A target assembly for use in the projection of a ply of a composite material prepreg
Patent Information
- Application Number
- CN202522221223.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-21
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-10-21
AI Technical Summary
[0003]利用复合材料的铺层可设计性特点，设计人员可以灵活的设计出符合使用需求的产品结构，但如果要真正实现产品的结构性能，还需要在后续的制造工艺中完整、正确、准确的落实设计对产品的铺层要求，包括铺层方向、铺层角度、铺层数量等，而激光铺层定位系统就可以很好的保证复合材料产品的铺层，它主要由计算机控制系统、激光头支架、激光发射头、定位头、系统校准激光反射片、校验工装等组成，其中定位头由靶标、和复合材料成型工装上的靶标孔组成，通常的靶标孔依据靶标底座的直径在成型工装边缘直接开出即可，而这样的靶标孔常常会因靶标孔自身孔径制造的公差，引起靶标插入后晃动，或者是无法插入，也会因工装使用后型面的变化或者是孔内落灰、生锈等，导致靶标无法插入情况的发生
[0015]与现有技术相比，本实用新型具有如下优点：靶标插入靶标插孔内既快捷又方便，也不会发生晃动或者是插不进去的情况，不仅提高了复合材料零件铺贴效率，也使复合材料零件的生产周期得到了保证。
Smart Images
Figure CN224898165U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a target assembly for projection of composite prepreg layup, belonging to the field of composite material manufacturing technology. Background Technology
[0002] In addition to having high specific modulus, high specific strength, and good fatigue resistance, corrosion resistance, temperature resistance, heat insulation, electrical insulation, and light weight, composite materials also have unique layup designability. These advantages make them applicable in aerospace, automotive industry, construction industry, sporting goods, medical fields, etc., with their application in aircraft, missile, and spacecraft manufacturing being particularly widespread.
[0003] Taking advantage of the designability of composite material layups, designers can flexibly design product structures that meet usage requirements. However, to truly realize the structural performance of the product, it is necessary to fully, correctly, and accurately implement the design requirements for the product's layup in the subsequent manufacturing process, including layup direction, layup angle, and layup quantity. The laser layup positioning system can effectively ensure the layup of composite material products. It mainly consists of a computer control system, laser head support, laser emitter, positioning head, system calibration laser reflector, and calibration fixture. The positioning head consists of a target and target holes on the composite material molding fixture. Typically, the target holes are directly cut at the edge of the molding fixture according to the diameter of the target base. However, such target holes often cause the target to wobble after insertion or fail to be inserted due to the manufacturing tolerance of the target hole diameter itself. Changes in the surface of the fixture after use or dust and rust inside the hole can also cause the target to fail to be inserted. Summary of the Invention
[0004] The purpose of this invention is to provide a target assembly for projection of composite prepreg layup to avoid situations where the target cannot be inserted into the target hole or shakes when inserted. This ensures that the target and target hole can be used conveniently and quickly during the layup process of composite products, thereby improving layup efficiency and enabling short-cycle production of composite products.
[0005] To achieve the above objectives, this utility model adopts the following technical solution: a target assembly for projection of composite prepreg layup, the target assembly including a target and a target insertion hole; the target includes a target head and a target base, the target head is disposed on the target base, a laser reflective material mounting groove is formed on its upper surface, and a limiting groove is formed along the circumference of the target base; the target insertion hole includes a forming fixture and a limiting structure, the forming fixture has a mounting hole for inserting the target base, the mounting hole penetrates the upper and lower surfaces of the forming fixture, the limiting structure is arranged radially along the mounting hole, one end of which is limited, and the other end is adapted to the limiting groove; when the target is inserted into the target insertion hole, the end of the limiting structure protrudes from the inner surface of the mounting hole and is engaged in the limiting groove, thereby confining the target within the target insertion hole.
[0006] Preferably, a limiting hole is provided between the upper and lower surfaces of the forming tool to allow the limiting structure to move. The limiting hole is arranged radially along the mounting hole and communicates with the mounting hole. When the target is inserted into the target insertion hole, the limiting structure is compressed in the limiting hole. When the target is fully inserted into the target insertion hole, the end of the limiting structure protrudes out of the limiting hole and is locked into the limiting groove.
[0007] Preferably, the axial direction of the limiting structure is consistent with the axial direction of the limiting hole, and it includes a compression spring and a retaining ball. One end of the compression spring fixes the retaining ball, and the other end is limited in the limiting hole. The extension length of the limiting hole is between the compressed length of the limiting structure and its free state length.
[0008] Preferably, the axis of the limiting hole is at a 45° angle to the side end face of the forming tool.
[0009] Preferably, the number of limiting holes is multiple, including blind holes and through holes. The blind holes and through holes are arranged opposite to each other, and the other opening end of the through hole is located on the side of the forming tool. The limiting structure is limited in the through hole by fasteners.
[0010] Preferably, a sliding groove is provided along the axial direction of the target base, one end of the sliding groove is connected to the limiting groove, and the other end is located on the bottom surface of the target base; the number of sliding grooves is the same as the number of limiting grooves, so that the limiting structure can be inserted into the limiting groove.
[0011] Preferably, a bushing is installed in the mounting hole, the inner diameter of the bushing is adapted to the outer diameter of the target base, and the height of the bushing is consistent with the height of the mounting hole; through holes are opened along the circumference of the bushing, the number and position of the through holes correspond to the limiting holes, and the diameter of the through holes is smaller than the diameter of the ball.
[0012] Preferably, a wedge-shaped rib is provided along the outer circumference of the bushing, the height direction of the wedge-shaped rib is consistent with the height direction of the bushing, and matches the wedge-shaped groove opened in the axial direction of the mounting hole.
[0013] Preferably, the wedge groove is located between adjacent limiting holes.
[0014] Preferably, the diameter of the through hole further away from the center of the mounting hole is larger than the diameter of the through hole closer to the center of the mounting hole.
[0015] Compared with the prior art, the present invention has the following advantages: the target insertion into the target hole is quick and convenient, and there will be no shaking or failure to insert. This not only improves the laying efficiency of composite material parts, but also ensures the production cycle of composite material parts. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the target structure in an embodiment of this utility model; Figure 2 This is a schematic diagram of the target insertion hole structure in an embodiment of this utility model; Figure 3 This is a schematic diagram of the target being inserted into the target insertion hole in an embodiment of this utility model; Figure 4 This is a front view of the target being inserted into the target socket in an embodiment of this utility model; Figure 5 yes Figure 4 AA section view; Figure 6 yes Figure 4 BB section view; Figure 1-6 In the diagram, 1—laser reflective material mounting groove; 2—target head; 3—ball clamping groove; 4—ball clamping slide; 5—target base; 6—forming fixture; 7—ball clamping; 8—bulb; 9—bolt plug; 10—compression spring. Detailed Implementation
[0017] The following is in conjunction with the appendix Figure 1-6 The present invention is further described in detail as follows: A target assembly for projection of composite prepreg layup, the target assembly including a target and a target insertion hole; the target includes a target head and a target base, the target head 2 is disposed on the target base 5, a laser reflective material mounting groove 1 is formed on its upper surface, and a limiting groove is provided along the circumference of the target base 5. In this embodiment, the limiting groove includes a ball-holding groove 3 and a ball-holding sliding groove 4; the target insertion hole includes a forming fixture 6 and a limiting structure, the forming fixture 6 has a mounting hole for inserting the target base 5, the mounting hole penetrates the upper and lower surfaces of the forming fixture 6, the limiting structure is arranged radially along the mounting hole, one end of which is limited, and the other end is adapted to the limiting groove; when the target is inserted into the target insertion hole, the end of the limiting structure protrudes from the inner surface of the mounting hole and is engaged in the limiting groove, thereby confining the target within the target insertion hole.
[0018] Specifically, like Figure 1 As shown, the target consists of a laser reflective material mounting groove 1, a target head 2, a ball-holding groove 3, a ball-holding slide 4, and a target base 5; and a target insertion hole (such as...). Figure 2 The part that mates with the target is the target base 5; the ball-holding groove 3 and the ball-holding slide 4 are both located on the target base 5. The ball-holding slide 4 facilitates the insertion of the target into the target insertion hole and serves as a guide. The ball-holding groove 3 allows the ball 7 (as shown) to be held in place. Figure 2 As shown, the target is fixed at this location for positioning. The dimensions of the ball-holding groove 4 and the ball-holding recess 3 are designed according to the dimensions of the ball 7 itself to ensure that the target can be smoothly installed in the target insertion hole and remain stationary, which is beneficial for subsequent paving and layer projection.
[0019] like Figure 2 As shown, the target insertion hole includes a molding fixture 6, a retaining ball 7, a compression spring 10, and a bushing 8. Suitable holes are made in the composite material part laying molding fixture 6, including limiting holes for mounting the compression spring 10 and retaining ball 7 on the side, and mounting holes for mounting the bushing 8 perpendicular to the surface of the molding fixture 6. The retaining ball 7 is fixed to one end of the compression spring 10, and the other end is limited in the limiting hole. The inner diameter of the bushing 8 is adapted to the outer diameter of the target base 5, and the height of the bushing 8 is consistent with the height of the mounting hole. Through holes are made along the circumference of the bushing 8, and the number and position of the through holes correspond to the limiting holes. The diameter of the through holes is smaller than the diameter of the retaining ball 7.
[0020] As a preferred embodiment of this invention, a wedge-shaped rib is provided along the outer circumference of the bushing 8. The height direction of the wedge-shaped rib is consistent with the height direction of the bushing 8 and matches the wedge-shaped groove opened in the axial direction of the mounting hole.
[0021] In a preferred embodiment of this invention, the limiting hole serves as a guide groove, and its opening diameter is determined according to the outer diameter of the compression spring 10 and the thickness of the tooling surface 6. The opening depth needs to pass through the mounting hole and extend to a certain depth. The extension depth is not greater than the total length of a compression spring 10 and a ball 7 in a free state docking, and not less than the total length of a compression spring 10 after being compressed and a ball 7 docking. The axis of the limiting hole forms a 45° angle with the side end face of the forming tooling 6.
[0022] As a preferred embodiment of this example, the number of limiting holes is four, including two blind holes and two through holes. The blind holes and through holes are arranged opposite to each other, and the axes of adjacent blind holes and through holes are perpendicular to each other. The other opening end of the through hole is located on the side of the forming tool 6. The ball 7 and the compression spring 10 are limited in the through hole by the bolt plug 9. The opening diameter of the mounting hole is determined according to the diameter of the target base 5 and the shape of the bushing 8. The wedge groove that mates with the wedge rib on the bushing 8 is located in the middle of the limiting holes of two adjacent ball retainers 7. The inner diameter of the bushing 8 needs to match the diameter of the target base 5, and the outer diameter is determined according to the height of the ball retainer 7 that is allowed to protrude, that is, the depth of the ball retainer groove 3 on the target base 5. The opening diameter of the through hole between two adjacent wedge ribs on the bushing 8 is required to be 3 / 4 of the diameter of the ball retainer 7 on one side of the wedge rib and 1 / 2 of the diameter of the ball retainer 7 on the other side.
[0023] The target insertion hole fabrication and installation process is as follows: A suitable hole is drilled in the composite material part laying and molding fixture 6. After drilling the hole in the molding fixture 6, a bushing 8 is fabricated. After fabricating the bushing 8, a bolt plug 9 is fabricated. The bolt plug 9 needs to match the diameter of the limiting hole (i.e., guide groove) of the compression spring 10. After installation, ensure that the compression spring 10 can compress the retaining ball 7 to firmly position the target. Then, assemble the target insertion hole by inserting two compression springs 10 into the mounting holes of the two compression springs 10 and retaining ball 7 located on one side of the molding fixture 6. After the compression springs 10 are inserted, they need to compress the retaining ball 7. Install the bushing 8 to install the two retaining balls 7. After pressing the retaining balls 7 firmly through the holes in the bushing 8, the retaining balls 7 should return to their original shape, reaching the set protrusion amount. Then, insert one retaining ball 7 into each of the two compression springs 10 located on one side of the edge of the forming fixture 6 and into the limiting holes of the retaining balls 7. After inserting the retaining balls 7, insert one compression spring 10 into each of them and tighten the bolt plug 9 to seal them. After sealing, press the retaining balls 7 firmly through the holes in the bushing 8, and the retaining balls 7 should return to their original shape, reaching the set protrusion amount. This completes the fabrication of the target insertion hole.
[0024] The above embodiments are merely preferred embodiments of this utility model and do not constitute a limitation thereof. Any extensions, modifications, or equivalent substitutions made by those skilled in the art without departing from the technical solution of this utility model should be included within the protection scope of this utility model.
Claims
1. A target assembly for projection using composite prepreg layup, characterized in that: The target assembly includes a target and a target insertion hole. The target includes a target head and a target base. The target head is disposed on the target base and has a laser reflective material mounting groove on its upper surface. A limiting groove is provided along the circumference of the target base. The target insertion hole includes a forming fixture and a limiting structure. The forming fixture has a mounting hole for inserting the target base. The mounting hole penetrates the upper and lower surfaces of the forming fixture. The limiting structure is radially arranged along the mounting hole. One end of the limiting structure is limited, and the other end is adapted to the limiting groove. When the target is inserted into the target insertion hole, the end of the limiting structure protrudes from the inner surface of the mounting hole and is engaged in the limiting groove, thereby confining the target within the target insertion hole.
2. The target assembly for projection of composite prepreg layup according to claim 1, characterized in that: A limiting hole is provided between the upper and lower surfaces of the forming tool to allow the limiting structure to move. The limiting hole is arranged radially along the mounting hole and communicates with the mounting hole. When the target is inserted into the target insertion hole, the limiting structure is compressed in the limiting hole. When the target is fully inserted into the target insertion hole, the end of the limiting structure protrudes out of the limiting hole and is locked into the limiting groove.
3. The target assembly for projection of composite prepreg layup according to claim 2, characterized in that: The axial direction of the limiting structure is consistent with the axial direction of the limiting hole. It includes a compression spring and a retaining ball. One end of the compression spring fixes the retaining ball, and the other end is limited in the limiting hole. The extension length of the limiting hole is between the compressed length of the limiting structure and its free state length.
4. The target assembly for projection of composite prepreg layup according to claim 2, characterized in that: The axis of the limiting hole forms a 45° angle with the side end face of the forming tool.
5. The target assembly for projection of composite prepreg layup according to any one of claims 2-4, characterized in that: There are multiple limiting holes, including blind holes and through holes. The blind holes and through holes are arranged opposite to each other. The other opening end of the through hole is located on the side of the forming tool. The limiting structure is confined in the through hole by fasteners.
6. The target assembly for projection of composite prepreg layup according to claim 1, characterized in that: A sliding groove is provided along the axial direction of the target base. One end of the sliding groove is connected to the limiting groove, and the other end is located on the bottom surface of the target base. The number of sliding grooves is the same as the number of limiting grooves, which facilitates the limiting structure to be inserted into the limiting groove.
7. The target assembly for projection of composite prepreg layup according to claim 3, characterized in that: A bushing is installed in the mounting hole. The inner diameter of the bushing is adapted to the outer diameter of the target base, and the height of the bushing is consistent with the height of the mounting hole. Through holes are opened along the circumference of the bushing. The number and position of the through holes correspond to the limiting holes, and their diameter is smaller than the diameter of the ball.
8. The target assembly for projection of composite prepreg layup according to claim 7, characterized in that: A wedge-shaped rib is provided along the outer circumference of the bushing. The height direction of the wedge-shaped rib is consistent with the height direction of the bushing and matches the wedge-shaped groove opened in the axial direction of the mounting hole.
9. The target assembly for projection of composite prepreg layup according to claim 8, characterized in that: The wedge-shaped groove is located between adjacent limiting holes.
10. The target assembly for projection of composite prepreg layup according to claim 7, characterized in that: The diameter of the through hole further away from the center of the mounting hole is larger than the diameter of the through hole closer to the center of the mounting hole.