Composite material launching box forming die

Abstract

The utility model relates to a composite material launch box forming die, which belongs to the technical field of composite material forming, and comprises a cylinder body, a through shaft, a clamping shaft head, a jacking shaft head and a positioning rib plate, the cylinder body is supported by the positioning rib plate and a hard foaming filler, and the hard foaming filler is lower in density, so that not only is the overall weight of the forming die reduced, but also the forming cost is reduced. The rigidity and the precision of the forming die are effectively improved, and the deflection deformation of the forming die is reduced. And meanwhile, the clamping shaft head and the jacking shaft head are connected through the through shaft so as to be connected with a machining machine tool, and through constraint of the through shaft, when the forming die is assembled and formed, welding deformation of the cylinder is effectively reduced, the overall precision of the forming die is improved, and the quality of the forming face of the square launching box is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of composite material molding, and in particular relates to a composite material launch box molding die. Background Art

[0002] Square launch boxes are widely used due to their high space utilization rate. The launch system using square launch boxes also has the advantages of high reliability and low cost. The performance of square launch boxes can be effectively improved by taking advantage of the high specific strength, high specific modulus, and good structural designability of composite materials. The molding of square launch boxes made of composite materials requires a rectangular tubular mold. During the molding process, the square tubular mold needs to rotate at high speed, so it must have high rigidity and light weight. At the same time, it also needs to have high overall precision to ensure the quality of the molding surface of the square launch box. Therefore, it is necessary to design a composite material launch box molding mold with the above advantages. Utility Model Content

[0003] In order to solve the above problems existing in the prior art, the present invention provides a composite material launch box forming die. The technical problem to be solved by the present invention is achieved through the following technical solutions:

[0004] The utility model provides a composite material launch box forming mold, comprising: a cylinder, which is a rectangular tube, with a tube cavity provided inside, the tube cavity is evenly filled with hard foam filler, and the outside of the cylinder is a forming surface; a through shaft, which is a hollow shaft, and the through shaft is arranged in the tube cavity; a clamping shaft head, the fixed end of the clamping shaft head is coaxially connected to the first end of the through shaft, the clamping end of the clamping shaft head is located outside the tube cavity, and the clamping end is provided with a transmission key groove; a tightening shaft head, the fixed end of the tightening shaft head is coaxially connected to the second end of the through shaft, the tightening end of the tightening shaft head is located outside the tube cavity, and the tightening end is provided with a top hole; a positioning rib plate, which is provided in the tube cavity and fixedly connected to the inner wall of the cylinder; a plurality of positioning rib plates are respectively sleeved on the through shaft, the fixed end of the clamping shaft head and the fixed end of the tightening shaft head; each positioning rib plate is provided with a breathable through hole.

[0005] In one embodiment of the present invention, the barrel includes four mold panels, which are fixedly connected in sequence to form a rectangular tube.

[0006] In one embodiment of the present invention, a plurality of first positioning pin holes are provided at the first end of the through shaft, and the plurality of first positioning pin holes are staggered with each other, and a plurality of cylindrical pins pass through the plurality of first positioning pin holes one by one and are connected to the clamping shaft head.

[0007] In one embodiment of the present invention, a plurality of second positioning pin holes are provided at the second end of the through shaft, and the plurality of second positioning pin holes are staggered with each other, and a plurality of cylindrical pins pass through the plurality of second positioning pin holes one by one and are connected to the tightening shaft head.

[0008] In one embodiment of the present invention, a transmission keyway is radially arranged on the end face of the clamping end of the clamping shaft head for connecting to a chuck of a processing machine tool; wherein the width of the transmission keyway ranges from 20 to 80 mm, and the depth ranges from 10 to 40 mm.

[0009] In one embodiment of the present invention, the center hole is provided on the end surface of the tightening end of the tightening shaft head for connecting to the center of the processing machine tool.

[0010] In one embodiment of the present invention, two positioning ribs are respectively provided at both ends of the cylinder, and are respectively fixedly connected to the inner wall of the cylinder and the through shaft.

[0011] In one embodiment of the present invention, a plurality of reinforcing ribs are respectively connected between the fixed end of the clamping shaft head and the fixed end of the pressing shaft head and the corresponding positioning rib plates.

[0012] In one embodiment of the present invention, the composite material launch box forming mold also includes: support ribs, a plurality of support ribs are arranged at intervals in the tube cavity, and are respectively fixedly connected to the inner wall of the cylinder and the through shaft; each support rib is provided with a breathable through hole, and the connection position between each support rib and the inner wall of the cylinder is provided with a welding chamfer.

[0013] In one embodiment of the present invention, the composite launch box forming mold also includes: axial ribs, several axial ribs are arranged along the axial direction of the through shaft, and each axial rib is respectively connected to the supporting ribs on both sides, the outer wall of the through shaft and the cylinder.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The composite launch box forming mold of this utility model supports the cylinder body through positioning ribs and rigid foam filler. Due to the low density of the rigid foam filler, the overall weight of the forming mold is reduced, the rigidity and precision of the forming mold are effectively improved, and the deflection deformation of the forming mold is reduced. At the same time, the clamping and tightening shaft heads are connected to the processing machine tool through the through-shaft. The constraint of the through-shaft also effectively reduces the welding deformation of the cylinder body during the assembly and molding of the forming mold, improves the overall precision of the forming mold, and ensures the quality of the forming surface of the square launch box.

[0016] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In addition, in order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a structural diagram of a composite material launch box forming mold provided by an embodiment of the present utility model;

[0018] Figure 2 This is a structural cross-sectional view of a composite material launch box forming mold provided by an embodiment of the present utility model;

[0019] Figure 3 This is a structural side view of a composite material launch box forming mold provided by an embodiment of the present utility model;

[0020] Figure 4 This is a schematic structural diagram of the clamping shaft head provided by an embodiment of the present utility model;

[0021] Figure 5 This is a schematic structural diagram of a tightening shaft head provided by an embodiment of the present utility model;

[0022] Figure 6 This is a structural diagram of a positioning rib provided by an embodiment of the present utility model;

[0023] Figure 7 This is a schematic structural diagram of the support rib provided by an embodiment of the present utility model;

[0024] Figure 8 This is an embodiment of the utility model Figure 2 A-direction sectional view.

[0025] Icon: 100-cylinder; 200-through shaft; 300-clamping shaft head; 400-tightening shaft head; 500-positioning rib; 600-supporting rib; 700-reinforcement rib; 800-axial rib. DETAILED DESCRIPTION

[0026] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the following is a detailed description of a composite material launch box forming mold proposed according to the present invention in combination with the accompanying drawings and specific implementation methods.

[0027] The aforementioned and other technical contents, features, and effects of the present invention are clearly presented in the following detailed description of the specific embodiments in conjunction with the accompanying drawings. Through the description of the specific embodiments, a more in-depth and specific understanding of the technical means and effects adopted by the present invention to achieve the intended purpose can be obtained. However, the accompanying drawings are for reference and illustration purposes only and are not intended to limit the technical solutions of the present invention.

[0028] Example 1

[0029] During the molding process of a square launch box made of composite materials, high-speed rotation is usually required to achieve winding molding of the composite materials. During high-speed rotation (500r / min and above), unbalanced rotational inertia will affect the molding surface quality of the square launch box. Therefore, the weight of the molding mold needs to be light and the mass distribution needs to be uniform. At the same time, it is also necessary to ensure high rigidity to reduce the deflection deformation of the molding mold.

[0030] In view of this, the utility model provides a composite material launch box forming die, such as Figure 1 and Figure 2 As shown, the forming mold includes: a cylinder 100, a through shaft 200, a clamping shaft head 300, a top shaft head 400 and a positioning rib 500, wherein the cylinder 100 is a rectangular tube with a tube cavity provided inside, the tube cavity is uniformly filled with hard foam filler, and the outside of the cylinder 100 is a forming surface; the through shaft 200 is a hollow shaft, and the through shaft 200 is arranged in the tube cavity; the clamping shaft head 300, the fixed end of the clamping shaft head 300 is coaxially connected to the first end of the through shaft 200, and the clamping The clamping end of the shaft head 300 is located outside the tube cavity; the tightening shaft head 400, the fixed end of the tightening shaft head 400 is coaxially connected to the second end of the through shaft 200, and the tightening end of the tightening shaft head 400 is located outside the tube cavity; the positioning rib 500 is arranged in the tube cavity and fixedly connected to the inner wall of the cylinder 100; several positioning ribs 500 are respectively sleeved on the through shaft 200, the fixed end of the clamping shaft head 300 and the fixed end of the tightening shaft head 400; each positioning rib 500 is provided with a breathable through hole.

[0031] In an optional embodiment, if Figure 1 and Figure 2 As shown, the cylinder 100 includes four mold panels, which are fixedly connected in sequence to form a rectangular tube. For example, the mold panels are alloy steel plates with a thickness ranging from 20 to 50 mm. The four mold panels are welded to form a square tube.

[0032] In an optional embodiment, if Figure 2 and Figure 4 As shown, the first end of the through shaft 200 is provided with a plurality of first positioning pin holes, which are staggered with each other, and a plurality of cylindrical pins pass through the plurality of first positioning pin holes and are connected to the clamping shaft head 300. For example, the diameter of the cylindrical pins can range from 20 to 80 mm.

[0033] Exemplarily, the through-shaft 200 is a hollow steel tube with a wall thickness ranging from 20 mm to 50 mm. It is made of alloy steel and has been subjected to a quenching and tempering treatment to ensure overall strength. Generally, the quenching and tempering treatment may have a Rockwell hardness range of 28 to 32. Furthermore, to ensure the structural strength of the through-shaft 200, an integrally formed through-shaft 200 is employed. During the welding and assembly of the through-shaft 200 and the cylindrical body 100, the restraint of the integrally formed through-shaft 200 reduces welding deformation of the cylindrical body 100, thereby preventing deformation of the cylindrical body 100 due to thermal stress.

[0034] Furthermore, the clamping end of the clamping spindle head 300 is provided with a transmission keyway. The transmission keyway is radially arranged on the end surface of the clamping end of the clamping spindle head 300 and is used to connect to the chuck of the processing machine tool. The transmission keyway cooperates with the key to achieve torque transmission between the processing machine tool and the forming mold. For example, the transmission keyway has a width ranging from 20 to 80 mm and a depth ranging from 10 to 40 mm.

[0035] In an optional embodiment, if Figure 2 and Figure 5 As shown, the second end of the through shaft 200 is provided with a plurality of second positioning pin holes, which are staggered with each other, and a plurality of cylindrical pins pass through the plurality of second positioning pin holes and are connected to the top shaft head 400. For example, the diameter of the cylindrical pins can range from 20 to 80 mm.

[0036] Furthermore, a center hole is provided at the tightening end of the tightening shaft head 400 . The center hole is provided on the end surface of the tightening end of the tightening shaft head 400 and is used for connecting to the center of a processing machine tool.

[0037] In an optional embodiment, if Figure 2 and Figure 6 As shown, two positioning ribs 500 are respectively provided at both ends of the cylinder 100 and are respectively fixedly connected to the inner wall of the cylinder 100 and the through shaft 200 .

[0038] Further, such as Figure 2 and Figure 3 As shown, a plurality of reinforcing ribs 700 are respectively connected between the fixed end of the clamping shaft head 300 and the fixed end of the top shaft head 400 and the corresponding positioning rib plate 500, wherein the plurality of reinforcing ribs 700 are evenly arranged along the circumferential direction, and the clamping shaft head 300 and the top shaft head 400 are both connected to the reinforcing ribs 700 by welding, and are also connected to the positioning rib plate 500 by welding through the reinforcing ribs 700.

[0039] For example, four positioning ribs 500 are provided, two of which are connected to the ends of the cylinder 100, and the other two positioning ribs 500 are mounted on the through-shaft 200 and connected to the cylinder 100 by welding. The positioning ribs 500 help to ensure the positional relationship between the four mold panels. During the assembly process, the positioning ribs 500 have a hole in the middle, are mounted on the through-shaft 200, and assembled into place. The positioning ribs 500 and the through-shaft 200 are then connected to the cylinder 100, thereby ensuring the consistency of the entire molding mold and improving the overall precision. Similarly, the clamping shaft head 300 and the clamping shaft head 400 are connected and positioned with the through shaft 200 by cylindrical pins, and finally the positioning rib 500 is connected to the inner wall of the cylinder 100 by welding, thereby connecting the cylinder 100, the through shaft 200, the clamping shaft head 300 and the clamping shaft head 400 into one, ensuring the positioning accuracy of the two ends of the through shaft 200 and effectively improving the connection strength of the molding mold.

[0040] It is worth noting that the two ends of the cylinder 100 composed of four mold panels are sealed by two positioning ribs 500. Since the molding mold needs to be put into the furnace for high-temperature curing during the molding process, air holes are also evenly arranged on the positioning ribs 500. While reducing the weight, it can also ensure that the pressure inside and outside the molding mold is consistent, so as to avoid deformation of the molding mold due to the pressure difference between the inside and outside.

[0041] In an optional embodiment, during the forming process, a supporting rib 600 may be provided to improve the strength of the forming mold. Figure 2 and Figure 7 As shown, several support ribs 600 are spaced apart within the tube cavity and fixedly connected to the inner wall of the barrel 100 and the through-shaft 200. Each support rib 600 is provided with a ventilation hole to reduce weight, and each support rib 600 is provided with a weld chamfer at the connection point with the inner wall of the barrel 100. Furthermore, for medium and low speed rotation (below 500 rpm), the support ribs 600 can be removed to reduce the weight of the forming mold.

[0042] For example, the support ribs 600 can be made of steel plates with a thickness of 20 to 40 mm, with a total of 11 pieces evenly distributed. Each support rib 600 is a rectangular structure. To facilitate welding and assembly, triangular chamfers are cut out at the four corners to retain sufficient assembly and welding gaps.

[0043] It is worth noting that the support ribs 600 can increase the rigidity and load-bearing capacity of the cylinder 100, and can also improve the ability of the through-shaft 200 to resist deformation, making the force on the through-shaft 200 uniform. By increasing the number of load-bearing points, the force on the through-shaft 200 is dispersed, reducing the risk of bending of the through-shaft 200. The support ribs 600 serve to transfer part of the pressure borne by the cylinder 100 to the through-shaft 200, thereby ensuring the coaxiality of the through-shaft 200 and the cylinder 100 and improving the molding accuracy.

[0044] It should be noted that both the positioning rib 500 and the supporting rib 600 are provided with ventilation holes for weight reduction and ventilation. By adjusting the distribution of the ventilation holes, the unbalanced rotational inertia of the molding die can be adjusted, that is, by changing the position and size of the ventilation holes, the mass distribution of the molding die can be adjusted, thereby achieving dynamic balance.

[0045] like Figure 2 and Figure 8 As shown, axial ribs 800 can also be provided to further improve the strength of the forming mold. Several axial ribs 800 are provided along the axial direction of the through shaft 200, and each axial rib 800 is respectively connected to the supporting ribs 600 on both sides, the outer wall of the through shaft 200 and the cylinder 100.

[0046] In an optional embodiment, the rigid foam filler can be a polyurethane foam filler, the main components of which are a foaming agent and a matrix. The foaming agent and the matrix are mixed and then uniformly filled into the tube cavity. Furthermore, an adhesive is applied to the outer surface of the through shaft 200, and the adhesive is reacted with the foaming filler in a high temperature environment so that the foaming filler is tightly connected to the through shaft 200. Since the rigid foam filler is light in weight, it is beneficial to reduce the weight of the forming mold; at the same time, the rigid foam filler has a high hardness and can play the role of supporting the mold panel of the cylinder 100, further improving the rigidity and precision of the forming mold, and also helping to evenly distribute the weight of the forming mold and reduce the uneven moment of inertia of the forming mold during rotation.

[0047] The composite launch box forming mold of this utility model supports the cylinder body through positioning ribs and rigid foam filler. Due to the low density of the rigid foam filler, the overall weight of the forming mold is reduced, the rigidity and precision of the forming mold are effectively improved, and the deflection deformation of the forming mold is reduced. At the same time, the clamping and tightening shaft heads are connected to the processing machine tool through the through-shaft. The constraint of the through-shaft also effectively reduces the welding deformation of the cylinder body during the assembly and molding of the forming mold, improves the overall precision of the forming mold, and ensures the quality of the forming surface of the square launch box.

[0048] It should be noted that, in this document, relational terms such as first and second are used solely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, the terms "comprise," "include," or any other variations thereof are intended to encompass non-exclusive inclusion, such that an article or device comprising a list of elements includes not only those elements but also other elements not explicitly listed. Without further limitation, elements defined by the phrase "comprising a..." do not preclude the presence of additional identical elements in the article or device comprising the elements. Terms such as "connected" or "connected" are not limited to physical or mechanical connections but may include electrical connections, whether direct or indirect. References to directions or positional relationships, such as "upper," "lower," "left," and "right," are based on the directions or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplification of the present invention. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention.

[0049] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A composite material launch box forming mold, characterized in that: include: The cylinder (100) is a rectangular tube with a lumen provided inside. The lumen is evenly filled with a hard foam filler. The outside of the cylinder (100) is a molded surface. The through shaft (200) is a hollow shaft, and the through shaft (200) is arranged in the tubular cavity; a clamping shaft head (300), wherein the fixed end of the clamping shaft head (300) is coaxially connected to the first end of the through shaft (200), the clamping end of the clamping shaft head (300) is located outside the tubular cavity, and the clamping end is provided with a transmission keyway; A tightening shaft head (400), wherein the fixed end of the tightening shaft head (400) is coaxially connected to the second end of the through shaft (200), the tightening end of the tightening shaft head (400) is located outside the tube cavity, and the tightening end is provided with a top hole; A positioning rib (500) is provided in the tube cavity and fixedly connected to the inner wall of the cylinder (100); a plurality of the positioning ribs (500) are respectively sleeved on the through shaft (200), the fixed end of the clamping shaft head (300) and the fixed end of the pressing shaft head (400); each of the positioning ribs (500) is provided with a ventilation hole.

2. The composite material launch box forming mold according to claim 1, characterized in that: The cylinder (100) comprises four mold panels, which are fixedly connected in sequence to form a rectangular tube.

3. The composite material launch box forming mold according to claim 1, characterized in that: The first end of the through shaft (200) is provided with a plurality of first positioning pin holes, the plurality of first positioning pin holes are staggered with each other, and a plurality of cylindrical pins pass through the plurality of first positioning pin holes in a one-to-one correspondence and are connected to the clamping shaft head (300).

4. The composite material launch box forming mold according to claim 1, characterized in that: The second end of the through shaft (200) is provided with a plurality of second positioning pin holes, which are staggered with each other, and a plurality of cylindrical pins pass through the plurality of second positioning pin holes in a one-to-one correspondence and are connected to the tightening shaft head (400).

5. The composite material launch box forming mold according to claim 1, characterized in that: The transmission keyway is radially arranged on the end surface of the clamping end of the clamping shaft head (300) and is used to connect to the chuck of a processing machine tool; wherein the width of the transmission keyway ranges from 20 to 80 mm, and the depth ranges from 10 to 40 mm.

6. The composite material launch box forming mold according to claim 1, characterized in that: The center hole is provided on the end surface of the tightening end of the tightening shaft head (400) and is used for connecting to the center of a processing machine tool.

7. The composite material launch box forming mold according to claim 1, characterized in that: The two positioning ribs (500) are respectively arranged at the two ends of the cylinder (100), and are respectively fixedly connected to the inner wall of the cylinder (100) and the through shaft (200).

8. The composite material launch box forming mold according to claim 1, characterized in that: A plurality of reinforcing ribs (700) are respectively connected between the fixed end of the clamping shaft head (300) and the fixed end of the pressing shaft head (400) and the corresponding positioning rib plates (500).

9. The composite material launch box forming mold according to claim 1, characterized in that: Also includes: Support ribs (600), a plurality of said support ribs (600) are arranged at intervals in the tube cavity and are respectively fixedly connected to the inner wall of the cylinder (100) and the through shaft (200); each of said support ribs (600) is provided with a ventilation hole, and a welding chamfer is provided at the connection position between each of said support ribs (600) and the inner wall of the cylinder (100).

10. The composite material launch box forming mold according to claim 9, characterized in that: Also includes: Axial ribs (800), wherein a plurality of the axial ribs (800) are arranged along the axial direction of the through shaft (200), and each of the axial ribs (800) is respectively connected to the supporting ribs (600) on both sides, the outer wall of the through shaft (200) and the cylinder (100).

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