A pull ring pull wire welding tool and a pull ring pull wire welding method

Abstract

This application discloses a tooling for welding pull ring wires and a method for welding pull ring wires. The tooling includes a base plate, two support units fixed to the base plate, a carrier unit supported by the two support units, and an end unit installed at the end of the carrier unit. The carrier unit includes a carrier rod with two wire positioning grooves for positioning the pull wire. The carrier rod is also fixed with a positioning ring that can abut against the pull ring. The positioning ring has two strip-shaped positioning grooves, which correspond one-to-one with the two wire positioning grooves, with each strip-shaped positioning groove facing one of the wire positioning grooves. After the pull ring wire welding is completed, the weld is stable, making the subsequent bending operation of the sheath more stable.

Description

Technical Field

[0001] This application relates to the field of interventional catheters, specifically to a tooling for welding pull ring wires and a method for welding pull ring wires. Background Technology

[0002] Interventional catheters are an indispensable medical tool in modern medicine. They utilize components such as sheaths, catheters, and balloons to penetrate blood vessels, enabling interventional treatments. The sheath's end can be bent to adapt to the vascular path, thus better facilitating patient treatment. Controlling the bending of the sheath's end relies primarily on a pull ring and two connecting wires within the sheath. This allows the sheath to bend in two directions with adjustable bending amplitude. Current technology typically involves welding the ends of the connecting wires to the pull ring. However, this method has two areas for improvement. First, the welding area between the connecting wires and the pull ring is generally small, potentially leading to insufficient stability between them and preventing the connecting wires from effectively pulling the pull ring, thus affecting the bending operation of the sheath. Second, while the two connecting wires are generally symmetrically positioned on either side of the pull ring, the small size of both the pull ring and the connecting wires makes welding unstable without suitable tooling, compromising weld quality. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the prior art, a tooling for welding pull rings and pull wires and a method for welding pull rings and pull wires are provided.

[0004] Technical solution: A tooling for welding pull ring wires includes a base plate, two support units fixed to the base plate, a carrier unit supported by the two support units, and an end unit installed at the end of the carrier unit; the carrier unit includes a carrier rod, the carrier rod having two wire positioning grooves for positioning the pull wire, the carrier rod also having a positioning ring fixed thereon that can abut against the pull ring, the positioning ring having two strip-shaped positioning grooves, the two strip-shaped positioning grooves and the two pull wire positioning grooves corresponding one to one, each strip-shaped positioning groove facing one of the pull wire positioning grooves.

[0005] Therefore, the wire positioning groove can effectively position the wire to be welded, making the welding operation more convenient.

[0006] Furthermore, the carrier unit includes two rotating rings through which the carrier rod passes, and a connecting block is connected between the rotating rings and the carrier rod. The rotating rings have annular grooves. The support unit includes two limiting roller units. The limiting roller unit includes a vertical plate fixedly connected to the substrate, a guide roller frame fixedly connected to the vertical plate, and two guide rollers installed at the guide roller frame.

[0007] This allows for better rotation of the carrier rod via the end unit, making it easier to rotate the carrier rod after welding one side of the wire, thus enabling welding of the other side of the wire.

[0008] Furthermore, locking units are installed at the two limiting roller units of the support unit near the end unit in the two support units. The locking unit includes a guide rod passing through the guide hole of the vertical plate, a locking rod fixedly connected to the guide rod, an end baffle fixedly connected to the guide rod, and a tension spring connecting the end baffle and the vertical plate. The annular groove of the rotating ring near the end unit in the two rotating rings has two positioning holes. The positioning holes are hemispherical, and the end of the locking rod is hemispherical.

[0009] The locking rod and positioning hole work together to lock the position of the carrier rod. However, due to the design of the pull ring and hemispherical structure, it can be locked on one hand, and can also be rotated 180 degrees by the rotation of the end unit before locking again.

[0010] Furthermore, the end of the strip positioning groove near the end unit has a semi-circular groove that communicates with the strip positioning groove.

[0011] This leaves enough space for laser welding.

[0012] Furthermore, the carrier rod is cylindrical, and the end of the carrier rod has a hexagonal insertion hole. The end unit includes a knob, a hexagonal insertion block fixedly connected to the knob, and two abutment plates fixedly connected to the knob and capable of abutting the pull ring.

[0013] This allows the abutment plate and the positioning ring to work together to better fix the position of the pull ring.

[0014] Furthermore, the insert is a magnetic block, and a magnet that can attract the magnetic block is fixed inside the insertion hole; the end of the abutment plate has an anti-slip pad that can abut against the pull ring.

[0015] This allows for easy disassembly and installation of the knob and carrier rod.

[0016] Preferably, the anti-slip mat is elastic.

[0017] Therefore, the anti-slip pad and the positioning ring work together to better secure the pull ring.

[0018] Based on the aforementioned welding fixture, this application also discloses a method for welding a pull ring with a pull wire. The welding method uses a welding device, a pull ring, and a pull wire. The welding device includes a pull ring welding fixture as described in any of the preceding claims and a laser welding unit located above the pull ring welding fixture. The pull ring includes a pull ring body and two rotating bars. The pull ring body has two strip-shaped grooves, and each rotating bar is installed in one of the strip-shaped grooves. One end of each rotating bar is hinged to the pull ring body. The welding method includes the following steps. 1) Disassemble the end unit, install the pull ring, align the two strip grooves of the pull ring with the two pull wire positioning grooves of the carrier rod, and then install the end unit so that the pull ring is clamped and limited by the positioning ring and the end unit; 2) Rotate the rotating bar to expose the strip-shaped groove; 3) Thread the pull wire so that it is located in the pull wire positioning groove, and one end of the pull wire passes between the strip groove and the rotating bar; 4) The pull wire and pull ring body are welded using a laser welding unit; 5) Rotate the rotating bar so that it is positioned within the strip-shaped groove; 6) The rotating bar and the pull ring body are welded using a laser welding unit; 7) Bend the end of the pull wire so that the bent part is located in the strip groove and closely adheres to the rotating bar; 8) The bent portion is welded and fixed to the pull ring body using a laser welding unit.

[0019] Furthermore, the pull wire has two strands; the welding method further includes the following steps: 9) Rotate the knob to make the carrier rod rotate 180 degrees; 10) Repeat steps 1)-8) above to weld another pull wire.

[0020] Furthermore, both sides of the strip groove of the pull ring body have positioning recesses, and both sides of the rotating bar have positioning protrusions that cooperate with the positioning recesses. Both the positioning recesses and the positioning protrusions are hemispherical.

[0021] Beneficial effects: The welding fixture of this application makes welding more convenient, thereby making the welding of pull wires and pull rings more stable and the operation more precise.

[0022] The welding method described in this application makes the welding between the pull ring and the pull wire more stable, thereby making the subsequent bending operation using the pull wire more stable. Attached Figure Description

[0023] Figure 1 This is a schematic diagram showing how the pull wire passes between the rotating bar and the grooved strip. Figure 2This is a schematic diagram showing how to rotate the rotating bar into the groove. Figure 3 A diagram illustrating how the pull wire is bent to cover the rotating bar; Figure 4 This is a schematic diagram of the tooling structure; Figure 5 A first-person perspective diagram showing the separation of tooling components; Figure 6 A second-view diagram illustrating the separation of tooling components. Detailed Implementation

[0024] Reference numerals: 1. Base plate; 2. Support unit; 2.1 Vertical plate; 2.1.1 Guide hole; 2.2 Guide roller frame; 2.3 Guide roller; 2.4 End baffle; 2.5 Guide rod; 2.6 Locking rod; 2.7 Tension spring; 2.8 Rotating ring; 2.9 Connecting block; 2.10 Circular groove; 2.11 Positioning hole; 3.1 Knob section; 3.2 Abutment plate; 3.3 Insert block; 4. Carrier rod; 4.1 Pull wire positioning groove; 4.2 Positioning ring; 4.3 Strip positioning groove; 4.4 Semi-circular groove; 4.5 Insertion hole; 5.1 Pull ring body; 5.2 Strip groove; 5.2.1 Positioning recess; 5.3 Rotating bar; 5.3.1 Positioning protrusion; 6. Pull wire; 6.1 The bent part of the pull wire.

[0025] Example 1

[0026] like Figure 4-6As shown, Embodiment 1 discloses a tooling for welding pull ring wires, including a base plate 1, two support units 2 fixed to the base plate 1, a carrier unit supported by the two support units 2, and an end unit installed at the end of the carrier unit; the carrier unit includes a carrier rod 4, the carrier rod 4 having two pull wire positioning grooves 4.1 for positioning the pull wire 6, the carrier rod 4 also having a positioning ring 4.2 fixed thereon that can abut against the pull ring, the positioning ring 4.2 having two strip-shaped positioning grooves 4.3, the two strip-shaped positioning grooves 4.3 and the two pull wire positioning grooves 4.1 corresponding one-to-one, each strip-shaped positioning groove 4.3 facing one of the pull wire positioning grooves 4.1. The carrier unit includes two rotating rings 2.8 through which the carrier rod 4 passes. A connecting block 2.9 connects the rotating rings 2.8 and the carrier rod 4. The rotating rings 2.8 have annular grooves 2.10. The support unit includes two limiting roller units. The limiting roller unit includes a vertical plate 2.1 fixedly connected to the base plate 1, a guide roller frame 2.2 fixedly connected to the vertical plate 2.1, and two guide rollers 2.3 installed at the guide roller frame 2.2. Locking units are installed at the two limiting roller units of the support unit near the end unit in both of the two support units. Each locking unit includes a guide rod 2.5 passing through a guide hole 2.1.1 in the vertical plate 2.1, a locking rod 2.6 fixedly connected to the guide rod 2.5, an end baffle 2.4 fixedly connected to the guide rod 2.5, and a tension spring 2.7 connecting the end baffle 2.4 and the vertical plate 2.1. The annular groove 2.10 of the rotating ring 2.8 near the end unit in one of the two rotating rings has two positioning holes 2.11. The positioning holes 2.11 are hemispherical, and the end of the locking rod 2.6 is also hemispherical. The strip-shaped positioning groove 4.3 has a semi-circular groove 4.4 communicating with it at one end near the end unit. The carrier rod 4 is cylindrical, and its end has a hexagonal insertion hole 4.5. The end unit includes a knob 3.1, a hexagonal insertion block 3.3 fixedly connected to the knob 3.1, and two abutment plates 3.2 fixedly connected to the knob 3.1 and capable of abutting the pull ring. The insertion block 3.3 is a magnetic block, and a magnet capable of attracting the magnetic block is fixed inside the insertion hole 4.5; the end of the abutment plate 3.2 has an anti-slip pad capable of abutting the pull ring.

[0027] As shown in the figure, the pull wire positioning groove can position the pull wire well, and the positioning ring and the abutment plate can cooperate to position the pull ring, increasing the stability of operation. After the positional relationship between the pull ring and the pull wire is stable, the welding of the pull ring and the pull wire can be achieved well.

[0028] Example 2

[0029] like Figure 1-3The present application also discloses a method for welding pull ring wires, characterized in that the welding method uses a welding device, a pull ring, and two pull wires; the welding device includes the tooling for welding pull ring wires as described in Embodiment 1 and a laser welding unit located above the tooling (the laser welding unit can be any laser welding unit in the prior art); the pull ring includes a pull ring body 5.1 and two rotating bars 5.3, the pull ring body 5.1 has two strip-shaped grooves 5.2, each rotating bar 5.3 is installed in one of the strip-shaped grooves 5.2, and one end of the rotating bar 5.3 is hinged to the pull ring body 5.1; the welding method includes the following steps; 1) Disassemble the end unit, install the pull ring, align the two strip grooves of the pull ring with the two pull wire positioning grooves of the carrier rod, and then install the end unit so that the pull ring is clamped and limited by the positioning ring and the end unit; 2) Rotate the rotating bar to expose the strip-shaped groove; 3) Thread the pull wire so that it is located in the pull wire positioning groove, and one end of the pull wire passes between the strip groove and the rotating bar; 4) The pull wire and pull ring body are welded using a laser welding unit; 5) Rotate the rotating bar so that it is positioned within the strip-shaped groove; 6) The rotating bar and the pull ring body are welded using a laser welding unit; 7) Bend the end of the pull wire so that the bent part is located in the strip groove and closely adheres to the rotating bar; 8) The bent portion is welded and fixed to the pull ring body using a laser welding unit.

[0030] 9) Rotate the knob to make the carrier rod rotate 180 degrees; 10) Repeat steps 1)-8) above to weld another pull wire.

[0031] With this welding method, after welding is completed, both parts of the pull wire are welded and fixed to the pull ring body, and the rotating bar is also welded and fixed to the pull ring body. This makes the welding between the pull wire and the pull ring body more stable, thus making the subsequent bending operation more stable.

[0032] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes and modifications can be made to the present invention without departing from the scope defined by the claims.

Claims

1. A tooling for welding pull ring wires, characterized in that, The system includes a base plate, two support units fixed to the base plate, a carrier unit supported by the two support units, and an end unit mounted at the end of the carrier unit. The carrier unit includes a carrier rod with two pull-wire positioning grooves for positioning the pull wire. The carrier rod also has a positioning ring fixed to it, capable of abutting against a pull ring. The positioning ring has two strip-shaped positioning grooves, each corresponding to one of the pull-wire positioning grooves, with each strip-shaped positioning groove facing one of the pull-wire positioning grooves. The carrier unit includes two rotating rings through which the carrier rod passes. A connecting block is connected between the rotating ring and the carrier rod, and the rotating ring has an annular groove; the support unit includes two limiting roller units, each limiting roller unit including a vertical plate fixedly connected to the base plate, a guide roller frame fixedly connected to the vertical plate, and two guide rollers installed at the guide roller frame; the carrier rod is cylindrical, and the end of the carrier rod has a hexagonal insertion hole, the end unit including a knob, a hexagonal insertion block fixedly connected to the knob, and two abutment plates fixedly connected to the knob and capable of abutting the pull ring.

2. The tooling for welding pull ring wires according to claim 1, characterized in that, Locking units are installed at the two limiting roller units of the support unit near the end unit in the two support units. The locking unit includes a guide rod passing through the guide hole of the vertical plate, a locking rod fixedly connected to the guide rod, an end baffle fixedly connected to the guide rod, and a tension spring connecting the end baffle and the vertical plate. The annular groove of the rotating ring near the end unit in the two rotating rings has two positioning holes. The positioning holes are hemispherical, and the end of the locking rod is hemispherical.

3. The tooling for welding pull ring wires according to claim 1, characterized in that, The end of the strip positioning groove near the end unit has a semi-circular groove that communicates with the strip positioning groove.

4. The tooling for welding pull ring wires according to claim 1, characterized in that, The insert is a magnetic block, and a magnet that can attract the magnetic block is fixed inside the insertion hole; the end of the abutment plate has an anti-slip pad that can abut against the pull ring.

5. A method for welding pull ring wires, characterized in that, The welding method uses a welding device, a pull ring, and a pull wire; the welding device includes a tooling for pull ring and pull wire welding as described in any one of claims 1-4 and a laser welding unit located above the tooling for pull ring and pull wire welding; the pull ring includes a pull ring body and two rotating bars, the pull ring body having two strip-shaped grooves, each rotating bar being installed in one of the strip-shaped grooves, and one end of the rotating bar being hinged to the pull ring body; the welding method includes the following steps; 1) Disassemble the end unit, install the pull ring, align the two strip grooves of the pull ring with the two pull wire positioning grooves of the carrier rod, and then install the end unit so that the pull ring is clamped and limited by the positioning ring and the end unit; 2) Rotate the rotating bar to expose the strip-shaped groove; 3) Thread the pull wire so that it is located in the pull wire positioning groove, and one end of the pull wire passes between the strip groove and the rotating bar; 4) The pull wire and pull ring body are welded using a laser welding unit; 5) Rotate the rotating bar so that it is positioned within the strip-shaped groove; 6) The rotating bar and the pull ring body are welded using a laser welding unit; 7) Bend the end of the pull wire so that the bent part is located in the strip groove and closely adheres to the rotating bar; 8) The bent portion is welded and fixed to the pull ring body using a laser welding unit.

6. The pull ring wire welding method according to claim 5, characterized in that, The pull wire has two parts; the welding method further includes the following steps: 9) Rotate the knob to make the carrier rod rotate 180 degrees; 10) Repeat steps 1)-8 above) to weld another pull wire.

7. The pull ring wire welding method according to claim 5, characterized in that, The pull ring body has positioning recesses on both sides of the strip groove, and the rotating bar has positioning protrusions on both sides that cooperate with the positioning recesses. Both the positioning recesses and the positioning protrusions are hemispherical.

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