CN220482549U - Forming tool and forming equipment - Google Patents

Abstract

The utility model belongs to the technical field of composite structure forming, and discloses a forming tool and forming equipment, wherein the forming tool is used for manufacturing a formed C-shaped piece, the forming tool comprises a first die and a second die which are oppositely arranged, one of the first die and the second die can be connected with an upper die plate of a press, and the other of the first die and the second die can be connected with a lower die plate of the press; the first die comprises a base, a first movable block and two second movable blocks, wherein the first movable block is connected to the base in a sliding manner along the vertical direction and can be abutted to the base; one end of each second movable block is respectively and rotatably connected to two sides of the first movable block, the other end of each second movable block is movably connected to the base, and each second movable block comprises a limiting surface and a working surface; and a clamping interval with adjustable size is formed between the first movable block and the two second movable blocks, and the C-shaped piece is arranged in the clamping interval. The forming tool can pressurize all directions of the C-shaped piece, is not easy to rub, and improves the surface precision, bending precision and mechanical property of the manufactured C-shaped piece.

Description

Forming tool and forming equipment

Technical Field

The utility model relates to the technical field of composite structure forming, in particular to a forming tool and forming equipment.

Background

At present, thermoplastic composite materials have wide application in the industries of aviation, military, automobiles and the like by virtue of excellent performance, and for C-shaped structural members made of the thermoplastic composite materials, hot press molding is often adopted, prepregs are firstly adopted in the molding process, the prepregs are relatively hard after being molded, the shape following performance is poor when bending molding and other processes are carried out, and high molding temperature, for example, more than 300 ℃ is needed for successful molding, so that the requirement on high temperature resistance of autoclave equipment and molds is high.

In order to reduce the manufacturing cost and improve the manufacturing efficiency, the prior art uses compression molding equipment to mold the preformed plate of the thermoplastic composite material piece, and the mold and the process are simpler, occupy small space, have high efficiency and have low cost. The compression molding equipment comprises a press and a mold, wherein the press comprises an upper mold plate and a lower mold plate. One of the male die and the female die of the die is fixed on the upper die plate, and the other is fixed on the second die, and the die is correctly closed through positioning and guiding of the guide posts. However, in the molding process, the existing compression molding mold has the following technical problems: in the die assembly and demolding processes, the two side edges of the C-shaped structural member are easily scratched by the die to form a material rubbing phenomenon, meanwhile, the pressure of the two side edges of the C-shaped structural member cannot be effectively controlled and ensured, and the bending angle of the C-shaped structural member is easy to cause to not meet design requirements.

Therefore, there is a need to design a forming tool to solve the above technical problems.

Disclosure of Invention

The utility model aims to provide a forming tool which can pressurize all directions of a C-shaped piece, is not easy to generate a material rubbing phenomenon, and improves the surface precision, bending precision and mechanical property of the manufactured C-shaped piece.

To achieve the purpose, the utility model adopts the following technical scheme:

the forming tool is used for manufacturing a formed C-shaped piece and comprises a first die and a second die which are oppositely arranged, wherein one of the first die and the second die can be connected with an upper die plate of a press, and the other one of the first die and the second die can be connected with a lower die plate of the press; wherein, above-mentioned first mould includes:

the base can be connected with an upper die plate or a lower die plate of the press;

the first movable block is connected to the base in a sliding manner along the vertical direction and can be abutted against the base, and the first movable block can be abutted against the web plate of the C-shaped piece;

two second movable blocks, one end of each of which is rotatably connected to two sides of the first movable block, and the other end of each of which is movably connected to the base, wherein each of the second movable blocks comprises a limiting surface and a working surface, and the second movable blocks can rotate along with the movement of the first movable blocks so that the limiting surfaces are abutted to the base, and the working surfaces are abutted to the flanges of the C-shaped pieces; and a clamping interval with adjustable size is formed between the first movable block and the two second movable blocks, and the C-shaped piece is arranged in the clamping interval.

Optionally, one of the base and the first movable block is provided with a sliding groove, and the other is provided with a sliding block, and the sliding block is slidably connected in the sliding groove.

Optionally, the first movable block is elastically connected with the base.

Optionally, an arc-shaped part is formed at the joint of the first movable block and the second movable block.

Optionally, the second movable block includes a limiting portion and a working portion, where the limiting portion and the working portion are disposed at a first preset angle, a connection portion of the limiting portion and the working portion is rotatably connected to the first movable block, the other end of the limiting portion is movably connected to the base, a surface of the limiting portion, facing the base, is a limiting surface, and a surface of the working portion, facing the flange, is a working surface.

Optionally, the forming tool further includes a connecting belt, and two ends of the connecting belt are respectively connected to the other ends of the base and the limiting portion.

Optionally, a rotating shaft is arranged on the first movable block in a penetrating manner, a connecting protrusion is arranged at a joint of the limiting portion and the working portion, and the connecting protrusion is rotatably connected to the rotating shaft.

Optionally, the second mold includes a top surface and two side surfaces, where the top surface and the side surfaces are disposed at a second preset angle, the top surface can be abutted to the web, and the side surfaces can be abutted to the flange.

Optionally, the top surface and the side surface are both provided with thickness limiting members, and the thickness of the thickness limiting members is smaller than that of the C-shaped members.

Another object of the present utility model is to provide a molding apparatus, including a press and the molding tool according to any one of the above aspects, wherein the press includes an upper die plate and a lower die plate, the relative positions of the upper die plate and the lower die plate are adjustable, one of the first die and the second die is connected to the upper die plate, and the other is connected to the lower die plate. The forming equipment can pressurize all directions of the C-shaped piece, is not easy to generate a material rubbing phenomenon, and improves the surface precision, bending precision and mechanical property of the manufactured C-shaped piece.

The utility model has the beneficial effects that:

the utility model provides a forming tool and forming equipment, when a C-shaped piece is subjected to die pressing, a first die and a second die are opened through a press, a softened precast slab is placed at the middle position of the second die, the extending distance of two sides of the precast slab is ensured to meet the actual requirement, then the precast slab is pre-bent, the pre-bent precast slab and the second die are moved upwards together until a web plate of the precast slab contacts with a first movable block and then moves upwards continuously, the first movable block moves upwards at the moment, the second movable block rotates towards a flanging of the precast slab until a limit surface of the second movable block and the first movable block are abutted against a base, at the moment, the first movable block is abutted against the base and gives a certain pressure to the web plate, and a working surface of the second movable block is abutted against the flanging and gives a certain pressure to the flanging, so that a specific pressure can be applied to each position of the C-shaped piece, and further the die pressing forming of the C-shaped piece can be realized; and in the demolding process of the C-shaped piece, along with the separation of the first mold and the second mold, the first movable block and the second movable block move downwards, the second movable block rotates and is far away from the flanging, and then the first movable block is separated from the web plate, so that the demolding of the C-shaped piece can be completed. Meanwhile, in the process of forming and demolding of the C-shaped piece by the forming tool, the opening of the clamping section is larger, the clamping section cannot be scratched with a precast slab directly, and after the first movable block is abutted against the web plate, the second movable block is contacted with or separated from the flanging, so that the material rubbing phenomenon is not easy to occur, and the surface precision, bending precision and mechanical property of the manufactured C-shaped piece are improved.

Drawings

FIG. 1 is an isometric view of a partial structure of a molding apparatus according to an embodiment of the present utility model;

FIG. 2 is a front view of a molding apparatus according to an embodiment of the present utility model;

FIG. 3 is a front view of a hidden thickness limiter of a molding apparatus according to an embodiment of the present utility model;

FIG. 4 is a second elevation view of a hidden thickness limiter of a molding apparatus according to an embodiment of the present utility model;

fig. 5 is a front view of a hidden thickness limiter of a molding apparatus according to an embodiment of the present utility model.

In the figure:

10. a first mold; 11. a base; 111. a chute; 12. a first movable block; 121. a sliding part; 122. an abutting portion; 13. a second movable block; 131. a limit part; 1311. a limiting surface; 132. a working section; 1321. a working surface; 14. an arc-shaped portion; 15. a slide block;

20. a second mold; 21. a top surface; 22. a side surface;

30. an elastic member; 40. a connecting belt; 50. a rotating shaft; 60. a thickness limiting member;

210. an upper template; 220. a lower template; 300. a C-shaped member; 310. a web; 320. and (5) flanging.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The molding tool and the molding apparatus provided in this embodiment are described below with reference to fig. 1 to 5.

The embodiment provides a shaping frock, this shaping frock is used for making shaping C shape 300, and C shape 300 includes web 310 and two turn-ups 320, and two turn-ups 320 set up respectively in the both sides of web 310, when shaping through shaping frock, can the shaping through shaping frock compression molding planar prefabricated plate to can pressurize each direction of C shape 300, be difficult for taking place to rub the material phenomenon, improved the surface accuracy, the precision of bending and the mechanical properties of C shape 300 of making.

Specifically, as shown in fig. 1 to 3, the molding tool includes a first mold 10 and a second mold 20 disposed opposite to each other, one of the first mold 10 and the second mold 20 being connectable to an upper die plate 210 of a press, and the other being connectable to a lower die plate 220 of the press; the first mold 10 and the second mold 20 can be opened and closed by a press, and the C-shaped member 300 can be molded. Illustratively, in the present embodiment, the first mold 10 is coupled to the upper die plate 210 and the second mold 20 is coupled to the lower die plate 220.

Further, the first mold 10 includes a base 11, a first movable block 12 and a second movable block 13, and the base 11 can be connected to an upper die plate 210 or a lower die plate 220 of the press; the first movable block 12 is slidably connected to the base 11 along the vertical direction and can be abutted to the base 11, and the first movable block 12 can be abutted to the web 310 of the C-shaped member 300; one end of each of the two second movable blocks 13 is respectively and rotatably connected to two sides of the first movable block 12, the other end of each of the two second movable blocks 13 is movably connected to the base 11, and the second movable blocks 13 can rotate along with the movement of the first movable block 12, so that the limiting surface 1311 is abutted to the base 11, the working surface 1321 is abutted to the flange 320 of the C-shaped piece 300, and a certain pressure is applied to the flange 320 of the C-shaped piece 300; the clamping interval with adjustable size is formed between the first movable block 12 and the two second movable blocks 13, the C-shaped piece 300 is arranged in the clamping interval, and along with the sliding of the first movable block 12, the clamping area is gradually changed, so that the die pressing of the C-shaped piece 300 is realized, the material rubbing phenomenon can not occur, and the pressure of the C-shaped piece 300 in all directions is controllable.

When the forming tool of the embodiment is used for die pressing the C-shaped piece 300, the first die 10 and the second die 20 are opened through the press, the softened precast slab is placed in the middle of the second die 20, the extending distance of two sides of the precast slab is ensured to meet the actual requirement, then the precast slab is pre-bent, the precast slab after pre-bending and the second die 20 are upwards moved together until the web 310 of the precast slab contacts with the first movable block 12, and then upwards movement is continued, at the moment, the first movable block 12 upwards moves, the second movable block 13 rotates towards the flanging 320 of the precast slab until the limiting surface 1311 of the second movable block 13 and the first movable block 12 are abutted against the base 11, at the moment, the first movable block 12 is abutted against the base 11 and gives a certain pressure to the web 310, and the working surfaces 1321 and 320 of the second movable block 13 are abutted against and give a certain pressure to the flanging 320, so that specific pressure can be applied to each position of the C-shaped piece 300, and further the die pressing of the C-shaped piece 300 can be realized; and in the demolding process of the C-shaped piece 300, as the first mold 10 and the second mold 20 are separated, the first movable block 12 and the second movable block 13 move downward, the second movable block 13 rotates and moves away from the flange 320, and then the first movable block 12 and the web 310 are separated, so that the demolding of the C-shaped piece 300 can be completed. Meanwhile, in the process of forming and demolding the C-shaped piece 300 by the forming tool, the opening of the clamping section is larger, the clamping section cannot be scratched with a precast slab directly, after the first movable block 12 is abutted against the web plate 310, the second movable block 13 is contacted with or separated from the flanging 320, the material scratching phenomenon is not easy to occur, and the surface precision, bending precision and mechanical property of the manufactured C-shaped piece 300 are improved.

The openable and closable first mold 10 will be specifically described below. In this embodiment, as shown in fig. 1 to 3, the base 11 has a square structure, one side of the base 11 is provided with a plurality of connecting holes for connecting with the upper template 210 or the lower template 220, and the lower part of the base 11 can be abutted with the limiting surface 1311 during the sliding process of the first movable block 12

Further, one of the base 11 and the first movable block 12 is provided with a sliding groove 111, the other is provided with a sliding block 15, and the sliding block 15 is slidably connected in the sliding groove 111, so that the sliding connection between the first movable block 12 and the base 11 can be realized.

Specifically, the sliding groove 111 is disposed on the base 11, the sliding block 15 is disposed on the first movable block 12, the width of the sliding block 15 is greater than the width of the first movable block 12, and the sliding groove 111 is T-shaped, that is, the sliding groove 111 includes a first groove and a second groove, the width of the first groove is greater than the width of the second groove, the sliding block 15 is slidably connected in the first groove, the first movable block 12 is slidably connected in the second groove, so that the first movable block 12 can be limited, and falling of the sliding block 12 is avoided.

Optionally, the first movable block 12 has an inverted T-shaped structure, that is, the first movable block 12 includes a sliding portion 121 and an abutment portion 122, the sliding portion 121 is slidably connected in the second groove, and the abutment portion 122 can abut against the base 11 to limit the movement of the first movable block 12.

Further, the elastic connection between the first movable block 12 and the base 11 increases the connectivity between the first movable block 12 and the base 11, and simultaneously, when the first movable block 12 slides towards the base 11, the elastic force of the first movable block 12 can be given, so that the first movable block 12 gives a certain pressure to the web 310 of the C-shaped member 300, and the situation that the first movable block 12 and the base 11 collide directly with each other to apply pressure is avoided, the impact between the two is slowed down, the applied pressure value is enhanced, and the web 310 is ensured not to move. Meanwhile, when the C-shaped piece 300 is demolded, the first movable block 12 moves downwards along with the second die 20 and drives the second movable block 13 to rotate and away from the flanging 320, the elastic connection can ensure that the first movable block 12 is abutted with the web 310 in the downward movement process, so that the second movable block 13 is separated from the flanging 320 first, and further, the C-shaped piece 300 cannot be scratched in the process of rotating the second movable block 13 and away from the flanging 320.

Optionally, an elastic member 30 is disposed between the first movable block 12 and the base 11, and the elastic member 30 is disposed between the slider 15 and the bottom of the first groove, so that elastic connection between the two can be achieved.

Further alternatively, the first movable block 12 and the base 11 are respectively provided with a guide groove, a guide column is arranged in the guide groove, the elastic piece 30 is sleeved on the periphery of the guide column, two ends of the elastic piece 30 are respectively arranged in the guide grooves opposite to the first movable block 12 and the base 11, the movement of the first movable block 12 is guided, and a certain limiting and guiding effect is provided for the sliding direction between the first movable block 12 and the base 11.

Alternatively, the elastic member 30 is a spring, which has low cost and good elastic effect.

In order to ensure the lamination of the corners of the C-shaped piece 300, further, the joint of the first movable block 12 and the second movable block 13 forms an arc portion 14, that is, the joint of the first movable block 12 and the second movable block 13 is provided with concentric arc portions with the same diameter, the two arc portions are spliced to form the arc portion 14, and the arc portion 14 is attached to the arc of the corners of the C-shaped piece 300, so that the lamination of the corners of the C-shaped piece 300 is ensured.

Preferably, the size of the arc portion 14 is designed according to the arc size at the corner of the C-shaped member 300 and the resin flowability of the composite material of the C-shaped member 300, so as to ensure a better press-fit effect without occurrence of an overpressure phenomenon.

In this embodiment, as shown in fig. 1 to 3, the second movable block 13 includes a limiting portion 131 and a working portion 132 disposed at a first preset angle, a connecting portion between the limiting portion 131 and the working portion 132 is rotatably connected to the first movable block 12, the other end of the limiting portion 131 is movably connected to the base 11, a surface of the limiting portion 131 facing the base 11 is a limiting surface 1311, a surface of the working portion 132 facing the flange 320 is a working surface 1321, and the limiting portion 131 and the working portion 132 can rotate along with the first movable block 12, so that the limiting surface 1311 abuts against the base 11, and the working surface 1321 abuts against the flange 320 of the C-shaped member 300. It should be noted that, the first predetermined angle is B, and the angles of the web 310 and the flange 320 of the C-shaped member 300 to be formed are a, b=180° -a. That is, when the limiting surface 1311 abuts against the base 11, the angle between the second movable block 13 and the first movable block 12 is ensured to be equal to a.

Further, the forming tool further comprises a connecting belt 40, two ends of the connecting belt 40 are respectively connected with the base 11 and the other end of the limiting portion 131, so that the other end of the second movable block 13 can be connected with the base 11, and when the first movable block 12 moves towards the base 11, one end of the second movable block 13 can gradually approach the base 11 along with the first movable block 12, and the limiting portion 131 can be abutted against the base 11 to limit.

Still further, the first movable block 12 is provided with a rotating shaft 50, the connection part between the limiting part 131 and the working part 132 is provided with a connecting protrusion, and the connecting protrusion is rotatably connected to the rotating shaft 50, namely, the rotating connection between the first movable block 12 and the second movable block 13 can be realized through the rotating shaft 50.

The second mold 20 is specifically described below. In this embodiment, as shown in fig. 1 to 3, the second mold 20 includes a top surface 21 and two side surfaces 22, the top surface 21 and the side surfaces 22 are disposed at a second preset angle, the top surface 21 can be abutted against the web 310, and the side surfaces 22 can be abutted against the flange 320, that is, the bottom of the C-shaped member 300 is abutted by the second mold 20, so that the C-shaped member 300 is formed under the common clamping of the first mold 10 and the second mold 20. It should be noted that, the second preset angle is D, and the angles of the web 310 and the flange 320 of the C-shaped member 300 to be molded are a, d=a; that is, when the limiting surface 1311 abuts against the base 11, the angle between the second movable block 13 and the first movable block 12 is ensured to be equal to a.

It can be understood that when the C-shaped pieces 300 with different angles of the web 310 and the flange 320 are formed, the corresponding first mold 10 and the second mold 20 need to be replaced, that is, the angle B and the angle D are changed along with the change of the angle a, so that the first mold 10 and the second mold 20 need to be correspondingly changed, and the manufacturing of the C-shaped pieces 300 with different bending angle requirements can be further satisfied.

In order to protect the surface of the first mold 10 facing the second mold 20 and the surface of the second mold 20 facing the first mold 10, preferably, the top surface 21 and the side surface 22 are both provided with a thickness limiting member 60, and the thickness of the thickness limiting member 60 is smaller than that of the C-shaped member 300, that is, when the first mold 10 and the second mold 20 are pressed together, the surfaces pressing the C-shaped member 300 are not in direct collision contact, so that the impact force is reduced, damage is avoided, and the surface precision of the forming tool when forming the C-shaped member 300 is improved.

Further, the second movable block 13 and the second mold 20 are provided with a plurality of forming tools, i.e. a plurality of different forming tools are designed according to angles of the web 310 and the flange 320 of different C-shaped pieces 300, so as to realize forming and manufacturing of the C-shaped pieces 300 with different angles of the web 310 and the flange 320.

The embodiment also provides a molding device, which comprises a press and the molding tool according to any one of the above schemes, wherein the press comprises an upper die plate 210 and a lower die plate 220, the relative positions of the upper die plate 210 and the lower die plate 220 are adjustable, one of the first die 10 and the second die 20 is connected with the upper die plate 210, the other is connected with the lower die plate 220, and the opening and closing between the first die 10 and the second die 20 can be realized by adjusting the relative positions between the upper die plate 210 and the lower die plate 220, so that the compression molding of the C-shaped piece 300 is realized.

The step of compression molding the C-shaped member 300 using the composite material by the molding apparatus of the present embodiment will be described below with reference to fig. 2 to 5.

In a first step, the preformed sheet is prepared and the preformed sheet of thermoplastic composite material to be molded is clamped and heated to a molding temperature.

In the second step, the first mold 10 is mounted on the upper mold plate 210, the second mold 20 is mounted on the lower mold plate 220, and the upper second mold 20 is controlled to be far away from each other by controlling the press, so that the upper second mold 20 is opened, and the heated and softened prefabricated plate is placed at the middle position of the first mold 10 and the second mold 20.

And thirdly, the prefabricated plate is pre-bent on the second die 20, so that the prefabricated plate is attached to the top surface 21 and the two side surfaces 22 of the second die 20, and the C-shaped piece 300 is preformed.

Fourth, the press is controlled to move the second mold 20 upward together with the preformed C-shaped member 300 so that the web 310 of the C-shaped member 300 is fitted to the first movable block 12 and begins to press against the web 310 by the elastic force of the elastic member 30.

And fifthly, controlling the press to move the second die 20, the C-shaped piece 300 and the first movable block 12 upwards together to drive the working face 1321 of the second movable block 13 to rotate towards the flanging 320 of the C-shaped piece 300, so that the second movable block 13 presses the flanging 320, and the material rubbing of the flanging 320 during die assembly is avoided.

And a sixth step of maintaining the state for a certain time, that is, maintaining the pressure for a certain time.

Seventh, in the initial stage of demolding, the press is controlled to move the second mold 20 and the C-shaped piece 300 downwards, and the first movable block 12 moves downwards together under the action of the elastic piece 30, so that the first movable block 12 and the web 310 are still in an abutting state; simultaneously, the second movable block 13 rotates to two sides under the action of the connecting belt 40, so that the second movable block 13 is separated from the flanging 320 of the C-shaped piece 300, and then continues to move downwards, and the first movable block 12 is separated from the web 310, so that the material rubbing during demolding is avoided.

Eighth, the second mold 20 and the C-shaped member 300 continue to move downward, the first mold 10 is maintained in an opened state, and the second mold 20 and the C-shaped member 300 continue to move downward to the initial position.

And ninth, removing the C-shaped piece 300 from the second die 20, and demolding the C-shaped piece 300.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. The forming tool is characterized by being used for manufacturing a formed C-shaped piece (300), and comprises a first die (10) and a second die (20) which are oppositely arranged, wherein one of the first die (10) and the second die (20) can be connected with an upper die plate (210) of a press, and the other can be connected with a lower die plate (220) of the press; wherein the first mold (10) comprises:

a base (11) connectable to an upper die plate (210) or a lower die plate (220) of the press;

the first movable block (12) is connected to the base (11) in a sliding manner along the vertical direction and can be abutted to the base (11), and the first movable block (12) can be abutted to the web (310) of the C-shaped piece (300);

two second movable blocks (13), one end of each of which is rotatably connected to two sides of the first movable block (12), and the other end of each of which is movably connected to the base (11), wherein each of the second movable blocks (13) comprises a limiting surface (1311) and a working surface (1321), and the second movable blocks (13) can rotate along with the movement of the first movable block (12) so that the limiting surface (1311) is abutted to the base (11), and the working surface (1321) is abutted to the flanging (320) of the C-shaped piece (300); and a clamping interval with adjustable size is formed between the first movable block (12) and the two second movable blocks (13), and the C-shaped piece (300) is arranged in the clamping interval.

2. The forming tool according to claim 1, wherein one of the base (11) and the first movable block (12) is provided with a chute (111), the other is provided with a slider (15), and the slider (15) is slidably connected in the chute (111).

3. The forming tool according to claim 1, characterized in that the first movable block (12) is elastically connected with the base (11).

4. The forming tool according to claim 1, wherein the connection of the first movable block (12) and the second movable block (13) forms an arc-shaped portion (14).

5. The forming tool according to claim 1, wherein the second movable block (13) comprises a limiting portion (131) and a working portion (132) which are arranged at a first preset angle, the connecting portion of the limiting portion (131) and the working portion (132) is rotationally connected to the first movable block (12), the other end of the limiting portion (131) is movably connected to the base (11), one surface of the limiting portion (131) facing the base (11) is a limiting surface (1311), and one surface of the working portion (132) facing the flange (320) is a working surface (1321).

6. The forming tool according to claim 5, further comprising a connecting band (40), wherein two ends of the connecting band (40) are connected to the other ends of the base (11) and the limiting portion (131), respectively.

7. The forming tool according to claim 5, wherein the first movable block (12) is provided with a rotating shaft (50) in a penetrating manner, and a connection protrusion is arranged at a connection position of the limiting portion (131) and the working portion (132) and is rotatably connected to the rotating shaft (50).

8. The forming tool according to any one of claims 1-7, wherein the second mold (20) comprises a top surface (21) and two side surfaces (22), the top surface (21) and the side surfaces (22) are arranged at a second predetermined angle, the top surface (21) can be abutted to the web (310), and the side surfaces (22) can be abutted to the flange (320).

9. The forming tool according to claim 8, wherein the top surface (21) and the side surface (22) are each provided with a thickness limiting member (60), and the thickness of the thickness limiting member (60) is smaller than the thickness of the C-shaped member (300).

10. Molding apparatus, characterized in that it comprises a press and a molding tool according to any one of claims 1-9, said press comprising an upper die plate (210) and a lower die plate (220), the relative position of said upper die plate (210) and said lower die plate (220) being adjustable, one of said first die (10) and said second die (20) being connected to said upper die plate (210) and the other to said lower die plate (220).