting rod, and a first spring sleeved on the connecting rod; the synchronous belt also synchronously drives the two transmission gears and the fastening gear; the fixed bracket is provided with a fastening plate and a connecting block for the connecting rod to pass through is provided in the fastening plate; the two ends of the first spring are respectively connected to the connecting block and the limiting member.

[0015] By adopting the above technical solution, using the fastening gear, the first gear seat, the connecting rod, the limiting component and the first spring, and in conjunction with the synchronous belt, the two transmission gears and the fastening gear are driven synchronously. This ensures that the synchronous belt is always kept taut, guaranteeing the stability of the transmission, and thus ensuring the stable rotation of the grinding wheel. This helps to improve the grinding stability and grinding quality of the pipe end.

[0016] Optionally, the rotating mechanism includes a fixed frame, a third rack that slides and moves vertically within the fixed frame, a third driving member that drives the third rack to move up and down, and a second gear that meshes with the third rack and is rotatably mounted on the fixed frame. The output end of the third driving component is provided with a connector for connecting the third rack and a positioning component is provided on the connector. The fixed frame is provided with a fixed groove and a positioning slider is installed horizontally in the fixed groove for the positioning component to abut against and for determining the rotation angle of the second gear.

[0017] By adopting the above technical solution, the third drive component drives the third rack to rise and fall, which in turn drives the second gear meshing with it to rotate, thereby realizing the rotation of the grinding mechanism. At the same time, with the cooperation of the positioning component and the positioning slider, the rotation angle of the grinding mechanism can be determined, which can more accurately grind the bevel at the end of the pipe, effectively improving the grinding accuracy and grinding effect of the bevel.

[0018] Optionally, the grinding mechanism further includes a floating component connected to the rotating mechanism. The floating component includes a fixed plate fixedly connected to the output end of the rotating mechanism and used for sliding of the fixed support, a floating column disposed on the fixed support, and a second spring sleeved on the floating column. The top of the fixed plate has a first limiting plate, the first limiting plate has a floating through hole for the floating column to pass through, the bottom of the floating column has a second limiting plate, and the two ends of the second spring are respectively connected to the first limiting plate and the second limiting plate.

[0019] By adopting the above technical solution, a floating component connected to the floating mechanism is set up. The fixed bracket can slide on the fixed plate of the floating component. With the help of the floating column and the second spring, the grinding mechanism can adapt to the situation where the wall thickness of the pipe end is uneven or the surface is uneven due to the residual welding slag on the pipe during the grinding process. This helps to improve the fit and stability of the grinding and improve the grinding quality.

[0020] Optionally, the positioning mechanism includes a positioning component for abutting the end of the fitting and a second moving module for driving the positioning component to move. The positioning component includes an abutting roller, a positioning seat for rotatably mounting the abutting roller, a guide rod disposed at the end of the positioning seat away from the abutting roller, a third spring sleeved on the guide rod, a positioning rod for mounting the guide rod, a first sensor disposed at the end of the positioning rod near the positioning seat, and a fourth driving component for driving the positioning rod to move horizontally. The positioning rod has a guide through hole for the guide rod to slide horizontally, and the two ends of the third spring are respectively connected to the positioning rod and the positioning seat.

[0021] By adopting the above technical solution, the positioning component can make the abutment roller abut the end of the pipe fitting under the drive of the second moving module, thereby determining the position of the pipe end and improving the accuracy of subsequent grinding of the pipe fitting by the grinding wheel. At the same time, the setting of the third spring plays a buffering role, avoiding rigid contact between the abutment roller and the pipe fitting. When the first sensor detects that the pipe fitting impacts the abutment roller, it can control the second moving module to stop, thereby helping to improve positioning accuracy and stability.

[0022] Optionally, the support mechanism includes a receiving assembly for receiving the pipe fitting and a clamping assembly for clamping the pipe fitting; the receiving assembly includes two parallel receiving rollers, a fifth driving member for driving the two receiving rollers to rotate simultaneously, and a sixth driving member for driving the two receiving rollers to move closer or further apart from each other.

[0023] By adopting the above technical solution, the support mechanism includes a receiving component and a pressing component. The receiving component uses two parallel receiving rollers to receive the pipe fitting. The fifth driving component drives the receiving rollers to rotate simultaneously, which can drive the pipe fitting to rotate, thereby achieving full grinding of the pipe fitting end. In addition, the sixth driving component can drive the two receiving rollers to move closer or further away from each other to adapt to pipe fittings of different diameters, which helps to improve the adaptability of the equipment.

[0024] Optionally, the clamping assembly includes two parallel clamping rollers, a clamping seat for rotating the two clamping rollers, a seventh driving member for driving the clamping seat to rise and fall, and a second sensor disposed on the clamping seat; the top of the clamping seat is provided with an arrangement cylinder and a fourth spring is provided inside the arrangement cylinder, the output end of the seventh driving member has an abutment post that slides and rises and falls on the arrangement cylinder, and the fourth spring abuts against the abutment post.

[0025] By adopting the above technical solution, the specific structure of the clamping assembly is disclosed. The clamping assembly includes two parallel clamping rollers, a clamping seat, a seventh driving component, and a second sensor. The clamping seat has a top arrangement cylinder containing a fourth spring. The abutment column at the output end of the seventh driving component slides and moves up and down within the arrangement cylinder, abutting against the fourth spring. The seventh driving component drives the clamping seat to rise and fall, enabling the clamping rollers to stabilize and clamp the pipe. Simultaneously, the fourth spring within the arrangement cylinder, in conjunction with the abutment column, buffers the impact force during clamping. Furthermore, the second sensor can promptly stop the seventh driving component, preventing damage to the pipe and equipment, thereby improving the stability and safety of the pipe fixing.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. A double-head grinding device for metal pipe ends, comprising a grinding bracket, a support mechanism, a grinding mechanism, a first moving module, a rotating mechanism, and a positioning mechanism, wherein the grinding mechanism includes a fixed bracket, two sets of parallel grinding wheels, a first driving component, and a second driving component, thereby achieving automated grinding of the inner wall, outer wall, and bevel of the pipe simultaneously; 2. By setting a positioning component and a second moving module in the positioning mechanism, the positioning component can make the abutment roller abut the end of the pipe fitting under the drive of the second moving module, thereby determining the position of the pipe end, which helps to improve the accuracy of subsequent grinding wheel grinding of the pipe fitting; 3. By incorporating a receiving component and a clamping component in the support mechanism, the receiving component can stably support and rotate the pipe fitting, while the clamping component can press the pipe fitting tightly and improve its stability, thereby facilitating subsequent grinding of the pipe fitting. Attached Figure Description

[0027] Figure 1 This is a cross-sectional schematic diagram of the pipe fitting in the embodiment of this application.

[0028] Figure 2 This is a schematic diagram of a double-headed grinding device for metal tube ends in an embodiment of this application.

[0029] Figure 3 This is a cross-sectional view of the receiving component in the embodiments of this application.

[0030] Figure 4 This is a schematic diagram of the clamping component in an embodiment of this application.

[0031] Figure 5 It is along Figure 4 A cross-sectional view showing the direction of the arrow along the HH line.

[0032] Figure 6 This is a schematic diagram of the positioning component in an embodiment of this application.

[0033] Figure 7 This is a partial schematic diagram of the metal tube end double-head grinding device in the embodiments of this application.

[0034] Figure 8 This is a cross-sectional view of the rotating mechanism in an embodiment of this application.

[0035] Figure 9 yes Figure 2 A magnified view of a portion of point A in the middle.

[0036] Figure 10 This is a cross-sectional view of the first driving component in an embodiment of this application.

[0037] Figure 11 This is a cross-sectional view of the second driving component in an embodiment of this application.

[0038] Explanation of reference numerals in the attached drawings: 1. Grinding bracket; 2. Support mechanism; 21. Receiving assembly; 211. Receiving roller; 2111. Turbine; 212. Fifth drive component; 2121. Worm gear; 213. Sixth drive component; 214. Transition component; 2141. Tapered roller bearing; 215. Sliding seat; 22. Clamping assembly; 221. Clamping roller; 222. Clamping seat; 2221. Arrangement cylinder; 2222. Fourth spring; 223. Seventh drive component; 2231. Abutment column; 224. Second sensor; 3. Grinding mechanism; 31. Fixed bracket; 311. Fastening plate; 3111. Connecting block; 312. First gear; 32. Grinding wheel; 321. Grinding shaft; 322. Main wheel; 323. Secondary wheel; 33. First drive assembly; 331. Drive motor; 332. Transmission gear; 333. Fastening gear; 334. Synchronous belt; 335. First gear seat; 336. Connecting rod; 337. Limiting component; 338. First spring; 34. Second drive assembly; 341, first sliding plate; 3411, first rack; 342, drive cylinder; 343, second sliding plate; 3431, second rack; 35, floating assembly; 351, fixed plate; 3511, first limiting plate; 3512, floating through hole; 352, floating column; 3521, second limiting plate; 353, second spring; 4, first moving module; 41, first linear module; 42, second linear module; 5, rotating mechanism; 51, fixed frame 511. Fixed slide rail; 512. Positioning slider; 52. Third rack; 53. Third drive component; 531. Connecting component; 532. Positioning component; 54. Second gear; 6. Positioning mechanism; 61. Positioning assembly; 611. Abutting roller; 612. Positioning seat; 613. Guide rod; 614. Third spring; 615. Positioning rod; 6151. Guide through hole; 616. First sensor; 617. Fourth drive component; 618. Connecting plate; 62. Second moving module; 7. Inner wall; 8. Outer wall; 9. Bevel; Detailed Implementation The following is in conjunction with the appendix Figure 1-11 This application will be described in further detail.

[0039] This application discloses a double-headed grinding device for metal pipe ends, used for grinding the ends of pipe fittings. (Refer to...) Figure 1 The end of the pipe fitting includes an inner wall 7, an outer wall 8, and a bevel 9. In this embodiment, the inner wall 7, outer wall 8, and bevel 9 of the pipe fitting can all be referenced... Figure 1 This will not be cited separately in the following text.

[0040] Reference Figure 2The metal pipe end double-head grinding equipment includes a grinding bracket 1, a support mechanism 2 for supporting the pipe fitting, a grinding mechanism 3 for grinding the end of the pipe fitting, a first moving module 4 mounted on the grinding bracket 1 for driving the grinding mechanism 3 to rise, fall, and slide, a rotating mechanism 5 disposed on the first moving module 4 for driving the grinding mechanism 3 to rotate, and a positioning mechanism 6 disposed on the grinding bracket 1 for positioning the end of the pipe fitting. The first moving module 4 includes a first linear module 41 mounted on the positioning mechanism 6 and a second linear module 42 horizontally slidably mounted on the first linear module 41. The grinding mechanism 3 is mounted on the second linear module 42 via the rotating mechanism 5, therefore the second linear module 42 can drive the rotating mechanism 5 and the grinding mechanism 3 to rise and fall simultaneously.

[0041] Reference Figure 2 and Figure 3 The support mechanism 2 includes a receiving assembly 21 for receiving the pipe fitting and a clamping assembly 22 for clamping the pipe fitting. The receiving assembly 21 includes two parallel receiving rollers 211, a fifth driving member 212, a sixth driving member 213, a transition member 214 connecting the fifth driving member 212 and the sixth driving member 213, and a sliding seat 215 for the transition member 214 to slide horizontally. In this embodiment, the fifth driving member 212 is a motor, and a worm gear 2121 is fixedly sleeved on the output shaft of the motor. The receiving rollers 211 have a turbine 2111 that cooperates with the worm gear 2121. Through the meshing of the turbine 2111 and the worm gear 2121, the fifth driving member 212 can drive the two receiving rollers 211 to rotate simultaneously in the same direction, thereby driving the pipe fitting to rotate. The transition member 214 has tapered roller bearings 2141 sleeved at both ends of each worm 2121. In this embodiment, the sixth drive member 213 is a bidirectional hand crank screw. The two positive and negative nuts of the screw are respectively connected to the transition member 214 of the two sets of receiving rollers 211, so as to drive the two receiving rollers 211 to move closer or further away from each other to adapt to pipes with different outer diameters.

[0042] Reference Figure 4 and Figure 5 The clamping assembly 22 includes two parallel clamping rollers 221, a clamping seat 222 for rotating the two clamping rollers 221, a seventh drive member 223 mounted on the grinding bracket 1, and a second sensor 224 mounted on the clamping seat 222. The clamping seat 222 has a top mounting cylinder 2221 and a fourth spring 2222 inside the mounting cylinder 2221. In this embodiment, the seventh drive member 223 is a cylinder, with its piston rod connected to an abutment post 2231 that slides vertically and vertically across the mounting cylinder 2221. The fourth spring 2222 abuts against the bottom end of the abutment post 2231, allowing the seventh drive member 223 to drive the clamping seat 222 to move up and down. In this embodiment, the second sensor 224 has a sensor switch; when the clamping rollers 221 contact the pipe, the second sensor 224 controls the seventh drive member 223 to stop promptly, preventing damage to the pipe and equipment.

[0043] Reference Figure 2 and Figure 6 The positioning mechanism 6 includes a positioning component 61 for abutting the end of the fitting and a second moving module 62 mounted on the grinding bracket 1. The positioning component 61 includes an abutting roller 611, a positioning seat 612 for rotatably mounting the abutting roller 611, a guide rod 613 located at the end of the positioning seat 612 away from the abutting roller 611, a third spring 614 sleeved on the guide rod 613, a positioning rod 615 for mounting the guide rod 613, a first sensor 616 located at the end of the positioning rod 615 near the positioning seat 612, a fourth driving member 617, and a connecting plate 618 connecting the fourth driving member 617 and the first linear module 41. In this embodiment, the second moving module 62 is a prior art motor linear module, capable of driving the first linear module 41 and the positioning component 61 to move horizontally simultaneously. The positioning rod 615 has a guide through hole 6151 for the guide rod 613 to slide horizontally, and the two ends of the third spring 614 are respectively connected to the positioning rod 615 and the positioning seat 612. In this embodiment, the first sensor 616 is a piezoelectric induction switch of the prior art. When the first sensor 616 detects that the pipe is in contact with the abutment roller 611, it can control the second moving module 62 to stop. In this embodiment, the fourth driving component 617 is a cylinder. After the pipe has completed end positioning, the fourth driving component 617 can drive the positioning rod 615 to move the abutment roller 611 horizontally to make way for the grinding mechanism 3.

[0044] Reference Figure 7 and Figure 8 The rotating mechanism 5 includes a fixed frame 51 that slides and rises on the second linear module 42, a third rack 52 that slides and rises on the fixed frame 51, a third driving member 53, and a second gear 54 that meshes with the third rack 52 and is rotatably mounted on the fixed frame 51. In this embodiment, the third driving member 53 is a cylinder that can drive the third rack 52 to rise and fall. The piston rod end of the cylinder is provided with a connector 531 for connecting the third rack 52, and a positioning member 532 is fixedly connected to the connector 531.

[0045] A fixed groove 511 is provided on the outer side of the fixed frame 51, and a positioning slider 512 for determining the rotation angle of the second gear 54 is horizontally slidably installed in the fixed groove 511. The positioning slider 512 is stepped, and each step is marked with a corresponding angle. In this embodiment, the positioning slider 512 has three steps. The operator aligns the corresponding step of the positioning slider 512 with the positioning member 532 according to the angle of the bevel to be ground. When the third driving member 53 drives the positioning member 532 to abut against the positioning slider 512, the grinding mechanism 3 rotates by the corresponding angle, thereby enabling the grinding mechanism 3 to grind the bevel of the pipe fitting.

[0046] Reference Figure 7 and Figure 9The grinding mechanism 3 includes a fixed bracket 31, two sets of parallel grinding wheels 32, a first drive assembly 33 for driving the grinding wheels 32 to rotate, a second drive assembly 34 for driving the two grinding wheels 32 to move closer or further apart, and a floating assembly 35 connected to the rotating mechanism 5. The grinding wheel 32 includes a grinding shaft 321, a main wheel 322 fixedly sleeved on the grinding shaft 321, and a secondary wheel 323 connected to the end of the grinding shaft 321. The diameter of the main wheel 322 is larger than the diameter of the secondary wheel 323. The main wheel 322 and the secondary wheel 323 can grind large-diameter pipe fittings and small-diameter pipe fittings respectively.

[0047] Reference Figure 10 The first drive assembly 33 includes a drive motor 331 with its output end connected to one of the grinding shafts 321, a transmission gear 332 coaxially disposed on the grinding shaft 321, a fastening gear 333 located on one side of the two transmission gears 332, a synchronous belt 334 for synchronously driving the two transmission gears 332 and the fastening gear 333, a first gear seat 335 for the fastening gear 333 to rotate, a connecting rod 336 connected to the first gear seat 335, a limiting member 337 disposed at the end of the connecting rod 336, and a first spring 338 sleeved on the connecting rod 336. In this embodiment, the drive motor 331 is a belt-driven motor, and the driven wheel of the belt-driven motor is fixedly sleeved on one of the grinding shafts 321. The fixed bracket 31 is provided with a fastening plate 311, and a connecting block 3111 for the connecting rod 336 to pass through is provided in the fastening plate 311, so that the connecting rod 336 can slide towards or away from the transmission gear 332. The two ends of the first spring 338 are connected to the connecting block 3111 and the limiting member 337 respectively, so that the fastening gear 333 always tends to move away from the transmission gear 332, thereby ensuring that the synchronous belt 334 has sufficient contact with the transmission gear 332 and the fastening gear 333, preventing slippage and ensuring the stability of the transmission.

[0048] Reference Figure 11The second drive assembly 34 includes a first sliding plate 341 that slides and rises on a fixed bracket 31 and is arranged for one of the grinding shafts 321, a drive cylinder 342 fixedly connected to the first sliding plate 341, and a second sliding plate 343 that slides and rises on the fixed bracket 31 and is arranged for the other grinding shaft 321. The piston rod of the drive cylinder 342 is connected to the fixed bracket 31, and the cylinder body is fixed to the first sliding plate 341. A first rack 3411 is fixedly provided on the first sliding plate 341, and a first gear 312 meshing with the first rack 3411 is provided on the fixed bracket 31. A second rack 3431 meshing with the first gear 312 and arranged parallel to the first rack 3411 is provided on the second sliding plate 343, and the tooth surfaces of the first rack 3411 and the second rack 3431 are arranged opposite to each other. When the drive cylinder 342 is activated, since the piston rod of the drive cylinder 342 is connected to the fixed bracket 31, the cylinder body of the drive cylinder 342 is subjected to a reaction force, which drives the first sliding plate 341 to rise, thereby driving the first rack 3411 to rise. At this time, the second rack 3431 will descend under the action of the first gear 312, thereby realizing that the two grinding wheels 32 move away from each other. Similarly, when the piston rod of the drive cylinder 342 is reset, the two grinding wheels 32 can come closer to each other to clamp the inner and outer walls of the pipe.

[0049] Reference Figure 10 The floating assembly 35 includes a fixed plate 351 fixedly connected to the output end of the rotating mechanism 5 and used for sliding of the fixed bracket 31, a floating column 352 disposed on the fixed bracket 31, and a second spring 353 sleeved on the floating column 352. The fixed plate 351 has a first limiting plate 3511 at the top and a floating through hole 3512 for the floating column 352 to pass through. The floating column 352 has a second limiting plate 3521 at the bottom. The two ends of the second spring 353 are respectively connected to the first limiting plate 3511 and the second limiting plate 3521, so that the grinding mechanism 3 can float up and down during the grinding process, thereby enabling the grinding wheel 32 to adapt to pipes with uneven wall thickness or uneven surface.

[0050] The implementation principle of a double-head grinding device for metal pipe ends in this application embodiment is as follows: After the pipe is transported to the receiving component 21 of the support mechanism 2, the pressing roller 221 of the pressing component 22 presses down and presses the pipe. Then, the second moving module 62 of the positioning mechanism 6 drives the positioning component 61 to move so that the abutment roller 611 abuts the end of the pipe, thereby determining the position of the pipe end. After that, the fourth driving component 617 of the positioning component 61 drives the positioning rod 615 to move the abutment roller 611 horizontally to make way for the grinding mechanism 3. Next, the first moving module 4 drives the grinding mechanism 3 to rise and slide, so that the grinding wheel 32 reaches the processing position. The first driving component 33 of the grinding mechanism 3 drives the grinding wheel 32 to rotate, and the second driving component 34 drives the two grinding wheels 32 to approach each other and clamp the inner and outer walls of the pipe respectively. At the same time, the fifth driving component 212 of the receiving component 21 drives the receiving roller 211 to rotate, thereby driving the pipe to rotate, so as to fully grind the inner and outer walls of the pipe end. Finally, after the inner and outer walls are ground, the grinding mechanism 3 is rotated by the rotating mechanism 5 to grind the bevel at the end of the pipe, thus realizing the automated grinding of the inner wall, outer wall and bevel of the pipe on one machine.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A double-head grinding device for metal pipe ends, characterized in that, It includes a grinding bracket (1), a support mechanism (2) for supporting the pipe fitting, a grinding mechanism (3) for grinding the end of the pipe fitting, a first moving module (4) installed on the grinding bracket (1) and used to drive the grinding mechanism (3) to rise and slide, a rotating mechanism (5) disposed on the first moving module (4) and used to drive the grinding mechanism (3) to rotate, and a positioning mechanism (6) disposed on the grinding bracket (1) and used to position the end of the pipe fitting. The polishing mechanism (3) includes a fixed bracket (31), two sets of parallel polishing wheels (32), a first drive assembly (33) for driving the polishing wheels (32) to rotate, and a second drive assembly (34) for driving the two polishing wheels (32) to move closer or further apart from each other. The grinding wheel (32) includes a grinding shaft (321), a main wheel (322) fixedly sleeved on the grinding shaft (321), and a secondary wheel (323) connected to the end of the grinding shaft (321). The diameter of the main wheel (322) is larger than the diameter of the secondary wheel (323). The first drive assembly (33) includes a drive motor (331) whose output end is connected to one of the grinding shafts (321), a transmission gear (332) disposed on the grinding shaft (321), and a synchronous belt (334) that synchronously drives the two transmission gears (332). The second drive assembly (34) includes a first sliding plate (341) that slides vertically and horizontally on the fixed bracket (31) and is arranged for one of the grinding shafts (321), a drive cylinder (342) fixedly connected to the first sliding plate (341), and a second sliding plate (343) that slides vertically and horizontally on the fixed bracket (31) and is arranged for the other grinding shaft (321); the piston rod of the drive cylinder (342) is connected to the fixed bracket (31); the first sliding plate (341) is provided with a first rack (3411), the fixed bracket (31) is provided with a first gear (312) meshing with the first rack (3411), and the second sliding plate (343) is provided with a second rack (3431) meshing with the first gear (312) and arranged parallel to the first rack (3411); The rotating mechanism (5) includes a fixed frame (51), a third rack (52) that slides and moves up and down on the fixed frame (51), a third driving member (53) that drives the third rack (52) to move up and down, and a second gear (54) that meshes with the third rack (52) and is rotatably mounted on the fixed frame (51). The output end of the third drive unit (53) is provided with a connector (531) for connecting the third rack (52) and a positioning member (532) is provided on the connector (531). The fixed frame (51) is provided with a fixed slide groove (511) and a positioning slider (512) is horizontally slidably installed in the fixed slide groove (511) for the positioning member (532) to abut against and for determining the rotation angle of the second gear (54). The positioning slider (512) is stepped and each step is marked with a corresponding angle.

2. The double-head grinding equipment for metal pipe ends according to claim 1, characterized in that, The first drive assembly (33) further includes a fastening gear (333), a first gear seat (335) for the fastening gear (333) to rotate, a connecting rod (336) connected to the first gear seat (335), a limiting member (337) disposed at the end of the connecting rod (336), and a first spring (338) sleeved on the connecting rod (336); the synchronous belt (334) also synchronously drives the fastening gear (333) and the two transmission gears (332); the fixed bracket (31) is provided with a fastening plate (311) and a connecting block (3111) for the connecting rod (336) to pass through is provided in the fastening plate (311); the two ends of the first spring (338) are respectively connected to the connecting block (3111) and the limiting member (337).

3. The double-head grinding equipment for metal pipe ends according to claim 1, characterized in that, The grinding mechanism (3) further includes a floating component (35) connected to the rotating mechanism (5). The floating component (35) includes a fixed plate (351) fixedly connected to the output end of the rotating mechanism (5) and used for sliding of the fixed bracket (31), a floating column (352) disposed on the fixed bracket (31), and a second spring (353) sleeved on the floating column (352). The top of the fixed plate (351) has a first limiting plate (3511), the first limiting plate (3511) has a floating through hole (3512) for the floating column (352) to pass through, the bottom of the floating column (352) has a second limiting plate (3521), and the two ends of the second spring (353) are respectively connected to the first limiting plate (3511) and the second limiting plate (3521).

4. The double-head grinding equipment for metal pipe ends according to claim 1, characterized in that, The positioning mechanism (6) includes a positioning component (61) for abutting the end of the fitting and a second moving module (62) for driving the positioning component (61) to move. The positioning component (61) includes an abutting roller (611), a positioning seat (612) for rotatably mounting the abutting roller (611), a guide rod (613) disposed at the end of the positioning seat (612) away from the abutting roller (611), a third spring (614) sleeved on the guide rod (613), and a third spring (614) for the guide rod (613) to move. The positioning rod (615) is mounted on the guide rod (613), a first sensor (616) is disposed at one end of the positioning rod (615) near the positioning seat (612), and a fourth driving member (617) drives the positioning rod (615) to move horizontally; the positioning rod (615) has a guide through hole (6151) for the guide rod (613) to slide horizontally, and the two ends of the third spring (614) are respectively connected to the positioning rod (615) and the positioning seat (612).

5. The double-head grinding equipment for metal pipe ends according to claim 1, characterized in that, The support mechanism (2) includes a receiving assembly (21) for receiving pipe fittings and a clamping assembly (22) for clamping pipe fittings; the receiving assembly (21) includes two parallel receiving rollers (211), a fifth driving member (212) for driving the two receiving rollers (211) to rotate simultaneously, and a sixth driving member (213) for driving the two receiving rollers (211) to move closer or further away from each other.

6. The double-head grinding equipment for metal pipe ends according to claim 5, characterized in that, The clamping assembly (22) includes two parallel clamping rollers (221), a clamping seat (222) for the two clamping rollers (221) to rotate, a seventh driving member (223) for driving the clamping seat (222) to rise and fall, and a second sensor (224) disposed on the clamping seat (222); the top of the clamping seat (222) is provided with an arrangement cylinder (2221) and a fourth spring (2222) is provided inside the arrangement cylinder (2221); the output end of the seventh driving member (223) has an abutment post (2231) that slides and rises and falls on the arrangement cylinder (2221), and the fourth spring (2222) abuts against the abutment post (2231).

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