Nickel-titanium alloy wire variable-diameter head extrusion equipment

Abstract

The utility model provides nickel-titanium alloy wire reducing head extrusion equipment, which relates to the technical field of nickel-titanium alloy wires and comprises a base, a mounting plate is fixed on the upper surface of the base, and an extrusion component is arranged on the mounting plate. According to the nickel-titanium alloy wire reducing head extrusion equipment, a rotating motor is started to drive a first rotating shaft to rotate, the first rotating shaft can drive a first extrusion roller to rotate, meanwhile, rotation of the first rotating shaft can drive a driving chain wheel to rotate, and the driving chain wheel can drive a driven chain wheel to rotate through a chain; the driven chain wheel can drive the second extrusion roller to rotate through the second rotating shaft, the heads of the nickel-titanium alloy wires can be extruded in sequence through cooperation of a first extrusion groove in the first extrusion roller and a second extrusion groove in the second extrusion roller, transition from the large diameter to the small diameter is achieved, the diameter changing process is gentle, and the diameter changing efficiency is improved. And the problem of stress concentration possibly caused by a traditional processing mode is avoided.

Description

Technical Field

[0001] This utility model relates to an extrusion device, specifically a nickel-titanium alloy wire variable diameter head extrusion device, belonging to the field of nickel-titanium alloy wire technology. Background Technology

[0002] Nickel-titanium alloy is a shape memory alloy, a special alloy that can automatically restore its original shape after plastic deformation at a specific temperature. Its elongation rate is over 20%, its damping characteristics are 10 times higher than ordinary springs, and its corrosion resistance is better than the best medical stainless steel currently available. Therefore, it can meet the application needs of various engineering and medical fields and is an excellent functional material.

[0003] In different scenarios, nickel-titanium alloy wires may require local diameter changes to meet specific mechanical or functional requirements, such as surgical guidewires and vascular stents. The front end needs a smaller diameter to facilitate entry into tiny blood vessels, while the rear end needs a larger diameter to provide stable maneuverability. Traditional diameter changes are achieved through cutting, stamping, and other methods. However, using cutting, stamping, and other methods may lead to stress concentration in the nickel-titanium alloy wire, affecting the material's mechanical properties and service life.

[0004] Therefore, a nickel-titanium alloy wire variable diameter extrusion device is proposed here. Utility Model Content

[0005] This invention proposes a nickel-titanium alloy wire diameter-changing head extrusion device, which can extrude and change the diameter of the head of the nickel-titanium alloy wire, making the diameter-changing process smooth and avoiding the stress concentration problem that may be caused by traditional processing methods.

[0006] This utility model is achieved through the following technical solution: a nickel-titanium alloy wire variable diameter head extrusion device, including a base, an installation plate fixed on the upper surface of the base, and an extrusion assembly provided on the installation plate.

[0007] The extrusion assembly includes two first rotating shafts and two second rotating shafts rotatably connected to the inner side of the mounting plate, and a rotary motor fixed to the outer side of the mounting plate. One end of each of the first and second rotating shafts extends through the outer side of the mounting plate. The output shaft of the rotary motor extends through the mounting plate and is fixed to one end of the upper first rotating shaft. A drive sprocket and a driven sprocket are respectively fixed to one end of the first and second rotating shafts that extend through the mounting plate, and the drive sprocket and the driven sprocket are connected in a driving connection.

[0008] The outer surfaces of the first and second rotating shafts are respectively fixed with a first extrusion roller and a second extrusion roller. The middle portions of the first and second extrusion rollers are respectively provided with a first extrusion groove and a second extrusion groove, and the diameter of the second extrusion groove is larger than that of the first extrusion groove.

[0009] Furthermore, a fixing plate is slidably contacted on the upper surface of the base, and two straight plates are fixed on the upper surface of the fixing plate. A first electric push rod is fixed to the inner wall of the hole on the two straight plates, and an arc-shaped clamp is fixed to the output end of the two first electric push rods.

[0010] Furthermore, anti-slip pads are provided on the side of the two arc-shaped clamps that are close to each other, and the diameter of the arc-shaped clamps is larger than that of the second extrusion groove.

[0011] Furthermore, a fixing block is fixed to the upper surface of the fixing plate, and a second electric push rod is fixed to one side of the fixing block.

[0012] Furthermore, a mounting block is fixed to the upper surface of the base, and the outer surface of the second electric push rod is fixed to the inner wall of the hole on the mounting block.

[0013] Furthermore, a sliding groove is provided on the upper surface of the base, and a slider is fixed on the bottom surface of the fixing plate, with the outer surface of the slider slidably connected to the inner wall of the sliding groove.

[0014] This utility model provides a nickel-titanium alloy wire variable diameter head extrusion device, which has the following beneficial effects:

[0015] 1. This nickel-titanium alloy wire diameter-changing head extrusion equipment uses a rotating motor to drive a first rotating shaft, which in turn drives a first extrusion roller. Simultaneously, the rotation of the first rotating shaft drives a drive sprocket, which in turn drives a driven sprocket via a chain. The driven sprocket, in turn, drives a second extrusion roller via a second rotating shaft. Through the interaction of the first extrusion groove on the first extrusion roller and the second extrusion groove on the second extrusion roller, the head of the nickel-titanium alloy wire is sequentially extruded, achieving a smooth transition from a large diameter to a small diameter. This makes the diameter-changing process gradual and avoids stress concentration problems that may occur with traditional processing methods.

[0016] 2. The nickel-titanium alloy wire diameter changing head extrusion equipment places the nickel-titanium alloy wire between two arc-shaped clamping plates. By starting the first electric push rod, the two arc-shaped clamping plates are driven to clamp and fix the nickel-titanium alloy wire. Then, the second electric push rod is started to drive the fixing plate to move, thereby moving the head of the nickel-titanium alloy wire into the second extrusion groove on the second extrusion roller for extrusion diameter changing. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the mounting plate and extrusion assembly in this utility model;

[0019] Figure 3 This is a cross-sectional schematic diagram of the first extrusion roller and the second extrusion roller in this utility model;

[0020] Figure 4 For the present utility model Figure 1 Enlarged schematic diagram of the structure at point A in the middle.

[0021] Explanation of reference numerals in the attached figures

[0022] 1. Base; 101. Slide groove;

[0023] 2. Extrusion assembly; 201. Rotary motor; 202. First rotating shaft; 203. First extrusion roller; 204. First extrusion groove; 205. Second rotating shaft; 206. Second extrusion roller; 207. Second extrusion groove; 208. Drive sprocket; 209. Driven sprocket;

[0024] 3. Mounting plate;

[0025] 4. Fixed plate; 401, slider;

[0026] 5. Straight plate; 6. First electric push rod; 7. Curved clamp; 8. Second electric push rod; 9. Fixing block; 10. Mounting block. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this application.

[0028] Please see Figures 1-4 The present invention proposes the following implementation scheme: a nickel-titanium alloy wire variable diameter head extrusion device, including a base 1, an mounting plate 3 fixed on the upper surface of the base 1, and an extrusion assembly 2 provided on the mounting plate 3.

[0029] Please refer to this carefully. Figure 2 and Figure 3 The extrusion assembly 2 includes two first rotating shafts 202 and two second rotating shafts 205 rotatably connected to the inner side of the mounting plate 3, and a rotary motor 201 fixed to the outer side of the mounting plate 3. One end of each of the first rotating shafts 202 and the second rotating shaft 205 extends through to the outer side of the mounting plate 3. The output shaft end of the rotary motor 201 extends through the mounting plate 3 and is fixed to one end of the first rotating shaft 202 located above. One end of each of the first rotating shafts 202 and the second rotating shaft 205 extending through the mounting plate 3 is respectively fixed with a drive sprocket 208 and a driven sprocket 209, and the drive sprocket 208 and the driven sprocket 209 are connected in a transmission manner.

[0030] The outer surfaces of the first rotating shaft 202 and the second rotating shaft 205 are respectively fixed with a first extrusion roller 203 and a second extrusion roller 206. The middle parts of the first extrusion roller 203 and the second extrusion roller 206 are respectively provided with a first extrusion groove 204 and a second extrusion groove 207, and the diameter of the second extrusion groove 207 is larger than that of the first extrusion groove 204.

[0031] By starting the rotary motor 201, the first rotating shaft 202 is driven to rotate. The first rotating shaft 202 can drive the first extrusion roller 203 to rotate. At the same time, the rotation of the first rotating shaft 202 can drive the drive sprocket 208 to rotate. The drive sprocket 208 can drive the driven sprocket 209 to rotate via a chain. The driven sprocket 209 can drive the second extrusion roller 206 to rotate via the second rotating shaft 205. Through the cooperation of the first extrusion groove 204 on the first extrusion roller 203 and the second extrusion groove 207 on the second extrusion roller 206, the head of the nickel-titanium alloy wire can be extruded sequentially to achieve a transition from a large diameter to a small diameter. This makes the diameter change process smooth and avoids the stress concentration problem that may be caused by traditional processing methods.

[0032] Please refer to this carefully. Figure 1 and Figure 4 The upper surface of the base 1 has a fixed plate 4 in sliding contact. Two straight plates 5 are fixed on the upper surface of the fixed plate 4. The inner walls of the holes on the two straight plates 5 are fixed with first electric push rods 6. The output ends of the two first electric push rods 6 are fixed with arc-shaped clamps 7.

[0033] Anti-slip pads are provided on the side of the two arc-shaped clamps 7 that are close to each other, and the diameter of the arc-shaped clamps 7 is larger than that of the second extrusion groove 207.

[0034] A fixing block 9 is fixed to the upper surface of the fixing plate 4, and a second electric push rod 8 is fixed to one side of the fixing block 9.

[0035] The upper surface of the base 1 is fixed with a mounting block 10, and the outer surface of the second electric push rod 8 is fixed to the inner wall of the hole on the mounting block 10.

[0036] The nickel-titanium alloy wire is placed between two arc-shaped clamping plates 7. The first electric push rod 6 is activated to drive the two arc-shaped clamping plates 7 to clamp and fix the nickel-titanium alloy wire. Then, the second electric push rod 8 is activated to drive the fixing plate 4 to move, thereby moving the head of the nickel-titanium alloy wire into the second extrusion groove 207 on the second extrusion roller 206 for extrusion and diameter change.

[0037] The upper surface of the base 1 is provided with a sliding groove 101, and the bottom surface of the fixing plate 4 is fixed with a slider 401, and the outer surface of the slider 401 is slidably connected to the inner wall of the sliding groove 101.

[0038] In use, this invention involves placing a nickel-titanium alloy wire between two arc-shaped clamping plates 7. Activating the first electric push rod 6 causes the two arc-shaped clamping plates 7 to clamp and fix the nickel-titanium alloy wire. Then, activating the rotary motor 201 drives the first rotating shaft 202 to rotate. The first rotating shaft 202 drives the first pressing roller 203 to rotate, and simultaneously, the rotation of the first rotating shaft 202 drives the driving sprocket 208 to rotate. The driving sprocket 208 drives the driven sprocket 209 to rotate via a chain, and the driven sprocket 209 drives the driven sprocket 209 to rotate via a second rotating... Shaft 205 drives the second extrusion roller 206 to rotate, and then the second electric push rod 8 is activated to drive the fixed plate 4 to move. The fixed plate 4 can move the head of the nickel-titanium alloy wire into the second extrusion groove 207 on the second extrusion roller 206. Through the cooperation of the first extrusion groove 204 on the first extrusion roller 203 and the second extrusion groove 207 on the second extrusion roller 206, the head of the nickel-titanium alloy wire can be extruded in sequence to realize the transition from a large diameter to a small diameter, making the diameter change process smooth and avoiding the stress concentration problem that may be caused by traditional processing methods.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A nickel-titanium alloy wire sizing head extrusion apparatus comprising a base (1) characterised in that: The upper surface of the base (1) is fixed with a mounting plate (3), and the mounting plate (3) is provided with an extrusion assembly (2); The extrusion assembly (2) comprises two first rotating shafts (202) and two second rotating shafts (205) which are rotatably connected to the inner side of the mounting plate (3), and a rotary motor (201) which is fixed to the outer side of the mounting plate (3), and one end of each of the first rotating shaft (202) and the second rotating shaft (205) penetrates to the outer side of the mounting plate (3), the output shaft end of the rotary motor (201) penetrates the mounting plate (3) and is fixed to one end of the upper first rotating shaft (202), one end of the first rotating shaft (202) and the second rotating shaft (205) which penetrates the mounting plate (3) is respectively fixed with a driving sprocket (208) and a driven sprocket (209), and the driving sprocket (208) and the driven sprocket (209) are in transmission connection; The outer surfaces of the first rotating shaft (202) and the second rotating shaft (205) are respectively fixed with a first extrusion roller (203) and a second extrusion roller (206), and the middle parts of the first extrusion roller (203) and the second extrusion roller (206) are respectively provided with a first extrusion groove (204) and a second extrusion groove (207), and the diameter of the second extrusion groove (207) is greater than that of the first extrusion groove (204).

2. The nickel-titanium alloy wire reducing head extrusion apparatus of claim 1, wherein: The upper surface of the base (1) is in sliding contact with a fixed plate (4), the upper surface of the fixed plate (4) is fixed with two straight plates (5), the inner walls of the holes in the two straight plates (5) are respectively fixed with first electric push rods (6), and the output ends of the two first electric push rods (6) are respectively fixed with arc-shaped clamping plates (7).

3. The nickel-titanium alloy wire reducing head extrusion apparatus of claim 2, wherein: The side of the two arc-shaped clamping plates (7) close to each other is provided with a non-slip pad, and the diameter of the arc-shaped clamping plate (7) is greater than that of the second extrusion groove (207).

4. The nickel-titanium alloy wire reducing head extrusion apparatus of claim 2, wherein: The upper surface of the fixed plate (4) is fixed with a fixed block (9), and one side of the fixed block (9) is fixed with a second electric push rod (8).

5. The nickel-titanium alloy wire reducing head extrusion apparatus of claim 4, wherein: The upper surface of the base (1) is fixed with a mounting block (10), and the outer surface of the second electric push rod (8) is fixed with the inner wall of the hole in the mounting block (10).

6. The nickel-titanium alloy wire reducing head extrusion apparatus of claim 2, wherein: The upper surface of the base (1) is provided with a sliding groove (101), the bottom surface of the fixed plate (4) is fixed with a sliding block (401), and the outer surface of the sliding block (401) is in sliding connection with the inner wall of the sliding groove (101).

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