Rough polishing device for inner wall of nickel-titanium alloy thick pipe

Abstract

The invention discloses a rough polishing device for the inner wall of a nickel-titanium alloy thick pipe, which is provided with a cylindrical fixed lining capable of being tightly sleeved on the outer side of the nickel-titanium alloy thick pipe to be polished, a sleeve with a closed bottom and a shaft spiral piece assembly capable of rotating around the axis of the sleeve, and the sleeve is sleeved on the outer side of the fixed lining; the shaft spiral piece assembly is arranged in the fixing lining, the axis of the shaft spiral piece assembly coincides with the axis of the sleeve, a gap is formed between the shaft spiral piece assembly and the inner wall of the thick nickel-titanium alloy pipe to be polished in the horizontal direction, and the width of the gap is larger than the thickness of the pipe wall of the thick nickel-titanium alloy pipe to be polished. According to the rough polishing device for the inner wall of the nickel-titanium alloy thick pipe, burrs and roughness on the inner wall of the nickel-titanium alloy thick pipe can be evenly ground and roughly polished, the efficiency is high, the inner wall of the pipe is not prone to being damaged, and the rough polishing device can be used for batch production rough polishing operation of the nickel-titanium alloy pipe.

Description

Technical Field

[0001] The invention relates to the technical field of metal material processing, in particular to a device for rough polishing the inner wall of a thick nickel-titanium alloy tube. Background Art

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

[0003] The nickel-titanium alloy thick tube is a nickel-titanium alloy tube with an inner diameter of 9mm to 100mm and a wall thickness greater than or equal to 0.1mm. After being processed to the final size, its inner wall surface usually has burrs and roughness defects. These defects not only affect the overall aesthetics of the tube, but more importantly, they will create resistance to the flow of fluid in the tube during use, increase friction and wear, or become a source of fatigue cracks, and even cause unnecessary stimulation or damage to the contact position of the tube.

[0004] In the traditional method of processing the inner hole of nickel-titanium alloy thick tubes, manual grinding or sandblasting is usually used to deal with burrs and roughness. Although it can remove burrs and improve the roughness of the inner hole surface to a certain extent, it is inefficient and has poor precision. In addition, the grinding and sandblasting process can easily damage the tube. Summary of the invention

[0005] Based on this, it is necessary to provide a rough polishing device for the inner wall of a nickel-titanium alloy thick tube to address the above-mentioned technical problems, which can uniformly grind and roughly polish the burrs and roughness on the inner wall of the nickel-titanium alloy thick tube, and the polishing device has high polishing efficiency and is not easy to damage the inner wall of the tube, thus meeting the needs of industrial preparation.

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

[0007] In one embodiment, the inner wall rough polishing device of the thick nickel-titanium alloy tube is further provided with a lifting mechanism, and the lifting mechanism is provided with an upper base plate, a plurality of supporting 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 aligned vertically and fixedly connected to the upper and lower ends of a plurality of supporting columns, and the guide rail is vertically fixed in the middle of the upper base plate and the lower base plate;

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

[0010] A circular groove is arranged on the top of the lower base plate, and two installation keys are arranged horizontally inside the circular groove.

[0011] In one embodiment, the height of the fixed liner is equal to the length of the nickel-titanium alloy thick tube to be polished, the fixed liner includes an upper liner and a lower liner, the upper liner is fixedly connected to the top of the lower liner, and the ratio of the height of the upper liner to the height of the lower liner is 1:16-19;

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

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

[0014] A first air extraction hole is arranged on the outer side of the sleeve, and the first air extraction hole is communicated 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 is connected with the first air extraction hole;

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

[0017] In one embodiment, 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 blocking piece, a bottom blocking piece, a spiral piece sleeved on the lower spiral shaft, and a plurality of fastening rods;

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

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

[0020] The top blocking piece and the bottom blocking piece are both circular and have the same radius. The top blocking piece is composed of two semicircular plates, which can be detachably assembled on the lower spiral shaft.

[0021] The top end of the lower spiral shaft penetrates the top blocking piece and then extends out, the bottom end of the lower spiral shaft penetrates the bottom blocking piece and then extends out, the top of the spiral piece is fixedly connected to the bottom of the top blocking piece, and the bottom of the spiral piece is fixedly connected to the top of the bottom blocking piece;

[0022] The maximum axial radius of the spiral piece is smaller than the radius of the top plugging piece;

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

[0024] In one embodiment, the inner wall rough polishing device of the thick nickel-titanium alloy tube is further provided with a rotating motor component and a grinding auxiliary component, the rotating motor component is arranged above the grinding auxiliary component, the rotating motor component is fixedly connected to the upper lifting block, the grinding auxiliary component is fixedly connected to the lower lifting block, the rotation axis of the rotating 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 to the rotating motor component;

[0025] The grinding auxiliary component includes an auxiliary sleeve, an isolation tube, 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 on the outside of the isolation tube, the first sealing ring and the second sealing ring are respectively arranged at the upper and lower ends of the auxiliary sleeve, the first sealing ring and the second sealing ring are both fixedly connected to the inner wall of the auxiliary sleeve, and the upper and lower ends of the isolation tube are respectively abutted against the first sealing ring and the second sealing ring;

[0027] The top of the upper liner of the fixed liner abuts against the bottom of the second sealing ring.

[0028] In one embodiment, a rotation hole is provided at the inner center of the bottom of the sleeve, and the bottom end of the lower spiral shaft of the shaft spiral sheet assembly is inserted into the rotation hole;

[0029] The axial radius of the circular groove is equal to the axial radius of the sleeve. Two installation grooves which can be matched with two installation keys are arranged on the outer side of the bottom of the sleeve. The installation keys are embedded in the installation grooves, and the sleeve is inserted into the circular groove.

[0030] In one embodiment, the spiral blades are made of stainless steel, carbon steel or manganese steel.

[0031] Beneficial effects of the present invention: The rough polishing device for the inner wall of the thick nickel-titanium alloy tube of the present invention can realize automatic rough polishing of the inner wall of the tube, can effectively remove burrs and rough and uneven defects on the inner wall of the thick nickel-titanium alloy tube, reduce the surface roughness of the inner wall, and has a high polishing efficiency. In addition, the thick nickel-titanium alloy tube can be tightly attached to and fixed to the inner liner, which can avoid damage such as extrusion to the outer wall of the tube during the polishing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the inner wall rough polishing device of the nickel-titanium alloy thick tube provided in an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of a cross-sectional structure of the inner wall rough polishing device of the nickel-titanium alloy thick tube provided in an embodiment of the present invention along the axis of the sleeve;

[0034] Figure 3 It is a structural schematic diagram of a lifting mechanism provided in an embodiment of the present invention;

[0035] Figure 4 It is a schematic diagram of the structure of a fixed liner provided in an embodiment of the present invention;

[0036] Figure 5 This is one of the schematic cross-sectional structure diagrams of the fixed liner provided in an embodiment of the present invention along the plane where the axis is located;

[0037] Figure 6 It is a schematic diagram of the structure of the shaft spiral blade assembly provided in an embodiment of the present invention;

[0038] Figure 7 This is one of the structural schematic diagrams of the sleeve provided in an embodiment of the present invention;

[0039] Figure 8 Another perspective structural diagram of the sleeve provided in an embodiment of the present invention.

[0040] Description of reference numerals: 100, fixed liner; 110, sleeve; 111, rotating hole; 112, mounting groove; 120, shaft spiral sheet 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, supporting column; 330, lower base plate; 340, guide rail; 350, upper lifting block; 360, lower lifting block; 370, circular groove; 380, installation key; 400, upper lining; 410, lower lining; 420, first through hole; 430, second through hole; 440, groove ring; 450, first exhaust hole; 460, second exhaust hole; 500, upper spiral shaft; 510, lower spiral shaft; 520, top sealing piece; 530, bottom sealing piece; 540, spiral piece; 550, fastening rod. DETAILED DESCRIPTION

[0041] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0042] It should be noted that in the description of the present invention, “upper”, “lower”, “top”, “bottom”, orientation or position relationship is based on the attached Figure 1 Regarding the orientation or positional relationship shown, it should be understood that these orientation terms are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

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

[0044] The axis of the shaft spiral blade assembly 120 coincides with the axis of the sleeve 110, and the sleeve 110 is sleeved on the outside of the fixed liner 100, so that the shaft spiral blade assembly 120 can rotate along the axis inside the fixed liner 100. The width of the gap is greater than the wall thickness of the nickel-titanium alloy thick tube to be polished, which can ensure that the shaft spiral blade assembly 120 will not scratch the nickel-titanium alloy thick tube during rotation.

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

[0046] In one embodiment, if Figure 3 As shown, the inner wall rough polishing device of the nickel-titanium alloy thick tube is also provided with a lifting mechanism 300, and the lifting mechanism 300 is provided with an upper base plate 310, a plurality of supporting 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 aligned with each other and fixedly connected to the upper and lower ends of the plurality of support columns 320, and the guide rail 340 is vertically fixed between the upper base plate 310 and the lower base plate 330. The upper lifting block 350 and the lower lifting block 360 are both sleeved on the guide rail 340 and can slide up and down along the guide rail 340. A circular groove 370 is provided on the top of the lower base plate 330, and two installation keys 380 are horizontally provided 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 base plate 310 and the lower base plate 330 of the lifting mechanism 300 of this embodiment are both rectangular metal plates, which are arranged horizontally; the lifting mechanism 300 has four supporting columns 320, which are respectively connected at the four corners of the upper base plate 310 and the lower base plate 330, and the four supporting columns 320 are perpendicular to the upper base plate 310 and the lower base plate 330. The guide rail 340 is two sliding columns, each of which is arranged between the two supporting columns 320, and the sliding column is perpendicular to the upper base plate 310 and the lower base plate 330. The upper lifting block 350 and the lower lifting block 360 both include a fixed ring and fixed ears located on both sides of the fixed ring and slidably connected to the 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 be moved up and down at a certain speed by motor control, and the specific motor type and structure are not limited.

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

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

[0052] A plurality of first through holes 420 are evenly arranged along the axial direction in the middle portion of the side wall of the lower lining 410, and each first through hole 420 vertically penetrates the side wall of the lower lining 410. A plurality of groups of second through holes 430 equal in number to the first through holes 420 are arranged along the radial direction on the side wall of the lower lining 410, and each group of second through holes 430 includes a plurality of second through holes 430 evenly distributed along the vertical direction, and each second through hole 430 radially penetrates the side wall of the lower lining 410, and each first through hole 420 is connected to all the second through holes 430 in a group of second through holes 430.

[0053] Specifically, the diameters of the first through hole 420 and the second through hole 430 are both 0.5-5 mm.

[0054] A groove ring 440 is provided in the middle of the bottom of the upper liner 400, and each first through hole 420 is connected to the groove ring 440; a first air extraction hole 450 is provided on the side wall of the upper liner 400, and the first air extraction hole 450 is connected to 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 connected to the first air extraction hole 450; an air extraction pump is provided on the outer side of the sleeve 110, and the air extraction pump is connected to the second air extraction hole 460.

[0055] In the present embodiment, the first through hole 420, the second through hole 430, the groove ring 440, the first air pumping hole 450, the second air pumping hole 460 and the air pump are all connected to form an air pumping passage. When the air pump is turned on, the nickel-titanium alloy thick tube can be tightly fitted to the inner wall surface of the fixed liner 100 or the second liner 200, thereby avoiding damage to the outer wall of the tube during the polishing process.

[0056] In one embodiment, Figure 6 As shown, the shaft spiral sheet assembly 120 is provided with an upper spiral shaft 500, a lower spiral shaft 510, a top blocking sheet 520, a bottom blocking sheet 530, a spiral sheet 540 sleeved on the lower spiral shaft 510, and a plurality of fastening rods 550. The upper spiral shaft 500 is coaxial with the lower spiral shaft 510, and the top of the lower spiral shaft 510 is threadedly connected with the bottom of the upper spiral shaft 500.

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

[0058] The top blocking piece 520 and the bottom blocking piece 530 are both circular and have the same radius, so the top blocking piece 520 and the bottom blocking piece 530 can fix the space between the liner 100 or the second liner 200 to block during polishing to prevent the grinding medium or polishing liquid from spilling. The top blocking 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 blocking piece 520 is composed of two semicircular plates, which facilitates the disassembly and assembly of the top blocking piece 520.

[0059] In this embodiment, the shaft spiral blade assembly 120 is also provided with fasteners for fixing the two semicircular plates, and the semicircular plates are fastened after the two semicircular plates are assembled to the lower spiral shaft 510.

[0060] The top end of the lower spiral shaft 510 extends out after penetrating the top blocking piece 520, and the bottom end of the lower spiral shaft 510 extends out after penetrating the bottom blocking piece 530. The top end extending part of the lower spiral shaft 510 is connected to the upper spiral shaft 500, and the bottom end extending part is connected to the lifting mechanism 300.

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

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

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

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

[0065] The auxiliary sleeve 141 is sleeved on the outside of the isolation tube 142, and the first sealing ring 143 and the second sealing ring 144 are respectively arranged at the upper and lower ends of the auxiliary sleeve 141. The first sealing ring 143 and the second sealing ring 144 are both fixedly connected to the inner wall of the auxiliary sleeve 141, and the upper and lower ends of the isolation tube 142 are respectively abutted against the first sealing ring 143 and the second sealing ring 144; the top of the upper liner 400 of the fixed liner 100 is abutted against the bottom of the second sealing ring 144. The function of the first sealing ring 143 and the second sealing ring 144 is to install the isolation tube 142, and the material of the isolation tube 142 is wear-resistant material, and its function is to prevent the coarse-grained grinding medium from damaging the auxiliary sleeve 141.

[0066] The rotary motor may be disposed inside the rotary motor component 130 to drive the upper screw shaft 500 to rotate.

[0067] In one embodiment, if Figure 7 and Figure 8As shown, a rotation hole 111 is provided at the inner center of the bottom of the sleeve 110, and the bottom end of the lower spiral shaft 510 of the shaft spiral sheet assembly 120 is inserted into the rotation hole 111;

[0068] The axial radius of the circular groove 370 of the rotary rigid grinding device is equal to the axial radius of the sleeve 110. Two installation grooves 112 that can be matched with two installation keys 380 are set on the bottom outer side of the sleeve 110. The installation keys 380 are embedded in the installation grooves 112, and the sleeve 110 is inserted into the circular groove 370.

[0069] The function of the mounting key 380 and the mounting groove 112 is to prevent the sleeve 110 from rotating relative to the lower base plate 330 .

[0070] In a specific embodiment, the use method of the inner wall rough polishing device of the nickel-titanium alloy thick tube of the present invention is described by taking a nickel-titanium alloy thick tube to be polished with an inner diameter of 20 mm, an outer diameter of 21 mm, and a tube length of 1000 mm as an example. When used, the nickel-titanium alloy thick tube is first cleaned and dried. The specific use method includes the following steps:

[0071] (1) moving the upper lifting block 350 and the lower lifting block 360 of the rotary rigid grinding device, lifting the rotating motor component 130 and the grinding auxiliary component 140 upward, until the shaft spiral sheet 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) placing the dried nickel-titanium alloy thick tube to be polished into the fixed liner 100, and starting the vacuum pump to ensure that the nickel-titanium alloy thick tube to be polished is adsorbed onto the inner wall of the fixed liner 100;

[0073] (3) Move the lower lifting block 360 until the grinding auxiliary member 140 is 150 mm away from the sleeve 110;

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

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

[0076] (6) Start the rotating motor component 130 and control the rotation speed of the spiral blade 540 to 15 rpm;

[0077] (7) adding water and quartz sand with a particle size of 800 mesh to the nickel-titanium alloy thick tube to be polished through the 150 mm gap between the grinding auxiliary member 140 and the sleeve 110 until the nickel-titanium alloy thick tube is filled;

[0078] (8) Turn off the rotating motor component 130 and install the top sealing piece 520 of the shaft spiral piece 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 speed of the rotating motor component 130 to 150 rpm and continue working for 5 minutes;

[0081] (11) Adjust the rotation speed of the rotating motor component 130 to 15 rpm, move the upper lifting block 350 until the shaft spiral sheet assembly 120 moves into the grinding auxiliary component 140, and close the rotating motor component 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 thick tube to be polished.

[0084] The above method can effectively remove the burrs on the inner wall of the nickel-titanium alloy thick tube and grind the inner wall to be smooth.

[0085] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A rough polishing device for the inner wall of a nickel-titanium alloy thick tube, characterized in that: A cylindrical fixed liner (100) which can be tightly sleeved on the outside of a thick nickel-titanium alloy tube to be polished, a sleeve (110) with a closed bottom, and an axial spiral sheet assembly (120) which can rotate around the axis of the sleeve (110) are provided; The sleeve (110) is sleeved on the outside of the fixed liner (100), and the shaft spiral blade assembly (120) is arranged inside the fixed liner (100). The axis of the shaft spiral blade assembly (120) coincides with the axis of the sleeve (110). There is a gap in the horizontal direction between the shaft spiral blade assembly (120) and the inner wall of the thick nickel-titanium alloy tube to be polished, and the width of the gap is greater than the wall thickness of the thick nickel-titanium alloy tube to be polished.

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

3. The inner wall rough polishing device of the nickel-titanium alloy thick tube according to claim 2, characterized in that: The height of the fixed liner (100) is equal to the length of the nickel-titanium alloy thick tube to be polished, the fixed liner (100) comprises an upper liner (400) and a lower liner (410), the upper liner (400) is fixedly connected to the top of the lower liner (410), and the height ratio of the upper liner (400) to the lower liner (410) is 1:16-19; A plurality of first through holes (420) are evenly arranged in the middle of the side wall of the lower liner (410) along the axial direction, each first through hole (420) vertically penetrates the side wall of the lower liner (410), and a plurality of groups of second through holes (430) are arranged in the radial direction on the side wall of the lower liner (410), the number of which is equal to the number of the first through holes (420), each group of second through holes (430) includes a plurality of second through holes (430) evenly distributed in the vertical direction, each second through hole (430) radially penetrates the side wall of the lower liner (410), and each first through hole (420) is connected to all the second through holes (430) in a group of second through holes (430); A groove ring (440) is provided in the middle of the bottom of the upper liner (400), and each first through hole (420) is connected to the groove ring (440); The side wall of the upper 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) is 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); An air pump is disposed outside the sleeve (110), and the air pump is connected to the second air pumping hole (460).

4. The inner wall rough polishing device of the nickel-titanium alloy thick tube according to claim 3 is characterized in that: The shaft spiral sheet assembly (120) is provided with an upper spiral shaft (500), a lower spiral shaft (510), a top sealing sheet (520), a bottom sealing sheet (530), a spiral sheet (540) sleeved on the lower spiral shaft (510), and a plurality of fastening rods (550); The upper spiral shaft (500) and the lower spiral shaft (510) are coaxial, and the top of the lower spiral shaft (510) is threadedly connected to the bottom of the upper spiral shaft (500); The top blocking piece (520) and the bottom blocking piece (530) are respectively fixedly connected to the two ends of the lower spiral shaft (510), and the top blocking piece (520) and the bottom blocking piece (530) are both perpendicular to the axis of the lower spiral shaft (510), and the distance between the top blocking piece (520) and the bottom blocking piece (530) is equal to the length of the nickel-titanium alloy thick tube to be polished; The top blocking piece (520) and the bottom blocking piece (530) are both circular and have the same radius. The top blocking piece (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 piece (520) and then extends out, and the bottom end of the lower spiral shaft (510) penetrates the bottom sealing piece (530) and then extends out; The top of the spiral sheet (540) is fixedly connected to the bottom of the top sealing sheet (520), and the bottom of the spiral sheet (540) is fixedly connected to the top of the bottom sealing sheet (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 to the lower spiral shaft (510), and both ends of each fastening rod (550) are fixedly connected to the spiral sheet (540).

5. The inner wall rough polishing device of the nickel-titanium alloy thick tube according to claim 4, characterized in that: The inner wall rough polishing device of the nickel-titanium alloy thick tube is also provided with a rotating motor component (130) and a grinding auxiliary component (140), wherein the rotating motor component (130) is arranged above the grinding auxiliary component (140), the rotating motor component (130) is fixedly connected to the upper lifting block (350), the grinding auxiliary component (140) is fixedly connected to the lower lifting block (360), the rotation axis of the rotating 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 to the rotating 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); the auxiliary sleeve (141) abuts against the top of the sleeve; The auxiliary sleeve (141) is sleeved on the outside of the isolation tube (142); the first sealing ring (143) and the second sealing ring (144) are respectively arranged at the upper and lower ends of the auxiliary sleeve (141); the first sealing ring (143) and the second sealing ring (144) are both fixedly connected to the inner wall of the auxiliary sleeve (141); and the upper and lower ends of the isolation tube (142) are respectively abutted against the first sealing ring (143) and the second sealing ring (144); The top of the upper liner (400) of the fixed liner (100) abuts against the bottom of the second sealing ring (144).

6. The inner wall rough polishing device of the nickel-titanium alloy thick tube according to claim 5, characterized in that: A rotation hole (111) is provided at the inner center of the bottom of the sleeve (110), and the bottom end of the lower spiral shaft (510) of the shaft spiral sheet assembly (120) is inserted into the rotation hole (111); The axial radius of the circular groove (370) is equal to the axial radius of the sleeve (110), and two installation grooves (112) that can be matched with two installation keys (380) are arranged on the outer side of the bottom of the sleeve (110), and the installation keys (380) are embedded in the installation grooves (112), and the sleeve (110) is inserted into the circular groove (370).

7. The inner wall rough polishing device of the nickel-titanium alloy thick tube according to claim 4, characterized in that: The spiral blade (540) is made of stainless steel, carbon steel or manganese steel.

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