A catheter straightening device and method of use thereof

Abstract

The application discloses a catheter straightening device and a use method thereof, and relates to the technical field of machining.The specific embodiment of the application comprises a mandrel assembly, a pressing block assembly, a table-shaped support and a catheter displacement assembly; the pressing block assembly is arranged on the top of the table-shaped support, the mandrel assembly is arranged in the table-shaped support, and one end of the mandrel assembly is connected with the catheter displacement assembly.The thin-walled straight pipe automatic straightening device is used to straighten the catheter to be straightened through an electric control system, so that automatic machining is realized, the labor intensity is low, the production efficiency is high, the straightening precision is high, and the straightening quality is stable.

Description

Technical Field

[0001] This invention belongs to the field of machining technology, and in particular relates to a conduit straightening device and its usage method. Background Technology

[0002] In aviation equipment, conduits are required. Some conduits (such as ring control conduits) are typically formed from thin-walled straight tubes (≤1mm) before being welded to other tubes or end fittings, or undergoing end forming. The existing method for forming thin-walled straight tubes is as follows: First, the thin-walled straight tube is mounted on a mandrel. Then, simple tools such as a hammer and rubber mat are used to straighten the area to be formed to the target shape. Hand-held tool forming makes it difficult to control the uniformity of tube deformation. Localized forming areas may develop micro-cracks due to severe deformation, resulting in low forming accuracy and potential quality issues. Previously, due to the lack of automatic forming devices and methods for thin-walled straight tubes, forming was done manually. This method is labor-intensive, inefficient, and the forming quality heavily relies on the operator's skill level, leading to poor quality stability. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides an automatic straightening device and method for thin-walled straight tubes. This device and method have low labor intensity, high production efficiency, high straightening accuracy, and stable straightening quality.

[0004] In view of the above, according to one aspect of the present invention, a catheter alignment device is provided, including a mandrel assembly 4, a pressure block assembly 5, a table-shaped support 6, and a catheter displacement assembly 7; the pressure block assembly 5 is mounted on the top of the table-shaped support 6, the mandrel assembly 4 passes through the table-shaped support 6, and one end is connected to the catheter displacement assembly 7; the mandrel assembly 4 further includes a mandrel bracket 13, a bearing 12, and a mandrel 14, the bearing 12 is installed in the inner hole of the mandrel bracket 13, and one end of the mandrel 12 passes through the inner hole of the bearing and is radially fixed; the catheter displacement assembly 7 further includes a chuck 21, a floating support 22, a chuck motor 23, a return spring 24, and a support 25, the chuck motor 23 is fixed to the right end face of the floating support 22, and the chuck motor 24 is fixed to the right end face of the floating support 22. The rotating shaft of the machine 23 is connected to the chuck 21 fixed on the left end face of the floating bracket 22 after passing through the motor shaft hole 22a of the floating bracket 22, and drives the chuck 21 to rotate. The inner and outer sides of the floating bracket 22 are installed in the bracket slide groove 25c of the support 25. The bottom of the floating bracket 22 is supported by the return spring 24. The bottom of the return spring 24 is installed in the spring mounting hole 25b of the support 25. The spindle 12 passes through the chuck 21 and is suspended. The pressing block assembly 5 includes a servo electric cylinder 15, a shaft 16 and a pressing block 17. The servo electric cylinder 15 is connected to the shaft 16 and is used to drive the shaft 16 to move up and down reciprocally. The lower end of the shaft 16 is axially connected to the middle part of the pressing block 17. The spindle 14 is located below the projection of the pressing block 17.

[0005] Optionally, it also includes a frame 2 for securing the mandrel assembly 4, the table support 6, and the guide tube displacement assembly 7.

[0006] Optionally, it also includes a wheel assembly 1, which is fixed to the bottom of the frame 2.

[0007] Optionally, it also includes an electrical cabinet 3, which is installed in the middle of the rack 2.

[0008] Optionally, the spindle assembly 4 also includes a spindle end cap 8, a motor mounting base 9, a reducer 10, and a spindle motor 11. The left end of the spindle 14 is fixed to the motor mounting base 9 through the spindle end cap 8. The reducer 10 is installed in the inner hole of the motor mounting base 9. The left end of the reducer 10 is fixed to the motor mounting base 9, and the spindle motor 11 is fixedly installed on the lower side of the right end. The spindle motor 11 drives the spindle 14 to rotate through the reducer 10.

[0009] Optionally, the pressure block assembly 5 also includes a root pin 18 and a retaining ring 19. The lower end of the shaft 16 has a through groove 16a, and the two sides of the groove 16a are lugs 16b. The pin 18 is fixed to the shaft 16 by the retaining ring 19. The middle part of the pin 18 passes through the inner hole 17a of the pressure block 17, so that the pressure block 17 is limited in the groove 16a of the shaft 16. At the same time, the inner hole 17a of the pressure block 17 and the pin 18 are clearance fit, so that the pressure block 17 can rotate around the pin 18.

[0010] Optionally, the mandrel 14 is cylindrical, and its surface along the axial direction is provided with a plane 14a.

[0011] Optionally, the spindle motor 5 rotates in the opposite direction to the chuck motor 23.

[0012] According to another aspect of the present invention, a method of using a catheter alignment device is provided, wherein using any of the devices includes:

[0013] Step 1: Adjust the mandrel assembly 4 so that the mandrel plane 14a is aligned directly below the pressure block 17;

[0014] Step 2: Fit the conduit to be processed onto the mandrel 14, place the weld seam of the conduit at the position of the mandrel plane 14a, and clamp the conduit with the chuck 21;

[0015] Step 3: Turn on the servo electric cylinder and press down the pressure block 17 to hammer and shape the guide tube;

[0016] Step 4: Turn on the chuck motor 23, so that the guide tube is rotated while being hammered for shaping. Through the device and method of this invention, key quality indicators such as straightness and roundness of the guide tube can be adjusted by the automatic control system, eliminating interference from human factors, resulting in high shaping accuracy and stable shaping quality. Using electric shaping instead of manual shaping reduces the operator's labor intensity and increases production efficiency. When shaping thin-walled straight tubes of different diameters according to actual production needs, only the corresponding mandrel specification needs to be changed, making it highly versatile. When using the automatic thin-walled straight tube shaping device to shape the guide tube, simply place the straight tube on the mandrel and start the motor drive to achieve automatic shaping; the operation process is easy to master. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a catheter alignment device according to an embodiment of the present invention;

[0018] Figures 2a-2b This is a schematic diagram of the mandrel assembly of a catheter straightening device according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the pressure block assembly of a catheter alignment device according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the catheter displacement assembly of a catheter alignment device according to an embodiment of the present invention;

[0021] Explanation of reference numerals in the attached figures:

[0022] 1-Wheel assembly, 2-Frame, 3-Electrical cabinet, 4-Mandrel assembly, 5-Pressure block assembly, 6-Table-shaped support, 7-Conduit positioning assembly, 8-Mandrel end cover, 9-Motor mounting base, 10-Reducer, 11-Mandrel motor, 12-Bearing, 13-Mandrel bracket, 14-Mandrel, 14a-Mandrel plane, 15-Servo cylinder, 16-Shaft, 16a-Slot, 16b-Ear, 17-Pressure block, 17a-Inner hole, 18-Pin, 19-Retaining ring, 20-Conduit to be shaped, 21-Three-jaw chuck, 21a-Adjusting handle, 22-Floating bracket, 22a-Motor shaft hole, 23-Chuck motor, 24-Reset spring, 25-Support, 25a-Support mounting hole, 25b-Spring mounting hole, 25c-Support slide groove. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] A catheter alignment device includes a mandrel assembly 4, a pressure block assembly 5, a table-shaped support 6, and a catheter displacement assembly 7. The pressure block assembly 5 is mounted on the top of the table-shaped support 6, and the mandrel assembly 4 passes through the table-shaped support 6, with one end connected to the catheter displacement assembly 7. The mandrel assembly 4 also includes a mandrel bracket 13, a bearing 12, and a mandrel 14. The bearing 12 is installed in the inner hole of the mandrel bracket 13, and one end of the mandrel 12 passes through the inner hole of the bearing and is radially fixed. The catheter displacement assembly 7 also includes a chuck 21, a floating support 22, a chuck motor 23, a return spring 24, and a support 25. The chuck motor 23 is fixed to the right end face of the floating support 22, and the shaft of the chuck motor 23 is connected to the floating support 25. The motor shaft hole 22a of the frame 22 is connected to the chuck 21 fixed on the left end face of the floating bracket 22, and drives the chuck 21 to rotate. The inner and outer sides of the floating bracket 22 are installed in the bracket slide groove 25c of the support 25. The bottom of the floating bracket 22 is supported by the return spring 24. The bottom of the return spring 24 is installed in the spring mounting hole 25b of the support 25. The spindle 12 passes through the chuck 21 and is suspended. The pressure block assembly 5 includes a servo electric cylinder 15, a shaft 16 and a pressure block 17. The servo electric cylinder 15 is connected to the shaft 16 and is used to drive the shaft 16 to move up and down. The lower end of the shaft 16 is axially connected to the middle part of the pressure block 17. The spindle 14 is located below the projection of the pressure block 17.

[0025] Furthermore, it also includes a frame 2 for fixing the mandrel assembly 4, the table-shaped support 6, and the guide tube displacement assembly 7.

[0026] Furthermore, it also includes a wheel assembly 1, which is fixed to the bottom of the frame 2.

[0027] Furthermore, it also includes an electrical cabinet 3, which is installed in the middle of the rack 2.

[0028] Furthermore, the spindle assembly 4 also includes a spindle end cap 8, a motor mounting base 9, a reducer 10, and a spindle motor 11. The left end of the spindle 14 is fixed to the motor mounting base 9 through the spindle end cap 8. The reducer 10 is installed in the inner hole of the motor mounting base 9. The left end of the reducer 10 is fixed to the motor mounting base 9, and the spindle motor 11 is fixedly installed on the lower side of the right end. The spindle motor 11 drives the spindle 14 to rotate through the reducer 10.

[0029] Furthermore, the pressure block assembly 5 also includes a root pin 18 and a retaining ring 19. The lower end of the shaft 16 has a through groove 16a, and the two sides of the groove 16a are lugs 16b. The pin 18 is fixed to the shaft 16 by the retaining ring 19. The middle part of the pin 18 passes through the inner hole 17a of the pressure block 17, so that the pressure block 17 is limited in the groove 16a of the shaft 16. At the same time, the inner hole 17a of the pressure block 17 and the pin 18 are in clearance fit, so that the pressure block 17 can rotate around the pin 18.

[0030] Furthermore, the mandrel 14 is cylindrical, and its surface along the axial direction has a plane 14a.

[0031] Furthermore, the spindle motor 5 rotates in the opposite direction to the chuck motor 23.

[0032] According to another aspect of the present invention, a method of using a catheter alignment device is provided, wherein using any of the devices includes:

[0033] Step 1: Adjust the mandrel assembly 4 so that the mandrel plane 14a is aligned directly below the pressure block 17;

[0034] Step 2: Fit the conduit to be processed onto the mandrel 14, place the weld seam of the conduit at the position of the mandrel plane 14a, and clamp the conduit with the chuck 21;

[0035] Step 3: Turn on the servo electric cylinder and press down the pressure block 17 to hammer and shape the guide tube;

[0036] Step 4: Turn on the chuck motor 23 so that the guide tube is rotated while being hammered to shape it.

[0037] Example 1

[0038] like Figure 1-4 As shown, a thin-walled straight conduit straightening device includes a wheel assembly, a frame, an electrical cabinet, a mandrel assembly, a pressure block assembly, and a conduit positioning assembly. The wheel assembly is fixed to the bottom of the frame; the electrical cabinet is installed in the middle of the frame; the top of the frame is fixedly connected to the mandrel assembly, the table-shaped support, and the conduit positioning assembly from left to right; the bottom of the table-shaped support is fixed to the center of the top of the frame, and the pressure block assembly is installed on the top; the mandrel assembly includes one mandrel and one mandrel motor; the conduit positioning assembly includes one three-jaw chuck, one adjusting handle 21a, and one chuck motor.

[0039] Furthermore, the mandrel assembly includes a mandrel end cap, a motor mounting base, a reducer, a mandrel motor, a bearing, and a mandrel bracket. The left end of the mandrel is fixed to the motor mounting base via the mandrel end cap. The reducer is installed in the inner hole of the motor mounting base, with its left end fixed to the motor mounting base. The mandrel motor is fixedly mounted on the lower right side of the reducer, and the mandrel motor drives the mandrel to rotate through the reducer. A mandrel bracket is installed on the right side of the motor mounting base, and a bearing is installed in the inner hole of the mandrel bracket. The mandrel passes through the inner hole of the bearing and is radially fixed.

[0040] Furthermore, the catheter displacement assembly includes one catheter to be shaped, one three-jaw chuck, one floating support, one chuck motor, two return springs, and one support. The chuck motor is fixed to the right end face of the floating support. The chuck motor's shaft passes through the motor shaft hole of the floating support and connects to the three-jaw chuck fixed to the left end face of the floating support, driving the three-jaw chuck to rotate. The inner and outer sides of the floating support are installed in the support grooves of the support. The bottom of the floating support is supported by return springs, the bottoms of which are installed in the spring mounting holes of the support.

[0041] Furthermore, the pressure block assembly includes a servo electric cylinder, a shaft, a pressure block, a pin, and two retaining rings. The servo electric cylinder is connected to the shaft, and a through groove is opened at the lower end of the shaft. The groove has lugs on both sides. The pin is fixed to the shaft by the retaining rings. The middle part of the pin passes through the inner hole of the pressure block, so that the pressure block is confined in the groove of the shaft. At the same time, the inner hole of the pressure block and the pin are in clearance fit, and the pressure block can rotate around the pin.

[0042] An automatic straightening method for thin-walled straight pipes, using the aforementioned thin-walled straight pipe straightening device, includes the following steps:

[0043] Step 1: Adjust the mandrel assembly so that the center pressure block of the mandrel is directly below it;

[0044] Step 2: After mounting the conduit to be processed on the mandrel, adjust the conduit to the appropriate position (the longitudinal weld of the conduit must be located directly below the pressure block), and then use the adjusting handle 21a to securely clamp the conduit in the three-jaw chuck.

[0045] Step 3: According to the guide tube alignment requirements, adjust the alignment process parameters in the system, such as the alignment pressure of the servo electric cylinder, the impact frequency of the pressure block, the spindle speed, and the speed of the three-jaw chuck, or directly call the existing guide tube alignment parameters.

[0046] Step 4: Press the "pneumatic" button of the thin-walled straight tube automatic straightening device. The mandrel and three-jaw chuck rotate according to the preset straightening parameters, and the pressure block moves downward to deform the tube to be straightened between the mandrel and the pressure block according to the predetermined target, thus achieving the straightening.

[0047] Furthermore, step four is controlled by an electronic control system;

[0048] Furthermore, the electrical control system includes a conduit straightening program and a straightening parameter library. The straightening parameter library contains straightening parameters for thin-walled straight pipes of various materials, pipe diameters, and pipe wall thicknesses. The straight pipe straightening program automatically controls the straightening pressure, mandrel speed, three-jaw chuck speed, and straightening cycle according to the preset straightening parameters.

[0049] Example 2

[0050] An automatic straightening device for thin-walled straight pipes includes a mandrel support assembly 1, a wheel assembly 2, a frame 3, an electrical cabinet 4, a mandrel assembly 5, a pressure block assembly 6, a table-shaped support 7, and a conduit displacement assembly. The wheel assembly 1 is fixed to the bottom of the frame 2. The electrical cabinet 3 is installed in the middle of the frame. The top of the frame 2 is fixedly connected to the mandrel assembly 4, the table-shaped support 6, and the conduit displacement assembly 7 from left to right. The bottom of the table-shaped support 6 is fixed to the center of the top of the frame 2, and the pressure block assembly 5 is installed on the top.

[0051] The spindle assembly 4 includes a spindle end cap 8, a motor mounting base 9, a reducer 10, a spindle motor 11, a bearing 12, and a spindle bracket 13. The left end of the spindle 14 is fixed to the motor mounting base 9 via the spindle end cap 8. The reducer 10 is installed in the inner hole of the motor mounting base 9. The left end of the reducer 10 is fixed to the motor mounting base 9, and the spindle motor 11 is fixedly installed on the lower right side. The spindle motor 11 drives the spindle 14 to rotate through the reducer 10. The spindle bracket 13 is installed on the right side of the motor mounting base 9. The bearing 12 is installed in the inner hole of the spindle bracket 13, and the spindle 12 is radially fixed by passing through the inner hole of the bearing.

[0052] The catheter displacement assembly 7 includes a catheter to be shaped 20, a three-jaw chuck 21, a floating support 22, a chuck motor 23, two return springs 24, and a support 25. The chuck motor 23 is fixed to the right end face of the floating support 22. The rotating shaft of the chuck motor 23 is connected to the three-jaw chuck 21 fixed to the left end face of the floating support 22 through the motor shaft hole 22a of the floating support 22, and drives the three-jaw chuck 21 to rotate. The inner and outer sides of the floating support 22 are installed in the support groove 25c of the support 25. The bottom of the floating support 22 is supported by the return springs 24, and the bottom of the return springs 24 is installed in the spring mounting hole 25b of the support 25.

[0053] The pressure block assembly 5 includes a servo electric cylinder 15, a shaft 16, a pressure block 17, a pin 18, and two retaining rings 19. The servo electric cylinder 15 is connected to the shaft 16. The lower end of the shaft 16 has a through groove 16a, and the two sides of the groove 16a are lugs 16b. The pin 18 is fixed to the shaft 16 by the retaining rings 19. The middle part of the pin 18 passes through the inner hole 17a of the pressure block 17, so that the pressure block 17 is confined in the groove 16a of the shaft 16. At the same time, the inner hole 17a of the pressure block 17 and the pin 18 are in clearance fit, and the pressure block 17 can rotate around the pin 18.

[0054] The method of the present invention is an automatic shaping method for thin-walled straight tubes, using the above-mentioned automatic shaping device for thin-walled straight tubes, and includes the following steps:

[0055] Step 1: Adjust the mandrel assembly so that the center pressure block of the mandrel is directly below it;

[0056] Step 2: After mounting the conduit to be processed on the mandrel, adjust the conduit to the appropriate position (the longitudinal weld of the conduit must be located directly below the pressure block), and then use the adjusting handle 21a to securely clamp the conduit in the three-jaw chuck.

[0057] Step 3: According to the guide tube alignment requirements, adjust the alignment process parameters in the system, such as the alignment pressure of the servo electric cylinder, the impact frequency of the pressure block, the spindle speed, and the speed of the three-jaw chuck, or directly call the existing guide tube alignment parameters.

[0058] Step 4: Press the "pneumatic" button of the thin-walled straight tube automatic straightening device. The mandrel and three-jaw chuck rotate according to the preset straightening parameters, and the pressure block moves downward to deform the tube to be straightened between the mandrel and the pressure block according to the predetermined target, thus achieving the straightening.

[0059] The above description is merely a specific embodiment of the present invention, providing a detailed description of the invention. Parts not covered herein are conventional techniques. However, the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. The scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A catheter alignment device, characterized in that, include: Mandrel assembly (4), pressure block assembly (5), table-shaped support (6) and conduit displacement assembly (7); the table-shaped support (6) is equipped with pressure block assembly (5) on top, and mandrel assembly (4) is inserted into table-shaped support (6) with one end connected to conduit displacement assembly (7); The mandrel assembly (4) also includes a mandrel bracket (13), a bearing (12) and a mandrel (14). The bearing (12) is installed in the inner hole of the mandrel bracket (13), and one end of the mandrel (14) passes through the inner hole of the bearing and is radially fixed. The catheter displacement assembly (7) also includes a chuck (21), a floating support (22), a chuck motor (23), a return spring (24), and a support (25). The chuck motor (23) is fixed to the right end face of the floating support (22). The rotating shaft of the chuck motor (23) is connected to the chuck (21) fixed to the left end face of the floating support (22) through the motor shaft hole (22a) of the floating support (22), and drives the chuck (21) to rotate. The inner and outer sides of the floating support (22) are installed in the support groove (25c) of the support (25). The bottom of the floating support (22) is supported by the return spring (24). The bottom of the return spring (24) is installed in the spring mounting hole (25b) of the support (25). The spindle (14) passes through the chuck (21) and is suspended. The pressing block assembly (5) includes a servo electric cylinder (15), a shaft (16) and a pressing block (17). The servo electric cylinder (15) is connected to the shaft (16) and is used to drive the shaft (16) to move up and down reciprocally. The lower end of the shaft (16) is axially connected to the middle part of the pressing block (17). The spindle (14) is located below the projection of the pressing block (17). The spindle (14) is cylindrical and has a flat surface (14a) on its surface along the axial direction.

2. The apparatus according to claim 1, characterized in that, It also includes a frame (2) for fixing the mandrel assembly (4), the table support (6) and the guide tube displacement assembly (7).

3. The apparatus according to claim 2, characterized in that, It also includes a wheel assembly (1), which is fixed to the bottom of the frame (2).

4. The apparatus according to claim 2, characterized in that, It also includes an electrical cabinet (3), which is installed in the middle of the rack (2).

5. The apparatus according to claim 1, characterized in that, The spindle assembly (4) also includes a spindle end cap (8), a motor mounting base (9), a reducer (10) and a spindle motor (11). The left end of the spindle (14) is fixed to the motor mounting base (9) through the spindle end cap (8). The reducer (10) is installed in the inner hole of the motor mounting base (9). The left end of the reducer (10) is fixed to the motor mounting base (9), and the spindle motor (11) is fixedly installed on the lower side of the right end. The spindle motor (11) drives the spindle (14) to rotate through the reducer (10).

6. The apparatus according to claim 1, characterized in that, The pressure block assembly (5) also includes a pin (18) and a retaining ring (19). The lower end of the shaft (16) has a through groove (16a) with lugs (16b) on both sides of the groove (16a). The pin (18) is fixed on the shaft (16) by the retaining ring (19). The middle part of the pin (18) passes through the inner hole (17a) of the pressure block (17), so that the pressure block (17) is limited in the groove (16a) of the shaft (16). At the same time, the inner hole (17a) of the pressure block (17) and the pin (18) are clearance fit, so that the pressure block (17) can rotate around the pin (18).

7. The apparatus according to claim 5, characterized in that, The spindle motor (11) rotates in the opposite direction to the chuck motor (23).

8. A method of using a catheter alignment device, characterized in that, Using the apparatus as described in any one of claims 1-6, comprising: Step 1: Adjust the mandrel assembly (4) so ​​that the mandrel plane (14a) is aligned directly below the pressure block (17); Step 2: Place the conduit to be processed onto the mandrel (14), place the weld seam of the conduit on the mandrel plane (14a), and clamp the conduit with a chuck (21); Step 3: Turn on the servo electric cylinder, and press down the pressure block (17) to hammer and correct the guide tube shape; Step 4: Turn on the chuck motor (23) so that the guide tube is rotated while being hammered to correct its shape.

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