A method for room temperature deep drawing of a thin titanium TC1 alloy convex curvature bulkhead

Abstract

The application discloses a thin titanium TC1 alloy convex curvature diaphragm room temperature deep drawing forming method, comprising the following steps: constructing a basin-shaped symmetric piece theoretical model in a CAD environment; establishing a basin-shaped symmetric piece expanded blank in finite element simulation software; determining a deep drawing die structure in the CAD environment, wherein the deep drawing die structure comprises a convex die, a concave die and a blank holder; deep drawing forming; and annealing and correcting shape. The method reduces a large amount of trial and error cost, solves the manufacturing method limited by titanium alloy hot forming, reduces the processing cycle of the hot forming die and the titanium alloy hot forming, saves manufacturing cost, and has high popularization value. The deep drawing forming method has high universality, can be used for reference of forming of thin-wall TC1 titanium alloy convex curvature parts, and has stable product quality and low dependence on operator technical level.

Description

Technical Field

[0001] This invention relates to a sheet metal parts forming technology in the field of aircraft manufacturing, specifically a room temperature forming method for thin-walled titanium alloy and convex curvature flange partition parts, which is particularly suitable for cold deep drawing of thin-walled parts made of TC1 material. Background Technology

[0002] In the development of new aircraft, the application of thin titanium alloys is becoming increasingly widespread due to the demand for lightweight, corrosion-resistant, and high-temperature resistant products. Titanium alloys exhibit high resistance to cold forming deformation, low forming limits, and severe springback warping. Their high yield strength ratio restricts cold forming processes to simple corner pieces and gently curving skin-like parts. Research into forming processes for complex surface parts is crucial for reducing the manufacturing cost of titanium alloy structural components.

[0003] TC1 titanium alloy is a low-alloyed (α+β) two-phase titanium alloy with good processing plasticity, weldability, and thermal stability. The tensile strength σ of thin TC1-M state material is... b With a strength of 600-750 MPa, the material's deformation resistance is approximately 8-10 times that of 2A12-O aluminum alloy. It is difficult to form at room temperature; therefore, over 90% of titanium alloy sheet metal parts are manufactured using hot forming processes. Hot forming utilizes heating to soften the metal material, reducing the sheet's deformation resistance, increasing the degree of deformation achievable during forming, and minimizing elastic rebound.

[0004] The aircraft's mounting area is equipped with a series of thin-walled TC1 fireproof baffles, featuring a typical convex curvature flange structure. The material is TC1-M, with a thickness ranging from 0.4 to 0.8 mm, a convex curvature radius close to R100 mm, and a flange height ≤30 mm. Previously, TC1 fireproof baffles were formed using thermoforming, requiring up to seven forming steps. This resulted in noticeable wrinkles at the bends, uneven web surfaces, unsatisfactory forming quality, and low production efficiency. Titanium alloy thermoforming dies have long heating and cooling cycles, complex temperature control processes, and cumbersome protective measures, leading to high manufacturing costs and difficulty in implementing restrictions during the material forming process.

[0005] If TC1 fireproof partitions with convex curvature are directly cold-pressed, the blank material in the curved area will wrinkle due to excessive shrinkage deformation during the forming process. The greater the curvature, the higher the wrinkle peaks, and the wrinkles cannot be repaired. The elongation of TC1-M state material is 25%, approximately twice that of domestic hard aluminum alloys. Utilizing the good ductility of TC1, the flanging deformation method is changed, optimizing the edge-forming process to an edge-releasing process. This avoids the sensitive defect of irreparable wrinkling in titanium plates. At the same time, an effective annealing process is incorporated to eliminate internal stress during forming, enabling room temperature deep drawing of thin titanium TC1 fireproof partitions. Summary of the Invention

[0006] To address the challenges of controlling the quality, long manufacturing cycle, and high cost of hot forming thin titanium TC1 alloy fireproof partitions with convex curvature, as well as the irreparable instability and wrinkling during cold forming, this invention aims to provide a room temperature deep drawing method for thin titanium TC1 alloy convex curvature partitions, specifically comprising the following steps:

[0007] Step 1: Construct a theoretical model of a basin-shaped symmetrical component in the CAD environment;

[0008] 1: Place the left and right partitions symmetrically, with a smooth transition between them, forming a closed box-shaped structure. This creates the bottom and side walls of the box structure. The curved outlines of the left and right partitions combine to form the opening line of the box structure. The distance between the left and right partitions... The length-to-width ratio of the outer contour of the box structure it creates The ratio of 1 ≤ m ≤ 4:3 is satisfied, and the material thicknesses of the left and right partitions are... ;

[0009] 2: Extend the opening line of the box-shaped structure along the side wall of the box-shaped structure to obtain an elongated box-shaped component with increased height. Then, translate the opening line of the box-shaped structure downwards along the side wall of the elongated box-shaped component. The inner profile of the side wall of the basin-shaped part is obtained. Then, the inner profile of the side wall of the basin-shaped part is translated downwards along the side wall of the extended box-shaped part by a translation distance of... Satisfy the formula The inner edge line of the flange of the basin-shaped part is obtained;

[0010] 3: Draw an extension surface for the basin-shaped flange along its inner edge, ensuring its curvature matches the curvature of the box-shaped structure's bottom surface. This extension surface divides the elongated box-shaped component into two parts. The side with the box-shaped structure's bottom surface is taken as the effective box-shaped component. Remove the area enclosed by the inner edge of the basin-shaped flange within the extension surface, resulting in an annular widened surface for the basin-shaped flange. Connect the widened surface and the effective box-shaped component using a transition fillet surface to form a transition basin-shaped component, thus obtaining the transition fillet termination line and the fillet radius of the transition fillet surface. ;

[0011] 4: The transition fillet termination line is offset outwards at an equal distance along the widened surface of the basin-shaped flange, with an offset distance of [missing information]. , The outer edge line of the basin-shaped flange is obtained, which divides the transition basin-shaped part into two parts. The side with the box-shaped bottom surface is taken as the basin-shaped symmetrical part. The basin-shaped symmetrical part is a transition process part containing the forming surfaces of the left and right partitions.

[0012] Step 2: Create a basin-shaped symmetrical part development blank using finite element simulation software;

[0013] 1: The theoretical unfolded blank shape of the basin-shaped symmetrical part is calculated using the blank back calculation function of finite element simulation software, and the outer edge line of the unfolded blank is obtained;

[0014] 2: Denote the radius of the point where the curvature of the outer edge of the unfolded blank of the basin-shaped symmetrical part is the maximum. The radius of curvature of the inner edge of the flange of the basin-shaped part corresponding to the point of maximum curvature of the outer edge of the unfolded blank is denoted as . The ultimate drawing ratio of basin-shaped symmetrical parts Through coordination and Ultimately .

[0015] Step 3: Determine the drawing die structure in the CAD environment. The drawing die structure includes a punch, a die, and a blank holder.

[0016] 1: The working surface of the punch in the deep drawing die is cylindrical, consistent with the effective box-shaped part shape of the basin-shaped symmetrical part. A diameter is set at the center of the top of the punch. The vent is used to expel air from the closed cavity during forming, so that the unfolded blank can better fit the working surface of the die.

[0017] 2: The working surface of the drawing die is consistent with the shape of the basin-shaped symmetrical part. The working surface of the die includes four parts: the box-shaped bottom surface, the columnar side wall surface, the die corner surface, and the die flange surface. The gap between the box-shaped bottom surface and the box-shaped bottom surface of the basin-shaped symmetrical part is... The gap between the columnar sidewall and the box-shaped sidewall of the basin-shaped symmetrical component The gap between the corner surface of the die cavity and the transition fillet surface of the basin-shaped symmetrical part The gap between the concave flange face and the annular flange face of the basin-shaped symmetrical part The four main components of the die working surface are smoothly transitioned.

[0018] 3: The working surface of the pressure ring is consistent with the shape of the annular flange of the basin-shaped symmetrical part. The outer dimensions of the pressure ring match the flange of the die. The outer edge line of the unfolded blank is marked on the pressure ring for visual positioning before deep drawing.

[0019] Step 4: Deep drawing;

[0020] 1: Before forming, assemble the punch and blank holder and install them on the lower bed of the machine tool. Install the die on the corresponding position on the upper bed of the machine tool. Lubricate the side of the blank that contacts the die and the corner of the die. Lubricate the area of ​​the blank that contacts the blank. Place the blank on the working surface of the blank holder according to the outer edge line of the blank on the blank holder. The punch, die, and blank holder are controlled by the guide grooves and guide plates on both sides to control the drawing direction.

[0021] 2: Forming begins. The die moves downward and touches the blank holder. The die and blank holder clamp and unfold the blank, which continues to move downward. Under the combined action of blank holder force and drawing force, the outer edge of the unfolded blank shrinks and gradually forms the box-shaped symmetrical part with box-shaped sidewalls and rounded corners of the die according to the working surfaces of the punch and die. The unit blank holder force is more than twice that of aluminum alloy.

[0022] Step 5: Annealing and shaping.

[0023] 1: After deep drawing, the basin-shaped symmetrical part is initially cut into left and right partitions according to the drawings. The left and right partitions are then subjected to stress-relieving annealing at a temperature of 520~580°.

[0024] 2: Trim the shape of the left and right partitions and complete the excess cutting to obtain titanium alloy partition parts with the required shape tolerances.

[0025] The beneficial effects of this invention are as follows: 1) This method provides a design method for the transition structure of a cold-forming thin titanium convex curvature partition. Utilizing the good ductility of TC1, a symmetrical deep-drawn body with a cavity structure is designed, realizing the deep-drawing of two TC1 convex curvature partitions in a single mold, which has significant practical value. 2) The design clearance of this new mold is specified, facilitating the flow of titanium alloy material. The installation and operation of the new mold are the same as traditional molds, making it easy to promote and implement. 3) This method reduces significant trial-and-error costs, solves the manufacturing limitations imposed by titanium alloy hot forming methods, reduces the processing cycle of hot forming molds and titanium alloy hot forming, and saves expensive manufacturing costs, thus having high promotional value. 4) This deep-drawing method is highly versatile, can draw upon the forming of thin-walled TC1 titanium alloy convex curvature parts, has stable product quality, and has low dependence on the operator's technical level.

[0026] The present application will be further described in detail below with reference to the accompanying drawings of the embodiments. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the titanium alloy left and right partition structures.

[0028] Figure 2 This is a schematic diagram of the extended box-shaped component structure.

[0029] Figure 3 This is a schematic diagram of the transition basin-shaped component structure.

[0030] Figure 4 This is a schematic diagram of the basin-shaped symmetrical component and the unfolded blank structure.

[0031] Figure 5 This is a schematic diagram of the assembly relationship of the cross-sectional structure of the punch, pressure ring, and basin-shaped symmetrical parts.

[0032] Figure 6 This is a schematic diagram of the assembly relationship between the die cavity and the symmetrical basin-shaped parts.

[0033] Numbering in the diagram: 1 Left partition, 2 Right partition, 3 Bend outline, 4 Box structure, 5 Box structure opening line, 6 Box structure bottom surface, 7 Box structure side wall, 8 Extended box component, 9 Inner profile line of side wall of basin-shaped component, 10 Inner edge line of flange of basin-shaped component, 11 Extended surface of flange of basin-shaped component, 12 Widened surface of flange of basin-shaped component, 13 Effective box component, 14 Transition fillet surface, 15 Transition basin-shaped component, 16 Transition fillet termination line, 17 Outer edge line of flange of basin-shaped component, 18 Symmetrical basin-shaped component, 19 Annular flange surface, 20 Unfolded blank, 21 Outer edge line of unfolded blank, 22 Punch, 23 Vent hole, 24 Pressure ring, 25 Die, 26 Box bottom surface, 27 Columnar side wall surface, 28 Corner surface of die, 29 Die flange surface Detailed Implementation

[0034] Referring to the accompanying drawings, the aircraft parts provided in the embodiments are as follows: Figure 1 As shown, the part is a thin titanium TC1 convex curvature fireproof partition 1 and 2. The biggest problem with existing technology—titanium alloy hot forming—is the long manufacturing cycle, high production cost, and the inability to intervene once defects occur in the hot forming process.

[0035] like Figures 2-6 As shown, a method for room temperature deep drawing of a thin titanium TC1 alloy convex curvature partition includes the following steps:

[0036] Step 1: Construct a theoretical model of a basin-shaped symmetrical component in the CAD environment.

[0037] Step 1-1: Place the left partition 1 and right partition 2 symmetrically, with a smooth transition between them, forming a closed box structure 4, resulting in the bottom surface 6 and side walls 7 of the box structure. The curved outlines 3 of the left and right partitions 1 and 2 combine to form the opening line 5 of the box structure. The distance between the left partition 1 and right partition 2... The design principle should meet the aspect ratio of the outer contour of the newly created box-shaped structure. The ratio of 1 ≤ m ≤ 4:3 is satisfied, and the material thicknesses of the left partition 1 and right partition 2 are: ;

[0038] Steps 1-2: Extend the box-shaped structure opening line 5 along the side wall 7 of the box-shaped structure to obtain an elongated box-shaped component 8 with increased height. Then, translate the box-shaped structure opening line 5 downwards along the side wall of the elongated box-shaped component 8. The inner profile line 9 of the side wall of the basin-shaped part is obtained. Then, the inner profile line of the side wall of the basin-shaped part is translated downwards along the side wall of the extended box-shaped part by a translation distance of... Satisfy the formula The inner edge line 10 of the basin-shaped flange is obtained;

[0039] Steps 1-3: Draw the extension surface 11 of the basin-shaped flange through the inner edge line 10, making its curvature consistent with the curvature of the bottom surface 6 of the box-shaped structure. The extension surface 11 of the basin-shaped flange divides the extended box-shaped part 8 into two parts. The side with the bottom surface 6 of the box-shaped structure is taken as the effective box-shaped part 13. Remove the area enclosed by the inner edge line 10 of the basin-shaped flange within the extension surface 11 of the basin-shaped flange to obtain the widened surface 12 of the annular basin-shaped flange. Connect the widened surface 12 of the basin-shaped flange and the effective box-shaped part 13 through the transition fillet surface 14 to form the transition basin-shaped part 15, obtaining the transition fillet termination line 16. The fillet radius of the transition fillet surface is... ;

[0040] Steps 1-4: The transition fillet termination line 16 is offset outwards at equal intervals along the widened surface 12 of the basin-shaped flange, with an offset distance of [missing information]. , The outer edge line 17 of the basin-shaped flange is obtained. The outer edge line of the basin-shaped flange divides the transition basin-shaped 15 into two parts. The side with the box-shaped bottom surface 6 is used as the basin-shaped symmetrical part 18. The basin-shaped symmetrical part 18 is a transition process part containing the forming surfaces of the left partition 1 and the right partition 2.

[0041] Step 2: Create a basin-shaped symmetrical part development blank 20 using finite element simulation software.

[0042] Step 2-1: Calculate the theoretical unfolded blank shape of the basin-shaped symmetrical part 18 using the blank back calculation function of finite element simulation software, and obtain the outer edge line 21 of the unfolded blank;

[0043] Step 2-2: Unfold the symmetrical basin-shaped part 18. The radius at the point of maximum curvature of the outer edge line 21 is denoted as... The radius of curvature of the inner edge line 10 of the basin-shaped flange corresponding to the point of maximum curvature of the outer edge line 21 of the unfolded blank of the basin-shaped symmetrical part 18 is denoted as... 18-inch deep drawing ratio for symmetrical basin-shaped parts Through coordination and Ultimately ;

[0044] Step 3: Determine the drawing die structure in the CAD environment. This drawing die structure includes a punch 22, a die 25, and a blank holder 24.

[0045] Step 3-1: The working surface of the punch 22 of the deep drawing die is designed according to the effective box-shaped part 13 of the basin-shaped symmetrical part 18. The working surface of the punch 22 of the deep drawing die is consistent with the effective box-shaped part 13 and is columnar. A diameter is set at the center of the top of the punch 22. The vent 23 is used to expel air from the closed cavity during forming, so that the unfolded blank 20 can better fit the working surface of the die 25.

[0046] Step 3-2: The working surface of the drawing die 25 is designed based on the structure of the basin-shaped symmetrical part 18. The working surface of the die includes four parts: the box-shaped bottom surface 26, the columnar side wall surface 27, the die corner surface 28, and the die flange surface 29. The gap between the box-shaped bottom surface 26 and the box-shaped bottom surface 6 of the basin-shaped symmetrical part 18 is... According to the formula The design includes the gap between the columnar sidewall 27 and the box-shaped structural sidewall 7 of the basin-shaped symmetrical member 18. According to the formula The design includes the gap between the corner surface 28 of the die cavity and the transition fillet surface 14 of the basin-shaped symmetrical part 18. According to the formula The design specifies the gap between the concave flange face 29 and the annular flange face 19 of the basin-shaped symmetrical member 18. According to the formula The design features smooth transitions between the four main components of the 25mm working surface of the die.

[0047] Step 3-3: The working surface of the pressure ring 24 is designed based on the annular flange surface 19 of the basin-shaped symmetrical part 18. The outer dimensions of the pressure ring 24 match the flange surface 29 of the die. The outer edge line 21 of the unfolded blank is marked on the working surface of the pressure ring 24 for visual positioning before deep drawing.

[0048] Step 4: Deep drawing

[0049] Step 4-1: Before forming, assemble the punch 22 and the blank holder 24 and install them on the lower surface of the machine tool. Install the die 25 on the corresponding position on the upper surface of the machine tool. Lubricate the contact surface between the unfolded blank 20 and the die 25, as well as the corner surface 28 of the die. Lubricate the contact area between the unfolded blank 20 and the blank holder 24. Place the unfolded blank 20 on the working surface of the blank holder 24 according to the outer edge line 21 of the unfolded blank on the blank holder 24. The punch 22, die 25, and blank holder 24 control the drawing direction through the guide grooves and guide plates on both sides.

[0050] Step 4-2: Forming begins. The die 25 moves downward and touches the blank holder 24. The die 25 and the blank holder 24 clamp the unfolded blank 20 and continue to move downward. Under the combined action of blank holder force and drawing force, the outer edge of the unfolded blank 20 shrinks and gradually forms the box-shaped side wall 7 of the basin-shaped symmetrical part 18 and the corner surface 28 of the die 25 according to the working surface of the punch 22 and the die 25. Since titanium alloy has high yield strength, the unit blank holder force is large, usually more than twice that of aluminum alloy.

[0051] Step 5: Annealing and Shaping

[0052] Step 5-1: Cut the deep-drawn basin-shaped symmetrical part 18 into a left partition 1 and a right partition 2 according to the drawing. Perform stress-relieving annealing on the left partition 1 and the right partition 2 at a temperature of 520~580° to eliminate the internal stress during the deep drawing process of the basin-shaped symmetrical part 18.

[0053] Step 5-2: Trim the shape of the left partition 1 and right partition 2 according to the drawing requirements, and complete the allowance cutting to obtain titanium alloy partition parts with shape tolerances that meet the document requirements.

[0054] Three points need to be explained: This deep drawing method for titanium alloy partitions is also applicable to the forming of TB5 materials with a thickness between 0.4mm and 0.8mm; if the material flow is not smooth during the deep drawing process, a thin aluminum plate can be placed on the non-unfolded blank area of ​​the blank holder to increase the amount of titanium alloy feed, depending on the situation.

Claims

1. A method for room temperature deep drawing of a thin titanium TC1 alloy convex curvature partition, characterized in that... Includes the following steps: Step 1: Using TC1 titanium alloy sheet with a thickness t of 0.4~0.8mm as raw material, construct a theoretical model of a basin-shaped symmetrical part in the CAD environment. The basin-shaped symmetrical part is formed by symmetrically placing the left and right partitions, smoothly transitioning to form a closed box structure, and then increasing, translating, extending, and offsetting. The basin-shaped symmetrical part is a transitional process part containing the forming surfaces of the left and right partitions. Step 2: Create a basin-shaped symmetrical part development blank using finite element simulation software; Step 3: Determine the drawing die structure in the CAD environment. The drawing die structure includes a punch, a die, and a blank holder. Step 4: Deep drawing; Step 5: Annealing and shaping.

2. The method for room temperature deep drawing of a thin titanium TC1 alloy convex curvature partition according to claim 1, characterized in that... Step 1: Construct a theoretical model of a basin-shaped symmetrical component in the CAD environment. The specific process is as follows: 2-1: Place the left and right partitions symmetrically, with a smooth transition between them, forming a closed box structure. This creates the bottom and sidewalls of the box structure. The curved outlines of the left and right partitions combine to form the opening line of the box structure. The distance d between the left and right partitions ensures that the aspect ratio m of the outer contour of the created box structure conforms to 1 ≤ m ≤ 4:

3. The material thickness of the left and right partitions is... ; 2-2: Extend the opening line of the box-shaped structure along the side wall of the box-shaped structure to obtain an elongated box-shaped component with increased height. Then, translate the opening line of the box-shaped structure downwards along the side wall of the elongated box-shaped component. The inner profile of the side wall of the basin-shaped part is obtained. Then, the inner profile of the side wall of the basin-shaped part is translated downwards along the side wall of the extended box-shaped part by a translation distance of... Satisfy the formula The inner edge line of the flange of the basin-shaped part is obtained; 2-3: Draw an extension surface for the basin-shaped flange through its inner edge, ensuring its curvature matches the curvature of the bottom surface of the box-shaped structure. This extension surface divides the elongated box-shaped component into two parts. The side with the bottom surface of the box-shaped structure is taken as the effective box-shaped component. Remove the area enclosed by the inner edge of the basin-shaped flange within the extension surface, resulting in a widened annular basin-shaped flange surface. Connect the widened surface and the effective box-shaped component using a transition fillet surface to form a transition basin-shaped component, thus obtaining the transition fillet termination line. The radius of the transition fillet surface is... ; 2-4: The transition fillet termination line is offset outward at equal distances along the widened surface of the basin-shaped flange, with an offset distance of n, n = 5~10mm, to obtain the outer edge line of the basin-shaped flange. The outer edge line of the basin-shaped flange divides the transition basin-shaped part into two parts, with the side with the box-shaped bottom surface as the symmetrical part of the basin.

3. The method for room temperature deep drawing of a thin titanium TC1 alloy convex curvature partition according to claim 1, characterized in that... Step 2: Create a basin-shaped symmetrical part development blank using finite element simulation software. The specific process is as follows: 3-1: The theoretical unfolded blank shape of the basin-shaped symmetrical part was calculated using the blank back calculation function of finite element simulation software, and the outer edge line of the unfolded blank was obtained; 3-2: The radius of the point where the curvature of the outer edge of the unfolded blank of the basin-shaped symmetrical part is the maximum is denoted as... The radius of curvature of the inner edge of the flange of the basin-shaped part corresponding to the point of maximum curvature of the outer edge of the unfolded blank is denoted as . The ultimate drawing ratio of basin-shaped symmetrical parts Through coordination and Ultimately .

4. The method for room temperature deep drawing of a thin titanium TC1 alloy convex curvature partition according to claim 1, characterized in that... Step 3: Determine the drawing die structure in the CAD environment. This drawing die structure includes a punch, a die, and a blank holder. The specific process is as follows: 4-1: The working surface of the punch in the deep drawing die is cylindrical, consistent with the effective box-shaped part shape of the basin-shaped symmetrical part. A diameter is set at the center of the top of the punch. The vent is used to expel air from the closed cavity during forming, so that the unfolded blank can better fit the working surface of the die. 4-2: The working surface of the drawing die is consistent with the shape of the basin-shaped symmetrical part. The working surface of the die includes four parts: the box-shaped bottom surface, the columnar side wall surface, the die corner surface, and the die flange surface. The gap between the box-shaped bottom surface and the box-shaped bottom surface of the basin-shaped symmetrical part is... The gap between the columnar sidewall and the box-shaped sidewall of the basin-shaped symmetrical component The gap between the corner surface of the die cavity and the transition fillet surface of the basin-shaped symmetrical part The gap between the concave flange face and the annular flange face of the basin-shaped symmetrical part The four main components of the die working surface are smoothly transitioned. 4-3: The working surface of the pressure ring is consistent with the shape of the annular flange of the basin-shaped symmetrical part. The outer dimensions of the pressure ring match the flange of the die. The outer edge line of the unfolded blank is marked on the pressure ring for visual positioning before deep drawing.

5. The method for room temperature deep drawing of a thin titanium TC1 alloy convex curvature partition according to claim 1, characterized in that... Step 4, deep drawing, is as follows: 5-1: Before forming, assemble the punch and blank holder and install them on the lower bed of the machine tool. Install the die on the corresponding position on the upper bed of the machine tool. Lubricate the side of the blank that contacts the die and the corner of the die. Lubricate the area of ​​the blank that contacts the blank. Place the blank on the working surface of the blank holder according to the outer edge line of the blank on the blank holder. The punch, die, and blank holder are controlled by the guide grooves and guide plates on both sides to control the drawing direction. 5-2: Forming begins. The die moves downward and touches the blank holder. The die and blank holder clamp and unfold the blank, which continues to move downward. Under the combined action of blank holder force and drawing force, the outer edge of the unfolded blank shrinks and gradually forms the box-shaped structure sidewall and the rounded corner surface of the die according to the working surfaces of the punch and die. The unit blank holder force is more than twice that of aluminum alloy.

6. The method for room temperature deep drawing of a thin titanium TC1 alloy convex curvature partition according to claim 1, characterized in that... Step 5, annealing and shaping, is carried out as follows: Step 5-1: After deep drawing, the basin-shaped symmetrical part is initially cut into left and right partitions according to the drawings. The left and right partitions are then subjected to stress-relieving annealing at a temperature of 520~580°. Step 5-2: Trim the shape of the left and right partitions and complete the excess cutting to obtain titanium alloy partition parts with the required shape tolerances.

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