Abrasive belt grinding rotating disc for bent pipes

Abstract

The utility model provides a bent pipe abrasive belt grinding rotating disc, which relates to the technical field of automatic grinding and polishing equipment, and comprises a driving motor, a transmission mechanism, a grinding mechanism, a driving synchronous belt and a driven synchronous belt, and the transmission mechanism drives the driving synchronous belt and the driven synchronous belt to operate so as to drive the grinding mechanism; a proper force arm is provided for the pressing wheel balancing weight, and the centrifugal force of outward movement generated by the pressing wheel balancing weight is larger than the centrifugal force of outward movement generated by the abrasive belt pressing wheel after the rotating disc with the synchronous belt teeth rotates. The outward moving centrifugal force generated by the pressing wheel balancing weight generates opposite force through meshing transmission of the two gear sets, the direction of the outward moving centrifugal force generated by the abrasive belt pressing wheel is forcibly changed, the outward moving centrifugal force is converted into inward moving centripetal force, and supporting force is provided for the two abrasive belts. The higher the rotating speed of the rotating disc with the synchronous belt teeth is or the larger the weight of the pressing wheel balancing weight is, the larger the centripetal force of the abrasive belt pressing wheel is, and the higher the cutting force is when the abrasive belt grinds a product.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic grinding and polishing equipment, in particular to a sanding rotating disk for a bent pipe for grinding and wire drawing the outer surfaces of straight pipes and bent pipe products. Background Art

[0002] The existing numerically controlled sanding rotating disks for bent pipes on current equipment have the following defects:

[0003] 1. The cutting force of the sand belts on the existing numerically controlled sanding rotating disks for bent pipes is insufficient, the grinding process is excessive, the grinding efficiency is low, and the labor cost is too high (because the two sand belts on the existing numerically controlled sanding rotating disks for bent pipes rotate around the outer surface of the product at high speed in a suspended state for grinding, and there are no components on the back of the contact part between the two sand belts and the outer surface of the product to provide support force for the sand belts, so the cutting force of the sand belts on the outer surface of the product is insufficient, and it is difficult to grind and remove defects such as slight scratches, bumps and stamping and stretching marks on the outer surface of the product blank. It is necessary to manually assist in completely grinding and removing all the defects on the outer surface of the product blank first, and then use the existing numerically controlled sanding rotating disks for bent pipes on the equipment to perform three grinding processes on the outer surface of the product: ① grinding with a 120# sand belt for about 50 seconds → ② grinding with a 240# sand belt for about 45 seconds → ③ grinding with a 400# sand belt for about 40 seconds to achieve the surface treatment effect before subsequent polishing or wire drawing of the outer surface of the product).

[0004] 2. The sand belts on the existing numerically controlled sanding rotating disks for bent pipes are easily blocked, the sanding effect on the outer surface of the product is unstable, the qualified rate is low, the utilization rate of the sand belts is not high, and the cost of sanding consumables for the outer surface of the product is too high (because the two sand belts on the existing numerically controlled sanding rotating disks for bent pipes rotate around the outer surface of the product at high speed in a suspended state for wrapping grinding, and the contact between the two sand belts and the outer surface of the product is surface contact. During the grinding process of the two sand belts, due to the excessive heat generated by the product, metal dust is easily adhered to the surface of the sand belts and cannot be thrown out, resulting in the blockage of the surface of the sand belts. As a result, the new sand belts start to slip on the outer surface of the product without cutting force after grinding a dozen products due to the blockage of the surface of the sand belts. At this time, only 1 / 3 to 1 / 4 of the surface of the sand belts is worn and new sand belts need to be replaced, causing waste of the sand belts; because the surface of the new sand belts is relatively sharp and the cutting force is strong, the surface grinding effect of the product will be relatively good. When metal dust adheres to the surface of the sand belts after grinding several products and the cutting force becomes weak, the grinding effect on the outer surface of the product will become worse and worse, and the qualified rate of the outer surface of the product will become lower and lower).

[0005] 3. When the sand belts on the existing numerically controlled sanding rotating disks for bent pipes are grinding products with large height differences and different diameters (for example: some products have a diameter of 25 mm and some products have a diameter of 108 mm), it is necessary to frequently replace sand belts of different lengths, which brings unnecessary trouble to customers in terms of procurement and use.

[0006] 4. On the existing equipment, the rotation of the abrasive belt on the numerically controlled pipe-bending abrasive belt grinding rotating disk is driven by two small gears making planetary motion around a large gear on a fixed disk to drive the abrasive belt to rotate. Because there is a large amount of metal dust in the grinding industry and there is no way to continuously lubricate, the three gears, large and small, often wear and need to be replaced frequently, which is rather troublesome.

[0007] In view of the above problems, we propose a pipe-bending abrasive belt grinding rotating disk. Content of the Utility Model

[0008] The purpose of the present utility model is to provide a pipe-bending abrasive belt grinding rotating disk to solve the above-mentioned deficiencies in the technology.

[0009] To achieve the above purpose, the present utility model provides the following technical solution: A pipe-bending abrasive belt grinding rotating disk, including a driving motor, a transmission mechanism, a grinding mechanism, a driving synchronous belt and a driven synchronous belt. The output end of the driving motor is installed and drives the driving synchronous belt to drive the transmission mechanism, and the transmission mechanism rotates to drive the driven synchronous belt to operate and further drive the grinding mechanism;

[0010] The driving motor is installed on a fixed seat, and the output end extends to the other end of the fixed seat and is equipped with a main motor synchronous pulley;

[0011] The transmission mechanism includes a fixed disk, a bearing, a rotating disk and a gland assembly. The fixed disk is installed on the fixed seat on the same side as the output shaft of the main motor synchronous pulley, and the central axis of the fixed disk is located above the central axis of the main motor synchronous pulley. The bearing is located between the fixed disk and the rotating disk, and the gland assembly is located at both ends of the bearing;

[0012] The grinding mechanism includes a connecting plate, a grinding wheel set, a pressure wheel assembly and an abrasive belt. The connecting plate is designed in an obtuse triangle structure. The grinding wheel set is installed at the corner on the side of the connecting plate away from the fixed disk. The pressure wheel assembly is installed between the grinding wheel sets. The abrasive belt is sleeved around the grinding wheel sets and the pressure wheel assembly.

[0013] Further, the fixed seat is designed in an "L" shape, and the driving motor is installed on the outer side of the fixed seat structure. Through slots for Y-axis adjustment of the output end of the driving motor are opened through both ends of the fixed seat, and a semi-circular groove corresponding to the edge of the inner channel in the fixed disk is opened at the top of the fixed seat.

[0014] Further, synchronous belt teeth are provided around the outer circles of the fixed disk and the rotating disk. An inner ring is provided on the side of the fixed disk facing the rotating disk. A bearing installation groove is opened on the side of the rotating disk corresponding to the inner ring. The inner diameter of the bearing is fixed on the inner ring, and the outer diameter is fixed to the bearing installation groove, so that the fixed disk and the rotating disk are rotationally connected.

[0015] Furthermore, the gland assembly includes a bearing front end gland and a bearing rear end gland, and the bearing front end gland and the bearing rear end gland are installed on both sides of the outer diameter of the bearing and fixed to the rotating disk.

[0016] Furthermore, a rotating center hole is symmetrically opened at both ends of the rotating disk, and three groups of adjustment grooves are symmetrically opened in sequence with the rotating center hole at both ends of the rotating disk. The three groups of adjustment grooves are divided into two groups and one group, which are respectively close to / far away from one side of the rotating center hole.

[0017] Furthermore, a driving wheel synchronous belt pulley is installed on the side of the rotating center hole facing the fixed disk, and a driven synchronous belt tensioning and adjusting eccentric wheel is installed on the adjacent driving wheel synchronous belt pulley.

[0018] Furthermore, the active synchronous belt is sleeved between the rotating disk and the periphery of the synchronous belt pulley of the main motor, and the driven synchronous belt is sleeved between the fixed disk and the periphery of the synchronous belt pulley of the driving wheel.

[0019] Furthermore, the edge of the connecting plate is chamfered, and an arc inner groove is opened on the side close to the axis of the rotating disk. The side of the connecting plate that is in contact with the rotating disk is provided with screw holes corresponding to the three groups of adjustment grooves, and adjustment columns are installed in the screw holes.

[0020] Furthermore, the grinding wheel group includes a grinding belt driving wheel, a grinding belt driven wheel and a grinding belt tensioning adjustment wheel. The grinding wheel group is installed on a connecting plate. The grinding belt driving wheel and the grinding belt driven wheel are installed on two smaller corners corresponding to the connecting plate, and the grinding belt tensioning adjustment wheel is located on the larger corner of the connecting plate. The grinding belt driving wheel is directly connected to the driving wheel synchronous pulley through a rotating center hole.

[0021] Furthermore, the pressure wheel assembly includes a gear box, a pressure wheel counterweight, a pressure wheel rotating arm and a sanding belt pressure wheel, the pressure wheel assembly is installed on a connecting plate, the gear box is meshingly connected to a gear group, a connecting column is installed at the upper end of the gear group, the gear box is rotatably connected through the connecting column and is fixedly connected to the pressure wheel counterweight and the pressure wheel rotating arm respectively, the sanding belt pressure wheel is installed on the side of the pressure wheel rotating arm close to the axis of the rotating disk with synchronous belt teeth to resist the sanding belt, and the pressure wheel counterweight is provided with a tensioning spring fixed to the connecting plate at the end away from the sanding belt pressure wheel.

[0022] Compared with the prior art, the beneficial effects of the utility model are:

[0023] 1. The bending pipe abrasive belt grinding rotating disk mechanism symmetrically adds two sets of abrasive belt pressing wheel mechanisms with pressing wheel counterweights, gear boxes and abrasive belt pressing wheels on the back of the two abrasive belts on the grinding / wire drawing rotating disk, providing sufficient support force for the abrasive belt to improve the cutting force of the abrasive belt;

[0024] By providing a suitable lever arm and weight for the counterweight of the pressure wheel, after the rotating disk with synchronous belt teeth rotates, the centrifugal force generated by the counterweight of the pressure wheel moving outward is greater than the centrifugal force generated by the abrasive belt pressure wheel moving outward. The centrifugal force generated by the counterweight of the pressure wheel moving outward is transmitted through the meshing of two gear sets to generate an opposite force, which forcibly changes the direction of the centrifugal force generated by the abrasive belt pressure wheel moving outward into a centripetal force moving inward, so as to provide a supporting force for the two abrasive belts. The faster the rotating speed of the rotating disk with synchronous belt teeth or the greater the weight of the counterweight of the pressure wheel, the greater the centripetal force of the abrasive belt pressure wheel, and the stronger the cutting force when the abrasive belt grinds the product:

[0025] This sanding rotating disk mechanism for bent pipes can increase or decrease the cutting force of the abrasive belt by appropriately increasing or decreasing the rotating speed of the rotating disk according to the size of the defects on the outer surface of the product blank, or by appropriately increasing or decreasing the weight of the counterweight of the pressure wheel;

[0026] After using the sanding rotating disk mechanism for bent pipes, when grinding the product blank, except for defects larger than 0.15 mm on the product blank that require manual assistance for grinding, other defects on the product blank can be ground clean. The grinding process has been changed from the original three processes of manually grinding the product blank defects clean first and then grinding on the existing equipment to directly two processes (① Grinding with 180# abrasive belt for about 30 seconds to remove the surface defects of the product blank → ② Grinding with 320# abrasive belt for about 20 seconds to remove the sand marks of the 180# abrasive belt) after using this utility model (utility model). It can achieve the surface treatment effect before the subsequent polishing of the product outer surface. In this way, the product grinding process is reduced, the product grinding efficiency is improved, and the labor cost is reduced.

[0027] 2. After using the sanding rotating disk mechanism for bent pipes, when the two abrasive belts on the rotating disk grind the outer surface of the product, it is changed from the original wrapped surface contact grinding to line contact grinding by two abrasive belts. In this way, when grinding, while the cutting force of the two abrasive belts is increased, the heat dissipation of the abrasive belts and the product can be greatly increased. In addition, the metal dust is relatively easy to be thrown out and is not easy to stick to the surface of the abrasive belt, causing blockage of the abrasive belt surface, and always maintaining the cutting force of the abrasive belt until the sand on the surface of the abrasive belt is used up, greatly improving the utilization rate of the abrasive belt and reducing the use cost of grinding consumables;

[0028] When grinding each product, under the premise of setting the rotating speed of the rotating disk in the numerical control program and without changing the weight of the counterweight of the pressure wheel and with little deformation of the same product blank, the two abrasive belts can always grind the outer surface of the product with a constant linear speed and constant pressure. In this way, the surface grinding effect of the product is relatively stable, and the qualified rate of the product surface effect is greatly improved.

[0029] 3. After using the sand belt grinding rotating disc mechanism for elbow pipes, when grinding products with large grinding height differences and different diameters, it is only necessary to adjust the distance between the two good sand belts. The sand belts have the same length, eliminating the unnecessary trouble for customers in procurement and use caused by frequently replacing sand belts of different lengths.

[0030] 4. The rotation of the sand belt on the sand belt grinding rotating disc mechanism for elbow pipes is changed to that a driven pulley synchronous belt drives two driving pulley synchronous belts to make planetary motion around the fixed disc synchronous belt pulley through a driven pulley synchronous belt, driving the sand belt to rotate. This solves the problem of frequently replacing gears. At the same time, two synchronous belt tensioning eccentric wheels are used to solve the problem of the tightness of the synchronous belt. Brief Description of the Drawings

[0031] Figure 1 It is a front view schematic diagram of the overall structure of a sand belt grinding rotating disc for elbow pipes provided by the present utility model;

[0032] Figure 2 It is a side view of the transmission mechanism of a sand belt grinding rotating disc for elbow pipes provided by the present utility model;

[0033] Figure 3 It is a rear view schematic diagram of the overall structure of a sand belt grinding rotating disc for elbow pipes provided by the present utility model;

[0034] Figure 4 It is a schematic diagram of the disassembly of the fixed disc, bearing and rotating disc of a sand belt grinding rotating disc for elbow pipes provided by the present utility model;

[0035] Figure 5 It is a schematic diagram of the dissection of the gearbox of a sand belt grinding rotating disc for elbow pipes provided by the present utility model.

[0036] Legend Explanation:

[0037] 1. Driving motor; 11. Fixed seat; 12. Main motor synchronous belt pulley; 13. Through groove; 14. Semi-circular groove;

[0038] 2. Transmission mechanism;

[0039] 21. Fixed disc; 211. Inner ring; 212. Rotation center hole; 213. Adjustment groove;

[0040] 22. Bearing;

[0041] 23. Rotating disc; 231. Bearing installation groove

[0042] 24. Gland assembly; 241. Front gland of bearing; 242. Rear gland of bearing;

[0043] 25. Driving pulley synchronous belt pulley;

[0044] 26. Driven synchronous belt tension adjusting eccentric wheel;

[0045] 3. Grinding mechanism;

[0046] 31. Connecting plate; 311. Inner arc groove; 312. Screw hole; 313. Adjusting column;

[0047] 32. Grinding wheel set; 321. Sand belt driving wheel; 322. Sand belt driven wheel; 323. Sand belt tension adjusting wheel;

[0048] 33. Pressing wheel assembly; 331. Gear box; 332. Pressing wheel counterweight; 333. Pressing wheel rotating arm; 334. Sand belt pressing wheel; 335. Gear set; 336. Connecting column; 337. Tension spring;

[0049] 34. Sand belt;

[0050] 4. Driving synchronous belt;

[0051] 5. Driven synchronous belt. Specific embodiments

[0052] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0053] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant content. Several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0054] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a middle element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this utility model belongs. The terms used in the description of this utility model herein are for the purpose of describing specific embodiments only and are not intended to limit this utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0056] Embodiment 1

[0057] As Figures 1-5 shown, this utility model provides a technical solution: a sanding rotary disk for bent pipes, which includes a driving motor 1, a transmission mechanism 2, a sanding mechanism 3, a driving synchronous belt 4, and a driven synchronous belt 5. The output end of the driving motor 1 is installed and drives the driving synchronous belt 4 to drive the transmission mechanism 2. The transmission mechanism 2 rotates to drive the driven synchronous belt 5 to operate, thereby driving the sanding mechanism 3.

[0058] The driving motor 1 is installed on the fixed seat 11, and the output end extends to the other end of the fixed seat 11 and is provided with a main motor synchronous pulley 12. The driving motor 1 drives the main motor synchronous pulley 12 to rotate.

[0059] The transmission mechanism 2 includes a fixed disk 21, a bearing 22, a rotary disk 23, and a gland assembly 24. The fixed disk 21 is installed on the fixed seat 11 on the same side as the output shaft of the main motor synchronous pulley 12, and the central axis of the fixed disk 21 is located above the central axis of the main motor synchronous pulley 12. The bearing 22 is located between the fixed disk 21 and the rotary disk 23, and the gland assembly 24 is located at both ends of the bearing 22.

[0060] The sanding mechanism 3 includes a connecting plate 31, a sanding wheel set 32, a pressure wheel assembly 33, and a sand belt 34. The connecting plate 31 is designed in an obtuse triangle structure. The sanding wheel set 32 is installed at the corner on the side of the connecting plate 31 away from the fixed disk 21. The pressure wheel assembly 33 is installed between the sanding wheel sets 32, and the sand belt 34 is sleeved around the sanding wheel sets 32 and the pressure wheel assembly 33.

[0061] Embodiment 2

[0062] As Figures 1-5 shown, the fixed seat 11 is designed in an "L" shape. The driving motor 1 is installed on the outer side of the structure of the fixed seat 11, and through slots 13 for Y-axis adjustment of the output end of the driving motor 1 are opened through both ends on the fixed seat 11. A semi-circular groove 14 corresponding to the edge of the inner channel of the fixed disk 21 is opened at the top of the fixed seat 11. The opening of the semi-circular groove 14 avoids blocking the pipe fitting from entering the fixed disk 21.

[0063] The outer rings of the fixed disk 21 and the rotating disk 23 are provided with synchronous belt teeth. An inner ring 211 is provided on the side of the fixed disk 21 facing the rotating disk 23. A bearing installation groove 231 is formed on the side of the rotating disk 23 corresponding to the inner ring 211. The inner diameter of the bearing 22 is fixed on the inner ring 211, and the outer diameter is fixed to the bearing installation groove 231, thereby enabling a rotational connection between the fixed disk 21 and the rotating disk 23.

[0064] The gland assembly 24 includes a front bearing gland 241 and a rear bearing gland 242. The front bearing gland 241 and the rear bearing gland 242 are installed on both sides of the outer diameter of the bearing 22 and fixed to the rotating disk 23 to prevent the rotating disk 23 and the fixed disk 21 from separating.

[0065] Rotating center holes 212 are symmetrically formed through both ends of the rotating disk 23. Three groups of adjustment grooves 213 are sequentially formed through both ends of the rotating disk 23 symmetrically with respect to the rotating center holes 212. The three groups of adjustment grooves 213 are divided into two groups and one group, which are respectively close to / away from one side of the rotating center holes 212.

[0066] A driving pulley synchronous belt pulley 25 is installed on the side of the rotating center hole 212 facing the fixed disk 21. A driven synchronous belt tensioning and adjusting eccentric wheel 26 is installed at the adjacent driving pulley synchronous belt pulley 25.

[0067] The driving synchronous belt 4 is sleeved between the outer perimeters of the rotating disk 23 and the main motor synchronous belt pulley 12. The driven synchronous belt 5 is sleeved between the outer perimeters of the fixed disk 21 and the driving pulley synchronous belt pulley 25.

[0068] The edges of the connecting plate 31 are chamfered, and an arc inner groove 311 is formed on the side close to the axis of the rotating disk 23. Three screw holes 312 corresponding to the three groups of adjustment grooves 213 are provided on the side of the connecting plate 31 that fits the rotating disk 23, and adjustment posts 313 are installed in the screw holes 312.

[0069] The grinding wheel set 32 includes a sand belt driving pulley 321, a sand belt driven pulley 322, and a sand belt tensioning and adjusting pulley 323. The grinding wheel set 32 is installed on the connecting plate 31. The sand belt driving pulley 321 and the sand belt driven pulley 322 are installed on two smaller corners of the corresponding connecting plate 31, while the sand belt tensioning and adjusting pulley 323 is located on a larger corner of the connecting plate 31. The sand belt driving pulley 321 receives power through direct connection with the driving pulley synchronous belt pulley 25.

[0070] The pressure wheel assembly 33 includes a gearbox 331, a pressure wheel counterweight 332, a pressure wheel rotating arm 333, and a sand belt pressure wheel 334. The pressure wheel assembly 33 is installed on the connecting plate 31. The gearbox 331 is meshed with a gear set 335. A connecting column 336 is installed at the upper end of the gear set 335. The gearbox 331 is rotationally connected through the connecting column 336 and is fixedly connected to the pressure wheel counterweight 332 and the pressure wheel rotating arm 333 respectively. The sand belt pressure wheel 334 is installed on one side of the pressure wheel rotating arm 333 close to the axis of the rotating disk 23 with synchronous belt teeth to abut against the sand belt 34. The sand belt pressure wheel 334 is installed on one side of the pressure wheel rotating arm 333 close to the axis of the fixed disk 21 to abut against the sand belt 34. The sand belt pressure wheel 334 directly abuts against the sand belt 34, playing a role in fixing and supporting the sand belt. Since the distance from the pressure wheel counterweight 332 to the rotation center is greater than the distance from the sand belt pressure wheel 334 to the rotation center, and by providing a suitable lever arm and weight for the pressure wheel counterweight 332, after the rotating disk 23 with synchronous belt teeth rotates, the centrifugal force generated by the outward movement of the pressure wheel counterweight 332 is greater than the centrifugal force generated by the outward movement of the sand belt pressure wheel 334. The centrifugal force generated by the outward movement of the pressure wheel counterweight 332 generates an opposite force through the meshing transmission of the two gear sets 335 to forcibly change the direction of the centrifugal force generated by the outward movement of the sand belt pressure wheel 334 into an inward moving centripetal force to provide a supporting force for the two sand belts 34. The faster the rotating speed of the rotating disk 23 with synchronous belt teeth or the greater the weight of the pressure wheel counterweight 332, the greater the centripetal force of the sand belt pressure wheel 334, and the stronger the cutting force when the sand belt 34 grinds the product. The stronger the cutting force of the sand belt 34, the faster the product can be ground or wire-drawn. One end of the pressure wheel counterweight 332 far from the sand belt pressure wheel 334 is provided with a tension spring 337 fixed to the connecting plate 31. The tension spring 337 provides an appropriate tension force to ensure that the pressure wheel assembly 33 can keep the sand belt 34 in a stable tension state during operation, avoiding the influence of the loosening or vibration of the sand belt 34 on the working effect. The pressure wheel counterweight 332 is used to provide a suitable centripetal force for the sand belt pressure wheel 334 when the rotating disk 23 with synchronous belt teeth rotates, ensuring that the sand belt 34 has sufficient cutting force and maintains a constant pressure when grinding the product. In addition, the position and weight of the pressure wheel counterweight 332 are also designed and adjusted according to the pressure required for the actual grinding effect to adjust the characteristic of the conversion of the centrifugal force of the whole assembly into the centripetal force.

[0071] Working principle of the utility model:

[0072] ① By symmetrically adding two sets of belt pressure wheel weight blocks 332, gearboxes 331 and belt pressure wheels 334 of the belt pressure wheel 334 mechanism to the backs of the two abrasive belts 34 on the rotating disk 23 with synchronous belt teeth for numerically controlled pipe bending abrasive belt grinding on the existing equipment, when the rotating disk 23 with synchronous belt teeth rotates, both the pressure wheel weight block 332 and the belt pressure wheel 334 will generate a centrifugal force moving outward (the pressure wheel weight block 332 and the belt pressure wheel 334 will move away from the center of the rotating disk 23 with synchronous belt teeth). Under the condition that the pressure wheel weight block 332 and the belt pressure wheel 334 have the same mass, the same lever arm, and the rotating disk 23 with synchronous belt teeth has the same rotational speed, since the pressure wheel weight block 332 is farther from the center of the rotating disk 23 with synchronous belt teeth than the belt pressure wheel 334, the centrifugal force generated by the pressure wheel weight block 332 moving outward will be greater than the centrifugal force generated by the belt pressure wheel 334 moving outward. Then, the centrifugal force generated by the pressure wheel weight block 332 moving outward generates an opposite force through the meshing transmission of the gear set 335 to forcibly change the direction of the centrifugal force generated by the belt pressure wheel 334 moving outward into a centripetal force moving inward to provide a supporting force for the two abrasive belts 34. The faster the rotational speed of the rotating disk 23 with synchronous belt teeth or the greater the weight of the pressure wheel weight block 332, the greater the centripetal force of the belt pressure wheel 334, and the stronger the cutting force when the abrasive belt 34 grinds the product. The stronger the cutting force of the abrasive belt 34, the fewer the grinding processes of the product can be reduced, the grinding efficiency of the product can be improved, and thus the problems of low grinding efficiency of the product and high labor cost are solved;

[0073] ② By adding two sets of belt pressure wheel weight blocks 332, gearboxes 331 and belt pressure wheels 334 of the belt pressure wheel 334 mechanism to the backs of the two abrasive belts 34 on the rotating disk 23 with synchronous belt teeth for numerically controlled pipe bending abrasive belt grinding on the existing equipment to provide a supporting force for the two abrasive belts 34 on the rotating disk 23 with synchronous belt teeth, when grinding the outer surface of the product, the original covering surface contact grinding is changed to two-line contact grinding. In this way, when grinding, the two abrasive belts 34 not only increase the cutting force, but also the heat dissipation between the abrasive belt 34 and the product can be greatly increased. In addition, the metal dust is relatively easy to be thrown out and is not easy to adhere to the surface of the abrasive belt 34, causing blockage of the surface of the abrasive belt 34, and always maintaining the cutting force of the abrasive belt 34 until the abrasive on the surface of the abrasive belt 34 is used up, greatly improving the utilization rate of the abrasive belt 34 and reducing the use cost of grinding consumables;

[0074] When polishing each product, the rotational speed of the rotating disk 23 with synchronous belt teeth is set in the numerical control program. On the premise of not changing the weight of the pressure wheel counterweight 332 and with little deformation of the same type of product blank, the two abrasive belts 34 can always polish the outer surface of the product at a constant linear speed and constant pressure. In this way, the polishing effect on the product surface is relatively stable, greatly improving the qualification rate of the product surface effect, and solving the problems of unstable polishing effect on the product surface, low qualification rate, low utilization rate of the abrasive belt 34, and excessive abrasive consumption cost for polishing the outer surface of the product.

[0075] ③ By symmetrically adding two connecting plates 31 to the rotating disk 23 with synchronous belt teeth for numerically controlled pipe bending abrasive belt polishing on the existing equipment, and respectively installing two abrasive belt driving wheels 321, abrasive belt driven wheels 322, and abrasive belt tension adjusting wheels 323 that drive the abrasive belt 34 to rotate on the two connecting plates 31. Then, the two abrasive belts 34 are respectively installed on the abrasive belt driving wheels 321, abrasive belt driven wheels 322, and abrasive belt tension adjusting wheels 323 on the two connecting plates 31. When polishing products with different diameters, only by taking the center of the circle of the abrasive belt driving wheel 321 as the center of the circle and adjusting the positions of the two abrasive belt driven wheels 322 in the adjustment slots 213 respectively can the distance between the two abrasive belts 34 be adjusted. After the distance between the two abrasive belts 34 is adjusted, the two connecting plates 31 are respectively fixed on the rotating disk 23 with synchronous belt teeth by bolts. It is possible to polish / brush the surfaces of products with different diameters having a large drop using an abrasive belt 34 of one length, solving the problem of trouble in customer procurement and use.

[0076] ④ By changing the three gears of different sizes that drive the abrasive belt 34 to rotate on the rotating disk 23 with synchronous belt teeth for numerically controlled pipe bending abrasive belt polishing on the existing equipment into a driven synchronous belt 5 that drives two driving synchronous belt wheels 25 to make planetary motion around the synchronous belt wheel of the fixed disk 21 with synchronous belt teeth through the driven synchronous belt 5 to drive the abrasive belt 34 to rotate, the problem of frequent gear replacement is solved. At the same time, two synchronous belt tensioning eccentric wheels 26 are used to solve the problem of the tightness of the driven synchronous belt 5.

[0077] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotating disc for grinding pipe bends with abrasive belts, characterized in that: The invention comprises a driving motor (1), a transmission mechanism (2), a grinding mechanism (3), an active synchronous belt (4) and a driven synchronous belt (5), wherein the output end of the driving motor (1) is installed to drive the active synchronous belt (4) to drive the transmission mechanism (2), and the driven synchronous belt (5) is driven to operate through the rotation of the transmission mechanism (2) and thus drives the grinding mechanism (3); The driving motor (1) is mounted on a fixing seat (11), the output end of which extends to the other end of the fixing seat (11) and is provided with a main motor synchronous pulley (12); The transmission mechanism (2) comprises a fixed disk (21), a bearing (22), a rotating disk (23) and a gland assembly (24); the fixed disk (21) is mounted on a fixed seat (11) on the same side as the output shaft of the main motor synchronous pulley (12), and the central axis of the fixed disk (21) is located above the central axis of the main motor synchronous pulley (12); the bearing (22) is located between the fixed disk (21) and the rotating disk (23); and the gland assembly (24) is located at both ends of the bearing (22); The grinding mechanism (3) comprises a connecting plate (31), a grinding wheel group (32), a pressure wheel assembly (33) and a sanding belt (34); the connecting plate (31) is designed in the shape of an obtuse triangle; the grinding wheel group (32) is installed at a corner of the connecting plate (31) away from the fixed plate (21); the pressure wheel assembly (33) is installed between the grinding wheel groups (32); and the sanding belt (34) is sleeved around the outer periphery of the grinding wheel group (32) and the pressure wheel assembly (33).

2. The rotating disc for grinding pipe bends according to claim 1, characterized in that: The fixing seat (11) is designed as an "L"-shaped structure, and the drive motor (1) is mounted on the outside of the fixing seat (11). Through grooves (13) for Y-axial adjustment of the output end of the drive motor (1) are provided at both ends of the fixing seat (11). A semicircular groove (14) corresponding to the edge of the inner channel of the fixing plate (21) is provided at the top end of the fixing seat (11).

3. The rotating disc for grinding pipe with abrasive belt according to claim 1, characterized in that: The outer rings of the fixed disk (21) and the rotating disk (23) are surrounded by synchronous belt teeth. The fixed disk (21) is provided with an inner ring (211) on the side facing the rotating disk (23). A bearing mounting groove (231) is provided on the side of the rotating disk (23) corresponding to the inner ring (211). The inner diameter of the bearing (22) is fixed on the inner ring (211), while the outer diameter is fixed to the bearing mounting groove (231), thereby enabling the fixed disk (21) and the rotating disk (23) to be rotatably connected.

4. The rotating disc for grinding pipe bends according to claim 1, characterized in that: The gland assembly (24) comprises a bearing front end gland (241) and a bearing rear end gland (242), wherein the bearing front end gland (241) and the bearing rear end gland (242) are mounted on both sides of the outer diameter of the bearing (22) and fixed to the rotating disk (23).

5. The abrasive belt grinding rotating disc for curved pipes according to claim 1, characterized in that: The rotating disk (23) is symmetrically provided with a rotating center hole (212) at both ends, and three groups of adjustment grooves (213) are symmetrically provided in sequence with the rotating center hole (212) at both ends of the rotating disk (23). The three groups of adjustment grooves (213) are divided into two groups and one group, which are respectively close to / far away from the rotating center hole (212) on one side.

6. The rotating disc for grinding pipe bends according to claim 5, characterized in that: A driving wheel synchronous belt pulley (25) is installed on the side of the rotating center hole (212) facing the fixed disk (21), and a driven synchronous belt tensioning and adjusting eccentric wheel (26) is installed adjacent to the driving wheel synchronous belt pulley (25).

7. The method according to claim 6, characterized in that: The active synchronous belt (4) is sleeved between the rotating disk (23) and the periphery of the main motor synchronous belt pulley (12), and the driven synchronous belt (5) is sleeved between the fixed disk (21) and the periphery of the active wheel synchronous belt pulley (25).

8. The rotating disc for grinding pipe with abrasive belts according to claim 5, characterized in that: The edge of the connecting plate (31) is chamfered, and a circular arc inner groove (311) is provided on the side close to the axis of the rotating disk (23). The side of the connecting plate (31) that is in contact with the rotating disk (23) is provided with screw holes (312) corresponding to the three groups of adjustment grooves (213), and an adjustment column (313) is installed in the screw hole (312).

9. The rotating disc for grinding pipe bends according to claim 6, characterized in that: The grinding wheel group (32) comprises a grinding belt driving wheel (321), a grinding belt driven wheel (322) and a grinding belt tensioning and adjusting wheel (323). The grinding wheel group (32) is mounted on a connecting plate (31). The grinding belt driving wheel (321) and the grinding belt driven wheel (322) are mounted on two smaller corners of the corresponding connecting plate (31), while the grinding belt tensioning and adjusting wheel (323) is located on a larger corner of the connecting plate (31). The grinding belt driving wheel (321) is directly connected to a driving wheel synchronous pulley (25) via a rotating center hole (212).

10. The rotating disc for grinding pipe bends according to claim 1, characterized in that: The pressure wheel assembly (33) comprises a gear box (331), a pressure wheel counterweight (332), a pressure wheel rotating arm (333) and a sanding belt pressure wheel (334). The pressure wheel assembly (33) is mounted on a connecting plate (31). The gear box (331) is meshingly connected with a gear set (335). A connecting column (336) is mounted on the upper end of the gear set (335). The connecting column (336) is rotatably connected to the gear box (331) and is respectively fixedly connected to the pressure wheel counterweight (332) and the pressure wheel rotating arm (333). The sanding belt pressure wheel (334) is mounted on a side of the pressure wheel rotating arm (333) close to the axis of a rotating disk (23) with synchronous belt teeth to contact the sanding belt (34). The pressure wheel counterweight (332) is provided with a tensioning spring (337) fixed to the connecting plate (31) at one end away from the sanding belt pressure wheel (334).

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