A rough polishing device for the inner wall of a nickel-titanium alloy thick tube

Abstract

The application discloses a nickel-titanium alloy thick pipe inner wall rough polishing device, which is provided with a cylindrical fixed inner liner capable of being closely sleeved on the outer side of a nickel-titanium alloy thick pipe to be polished, a sleeve with a closed bottom and an axle helical blade assembly capable of rotating around the sleeve axis, the sleeve is sleeved on the outer side of the fixed inner liner, the axle helical blade assembly is arranged inside the fixed inner liner, the axle axis of the axle helical blade assembly coincides with the sleeve axis, there is a gap between the axle helical blade assembly and the inner wall of the nickel-titanium alloy thick pipe to be polished in the horizontal direction, and the width of the gap is greater than the pipe wall thickness of the nickel-titanium alloy thick pipe to be polished. The nickel-titanium alloy thick pipe inner wall rough polishing device can uniformly polish burrs and roughness on the inner wall of the nickel-titanium alloy thick pipe, has high efficiency, is not easy to damage the inner wall of the pipe and can be used for batch rough polishing operation of nickel-titanium alloy pipes.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal material processing, in particular to a rough polishing device for the inner wall of a nickel-titanium alloy thick pipe. BACKGROUND

[0002] Nickel-titanium alloy has good shape memory effect, wear resistance, corrosion resistance, super-elasticity and biocompatibility, and is widely used in medical devices, aerospace, petroleum and chemical industries and other fields.

[0003] The nickel-titanium alloy thick pipe has an inner hole diameter of 9mm-100mm and a wall thickness of greater than or equal to 0.1mm. After processing to the final size, burrs and roughness defects often exist on the inner wall surface of the pipe. These defects not only affect the overall appearance of the pipe, but more importantly, they can increase the resistance to fluid flow in the pipe during use, increase friction and wear, or become a source of fatigue cracks, and even cause unnecessary irritation or damage to the contact position of the pipe.

[0004] In the traditional processing method of the inner hole of the nickel-titanium alloy thick pipe, burrs and roughness are usually treated by manual polishing or sand blasting. Although burrs can be removed and the roughness of the inner hole surface can be improved to some extent, the efficiency is low, the precision is poor, and the polishing and sand blasting processes can easily damage the pipe. SUMMARY

[0005] Therefore, it is necessary to provide a rough polishing device for the inner wall of a nickel-titanium alloy thick pipe to uniformly polish the burrs and roughness of the inner wall of the nickel-titanium alloy thick pipe, and the polishing device has high polishing efficiency and is not easy to damage the inner wall of the pipe, meeting the needs of industrial production.

[0006] The present application provides a rough polishing device for the inner wall of a nickel-titanium alloy thick pipe, which is provided with a cylindrical fixed lining that can be tightly sleeved on the outer side of the nickel-titanium alloy thick pipe to be polished, a sleeve with a closed bottom, and an axial helical fin assembly that can rotate around the axis of the sleeve. The sleeve is sleeved on the outer side of the fixed lining, the axial helical fin assembly is arranged inside the fixed lining, the axis of the axial helical fin assembly coincides with the axis of the sleeve, and there is a gap between the axial helical fin assembly and the inner wall of the nickel-titanium alloy thick pipe to be polished in the horizontal direction, and the width of the gap is greater than the wall thickness of the nickel-titanium alloy thick pipe to be polished.

[0007] In one embodiment, the rough polishing device for the inner wall of a nickel-titanium alloy thick pipe is further provided with a lifting mechanism, and the lifting mechanism is provided with an upper base plate, a plurality of support columns, a lower base plate, a guide rail, an upper lifting block and a lower lifting block.

[0008] The upper base plate and the lower base plate are parallel and fixedly connected to the upper and lower ends of the plurality of support columns, and the guide rail is fixedly arranged between the upper base plate and the lower base plate.

[0009] The upper lifting block and the lower lifting block are sleeved on the guide rail and can slide up and down along the guide rail;

[0010] The lower base is provided with a circular groove, and two mounting keys are horizontally arranged in the circular groove.

[0011] In one of the embodiments, the height of the fixed inner liner is equal to the length of the nickel-titanium alloy rough pipe to be polished, and the fixed inner liner comprises an upper inner liner and a lower inner liner, the upper inner liner is fixedly connected to the top of the lower inner liner, and the height ratio of the upper inner liner to the lower inner liner is 1:16-19;

[0012] A plurality of first through holes are uniformly arranged in the middle of the side wall of the lower inner liner along the axial direction, each first through hole vertically penetrates the side wall of the lower inner liner, a plurality of groups of second through holes equal in number to the first through holes are arranged in the side wall of the lower inner liner along the radial direction, each group of second through holes comprises a plurality of second through holes uniformly distributed along the vertical direction, each second through hole radially penetrates the side wall of the lower inner liner, and each first through hole communicates with all the second through holes in a group of second through holes;

[0013] A groove ring is arranged in the middle of the bottom of the upper inner liner, and each first through hole communicates with the groove ring;

[0014] A first air extraction hole is arranged on the outside of the sleeve, and the first air extraction hole communicates with the groove ring;

[0015] The sleeve and the second sleeve are both axially provided with a second air extraction hole, and the second air extraction hole communicates with the first air extraction hole;

[0016] The rotary rigid grinding device and the rotary flexible grinding device are both provided with an air extraction pump, and the air extraction pump communicates with the second air extraction hole.

[0017] In one of the embodiments, the shaft spiral piece assembly and the shaft cloth wheel rotating assembly are both provided with an upper spiral shaft, a lower spiral shaft, a top sealing piece, a bottom sealing piece, a spiral piece sleeved on the lower spiral shaft, and a plurality of fastening rods;

[0018] The upper spiral shaft and the lower spiral shaft are coaxial, and the top of the lower spiral shaft is threadedly connected with the bottom of the upper spiral shaft;

[0019] The top sealing piece and the bottom sealing piece are fixedly connected with the two ends of the lower spiral shaft respectively, the top sealing piece and the bottom sealing piece are both perpendicular to the axis of the lower spiral shaft, and the distance between the top sealing piece and the bottom sealing piece is equal to the length of the nickel-titanium alloy rough pipe to be polished;

[0020] The top sealing piece and the bottom sealing piece are both circular and have equal radii, the top sealing piece is composed of two semicircular plates, and the two semicircular plates are detachably assembled on the lower spiral shaft;

[0021] The top end of the lower spiral shaft extends out after penetrating the top blocking sheet, the bottom end of the lower spiral shaft extends out after penetrating the bottom blocking sheet, the top of the spiral sheet is fixedly connected with the bottom of the top blocking sheet, and the bottom of the spiral sheet is fixedly connected with the top of the bottom blocking sheet.

[0022] The maximum axial radius of the spiral sheet is smaller than the radius of the top blocking sheet.

[0023] The middle of each fastening rod is fixedly connected with the lower spiral shaft, and both ends of each fastening rod are fixedly connected with the spiral sheet.

[0024] In one of the embodiments, the inner wall rough polishing device of the nickel-titanium alloy rough pipe is further provided with a rotary motor component and a grinding auxiliary component, the rotary motor component is arranged above the grinding auxiliary component, the rotary motor component is fixedly connected with the upper lifting block, the grinding auxiliary component is fixedly connected with the lower lifting block, the rotation axis of the rotary motor component coincides with the axis of the shaft spiral sheet assembly, and the upper spiral shaft of the shaft spiral sheet assembly is fixedly connected with the rotary motor component.

[0025] The grinding auxiliary component comprises an auxiliary sleeve, an isolation pipe, a first sealing ring and a second sealing ring, and the auxiliary sleeve abuts against the top of the sleeve.

[0026] The auxiliary sleeve is sleeved outside the isolation pipe, the first sealing ring and the second sealing ring are arranged at the upper and lower ends of the auxiliary sleeve respectively, the first sealing ring and the second sealing ring are fixedly connected with the inner wall of the auxiliary sleeve, and the upper and lower ends of the isolation pipe abut against the first sealing ring and the second sealing ring respectively.

[0027] The top of the inner lining of the fixed inner lining abuts against the bottom of the second sealing ring.

[0028] In one of the embodiments, the bottom inside center of the sleeve is provided with a rotating hole, and the bottom end of the lower spiral shaft of the shaft spiral sheet assembly is inserted into the rotating hole.

[0029] The axial radius of the circular groove is equal to the axial radius of the sleeve, the bottom outside of the sleeve is provided with two installation grooves which can be matched and installed with the two installation keys respectively, the installation keys are embedded into the installation grooves, and the sleeve is inserted into the circular groove.

[0030] In one of the embodiments, the spiral sheet is made of stainless steel, carbon steel or manganese steel.

[0031] The nickel-titanium alloy rough pipe inner wall rough polishing device can realize automatic rough polishing of the pipe inner wall, can effectively remove burrs and rough defects on the nickel-titanium alloy rough pipe inner wall, can reduce the inner wall surface roughness, and has high polishing efficiency. In addition, the nickel-titanium alloy rough pipe can tightly adhere to and fix the inner lining, so that damage such as extrusion to the pipe outer wall in the polishing process can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 Fig. 1 is a schematic diagram of the overall structure of the inner wall rough polishing device for a nickel-titanium alloy rough pipe provided in an embodiment of the present application;

[0033] Figure 2 Fig. 2 is a schematic diagram of the cross-sectional structure of the inner wall rough polishing device for a nickel-titanium alloy rough pipe provided in an embodiment of the present application along the axis of the sleeve;

[0034] Figure 3 Fig. 3 is a schematic diagram of the structure of the lifting mechanism provided in an embodiment of the present application;

[0035] Figure 4 Fig. 4 is a schematic diagram of the structure of the fixed inner liner provided in an embodiment of the present application;

[0036] Figure 5 Fig. 5 is a schematic diagram of the cross-sectional structure of the fixed inner liner provided in an embodiment of the present application along the plane where the axis is located;

[0037] Figure 6 Fig. 6 is a schematic diagram of the structure of the shaft helical blade assembly provided in an embodiment of the present application;

[0038] Figure 7 Fig. 7 is a schematic diagram of the structure of the sleeve provided in an embodiment of the present application;

[0039] Figure 8 Fig. 8 is another schematic diagram of the structure of the sleeve provided in an embodiment of the present application.

[0040] BRIEF DESCRIPTION OF THE DRAWINGS: 100, fixed inner liner; 110, sleeve; 111, rotating hole; 112, mounting groove; 120, shaft helical blade assembly; 130, rotating motor component; 140, grinding auxiliary component; 141, auxiliary sleeve; 142, isolation tube; 143, first sealing ring; 144, second sealing ring; 300, lifting mechanism; 310, upper base plate; 320, support column; 330, lower base plate; 340, guide rail; 350, upper lifting block; 360, lower lifting block; 370, circular groove; 380, mounting key; 400, upper inner liner; 410, lower inner liner; 420, first through hole; 430, second through hole; 440, groove ring; 450, first air extraction hole; 460, second air extraction hole; 500, upper helical shaft; 510, lower helical shaft; 520, top blocking piece; 530, bottom blocking piece; 540, helical blade; 550, fastening rod. DETAILED DESCRIPTION

[0041] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0042] It should be noted that in the description of the present application, "upper", "lower", "top", "bottom", orientation or position relationship are based on the drawings.Figure 1 It is to be understood that the orientation terms shown or described are merely intended to facilitate the description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0043] In one embodiment, as shown in Figure 1 and Figure 2 The inner wall rough polishing device of the nickel-titanium alloy rough pipe in this embodiment is provided with a cylindrical fixed lining 100 that can be tightly sleeved on the outer side of the nickel-titanium alloy rough pipe to be polished, a sleeve 110 with a closed bottom, and an axial helical blade assembly 120 that can rotate around the axis of the sleeve 110. The sleeve 110 is sleeved on the outer side of the fixed lining 100, and the axial helical blade assembly 120 is arranged inside the fixed lining 100. The axis of the axial helical blade assembly 120 coincides with the axis of the sleeve 110. There is a gap between the axial helical blade assembly 120 and the inner wall of the nickel-titanium alloy rough pipe to be polished in the horizontal direction, and the width of the gap is greater than the pipe wall thickness of the nickel-titanium alloy rough pipe to be polished.

[0044] The axis of the axial helical blade assembly 120 coincides with the axis of the sleeve 110, and the sleeve 110 is sleeved on the outer side of the fixed lining 100, so that the axial helical blade assembly 120 can rotate along the axis inside the fixed lining 100. The width of the gap is greater than the pipe wall thickness of the nickel-titanium alloy rough pipe to be polished, which can ensure that the axial helical blade assembly 120 will not scratch the nickel-titanium alloy rough pipe during rotation.

[0045] The inner wall rough polishing device of the nickel-titanium alloy rough pipe in this embodiment can automatically rough polish the inner wall of the nickel-titanium alloy rough pipe, effectively remove the inner wall defects of the nickel-titanium alloy rough pipe, and reduce the surface roughness of the inner wall. The fixed lining 100 can be tightly sleeved on the outer side of the nickel-titanium alloy rough pipe to be polished, which can avoid damage to the outer wall of the pipe during polishing.

[0046] In one embodiment, as shown in Figure 3 The inner wall rough polishing device of the nickel-titanium alloy rough pipe is also provided with a lifting mechanism 300. The lifting mechanism 300 is provided with an upper base plate 310, a plurality of support columns 320, a lower base plate 330, a guide rail 340, an upper lifting block 350, and a lower lifting block 360.

[0047] The upper base plate 310 and the lower base plate 330 are parallel and vertically fixedly connected to the upper and lower ends of the plurality of support columns 320, and the guide rail 340 is vertically fixedly connected to the middle of the upper base plate 310 and the lower base plate 330. The upper lifting block 350 and the lower lifting block 360 are sleeved on the guide rail 340 and can slide up and down along the guide rail 340. The lower base plate 330 is provided with a circular groove 370 at the top, and two mounting keys 380 are horizontally arranged inside the circular groove 370. The depth of the circular groove 370 is half the thickness of the lower base plate 330.

[0048] Specifically, the upper substrate 310 and the lower substrate 330 of the lifting mechanism 300 are both rectangular metal plates and are arranged horizontally; the lifting mechanism 300 has four support columns 320, which are respectively connected at four corners of the upper substrate 310 and the lower substrate 330, and the four support columns 320, the upper substrate 310 and the lower substrate 330 are all perpendicular. The guide rail 340 is two sliding columns, each of which is arranged in the middle of two support columns 320, and the sliding column is perpendicular to the upper substrate 310 and the lower substrate 330. The upper lifting block 350 and the lower lifting block 360 both include a fixed ring and a fixed lug on both sides of the fixed ring, which is respectively sleeved with two sliding columns. The upper lifting block 350 and the lower lifting block 360 can slide up and down along the guide rail 340.

[0049] In this embodiment, the lower lifting block 360 and the upper lifting block 350 can move up and down at a certain speed under the control of the motor, and the specific type and structure of the motor are not limited.

[0050] In one embodiment, as shown in Figure 4 and Figure 5 The height of the fixed lining 100 is equal to the length of the nickel-titanium alloy rough pipe to be polished, and the fixed lining 100 includes an upper lining 400 and a lower lining 410. The upper lining 400 is fixedly connected to the top of the lower lining 410, and the height ratio of the upper lining 400 to the lower lining 410 is 1:16-19.

[0051] In this embodiment, the height ratio of the upper lining 400 to the lower lining 410 is specifically 1:19. The fixed lining 100 and the second lining 200 are both acid-resistant high polymer materials.

[0052] The side wall of the lower lining 410 is uniformly provided with a plurality of first through holes 420 along the axial direction, each first through hole 420 vertically penetrates the side wall of the lower lining 410, and the side wall of the lower lining 410 is provided with a plurality of groups of second through holes 430 along the radial direction, the number of groups of second through holes 430 is equal to the number of first through holes 420, each group of second through holes 430 includes a plurality of second through holes 430 uniformly distributed along the vertical direction, each second through hole 430 radially penetrates the side wall of the lower lining 410, and each first through hole 420 is in communication with all second through holes 430 in a group of second through holes 430.

[0053] Specifically, the diameter of the first through hole 420 and the second through hole 430 is 0.5-5mm.

[0054] The upper inner liner 400 is provided with a groove ring 440 in the middle of the bottom, and each first through hole 420 is communicated with the groove ring 440; the sidewall of the upper inner liner 400 is provided with a first air extraction hole 450, and the first air extraction hole 450 is communicated with the groove ring 440. The sleeve 110 and the second sleeve 210 are both axially provided with a second air extraction hole 460, and the second air extraction hole 460 is communicated with the first air extraction hole 450; the outer side of the sleeve 110 is provided with an air extraction pump, and the air extraction pump is communicated with the second air extraction hole 460.

[0055] In the embodiment, the first through hole 420, the second through hole 430, the groove ring 440, the first air extraction hole 450, the second air extraction hole 460 and the air extraction pump are all communicated to form an air extraction channel, so that when the air extraction pump is opened, the nickel-titanium alloy thick pipe can be tightly attached to the inner wall surface of the fixed inner liner 100 or the second inner liner 200, and damage to the outer wall of the pipe caused by the polishing process can be avoided.

[0056] In one embodiment, as shown in FIG. 1, the shaft spiral piece assembly 120 is provided with an upper spiral shaft 500, a lower spiral shaft 510, a top sealing piece 520, a bottom sealing piece 530, a spiral piece 540 sleeved on the lower spiral shaft 510 and a plurality of fastening rods 550. Figure 6

[0057] The top sealing piece 520 and the bottom sealing piece 530 are fixedly connected with the two ends of the lower spiral shaft 510 respectively, and the top sealing piece 520 and the bottom sealing piece 530 are both perpendicular to the axis of the lower spiral shaft 510, and the distance between the top sealing piece 520 and the bottom sealing piece 530 is equal to the length of the nickel-titanium alloy thick pipe to be polished.

[0058] The top sealing piece 520 and the bottom sealing piece 530 are both circular and have equal radii, so that the top sealing piece 520 and the bottom sealing piece 530 can seal the space in the middle of the fixed inner liner 100 or the second inner liner 200 during polishing, so as to avoid spilling of the grinding medium or the polishing liquid. The top sealing piece 520 is composed of two semicircular plates, and the two semicircular plates can be detachably assembled on the lower spiral shaft 510. The top sealing piece 520 is composed of two semicircular plates, which facilitates disassembly and assembly of the top sealing piece 520.

[0059] In the embodiment, the shaft spiral piece assembly 120 is also provided with a fastener for fixing the two semicircular plates, and the semicircular plates are fastened after being assembled on the lower spiral shaft 510.

[0060] The top end of the lower spiral shaft 510 penetrates the top sealing piece 520 and extends out, and the bottom end of the lower spiral shaft 510 penetrates the bottom sealing piece 530 and extends out. The top end of the lower spiral shaft 510 extends out for connection with the upper spiral shaft 500, and the bottom end of the lower spiral shaft 510 extends out for connection with the lifting mechanism 300.​

[0061] The top of the spiral piece 540 is fixedly connected with the bottom of the top blocking piece 520, and the bottom of the spiral piece 540 is fixedly connected with the top of the bottom blocking piece 530; the maximum axial radius of the spiral piece 540 is smaller than the radius of the top blocking piece 520; the middle of each fastening rod 550 is fixedly connected with the lower spiral shaft 510, and both ends of each fastening rod 550 are fixedly connected with the spiral piece 540. Specifically, the spiral piece (540) is made of stainless steel, carbon steel or manganese steel.

[0062] The fastening rod 550 is used to fix the spiral piece 540 and the lower spiral shaft 510.

[0063] In one embodiment, the inner wall rough polishing device of the nickel-titanium alloy rough pipe is further provided with a rotary motor member 130 and a grinding auxiliary member 140. The rotary motor member 130 is arranged above the grinding auxiliary member 140, the rotary motor member 130 is fixedly connected with the upper lifting block 350, the grinding auxiliary member 140 is fixedly connected with the lower lifting block 360, the rotation axis of the rotary motor member coincides with the axis of the shaft spiral piece assembly 120, and the upper spiral shaft 500 of the shaft spiral piece assembly 120 is fixedly connected with the rotary motor member 130. The rotary motor member 130 can drive the upper spiral shaft 500 of the rotary rigid grinding device to rotate.

[0064] The grinding auxiliary member 140 includes an auxiliary sleeve 141, an isolation pipe 142, a first sealing ring 143 and a second sealing ring 144. The auxiliary sleeve 141 abuts against the top of the sleeve. The sleeve is used to prevent the coarse-grained grinding medium from spilling when the shaft spiral piece assembly 120 rotates.

[0065] The auxiliary sleeve 141 is sleeved outside the isolation pipe 142, the first sealing ring 143 and the second sealing ring 144 are arranged at the upper and lower ends of the auxiliary sleeve 141 respectively, the first sealing ring 143 and the second sealing ring 144 are fixedly connected with the inner wall of the auxiliary sleeve 141, and the upper and lower ends of the isolation pipe 142 abut against the first sealing ring 143 and the second sealing ring 144 respectively; the top of the upper lining 400 of the fixed lining 100 and the bottom of the second sealing ring 144 abut against each other. The first sealing ring 143 and the second sealing ring 144 are used to install the isolation pipe 142, the isolation pipe 142 is made of wear-resistant material, and its function is to avoid damage to the auxiliary sleeve 141 by the coarse-grained grinding medium.

[0066] A rotary motor can be arranged inside the rotary motor member 130 to drive the upper spiral shaft 500 to rotate.

[0067] In one embodiment, as Figure 7 and Figure 8As shown, the bottom inner center of the sleeve 110 is provided with a rotating hole 111, and the bottom end of the lower helical shaft 510 of the shaft helical blade assembly 120 is inserted into the rotating hole 111;

[0068] The shaft radius of the circular groove 370 of the rotating rigid grinding device is equal to the shaft radius of the sleeve 110, the bottom outer side of the sleeve 110 is provided with two installation grooves 112 which can be respectively matched with two installation keys 380, the installation keys 380 are embedded into the installation grooves 112, and the sleeve 110 is inserted into the circular groove 370.

[0069] The installation keys 380 and the installation grooves 112 are used to avoid the rotation of the sleeve 110 relative to the lower base plate 330.

[0070] In a specific embodiment, the use method of the inner wall rough polishing device for the nickel-titanium alloy rough pipe is described by taking a nickel-titanium alloy rough pipe with a polished inner diameter of 20 mm, an outer diameter of 21 mm, and a pipe length of 1000 mm as an example. Before use, the nickel-titanium alloy rough pipe is cleaned and dried. The specific use method includes the following steps:

[0071] (1) Move the upper lifting block 350 and the lower lifting block 360 of the rotating rigid grinding device to lift the rotating motor component 130 and the grinding auxiliary component 140 upwards until the shaft helical blade assembly 120 is located in the middle of the grinding auxiliary component 140, and the distance between the grinding auxiliary component 140 and the sleeve 110 is greater than 1000 mm;

[0072] (2) Place the dried nickel-titanium alloy rough pipe to be polished into the fixed lining 100, start the air pump, and ensure that the nickel-titanium alloy rough pipe to be polished is adsorbed to the inner wall of the fixed lining 100;

[0073] (3) Move the lower lifting block 360 until the distance between the grinding auxiliary component 140 and the sleeve 110 is 150 mm;

[0074] (4) Move the upper lifting block 350 until the bottom end of the lower helical shaft 510 of the shaft helical blade assembly 120 is inserted into the rotating hole 111;

[0075] (5) Remove the top blocking plate of the shaft helical blade assembly 120;

[0076] (6) Start the rotating motor component 130, and control the rotating speed of the helical blade 540 to be 15 revolutions per minute;

[0077] (7) Add water and quartz sand with a particle size of 800 mesh into the nickel-titanium alloy rough pipe through the 150 mm gap between the grinding auxiliary component 140 and the sleeve 110, until the nickel-titanium alloy rough pipe is filled;

[0078] (8) Turn off the rotating electrical machine 130, install the top blocking piece 520 of the shaft helical blade assembly 120;

[0079] (9) Move the lower lifting block 360 until the grinding auxiliary member 140 abuts against the sleeve 110;

[0080] (10) Adjust the rotating speed of the rotating electrical machine 130, control the speed to be 150 rpm, and work for 5 minutes;

[0081] (11) Adjust the rotating speed of the rotating electrical machine 130 to be 15 rpm, move the upper lifting block 350 until the shaft helical blade assembly 120 moves into the grinding auxiliary member 140, and turn off the rotating electrical machine 130;

[0082] (12) Move the lower lifting block 360 until the grinding auxiliary member 140 moves to a distance greater than 1000 mm from the top surface of the sleeve 110;

[0083] (13) Take out the nickel-titanium alloy rough pipe to be polished.

[0084] The above method can effectively remove the inner wall burrs of the nickel-titanium alloy rough pipe and polish the inner wall flat.

[0085] The above-mentioned embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A device for coarse polishing the inner wall of a nickel-titanium alloy coarse tube, characterized in that, The device is provided with a cylindrical fixed lining (100) which can tightly sleeve the outside of the nickel-titanium alloy rough pipe to be polished, a sleeve (110) with a closed bottom and an axial helical blade assembly (120) which can rotate around the axis of the sleeve (110). The sleeve (110) sleeves the outside of the fixed lining (100), the axial helical blade assembly (120) is arranged inside the fixed lining (100), the axis of the axial helical blade assembly (120) coincides with the axis of the sleeve (110), the axial helical blade assembly (120) has a horizontal gap with the inner wall of the nickel-titanium alloy rough pipe to be polished, and the width of the gap is greater than the pipe wall thickness of the nickel-titanium alloy rough pipe to be polished. The height of the fixed lining (100) is equal to the length of the nickel-titanium alloy rough pipe to be polished, the fixed lining (100) comprises an upper lining (400) and a lower lining (410), the upper lining (400) is fixedly connected to the top of the lower lining (410), and the height ratio of the upper lining (400) to the lower lining (410) is 1:16-19. A plurality of first through holes (420) are uniformly arranged in the middle of the side wall of the lower lining (410) along the axial direction, each first through hole (420) vertically penetrates the side wall of the lower lining (410), a plurality of groups of second through holes (430) are arranged in the side wall of the lower lining (410) along the radial direction, the number of groups of the second through holes (430) is equal to the number of the first through holes (420), each group of the second through holes (430) comprises a plurality of second through holes (430) which are uniformly distributed along the vertical direction, each second through hole (430) radially penetrates the side wall of the lower lining (410), and each first through hole (420) is in communication with all the second through holes (430) in one group of the second through holes (430). A groove ring (440) is arranged in the middle of the bottom of the upper lining (400), and each first through hole (420) is in communication with the groove ring (440). A first air extraction hole (450) is arranged in the side wall of the upper lining (400), and the first air extraction hole (450) is in communication with the groove ring (440). A second air extraction hole (460) is arranged in the sleeve (110) in the axial direction, and the second air extraction hole (460) is in communication with the first air extraction hole (450). An air extraction pump is arranged outside the sleeve (110), and the air extraction pump is in communication with the second air extraction hole (460). The axial helical blade assembly (120) is provided with an upper helical shaft (500), a lower helical shaft (510), a top blocking piece (520), a bottom blocking piece (530), a helical blade (540) which sleeves the lower helical shaft (510) and a plurality of fastening rods (550). The upper helical shaft (500) and the lower helical shaft (510) are coaxial, and the top of the lower helical shaft (510) is threadedly connected with the bottom of the upper helical shaft (500). The top sealing sheet (520) and the bottom sealing sheet (530) are fixedly connected with two ends of the lower spiral shaft (510) respectively, the top sealing sheet (520) and the bottom sealing sheet (530) are perpendicular to the axis of the lower spiral shaft (510), and the distance between the top sealing sheet (520) and the bottom sealing sheet (530) is equal to the length of the nickel-titanium alloy rough pipe to be polished; The top sealing sheet (520) and the bottom sealing sheet (530) are circular and have equal radii, the top sealing sheet (520) is composed of two semicircular plates, and the two semicircular plates are detachably assembled on the lower spiral shaft (510); The top end of the lower spiral shaft (510) penetrates the top sealing sheet (520) and extends out, and the bottom end of the lower spiral shaft (510) penetrates the bottom sealing sheet (530) and extends out; The top of the spiral sheet (540) is fixedly connected with the bottom of the top sealing sheet (520), and the bottom of the spiral sheet (540) is fixedly connected with the top of the bottom sealing sheet (530); The maximum axial radius of the spiral sheet (540) is smaller than the radius of the top sealing sheet (520); The middle of each fastening rod (550) is fixedly connected with the lower spiral shaft (510), and the two ends of each fastening rod (550) are fixedly connected with the spiral sheet (540).

2. The apparatus for rough polishing the inner wall of a nickel-titanium alloy rough tube according to claim 1, wherein The nickel-titanium alloy rough pipe inner wall rough polishing device is also provided with a lifting mechanism (300), the lifting mechanism (300) is provided with an upper base plate (310), a plurality of support columns (320), a lower base plate (330), a guide rail (340), an upper lifting block (350) and a lower lifting block (360); The upper base plate (310) and the lower base plate (330) are fixedly connected in parallel and vertically on the upper and lower ends of the plurality of support columns (320), and the guide rail (340) is fixedly connected vertically in the middle of the upper base plate (310) and the lower base plate (330); The upper lifting block (350) and the lower lifting block (360) are sleeved on the guide rail (340) and can slide up and down along the guide rail (340); A circular groove (370) is arranged on the top of the lower base plate (330), and two mounting keys (380) are horizontally arranged in the circular groove (370).

3. The apparatus for rough polishing the inner wall of a nickel-titanium alloy rough tube according to claim 2, wherein The nickel-titanium alloy rough pipe inner wall rough polishing device is also provided with a rotary motor component (130) and a grinding auxiliary component (140), the rotary motor component (130) is arranged above the grinding auxiliary component (140), the rotary motor component (130) is fixedly connected with the upper lifting block (350), the grinding auxiliary component (140) is fixedly connected with the lower lifting block (360), the rotation axis of the rotary motor component coincides with the axis of the shaft spiral sheet assembly (120), and the upper spiral shaft (500) of the shaft spiral sheet assembly (120) is fixedly connected with the rotary motor component (130); The grinding auxiliary component (140) comprises an auxiliary sleeve (141), an isolation tube (142), a first sealing ring (143) and a second sealing ring (144), and the auxiliary sleeve (141) abuts against the top of the sleeve. The auxiliary sleeve (141) is sleeved outside the isolation tube (142), the first sealing ring (143) and the second sealing ring (144) are arranged at the upper end and the lower end of the auxiliary sleeve (141) respectively, the first sealing ring (143) and the second sealing ring (144) are fixedly connected with the inner wall of the auxiliary sleeve (141), and the upper end and the lower end of the isolation tube (142) abut against the first sealing ring (143) and the second sealing ring (144) respectively. The top of the upper inner liner (400) of the fixed inner liner (100) abuts against the bottom of the second sealing ring (144).

4. The apparatus for rough polishing the inner wall of a nickel-titanium alloy rough tube according to claim 3, wherein A rotating hole (111) is arranged at the center of the inner side of the bottom of the sleeve (110), and the bottom end of the lower spiral shaft (510) of the shaft spiral fin assembly (120) is inserted into the rotating hole (111); The axial radius of the circular groove (370) is equal to the axial radius of the sleeve (110), the bottom outer side of the sleeve (110) is provided with two installation grooves (112) which can be matched with two installation keys (380) respectively, the installation keys (380) are embedded into the installation grooves (112), and the sleeve (110) is inserted into the circular groove (370).

5. The apparatus for rough polishing the inner wall of a nickel-titanium alloy rough tube according to claim 1, wherein The material of the spiral fin (540) is stainless steel, carbon steel or manganese steel.

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