Lightweight composite forge piece structure

Abstract

The utility model discloses a lightweight composite forge piece structure which comprises a forge piece body, the forge piece body is of a bent arm structure and comprises a first straight rod part and a second straight rod part which are arranged in an obtuse angle mode, a first drilling part is arranged at the end of the first straight rod part, and a second drilling part is arranged at the end of the second straight rod part. Concave mounting grooves are formed in the lateral belly part of the first straight rod part and the connecting position of the first straight rod part and the second straight rod part, hollow structures in the vertical direction are arranged on the first straight rod part and the second straight rod part, the forge piece body is formed by forging an outer-layer forge piece and an inner-layer casting, and a transition layer is arranged between the outer-layer forge piece and the inner-layer casting. Light weight of the forge piece is achieved, energy consumption of equipment is reduced, double requirements of high strength and high toughness are met, reliability of the forge piece is improved, stress concentration is avoided through the transition layer, the service life of the forge piece is prolonged, local performance is optimized through the reinforcing ribs and the hollowed-out structure, and the material utilization rate is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a forge piece technical field, especially a kind of lightweight composite forge piece structure, it is applicable to the field of higher weight and performance requirement, such as aerospace, new energy vehicle etc. BACKGROUND

[0002] Automobile lightweight refers to the premise of guaranteeing the strength and safety performance of automobile, possibly reducing the overall quality of automobile, thereby improving the power performance of automobile, reducing fuel consumption, reducing exhaust pollution.The traditional forge piece is usually manufactured using single homogeneous material, it is difficult to meet the demand of high strength, high toughness and lightweight, and weight redundancy, which affects the energy efficiency of equipment. SUMMARY

[0003] According to the above-mentioned technical problem to be solved, a lightweight composite forge piece structure is provided, which realizes the differential distribution of mechanical properties of different regions of the forge piece through material design and process optimization, while reducing the weight.

[0004] To achieve the above object, the utility model discloses a kind of lightweight composite forge piece structure, including forge piece body, the forge piece body is bent arm structure, including first straight rod portion and second straight rod portion being arranged as obtuse angle, first straight rod portion end is provided with first drill hole portion, second straight rod portion end is provided with second drill hole portion, first straight rod portion side abdomen and the connecting position of first straight rod portion and second straight rod portion are provided with recessed mounting slot, first straight rod portion and second straight rod portion are provided with vertical hollow structure, the forge piece body is forged by outer layer forge piece and inner layer casting, transition layer is provided between outer layer forge piece and inner layer casting.

[0005] Further, the outer layer forge piece adopts high-strength alloy steel, and the main structure of the forge piece body is formed by forging process.

[0006] Further, the inner layer casting adopts lightweight high-toughness material, including aluminum alloy or magnesium alloy, and is filled in the outer layer forge piece by casting process.

[0007] Further, the transition layer is located between the outer layer forge piece and the inner layer casting, and a layer of high-temperature-resistant ceramic is coated on the surface of the heat-resistant metal by diffusion welding or spraying process.

[0008] Further, the mounting slot is provided with a local thickening structure on the upper and lower sides, and a reinforcing rib is arranged on the arc surface of the side of the first straight rod portion away from the mounting slot and the outer side of the first drill hole portion and the second drill hole portion.

[0009] Further, the reinforcing rib is arranged in the stress area of the forge piece body.

[0010] Further, the hollow structure is arranged in a non-stress area of the forging body, and the cross-sectional shape of the hollow structure is circular, triangular or trapezoidal.

[0011] Compared with the prior art, the utility model discloses a kind of lightweight composite forging structure, realize the lightweight of forging, reduce equipment energy consumption, satisfy the dual requirement of high strength and high toughness, improve the reliability of forging, transition layer avoids stress concentration, prolongs the service life of forging, stiffener and hollow structure optimize local performance, improve material utilization. BRIEF DESCRIPTION OF DRAWINGS

[0012] The utility model will be further described in detail in combination with the drawings and specific embodiments.

[0013] Figure 1 It is overall structure schematic diagram of the utility model.

[0014] Figure 2 It is top view of the utility model.

[0015] Figure 3 It is internal material schematic diagram of the utility model.

[0016] In the drawing: 1 is first straight pole part;2 is second straight pole part;3 is first drilling part;4 is second drilling part;5 is installation slot;6 is local thickening structure;7 is stiffener;8 is hollow structure;11 is outer layer forging;12 is inner layer casting;13 is transition layer. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the utility model.

[0018] One embodiment of the utility model, such as Figure 1 And Figure 2As shown, the forging body is a bent arm structure, including a first straight rod part 1 and a second straight rod part 2 arranged at an obtuse angle, the first straight rod part 1 is provided with a first drill hole part 3 at the end, the second straight rod part 2 is provided with a second drill hole part 4 at the end, an inner recessed mounting groove 5 is arranged at the side of the first straight rod part 1 and the connecting position of the first straight rod part 1 and the second straight rod part 2, a vertical hollow structure 8 is arranged on the first straight rod part 1 and the second straight rod part 2, the forging body is forged by an outer layer forging 11 and an inner layer casting 12, a transition layer 13 is arranged between the outer layer forging 11 and the inner layer casting 12, through material design and process optimization, the mechanical property of different regions of the forging is differentially distributed, the weight is reduced, the lightweight of the forging is realized, the equipment energy consumption is reduced, the dual requirements of high strength and high toughness are met, the reliability of the forging is improved, the transition layer avoids stress concentration, prolongs the service life of the forging, the local performance is optimized by the reinforcing ribs and the hollow structure, and the material utilization rate is improved.

[0019] The outer layer forging 11 adopts high-strength alloy steel, and the main structure of the forging body is formed through a forging process, providing high strength and wear resistance. Specifically, the outer layer forging can select materials according to different application scenarios, such as using titanium alloy in high-temperature environments, or coating a wear-resistant coating or a corrosion-resistant coating on the surface of the outer layer forging to improve the service life.

[0020] The inner layer casting 12 adopts lightweight and high-toughness materials, including aluminum alloy or magnesium alloy, and is filled inside the outer layer forging through a casting process to reduce the weight of the forging and improve its toughness.

[0021] The transition layer 13 is located between the outer layer forging 11 and the inner layer casting 12, and a layer of high-temperature-resistant ceramic is coated on the surface of the heat-resistant metal through diffusion welding or spraying process. Due to the large difference in thermal expansion coefficient between the two, a large thermal stress is generated at the interface. By continuously controlling the internal composition and maintaining the change of the structure between the two, the thermal stress at the interface is eliminated, and the heat resistance and mechanical properties of the overall material are improved. The gradient transition layer realizes smooth transition of material performance and avoids stress concentration.

[0022] Local thickening structures 6 are arranged on the upper and lower sides of the mounting groove 5, reinforcing ribs 7 are arranged on the arc surfaces of the side of the first straight rod part 1 away from the mounting groove 5 and the outer sides of the first drill hole part 3 and the second drill hole part 4, and the reinforcing ribs 7 are arranged in the stress area of the forging body to improve the local strength and stiffness and ensure the reliability of the forging body in the area with large stress.

[0023] The hollow structure 8 is arranged in the non-stress area of the forging body, and the cross-sectional shape of the hollow structure 8 is circular, triangular or trapezoidal, further reducing the overall weight and improving the material utilization rate.

[0024] The working principle of the embodiment is as follows: a multi-step forging process is adopted, a high-strength outer layer forging part is formed first, then a light inner layer casting part is filled, the bonding strength of the gradient transition layer is optimized through a heat treatment process, and the forging part structure is further optimized by using a topology optimization technology, the topology optimization is a mathematical method for optimizing material distribution in a specified area according to given load conditions, constraint conditions and performance indexes, and more extreme lightweight design is realized.

[0025] The points needing to be explained are as follows: firstly, in the description of the present application, it needs to be explained that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, which can be mechanical connection or electrical connection, can be the communication inside two elements, and can be direct connection, "up", "down", "left", "right" and the like are only used to represent relative positional relationship, when the absolute position of the described object changes, the relative positional relationship can change; secondly, in the present text, the relationship terms such as first and second are only used to distinguish one entity from another, and do not necessarily require or imply that there is any such actual relationship or order between the entities.

[0026] The above examples only illustrate the present application, and do not constitute a limitation on the protection scope of the present application, and any design identical or similar to the present application belongs to the protection scope of the present application.

Claims

1. A lightweight composite forging structure comprising a forging body, characterized by, The forging body is a bent arm structure, comprising a first straight rod part (1) and a second straight rod part (2) arranged at an obtuse angle, a first drill hole part (3) is arranged at the end of the first straight rod part (1), a second drill hole part (4) is arranged at the end of the second straight rod part (2), an inner recessed mounting groove (5) is arranged at the side of the first straight rod part (1) and the connecting position of the first straight rod part (1) and the second straight rod part (2), a vertical hollow structure (8) is arranged on the first straight rod part (1) and the second straight rod part (2), the forging body is forged by an outer layer forging (11) and an inner layer casting (12), and a transition layer (13) is arranged between the outer layer forging (11) and the inner layer casting (12).

2. A lightweight composite forged structure according to claim 1, wherein The outer layer forging (11) is made of high-strength alloy steel, and the main structure of the forging body is formed through a forging process.

3. A lightweight composite forged structure according to claim 1, wherein The inner layer casting (12) is made of a lightweight and high-toughness material, including aluminum alloy or magnesium alloy, and is filled in the outer layer forging through a casting process.

4. The lightweight composite forging structure of claim 1, wherein The transition layer (13) is located between the outer layer forging (11) and the inner layer casting (12), and a layer of high-temperature-resistant ceramic is coated on the surface of the heat-resistant metal through a diffusion welding or spraying process.

5. A lightweight composite forged structure according to claim 1, wherein Local thickening structures (6) are arranged on the upper and lower sides of the mounting groove (5), reinforcing ribs (7) are arranged on the arc surfaces of the side of the first straight rod part (1) away from the mounting groove (5) and the outer sides of the first drill hole part (3) and the second drill hole part (4).

6. A lightweight composite forged structure according to claim 5, wherein The reinforcing ribs (7) are arranged in the stress area of the forging body.

7. A lightweight composite forged structure according to claim 1, wherein The hollow structure (8) is arranged in the non-stress area of the forging body, and the cross-sectional shape of the hollow structure (8) is circular, triangular or trapezoidal.

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