Artificial heart valve stent forming method, planar forming machine and mold

Abstract

The present invention belongs to the technical field of artificial heart valves, and particularly relates to a method for forming a frame of an artificial heart valve, a planar forming machine and a mold. The method for forming a frame of an artificial heart valve, the planar forming machine and the mold of the present invention are provided with a plurality of convex push blocks and arc-shaped push blocks that can move independently, and according to the forming curve of the wire, the mold closing directions of the respective push blocks are designed, which can avoid and overcome the technical problem in the prior art that during the planar forming process, when the upper and lower molds provide a relatively large vertical force, the sliding property of the wire in the horizontal direction is not good, resulting in incomplete mold closing and failure to achieve the expected shaping effect; moreover, due to the unique design of the mold closing direction, the external force applied by the push block on the wire is small, scratches on the wire are not likely to occur, and the appearance of the finished product will not be affected; the planar forming machine for the frame of the artificial heart valve can realize continuous automated production of planar forming, so as to improve production efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of artificial heart valves, and particularly relates to a method for forming a frame of an artificial heart valve, a planar forming machine and a mold. Background Art

[0002] An artificial heart valve is a cardiac implantable medical device for treating heart valve diseases or defects. The artificial heart was first clinically applied in 1960, and has since gone through stages such as mechanical valves, biological tissue valves, and interventional valves, and has become a very important medical device in the field of cardiovascular treatment.

[0003] An artificial heart valve is composed of three parts: leaflets, a frame, and a suture ring. Papers such as "Yuan Quan. Research on Optimization of Leaflet Performance and Frame Forming Processing Method of Biological Valves [D]. Shandong University, 2008." and "Liu Chang'an. Digital Design and Manufacturing of Biological Valve Stents [D]. Shandong University, 2009." introduced the design and manufacturing of artificial heart valves. Considering that the frame curve is a space curve and the rigidity of the frame alloy material is relatively large, after deformation, the resilience will be very large. If only one-time space forming is used, on the one hand, the material requirements for the mold are relatively high, and on the other hand, it is not easy to form. Therefore, a two-step forming method is adopted: the first step is planar forming, that is, the forming of the planar unfolded shape of the frame curve; the second step is space forming, that is, the space forming of the frame curve, and a die-casting method is used to shape the product.

[0004] However, in the actual application process of the above existing solutions, due to the relatively large bending stress of the nitinol wire raw material, during the planar forming process, when the upper and lower dies provide a relatively large vertical force, the sliding property of the wire in the horizontal direction is not good, resulting in incomplete die closing and failure to achieve the expected shaping effect. Moreover, due to the large external force exerted by the mold on the wire, scratches on the wire are likely to occur, which will have a great impact on the appearance of the finished product. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for forming a frame of an artificial heart valve, a planar forming machine and a mold.

[0006] To solve the above technical problems, the present invention provides a flat forming die for an artificial heart valve framework, comprising: a mounting seat, and a convex push block group and an arc push block group which are movably mounted on the mounting seat and used for clamping wire materials; the convex push block group includes a first convex push block, a second convex push block, a third convex push block, and a fourth convex push block which are independently arranged in sequence from left to right, and the middle of each convex push block is a convex part facing the arc push block group, and both sides are concave arcs; the arc push block group includes a first arc push block, a second arc push block, a third arc push block, a fourth arc push block, and a fifth arc push block which are independently arranged in sequence from left to right; the concave part formed between adjacent convex push blocks is used to accommodate the arc part of the arc push block, and the concave part formed between adjacent arc push blocks is used to accommodate the convex part of the convex push block; wherein the first convex push block and the fourth convex push block are adapted to move left and right on the mounting seat; and the second convex push block, the third convex push block, the first arc push block, the second arc push block, the third arc push block, the fourth arc push block, and the fifth arc push block are adapted to move up and down on the mounting seat.

[0007] In another aspect, the present invention provides a flat forming machine for an artificial heart valve framework, comprising: the flat forming die for an artificial heart valve framework as described above; a first pushing mechanism located at the rear side of the mounting seat, which is used to push the second convex push block and the third convex push block forward respectively; a second pushing mechanism located at the front side of the mounting seat, which is used to push the first arc push block, the second arc push block, the third arc push block, the fourth arc push block, and the fifth arc push block backward respectively; a third pushing mechanism located on the left side of the mounting seat respectively, which is used to push the first convex push block to the right; a fourth pushing mechanism located on the right side of the mounting seat respectively, which is used to push the fourth convex push block to the left; and a fixing part grasping mechanism, which is used to insert a fixing part into the corresponding fixing holes of a convex push block and a corresponding arc push block after they are abutted against each other.

[0008] In another aspect, the present invention provides a forming method for an artificial heart valve framework, comprising: performing flat forming on wire materials by using the flat forming die for an artificial heart valve framework as described above; putting the whole fixed flat forming die into a heat treatment furnace for flat shaping; performing space forming on the flat formed wire materials by using a space forming die; putting the fixed space forming die into a heat treatment furnace for space shaping; wherein the die closing sequence of the flat forming die is: the second arc push block, the first convex push block, the first arc push block, the second convex push block, the third arc push block, the third convex push block, the fourth arc push block, the fourth convex push block, the fifth arc push block.

[0009] The beneficial effects of the present invention are as follows: The method for forming the stent of the artificial heart valve, the planar forming machine and the mold of the present invention are provided with a number of convex push blocks and arc-shaped push blocks that can move independently, and according to the forming curve of the wire, the mold closing directions of each push block are designed, which can avoid and overcome the technical problem in the prior art that during the planar forming process, when the upper and lower molds provide a relatively large vertical force, the sliding property of the wire in the horizontal direction is not good, resulting in incomplete mold closing and failure to achieve the expected shaping effect; moreover, due to the unique design of the mold closing direction, the external force applied by the push block on the wire is small, scratches on the wire are not likely to occur, and the appearance of the finished product will not be affected; the planar forming machine for the stent of the artificial heart valve can automatically close the mold through the sequential movement of each mechanism, and after mold closing, the planar forming mold can be fixed by grasping the fixing part through the fixing part grasping mechanism, realizing continuous automated production of planar forming to improve production efficiency.

[0010] Other features and advantages of the present invention will be described in the following description, and in part, will be obvious from the description, or will be understood by implementing the present invention. The objectives and other advantages of the present invention are achieved and obtained by the structures specifically pointed out in the description and the drawings.

[0011] To make the above objectives, features and advantages of the present invention more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, is described in detail as follows. Description of the Drawings

[0012] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0013] Figure 1 It is a three-dimensional view of the stent of the embodiment of the present invention;

[0014] Figure 2 It is a planar forming mold in the prior art;

[0015] Figure 3 It is a three-dimensional forming mold in the prior art;

[0016] Figure 4 It is a top view of the initial state of the planar forming mold of the embodiment of the present invention;

[0017] Figure 5 It is a top view of the mold closing state of the planar forming mold of the embodiment of the present invention;

[0018] Figure 6It is a three-dimensional view during the mold closing process of the planar forming mold according to an embodiment of the present invention;

[0019] Figure 7 It is a mold closing flow chart of the planar forming mold according to an embodiment of the present invention;

[0020] Figure 8 It is a mold closing schematic diagram in a scenario of the prior art;

[0021] Figure 9 It is a three-dimensional view of the fixing member according to an embodiment of the present invention;

[0022] Figure 10 It is a three-dimensional view of the planar forming machine according to an embodiment of the present invention;

[0023] Figure 11 It is a three-dimensional view of the spatial forming mold according to an embodiment of the present invention;

[0024] Figure 12 It is an assembly schematic diagram of the spatial forming mold according to an embodiment of the present invention.

[0025] In the figure:

[0026] Planar forming mold 100, mounting seat 1, convex push block group 11, arc push block group 12, first convex push block 111, second convex push block 112, third convex push block 113, fourth convex push block 114, first arc push block 121, second arc push block 122, third arc push block 123, fourth arc push block 124, fifth arc push block 125, working part 1111, moving part 1112, sliding groove 13, fixing hole 14, fixing member 15, grasping part 151, inserting part 152;

[0027] First pushing mechanism 101, second pushing mechanism 102, third pushing mechanism 103, fourth pushing mechanism 104, fixing member grasping mechanism 105, fixing member storage seat 106;

[0028] Spatial forming mold 200, middle mold 210, petal frame groove 211, positioning groove 212, clamping assembly 220, upper clamping block 221, lower clamping block 222, fastening hole 223, horizontal part 224, vertical part 225. Detailed implementation manners

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] Figure 1 There is shown an existing valve frame, which is a space curve formed by a wire, having three upwardly convex portions and three downwardly concave arc portions.

[0031] Please refer to Figure 4 、 Figure 5 、 Figure 6 In order to facilitate the planar forming of the valve frame, an embodiment of the first aspect of the present invention provides a planar forming die for an artificial heart valve frame, including: a mounting base 1, and a convex push block group 11 and an arc push block group 12 movably mounted on the mounting base 1 for clamping the wire; the convex push block group 11 includes a first convex push block 111, a second convex push block 112, a third convex push block 113, and a fourth convex push block 114 independently arranged in sequence from left to right, and the middle of each convex push block is a convex portion facing the arc push block group 12, and both sides are concave arcs; the arc push block group 12 includes a first arc push block 121, a second arc push block 122, a third arc push block 123, a fourth arc push block 124, and a fifth arc push block 125 independently arranged in sequence from left to right; the concave portions formed between adjacent convex push blocks are used to accommodate the arc portions of the arc push blocks, and the concave portions formed between adjacent arc push blocks are used to accommodate the convex portions of the convex push blocks; wherein the first convex push block 111 and the fourth convex push block 114 are adapted to move left and right on the mounting base 1; and the second convex push block 112, the third convex push block 113, the first arc push block 121, the second arc push block 122, the third arc push block 123, the fourth arc push block 124, and the fifth arc push block 125 are adapted to move up and down on the mounting base 1.

[0032] Refer to Figure 6 In this embodiment, after the planar forming die is closed, the convex portions of each convex push block cooperate with the sides of two adjacent arc push blocks to form the convex portions of the valve frame; the arc push blocks can cooperate with the concave portions of two adjacent convex push blocks to form the concave arc portions of the valve frame.

[0033] Refer to Figure 2 In the process of closing the planar die of the prior art, a stamping die is used. Multiple downwardly convex portions of the upper die and multiple upwardly convex portions of the lower die apply force to the wire at the same time. The pressure on the surface of the wire is relatively large, and the sliding property of the wire in the horizontal direction is not good. To make the die closing successful, the upper and lower dies need a greater vertical force, and the pressure on the surface of the wire is greater, which will result in a greater frictional force at the contact between the die and the wire, and the sliding property of the wire in the horizontal direction is even worse, resulting in incomplete die closing and easy scratching of the wire surface.

[0034] To solve the above problems, refer to Figure 4 、 Figure 5 、 Figure 6, in this embodiment, the mold is set as independent pushing blocks, which can apply force to the wire one by one, reducing the force required to bend the wire, improving the sliding property of the wire in the horizontal direction, and facilitating mold closing; it also reduces the friction at the contact between the mold and the wire, preventing scratching of the wire surface; moreover, the lateral movement length of the wire during each step of mold closing is also small.

[0035] See Figure 7 As shown, during the preferred mold closing process of this embodiment, the following preferred moving sequence of the pushing blocks can be adopted for mold closing:

[0036] Step ①, the second arc-shaped pushing block 122 moves upward;

[0037] Step ②, the first convex pushing block 111 moves to the right;

[0038] Step ③, the first arc-shaped pushing block 121 moves upward;

[0039] Step ④, the second convex pushing block 112 moves downward;

[0040] Step ⑤, the third arc-shaped pushing block 123 moves upward;

[0041] Step ⑥, the third convex pushing block 113 moves downward;

[0042] Step ⑦, the fourth arc-shaped pushing block 124 moves upward;

[0043] Step ⑧, the fourth convex pushing block 114 moves to the left;

[0044] Step ⑨, the fifth arc-shaped pushing block 125 moves upward.

[0045] Among them, preferably, during each bending of the planar curve fitting of the wire, an arc-shaped pushing block and a convex pushing block cooperate for bending, and there will be no situation where a convex moves towards the mold closing between two convexes as shown in Figure 8 , which can prevent excessive pressure on the wire and damage to the wire; in addition, in the second step and the eighth step, the first convex pushing block 111 and the fourth convex pushing block 114 both perform mold closing from the side, with less lateral pulling on the wire, not easily damaging the wire surface, and requiring less thrust; at the end of each step, the pushing blocks for mold closing can be fixed by fixing parts to prevent the wire from rebounding.

[0046] In this embodiment, the excess part of the wire after heat treatment and forming can be removed as needed for spatial forming; the wire raw material can be but is not limited to nickel-titanium wire.

[0047] See Figure 6, in this embodiment, optionally, the upper parts of the convex push block and the arc push block are the working parts 1111 for clamping the wire, and the lower parts are the moving parts 1112; a chute 13 corresponding to each moving part 1112 is arranged on the mounting seat 1; a groove for accommodating the wire can also be arranged on the side of the working part 1111 facing the wire, so as to position the wire during the forming process.

[0048] In this embodiment, on the mounting seat 1 with the chute 13, the push blocks with working parts 1111 of different sizes can be replaced as needed, which is convenient for assembly, and the mold can adapt to the forming of different types of valve frames.

[0049] Please refer to Figure 4 , Figure 5 , in this embodiment, optionally, the working parts 1111 of the second arc push block 122, the third arc push block 123, and the fourth arc push block 124 are semi-circular arc-like, and the working parts 1111 of the first arc push block 121 and the fifth arc push block 125 are quarter-circular arc-like.

[0050] In this embodiment, preferably, fixing holes 14 are arranged on both the convex push block and the arc push block, for the fixing member 15 to be inserted after the push blocks are pressed against each other, so as to fix each convex push block and the corresponding arc push block to each other.

[0051] Refer to Figure 9 , in this embodiment, optionally, the fixing member 15 may include a grasping part 151 located at the upper part and two inserting parts 152 located at the lower part.

[0052] Taking Figure 6 the state shown as an example, after the second arc push block 122, the first convex push block 111, and the first arc push block 121 are closed, the fixing member 15 can be inserted into the fixing holes 14 of the three push blocks. The two inserting parts 152 of the fixing member 15 are respectively inserted into the fixing holes 14 of the arc push block and the convex push block to fix the two; after all the push blocks are fixed, the entire mold can be transferred.

[0053] Refer to Figure 10, in order to achieve continuous production and improve the forming efficiency of the valve frame plane, the second aspect embodiment of the present invention provides an artificial heart valve frame plane forming machine, including: the artificial heart valve frame plane forming die 100 as described above; a first pushing mechanism 101 located at the rear of the mounting seat 1, for respectively pushing the second convex pushing block 112 and the third convex pushing block 113 forward; a second pushing mechanism 102 located at the front of the mounting seat 1, for respectively pushing the first arc pushing block 121, the second arc pushing block 122, the third arc pushing block 123, the fourth arc pushing block 124, and the fifth arc pushing block 125 backward; a third pushing mechanism 103 respectively located on the left side of the mounting seat 1, for pushing the first convex pushing block 111 to the right; a fourth pushing mechanism 104 respectively located on the right side of the mounting seat 1, for pushing the fourth convex pushing block 114 to the left; and a fixing part grasping mechanism 105, for inserting the fixing part 15 into the corresponding fixing holes 14 of the two after a convex pushing block and the corresponding arc pushing block are abutted against each other.

[0054] In this embodiment, optionally, the first pushing mechanism 101, the second pushing mechanism 102, the third pushing mechanism 103, and the fourth pushing mechanism 104 may all include a pushing cylinder and a mover for driving the pushing cylinder to move along the side length of the mounting seat 1. The mover may be a linear motor or a cylinder, and can be selected according to the moving length; the fixing part grasping mechanism 105 may be composed of a finger cylinder, a lifting cylinder, and a linear motor.

[0055] In this embodiment, optionally, a fixing part storage seat 106 is further provided on one side of the mounting seat 1 for placing the fixing part 15 to be clamped; the fixing part grasping mechanism 105 is adapted to clamp the fixing part 15 from the fixing part storage seat 106.

[0056] The third aspect embodiment of the present invention further provides an artificial heart valve frame forming method, including: performing plane forming on the wire material by using the artificial heart valve frame plane forming die 100 as described above. Of course, the wire material can also be subjected to plane forming by using the artificial heart valve frame plane forming machine as described above; putting the whole fixed plane forming die 100 into a heat treatment furnace for plane shaping; performing space forming on the wire material after plane forming by using a space forming die 200; putting the whole fixed space forming die 200 into a heat treatment furnace for space shaping; wherein preferably, the mold closing sequence of the plane forming die is: the second arc pushing block 122, the first convex pushing block 111, the first arc pushing block 121, the second convex pushing block 112, the third arc pushing block 123, the third convex pushing block 113, the fourth arc pushing block 124, the fourth convex pushing block 114, the fifth arc pushing block 125.

[0057] See Figure 11 and Figure 12, in this embodiment, optionally, the spatial forming die 200 includes: a middle die 210, on the outer peripheral wall of which there is a petal holder groove 211 for accommodating the wire, and the petal holder groove 211 has the same spatial shape as the finished petal holder; and a clamping assembly 220 for clamping the wire in the petal holder groove 211.

[0058] In this embodiment, the wire after parallel forming and removing the redundant part can be embedded into the petal holder groove 211, and then the wire is clamped in the petal holder groove 211 by the clamping assembly 220 to perform spatial forming on the wire.

[0059] See Figure 11 and Figure 12 , in this embodiment, optionally, the clamping assembly 220 includes three upper clamping blocks 221 and three lower clamping blocks 222; both the upper clamping blocks 221 and the lower clamping blocks 222 are L-shaped, and the horizontal part 224 abuts against the end face of the middle die 210, and the vertical part 225 presses the wire against the petal holder groove 211.

[0060] In this embodiment, optionally, fastening holes 223 are provided on the horizontal parts 224 of both the upper and lower clamping blocks; positioning grooves 212 are provided on the upper and lower end faces of the middle die 210 for accommodating the corresponding horizontal parts 224 of the upper and lower clamping blocks.

[0061] In this embodiment, optionally, the vertical part 225 of each upper clamping block 221 can be used to clamp the protruding part of the petal holder, and the vertical part 225 of the lower clamping block 222 can be used to clamp the downwardly concave arc part of the petal holder; the horizontal part 224 facilitates the fixation of the clamping block.

[0062] In this embodiment, the wire after parallel forming and removing the redundant part can be first embedded into the petal holder groove 211, then the wire is clamped in the petal holder groove 211 by the clamping assembly 220, then fixing members such as bolts are inserted into the fastening holes 223 to fix the corresponding clamping block to the middle die 210, and then the whole die is placed in a heat treatment furnace for shaping.

[0063] In this embodiment, the method for forming the artificial heart valve petal holder first fits the wire with a die, applies a small force to the wire, and then fixes the whole die and finally shapes the wire by heat treatment, effectively ensuring that the petal holder is formed without damaging the surface; the method for forming the artificial heart valve petal holder facilitates the flow and automated continuous production of the petal holder, the transfer of the planar and spatial forming dies is convenient, and the whole die can be directly placed in a heat treatment furnace, with high production efficiency.

[0064] In this embodiment, both the planar forming die 100 and the spatial forming die 200 are provided with independent components, which is convenient for processing, forming, maintenance and replacement. Compared with the stamping forming die in the prior art, the cost is low and it is easy to maintain.

[0065] In this embodiment, the heat treatment temperature can be 400 - 550 °C, and the time can be 5 - 20 min.

[0066] In summary, in the artificial heart valve frame forming method, planar forming machine and mold of the present invention, by providing a number of convex push blocks and arc push blocks that can move independently, and designing the mold closing direction of each push block according to the forming curve of the wire, it is possible to avoid and overcome the technical problem in the prior art that during planar forming, when the upper and lower molds provide a relatively large vertical force, the sliding property of the wire in the horizontal direction is not good, resulting in incomplete mold closing and unable to achieve the expected shaping effect; moreover, due to the unique design of the mold closing direction, the external force exerted by the push block on the wire is small, scratches on the wire are not likely to occur, and the appearance of the finished product will not be affected; the artificial heart valve frame planar forming machine can automatically close the mold through the sequential movement of each mechanism, and after mold closing, the planar forming mold can be fixed by grasping the fixing part with the fixing part grasping mechanism, realizing continuous automated production of planar forming to improve production efficiency.

[0067] Each device (components without specific structure description) selected in this application is a general standard component or a component known to those skilled in the art, and its structure and principle can be known to those skilled in the art through technical manuals or obtained through conventional experimental methods.

[0068] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0069] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0070] Inspired by the above ideal embodiments of the present invention, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An artificial heart valve stent plane forming die, characterized in that, Comprising: A mounting base (1), and a convex push block group (11) and an arc push block group (12) that are movably mounted on the mounting base (1) for clamping a wire; The convex push block group (11) includes a first convex push block (111), a second convex push block (112), a third convex push block (113), and a fourth convex push block (114) that are independently arranged in sequence from left to right. The middle part of each convex push block is a convex part facing the arc push block group (12), and both sides are concave arcs; The arc push block group (12) includes a first arc push block (121), a second arc push block (122), a third arc push block (123), a fourth arc push block (124), and a fifth arc push block (125) that are independently arranged in sequence from left to right; The concave part formed between adjacent convex push blocks is used to accommodate the arc part of the arc push block, and the concave part formed between adjacent arc push blocks is used to accommodate the convex part of the convex push block; wherein The first convex push block (111) and the fourth convex push block (114) are adapted to move left and right on the mounting base (1); and The second convex push block (112), the third convex push block (113), the first arc push block (121), the second arc push block (122), the third arc push block (123), the fourth arc push block (124), and the fifth arc push block (125) are adapted to move up and down on the mounting base (1).

2. The valve frame planar forming die according to claim 1, characterized in that The upper part of the convex push block and the arc push block is a working part (1111) for clamping the wire, and the lower part is a moving part (1112); Chute grooves (13) corresponding to each moving part (1112) are provided on the mounting base (1).

3. The valve frame planar forming die according to claim 2, characterized in that The working parts (1111) of the second arc push block (122), the third arc push block (123), and the fourth arc push block (124) are semi-circular arc-like, and the working parts (1111) of the first arc push block (121) and the fifth arc push block (125) are quarter-circular arc-like.

4. The valve frame planar forming die according to claim 1, characterized in that Fixing holes (14) are provided on both the convex push block and the arc push block, and are used for inserting a fixing member (15) after the push blocks are pressed against each other to fix each convex push block and the corresponding arc push block to each other.

5. An artificial heart valve frame plane forming machine, characterized in that, Comprising: An artificial heart valve frame planar forming die (100) according to any one of claims 1 to 4; A first pushing mechanism (101) located at the rear side of the mounting base (1) for respectively pushing the second convex push block (112) and the third convex push block (113) forward; A second pushing mechanism (102) located at the front side of the mounting base (1) for respectively pushing the first arc push block (121), the second arc push block (122), the third arc push block (123), the fourth arc push block (124), and the fifth arc push block (125) backward; A third pushing mechanism (103) respectively located on the left side of the mounting base (1) for pushing the first convex push block (111) to the right; A fourth pushing mechanism (104) located on the right side of the mounting seat (1) for pushing the fourth convex pushing block (114) to the left; and A fixing part gripping mechanism (105) for inserting the fixing part (15) into the corresponding fixing holes (14) of the convex pushing block and the corresponding arc pushing block after they are in contact with each other.

6. The valve frame planar forming machine according to claim 5, characterized in that A fixing part storage seat (106) is further provided on one side of the mounting seat (1) for placing the fixing parts (15) to be clamped; The fixing part gripping mechanism (105) is adapted to grip the fixing parts (15) from the fixing part storage seat (106).

7. A method for forming a stent of an artificial heart valve, characterized in that, Including: Performing planar forming on the wire using the artificial heart valve frame planar forming die (100) according to any one of claims 1 to 4; Putting the fixed planar forming die (100) as a whole into a heat treatment furnace for planar shaping; Performing spatial forming on the planar formed wire through a spatial forming die (200); Putting the fixed spatial forming die (200) into a heat treatment furnace for spatial shaping; Wherein The mold closing sequence of the planar forming die is: the second arc pushing block (122), the first convex pushing block (111), the first arc pushing block (121), the second convex pushing block (112), the third arc pushing block (123), the third convex pushing block (113), the fourth arc pushing block (124), the fourth convex pushing block (114), the fifth arc pushing block (125).

8. The valve frame planar forming machine according to claim 7, characterized in that The spatial forming die (200) includes: A middle die (210) whose outer peripheral wall is provided with a valve frame groove (211) for accommodating the wire, and the valve frame groove (211) has the same spatial shape as the finished valve frame; and A clamping assembly (220) for clamping the wire in the valve frame groove (211).

9. The valve frame planar forming machine according to claim 8, characterized in that The clamping assembly (220) includes three upper clamping blocks (221) and three lower clamping blocks (222); Both the upper clamping block (221) and the lower clamping block (222) are L-shaped, and the horizontal part (224) abuts against the end face of the middle die (210), and the vertical part (225) presses the wire against the valve frame groove (211).

10. The valve frame planar forming machine according to claim 9, characterized in that Fastening holes (223) are provided in the horizontal parts (224) of the upper and lower clamping blocks; Positioning grooves (212) are provided on the upper and lower end faces of the middle die (210) for accommodating the corresponding horizontal parts (224) of the upper and lower clamping blocks.

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