Medical steel wire straightening and cutting device and medical torque wire forming method

Abstract

The application relates to the technical field of medical devices, in particular to a medical steel wire straightening and cutting device and a medical torque wire forming method. The medical steel wire straightening and cutting device comprises a first straightening mechanism and a second straightening mechanism. The first straightening mechanism is provided with at least two rows of first straightening pieces arranged at intervals along a first direction in a second direction, each first straightening piece can rotate around its own axis to pre-straighten the steel wire; the second straightening mechanism comprises a rotatable straightening support and a plurality of second straightening pieces connected to the straightening support, the second straightening piece comprises a straightening end head movable along a direction perpendicular to the rotation axis, at least part of the straightening end head is provided with a flexible protective piece, the flexible protective piece is used for contacting the steel wire to reduce the abrasion of the steel wire, the straightening end head has a tendency to extrude towards the steel wire along the direction perpendicular to the rotation axis, and is used for secondary straightening of the steel wire, so that adaptive adjustment can be made according to different specifications of the steel wire, manual adjustment is not needed, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical instrument manufacturing, in particular to a medical steel wire straightening and cutting device and a medical torque wire forming method. BACKGROUND

[0002] The field of view of an endoscope is mainly at the front end of the camera, and the interaction between the endoscope and the tissue outside the field of view is often invisible. In clinical practice of manually operating the endoscope, the doctor can judge the interaction between the tip and the tissue by perceiving the torque on the control knob at the handle and combining rich clinical experience. In order to improve the accuracy and safety of treatment, the torque performance and wear resistance of the torque wire are required to be high. At present, the raw material of the medical torque wire is steel wire, which is prone to deformation due to being too thin and too long, and the straightness of the steel wire affects the performance of the torque wire, so the steel wire needs to be straightened multiple times before use.

[0003] In related technologies, the steel wire straightening and cutting device is usually provided with a straightening mechanism, which is constructed with a straightening contact surface to extrude the steel wire to achieve straightening. However, when producing different specifications of steel wire, the position of the straightening contact surface needs to be manually adjusted each time to ensure sufficient contact pressure. The straightening structure has multiple straightening contact surfaces arranged at intervals, which needs to be adjusted multiple times, and the operation is complicated, affecting the production efficiency. Moreover, the manual adjustment has low precision, which easily causes poor straightening effect or over-straightening, causing serious wear of the steel wire. Since the precision requirement of the torque wire formed by the steel wire in the medical field is relatively high, the production quality required by the medical instrument is not easily met. SUMMARY

[0004] Therefore, it is necessary to provide a medical steel wire straightening and cutting device to reduce the wear of the straightening mechanism on the steel wire and ensure the straightening effect.

[0005] The medical steel wire straightening and cutting device comprises a conveying mechanism, a first straightening mechanism, a second straightening mechanism, a traction mechanism and a cutting mechanism; the conveying mechanism is used for conveying the steel wire; the first straightening mechanism and the second straightening mechanism are sequentially arranged at the output end of the conveying mechanism along a first direction; the traction mechanism is arranged at the output end of the second straightening mechanism along the first direction and is used for traction of the steel wire from the second straightening mechanism; the cutting mechanism is arranged at the output end of the traction mechanism along the first direction and is used for cutting of the steel wire from the traction mechanism; wherein the first straightening mechanism is provided with at least two rows of first straightening members which are arranged along the first direction and are spaced apart from each other along the first direction, the first straightening members of the adjacent two rows are used for penetrating the steel wire, and each first straightening member can rotate around its own axis to pre-straighten the steel wire; the first direction and the second direction are arranged at an angle; the second straightening mechanism comprises a rotatable straightening support and a plurality of second straightening members connected to the straightening support, the plurality of second straightening members are arranged on both sides of the rotation axis of the straightening support and are spaced apart from each other along the first direction; the second straightening member comprises a straightening end head which is movable along a direction perpendicular to the rotation axis, at least part of the straightening end head is provided with a flexible protective member, the flexible protective member acts on the steel wire, the straightening end head has a tendency to extrude towards the steel wire along the direction perpendicular to the rotation axis, and is used for secondary straightening of the steel wire.

[0006] It can be understood that the conveying mechanism can convey the steel wire to the first straightening mechanism and the second straightening mechanism, and the traction mechanism can continuously traction the steel wire to move, the first straightening mechanism can pre-straighten the steel wire, and the pre-straightened steel wire can be secondarily straightened by the second straightening mechanism to improve the straightening effect. In the second straightening mechanism, the straightening end head is movable along a direction perpendicular to the rotation axis and always has a tendency to extrude towards the steel wire, so that the straightening end head can straighten the steel wire while keeping pressing the steel wire, and can also make adaptive adjustment according to steel wires of different specifications without manual adjustment of the plurality of second straightening members, which is beneficial to save time and improve production efficiency. In addition, the flexible protective member provided on the straightening end head can reduce the abrasion of the steel wire while extruding the steel wire, so as to improve the production quality.

[0007] In an optional embodiment, the straightening end head is convexly formed as an arc-shaped curved surface, and the flexible protective member covers at least the vertex of the arc-shaped curved surface.

[0008] In an optional embodiment, the second straightening mechanism comprises a pressure adjusting member which is installed on the second straightening member and can be pressed on the straightening end head, and the pressure adjusting member is compressible along a direction perpendicular to the rotation axis.

[0009] The second straightening member is provided with a limiting part on the side away from the straightening head in the direction perpendicular to the rotation axis; the pressure adjusting member comprises a first elastic member connected and pressed between the straightening head and the limiting part;

[0010] And / or, the pressure adjusting member comprises a pressure cylinder filled with compressible fluid, and the straightening head is inserted into the pressure cylinder and presses the fluid.

[0011] In an optional embodiment, the first straightening mechanism comprises two first straightening support seats, a first connecting rod and a second elastic member;

[0012] The two first straightening support seats are arranged at intervals in the second direction, and each first straightening support seat is rotatably installed with the first straightening member; the first connecting rod is simultaneously arranged through the two first straightening support seats and can be locked; and the second elastic member is sleeved on the first connecting rod and is pressed between the two first straightening support seats in the second direction.

[0013] In an optional embodiment, the traction mechanism comprises a traction support seat, two spaced traction shafts and a traction transmission assembly, each traction shaft is rotatably connected to the traction support seat, and the two traction shafts are drivingly connected through the traction transmission assembly to synchronously and reversely rotate relative to the traction support seat; the traction gap for arranging the steel wire is provided between the two traction shafts;

[0014] The traction mechanism further comprises a floating block and a limiting block capable of abutting against each other, the floating block and the limiting block are both installed on the traction support seat, one of the traction shafts is arranged through the floating block, and the other traction shaft is arranged through the limiting block;

[0015] The traction mechanism further comprises a third elastic member; in the radial direction of the traction shaft, one end of the third elastic member is connected to the traction support seat, and the other end is connected to the floating block, and the elastic force of the third elastic member can drive the floating block to be pressed towards the limiting block.

[0016] In an optional embodiment, the conveying mechanism comprises a spaced wire drum, a first wire winding disc and a metering wire winding member, the first wire winding disc is arranged between the wire drum and the metering wire winding member, the metering wire winding member is arranged at the input end of the first straightening mechanism, and the steel wire is tensioned between the wire drum, the first wire winding disc and the metering wire winding member and output to the first straightening mechanism.

[0017] In an optional embodiment, the cutting mechanism comprises a cutting movable assembly and a cutting support seat, the cutting support seat forms a material returning hole penetratingly arranged, at least part of the structure of the cutting movable assembly is arranged on one side of the material returning hole outputting the steel wire;

[0018] The cutting movable assembly comprises a cutting knife, an electromagnetic pusher and a fourth elastic member, one end of the cutting knife is connected with the electromagnetic pusher, the other end of the cutting knife is connected with the fourth elastic member, the cutting knife is rotationally connected with the cutting support seat between the electromagnetic pusher and the fourth elastic member, one end of the fourth elastic member away from the cutting knife is connected with the cutting support seat, the electromagnetic pusher is electrically connected with the metering wire winding member, and is configured to push the cutting knife to rotate around the rotation axis in response to the metering signal of the metering wire winding member.

[0019] In an optional embodiment, the cutting mechanism further comprises an adjusting assembly, the adjusting assembly comprises a first adjusting structure and a second adjusting structure, the first adjusting structure is connected between the cutting knife and the electromagnetic pusher, the cutting knife is rotationally connected with the cutting support seat through the second adjusting structure;

[0020] The first adjusting structure comprises a second connecting rod connected with the electromagnetic pusher, a first connecting arm and a second connecting arm; the second connecting rod extends along the axial direction of the material returning hole; the first connecting arm and the second connecting arm are connected and arranged at an angle, the first connecting arm is sleeved and connected with the second connecting rod and is at an angle with the second connecting rod, and the second connecting arm is connected with the cutting knife and is at an angle with the cutting knife;

[0021] The second adjusting structure comprises a rotation connecting piece, a fifth elastic member and an adjusting locking piece, the rotation connecting piece penetrates the cutting knife and the cutting support seat and is connected with the cutting knife; the fifth elastic member is arranged on the side of the cutting support seat away from the cutting knife and is sleeved on the rotation connecting piece, the adjusting locking piece is connected with the rotation connecting piece, and the fifth elastic member is limited between the adjusting locking piece and the cutting support seat.

[0022] In an optional embodiment, the steel wire straightening and cutting device further comprises a driving mechanism, the driving mechanism has a first power output end and a second power output end arranged at an angle, one of the first power output end and the second power output end is drivingly connected with the second straightening mechanism, and the other is drivingly connected with the traction mechanism.

[0023] The application further provides a medical torque wire forming method, comprising the following steps:

[0024] Step one: straightening and cutting the steel wire;

[0025] Step two: heat treatment of the cut steel wire;

[0026] Step three: cooling treatment of the heat-treated steel wire;

[0027] Step four: acid cleaning, alkaline cleaning and water cleaning of the cooled steel wire in sequence;

[0028] Step five: low-temperature baking treatment of the cleaned steel wire to form a torque wire;

[0029] Wherein, when performing step one, the above-mentioned medical steel wire straightening and cutting device is adopted, comprising the following steps:

[0030] Step A: the steel wire is input to the conveying mechanism;

[0031] Step B: the traction mechanism pulls the steel wire, the steel wire is conveyed from the conveying mechanism to the first straightening mechanism for pre-straightening, and then conveyed to the second straightening mechanism for secondary straightening, and the straightened steel wire is conveyed to the cutting mechanism;

[0032] Step C: the cutting mechanism cuts the steel wire.

[0033] The present application can realize secondary straightening of the steel wire to improve the straightening effect of the steel wire and improve the straightening efficiency of the steel wire by setting the first straightening structure and the second straightening mechanism. At the same time, by setting the straightening end of the second straightening mechanism to be movable while maintaining the pressure on the steel wire, the adaptability of the steel wire straightening can be adjusted without frequent manual adjustment, thereby improving the production efficiency. In addition, by setting the flexible protective member on the straightening end, the straightening end can have a protective effect on the steel wire while exerting a pressing action on the steel wire, reducing the wear of the steel wire, thereby improving the production quality of the steel wire to meet the high quality requirements of the torque wire formed by the steel wire in medical devices. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0035] Figure 1 The structure diagram of the medical steel wire straightening and cutting device provided by the present application;

[0036] Figure 2 The top view of the second straightening mechanism in the medical steel wire straightening and cutting device provided by the present application;

[0037] Figure 3 A structure diagram of a second straightening mechanism in the medical steel wire straightening and cutting device provided in the present application is shown in Figure 8;

[0038] Figure 4 A structure diagram of a first straightening mechanism in the medical steel wire straightening and cutting device provided in the present application is shown in Figure 7; Figure 3 A local enlarged view of A in Figure 7;

[0039] Figure 5 A structure diagram of a first straightening mechanism in the medical steel wire straightening and cutting device provided in the present application is shown in Figure 7;

[0040] Figure 6 A structure diagram of a traction mechanism in the medical steel wire straightening and cutting device provided in the present application is shown in Figure 6;

[0041] Figure 7 A front view of the traction mechanism in the medical steel wire straightening and cutting device provided in the present application is shown in Figure 5;

[0042] Figure 8 A perspective view of the driving mechanism in the medical steel wire straightening and cutting device provided in the present application is shown in Figure 4;

[0043] Figure 9 A structure diagram of a cutting mechanism in the medical steel wire straightening and cutting device provided in the present application is shown in Figure 3;

[0044] Figure 10 A front view of the cutting mechanism in the medical steel wire straightening and cutting device provided in the present application is shown in Figure 2.

[0045] 100, medical steel wire straightening and cutting device; 10, conveying mechanism; 11, wire drum; 12, first wire winding disc; 13, metering winding piece; 20, first straightening mechanism; 21, first straightening piece; 22, first straightening support seat; 23, first connecting rod; 24, second elastic piece; 30, second straightening mechanism; 31, second straightening support seat; 32, straightening support; 3201, guide hole; 3202, assembly opening; 33, second straightening piece; 331, straightening end; 332, limiting part; 34, flexible protection piece; 35, sleeve; 36, first elastic piece; 37, straightening locking piece; 40, traction mechanism; 41, traction support seat; 42, traction shaft; 43, traction transmission assembly; 431, traction transmission gear; 44, floating block; 45, limiting block; 46, third elastic piece; 50, driving mechanism; 501, first power output end; 502, second power output end; 51, first transmission assembly; 52, second transmission assembly; 53, reversing transmission assembly; 54, driving piece; 60, cutting mechanism; 61, cutting support seat; 611, material returning hole; 62, cutting movable assembly; 621, cutting knife; 622, electromagnetic pusher; 623, fourth elastic piece; 63, adjusting assembly; 631, first adjusting structure; 6311, second connecting rod; 6312, first connecting arm; 6313, second connecting arm; 632, second adjusting structure; 6321, rotating connecting piece; 6322, fifth elastic piece; 6323, adjusting locking piece; 70, mounting frame. DETAILED DESCRIPTION

[0046] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced in a variety of ways beyond the specific embodiments described herein without departing from the spirit of the present application, and it is intended that the present application cover all such variations as fall within the scope of the appended claims.

[0047] It should be noted that when an element is referred to as being "fixed to" or "set to" or "disposed to" another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used in the description of the specification are used for illustrative purposes only and are not intended to be the only implementation.

[0048] In addition, the terms "first", "second", etc. are used herein only to describe different instances, and are not used to denote or imply relative importance or a number of indications of the technical features indicated. Thus, the technical features defined with "first", "second", etc. can explicitly or implicitly include at least one of the technical features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly and specifically limited.

[0049] In the present application, unless otherwise explicitly specified and limited, the "on", "under", "above" and "over" of the first feature to the second feature can be that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the "on", "above" and "over" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0050] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as understood by a person skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more related listed items.

[0051] Please refer to Figures 1 to 10 The present application provides a medical steel wire straightening and cutting device 100 for straightening and cutting steel wires to form torque wires in subsequent processing. The medical steel wire straightening and cutting device 100 comprises a conveying mechanism 10, a first straightening mechanism 20, a second straightening mechanism 30, a traction mechanism 40 and a cutting mechanism 60. The first straightening mechanism 20 and the second straightening mechanism 30 are sequentially arranged at the output end of the conveying mechanism 10 along a first direction. The conveying mechanism 10 is used to convey the steel wire to the first straightening mechanism 20, and the first straightening mechanism 20 can pre-straighten the steel wire to reduce the part of the steel wire that is bent greatly. The second straightening mechanism 30 is used to straighten the steel wire for the second time to further straighten the part of the steel wire that is still bent after pre-straightening, improve the straightening effect of the steel wire and improve the production quality. The traction mechanism 40 is arranged at the output end of the second straightening mechanism 30 along the first direction, and is used to pull the steel wire from the second straightening mechanism 30 to facilitate the continuous conveying of the steel wire. The cutting mechanism 60 is arranged at the output end of the traction mechanism 40 along the first direction, and is used to cut the steel wire from the traction mechanism 40.

[0052] The first direction and the second direction are arranged at an angle and are arranged at an angle with the height direction of the medical steel wire straightening and cutting device 100. For the convenience of description, the first direction, the second direction and the height direction are arranged perpendicular to each other in pairs, and the first direction is taken as the x axis, the second direction is taken as the y axis, and the height direction is taken as the z axis.

[0053] As shown in Figure 1 In an optional embodiment, the conveying mechanism 10 includes a wire drum 11, a first wire winding disc 12 and a metering wire winding member 13 arranged at intervals. The first wire winding disc 12 is arranged between the wire drum 11 and the metering wire winding member 13, and the metering wire winding member 13 is arranged at the input end of the first straightening mechanism 20. The wire drum 11 is used to store steel wire. Under the action of the traction force of the traction mechanism 40, the steel wire is continuously conveyed from the wire drum 11 to the first straightening mechanism 20. The first wire winding disc 12 is used to tension the steel wire, so that the steel wire is conveyed to the metering wire winding member 13 in a tensioned state, which facilitates the metering wire winding member 13 to more accurately measure the length of the steel wire. The metering wire winding member 13 outputs the steel wire to the first straightening mechanism 20. For example, the metering wire winding member 13 includes a second wire winding disc and a metering encoder arranged on the second wire winding disc. The metering encoder measures the length of the steel wire passing through the second wire winding disc.

[0054] As shown in Figure 5 In an optional embodiment, the first straightening mechanism 20 is provided with at least two rows of first straightening members 21 arranged along the first direction along the second direction. The steel wire is arranged between the two rows of first straightening members 21. Each first straightening member 21 can rotate around its own axis. The outer surface of each first straightening member 21 can contact the steel wire to pre-straighten the steel wire, thereby reducing the structure of the steel wire bending greatly. In a specific embodiment, as the steel wire is continuously pulled by the traction mechanism 40, the steel wire moves while driving the first straightening member 21 to rotate, thereby eliminating the need for an additional power source and achieving high efficiency and energy saving.

[0055] As shown in Figure 5As shown in the optional embodiment, the first straightening mechanism 20 comprises two first straightening support bases 22, a first connecting rod 23 and a second elastic member 24. The two first straightening support bases 22 are arranged at intervals along the second direction, and each first straightening support base 22 is rotatably installed with the first straightening member 21 to support the rotation of the first straightening member 21. The first connecting rod 23 is simultaneously arranged through the two first straightening support bases 22, and the second elastic member 24 is sleeved on the first connecting rod 23 and is arranged between the two first straightening support bases 22 along the second direction, which is beneficial to adjusting the elastic deformation amount of the second elastic member 24 according to different specifications of the steel wire, and then changing the interval distance between the two first straightening support bases 22 to adjust the position of the first straightening member 21 along the second direction, so as to ensure the effect of the steel wire extrusion straightening. The first connecting rod 23 can be locked after the distance between the two first straightening support bases 22 is adjusted. The first connecting rod 23 also has a limiting and guiding effect on the elastic deformation of the second elastic member 24, which is beneficial to the deformation of the second elastic member 24 along the extension direction of the first connecting rod 23, and then improves the stability of the first straightening member 21 when moving along the second direction.

[0056] As shown in the optional embodiment, Figure 5 In a specific embodiment, one end of the first connecting rod 23 is arranged through one of the first straightening support bases 22 along the extension direction of the first connecting rod 23 and is threadedly connected, and the other end is arranged through the other first straightening support base 22 and is abutted against the limiting end face of the other first straightening support base 22. In this way, by rotating the first connecting rod 23, the length of the first connecting rod 23 inserted into one of the first straightening support bases 22 can be adjusted, and under the action of the elastic force of the second elastic member 24, the other first straightening support base 22 is always abutted against the limiting end face, so as to adjust the interval distance between the two first straightening support bases 22 and realize the adjustment of the position of the first straightening member 21 along the second direction.

[0057] As shown in the optional embodiment, Figures 1 to 4 In an optional embodiment, the second straightening mechanism 30 comprises a rotatable straightening support 32 and a plurality of second straightening members 33 connected to the straightening support 32. The plurality of second straightening members 33 are arranged on both sides of the rotation axis of the straightening support 32 and are arranged at intervals along the first direction. The steel wire is arranged through the two rows of second straightening members 33, and the steel wire sequentially passes through the plurality of second straightening members 33 in the moving process. The second straightening members 33 act on the steel wire to perform the second straightening in the process of rotating with the straightening support 32. Since the straightening support 32 can drive the second straightening members 33 to rotate, the plurality of second straightening members 33 can comprehensively straighten the steel wire in the circumferential direction, so as to make more fine straightening to the small-amplitude curved structure remaining in the pre-straightened steel wire and improve the straightening effect.

[0058] As shown in the optional embodiment, Figures 2 to 4In specific embodiments, the second straightening member 33 includes a straightening head 331 movable in a direction perpendicular to the rotation axis, and the second straightening member 33 acts on the steel wire through the straightening head 331 to straighten the steel wire, and the straightening head 331 has a tendency to press the steel wire in a direction perpendicular to the rotation axis. As shown in Figure 4 In specific embodiments, at least part of the straightening head 331 is provided with a flexible protective member 34, which is used to contact the steel wire to reduce the abrasion of the steel wire while the straightening head 331 has a pressing effect on the steel wire, and has a protective effect on the steel wire to ensure the precision of the steel wire and improve the production quality of the steel wire.

[0059] As shown in Figures 2 to 4 In specific embodiments, the straightening head 331 is convexly formed as an arc-shaped curved surface, and the flexible protective member 34 covers at least the vertex of the arc-shaped curved surface. In this way, the straightening head 331 forms a single-point action with the steel wire through the flexible protective member 34, and the area of the force is small, the pressing strength on the steel wire is greater, and the structure of the steel wire with a small amplitude of bending in the second straightening can have a better straightening effect, and the steel wire is protected from abrasion, and the abrasion resistance of the steel wire is reduced as much as possible due to excessive straightening pressure. Exemplarily, the flexible protective member 34 can be made of silicone, rubber or the like, and the flexible protective member 34 can be installed on the straightening head 331 by bonding, binding or the like.

[0060] In some embodiments, the straightening head 331 can also move in a direction perpendicular to the rotation axis according to different specifications of the steel wire to achieve adaptive adjustment, and always has a pressing force on the steel wire to ensure the straightening effect after adjustment. In this way, the position of the second straightening member 33 in the direction perpendicular to the rotation axis does not need to be manually adjusted according to different specifications of the steel wire, which saves time and improves production efficiency.

[0061] In summary, through the arrangement of the first straightening member 21 and the second straightening member 33 to straighten the steel wire twice, and the straightening head 331 in the second straightening member 33 can be adaptively adjusted according to different steel wires, on the basis of ensuring the pressing force on the steel wire and the straightening effect, the labor and time cost is saved, and the steel wire is protected by the arrangement of the flexible protective member 34 to reduce the abrasion of the steel wire in the straightening process, thereby improving the production efficiency and quality of the steel wire to form a torque wire, enhancing the abrasion resistance of the torque wire formed by the steel wire, prolonging the service life of the torque wire to meet the quality requirements of the medical torque wire.

[0062] As shown in Figure 2As shown, in some other embodiments, the medical wire straightening and cutting device 100 further includes a sleeve 35, which is installed in the middle of the straightening bracket 32. The sleeve 35 extends along the direction perpendicular to the rotation axis, located between the second straightening members 33 on both sides. When the wire enters the second straightening mechanism 30, it can pass through the sleeve 35 under the traction of the traction mechanism 40. The straightening end 331 presses against the sleeve 35 and transmits force to the internal wire, thereby achieving straightening by compressing the wire while further enhancing the protection of the wire.

[0063] In an optional embodiment, the second straightening mechanism 30 includes a pressure adjusting member, which is mounted on the second straightening member 33 and can press against the straightening end 331. The pressure adjusting member applies pressure to the straightening end 331 towards the rotation axis, thereby causing the straightening end 331 to tend to compress the steel wire. Furthermore, the pressure adjusting member is compressible in a direction perpendicular to the rotation axis. The steel wire exerts a reaction force on the straightening end 331, which is transmitted to the pressure adjusting member through the straightening end 331, resulting in a corresponding compression amount. Thus, the straightening end 331 can move in a direction perpendicular to the rotation axis according to different specifications of steel wire, achieving adaptive adjustment of the straightening end 331.

[0064] like Figures 2 to 4 As shown, in a specific embodiment, the second straightening member 33 has a limiting portion 332 on the side opposite to the straightening end 331 in a direction perpendicular to the rotation axis. The pressure adjusting member includes a first elastic member 36, which is connected and pressed between the straightening end 331 and the limiting portion 332. The first elastic member 36 exerts an elastic force on the straightening end 331, thereby enabling the straightening end 331 to compress the steel wire. Simultaneously, when straightening steel wires of different specifications, the first elastic member 36 can also undergo corresponding elastic deformation to achieve adaptive adjustment of the straightening end 331.

[0065] In another specific embodiment, the pressure regulating component includes a pressure cylinder filled with a compressible fluid. A straightening end 331 is inserted into the pressure cylinder and compresses the fluid. The fluid is typically a gas to facilitate compression. The fluid can exert pressure on the straightening end 331, thereby causing the straightening end 331 to exert a squeezing action towards the steel wire. Simultaneously, when straightening steel wires of different specifications, the straightening end 331 can also correspondingly change the compression amount of the squeezing fluid, causing the straightening end 331 to generate a corresponding movement stroke, thus achieving adaptive adjustment of the straightening end 331.

[0066] Of course, the first elastic element 36 and the pressure cylinder can also be combined and used to enhance the straightening effect on the steel wire.

[0067] like Figures 2 to 4As shown in an optional embodiment, the second straightening mechanism 30 further comprises a second straightening support base 31, and the straightening support frame 32 is rotatably connected to the second straightening support base 31, and the second straightening support base 31 is configured to support the rotation of the straightening support frame 32. The straightening support frame 32 is provided with a guide hole 3201 penetrating in the first direction, and the guide hole 3201 is configured to pass through the steel wire. In this way, the steel wire continuously passes through the straightening support frame 32 from the guide hole 3201 under the traction of the traction mechanism 40.

[0068] As shown in an optional embodiment, the second straightening mechanism 30 further comprises a second straightening support base 31, and the straightening support frame 32 is rotatably connected to the second straightening support base 31, and the second straightening support base 31 is configured to support the rotation of the straightening support frame 32. The straightening support frame 32 is provided with a guide hole 3201 penetrating in the first direction, and the guide hole 3201 is configured to pass through the steel wire. In this way, the steel wire continuously passes through the straightening support frame 32 from the guide hole 3201 under the traction of the traction mechanism 40. Figures 2 to 4 As shown in a further embodiment, the plurality of second straightening members 33 located on both sides of the rotation axis in the direction perpendicular to the rotation axis are arranged in a staggered manner along the direction of the rotation axis. It can be understood that when the steel wire is bent, there is usually a case that, for example, the steel wire has a first segment and a second segment connected to the first segment, and the first segment is bent towards one of the second straightening members 33 on one side of the rotation axis in the direction perpendicular to the rotation axis, and the second segment is usually bent towards the second straightening member 33 on the other side of the rotation axis in the direction perpendicular to the rotation axis under the action of stress. Therefore, by arranging the plurality of second straightening members 33 in a staggered manner, the plurality of second straightening members 33 can simultaneously contact the structures bent in different directions at different positions of the steel wire and straighten them. For example, among the two adjacent second straightening members 33, one of the second straightening members 33 contacts the first segment to straighten the first segment, and the other second straightening member 33 contacts the second segment to straighten the second segment. The combined effect of the staggered arrangement of the plurality of second straightening members 33 and the rotation of the straightening support frame 32 can simultaneously straighten the structures bent in different directions.

[0069] As shown in an optional embodiment, the second straightening mechanism 30 further comprises a second straightening support base 31, and the straightening support frame 32 is rotatably connected to the second straightening support base 31, and the second straightening support base 31 is configured to support the rotation of the straightening support frame 32. The straightening support frame 32 is provided with a guide hole 3201 penetrating in the first direction, and the guide hole 3201 is configured to pass through the steel wire. In this way, the steel wire continuously passes through the straightening support frame 32 from the guide hole 3201 under the traction of the traction mechanism 40. Figure 3 As shown in a specific embodiment, the straightening support frame 32 is provided with an assembly opening 3202 penetrating in the direction perpendicular to the rotation axis, the assembly opening 3202 extends in the direction of the rotation axis, and the end of the second straightening member 33 away from the rotation axis passes through the assembly opening 3202. The second straightening mechanism 30 further comprises a straightening locking member 37, which is sleeved on the portion of the second straightening member 33 extending out of the assembly opening 3202 and is locked. For example, the straightening locking member 37 is provided as a nut, the nut is threadedly connected with the second straightening member 33, the nut is sleeved on the second straightening member 33 and is locked by being screwed until the nut abuts against the straightening support frame 32.

[0070] As shown in an optional embodiment, the second straightening mechanism 30 further comprises a second straightening support base 31, and the straightening support frame 32 is rotatably connected to the second straightening support base 31, and the second straightening support base 31 is configured to support the rotation of the straightening support frame 32. The straightening support frame 32 is provided with a guide hole 3201 penetrating in the first direction, and the guide hole 3201 is configured to pass through the steel wire. In this way, the steel wire continuously passes through the straightening support frame 32 from the guide hole 3201 under the traction of the traction mechanism 40. Figure 6 and Figure 7As shown in the optional embodiment, the traction mechanism 40 comprises a traction support base 41, two spaced traction shafts 42 and a traction transmission assembly 43, each traction shaft 42 is rotatably connected to the traction support base 41, and the traction support base 41 supports the rotation of the traction shaft 42. Further, the two traction shafts 42 are drivingly connected through the traction transmission assembly 43 to rotate synchronously and reversely relative to the traction support base 41. The two traction shafts 42 have a traction gap for the steel wire to pass through, so that the steel wire passes through the traction gap. The two traction shafts 42 can respectively contact the steel wire, and the rotation directions of the two traction shafts 42 are opposite, so as to synchronously form parallel traction forces on both sides of the steel wire to continuously move the steel wire.

[0071] As shown in the optional embodiment, the traction mechanism 40 comprises a traction support base 41, two spaced traction shafts 42 and a traction transmission assembly 43, each traction shaft 42 is rotatably connected to the traction support base 41, and the traction support base 41 supports the rotation of the traction shaft 42. Further, the two traction shafts 42 are drivingly connected through the traction transmission assembly 43 to rotate synchronously and reversely relative to the traction support base 41. The two traction shafts 42 have a traction gap for the steel wire to pass through, so that the steel wire passes through the traction gap. The two traction shafts 42 can respectively contact the steel wire, and the rotation directions of the two traction shafts 42 are opposite, so as to synchronously form parallel traction forces on both sides of the steel wire to continuously move the steel wire. Figure 7 As shown in the optional embodiment, the traction mechanism 40 comprises a traction support base 41, two spaced traction shafts 42 and a traction transmission assembly 43, each traction shaft 42 is rotatably connected to the traction support base 41, and the traction support base 41 supports the rotation of the traction shaft 42. Further, the two traction shafts 42 are drivingly connected through the traction transmission assembly 43 to rotate synchronously and reversely relative to the traction support base 41. The two traction shafts 42 have a traction gap for the steel wire to pass through, so that the steel wire passes through the traction gap. The two traction shafts 42 can respectively contact the steel wire, and the rotation directions of the two traction shafts 42 are opposite, so as to synchronously form parallel traction forces on both sides of the steel wire to continuously move the steel wire.

[0072] Figure 6 As shown in the optional embodiment, the traction mechanism 40 comprises a traction support base 41, two spaced traction shafts 42 and a traction transmission assembly 43, each traction shaft 42 is rotatably connected to the traction support base 41, and the traction support base 41 supports the rotation of the traction shaft 42. Further, the two traction shafts 42 are drivingly connected through the traction transmission assembly 43 to rotate synchronously and reversely relative to the traction support base 41. The two traction shafts 42 have a traction gap for the steel wire to pass through, so that the steel wire passes through the traction gap. The two traction shafts 42 can respectively contact the steel wire, and the rotation directions of the two traction shafts 42 are opposite, so as to synchronously form parallel traction forces on both sides of the steel wire to continuously move the steel wire. Figure 7 As shown in the optional embodiment, the traction mechanism 40 comprises a traction support base 41, two spaced traction shafts 42 and a traction transmission assembly 43, each traction shaft 42 is rotatably connected to the traction support base 41, and the traction support base 41 supports the rotation of the traction shaft 42. Further, the two traction shafts 42 are drivingly connected through the traction transmission assembly 43 to rotate synchronously and reversely relative to the traction support base 41. The two traction shafts 42 have a traction gap for the steel wire to pass through, so that the steel wire passes through the traction gap. The two traction shafts 42 can respectively contact the steel wire, and the rotation directions of the two traction shafts 42 are opposite, so as to synchronously form parallel traction forces on both sides of the steel wire to continuously move the steel wire.

[0073] Further, the traction mechanism 40 further comprises a third elastic member 46. Radially along the traction shaft 42, one end of the third elastic member 46 is connected to the traction support base 41, and the other end is connected to the floating block 44. The elastic force of the third elastic member 46 can drive the floating block 44 to press against the limiting block 45, thereby causing the two traction shafts 42 to press the steel wire, ensuring the traction effect on the steel wire. At the same time, according to the different thickness of the steel wire, the third elastic member 46 can correspondingly elastically deform to adjust the deformation amount of the third elastic member 46, so as to adapt to steel wires of different diameters while ensuring the traction on the steel wire, avoiding the steel wire from being stuck.

[0074] ​In an optional embodiment, the medical wire straightening and cutting device 100 further includes a drive mechanism 50, which has a first power output end 501 and a second power output end 502 arranged at an angle. One of the first power output end 501 and the second power output end 502 is driven to the second straightening mechanism 30, and the other is driven to the traction mechanism 40, so as to realize synchronous transmission of the second straightening mechanism 30 and the traction mechanism 40.

[0075] like Figure 8 As shown, in a specific embodiment, the drive mechanism 50 includes a drive member 54, a first transmission assembly 51, a second transmission assembly 52, and a reversing transmission assembly 53. The drive member 54 is a motor with an output shaft. The reversing transmission assembly 53 is connected to the output shaft and forms a first power output end 501 and a second power output end 502 set at an angle to achieve power output in different directions. The first transmission assembly 51 is connected between the first power output end 501 and the second straightening mechanism 30 to realize power transmission, and the second transmission assembly 52 is connected between the second power output end 502 and the traction mechanism 40 to realize power transmission. This arrangement allows for the synchronous rotation of the straightening bracket 32 ​​and the traction shaft 42 with different rotation directions while only requiring a single drive member 54, thus saving space occupied by the drive mechanism 50.

[0076] In a specific embodiment, the reversing transmission assembly 53 includes a driving gear, a driven gear, a worm gear, and a worm shaft. The output shaft is connected to the driving gear, and the driving gear meshes with the driven gear. The driven gear is mounted on the worm to drive the rotation of the worm. The worm meshes with the worm gear. The end of the worm that is away from the driven gear forms a first power output end 501, and the shaft of the worm gear forms a second power output end 502.

[0077] like Figure 1 As shown, in a specific embodiment, the first transmission component 51 and the second transmission component 52 can each adopt a belt drive, which is generally characterized by smooth operation. In other embodiments, other methods such as gear drive can also be used.

[0078] like Figure 9 and Figure 10 As shown, in a further embodiment, the cutting mechanism 60 includes a cutting movable component 62 and a cutting support 61. The cutting support 61 forms a discharge hole 611 that extends through the material in a first direction. At least a portion of the structure of the cutting movable component 62 is disposed on the side of the discharge hole 611 from which the steel wire is output. Thus, the steel wire can pass through the discharge hole 611, and the cutting movable component 62 cuts the steel wire output from the discharge hole 611.

[0079] like Figure 9 and Figure 10As shown, in specific embodiments, the cutting activity assembly 62 comprises a cutting knife 621, an electromagnetic pusher 622 and a fourth elastic member 623, one end of the cutting knife 621 is connected to the electromagnetic pusher 622, and the other end is connected to the fourth elastic member 623. Between the electromagnetic pusher 622 and the fourth elastic member 623, the cutting knife 621 is rotationally connected to the cutting support base 61, and the end of the fourth elastic member 623 away from the cutting knife 621 is connected to the cutting support base 61. The electromagnetic pusher 622 can push the cutting knife 621 to rotate, and the steel wire is cut by the rotation of the cutting knife 621, which is simple and convenient to operate. During the rotation of the cutting knife 621, the fourth elastic member 623 can be elastically deformed, and after the electromagnetic pusher 622 is powered off, the fourth elastic member 623 can drive the cutting knife 621 to reset.

[0080] In specific embodiments, the electromagnetic pusher 622 is electrically connected with the metering wire winding member 13 of the aforementioned conveying mechanism 10, and is configured to rotate the cutting knife 621 around the rotation axis in response to the metering signal of the metering wire winding member 13, so as to realize accurate cutting of the length of the steel wire. The medical steel wire straightening and cutting device 100 further comprises a controller, which can transmit the metering signal to the controller when the metering wire winding member 13 meters the required length of the steel wire. The controller processes the metering signal and issues a corresponding control instruction to drive the electromagnetic pusher 622 to actuate the cutting knife 621.

[0081] As shown in Figure 9 and Figure 10 In specific embodiments, the cutting mechanism 60 further comprises an adjusting assembly 63, which comprises a first adjusting structure 631 and a second adjusting structure 632. The first adjusting structure 631 is connected between the cutting knife 621 and the electromagnetic pusher 622 to adjust the distance between the cutting knife 621 and the electromagnetic pusher 622. The cutting knife 621 is rotationally connected to the cutting support base 61 through the second adjusting structure 632, and the second adjusting structure 632 can adapt to the adjustment of the first adjusting structure 631, so that the cutting knife 621 adjusts the same distance relative to the cutting support base 61 at the rotational connection with the cutting support base 61. The cutting position of the cutting knife 621 relative to the output steel wire of the material return hole 611 is adjusted by the cooperation of the first adjusting structure 631 and the second adjusting structure 632.

[0082] As shown in Figure 9 and Figure 10As shown in the specific embodiments, the first adjusting structure 631 comprises a second connecting rod 6311 connected to the electromagnetic pusher 622, a first connecting arm 6312 and a second connecting arm 6313; the second connecting rod 6311 extends along the axial direction of the material returning hole 611; the first connecting arm 6312 and the second connecting arm 6313 are connected and arranged at an angle, the first connecting arm 6312 is sleeved and connected to the second connecting rod 6311 and is arranged at an angle with the second connecting rod 6311, and the second connecting arm 6313 is connected to the cutter 621 and is arranged at an angle with the cutter 621. In this way, the cutter 621 and the electromagnetic pusher 622 are connected and power transmission is realized through the second connecting rod 6311, the first connecting arm 6312 and the second connecting arm 6313, and at the same time, the distance between the cutter 621 and the electromagnetic pusher 622 can be adjusted by adjusting the connecting position of the first connecting arm 6312 relative to the second connecting rod 6311.

[0083] In specific embodiments, the first connecting arm 6312 and the second connecting rod 6311 are threadedly connected, and the position of the first connecting arm 6312 along the extension direction of the second connecting rod 6311 is moved by rotating the second connecting rod 6311.

[0084] As shown in the specific embodiments, the first adjusting structure 631 comprises a second connecting rod 6311 connected to the electromagnetic pusher 622, a first connecting arm 6312 and a second connecting arm 6313; the second connecting rod 6311 extends along the axial direction of the material returning hole 611; the first connecting arm 6312 and the second connecting arm 6313 are connected and arranged at an angle, the first connecting arm 6312 is sleeved and connected to the second connecting rod 6311 and is arranged at an angle with the second connecting rod 6311, and the second connecting arm 6313 is connected to the cutter 621 and is arranged at an angle with the cutter 621. In this way, the cutter 621 and the electromagnetic pusher 622 are connected and power transmission is realized through the second connecting rod 6311, the first connecting arm 6312 and the second connecting arm 6313, and at the same time, the distance between the cutter 621 and the electromagnetic pusher 622 can be adjusted by adjusting the connecting position of the first connecting arm 6312 relative to the second connecting rod 6311. Figure 9 Figure 10 As shown in the specific embodiments, the second adjusting structure 632 comprises a rotating connecting piece 6321, a fifth elastic piece 6322 and an adjusting locking piece 6323, the rotating connecting piece 6321 is arranged through the cutter 621 and the cutting support seat 61 and is connected to the cutter 621; the fifth elastic piece 6322 is arranged on the side of the cutting support seat 61 away from the cutter 621 and is sleeved on the rotating connecting piece 6321, the adjusting locking piece 6323 is connected to the rotating connecting piece 6321, and the fifth elastic piece 6322 is limited between the adjusting locking piece 6323 and the cutting support seat 61. In this way, when the first adjusting structure 631 adjusts the distance between the cutter 621 and the electromagnetic pusher 622, the cutter 621 transmits the force generated at the first adjusting structure 631 to the second adjusting structure 632, and the second adjusting structure 632 can adjust the distance between the cutter 621 and the cutting support seat 61 through the elastic deformation of the fifth elastic piece 6322, thereby realizing the adjustment of the cutting position of the cutter 621 relative to the steel wire output from the material returning hole 611.

[0085] As shown in the specific embodiments, the first adjusting structure 631 comprises a second connecting rod 6311 connected to the electromagnetic pusher 622, a first connecting arm 6312 and a second connecting arm 6313; the second connecting rod 6311 extends along the axial direction of the material returning hole 611; the first connecting arm 6312 and the second connecting arm 6313 are connected and arranged at an angle, the first connecting arm 6312 is sleeved and connected to the second connecting rod 6311 and is arranged at an angle with the second connecting rod 6311, and the second connecting arm 6313 is connected to the cutter 621 and is arranged at an angle with the cutter 621. In this way, the cutter 621 and the electromagnetic pusher 622 are connected and power transmission is realized through the second connecting rod 6311, the first connecting arm 6312 and the second connecting arm 6313, and at the same time, the distance between the cutter 621 and the electromagnetic pusher 622 can be adjusted by adjusting the connecting position of the first connecting arm 6312 relative to the second connecting rod 6311. Figure 1 As shown in the specific embodiments, the first adjusting structure 631 comprises a second connecting rod 6311 connected to the electromagnetic pusher 622, a first connecting arm 6312 and a second connecting arm 6313; the second connecting rod 6311 extends along the axial direction of the material returning hole 611; the first connecting arm 6312 and the second connecting arm 6313 are connected and arranged at an angle, the first connecting arm 6312 is sleeved and connected to the second connecting rod 6311 and is arranged at an angle with the second connecting rod 6311, and the second connecting arm 6313 is connected to the cutter 621 and is arranged at an angle with the cutter 621. In this way, the cutter 621 and the electromagnetic pusher 622 are connected and power transmission is realized through the second connecting rod 6311, the first connecting arm 6312 and the second connecting arm 6313, and at the same time, the distance between the cutter 621 and the electromagnetic pusher 622 can be adjusted by adjusting the connecting position of the first connecting arm 6312 relative to the second connecting rod 6311.

[0086] Figure 1 ​​As shown, in specific embodiments, the medical steel wire straightening and cutting device 100 comprises a mounting frame 70, the conveying mechanism 10, the first straightening mechanism 20, the second straightening mechanism 30, the traction mechanism 40, the driving mechanism 50 and the cutting mechanism 60 are all integratedly installed on the mounting frame 70.

[0087] The method for forming torque wire by using the medical steel wire straightening and cutting device 100 in the above embodiments comprises the following steps:

[0088] Step one: straightening and cutting the steel wire to obtain the steel wire with desired length.

[0089] In specific embodiments, step one is applied to the medical steel wire straightening and cutting device 100 described above, and step one comprises:

[0090] Step A: the steel wire is input to the conveying mechanism 10. Specifically, the steel wire is wound on the wire drum 11, and the steel wire is tensioned on the first wire winding disc 12 and the second wire winding disc of the metering wire winding member 13.

[0091] Step B: the traction mechanism 40 pulls the steel wire, so that the steel wire from the conveying mechanism 10 can be conveyed to the first straightening mechanism 20 for pre-straightening, and then conveyed to the first straightening mechanism 20 for secondary straightening, and the straightened steel wire is conveyed to the cutting mechanism 60;

[0092] Step C: the cutting mechanism 60 cuts the steel wire.

[0093] It can be understood that initially, the steel wire output from the conveying mechanism 10 is manually threaded through the first straightening mechanism 20, the second straightening mechanism 30 and the traction mechanism 40, and the first straightening member 21 and the second straightening member 33 are adjusted to ensure that the first straightening member 21 and the second straightening member 33 can contact the steel wire, and then the first straightening mechanism 20, the second straightening mechanism 30 and the traction mechanism 40 are simultaneously operated to straighten the steel wire. The part of the steel wire that is not straightened initially can be cut off by the cutting mechanism 60, and then the straightened steel wire is continuously conveyed to the cutting mechanism 60.

[0094] Step two: heat treating the cut steel wire to change the internal structure of the steel wire and improve the tensile properties of the steel wire. Specifically, the steel wire is placed in a heat treatment furnace, the heat treatment furnace is heated to the required temperature for heat treatment, and the heat treatment furnace is vacuumized and then inert gas is introduced. The constant temperature of the heat treatment furnace is set, which is generally between 200°C and 250°C, for example, the constant temperature is 200°C, 225°C or 250°C; the constant temperature treatment time of the heat treatment furnace is set, for example, it is set to 4 hours.

[0095] Step three: the steel wire after heat treatment is cooled to make the steel wire shape and not easy to be oxidized. Specifically, after the heat treatment is finished, the heat treatment furnace is powered off, and the steel wire is naturally cooled to 65-80℃. For example, the steel wire is cooled to 65℃, 70℃ or 80℃. Then, the heat treatment furnace door is opened, and the steel wire is cooled to room temperature in the air.

[0096] Step four: the steel wire after cooling is sequentially subjected to acid cleaning, alkaline cleaning and water cleaning. The acid cleaning is used to remove the oxides and impurities on the surface of the steel wire, the alkaline cleaning is used to neutralize the acidic substances on the surface of the steel wire and make the steel wire have more durable super-slip effect. The water cleaning is used to remove the residual alkaline substances on the surface of the steel wire. Specifically, the cleaning of the steel wire can be completed in an ultrasonic cleaning tank.

[0097] Step five: the cleaned steel wire is subjected to low-temperature baking to form a torque wire. The low-temperature baking is used to evaporate the water on the surface of the steel wire while keeping the performance of the steel wire.

[0098] In summary, the tensile strength of the generated torque wire is improved through the steps of heat treatment, acid and alkali cleaning, etc. When applied to medical devices such as endoscopes, the torque wire is not easy to deform, can better transmit torque, reduce rotation lag, and help the operator to judge the interaction between the end of the device and the tissue, improve the treatment accuracy and safety.

[0099] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present disclosure.

[0100] The above-described embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A medical steel wire straightening and cutting apparatus characterized by comprising: The application relates to a steel wire straightening and cutting device. The device comprises a conveying mechanism for conveying steel wires, a first straightening mechanism and a second straightening mechanism arranged in sequence along the output end of the conveying mechanism in a first direction, a traction mechanism arranged at the output end of the second straightening mechanism in the first direction for traction of the steel wires from the second straightening mechanism, and a cutting mechanism arranged at the output end of the traction mechanism in the first direction for cutting of the steel wires from the traction mechanism. The first straightening mechanism is provided with at least two rows of first straightening members arranged in the first direction and spaced apart in the second direction, the first straightening members of adjacent rows are arranged for the steel wires to pass through, and each first straightening member can rotate around its own axis to pre-straighten the steel wires. The first direction and the second direction are arranged at an angle. The second straightening mechanism comprises a rotatable straightening support and a plurality of second straightening members connected to the straightening support, the second straightening members are arranged on both sides of the rotation axis of the straightening support and are spaced apart in the first direction. The second straightening member comprises a straightening end head movable in a direction perpendicular to the rotation axis, at least part of the straightening end head is provided with a flexible protective member, the flexible protective member acts on the steel wire, the straightening end head has a tendency to extrude towards the steel wire in a direction perpendicular to the rotation axis, and is used for secondary straightening of the steel wire. The cutting mechanism comprises a cutting movable assembly, a cutting support seat and an adjusting assembly, the cutting support seat forms a material returning hole arranged through, at least part of the structure of the cutting movable assembly is arranged on one side of the material returning hole outputting the steel wire; the cutting movable assembly comprises a cutting knife, the cutting knife is rotationally connected to the cutting support seat and can rotate around the rotation axis. The adjusting assembly comprises a first adjusting structure and a second adjusting structure. The first adjusting structure comprises a second connecting rod, a first connecting arm and a second connecting arm; the second connecting rod extends in the axial direction of the material returning hole; the first connecting arm and the second connecting arm are connected and arranged at an angle, the first connecting arm is sleeved and connected to the second connecting rod and is arranged at an angle with the second connecting rod, and the second connecting arm is connected to the cutting knife and is arranged at an angle with the cutting knife. The second adjusting structure comprises a rotation connecting piece, a fifth elastic member and an adjusting locking piece, the rotation connecting piece passes through the cutting knife and the cutting support seat and is connected with the cutting knife; the fifth elastic member is arranged on the side of the cutting support seat away from the cutting knife and is sleeved on the rotation connecting piece, the adjusting locking piece is connected to the rotation connecting piece, and the fifth elastic member is limited between the adjusting locking piece and the cutting support seat. The straightening end head is convexly formed into an arc-shaped curved surface, and the flexible protective member covers at least the vertex of the arc-shaped curved surface. The second straightening mechanism comprises a pressure adjusting member installed on the second straightening member and capable of being pressed on the straightening end head, and the pressure adjusting member is compressible in a direction perpendicular to the rotation axis. ​ ​ 2. The medical steel wire straightening and cutting apparatus according to claim 1, characterized by ​ 3. The medical wire straightening and cutting device of claim 2, wherein, ​ The second straightening member is provided with a limiting part away from one side of the straightening head in a direction perpendicular to the rotation axis; the pressure adjusting member comprises a first elastic member connected and pressed between the straightening head and the limiting part; And / or, the pressure adjusting member comprises a pressure cylinder filled with compressible fluid, and the straightening head is inserted into the pressure cylinder and presses the fluid.

4. The medical wire straightening and cutting device of claim 1, wherein, The first straightening mechanism comprises two first straightening support seats, a first connecting rod and a second elastic member; The two first straightening support seats are arranged at intervals in the second direction, and each first straightening support seat is rotatably installed with the first straightening member; the first connecting rod is simultaneously arranged through the two first straightening support seats and can be locked; the second elastic member is sleeved on the first connecting rod and is arranged in the second direction between the two first straightening support seats.

5. The medical wire straightening and cutting device of claim 1, wherein, The traction mechanism comprises a traction support seat, two spaced traction shafts and a traction transmission assembly, each traction shaft is rotatably connected to the traction support seat, and the two traction shafts are drivingly connected through the traction transmission assembly to rotate synchronously and reversely relative to the traction support seat; the traction gap for arranging the steel wire is arranged between the two traction shafts; The traction mechanism further comprises a floating block and a limiting block capable of abutting each other, the floating block and the limiting block are both installed on the traction support seat, one of the traction shafts is arranged through the floating block, and the other traction shaft is arranged through the limiting block; The traction mechanism further comprises a third elastic member; along the radial direction of the traction shaft, one end of the third elastic member is connected to the traction support seat, and the other end is connected to the floating block, and the elastic force of the third elastic member can drive the floating block to be arranged towards the limiting block.

6. The medical wire straightening and cutting device of any one of claims 1 to 5, wherein, The conveying mechanism comprises a wire drum, a first wire winding disc and a metering wire winding member arranged at intervals, the first wire winding disc is arranged between the wire drum and the metering wire winding member, the metering wire winding member is arranged at the input end of the first straightening mechanism, and the steel wire is arranged between the wire drum, the first wire winding disc and the metering wire winding member and is output to the first straightening mechanism.

7. The medical wire straightening and cutting device of claim 6, wherein, The cutting movable assembly further comprises an electromagnetic pusher and a fourth elastic member; One end of the cutter is connected to the electromagnetic pusher, the other end is connected to the fourth elastic member, the cutter is rotatably connected to the cutting support seat between the electromagnetic pusher and the fourth elastic member, and the end of the fourth elastic member away from the cutter is connected to the cutting support seat; The electromagnetic pusher is electrically connected with the metering wire winding member and is configured to drive the cutter to rotate around the rotation axis in response to the metering signal of the metering wire winding member; The first adjusting structure is connected between the cutter and the electromagnetic pusher, wherein the second connecting rod is connected with the electromagnetic pusher.

8. The medical wire straightening and cutting device of any one of claims 1 to 5, wherein, The steel wire straightening and cutting device further comprises a driving mechanism having first and second angularly arranged power output ends, one of which is drivingly connected to the second straightening mechanism and the other of which is drivingly connected to the pulling mechanism.

9. A method of forming a medical torque wire, comprising: The method comprises the following steps: Step 1: straightening and cutting the steel wire; Step 2: heat treating the cut steel wire; Step 3: cooling the heat treated steel wire; Step 4: sequentially performing acid cleaning, alkali cleaning and clean water cleaning on the cooled steel wire; Step 5: low temperature baking the cleaned steel wire to form a torque wire; In step 1, the medical steel wire straightening and cutting device of any one of claims 1 to 8 is used, which comprises the following steps: Step A: inputting the steel wire into the conveying mechanism; Step B: pulling the steel wire by the pulling mechanism, conveying the steel wire from the conveying mechanism to the first straightening mechanism for pre-straightening, and then to the second straightening mechanism for secondary straightening, and conveying the straightened steel wire to the cutting mechanism; Step C: cutting the steel wire by the cutting mechanism.

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