Large combined punch for hot pressing forming of composite materials and process method

Abstract

The present invention relates to a combined punch for hot pressing large template frames for composite materials and a process method. After the large template hot pressing die completes the hot pressing manufacture of the template, it is discarded, which will cause waste of resources and high production costs. To overcome these deficiencies, the present invention provides a combined punch for hot pressing large template frames for composite materials and a process method, which mainly consists of segmented hot pressing punches, screws and positioning pins. The segmented hot pressing punches adopt a template group-welded grid frame structure. On this frame, each segmented punch template is hot pressed and formed. Then, each segmented template group-welded grid frame is connected to an integral grid frame type support body through screws and positioning pins. Taking this integral support body as a reference, the surplus of the segmented punch template is cut and secondary shaping is carried out, and then the segmented punch templates are group-welded. In this way, the idle waste of the support body of the segmented hot pressing punch is effectively reduced and the utilization rate is improved, and the quality and precision of the segmented punch templates are further guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of mechanical technology manufacturing, and particularly relates to a large-sized plate frame combined punch for hot pressing of composite materials and a process method thereof. Background Art

[0002] At present, thin-shell molds are suitable for vacuum high-pressure forming of composite material thin-shell products in an autoclave. Among them, the hot pressing mold of the forming plate of the thin-shell mold is used for the preliminary forming of the shape of the mold panel in the design of the thin-shell mold. When the product size is large, according to the requirements of general rolling machines, the part size cannot exceed 1000×800mm. If the product exceeds this size, it means that the mold panel of the thin-shell mold cannot be completed at one time, and a large-sized plate hot pressing mold of this kind of structure should be adopted. Therefore, according to the product situation, the hot pressing punch and the hot pressing die are segmented evenly. In the process of mold design and manufacturing, on the premise of ensuring quality and mold accuracy requirements, reducing costs is the first consideration. The large-sized plate hot pressing mold is generally composed of Q235 steel plates with a thickness of 10mm welded crosswise to form a grid type. The main disadvantages are that the number of steel plates is large, the weight is heavy, and the production cost is high. The steel plates are cut, laser cut, and the plate groups are welded to form segmented hot pressing dies and segmented hot pressing punches respectively to form a large-sized plate hot pressing mold; the surface curvature of each plate of the hot pressing mold is different, the accuracy requirements for the plate are high, the process is complex, and the assembly and installation are complex; if a large-sized plate hot pressing mold composed of multiple plates is discarded, it will cause waste of resources, and the human and material resources invested in the early stage do not reflect high value. In view of these deficiencies, after the plate hot pressing manufacturing is completed, reducing costs is the main purpose. Therefore, how to design a process method for reducing costs on the premise of ensuring the quality and accuracy requirements of the mold surface is an urgent problem to be solved in the vacuum high-pressure forming of composite material thin-shell products. Summary of the Invention

[0003] The technical problem to be solved by the present invention is that in the autoclave vacuum high-pressure forming of composite thin-shell products, there are a large number of steel plates, which are heavy, and at the same time, high precision requirements are imposed on the formwork. Laser cutting and formwork group welding are used, the process is complex, the assembly and installation are complex, the production cost is high, and the large formwork hot pressing die composed of multiple formwork group welds is discarded after the formwork hot pressing manufacturing is completed, which will cause waste of resources, and the human and material resources invested in the early stage do not reflect high value. In order to overcome these existing deficiencies, a large formwork frame combined punch for hot pressing of composites and a process method can be designed. The large formwork frame combined punch adopts a combined welding and segmented hot pressing punch and a process method, reusing the hot pressing punch, minimizing costs on the premise of ensuring quality and die precision requirements, reducing waste of human and material resources. The purpose of the present invention is to provide a large formwork frame combined punch for hot pressing of composites and a process method. The large formwork frame combined punch is composed of segmented hot pressing punches, screws and positioning pins. The segmented hot pressing punches adopt a formwork group welding grid frame structure. The segmented hot pressing punches are connected to each other through screws and positioning pins to complete an integral grid frame support body. Based on this integral grid frame support body, the welding of the formwork panels of each segmented punch is carried out. The formwork panels of each segmented punch are fixed on the integral grid frame support body, the surplus of the formwork panels of the segmented punches is cut, secondary shaping is carried out, the formwork panels of the segmented punches are group welded, and the surface error is detected to ensure the quality and precision of the formwork panels of the segmented punches; after hot pressing the formwork panels of each segmented hot pressing punch on the support body of each segmented hot pressing punch, the formwork panels of the segmented punches are welded on the frame support body of each segmented hot pressing punch, reducing the waste of the idle hot pressing forming support body, reducing the waste of materials and the formwork processing cost, effectively reducing the manufacturing cost, and improving the die utilization rate.

[0004] The technical solution adopted by the present invention to solve its technical problems is as follows:

[0005] A large formwork frame combined punch for hot pressing of composites, which is composed of segmented hot pressing punches, screws and positioning pins. The number of segmented hot pressing punches is determined according to the size of the composite parts. The size of the segmented hot pressing punches shall not exceed 1000×800mm. Its characteristics are as follows: Taking the composition of 6 segmented hot pressing punches as an example to illustrate the structural composition of the large formwork frame combined punch for hot pressing of composites. The hot pressing combined die is composed of a first-stage hot pressing punch (1), a second-stage hot pressing punch (2), a third-stage hot pressing punch (3), a fourth-stage hot pressing punch (4), a fifth-stage hot pressing punch (5), a sixth-stage hot pressing punch (6), screws and positioning pins, and are rigidly connected by welding to each other; The first-stage hot pressing punch (1), the second-stage hot pressing punch (2), the third-stage hot pressing punch (3), the fourth-stage hot pressing punch (4), the fifth-stage hot pressing punch (5), and the sixth-stage hot pressing punch (6) are collectively referred to as segmented hot pressing punches.

[0006] The first-stage hot pressing punch (1), second-stage hot pressing punch (2), third-stage hot pressing punch (3), fourth-stage hot pressing punch (4), fifth-stage hot pressing punch (5) and sixth-stage hot pressing punch (6) are all rigidly connected by screws and positioning pins. The third-stage hot pressing punch (3) is rigidly connected to the first-stage hot pressing punch (1) and the fifth-stage hot pressing punch (5) by screws and positioning pins respectively. The fourth-stage hot pressing punch (4) is rigidly connected to the second-stage hot pressing punch (2) and the sixth-stage hot pressing punch (6) by screws and positioning pins respectively.

[0007] The first-stage hot pressing punch (1), second-stage hot pressing punch (2), third-stage hot pressing punch (3), fourth-stage hot pressing punch (4), fifth-stage hot pressing punch (5), and sixth-stage hot pressing punch (6) have the same structure and are both composed of a segmented punch model panel and a template. The first-stage punch model panel (1-14), second-stage punch model panel (2-1), third-stage punch model panel (3-1), fourth-stage punch model panel (4-1), fifth-stage punch model panel (5-1), and sixth-stage punch model panel (6-1) are collectively referred to as the segmented punch model panels. The segmented punch model panels are all made of ordinary steel plates with a thickness of 8-10 mm, and are roll-formed by rough machining on a roll press according to the process digital model of the composite material part and are hot-pressed and finely formed on the grid-type frame structure support of the segmented hot pressing punch. The digital model of the segmented punch model panel is consistent with the digital model of the composite material part. Taking the first-stage hot pressing punch (1) as an example to illustrate the structural composition of these six segmented hot pressing punches, the first-stage hot pressing punch (1) is composed of a first-stage punch model panel (1-14), a first-stage front horizontal template (1-1), a first-stage middle horizontal template one (1-2), a first-stage middle horizontal template two (1-3), a first-stage middle horizontal template three (1-4), a first-stage middle horizontal template four (1-5), a first-stage middle horizontal template five (1-6), a first-stage rear horizontal template (1-7), a first-stage front vertical template (1-8), a first-stage middle vertical template one (1-9), a first-stage middle vertical template two (1-10), a first-stage middle vertical template three (1-11), a first-stage middle vertical template four (1-12), and a first-stage rear vertical template (1-13). The first-stage punch model panel (1-14) is rigidly connected by welding to 12 templates, including the first-stage front horizontal template (1-1), the first-stage middle horizontal template one (1-2), the first-stage middle horizontal template two (1-3), the first-stage middle horizontal template three (1-4), the first-stage middle horizontal template four (1-5), the first-stage middle horizontal template five (1-6), the first-stage rear horizontal template (1-7), the first-stage front vertical template (1-8), the first-stage middle vertical template one (1-9), the first-stage middle vertical template two (1-10), the first-stage middle vertical template three (1-11), the first-stage middle vertical template four (1-12), and the first-stage rear vertical template (1-13). The 12 templates are all made of ordinary steel plates with a thickness of 7-8 mm, and the 12 templates are rigidly connected to each other by inserting slots, buckles, and card slots to form the grid-type frame structure support of the first-stage hot pressing punch (1). The grid interval size is 200-300 mm, and the grid interval size and quantity are determined by the size of the composite material product part.

[0008] The one-section front transverse plate (1-1), the one-section rear transverse plate (1-7), the one-section front longitudinal plate (1-8), and the one-section rear longitudinal plate (1-13) are rigidly connected by welding. The one-section front transverse plate (1-1) and the one-section rear transverse plate (1-7) are respectively rigidly connected to the one-section middle longitudinal plate two (1-10), the one-section middle longitudinal plate three (1-11), and the one-section middle longitudinal plate four (1-12) by the template slot hole one (1-2-3) and the template buckle two (1-10-4). The spacing dimension is 200 - 300 mm, and the spacing dimension and quantity are determined by the dimensions of the composite material product parts.

[0009] The one-section front longitudinal plate (1-8) and the one-section rear longitudinal plate (1-13) are respectively rigidly connected to the one-section middle transverse plate one (1-2), the one-section middle transverse plate two (1-3), the one-section middle transverse plate three (1-4), the one-section middle transverse plate four (1-5), and the one-section middle transverse plate five (1-6) by the template slot hole two (1-8-3) and the template buckle one (1-3-4). The spacing dimension is 200 - 300 mm, and the spacing dimension and quantity are determined by the dimensions of the composite material product parts.

[0010] The one-section middle longitudinal plate one (1-9) is connected to the one-section middle transverse plate one (1-2), the one-section middle transverse plate two (1-3), the one-section middle transverse plate three (1-4), the one-section middle transverse plate four (1-5), and the one-section middle transverse plate five (1-6) by plugging with the template slot two (1-9-3) and the template slot one (1-3-3). The plugging assembly gap is 0.8 - 1.8 mm.

[0011] The one-section middle longitudinal plate two (1-10), the one-section middle longitudinal plate three (1-11), and the one-section middle longitudinal plate four (1-12) are respectively connected to the one-section middle transverse plate one (1-2), the one-section middle transverse plate two (1-3), the one-section middle transverse plate three (1-4), the one-section middle transverse plate four (1-5), and the one-section middle transverse plate five (1-6) by plugging with the template slot three (1-10-3). The plugging assembly gap is 0.8 - 1.8 mm.

[0012] The one-section front transverse plate (1-1) and the one-section rear transverse plate (1-7) have the same structure. Taking the one-section front transverse plate (1-1) as an example to illustrate the structural composition of these two transverse plates, the one-section front transverse plate (1-1) consists of the matrix one (1-2-1), the profile one (1-2-2), and the template slot hole one (1-2-3). The outer shape of the matrix one (1-2-1) is processed by a wire cutting device. The digital model of the profile (1-1-2) is consistent with the process digital model of the composite material product parts. The spacing dimension of the template slot hole one (1-2-3) is 200 - 300 mm, and the spacing dimension and quantity are determined by the dimensions of the composite material product parts.

[0013] The first intermediate transverse template (1-2), the second intermediate transverse template (1-3), the third intermediate transverse template (1-4), the fourth intermediate transverse template (1-5), and the fifth intermediate transverse template (1-6) adopt the same structure. Taking the first intermediate transverse template (1-2) as an example to illustrate the structural composition of these five transverse templates, the first intermediate transverse template (1-2) is composed of a second matrix (1-3-1), a second profile surface (1-3-2), a first template slot (1-3-3), and a first template buckle (1-3-4). The outer shape of the second matrix (1-3-1) is processed by wire cutting equipment. The digital model of the second profile surface (1-3-2) is consistent with the process digital model of the composite material product part. The interval dimension of the first template slot (1-3-3) is 80-120 mm, and the interval dimension and quantity are consistent with the first template slot hole (1-2-3) of the first front transverse template (1-1).

[0014] The first front longitudinal template (1-8) and the first rear longitudinal template (1-13) adopt the same structure. Taking the first front longitudinal template (1-8) as an example to illustrate the structural composition of these two longitudinal templates, the first front longitudinal template (1-8) is composed of a third matrix (1-8-1), a third profile surface (1-8-2), and a second template slot hole (1-8-3). The outer shape of the third matrix (1-8-1) is processed by wire cutting equipment. The digital model of the third profile surface (1-8-2) is consistent with the process digital model of the composite material product part. The interval dimension of the second template slot hole (1-8-3) is 200-300 mm, and the interval dimension and quantity are determined by the dimensions of the composite material product part.

[0015] The first intermediate longitudinal template (1-9) is composed of a fourth matrix (1-9-1), a fourth profile surface (1-9-2), a second template slot (1-9-3), and a first template connection hole (1-9-4). The outer shape of the fourth matrix (1-9-1) is processed by wire cutting equipment. The digital model of the fourth profile surface (1-9-2) is consistent with the process digital model of the composite material product part. The interval dimension of the second template slot (1-9-3) is 200-300 mm, and the interval dimension and quantity are consistent with the second template slot hole (1-8-3) of the first front longitudinal template (1-8).

[0016] The first intermediate longitudinal plate two (1-10), the first intermediate longitudinal plate three (1-11), and the first intermediate longitudinal plate four (1-12) adopt the same structure. Taking the first intermediate longitudinal plate two (1-10) as an example to illustrate the structural composition of these three longitudinal plates, the first intermediate longitudinal plate two (1-10) is composed of a matrix five (1-10-1), a profile five (1-10-2), a template slot three (1-10-3), and a template buckle two (1-10-4). The outer shape of the matrix five (1-10-1) is processed by a wire cutting device. The digital model of the profile five (1-10-2) is consistent with the process digital model of the composite material product part. The interval dimension of the template slot three (1-10-3) is 80-120 mm, and the interval dimension and quantity are consistent with the template slot hole two (1-8-3) of the first front longitudinal plate (1-8).

[0017] The process method of the large template frame combined punch for hot pressing forming of composite materials is as follows:

[0018] (1) According to the three-dimensional digital model of the composite material part, the working conditions of hot curing forming, and the finite element stress analysis, etc., a three-dimensional process digital model with a thickness of 10 mm is constructed as the digital model of the punch and die template of the hot pressing die.

[0019] (2) According to the requirements of the general rolling machine tool, the part size cannot exceed 1000×800 mm. If the composite material part exceeds 1000×800 mm, it means that the template of the hot pressing die cannot be rolled in one time. Therefore, according to the situation of the composite material part, the digital model of the punch and die template of the hot pressing die is evenly segmented, and the segmented hot pressing punch and the segmented hot pressing die are used. Taking the composite material part with a size of 6000×800 mm and divided into 6 segments of hot pressing punch as an example, the digital model of the template of the first hot pressing punch (1), the second hot pressing punch (2), the third hot pressing punch (3), the fourth hot pressing punch (4), the fifth hot pressing punch (5), and the sixth hot pressing punch (6) is established.

[0020] (3) Establish the digital models of each segment of the hot pressing punch and die. Taking the first hot pressing punch (1) as an example to illustrate the digital models of each segment of the hot pressing punch and die, the first hot pressing punch (1) is composed of a first punch template (1-14), a first front transverse plate (1-1), a first intermediate transverse plate one (1-2), a first intermediate transverse plate two (1-3), a first intermediate transverse plate three (1-4), a first intermediate transverse plate four (1-5), a first intermediate transverse plate five (1-6), a first rear transverse plate (1-7), a first front longitudinal plate (1-8), a first intermediate longitudinal plate one (1-9), a first intermediate longitudinal plate two (1-10), a first intermediate longitudinal plate three (1-11), a first intermediate longitudinal plate four (1-12), and a first rear longitudinal plate (1-13); the first hot pressing die (7) adopts the same composition.

[0021] (4) Rough-machine the segmented convex die model panel. Taking one-section convex die model panel (1-14) and one-section hot-press concave die model panel (7-1) as examples, prepare a steel plate with a thickness of 10 mm. It is possible to roll two one-section convex die model panels (1-14) at one time on a rolling machine, and separate them after calibration, leaving a machining error amount and a welding adjustment allowance, which are used as one-section convex die model panel (1-14) and one-section hot-press concave die model panel (7-1).

[0022] (5) Machine the horizontal and vertical plates of one-section hot-press convex die (1) and one-section hot-press concave die (7). Prepare a steel plate with a thickness of 8 mm. Taking the horizontal and vertical plates of one-section hot-press convex die (1) as an example to illustrate the machining method of the horizontal and vertical plates. The digital models of one-section front horizontal plate (1-1), one-section middle horizontal plate one (1-2), one-section middle horizontal plate two (1-3), one-section middle horizontal plate three (1-4), one-section middle horizontal plate four (1-5), one-section middle horizontal plate five (1-6), one-section rear horizontal plate (1-7), one-section front vertical plate (1-8), one-section middle vertical plate one (1-9), one-section middle vertical plate two (1-10), one-section middle vertical plate three (1-11), one-section middle vertical plate four (1-12), and one-section rear vertical plate (1-13) are machined on a wire cutting machine.

[0023] (6) Assemble and weld the grid-frame support of one-section hot-press convex die (1) and one-section hot-press concave die (7). Taking the horizontal and vertical plates of one-section hot-press convex die (1) as an example to illustrate the assembly and welding process of the grid-frame support of one-section hot-press convex die (1) and one-section hot-press concave die (7). Assemble and weld the 13 types of plates, namely one-section front horizontal plate (1-1), one-section middle horizontal plate one (1-2), one-section middle horizontal plate two (1-3), one-section middle horizontal plate three (1-4), one-section middle horizontal plate four (1-5), one-section middle horizontal plate five (1-6), one-section rear horizontal plate (1-7), one-section front vertical plate (1-8), one-section middle vertical plate one (1-9), one-section middle vertical plate two (1-10), one-section middle vertical plate three (1-11), one-section middle vertical plate four (1-12), and one-section rear vertical plate (1-13), which are machined qualified in step (5), together by using snap-fastener and slot type and slot insertion, and then weld them to form the grid-frame support of one-section hot-press convex die (1). Its main function is to provide sufficient support for one-section convex die model panel (1-14), which can not only ensure strength but also reduce weight, save cost and quickly heat the back of the die.

[0024] (7) Finish-machine the segmented convex die model plate. Take the first-stage convex die model plate (1-14) and the first-stage hot-pressing concave die model plate (7-1) as an example. Place the first-stage convex die model plate (1-14) or the first-stage hot-pressing concave die model plate (7-1) rough-machined in step (4) into a heating furnace, heat it within the temperature range of 750-800°C, take it out and place it on the grid-frame support of the first-stage hot-pressing convex die (1), clamp the first-stage hot-pressing concave die (7) with a punching fixture for stamping forming, wait for it to cool and then take it out. After taking it out, preliminarily detect whether it conforms to the surface of the first-stage convex die model plate (1-14) and the first-stage hot-pressing concave die model plate (7-1). If it is qualified, proceed to the finish machining of the next die model plate.

[0025] (8) Assemble and weld the second-stage hot-pressing convex die (2), the third-stage hot-pressing convex die (3), the fourth-stage hot-pressing convex die (4), the fifth-stage hot-pressing convex die (5), and the sixth-stage hot-pressing convex die (6) using the same processes as in steps (3), (4), (5), (6), and (7).

[0026] (9) Assemble and weld the hot-pressing forming large die plate frame combined convex die for composite materials. For the grid-frame supports of the first-stage hot-pressing convex die (1), the second-stage hot-pressing convex die (2), the third-stage hot-pressing convex die (3), the fourth-stage hot-pressing convex die (4), the fifth-stage hot-pressing convex die (5), and the sixth-stage hot-pressing convex die (6) assembled and welded in step (6), that is, the frame supports of each segmented hot-pressing convex die of the hot-pressing formed segmented convex die model plate, rigidly connect them into an integral grid-frame support through screws and positioning pins. Then, taking this integral grid-frame support as a reference, cut the surplus of the six segmented convex die model plates, namely the first-stage convex die model plate (1-14), the second-stage convex die model plate (2-1), the third-stage convex die model plate (3-1), the fourth-stage convex die model plate (4-1), the fifth-stage convex die model plate (5-1), and the sixth-stage convex die model plate (6-1), remove the machining error amount, the welding adjustment allowance, and the secondary re-machining. After passing the inspection, complete the welding of the hot-pressing forming large die plate frame combined convex die for composite materials. Description of the Drawings

[0027] Figure 1 It is a schematic structural diagram of the hot-pressing convex die of the present invention.

[0028] Figure 2 It is an exploded view schematic diagram of the hot-pressing convex die of the present invention.

[0029] Figure 3 It is a schematic structural diagram of the first-stage hot-pressing convex die (1) with the first-stage convex die model plate (1-14) removed according to the present invention.

[0030] Figure 4 It is a schematic structural diagram of the first-stage convex die model plate (1-14) according to the present invention.

[0031] Figure 5It is a schematic structural diagram of a front horizontal plate (1-1) of the present invention.

[0032] Figure 6 It is a schematic structural diagram of an intermediate horizontal plate one (1-2) of the present invention.

[0033] Figure 7 It is a schematic structural diagram of a front longitudinal plate (1-8) of the present invention.

[0034] Figure 8 It is a schematic structural diagram of an intermediate longitudinal plate one (1-9) of the present invention.

[0035] Figure 9 It is a schematic structural diagram of an intermediate longitudinal plate two (1-10) of the present invention.

[0036] Figure 10 It is a schematic diagram of the hot pressing method of a convex die panel (1-14) of the present invention.

[0037] 1 - First-stage hot pressing convex die, 2 - Second-stage hot pressing convex die, 3 - Third-stage hot pressing convex die, 4 - Fourth-stage hot pressing convex die, 5 - Fifth-stage hot pressing convex die, 6 - Sixth-stage hot pressing convex die, 7 - First-stage hot pressing concave die. Specific implementation manner

[0038] This technical solution can also be realized by the following technical measures, and the present invention will be further described below with reference to the accompanying drawings: Figure 1 It is a schematic structural diagram of the hot pressing convex die of the present invention, Figure 2It is an exploded view schematic diagram of the hot pressing punch of the present invention. The large-sized plate frame combined punch for hot pressing of composite materials is composed of segmented hot pressing punches, screws and positioning pins. The number of segmented hot pressing punches is determined according to the size of the composite material part. The size of the segmented hot pressing punch shall not exceed 1000×800mm. It is characterized in that: taking the composition of 6 segmented hot pressing punches as an example to illustrate the structural composition of the large-sized plate frame combined punch for hot pressing of composite materials. The hot pressing combined die is composed of a first-segment hot pressing punch (1), a second-segment hot pressing punch (2), a third-segment hot pressing punch (3), a fourth-segment hot pressing punch (4), a fifth-segment hot pressing punch (5), a sixth-segment hot pressing punch (6), screws and positioning pins, and are rigidly connected by welding to each other; the first-segment hot pressing punch (1), the second-segment hot pressing punch (2), the third-segment hot pressing punch (3), the fourth-segment hot pressing punch (4), the fifth-segment hot pressing punch (5), the sixth-segment hot pressing punch (6) are collectively referred to as segmented hot pressing punches; the first-segment hot pressing punch (1) and the second-segment hot pressing punch (2), the third-segment hot pressing punch (3) and the fourth-segment hot pressing punch (4), the fifth-segment hot pressing punch (5) and the sixth-segment hot pressing punch (6) are all rigidly connected by screws and positioning pins. The third-segment hot pressing punch (3) is respectively rigidly connected to the first-segment hot pressing punch (1) and the fifth-segment hot pressing punch (5) by screws and positioning pins. The fourth-segment hot pressing punch (4) is respectively rigidly connected to the second-segment hot pressing punch (2) and the sixth-segment hot pressing punch (6) by screws and positioning pins; the first-segment hot pressing punch (1), the second-segment hot pressing punch (2), the third-segment hot pressing punch (3), the fourth-segment hot pressing punch (4), the fifth-segment hot pressing punch (5), the sixth-segment hot pressing punch (6) are composed of the same structure, and are all composed of 1 segmented punch template and multiple templates. The first-segment punch template (1-14), the second-segment punch template (2-1), the third-segment punch template (3-1), the fourth-segment punch template (4-1), the fifth-segment punch template (5-1), the sixth-segment punch template (6-1) are collectively referred to as segmented punch templates.

[0039] Figure 3It is a schematic structural diagram of a hot pressing punch (1) with a section of convex die panel (1-14) removed according to the present invention. The hot pressing punches (1), (2), (3), (4), (5), and (6) of six sections adopt the same structure. Taking the hot pressing punch (1) of one section as an example to illustrate the structural composition of these six sectional hot pressing punches, the hot pressing punch (1) of one section is composed of a convex die panel (1-14) of one section, a front transverse plate (1-1) of one section, an intermediate transverse plate 1 (1-2) of one section, an intermediate transverse plate 2 (1-3) of one section, an intermediate transverse plate 3 (1-4) of one section, an intermediate transverse plate 4 (1-5) of one section, an intermediate transverse plate 5 (1-6) of one section, a rear transverse plate (1-7) of one section, a front longitudinal plate (1-8) of one section, an intermediate longitudinal plate 1 (1-9) of one section, an intermediate longitudinal plate 2 (1-10) of one section, an intermediate longitudinal plate 3 (1-11) of one section, an intermediate longitudinal plate 4 (1-12) of one section, and a rear longitudinal plate (1-13) of one section; the convex die panel (1-14) of one section is rigidly connected by welding to 12 types of plates, and the 12 types of plates include a front transverse plate (1-1) of one section, an intermediate transverse plate 1 (1-2) of one section, an intermediate transverse plate 2 (1-3) of one section, an intermediate transverse plate 3 (1-4) of one section, an intermediate transverse plate 4 (1-5) of one section, an intermediate transverse plate 5 (1-6) of one section, a rear transverse plate (1-7) of one section, a front longitudinal plate (1-8) of one section, an intermediate longitudinal plate 1 (1-9) of one section, an intermediate longitudinal plate 2 (1-10) of one section, an intermediate longitudinal plate 3 (1-11) of one section, an intermediate longitudinal plate 4 (1-12) of one section, and a rear longitudinal plate (1-13) of one section. The 12 types of plates are all made of ordinary steel plates with a thickness of 7-8 mm. The 12 types of plates are rigidly connected to form a grid-like frame structure support body of the hot pressing punch (1) of one section through slot insertion, snap-fasteners, and card slots. The grid interval size is 200-300 mm, and the grid interval size and quantity are determined by the size of the composite material product part; the front transverse plate (1-1) of one section, the rear transverse plate (1-7) of one section, the front longitudinal plate (1-8) of one section, and the rear longitudinal plate (1-13) of one section are rigidly connected by welding. The front transverse plate (1-1) of one section and the rear transverse plate (1-7) of one section are respectively rigidly connected to the intermediate longitudinal plate 2 (1-10) of one section, the intermediate longitudinal plate 3 (1-11) of one section, and the intermediate longitudinal plate 4 (1-12) of one section through a plate card slot hole 1 (1-2-3) and a plate snap-fastener 2 (1-10-4). The interval size is 200-300 mm, and the interval size and quantity are determined by the size of the composite material product part;The said first longitudinal plate (1-8) and first rear longitudinal plate (1-13) are rigidly connected to the first intermediate transverse plate (1-2), second intermediate transverse plate (1-3), third intermediate transverse plate (1-4), fourth intermediate transverse plate (1-5), and fifth intermediate transverse plate (1-6) respectively by means of the second template slot hole (1-8-3) and the first template buckle (1-3-4), with a spacing dimension of 200 - 300 mm. The spacing dimension and quantity are determined by the dimensions of the composite material product parts. The said first intermediate longitudinal plate (1-9) is connected to the first intermediate transverse plate (1-2), second intermediate transverse plate (1-3), third intermediate transverse plate (1-4), fourth intermediate transverse plate (1-5), and fifth intermediate transverse plate (1-6) by means of the second template slot (1-9-3) and the first template slot (1-3-3) in an inserted connection, and the inserted assembly gap is 0.8 - 1.8 mm. The said second intermediate longitudinal plate (1-10), third intermediate longitudinal plate (1-11), and fourth intermediate longitudinal plate (1-12) are respectively connected to the first intermediate transverse plate (1-2), second intermediate transverse plate (1-3), third intermediate transverse plate (1-4), fourth intermediate transverse plate (1-5), and fifth intermediate transverse plate (1-6) by means of the third template slot (1-10-3) in an inserted connection, and the inserted assembly gap is 0.8 - 1.8 mm.

[0040] Figure 4 It is a structural schematic diagram of the first convex template panel (1-14) of the present invention. The said first convex template panel (1-14), second convex template panel (2-1), third convex template panel (3-1), fourth convex template panel (4-1), fifth convex template panel (5-1), and sixth convex template panel (6-1) are collectively referred to as segmented convex template panels. The segmented convex template panels are all made of ordinary steel plates with a thickness of 8 - 10 mm, and are roll-formed roughly on a rolling press according to the process digital model of the composite material parts and hot-pressed and finished on the grid-type frame structure support of the segmented hot-pressing punch. The digital model of the segmented convex template panel is consistent with the digital model of the composite material parts. Taking the first convex template panel (1-14) as an example to illustrate the composition of the segmented convex template panel.

[0041] Figure 5It is a schematic structural diagram of the first front cross-shaped plate (1-1) of the present invention. The first front cross-shaped plate (1-1) and the first rear cross-shaped plate (1-7) adopt the same structure. Taking the first front cross-shaped plate (1-1) as an example to illustrate the structural composition of these two cross-shaped plates, the first front cross-shaped plate (1-1) is composed of a first base body (1-2-1), a first profile surface (1-2-2), and a first plate slot hole (1-2-3). The outer shape of the first base body (1-2-1) is processed by a wire cutting device. The digital model of the profile surface (1-1-2) is consistent with the process digital model of the composite material product part. The interval dimension of the first plate slot hole (1-2-3) is 200 - 300 mm, and the interval dimension and quantity are determined by the size of the composite material product part.

[0042] Figure 6 It is a schematic structural diagram of the first intermediate cross-shaped plate one (1-2) of the present invention. The first intermediate cross-shaped plate one (1-2), the first intermediate cross-shaped plate two (1-3), the first intermediate cross-shaped plate three (1-4), the first intermediate cross-shaped plate four (1-5), and the first intermediate cross-shaped plate five (1-6) adopt the same structure. Taking the first intermediate cross-shaped plate one (1-2) as an example to illustrate the structural composition of these five cross-shaped plates, the first intermediate cross-shaped plate one (1-2) is composed of a second base body (1-3-1), a second profile surface (1-3-2), a first plate slot (1-3-3), and a first plate buckle (1-3-4). The outer shape of the second base body (1-3-1) is processed by a wire cutting device. The digital model of the second profile surface (1-3-2) is consistent with the process digital model of the composite material product part. The interval dimension of the first plate slot (1-3-3) is 80 - 120 mm, and the interval dimension and quantity are consistent with those of the first plate slot hole (1-2-3) of the first front cross-shaped plate (1-1).

[0043] Figure 7 It is a schematic structural diagram of the first front longitudinal plate (1-8) of the present invention. The first front longitudinal plate (1-8) and the first rear longitudinal plate (1-13) adopt the same structure. Taking the first front longitudinal plate (1-8) as an example to illustrate the structural composition of these two longitudinal plates, the first front longitudinal plate (1-8) is composed of a third base body (1-8-1), a third profile surface (1-8-2), and a second plate slot hole (1-8-3). The outer shape of the third base body (1-8-1) is processed by a wire cutting device. The digital model of the third profile surface (1-8-2) is consistent with the process digital model of the composite material product part. The interval dimension of the second plate slot hole (1-8-3) is 200 - 300 mm, and the interval dimension and quantity are determined by the size of the composite material product part.

[0044] Figure 8It is a schematic structural diagram of the first section of the intermediate longitudinal plate (1-9) of the present invention. The first section of the intermediate longitudinal plate (1-9) is composed of a fourth base body (1-9-1), a fourth profiled surface (1-9-2), and a second profiled plate slot (1-9-3). The outer shape of the fourth base body (1-9-1) is processed by a wire cutting device. The digital model of the fourth profiled surface (1-9-2) is consistent with the process digital model of the composite material product part. The interval dimension of the second profiled plate slot (1-9-3) is 200 - 300 mm, and the interval dimension and quantity are consistent with the second profiled plate card slot hole (1-8-3) of the first section of the front longitudinal plate (1-8).

[0045] Figure 9 It is a schematic structural diagram of the second section of the intermediate longitudinal plate (1-10) of the present invention. The second section of the intermediate longitudinal plate (1-10), the third section of the intermediate longitudinal plate (1-11), and the fourth section of the intermediate longitudinal plate (1-12) adopt the same structure. Taking the second section of the intermediate longitudinal plate (1-10) as an example to illustrate the structural composition of these three longitudinal plates. The second section of the intermediate longitudinal plate (1-10) is composed of a fifth base body (1-10-1), a fifth profiled surface (1-10-2), a third profiled plate slot (1-10-3), and a second profiled plate buckle (1-10-4). The outer shape of the fifth base body (1-10-1) is processed by a wire cutting device. The digital model of the fifth profiled surface (1-10-2) is consistent with the process digital model of the composite material product part. The interval dimension of the third profiled plate slot (1-10-3) is 80 - 120 mm, and the interval dimension and quantity are consistent with the second profiled plate card slot hole (1-8-3) of the first section of the front longitudinal plate (1-8).

[0046] Figure 10 It is a schematic diagram of the hot pressing method of the first section of the convex profiled plate (1-14) of the present invention. The first section of the convex profiled plate (1-14) is made of a common steel plate with a thickness of 8 - 10 mm, and is roll-pressed and roughly processed on a roll press bed according to the process digital model of the composite material part and is hot-pressed and finely processed on a grid frame structure. The digital model of the first section of the convex profiled plate (1-14) is consistent with the digital model of the composite material part.

[0047] The hot pressing forming process method for a large-sized profiled plate frame combined convex die for composite materials is as follows:

[0048] (1) According to the three-dimensional digital model of the composite material part, as well as the working conditions of thermal curing forming and the finite element force analysis, etc., a three-dimensional process digital model with a thickness of 10 mm is constructed as the digital model of the profiled plate of the convex die and the concave die of the hot pressing mold.

[0049] (2)According to the requirements of general rolling machines, the size of parts cannot exceed 1000×800mm. If the composite material parts exceed 1000×800mm, it means that the die plates of the hot pressing die cannot be rolled in one pass. Therefore, according to the situation of the composite material parts, the digital models of the die plates of the male and female dies of the hot pressing die are evenly segmented. Taking the composite material parts with a size of 6000×800mm and divided into 6 segments of male hot pressing dies as an example, the digital models of the die plates of the first-stage male hot pressing die (1), the second-stage male hot pressing die (2), the third-stage male hot pressing die (3), the fourth-stage male hot pressing die (4), the fifth-stage male hot pressing die (5), and the sixth-stage male hot pressing die (6) are established.

[0050] (3)Establish the digital models of each segment of male and female hot pressing dies. Taking the first-stage male hot pressing die (1) as an example to illustrate the digital models of each segment of male and female hot pressing dies, the first-stage male hot pressing die (1) is composed of the first-stage male die plate (1-14), the first-stage front horizontal plate (1-1), the first-stage intermediate horizontal plate one (1-2), the first-stage intermediate horizontal plate two (1-3), the first-stage intermediate horizontal plate three (1-4), the first-stage intermediate horizontal plate four (1-5), the first-stage intermediate horizontal plate five (1-6), the first-stage rear horizontal plate (1-7), the first-stage front vertical plate (1-8), the first-stage intermediate vertical plate one (1-9), the first-stage intermediate vertical plate two (1-10), the first-stage intermediate vertical plate three (1-11), the first-stage intermediate vertical plate four (1-12), and the first-stage rear vertical plate (1-13); the first-stage female hot pressing die (7) has the same composition.

[0051] (4)Rough-machine the segmented male die plates. Taking the rolling of the first-stage male die plate (1-14) and the first-stage female hot pressing die plate (7-1) as an example, prepare steel plates with a thickness of 10mm. The method of rolling 2 first-stage male die plates (1-14) at one time on the rolling machine and separating them after calibration can be adopted, leaving a machining error amount and a welding adjustment allowance as the first-stage male die plate (1-14) and the first-stage female hot pressing die plate (7-1).

[0052] (5)Machine the horizontal and vertical plates of the first-stage male hot pressing die (1) and the first-stage female hot pressing die (7). Prepare steel plates with a thickness of 8mm. Taking the horizontal and vertical plates of the first-stage male hot pressing die (1) as an example to illustrate the machining method of the horizontal and vertical plates, the digital models of the first-stage front horizontal plate (1-1), the first-stage intermediate horizontal plate one (1-2), the first-stage intermediate horizontal plate two (1-3), the first-stage intermediate horizontal plate three (1-4), the first-stage intermediate horizontal plate four (1-5), the first-stage intermediate horizontal plate five (1-6), the first-stage rear horizontal plate (1-7), the first-stage front vertical plate (1-8), the first-stage intermediate vertical plate one (1-9), the first-stage intermediate vertical plate two (1-10), the first-stage intermediate vertical plate three (1-11), the first-stage intermediate vertical plate four (1-12), and the first-stage rear vertical plate (1-13) are machined on a wire cutting machine.

[0053] Weld the grid-frame support body of a section of hot-pressing punch (1) and a section of hot-pressing die (7). Taking the horizontal plate and vertical plate of a section of hot-pressing punch (1) as an example, the welding process of the grid-frame support body of a section of hot-pressing punch (1) and a section of hot-pressing die (7) is described. The 13 types of plates, namely a section of front horizontal plate (1-1), a section of middle horizontal plate 1 (1-2), a section of middle horizontal plate 2 (1-3), a section of middle horizontal plate 3 (1-4), a section of middle horizontal plate 4 (1-5), a section of middle horizontal plate 5 (1-6), a section of rear horizontal plate (1-7), a section of front vertical plate (1-8), a section of middle vertical plate 1 (1-9), a section of middle vertical plate 2 (1-10), a section of middle vertical plate 3 (1-11), a section of middle vertical plate 4 (1-12), and a section of rear vertical plate (1-13), which are processed qualified in step (5), are combined together by snap-fastener and slot connection and then welded to form the grid-frame support body of a section of hot-pressing punch (1). Its main function is to provide sufficient support for a section of punch model panel (1-14), which can not only ensure strength but also reduce weight, save costs and quickly heat the back of the mold.

[0054] (7) Finish-machine the segmented punch model panels of the mold. Taking the finish-machining of a section of punch model panel (1-14) and a section of hot-pressing die model panel (7-1) as an example; put the a section of punch model panel (1-14) or a section of hot-pressing die model panel (7-1) rough-machined in step (4) into a heating furnace, heat it within the temperature range of 750-800 °C, take it out and place it on the grid-frame support body of a section of hot-pressing punch (1), clamp a section of hot-pressing die (7) with a punching fixture to carry out punching forming, wait for cooling and then take it out. After taking it out, preliminarily detect whether it conforms to the surface of a section of punch model panel (1-14) and a section of hot-pressing die model panel (7-1). If it is qualified, proceed to the finish-machining of the next model panel.

[0055] (8) Weld the second-section hot-pressing punch (2), third-section hot-pressing punch (3), fourth-section hot-pressing punch (4), fifth-section hot-pressing punch (5), and sixth-section hot-pressing punch (6) by the same processes as in step (3), step (4), step (5), step (6), and step (7).

[0056] (9) For the hot-pressing forming large template frame combined punch for welding composite materials, for the grid frame supports of the first-stage hot-pressing punch (1), second-stage hot-pressing punch (2), third-stage hot-pressing punch (3), fourth-stage hot-pressing punch (4), fifth-stage hot-pressing punch (5), and sixth-stage hot-pressing punch (6) that are welded in step (6), that is, the frame supports of each segmented hot-pressing punch of the hot-pressing forming segmented punch template, rigidly connect the overall grid frame support through screws and positioning pins. Then, based on this overall grid frame support, trim the excess of the six segmented punch templates, namely the first-stage punch template (1-14), second-stage punch template (2-1), third-stage punch template (3-1), fourth-stage punch template (4-1), fifth-stage punch template (5-1), and sixth-stage punch template (6-1), remove the machining error amount, welding adjustment allowance, and secondary shaping. After passing the inspection, complete the welding of the hot-pressing forming large template frame combined punch for composite materials.

Claims

1. A process method for a large-sized plate frame combined punch for hot pressing of composite materials. The large-sized plate frame combined punch for hot pressing of composite materials is composed of segmented hot pressing punches, screws and positioning pins. The number of segmented hot pressing punches is determined according to the size of the composite material part, and the size of the segmented hot pressing punch shall not exceed 1000×800mm. It is characterized in that: Taking the composition of 6 segmented hot pressing punches as an example to illustrate the structural composition of the large-sized plate frame combined punch for hot pressing of composite materials. The hot pressing combined punch is composed of a first-stage hot pressing punch (1), a second-stage hot pressing punch (2), a third-stage hot pressing punch (3), a fourth-stage hot pressing punch (4), a fifth-stage hot pressing punch (5), a sixth-stage hot pressing punch (6), screws and positioning pins, and are rigidly connected by welding to each other. The first-stage hot pressing punch (1) and the second-stage hot pressing punch (2), the third-stage hot pressing punch (3) and the fourth-stage hot pressing punch (4), the fifth-stage hot pressing punch (5) and the sixth-stage hot pressing punch (6) are all rigidly connected by screws and positioning pins. The third-stage hot pressing punch (3) is respectively rigidly connected to the first-stage hot pressing punch (1) and the fifth-stage hot pressing punch (5) by screws and positioning pins. The fourth-stage hot pressing punch (4) is respectively rigidly connected to the second-stage hot pressing punch (2) and the sixth-stage hot pressing punch (6) by screws and positioning pins; the first-stage hot pressing punch (1), the second-stage hot pressing punch (2), the third-stage hot pressing punch (3), the fourth-stage hot pressing punch (4), the fifth-stage hot pressing punch (5), the sixth-stage hot pressing punch (6) are collectively referred to as segmented hot pressing punches; A process method for a large-sized plate frame combined punch for hot pressing of composite materials specifically includes the following process steps: (1) According to the three-dimensional digital model of the composite material part, and the working conditions of hot curing forming and the finite element stress analysis, construct a three-dimensional process digital model with a thickness of 10mm as the panel digital model of the punch and die of the hot pressing die. (2) According to the requirements of general rolling machine tools for the part size not exceeding 1000×800mm, if the composite material part exceeds 1000×800mm, it means that the panel of the hot pressing die cannot be rolled in one time. Therefore, according to the situation of the composite material part, the panel digital models of the punch and die of the hot pressing die are evenly segmented into segmented hot pressing punches and segmented hot pressing dies. Taking the composite material part with a size of 6000×800mm divided into 6 segmented hot pressing punches as an example, establish the panel digital models of the first-stage hot pressing punch (1), the second-stage hot pressing punch (2), the third-stage hot pressing punch (3), the fourth-stage hot pressing punch (4), the fifth-stage hot pressing punch (5), the sixth-stage hot pressing punch (6). (3) Establish the digital models of each section of the hot pressing punch and die. Taking the first-section hot pressing punch (1) as an example to illustrate the digital models of each section of the hot pressing punch and die, the first-section hot pressing punch (1) is composed of a first-section punch model panel (1-14), a first-section front transverse plate (1-1), a first-section middle transverse plate one (1-2), a first-section middle transverse plate two (1-3), a first-section middle transverse plate three (1-4), a first-section middle transverse plate four (1-5), a first-section middle transverse plate five (1-6), a first-section rear transverse plate (1-7), a first-section front longitudinal plate (1-8), a first-section middle longitudinal plate one (1-9), a first-section middle longitudinal plate two (1-10), a first-section middle longitudinal plate three (1-11), a first-section middle longitudinal plate four (1-12), and a first-section rear longitudinal plate (1-13); the first-section hot pressing die (7) has the same composition. (4) Rough machine the segmented punch model panels. Taking the rolling of a first-section punch model panel (1-14) and a first-section hot pressing die model panel (7-1) as an example, prepare steel plates with a thickness of 10 mm, and use the method of rolling 2 first-section punch model panels (1-14) at a time on a rolling machine tool and separating them after calibration, leaving a machining error amount and a welding adjustment allowance as the first-section punch model panel (1-14) and the first-section hot pressing die model panel (7-1). (5) Machine the transverse and longitudinal plates of the first-section hot pressing punch (1) and the first-section hot pressing die (7). Prepare steel plates with a thickness of 8 mm. Taking the transverse and longitudinal plates of the first-section hot pressing punch (1) as an example to illustrate the machining method of the transverse and longitudinal plates, machine the digital models of the first-section front transverse plate (1-1), the first-section middle transverse plate one (1-2), the first-section middle transverse plate two (1-3), the first-section middle transverse plate three (1-4), the first-section middle transverse plate four (1-5), the first-section middle transverse plate five (1-6), the first-section rear transverse plate (1-7), the first-section front longitudinal plate (1-8), the first-section middle longitudinal plate one (1-9), the first-section middle longitudinal plate two (1-10), the first-section middle longitudinal plate three (1-11), the first-section middle longitudinal plate four (1-12), and the first-section rear longitudinal plate (1-13) on a wire cutting machine tool. (6) Assemble and weld the grid-frame support for a section of hot-pressing punch (1) and a section of hot-pressing die (7). Taking the transverse plate and longitudinal plate of a section of hot-pressing punch (1) as an example, the assembly and welding process of the grid-frame support for a section of hot-pressing punch (1) and a section of hot-pressing die (7) is described. The 13 types of plates, namely a section of front transverse plate (1-1), a section of middle transverse plate 1 (1-2), a section of middle transverse plate 2 (1-3), a section of middle transverse plate 3 (1-4), a section of middle transverse plate 4 (1-5), a section of middle transverse plate 5 (1-6), a section of rear transverse plate (1-7), a section of front longitudinal plate (1-8), a section of middle longitudinal plate 1 (1-9), a section of middle longitudinal plate 2 (1-10), a section of middle longitudinal plate 3 (1-11), a section of middle longitudinal plate 4 (1-12), and a section of rear longitudinal plate (1-13), which are processed qualified in step (5), are combined together by snap-fastener and slot, and slot insertion and then welded to form the grid-frame support of a section of hot-pressing punch (1). Its main function is to provide sufficient support for a section of punch model panel (1-14), which can not only ensure strength but also reduce weight, save cost and quickly heat the back of the mold. (7) Finish-machine each section of punch model panel of the mold. Taking the finish-machining of a section of punch model panel (1-14) and a section of hot-pressing die model panel (7-1) as an example; put a section of punch model panel (1-14) or a section of hot-pressing die model panel (7-1) rough-machined in step (4) into a heating furnace, heat it within the temperature range of 750 - 800 °C, take it out and place it on the grid-frame support of a section of hot-pressing punch (1), clamp a section of hot-pressing die (7) with a punching fixture for stamping forming, wait for it to cool and then take it out. After taking it out, preliminarily detect whether it conforms to the surface of a section of punch model panel (1-14) and a section of hot-pressing die model panel (7-1). If it is qualified, proceed to the finish-machining of the next model panel. (8) The assembly and welding of the second section of hot-pressing punch (2), the third section of hot-pressing punch (3), the fourth section of hot-pressing punch (4), the fifth section of hot-pressing punch (5), and the sixth section of hot-pressing punch (6) are manufactured by the same processes as in step (3), step (4), step (5), step (6), and step (7). (9) For the hot press forming large template frame combined punch for welding composite materials, for the grid frame supports of the first-stage hot press punch (1), second-stage hot press punch (2), third-stage hot press punch (3), fourth-stage hot press punch (4), fifth-stage hot press punch (5), and sixth-stage hot press punch (6) welded in step (6), that is, the frame supports of each segmented hot press punch for the hot press forming segmented convex model panel, rigidly connect the integral grid frame support through screws and positioning pins. Then, taking this integral grid frame support as the reference, cut the excess of the six segmented convex model panels, namely the first-stage convex model panel (1-14), second-stage convex model panel (2-1), third-stage convex model panel (3-1), fourth-stage convex model panel (4-1), fifth-stage convex model panel (5-1), and sixth-stage convex model panel (6-1), remove the machining error amount, welding adjustment allowance, and secondary rework. After passing the inspection, complete the welding of the hot press forming large template frame combined punch for composite materials.

2. The process method of the hot press forming large template frame combined punch for composite materials according to claim 1, characterized in that: The first-stage hot press punch (1), second-stage hot press punch (2), third-stage hot press punch (3), fourth-stage hot press punch (4), fifth-stage hot press punch (5), and sixth-stage hot press punch (6) are composed of the same structure, and are all composed of segmented convex model panels and template plates. The first-stage convex model panel (1-14), second-stage convex model panel (2-1), third-stage convex model panel (3-1), fourth-stage convex model panel (4-1), fifth-stage convex model panel (5-1), and sixth-stage convex model panel (6-1) are collectively referred to as segmented convex model panels. The segmented convex model panels are all made of ordinary steel plates with a thickness of 8-10 mm, and are roll-formed by rough machining on a composite material part process digital control roller press and finish-formed by hot pressing with a grid frame structure support of the segmented hot press punch. The digital model of the segmented convex model panel is consistent with the digital model of the composite material part; Taking a single-section hot pressing punch (1) as an example to illustrate the structural composition of these six single-section hot pressing punches. The single-section hot pressing punch (1) is composed of a single-section punch model panel (1-14), a single-section front transverse plate (1-1), a single-section middle transverse plate one (1-2), a single-section middle transverse plate two (1-3), a single-section middle transverse plate three (1-4), a single-section middle transverse plate four (1-5), a single-section middle transverse plate five (1-6), a single-section rear transverse plate (1-7), a single-section front longitudinal plate (1-8), a single-section middle longitudinal plate one (1-9), a single-section middle longitudinal plate two (1-10), a single-section middle longitudinal plate three (1-11), a single-section middle longitudinal plate four (1-12), and a single-section rear longitudinal plate (1-13). The single-section punch model panel (1-14) is rigidly connected to 12 plates by welding. The 12 plates include a single-section front transverse plate (1-1), a single-section middle transverse plate one (1-2), a single-section middle transverse plate two (1-3), a single-section middle transverse plate three (1-4), a single-section middle transverse plate four (1-5), a single-section middle transverse plate five (1-6), a single-section rear transverse plate (1-7), a single-section front longitudinal plate (1-8), a single-section middle longitudinal plate one (1-9), a single-section middle longitudinal plate two (1-10), a single-section middle longitudinal plate three (1-11), a single-section middle longitudinal plate four (1-12), and a single-section rear longitudinal plate (1-13). The 12 plates are all made of ordinary steel plates with a thickness of 7-8 mm. The 12 plates are rigidly connected to each other by slot insertion, snap fasteners and card slots to form a grid-type frame structure support body of the single-section hot pressing punch (1). The grid interval size is 200-300 mm, and the grid interval size and quantity are determined by the size of the composite material product parts.

3. According to the process method of the large-sized plate frame combined punch for hot pressing of composite materials described in claim 2, It is characterized in that: The said first-section front horizontal plate (1-1), first-section rear horizontal plate (1-7), first-section front longitudinal plate (1-8), and first-section rear longitudinal plate (1-13) are rigidly connected by welding. The first-section front horizontal plate (1-1) and first-section rear horizontal plate (1-7) are respectively rigidly connected to the second first-section intermediate longitudinal plate (1-10), third first-section intermediate longitudinal plate (1-11), and fourth first-section intermediate longitudinal plate (1-12) by the first template slot hole (1-2-3) and the second template buckle (1-10-4). The spacing dimension is 200 - 300 mm, and the spacing dimension and quantity are determined by the dimensions of the composite material product parts. The first-section front longitudinal plate (1-8) and first-section rear longitudinal plate (1-13) are respectively rigidly connected to the first first-section intermediate horizontal plate (1-2), second first-section intermediate horizontal plate (1-3), third first-section intermediate horizontal plate (1-4), fourth first-section intermediate horizontal plate (1-5), and fifth first-section intermediate horizontal plate (1-6) by the second template slot hole (1-8-3) and the first template buckle (1-3-4). The spacing dimension is 200 - 300 mm, and the spacing dimension and quantity are determined by the dimensions of the composite material product parts. The first first-section intermediate longitudinal plate (1-9) is connected to the first first-section intermediate horizontal plate (1-2), second first-section intermediate horizontal plate (1-3), third first-section intermediate horizontal plate (1-4), fourth first-section intermediate horizontal plate (1-5), and fifth first-section intermediate horizontal plate (1-6) by inserting and connecting with the second template slot (1-9-3) and the first template slot (1-3-3). The insertion and assembly gap is 0.8 - 1.8 mm. The second first-section intermediate longitudinal plate (1-10), third first-section intermediate longitudinal plate (1-11), and fourth first-section intermediate longitudinal plate (1-12) are respectively connected to the first first-section intermediate horizontal plate (1-2), second first-section intermediate horizontal plate (1-3), third first-section intermediate horizontal plate (1-4), fourth first-section intermediate horizontal plate (1-5), and fifth first-section intermediate horizontal plate (1-6) by inserting and connecting with the third template slot (1-10-3). The insertion and assembly gap is 0.8 - 1.8 mm.

4. The process method of the large-sized hot pressing forming template frame combined punch for composite materials according to claim 2 or 3, characterized in that: The said first-stage front cross-shaped plate (1-1) and the first-stage rear cross-shaped plate (1-7) have the same structure. Taking the first-stage front cross-shaped plate (1-1) as an example to illustrate the structural composition of these two cross-shaped plates, the first-stage front cross-shaped plate (1-1) consists of a first substrate (1-2-1), a first profile surface (1-2-2), and a first plate slot hole (1-2-3). The outer shape of the first substrate (1-2-1) is processed by a wire cutting device. The digital model of the profile surface (1-1-2) is consistent with the process digital model of the composite material product part. The interval dimension of the first plate slot hole (1-2-3) is 200 - 300 mm, and the interval dimension and quantity are determined by the size of the composite material product part. The said first-stage intermediate cross-shaped plate one (1-2), first-stage intermediate cross-shaped plate two (1-3), first-stage intermediate cross-shaped plate three (1-4), first-stage intermediate cross-shaped plate four (1-5), and first-stage intermediate cross-shaped plate five (1-6) have the same structure. Taking the first-stage intermediate cross-shaped plate one (1-2) as an example to illustrate the structural composition of these five cross-shaped plates, the first-stage intermediate cross-shaped plate one (1-2) consists of a second substrate (1-3-1), a second profile surface (1-3-2), a first plate slot (1-3-3), and a first plate buckle (1-3-4). The outer shape of the second substrate (1-3-1) is processed by a wire cutting device. The digital model of the second profile surface (1-3-2) is consistent with the process digital model of the composite material product part. The interval dimension of the first plate slot (1-3-3) is 80 - 120 mm, and the interval dimension and quantity are the same as those of the first plate slot hole (1-2-3) of the first-stage front cross-shaped plate (1-1). The said first-stage front longitudinal plate (1-8) and the first-stage rear longitudinal plate (1-13) have the same structure. Taking the first-stage front longitudinal plate (1-8) as an example to illustrate the structural composition of these two longitudinal plates, the first-stage front longitudinal plate (1-8) consists of a third substrate (1-8-1), a third profile surface (1-8-2), and a second plate slot hole (1-8-3). The outer shape of the third substrate (1-8-1) is processed by a wire cutting device. The digital model of the third profile surface (1-8-2) is consistent with the process digital model of the composite material product part. The interval dimension of the second plate slot hole (1-8-3) is 200 - 300 mm, and the interval dimension and quantity are determined by the size of the composite material product part. The said first-stage intermediate longitudinal plate one (1-9) consists of a fourth substrate (1-9-1), a fourth profile surface (1-9-2), a second plate slot (1-9-3), and a first plate connection hole (1-9-4). The outer shape of the fourth substrate (1-9-1) is processed by a wire cutting device. The digital model of the fourth profile surface (1-9-2) is consistent with the process digital model of the composite material product part. The interval dimension of the second plate slot (1-9-3) is 200 - 300 mm, and the interval dimension and quantity are the same as those of the second plate slot hole (1-8-3) of the first-stage front longitudinal plate (1-8).The first intermediate longitudinal plate two (1-10), the first intermediate longitudinal plate three (1-11), and the first intermediate longitudinal plate four (1-12) adopt the same structure. Taking the first intermediate longitudinal plate two (1-10) as an example to illustrate the structural composition of these three longitudinal plates, the first intermediate longitudinal plate two (1-10) is composed of a matrix five (1-10-1), a profile five (1-10-2), a template slot three (1-10-3), and a template buckle two (1-10-4). The outer shape of the matrix five (1-10-1) is processed by a wire cutting device. The digital model of the profile five (1-10-2) is consistent with the process digital model of the composite material product part. The interval dimension of the template slot three (1-10-3) is 80 - 120 mm, and the interval dimension and quantity are consistent with those of the template slot hole two (1-8-3) of the first front longitudinal plate (1-8).;

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