Polishing device and polishing method for inner wall of metal bent pipe

Abstract

The invention discloses a polishing device and a polishing method for the inner wall of a metal bent pipe, and belongs to the field of polishing devices. A polishing device for the inner wall of a metal bent pipe comprises a base, a grinding wheel is arranged above the base, a driving assembly for driving the grinding wheel to operate is arranged at one end of the grinding wheel, a clamping and fixing assembly is arranged on one side of the grinding wheel, and a fixing ring is fixedly installed on the surface of one side of the clamping and fixing assembly; the rotating disc can rotate; through mutual cooperation of the arranged assemblies, the grinding wheel automatically stretches into the inner wall of one end of a workpiece and conducts grinding and polishing operation around the periphery of the inner wall of the workpiece, the placing position of the clamped workpiece can be adjusted in a self-adaptive mode according to the shape characteristics of the workpiece, the machining precision of the device is improved, and the machining efficiency is improved. And meanwhile, in the machining process, metal chippings raised at the clamping and fixing assembly can be automatically collected and treated, the working environment is protected, meanwhile, the machining stability of the device is improved, and the fault phenomenon is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of polishing devices, and in particular to a polishing device and a polishing method for the inner wall of a metal elbow. Background Art

[0002] In the production process of metal pipe bends, inner wall polishing has always been one of the key technical links. The traditional manual polishing method is not only time-consuming and labor-intensive, but also difficult to ensure polishing quality and efficiency. With the development of technology, various automatic polishing devices have gradually been developed to meet the needs of inner wall polishing of pipe bends of different sizes and shapes;

[0003] There are some automatic polishing equipment on the market. Most of these equipment are designed for straight pipes. The polishing effect on the inner wall of curved pipes, especially the inner wall of curved pipes with a large bending radius, is not good. Although the vibration polishing machine and abrasive flow polishing machine in the prior art can improve the polishing effect to a certain extent, the operation is complicated and the cost is high. Therefore, a metal curved pipe inner wall polishing device and a polishing method are proposed to solve the above-mentioned problems. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that in the prior art, most of the polishing operations for metal bent pipes are performed manually, which is time-consuming and labor-intensive, and some existing polishing equipment has poor polishing effect and poor polishing quality, and to propose a metal bent pipe inner wall polishing device and polishing method.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A device for polishing the inner wall of a metal bent pipe comprises a base, a grinding wheel is arranged above the base, a driving component for driving the grinding wheel is arranged at one end of the grinding wheel, a clamping component is arranged on one side of the grinding wheel, and a fixing ring is fixedly installed on one side surface of the clamping component; a rotatable rotating disk is arranged on one side of the clamping component, and an adjustment unit is arranged on one side of the rotating disk for driving the clamping component to rotate and adjust; two connecting cylinders are installed on the other side of the rotating disk, and when the rotating disk rotates, the two connecting cylinders are used to continuously collect and store metal debris raised during polishing at the clamping component.

[0007] Preferably, a connecting shaft is fixedly connected to one side of the rotating disk, the surface of the connecting shaft is rotatably connected to a fixed seat via a bearing, the fixed seat is fixed on the top surface of the base, one end of the connecting shaft is fixedly connected to the output end of the fifth driving unit, and the fifth driving unit is installed on the surface of the fixed seat.

[0008] Preferably, the clamping assembly includes a fixing frame fixed to one side of the fixing ring, a V-shaped plate is installed at one end of the fixing frame, mounting blocks are fixedly installed on both sides of the fixing frame, an adjusting screw is slidably passed through the mounting block, a nut is provided on the adjusting screw, a limiting plate is installed on the surface of the adjusting screw, and a rubber block is fixed on one side of the limiting plate.

[0009] Preferably, a fixed plate is fixed to one side of the rotating disk, a first guide rail is fixedly installed at one end of the fixed plate, a first slide seat is slidably connected to the surface of the first guide rail, a rotating rod is installed on the top of the first slide seat, and the rotating rod is rotatably connected to one side of the fixed frame through a bearing.

[0010] Preferably, a third slide is fixed to one side of the V-shaped plate, the third slide is slidably connected to the third guide rail, the third guide rail is fixedly mounted on the inclined plate, an arc plate is fixedly connected to one side of the inclined plate, the end of the arc plate is fixedly connected to the rotating disk, the internal thread of the third slide is connected to a screw rod, one end of the screw rod is fixedly connected to the output end of the fourth drive unit, and the fourth drive unit is mounted on one side surface of the inclined plate.

[0011] Preferably, a support rod is fixedly connected to one side of the fixed seat, and a tooth block is fixedly connected to the end of the support rod, the tooth block is sleeved on the surface of the connecting shaft, a lifting rod is fitted on the surface of the tooth block, and the lifting rod is slidably connected in the connecting tube, and a piston is fixedly connected to the end of the lifting rod, a return spring is fixed between the piston and the connecting tube, and the return spring is sleeved on the surface of the lifting rod, one end of the connecting tube is connected to an air intake pipe, and the end of the air intake pipe passes through the rotating disk and is fixedly connected to the fixed ring, a first cavity is opened inside the fixed ring, and air intake nozzles with equal intervals are arranged on the inner wall of the fixed ring.

[0012] Preferably, an air inlet pipe is fixed to the side of the other end of the connecting tube, a one-way valve is provided at the air inlet pipe, an exhaust pipe is provided at the other end of the connecting tube on one side of the air inlet pipe, a second cavity is opened inside the fixing ring on one side of the first cavity, and an air outlet nozzle connected to the second cavity is installed on the inner wall of the fixing ring.

[0013] Preferably, one end side of the connecting cylinder is connected to a delivery pipe, a one-way valve is arranged between the delivery pipe and the connecting cylinder, a collecting box is fixed to the end of the delivery pipe, a cover plate is fixed to one side of the collecting box by bolts, an exhaust hole is arranged on the surface of the cover plate, and a dustproof net is arranged in the exhaust hole.

[0014] Preferably, the driving assembly includes a rotating shaft fixed at one end of the grinding wheel, one end of the rotating shaft is fixedly connected to the output end of the first driving unit, a mounting plate is fixed to the bottom of the first driving unit, a fixed block is fixed to the surface of the mounting plate, the surface of the rotating shaft is rotatably connected to the fixed block through a bearing, a second driving unit is installed at the bottom of the mounting plate, a second slide is fixedly connected to the bottom of the second driving unit, the second slide is slidably connected to a second guide rail, the second guide rail is installed on the surface of the base, one end of the second slide is fixedly connected to the output end of the third driving unit, and the third driving unit is installed on the base.

[0015] A polishing method for a metal elbow inner wall polishing device mainly comprises the following steps:

[0016] Step A: When in use, the arc-shaped curved pipe to be processed is conveniently fixed and clamped by the clamping component, and the grinding wheel is driven to rotate by starting the driving component, so that the grinding wheel is conveniently extended into the inner wall of the clamped arc-shaped mesh pipe to grind and polish the inner wall. In the process of grinding the arc-shaped workpiece, the installation position of the clamping component can be adjusted by the adjustment unit arranged on one side of the rotating disk, so as to finely adjust and control the polishing position of the clamped arc-shaped workpiece. At the same time, the rotating disk is driven to rotate by the starting source to ensure that the inner wall of the arc-shaped curved pipe can be grinded to a certain degree;

[0017] Step B: During the rotation of the rotating disk, the two connecting tubes cooperate with each other, and use the suction nozzle to extract the metal dust and debris raised by grinding from the arc-shaped bent pipe workpiece clamped on one side of the fixed ring, and then transport it to a separate storage area. The external air can be collected and sprayed out through the air outlet nozzle to evenly blow the polished outer wall of one end of the workpiece to prevent the clamped workpiece from shifting and loosening.

[0018] Compared with the prior art, the present invention provides a device for polishing the inner wall of a metal elbow, which has the following beneficial effects:

[0019] 1. This device for polishing the inner wall of a metal bent pipe, when polishing an arc-shaped bent pipe workpiece, drives the rotating disk to rotate through a power source, so that the workpiece to be processed rotates around the axis, so that the inner wall of the arc-shaped bent pipe can be polished with a high-speed rotating grinding wheel in the workpiece.

[0020] 2. In this device for polishing the inner wall of a metal bent pipe, during the rotation of the rotating disk, due to the particularity of the shape of the clamped workpiece, the placement position of the clamping component can be adjusted at any time through the adjustment unit. Furthermore, when the workpiece is being polished, the polishing position of one end of the workpiece can be adjusted in real time according to the polishing requirements, so that the grinding wheel can perform comprehensive grinding and polishing operations on the inner wall of the workpiece in contact with the curved surface.

[0021] 3. A device for polishing the inner wall of a metal bent pipe. When the rotating disk is rotating, the power source generated by the rotating disk cooperates with two connecting tubes and a fixed ring installed at one end of the clamping component to collect the metal debris and dust flying up when grinding one end of the arc-shaped bent pipe, so as to avoid staying on the clamping component and causing deviation in the clamping position of the workpiece, thereby improving the accuracy of workpiece processing.

[0022] The parts not involved in the device are the same as the prior art or can be implemented by using the prior art. The components set in the present invention cooperate with each other, so that the grinding wheel automatically extends into the inner wall of one end of the workpiece, and performs grinding and polishing operations around the inner wall of the workpiece. The placement position of the clamped workpiece can be adaptively adjusted according to the shape characteristics of the workpiece to improve the processing accuracy of the device. At the same time, during the processing, the metal debris raised by the clamping component can be automatically collected and processed, which protects the working environment while improving the stability of the device processing, automating the operation, and reducing the occurrence of malfunctions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of a metal elbow inner wall polishing device proposed by the present invention;

[0024] Figure 2 A schematic diagram of the top view of a metal elbow inner wall polishing device proposed by the present invention;

[0025] Figure 3 A schematic diagram of the side cross-sectional structure of a metal elbow inner wall polishing device proposed by the present invention;

[0026] Figure 4 This is a schematic diagram of the left-side cross-sectional structure of a metal elbow inner wall polishing device proposed by the present invention;

[0027] Figure 5 The present invention proposes Figure 3 A schematic diagram of the enlarged structure of the middle A area;

[0028] Figure 6 This is a schematic diagram of the three-dimensional structure of an adjustment unit in a metal elbow inner wall polishing device proposed by the present invention;

[0029] Figure 7 This is a schematic diagram of a partial three-dimensional structure of a clamping component in a metal elbow inner wall polishing device proposed by the present invention;

[0030] Figure 8 It is another partial three-dimensional structural schematic diagram of the adjustment unit in the metal elbow inner wall polishing device proposed by the present invention;

[0031] Fig. 9 The present invention provides a schematic diagram of a partially cutaway three-dimensional structure of a fixing ring in a device for polishing the inner wall of a metal bent pipe proposed by the present invention.

[0032] In the figure: 1, base; 2, grinding wheel; 3, driving assembly; 31, rotating shaft; 32, first driving part; 33, fixed block; 34, mounting plate; 35, second driving part; 36, second slide seat; 37, second guide rail; 38, third driving part; 4, clamping assembly; 41, fixing frame; 42, V-shaped plate; 43, limit plate; 44, adjusting screw; 45, mounting block; 5, rotating disk; 51, fixed plate; 52, first guide rail; 53, first slide seat; 54, rotating rod; 55, arc plate; 56, inclined plate; 57 , fourth driving unit; 58, screw rod; 59, third slide seat; 591, third guide rail; 6, fixed ring; 61, connecting shaft; 62, fixed seat; 63, fifth driving unit; 71, support rod; 72, gear block; 73, lifting rod; 74, connecting tube; 75, piston; 76, return spring; 761, suction pipe; 77, first cavity; 78, suction nozzle; 79, delivery pipe; 791, collection box; 792, cover plate; 793, exhaust hole; 81, air inlet pipe; 82, exhaust pipe; 83, second cavity; 84, exhaust nozzle. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] In the description of the present invention, the term "multiple" refers to two or more. Unless otherwise clearly defined, the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation of the present invention. The terms "connection", "installation", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, the meaning of "multiple" is two or more.

[0035] In the description of this specification, the description of the terms "one embodiment", "some implementations", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0036] In the present invention, reference is made to Figure 1-Figure 9 A device for polishing the inner wall of a metal elbow comprises a base 1, a grinding wheel 2 is arranged above the base 1, a driving component 3 for driving the grinding wheel 2 is arranged at one end of the grinding wheel 2, a clamping component 4 is arranged on one side of the grinding wheel 2, and a fixing ring 6 is fixedly installed on one side surface of the clamping component 4; a rotatable rotating disk 5 is arranged on one side of the clamping component 4, and an adjusting unit is arranged on one side of the rotating disk 5 for driving the clamping component 4 to rotate and adjust; two connecting cylinders 74 are installed on the other side of the rotating disk 5, and when the rotating disk 5 rotates, they are used to continuously collect and store metal debris raised during polishing at the clamping component 4.

[0037] In the prior art, due to the specific shape of the metal bent pipe, the inner wall needs to be polished after processing to meet the needs of subsequent splicing and installation of the metal bent pipe. However, in actual operation, the pipe fittings are curved and have curved radians. Normal automatic grinding and polishing equipment is often difficult to meet the corresponding polishing needs. Manual polishing machine equipment is often used for polishing operations. However, this method is time-consuming and labor-intensive, increases the labor intensity of the staff, and the staff also need to wear masks to operate, which is easy to cause harm to the human body. Therefore, in this solution, the clamping component 4 is used to fix the arc-shaped bent pipe to be processed and clamp it to a limit position, adapt to the clamping operation of metal bent pipe workpieces of different sizes, and improve the adaptability of the device. By starting the driving component 3 to drive the grinding wheel 2 to rotate, it is convenient to extend the grinding wheel 2 into the inner wall of the clamped arc-shaped mesh pipe to grind and polish the inner wall. In this way, the polishing depth of the inner wall and the height of the grinding and polishing can be adjusted through automated operation. During the grinding of the arc-shaped workpiece, the installation position of the clamping assembly 4 can be adjusted through the adjustment unit arranged on one side of the rotating disk 5, and then the polishing position of the clamped arc-shaped workpiece can be finely adjusted and controlled. At the same time, the rotating disk 5 is driven to rotate 360 ​​degrees through the starting source to ensure that the inner wall of the arc-shaped elbow can be grinded 360 degrees. During the rotation of the rotating disk 5, the two connecting tubes 74 cooperate with each other, and the suction nozzle 78 is used to extract the metal dust and debris raised by grinding on the arc-shaped elbow workpiece clamped on one side of the fixing ring 6, and then transport it to a separate storage area. The external air can be collected and sprayed out through the air outlet nozzle 84 to evenly blow the polished outer wall of one end of the workpiece to avoid the displacement and loosening of the clamped workpiece, thereby providing a stable support effect.

[0038] In a preferred embodiment, referring to Figure 3 and Figure 5 A connecting shaft 61 is fixedly connected to one side of the rotating disk 5, and the surface of the connecting shaft 61 is rotatably connected to the fixed seat 62 through a bearing. The fixed seat 62 is fixed on the top surface of the base 1, and one end of the connecting shaft 61 is fixedly connected to the output end of the fifth driving part 63, and the fifth driving part 63 is installed on the surface of the fixed seat 62. The driving assembly 3 includes a rotating shaft 31 fixed to one end of the grinding wheel 2, and one end of the rotating shaft 31 is fixedly connected to the output end of the first driving part 32. A mounting plate 34 is fixed to the bottom of the first driving part 32, and a fixing block 33 is fixed to the surface of the mounting plate 34. The surface of the rotating shaft 31 is rotatably connected to the fixing block 33 through a bearing. A second driving part 35 is installed at the bottom of the mounting plate 34, and a second slide seat 36 is fixedly connected to the bottom of the second driving part 35. The second slide seat 36 is slidably connected to the second guide rail 37, and the second guide rail 37 is installed on the surface of the base 1. One end of the second slide seat 36 is fixedly connected to the output end of the third driving part 38, and the third driving part 38 is installed on the base 1;

[0039] The fifth driving part 63 is replaced by a reduction motor drive, and the fifth driving part 63 drives the connecting shaft 61 to rotate, thereby driving the rotating disk 5 to rotate, so that the metal elbow clamped on the clamping assembly 4 on one side of the rotating disk 5 rotates around the axis of the rotating disk 5. In the initial stage of grinding and polishing, the third driving part 38 is started to drive the second slide seat 36 to move, and finally the grinding wheel 2 at one end of the rotating shaft 31 is extended into the interior of one end of the metal elbow, and the surface of the grinding wheel 2 is attached to the inner wall of the workpiece. As the workpiece rotates, the inner wall can be ground and polished 360 degrees. The second driving part 35 and the first driving part 32 are respectively a hydraulic rod and a servo motor. The grinding height of the grinding wheel 2 can be adjusted by starting the second driving part 35, and the driving of the first driving part 32 can drive the grinding wheel 2 to rotate at a high speed, and the grinding wheel 2 is used to grind and polish the inner wall of the workpiece. Through this scheme, automatic operation replaces manual grinding and polishing, effectively improves the work efficiency of workpiece processing, reduces labor costs, and improves the accuracy of device grinding and polishing.

[0040] In a preferred embodiment, referring to Figure 6 and Figure 7 The clamping assembly 4 includes a fixing frame 41 fixed to one side of the fixing ring 6, a V-shaped plate 42 is installed at one end of the fixing frame 41, and mounting blocks 45 are fixedly installed on both sides of the fixing frame 41. An adjusting screw 44 is slidably penetrated in the mounting block 45, a nut is provided on the adjusting screw 44, a limiting plate 43 is installed on the surface of the adjusting screw 44, and a rubber block is fixed on one side of the limiting plate 43;

[0041] Among them, when processing the metal bending pipe, the staff can place the workpiece on the clamping assembly 4 in advance, and fix the fixing ring 6 at the end to be polished, and then manually turn the adjusting screw 44 to cooperate with the nut to adjust the limit plate 43 close to the outer wall of the placed workpiece, and use the limit plate 43 to fix the placed workpiece to prevent loosening and displacement during the grinding and polishing process. The rubber block on one side of the limit plate 43 can be well in contact with the outer wall of the workpiece, and will not cause extrusion damage to the outside of the workpiece. This adaptive adjustment method can be used for clamping operations of metal bending pipes of different sizes to improve the adaptability of the device. The clamping position is located at the arc-shaped bending surface of the workpiece. Combined with the shape design of the fixing frame 41, it can better match the clamping and limiting operation of the arc-shaped bending pipe workpiece, and has high stability.

[0042] In a preferred embodiment, referring to Figure 6 and Figure 8A fixed plate 51 is fixed to one side of the rotating disk 5, and a first guide rail 52 is fixedly installed at one end of the fixed plate 51. A first slide seat 53 is slidably connected to the surface of the first guide rail 52, and a rotating rod 54 is installed on the top of the first slide seat 53. The rotating rod 54 is rotatably connected to one side of the fixed frame 41 through a bearing. A third slide seat 59 is fixed to one side of the V-shaped plate 42, and the third slide seat 59 is slidably connected to the third guide rail 591. The third guide rail 591 is fixedly installed on the inclined plate 56, and an arc plate 55 is fixedly connected to one side of the inclined plate 56. The end of the arc plate 55 is fixedly connected to the rotating disk 5, and a screw rod 58 is connected to the internal thread of the third slide seat 59. One end of the screw rod 58 is fixedly connected to the output end of the fourth driving unit 57, and the fourth driving unit 57 is installed on one side surface of the inclined plate 56.

[0043] During the grinding and polishing process, due to the structural particularity of the metal bent pipe, when it is necessary to perform a deep polishing operation on the inner wall of the pipe fitting, due to structural limitations, the position of the clamped workpiece needs to be adaptively adjusted so that the inner wall of the pipe fitting can be better polished uniformly. Therefore, during processing, the operator can start the fourth drive unit 57 to drive the screw 58 to rotate, thereby causing the third slide 59 to slide and displace on the third guide rail 591, and finally adjust the workpiece placement position on the clamping component 4. In conjunction with the above-mentioned polishing operation steps, when polishing the inner wall of the arc-shaped pipe fitting, the uniformity of the polishing of the device is improved. One end of the clamping component 4 is fixed to the third slide 59 by a V-shaped plate 42. When the position of the clamping component 4 is adjusted, the other end of the clamping component 4 is rotatably connected by a rotating rod 54. As the first slide 53 displaces and slides on the first guide rail 52, the other end of the clamping component 4 is moved and limited, thereby improving the stability of the device adjustment.

[0044] It should be noted that the fourth driving unit 57 is driven by a reduction motor.

[0045] In a preferred embodiment, referring to Figure 4 Figure 5 and Fig. 9A support rod 71 is fixedly connected to one side of the fixed seat 62, and a tooth block 72 is fixedly connected to the end of the support rod 71. The tooth block 72 is sleeved on the surface of the connecting shaft 61, and a lifting rod 73 is fitted on the surface of the tooth block 72. The lifting rod 73 is slidably connected in the connecting tube 74, and a piston 75 is fixedly connected to the end of the lifting rod 73. A return spring 76 is fixed between the piston 75 and the connecting tube 74. The return spring 76 is sleeved on the surface of the lifting rod 73. One end of the connecting tube 74 is connected to an air suction pipe 761, and the end of the air suction pipe 761 passes through the rotating disk 5 and is fixedly connected to the fixed ring 6. A first cavity 77 is opened inside the fixed ring 6, and air suction nozzles 78 with equal spacing are arranged on the inner wall of the fixed ring 6. An air inlet pipe 81 is fixed to the side of the other end of the connecting tube 74, and a one-way valve is provided at the air inlet pipe 81. An exhaust pipe 82 is provided on one side of the air inlet pipe 81 at the other end of the connecting tube 74. A second cavity 83 is provided on one side of the first cavity 77 inside the fixing ring 6, and an air outlet nozzle 84 connected to the second cavity 83 is installed on the inner wall of the fixing ring 6. A delivery pipe 79 is connected to the side of one end of the connecting tube 74, and a one-way valve is provided between the delivery pipe 79 and the connecting tube 74. A collecting box 791 is fixed to the end of the delivery pipe 79, and a cover plate 792 is fixed to one side of the collecting box 791 by bolts. An exhaust hole 793 is provided on the surface of the cover plate 792, and a dustproof net is provided in the exhaust hole 793.

[0046] The cam 75 is pressed against the locking cam 74 to release the locking cam 76, which in turn moves the locking cam 74 towards the locking cam 76. The cam 75 is pressed against the locking cam 76 to release the locking cam 76.

[0047] It should be noted that, due to the setting of the two connecting cylinders 74, when negative pressure is generated in the rodless chamber in one of the connecting cylinders 74, the rodless chamber in the other connecting cylinder 74 performs a material conveying operation and conveys the material to the collecting box 791. This reciprocating process makes the suction nozzle 78 in a continuous negative pressure adsorption state. A one-way valve is provided at the connection between the suction pipe 761 and the connecting cylinder 74, and the two suction pipes 761 are connected to each other, and finally connected to the fixing ring 6 through one of the suction pipes 761. The two exhaust pipes 82 are connected to each other, and finally connected to the fixing ring 6 through one of the exhaust pipes 82. A one-way valve is provided at the connection between the exhaust pipe 82 and the connecting cylinder 74.

[0048] On the other hand, during the reciprocating sliding of the piston 75, the external air is extracted from the rod chamber in the connecting tube 74, and then transported to the air outlet nozzle 84 through the exhaust pipe 82, and evenly sprayed out through multiple air outlet nozzles 84. When the workpiece is installed, one end of the workpiece is sleeved in the fixed ring 6, but does not exceed the position of the suction nozzle 78. In this way, the uniform air jet from the air outlet nozzle 84 has a good supporting effect on the outer wall of the grinding end of the workpiece, reducing the displacement of the workpiece caused by the vibration of the inner wall of the workpiece during the grinding and polishing operation, further improving the accuracy and stability of the polishing operation of the device, and the air blowing of the air outlet nozzle 84 will not affect the suction nozzle 78.

[0049] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for polishing the inner wall of a metal bent pipe, comprising a base (1), a grinding wheel (2) is arranged above the base (1), a driving assembly (3) for driving the grinding wheel (2) is arranged at one end of the grinding wheel (2), and a clamping assembly (4) is arranged at one side of the grinding wheel (2), characterized in that: A fixing ring (6) is fixedly mounted on a side surface of the clamping assembly (4); A rotatable rotating disk (5) is arranged on one side of the clamping assembly (4); an adjustment unit is arranged on one side of the rotating disk (5) for driving the clamping assembly (4) to rotate and adjust; Two connecting cylinders (74) are installed on the other side of the rotating disk (5) and are used to continuously collect and store metal debris raised during polishing at the clamping assembly (4) when the rotating disk (5) rotates.

2. A metal elbow inner wall polishing device according to claim 1, characterized in that: A connecting shaft (61) is fixedly connected to one side of the rotating disk (5); the surface of the connecting shaft (61) is rotatably connected to a fixing seat (62) via a bearing; the fixing seat (62) is fixed on the top surface of the base (1); one end of the connecting shaft (61) is fixedly connected to an output end of a fifth driving unit (63); and the fifth driving unit (63) is mounted on the surface of the fixing seat (62).

3. A metal elbow inner wall polishing device according to claim 1, characterized in that: The clamping assembly (4) comprises a fixing frame (41) fixed to one side of the fixing ring (6), a V-shaped plate (42) being installed at one end of the fixing frame (41), mounting blocks (45) being fixedly installed on both sides of the fixing frame (41), an adjusting screw (44) slidingly passing through the mounting block (45), a nut being provided on the adjusting screw (44), a limiting plate (43) being installed on the surface of the adjusting screw (44), and a rubber block being fixed on one side of the limiting plate (43).

4. A device for polishing inner wall of a metal elbow according to claim 3, characterized in that: A fixed plate (51) is fixed to one side of the rotating disk (5); a first guide rail (52) is fixedly mounted on one end of the fixed plate (51); a first slide seat (53) is slidably connected to the surface of the first guide rail (52); a rotating rod (54) is mounted on the top of the first slide seat (53); and the rotating rod (54) is rotatably connected to one side of the fixed frame (41) via a bearing.

5. The inner wall polishing device of a metal elbow according to claim 3, characterized in that: A third slide seat (59) is fixed to one side of the V-shaped plate (42), and the third slide seat (59) is slidably connected to a third guide rail (591), and the third guide rail (591) is fixedly mounted on an inclined plate (56). An arc plate (55) is fixedly connected to one side of the inclined plate (56), and an end of the arc plate (55) is fixedly connected to the rotating disk (5). A lead screw (58) is internally threadedly connected to the third slide seat (59), and one end of the lead screw (58) is fixedly connected to an output end of a fourth drive unit (57). The fourth drive unit (57) is mounted on a side surface of the inclined plate (56).

6. A device for polishing inner wall of a metal elbow according to claim 2, characterized in that: A support rod (71) is fixedly connected to one side of the fixed seat (62), and a tooth block (72) is fixedly connected to the end of the support rod (71). The tooth block (72) is sleeved on the surface of the connecting shaft (61). A lifting rod (73) is fitted on the surface of the tooth block (72). The lifting rod (73) is slidably connected in the connecting tube (74). A piston (75) is fixedly connected to the end of the lifting rod (73). A return spring (76) is fixed between the piston (75) and the connecting tube (74). The return spring (76) is sleeved on the surface of the lifting rod (73). One end of the connecting tube (74) is connected to an air intake pipe (761). The end of the air intake pipe (761) passes through the rotating disk (5) and is fixedly connected to the fixed ring (6). A first cavity (77) is provided inside the fixed ring (6), and air intake nozzles (78) with equal intervals are provided on the inner wall of the fixed ring (6).

7. A device for polishing inner wall of a metal elbow according to claim 6, characterized in that: An air intake pipe (81) is fixed to the side surface of the other end of the connecting tube (74), and a one-way valve is arranged at the air intake pipe (81). An exhaust pipe (82) is arranged at the other end of the connecting tube (74) on one side of the air intake pipe (81). A second cavity (83) is opened inside the fixing ring (6) on one side of the first cavity (77), and an air outlet nozzle (84) connected to the second cavity (83) is installed on the inner wall of the fixing ring (6).

8. The inner wall polishing device of a metal elbow according to claim 6, characterized in that: One end side of the connecting tube (74) is connected to a delivery pipe (79), a one-way valve is provided between the delivery pipe (79) and the connecting tube (74), a collection box (791) is fixed to the end of the delivery pipe (79), a cover plate (792) is fixed to one side of the collection box (791) by bolts, an exhaust hole (793) is provided on the surface of the cover plate (792), and a dustproof net is provided in the exhaust hole (793).

9. The inner wall polishing device of a metal elbow according to claim 1, characterized in that: The driving assembly (3) comprises a rotating shaft (31) fixed to one end of the grinding wheel (2), one end of the rotating shaft (31) is fixedly connected to the output end of the first driving part (32), a mounting plate (34) is fixed to the bottom of the first driving part (32), a fixing block (33) is fixed to the surface of the mounting plate (34), the surface of the rotating shaft (31) is rotatably connected to the fixing block (33) via a bearing, a second driving part (35) is mounted to the bottom of the mounting plate (34), a second slide seat (36) is fixedly connected to the bottom of the second driving part (35), the second slide seat (36) is slidably connected to a second guide rail (37), the second guide rail (37) is mounted on the surface of the base (1), one end of the second slide seat (36) is fixedly connected to the output end of the third driving part (38), and the third driving part (38) is mounted on the base (1).

10. A polishing method for a metal elbow inner wall polishing device, according to the metal elbow inner wall polishing device of claim 8, characterized in that: The main steps include: Step A: When in use, the arc-shaped curved pipe to be processed is conveniently fixed and clamped in a limited position by the clamping component (4), and the grinding wheel (2) is driven to rotate by starting the driving component (3), so that the grinding wheel (2) is conveniently extended into the inner wall of the clamped arc-shaped mesh pipe to grind and polish the inner wall. In the process of grinding the arc-shaped workpiece, the installation position of the clamping component (4) can be adjusted by the adjustment unit arranged on one side of the rotating disk (5), so as to finely adjust and control the polishing position of the clamped arc-shaped workpiece. At the same time, the rotating disk (5) is driven to rotate 360 ​​degrees by the starting source to ensure that the inner wall of the arc-shaped curved pipe can be grinded 360 degrees. Step B: During the rotation of the rotating disk (5), the two connecting tubes (74) cooperate with each other to extract metal dust and debris raised by grinding from the arc-shaped bent pipe workpiece clamped on one side of the fixing ring (6) using the suction nozzle (78), and then transport it to a separate storage area. The external air can be collected and sprayed through the air outlet nozzle (84) to evenly blow air to the polished outer wall of one end of the workpiece to prevent the clamped workpiece from being displaced and loosened.

Images