Method for manufacturing U-shaped part through upper bearing arm forging and bending die

Abstract

The invention relates to the technical field of die design and application, in particular to a method for manufacturing a U-shaped part through an upper bearing arm forging and bending die, which comprises the following steps: S1, die design and forming: rough forming of the die and finish machining of the die, and S2, U-shaped part machining: raw material preparation, roll forging, bending and forging, and the U-shaped part is manufactured through the steps. According to the U-shaped part forming die, the two bending dies are arranged, and raw materials can be rapidly bent and forged twice through the two bending dies, so that a U-shaped part product can be rapidly formed, the production efficiency is improved, the product quality is guaranteed, and the large-scale production level is improved; according to the method, the structure design of the bending die is carried out by utilizing the difference value of the surface areas, the structure design of the bending die can be accurately carried out, the adaptability of the bending die and the U-shaped piece is improved, and the product quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of die design and application, and in particular to a method for manufacturing a U-shaped part by using an upper bearing arm forging and bending die. Background Art

[0002] In recent years, with the development of lightweight automobiles, the use of aluminum alloys in vehicles has become increasingly higher, aluminum alloy forgings have been used in large quantities, and the proportion of aluminum alloys in automobile production will continue to increase.

[0003] However, contrary to the increasingly important position of aluminum alloys in the automotive industry, my country's aluminum alloy forging industry currently has a large gap with the advanced foreign level in terms of technical equipment, mold design, product quality and large-scale production of products, and is unable to meet the production needs of the domestic market. Therefore, the present invention is of significant significance for improving the level of aluminum alloy forging technology. Summary of the invention

[0004] In view of the above problems, the present invention provides a method for manufacturing a U-shaped part by using an upper bearing arm forging bending die to solve the problem that the current forging equipment and technical level are backward and cannot meet production needs.

[0005] To achieve the above object, the present invention provides a method for manufacturing a U-shaped part by using an upper bearing arm forging bending die, comprising the following steps:

[0006] S1 mold design and molding:

[0007] S1-1 Rough forming of mold: Design the transitional part of the U-shaped part according to the structure of the U-shaped part, design the configuration of the upper bearing arm mold, and analyze the U-shaped part and its transitional part in sections according to the appearance requirements of the U-shaped part and its transitional part, especially perform additional sectioning on the bending section of the U-shaped part and its transitional part, and calculate the cross-sectional area of ​​each section of the U-shaped part and its transitional part;

[0008] The configuration of the first press-bending die is designed according to the structure of the U-shaped transition product. According to the cross-sectional area of ​​each segment of the U-shaped transition product, the volume of the upper die and the lower die of the first press-bending die is allocated through difference calculation, and the structural modeling of the upper die and the lower die is designed in detail to make the structure of the upper die and the lower die of the first press-bending die match the structure of the U-shaped transition product.

[0009] The configuration of the second bending die is designed according to the structure of the U-shaped part. The lower die structure of the second bending die is preliminarily constructed according to the structure of the first bending die. According to the cross-sectional areas of each segmented section of the U-shaped part, the volume of the upper die and the lower die of the second bending die is distributed through difference calculation. The structural modeling of the upper die and the lower die is further designed in detail to make the structures of the upper die and the lower die of the second bending die match the structure of the U-shaped part.

[0010] According to the configuration design, the mold is initially processed and formed using a wire cutting machine;

[0011] S1-2 Die finishing: Place the U-shaped blank and the U-shaped transition product on the first bending die and the second bending die respectively, adjust the structural shapes of the first bending die and the second bending die, and use a machining center to finish the die until the U-shaped blank and the U-shaped transition product can always be stably placed on the first bending die and the second bending die respectively when the upper die and the lower die of the first bending die and the second bending die are closed;

[0012] S2 U-shaped parts processing:

[0013] S2-1 Raw material preparation: Cut the raw materials according to specifications and heat the cut raw materials using an electric furnace;

[0014] S2-2 Roll forging: Roll forging the heated raw materials step by step, stretching and drawing the raw materials to form U-shaped blanks with a cross section corresponding to the U-shaped product;

[0015] S2-3 Press bending: The U-shaped blank after roll forging is placed in the first press bending die to form a U-shaped transition product, and the U-shaped transition product is placed in the second press bending die to form a U-shaped rough finished product;

[0016] S2-4 Forging: Place the rough U-shaped part in an electric furnace for constant heating, spray a release agent into the forging die to lubricate the die surface, place the rough U-shaped part in the forging die for forging, place the forged rough U-shaped part in a trimming die, cut off the waste outside the rough U-shaped part, and obtain a U-shaped part.

[0017] Furthermore, the included angles of the lower dies of the first press-bending die and the second press-bending die are 110° and 17° respectively, and the closing heights of the first press-bending die and the second press-bending die are both 440 mm.

[0018] Furthermore, in step S2-1, the heating temperature is 470-490°C, and the insulation time is determined according to the diameter of the raw material. For every 1.5 mm increase in the diameter of the raw material, the insulation time increases by 1 min.

[0019] Furthermore, in the roll forging of step S2-2, the roll forging process is divided into four steps, the total length of the four steps is 660 mm, and the lengths of the four steps are 455 mm, 510 mm, 590 mm and 660 mm respectively.

[0020] Furthermore, in the forging step S2-4, the heating temperature of the rough U-shaped product is maintained at 470-490°C, and the forging die temperature is 200-230°C.

[0021] Beneficial effects of the present invention:

[0022] The present invention provides two bending dies, and the two bending dies can be used to quickly perform two bending and forging operations on the raw materials, so that the U-shaped product can be quickly formed, the production efficiency is improved, the product quality is guaranteed, and the scale production level is improved;

[0023] The present invention utilizes the difference in surface area to perform configuration design of the press-bending die, can accurately perform configuration design of the press-bending die, improves the compatibility of the press-bending die and the U-shaped part, and is beneficial to improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is a schematic diagram of the first bending die structure;

[0026] Figure 2 This is a schematic diagram of the second bending die structure;

[0027] Figure 3 It is a structural schematic diagram of a U-shaped transition product;

[0028] Figure 4 It is a structural schematic diagram of the U-shaped part. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In a specific embodiment of the present invention, Figures 1 to 4 As shown, a method for making a U-shaped part by using an upper bearing arm forging bending die comprises the following steps:

[0031] S1 mold design and molding:

[0032] S1-1 Rough forming of mold: Design the transitional part of the U-shaped part according to the structure of the U-shaped part, design the configuration of the upper bearing arm mold, and analyze the U-shaped part and its transitional part in sections according to the appearance requirements of the U-shaped part and its transitional part, especially perform additional sectioning on the bending section of the U-shaped part and its transitional part, and calculate the cross-sectional area of ​​each section of the U-shaped part and its transitional part;

[0033] The configuration of the first press-bending die is designed according to the structure of the U-shaped transition product. According to the cross-sectional area of ​​each segment of the U-shaped transition product, the volume of the upper die and the lower die of the first press-bending die is allocated through difference calculation, and the structural modeling of the upper die and the lower die is designed in detail to make the structure of the upper die and the lower die of the first press-bending die match the structure of the U-shaped transition product.

[0034] The configuration of the second bending die is designed according to the structure of the U-shaped part. The lower die structure of the second bending die is preliminarily constructed according to the structure of the first bending die. According to the cross-sectional areas of each segmented section of the U-shaped part, the volume of the upper die and the lower die of the second bending die is distributed through difference calculation. The structural modeling of the upper die and the lower die is further designed in detail to make the structures of the upper die and the lower die of the second bending die match the structure of the U-shaped part.

[0035] According to the configuration design, the mold is initially processed and formed using a wire cutting machine;

[0036] S1-2 Die finishing: Place the U-shaped blank and the U-shaped transition product on the first bending die and the second bending die respectively, adjust the structural shapes of the first bending die and the second bending die, and use a machining center to finish the die until the U-shaped blank and the U-shaped transition product can always be stably placed on the first bending die and the second bending die respectively when the upper die and the lower die of the first bending die and the second bending die are closed;

[0037] The included angles of the lower dies of the first bending die and the second bending die are 110° and 17° respectively, and the closing heights of the first bending die and the second bending die are both 440 mm.

[0038] S2 U-shaped parts processing:

[0039] S2-1 Raw material preparation: Cut the raw materials according to the specifications and heat the cut raw materials in an electric furnace; the heating temperature is 470-490°C, and the insulation time is determined according to the diameter of the raw materials. For every 1.5mm increase in the diameter of the raw materials, the insulation time increases by 1min.

[0040] S2-2 Roll Forging: The heated raw materials are roll-forged step by step, and the raw materials are stretched and stretched to form U-shaped blanks with cross-sections corresponding to those of U-shaped products; the roll forging process is divided into four steps, and the total length of the four steps is 660mm, and the lengths of the four steps are 455mm, 510mm, 590mm and 660mm respectively.

[0041] S2-3 Press bending: The U-shaped blank after roll forging is placed in the first press bending die to form a U-shaped transition product, and the U-shaped transition product is placed in the second press bending die to form a U-shaped rough finished product;

[0042] S2-4 Forging: Place the rough U-shaped part in an electric furnace for constant heating at a temperature of 470-490°C, spray a release agent into the forging die to lubricate the die surface, place the rough U-shaped part in the forging die for forging, and place the forged rough U-shaped part in a trimming die to cut off the waste outside the rough U-shaped part to obtain a U-shaped part.

[0043] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for making a U-shaped part by using an upper bearing arm forging bending die, characterized in that: The steps include: S1 mold design and molding: S1-1 Rough forming of mold: Design the transitional part of the U-shaped part according to the structure of the U-shaped part, design the configuration of the upper bearing arm mold, and analyze the U-shaped part and its transitional part in sections according to the appearance requirements of the U-shaped part and its transitional part, especially perform additional sectioning on the bending section of the U-shaped part and its transitional part, and calculate the cross-sectional area of ​​each section of the U-shaped part and its transitional part; The configuration of the first press-bending die is designed according to the structure of the U-shaped transition product. According to the cross-sectional area of ​​each segment of the U-shaped transition product, the volume of the upper die and the lower die of the first press-bending die is allocated through difference calculation, and the structural modeling of the upper die and the lower die is designed in detail to make the structure of the upper die and the lower die of the first press-bending die match the structure of the U-shaped transition product. The configuration of the second bending die is designed according to the structure of the U-shaped part. The lower die structure of the second bending die is preliminarily constructed according to the structure of the first bending die. According to the cross-sectional areas of each segmented section of the U-shaped part, the volume of the upper die and the lower die of the second bending die is distributed through difference calculation. The structural modeling of the upper die and the lower die is further designed in detail to make the structures of the upper die and the lower die of the second bending die match the structure of the U-shaped part. According to the configuration design, the mold is initially processed and formed using a wire cutting machine; S1-2 Die finishing: Place the U-shaped blank and the U-shaped transition product on the first bending die and the second bending die respectively, adjust the structural shapes of the first bending die and the second bending die, and use a machining center to finish the die until the U-shaped blank and the U-shaped transition product can always be stably placed on the first bending die and the second bending die respectively when the upper die and the lower die of the first bending die and the second bending die are closed; S2 U-shaped parts processing: S2-1 Raw material preparation: Cut the raw materials according to specifications and heat the cut raw materials using an electric furnace; S2-2 Roll forging: Roll forging the heated raw materials step by step, stretching and drawing the raw materials to form U-shaped blanks with a cross section corresponding to the U-shaped product; S2-3 Press bending: The U-shaped blank after roll forging is placed in the first press bending die to form a U-shaped transition product, and the U-shaped transition product is placed in the second press bending die to form a U-shaped rough finished product; S2-4 Forging: Place the rough U-shaped part in an electric furnace for constant heating, spray a release agent into the forging die to lubricate the die surface, place the rough U-shaped part in the forging die for forging, place the forged rough U-shaped part in a trimming die, cut off the waste outside the rough U-shaped part, and obtain a U-shaped part.

2. A method for making a U-shaped part using an upper bearing arm forging and bending die according to claim 1, characterized in that: The included angles of the lower dies of the first bending die and the second bending die are 110° and 17° respectively, and the closing heights of the first bending die and the second bending die are both 440 mm.

3. The method for making a U-shaped part by using an upper bearing arm forging and bending die according to claim 1, characterized in that: In step S2-1, in raw material preparation, the heating temperature is 470-490°C, and the insulation time is determined according to the diameter of the raw material. For every 1.5 mm increase in the diameter of the raw material, the insulation time increases by 1 min.

4. The method for making a U-shaped part by using an upper bearing arm forging and bending die according to claim 1, characterized in that: In step S2-2 roll forging, the roll forging process is divided into four steps, the total length of the four steps is 660 mm, and the lengths of the four steps are 455 mm, 510 mm, 590 mm and 660 mm respectively.

5. A method for making a U-shaped part by using an upper bearing arm forging bending die according to claim 1, characterized in that: In step S2-4 forging, the U-shaped rough product is heated at a holding temperature of 470-490°C, and the forging die temperature is 200-230°C.

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