A stir-friction additive substrate mounting tool with anti-deformation function

Abstract

This utility model discloses a friction stir additive manufacturing substrate mounting fixture with anti-deformation function, belonging to the field of additive manufacturing technology. It includes a rectangular fixture mother plate with a weight-reducing hole in the middle. A groove is formed on the lower surface of the rectangular fixture mother plate outside the weight-reducing hole. A grid-shaped weight-reducing mesh is arranged in the groove outside the weight-reducing hole, dividing the groove into several mesh slot units. Several threaded mounting holes are equally spaced on the upper surface of the rectangular fixture mother plate. This utility model simply and effectively meets the requirement of preventing substrate deformation, can effectively adapt to plates of different materials and thicknesses, provides stable and reliable additive manufacturing conditions, and ensures the forming accuracy of the workpiece during friction stir additive manufacturing from the perspective of suppressing deformation.

Description

Technical Field

[0001] This utility model relates to the field of additive manufacturing technology, specifically to a friction stir additive substrate mounting fixture with anti-deformation function. Background Technology

[0002] Friction stir solid-state continuous additive manufacturing technology is a variant technology combining friction stir welding and friction surfacing. The additive raw materials for this technology can be metal powders, wires, rods, etc.

[0003] During the friction stir process, the continuous downward pressure on the deposited layer can easily deform the substrate, affecting the dimensional accuracy and precision of the workpiece. Therefore, to avoid substrate deformation, a common method is to use a thickened substrate. Since the substrate is typically used only once, and to ensure a good bonding rate with the workpiece, the substrate is usually made of the same material. When the additive raw material is a rare material, if the substrate is too thick, the cost is too high and the economic efficiency is poor; if the substrate is too thin, it is prone to deformation, affecting the forming accuracy. Therefore, it is essential to design a friction stir additive substrate mounting fixture with anti-deformation function. Utility Model Content

[0004] The purpose of this invention is to provide a mounting fixture for a friction stir additive manufacturing substrate with anti-deformation function, so as to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a friction stir additive manufacturing substrate mounting fixture with anti-deformation function, including a rectangular fixture mother plate, a weight reduction hole in the middle of the rectangular fixture mother plate, a groove on the lower surface of the rectangular fixture mother plate outside the weight reduction hole, a grid-shaped weight reduction mesh rib in the groove outside the weight reduction hole, the grid-shaped weight reduction mesh rib dividing the groove into several mesh slot units, and several mounting threaded holes penetrating the rectangular fixture mother plate are equally spaced on the upper surface of the rectangular fixture mother plate. The substrate is placed on the upper surface of the rectangular fixture mother plate and connected to the rectangular fixture mother plate by bolts. The grid-shaped weight reduction mesh rib and the mesh slot units cooperate to facilitate the absorption of residual stress in the cladding layer during friction stir solid-phase continuous additive manufacturing. The fixture constrains the substrate deformation direction in the opposite direction through the stressed bolts, that is, the substrate deformation is constrained by the fixture, without the substrate itself, and a thinner substrate can be used for additive manufacturing, thereby reducing material costs while preventing deformation.

[0006] In a further embodiment, the rectangular tooling mother plate has several clamping holes on two sides at the same row of grid groove units, each corresponding to one of the grid groove units. The other two sides of the rectangular tooling mother plate have clamping holes at the middle grid groove unit, each corresponding to the middle grid groove unit. After the substrate and the rectangular tooling mother plate are installed, the whole assembly is stably clamped onto the friction stir additive manufacturing worktable through the clamping holes.

[0007] In a further embodiment, the rectangular tooling mother plate has lifting holes on two other sides located on both sides of the clamping hole. After the substrate and the rectangular tooling mother plate are installed, the whole assembly is lifted and transferred to the friction stir additive manufacturing worktable through the lifting holes.

[0008] In a further embodiment, the mounting threaded hole is an M20 countersunk through hole, and one mounting threaded hole is provided every 60mm. By machining threaded holes on the substrate according to the tooling hole positions, the tooling can be adapted to multi-size friction stir additive manufacturing substrates.

[0009] In a further embodiment, the diameter of the weight-reducing hole is 350mm, and the overall weight of the tooling is reduced through the weight-reducing hole.

[0010] In a further embodiment, the clamping hole is 100mm long and 75mm wide, and the clamping hole facilitates the fixing of the tooling on the friction stir additive manufacturing worktable.

[0011] In a further embodiment, the lifting hole is an M20 countersunk through hole, which facilitates the lifting and transfer of the tooling.

[0012] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: the substrate is placed on the upper surface of the rectangular tooling mother plate and connected to the rectangular tooling mother plate by bolts. The residual stress of the cladding layer in the friction stir solid-phase continuous additive manufacturing is easily absorbed by the crisscross-shaped weight-reducing mesh ribs and mesh groove units. The tooling constrains the substrate deformation direction in the opposite direction through the stressed bolts. That is, the substrate deformation is constrained by the tooling, without the need for the substrate itself. This simply and effectively meets the requirement of preventing substrate deformation, can effectively adapt to plates of different materials and thicknesses, provides stable and reliable additive manufacturing conditions, and ensures the forming accuracy of the workpiece in the friction stir additive manufacturing process from the perspective of suppressing deformation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the lower surface structure of the rectangular tooling mother plate of this utility model;

[0015] The attached diagram is labeled as follows: 1. Rectangular tooling mother plate; 2. Mounting threaded hole; 3. Clamping hole; 4. Lifting hole; 5. Grid-shaped weight-reducing mesh reinforcement; 6. Weight-reducing hole; 7. Grid groove unit. Detailed Implementation

[0016] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid obscuring the invention.

[0017] Please see Figure 1-2 This utility model provides a technical solution: a friction stir additive manufacturing substrate mounting fixture with anti-deformation function. A rectangular fixture mother plate 1 has a weight-reducing hole 6 in the middle. A groove is formed on the lower surface of the rectangular fixture mother plate 1 outside the weight-reducing hole 6. A grid-shaped weight-reducing mesh rib 5 is arranged in the groove outside the weight-reducing hole 6, dividing the groove into several mesh slot units 7. Each mesh slot unit 7 includes four square mesh slot units 7 located at the four corners of the groove and four rectangular mesh slot units 7 located between two square mesh slot units 7. A number of mounting threaded holes 2, which penetrate the rectangular tooling mother plate 1, are equally spaced on the upper surface of the mother plate 1. The substrate is placed on the upper surface of the rectangular tooling mother plate 1 and connected to the rectangular tooling mother plate 1 by bolts. The crisscross-shaped weight-reducing mesh ribs 5 and mesh groove units 7 cooperate to facilitate the absorption of residual stress in the cladding layer during friction stirring solid-phase continuous additive manufacturing. The tooling constrains the substrate deformation direction in the opposite direction through the stressed bolts. That is, the substrate deformation is constrained by the tooling, without the substrate itself. A thinner substrate can be used for additive manufacturing, thereby reducing material costs while preventing deformation.

[0018] In a further embodiment, the rectangular tooling mother plate 1 has several clamping holes 3 on two sides at the same row of grid groove units 7, which correspond one-to-one with the grid groove units 7. There are three clamping holes 3 on the same side. The other two sides of the rectangular tooling mother plate 1 have clamping holes 3 at the middle grid groove unit 7, which correspond to the middle grid groove unit 7. There is one clamping hole 3 on the same side. After the substrate and the rectangular tooling mother plate 1 are installed, the whole is stably clamped on the friction stir additive manufacturing worktable through the clamping holes 3.

[0019] In a further embodiment, the rectangular tooling mother plate 1 has two other sides with lifting holes 4 on both sides of the clamping hole 3. After the substrate and the rectangular tooling mother plate 1 are installed, the whole assembly is lifted and transferred to the friction stir additive manufacturing worktable through the lifting holes 4.

[0020] In a further embodiment, the mounting threaded hole 2 is an M20 countersunk through hole, and one mounting threaded hole 2 is provided every 60mm. By machining threaded holes on the substrate according to the tooling hole positions, the tooling can be adapted to multi-size friction stir additive manufacturing substrates.

[0021] In a further embodiment, the weight reduction hole 6 has a diameter of 350mm, and the overall weight of the tooling is reduced through the weight reduction hole 6.

[0022] In a further embodiment, the clamping hole 3 is 100mm long and 75mm wide, and the clamping hole 3 facilitates the fixing of the tooling on the friction stir additive manufacturing worktable.

[0023] In a further embodiment, the lifting hole 4 is an M20 countersunk through hole, and the clamping hole 3 facilitates the lifting and transfer of the tooling.

[0024] Working principle: The substrate is placed on the upper surface of the rectangular tooling mother plate 1 and connected to the rectangular tooling mother plate 1 by bolts. The crisscross-shaped weight-reducing mesh ribs 5 and mesh groove units 7 cooperate to absorb the residual stress of the cladding layer in the friction-stirring solid-phase continuous additive manufacturing. The tooling constrains the substrate deformation direction in the opposite direction through the stressed bolts. That is, the substrate deformation is constrained by the tooling, without the substrate itself. A thinner substrate can be used for additive manufacturing, thereby reducing material costs while preventing deformation.

[0025] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A mounting fixture for a friction stir additive manufacturing substrate with anti-deformation function, comprising a rectangular fixture mother plate (1), characterized in that: The rectangular tooling mother plate (1) has a weight-reducing hole (6) in the middle. The lower surface of the rectangular tooling mother plate (1) has a groove outside the weight-reducing hole (6). The groove has a grid-shaped weight-reducing mesh rib (5) outside the weight-reducing hole (6). The grid-shaped weight-reducing mesh rib (5) divides the groove into several mesh slot units (7). The upper surface of the rectangular tooling mother plate (1) has several mounting threaded holes (2) that penetrate the rectangular tooling mother plate (1) at equal intervals.

2. The mounting fixture for a friction stir additive manufacturing substrate with anti-deformation function according to claim 1, characterized in that: The rectangular tooling mother plate (1) has several clamping holes (3) on two sides located at the same row of the grid groove units (7), which correspond one-to-one with the grid groove units (7). The other two sides of the rectangular tooling mother plate (1) have clamping holes (3) on the middle grid groove unit (7), which correspond to the middle grid groove unit (7).

3. The mounting fixture for a friction stir additive manufacturing substrate with anti-deformation function according to claim 2, characterized in that: The rectangular tooling mother plate (1) has two additional lifting holes (4) on its other two sides located on both sides of the clamping hole (3).

4. The mounting fixture for a friction stir additive manufacturing substrate with anti-deformation function according to claim 1, characterized in that: The mounting threaded hole (2) is an M20 countersunk through hole, and one mounting threaded hole (2) is provided every 60mm.

5. The mounting fixture for a friction stir additive manufacturing substrate with anti-deformation function according to claim 1, characterized in that: The diameter of the weight reduction hole (6) is 350 mm.

6. The mounting fixture for a friction stir additive manufacturing substrate with anti-deformation function according to claim 2, characterized in that: The clamping hole (3) is 100mm long and 75mm wide.

7. The mounting fixture for a friction stir additive manufacturing substrate with anti-deformation function according to claim 3, characterized in that: The lifting hole (4) is an M20 countersunk through hole.

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