CN114800177A - Multipurpose steel pipe end grinding device and method - Google Patents

Multipurpose steel pipe end grinding device and method Download PDF

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Publication number
CN114800177A
CN114800177A CN202210732732.4A CN202210732732A CN114800177A CN 114800177 A CN114800177 A CN 114800177A CN 202210732732 A CN202210732732 A CN 202210732732A CN 114800177 A CN114800177 A CN 114800177A
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China
Prior art keywords
polishing
wall
gear
transmission mechanism
inner hole
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CN202210732732.4A
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CN114800177B (en
Inventor
王红新
孟令磊
陈建龙
于志强
张会明
方金艳
王晓林
张礼增
马涛
姜华夏
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Yantai Moon Compressor Co ltd
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Yantai Moon Compressor Co ltd
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Priority to CN202210732732.4A priority Critical patent/CN114800177B/en
Publication of CN114800177A publication Critical patent/CN114800177A/en
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Publication of CN114800177B publication Critical patent/CN114800177B/en
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Abstract

The invention discloses a multipurpose steel pipe end grinding device and method. The polishing device comprises a base, a driving device, a turntable, an outer wall polishing assembly, a fixed gear set, an inner hole polishing assembly, a first transmission mechanism, a second transmission mechanism and a feeding mechanism. When the turntable rotates, the fixed gear group drives the outer wall polishing assembly and the inner hole polishing assembly to move along the radial direction of the turntable through the first transmission mechanism and the feeding mechanism, and simultaneously drives the driving wheel of the outer wall polishing assembly to rotate through the second transmission mechanism. The invention can realize the synchronous polishing of the outer wall and the inner hole of the steel pipe, can adjust according to the pipe diameter, is suitable for the steel pipes with different specifications, and has the advantages of high efficiency, strong adaptability, high utilization rate of the abrasive cloth belt, low cost and the like.

Description

Multipurpose steel pipe end grinding device and method
Technical Field
The invention relates to a grinding device, in particular to a device for grinding an end part of a steel pipe; also relates to a grinding method.
Background
When the steel pipe is used as a common part in the mechanical industry and is connected with other parts, in order to ensure the welding quality of the steel pipe, the oxide skin or the iron rust on the inner wall and the outer wall of the end of the steel pipe is generally required to be polished in advance to ensure the surface smoothness of the steel pipe.
The steel pipe end polishing mode among the prior art mainly has two kinds of manual polishing and mechanical polishing:
the manual polishing wastes time and energy, is low in efficiency, frequently has the condition of uneven polishing, has hidden danger to human health due to dust generated by polishing, and is replaced by mechanical polishing in mass production occasions.
And (II) mechanical polishing, in which a motor is generally used for driving an abrasive cloth belt, an abrasive cloth wheel or a steel wire wheel and the like to polish the steel pipe. For example, chinese utility model patent publication No. CN214559817U, "a frame bent pipe polishing machine" discloses the following structure: the polishing machine comprises a base frame and a transmission mechanism on the frame, the transmission mechanism comprises a motor, a rotary table, a sun gear and a planetary gear, when the rotary table rotates along with the motor, the planetary gear on the rotary table is meshed with the fixed sun gear to realize rotation, an abrasive belt is driven to move, and polishing of the pipe wall are completed. The disadvantages of this approach are: (1) the outer wall and the inner hole can be polished only, and the inner hole cannot be polished, although equipment special for polishing the inner hole is also arranged in the prior art and can be matched with the polishing machine for use, the polishing of the outer wall and the inner hole cannot be performed simultaneously, the efficiency is low, and the total cost of two sets of polishing devices is high; (2) the distance between the abrasive belts is fixed and invariable, and the abrasive belts cannot deal with the polishing of steel pipes with different specifications; (3) after the abrasive belt is worn, the polishing effect is reduced, and the abrasive belt needs to be frequently replaced.
Disclosure of Invention
The invention provides a multipurpose steel pipe end grinding device and a method, and aims to provide the multipurpose steel pipe end grinding device and the method, which are characterized in that: (1) the outer wall and the inner hole are synchronously polished; (2) covering steel pipes with various specifications of pipe diameters; (3) according to the wearing and tearing condition of emery cloth area, the feed of adjustment emery cloth area improves the utilization ratio of emery cloth area, reduces the change frequency.
The technical scheme of the invention is as follows:
a multipurpose steel pipe end polishing device comprises a base, a driving device, a rotary table, an outer wall polishing assembly and a fixed gear set, wherein the driving device is installed on the base and drives the rotary table to rotate;
the outer wall polishing assembly and the inner hole polishing assembly are both arranged on the turntable through a feeding mechanism;
the fixed gear set is in transmission connection with the feeding mechanism through a first transmission mechanism;
the outer wall polishing assembly comprises a driving wheel, a driven wheel and an abrasive belt connected between the driving wheel and the driven wheel, and the driving wheel and the driven wheel are both rotationally connected with a moving seat of the feeding mechanism;
the fixed gear set is also in transmission connection with the outer wall polishing assembly through a second transmission mechanism;
when the turntable rotates, the fixed gear group drives the outer wall polishing assembly and the inner hole polishing assembly to move along the radial direction of the turntable through the first transmission mechanism and the feeding mechanism, and simultaneously drives the driving wheel of the outer wall polishing assembly to rotate through the second transmission mechanism.
As a further improvement of the multipurpose steel pipe end grinding device: the fixed gear set includes a first fixed gear and a second fixed gear.
As a further improvement of the multipurpose steel pipe end grinding device: the first transmission mechanism comprises a first gear, a second gear, a third gear and a first bevel gear;
the first gear and the second gear are coaxially connected and are arranged on the turntable in a rotating connection mode; the third gear and the first bevel gear are coaxially connected and are arranged on the turntable in a rotating connection mode;
the first gear is meshed with the second fixed gear, the second gear is meshed with the third gear, and the first bevel gear is used for being in transmission connection with the feeding mechanism.
As a further improvement of the multipurpose steel pipe end grinding device: the feeding mechanism comprises a mounting seat, a second bevel gear, a screw rod and the moving seat;
the movable seat is installed on the installation seat in a sliding fit mode, the screw rod is matched with a nut installed on the movable seat, and the second bevel gear is installed at the end of the screw rod and meshed with the first bevel gear.
As a further improvement of the multipurpose steel pipe end grinding device: the second transmission mechanism comprises two groups of fourth gears which are respectively meshed with the first fixed gears of the fixed gear set, and further comprises first belt wheels which are correspondingly connected with the two groups of fourth gears one by one, and the first belt wheels are arranged on the turntable in a rotating connection mode; the second transmission mechanism further comprises a transmission belt connected between the two groups of first pulleys, and the arrangement direction of the transmission belt is parallel to the feeding direction of the feeding mechanism;
the outer wall polishing assembly further comprises a second belt wheel connected with the driving wheel; the second belt wheel is in contact fit with the transmission belt.
As a further improvement of the multipurpose steel pipe end grinding device: the feeding mechanism further comprises an adjusting plate, a second adjusting long groove perpendicular to the feeding direction of the feeding mechanism is formed in the adjusting plate, and the adjusting plate is connected with the moving seat through a bolt penetrating through the second adjusting long groove; the adjusting plate is provided with a rotating bearing, and the driving wheel is connected with the rotating bearing.
As a further improvement of the multipurpose steel pipe end grinding device: the outer wall polishing assembly, the inner hole polishing assembly, the first transmission mechanism and the feeding mechanism are two groups and are oppositely arranged on the turntable.
As a further improvement of the multipurpose steel pipe end grinding device: the inner hole polishing assembly comprises a bracket, a polishing block, a limiting nut, a spring, an adjusting shaft and a connecting shaft;
the bracket is arranged on the movable seat, and a vertical plate parallel to the axis of the turntable is arranged on the bracket; the outer end of the connecting shaft penetrates through the vertical plate and the limiting nut outwards and then is connected with the polishing block, and external threads on the connecting shaft are matched with the limiting nut; the inner end of the connecting shaft is provided with a limiting ring; the spring is sleeved on the connecting shaft, the outer end of the spring is contacted with the vertical plate, and the inner end of the spring is contacted with the limiting ring;
the inner end of the connecting shaft is provided with a threaded hole, and the outer end of the adjusting shaft is matched with the threaded hole.
The invention also provides a polishing method based on the multipurpose steel pipe end polishing device, which comprises the following steps:
step 1, adjusting the positions of the adjusting shafts to enable the distance between the outer end of each adjusting shaft and a polishing point on a polishing block to be equal to the radius of an inner hole of a pipe fitting to be polished;
step 2, the driving device drives the turntable to rotate forwards, the feeding mechanism drives the two groups of outer wall polishing assemblies and the inner hole polishing assemblies to be close to each other under the action of the first transmission mechanism, and meanwhile, the driving wheel of the outer wall polishing assembly drives the abrasive belt to move under the action of the second transmission mechanism;
step 3, after the inner ends of the adjusting shafts on the two sides are contacted with each other, the pipe to be polished is put in place under the movement of other conveying devices or manipulators, the inner hole of the pipe is sleeved on the outer side of the rotating polishing block, and the polishing block rotating along with the turntable starts to polish the inner hole;
step 4, the rotating disc continues to rotate forwards, the abrasive cloth belts on the two sides continue to be close to the outer wall of the pipe fitting and contact with the outer wall, and the outer wall is polished; in the process, the vertical plate of the bracket leaves the limit nut, the spring is compressed, and the grinding block is still contacted with the inner hole;
step 5, the driving device rotates reversely, the turntable rotates reversely, the two groups of outer wall polishing assemblies start to separate from the outer wall of the pipe fitting, and meanwhile, the compression amount of the spring starts to be reduced;
and 6, before the vertical plate of the support is contacted with the limiting nut, removing the polished pipe fitting, then putting the next pipe fitting to be polished in place, controlling the driving device to rotate in the forward direction, enabling the two groups of outer wall polishing assemblies to approach each other again, and then turning to the step 4 to start polishing the next pipe fitting.
Compared with the prior art, the invention has the following beneficial effects: (1) the device can realize synchronous polishing of the outer wall and the inner hole of the steel pipe, and the polishing efficiency is improved; (2) the device can be adjusted according to the pipe diameter and is suitable for steel pipes with different specifications; (3) the outer wall is polished in a mode of feeding while approaching and polishing, so that even if the abrasive belt is abraded, the polishing effect can be ensured by adjusting the feeding amount, and the utilization rate of the abrasive belt is improved; (4) the grinding of the outer wall and the inner hole and the rotation and feeding movement only need one set of driving device, and the equipment cost is low.
Drawings
FIG. 1 is a schematic structural view of the apparatus;
FIG. 2 is a schematic view of a portion of the turntable, the first transmission mechanism and the second transmission mechanism;
FIG. 3 is a schematic view of a fixed gear set, a first transmission and a second transmission;
FIG. 4 is a schematic view of the feed mechanism portion;
FIG. 5 is a schematic view of the carriage and adjustment plate of the feed mechanism, and portions of the outer wall grinding assembly;
FIG. 6 is a schematic view of the movable housing of the feed mechanism and a portion of the bore grinding assembly;
fig. 7 is a schematic diagram of the device for polishing a pipe fitting.
In the figure:
1. a motor; 2. a speed reducer; 3. a base; 4. a fixed gear set; 5. a turntable; 6. an outer wall polishing assembly; 7. polishing the inner hole; 8. a feed mechanism; 9. a second transmission mechanism; 10. a first transmission mechanism; 11. a pipe fitting; 41. a first fixed gear; 42. a second fixed gear; 61. a second pulley; 62. a driving wheel; 63. an abrasive belt; 64. a driven wheel; 71. a support; 72. grinding blocks; 73. a limit nut; 74. a spring; 75. an adjustment shaft; 76. a connecting shaft; 81. a mounting seat; 82. a second bevel gear; 83. a movable seat; 831. a first adjustment elongated slot; 84. a linear bearing; 85. a guide shaft; 86. an adjustment plate; 861. a second adjustment elongated slot; 87. a rotating bearing; 91. a fourth gear; 92. a first pulley; 93. a transmission belt; 101. a first gear; 102. a second gear; 103. a third gear; 104. a first bevel gear.
Detailed Description
The technical scheme of the invention is explained in detail in the following with the accompanying drawings:
referring to fig. 1, a multi-purpose steel pipe end grinding device comprises a base 3, a driving device, a turntable 5 and a fixed gear set 4. The fixed gear set 4 is mounted on the base 3 and is arranged concentrically with the turntable 5. The driving device comprises a motor 1 and a speed reducer 2, the motor 1 and the speed reducer 2 are installed on a base 3, and an output shaft of the speed reducer 2 penetrates through a fixed gear set 4 to be connected with a rotary table 5 so as to drive the rotary table 5 to rotate.
The device also comprises an outer wall grinding assembly 6, an inner hole grinding assembly 7, a first transmission mechanism 10, a second transmission mechanism 9 and a feeding mechanism 8.
And the outer wall grinding assembly 6 and the inner hole grinding assembly 7 are both arranged on the turntable 5 through a feeding mechanism 8.
The fixed gear set 4 is in transmission connection with the feeding mechanism 8 through a first transmission mechanism 10. The fixed gear set 4 is also in transmission connection with the outer wall grinding assembly 6 through a second transmission mechanism 9.
Furthermore, the outer wall polishing assembly 6, the inner hole polishing assembly 7, the first transmission mechanism 10 and the feeding mechanism 8 are two groups and are oppositely arranged on the turntable 5.
Specifically, as shown in fig. 2 and 3, the fixed gear set 4 includes a first fixed gear 41 and a second fixed gear 42.
The first transmission mechanism 10 includes a first gear 101, a second gear 102, a third gear 103, and a first bevel gear 104.
The first gear 101 and the second gear 102 are coaxially connected and are arranged on the rotating disc 5 in a rotating connection mode; the third gear 103 and the first bevel gear 104 are coaxially connected and are mounted on the rotating disc 5 in a rotating connection mode.
The first gear 101 is meshed with the second fixed gear 42, the second gear 102 is meshed with the third gear 103, and the first bevel gear 104 is used for being in transmission connection with the feeding mechanism 8.
As shown in fig. 4, the feeding mechanism 8 includes a mounting seat 81, a second bevel gear 82, a screw, and the moving seat 83.
The moving seat 83 is mounted on the mounting seat 81 through a linear bearing 84 and a guide shaft 85, the screw rod is matched with a nut mounted on the moving seat 83, and the second bevel gear 82 is mounted at the end of the screw rod and meshed with the first bevel gear 104.
Further, one end of the movable seat 83 is provided with a first elongated adjustment slot 831. The feeding mechanism 8 further comprises an adjusting plate 86, a second adjusting elongated slot 861 perpendicular to the feeding direction of the feeding mechanism 8 is formed in the adjusting plate 86, and the adjusting plate 86 is connected with the other end of the moving seat 83 through a bolt penetrating through the second adjusting elongated slot 861.
As shown in fig. 5, the outer wall sanding assembly 6 includes a driving wheel 62, a driven wheel 64, and a sanding belt 63 connected between the driving wheel 62 and the driven wheel 64, wherein the driving wheel 62 and the driven wheel 64 are both rotatably connected with a movable base 83 of the feeding mechanism 8.
Specifically, the wheel shaft of the driven wheel 64 passes through the first adjustment long-trough 831 and then is fixed on the movable seat 83 by a nut. The adjusting plate 86 is provided with a rotating bearing 87, and the driving wheel 62 is connected with the rotating bearing 87. The positions of the driving wheel 62 and the driven wheel 64 can be adjusted by the first adjustment slot 831 and the second adjustment slot 861.
As shown in fig. 2 and 3, the second transmission mechanism 9 includes two sets of fourth gears 91 respectively engaged with the first fixed gears 41 of the fixed gear set 4, and further includes first belt wheels 92 connected to the two sets of fourth gears 91 in a one-to-one correspondence manner, and the first belt wheels 92 are rotatably mounted on the turntable 5. The second transmission mechanism 9 further comprises a transmission belt 93 connected between the two sets of first pulleys 92, wherein the transmission belt 93 is a V-shaped belt and is arranged in a direction parallel to the feeding direction of the feeding mechanism 8.
The outer wall grinding assembly 6 further comprises a second belt wheel 61 connected with the driving wheel 62; the second pulley 61 is in contact engagement with the belt 93.
As shown in fig. 6, the bore grinding assembly 7 includes a bracket 71, a grinding block 72, a limit nut 73, a spring 74, an adjustment shaft 75 and a connecting shaft 76.
The bracket 71 is mounted on a movable base 83. The bracket 71 is L-shaped and comprises a flat plate and a vertical plate parallel to the axis of the turntable 5. The flat plate is provided with a long groove, and the bracket 71 is fixed on the movable seat 83 through a bolt penetrating through the long groove, so that the position adjustment of the bracket 71 can be realized. The outer end of the connecting shaft 76 penetrates through the vertical plate and the limiting nut 73 outwards and then is connected with the polishing block 72, and external threads on the connecting shaft 76 are matched with the limiting nut 73; the inner end of the connecting shaft 76 is provided with a limiting ring; the spring 74 is sleeved on the connecting shaft 76, the outer end of the spring is in contact with the vertical plate, the inner end of the spring is in contact with the limiting ring, and the connecting shaft 76 is pushed inwards to enable the limiting nut 73 to lean against the outer side of the vertical plate of the support 71.
The inner end of the connecting shaft 76 is provided with a threaded hole, and the outer end of the adjusting shaft 75 is matched with the threaded hole.
When the rotary table 5 rotates, the fixed gear set 4 drives the outer wall polishing assembly 6 and the inner hole polishing assembly 7 to move along the radial direction of the rotary table 5 through the first transmission mechanism 10 and the feeding mechanism 8, and simultaneously drives the driving wheel 62 of the outer wall polishing assembly 6 to rotate through the second transmission mechanism 9.
As shown in fig. 7, the method of polishing using the apparatus is as follows:
step 1, adjusting the positions of the adjusting shafts 75 to make the distance between the outer end of each adjusting shaft 75 and the polishing point on the polishing block 72 equal to the radius of the inner hole of the pipe fitting 11 to be polished.
Step 2, the driving device drives the turntable 5 to rotate positively, under the action of the first transmission mechanism 10, the feeding mechanism 8 drives the two sets of outer wall polishing assemblies 6 and the inner hole polishing assemblies 7 to be close to each other, and meanwhile, under the action of the second transmission mechanism 9, the driving wheel 62 of the outer wall polishing assembly 6 drives the abrasive belt 63 to move.
Assuming that the output of the speed reducer 2 is converted to n, the meshing transmission ratio of the second fixed gear 42 to the first gear 101 is i 1 The meshing transmission ratio of the second gear 102 to the third gear 103 is i 2 And if the lead of the screw rod of the feeding mechanism 8 is h, the speed v = (nh)/(i) of separating and closing the outer wall grinding assembly 6 1 i 2 )。
Let the transmission ratio of the first fixed gear 41 to the second pulley 61 be i 3 When the diameter of the driving wheel 62 is d, the linear speed e = pi dn/i of the abrasive belt 63 3
Step 3, after the inner ends of the adjusting shafts 75 at the two sides are contacted with each other, the pipe 11 to be polished is put in place under the movement of other conveying devices or manipulators, the inner hole of the pipe 11 is sleeved outside the rotating polishing block 72, and the polishing block 72 rotating along with the turntable 5 begins to polish the inner hole. At this time, the sanding point on sanding block 72 is just in full contact with the inner bore of pipe 11.
Step 4, the turntable 5 continues to rotate forwards, the abrasive belts 63 on the two sides continue to be close to the outer wall of the pipe fitting 11 and contact with the outer wall, and the outer wall is polished; in the process, the vertical plate of the bracket 71 leaves the limit nut 73, the spring 74 is compressed, the radial position of the polishing block 72 is kept unchanged and still contacts with the inner hole, and the inner hole is polished. In order to ensure the polishing effect and the steel pipe not to be damaged, the polishing block 72 should have certain flexibility and be made of abrasive cloth or steel wire.
And 5, reversely rotating the driving device, reversely rotating the turntable 5, separating the two groups of outer wall grinding assemblies 6 from the outer wall of the pipe fitting 11, and simultaneously reducing the compression amount of the spring 74.
And 6, before the vertical plate of the support 71 is contacted with the limiting nut 73, removing the polished pipe fitting 11, then putting the next pipe fitting 11 to be polished in place, controlling the driving device to rotate in the forward direction to enable the two groups of outer wall polishing assemblies 6 to approach each other again, and then turning to the step 4 to start polishing the next pipe fitting 11.

Claims (9)

1. The utility model provides a multipurpose steel pipe end grinding device, includes base (3), drive arrangement, carousel (5), outer wall polishing subassembly (6) and fixed gear train (4), drive arrangement installs on base (3) and drives carousel (5) rotate, fixed gear train (4) are installed on base (3) and are set up with carousel (5) are concentric, outer wall polishing subassembly (6) are followed carousel (5) are rotatory, its characterized in that: the inner hole grinding device also comprises an inner hole grinding assembly (7), a first transmission mechanism (10), a second transmission mechanism (9) and a feeding mechanism (8);
the outer wall grinding assembly (6) and the inner hole grinding assembly (7) are both arranged on the turntable (5) through a feeding mechanism (8);
the fixed gear set (4) is in transmission connection with the feeding mechanism (8) through a first transmission mechanism (10);
the outer wall polishing assembly (6) comprises a driving wheel (62), a driven wheel (64) and a polishing belt (63) connected between the driving wheel (62) and the driven wheel (64), and the driving wheel (62) and the driven wheel (64) are rotatably connected with a moving seat (83) of the feeding mechanism (8);
the fixed gear set (4) is also in transmission connection with the outer wall polishing assembly (6) through a second transmission mechanism (9);
when the turntable (5) rotates, the fixed gear set (4) drives the outer wall polishing assembly (6) and the inner hole polishing assembly (7) to move along the radial direction of the turntable (5) through the first transmission mechanism (10) and the feeding mechanism (8), and simultaneously drives the driving wheel (62) of the outer wall polishing assembly (6) to rotate through the second transmission mechanism (9).
2. The multi-purpose steel pipe end grinding device according to claim 1, wherein: the fixed gear set (4) includes a first fixed gear (41) and a second fixed gear (42).
3. The multi-purpose steel pipe end grinding device according to claim 2, wherein: the first transmission mechanism (10) comprises a first gear (101), a second gear (102), a third gear (103) and a first bevel gear (104);
the first gear (101) and the second gear (102) are coaxially connected and are arranged on the rotary table (5) in a rotating connection mode; the third gear (103) is coaxially connected with the first bevel gear (104) and is arranged on the rotary table (5) in a rotating connection mode;
the first gear (101) is meshed with the second fixed gear (42), the second gear (102) is meshed with the third gear (103), and the first bevel gear (104) is used for being in transmission connection with the feeding mechanism (8).
4. The multi-purpose steel pipe end grinding device according to claim 3, wherein: the feeding mechanism (8) comprises a mounting seat (81), a second bevel gear (82), a screw rod and the moving seat (83);
the movable seat (83) is installed on the installation seat (81) in a sliding fit mode, the screw rod is matched with a nut installed on the movable seat (83), and the second bevel gear (82) is installed at the end of the screw rod and meshed with the first bevel gear (104).
5. The multi-purpose steel pipe end grinding device according to claim 2, wherein: the second transmission mechanism (9) comprises two groups of fourth gears (91) which are respectively meshed with the first fixed gear (41) of the fixed gear set (4), and further comprises first belt wheels (92) which are correspondingly connected with the two groups of fourth gears (91), and the first belt wheels (92) are arranged on the turntable (5) in a rotating connection mode; the second transmission mechanism (9) further comprises a transmission belt (93) connected between the two groups of first belt wheels (92), and the arrangement direction of the transmission belt (93) is parallel to the feeding direction of the feeding mechanism (8);
the outer wall grinding assembly (6) further comprises a second belt wheel (61) connected with the driving wheel (62); the second belt wheel (61) is in contact fit with the transmission belt (93).
6. The multi-purpose steel pipe end grinding device as claimed in claim 5, wherein: the feeding mechanism (8) further comprises an adjusting plate (86), a second adjusting long groove (861) perpendicular to the feeding direction of the feeding mechanism (8) is formed in the adjusting plate (86), and the adjusting plate (86) is connected with the moving seat (83) through a bolt penetrating through the second adjusting long groove (861); the adjusting plate (86) is provided with a rotating bearing (87), and the driving wheel (62) is connected with the rotating bearing (87).
7. The multi-purpose steel pipe end grinding device according to claim 1, wherein: the outer wall polishing assembly (6), the inner hole polishing assembly (7), the first transmission mechanism (10) and the feeding mechanism (8) are respectively two groups and are oppositely arranged on the turntable (5).
8. The multi-purpose steel pipe end grinding device according to claim 7, wherein: the inner hole grinding assembly (7) comprises a support (71), a grinding block (72), a limiting nut (73), a spring (74), an adjusting shaft (75) and a connecting shaft (76);
the support (71) is arranged on the moving seat (83), and a vertical plate parallel to the axis of the turntable (5) is arranged on the support (71); the outer end of the connecting shaft (76) penetrates through the vertical plate and the limiting nut (73) outwards and then is connected with the polishing block (72), and external threads on the connecting shaft (76) are matched with the limiting nut (73); the inner end of the connecting shaft (76) is provided with a limiting ring; the spring (74) is sleeved on the connecting shaft (76), the outer end of the spring is in contact with the vertical plate, and the inner end of the spring is in contact with the limiting ring;
the inner end of the connecting shaft (76) is provided with a threaded hole, and the outer end of the adjusting shaft (75) is matched with the threaded hole.
9. The polishing method based on the multipurpose steel pipe end polishing device as claimed in claim 8, characterized by comprising the steps of:
step 1, adjusting the positions of the adjusting shafts (75) to enable the distance between the outer end of each adjusting shaft (75) and a polishing point on the polishing block (72) to be equal to the radius of an inner hole of a pipe fitting (11) to be polished;
step 2, a driving device drives a turntable (5) to rotate forwards, a feeding mechanism (8) drives two groups of outer wall polishing assemblies (6) and inner hole polishing assemblies (7) to approach each other under the action of a first transmission mechanism (10), and meanwhile, a driving wheel (62) of each outer wall polishing assembly (6) drives an abrasive belt (63) to move under the action of a second transmission mechanism (9);
step 3, after the inner ends of the adjusting shafts (75) on the two sides are contacted with each other, the pipe fitting (11) to be polished is in place under the movement of other conveying devices or manipulators, the inner hole of the pipe fitting (11) is sleeved on the outer side of the rotating polishing block (72), and the polishing block (72) rotating along with the turntable (5) starts to polish the inner hole;
step 4, the turntable (5) continues to rotate forwards, the abrasive cloth belts (63) on the two sides continue to be close to the outer wall of the pipe fitting (11) and contact with the outer wall, and the outer wall is polished; in the process, the vertical plate of the bracket (71) leaves the limit nut (73), the spring (74) is compressed, and the grinding block (72) is still contacted with the inner hole;
step 5, the driving device rotates reversely, the rotary table (5) rotates reversely, the two groups of outer wall grinding assemblies (6) start to separate from the outer wall of the pipe fitting (11), and meanwhile, the compression amount of the spring (74) starts to be reduced;
and 6, before the vertical plate of the support (71) is contacted with the limiting nut (73), removing the polished pipe fitting (11), then putting the next pipe fitting (11) to be polished in place, controlling the driving device to rotate in the forward direction, enabling the two groups of outer wall polishing assemblies (6) to approach each other again, and then turning to the step 4 to start polishing the next pipe fitting (11).
CN202210732732.4A 2022-06-27 2022-06-27 Multipurpose steel pipe end grinding device and method Active CN114800177B (en)

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