A one-time forming mold for an R-shaped latch and its processing technology

Abstract

This invention discloses a one-time forming mold for an R-shaped buckle and its processing technology, which produces an arc segment and an inner bend at the end of the arc segment in one step, with high bending accuracy for the inner bend. The solution includes a lower mold base, on which a lower mold body is rotatably mounted. A spring connects the lower mold body and the lower mold base. A lower arc forming area is provided on the lower mold body, with its top extending inward to form a bending sharp angle. By rotating the lower mold body relative to the lower mold base, the lower mold body utilizes the bending sharp angle to form the inner bend in one step when forming the arc segment of the irregular buckle, achieving high forming accuracy.

Description

Technical Field

[0001] This invention relates to the technical field of locking mold forming molds, and in particular to a special one-time forming mold for R-shaped locking that can achieve one-time forming of arcs and inner corners with high forming accuracy, the mold processing technology, and the locking forming process. Background Technology

[0002] A latch is an object used to fasten two items together. As shown in the figure, the irregularly shaped latch has an inwardly concave angle at the end of its arc segment. A search of patent technologies related to arc forming, such as CN210305161U—a right-angle arc mold for a bending machine—involves a lower mold base and an upper mold base. The lower mold base has an arc forming groove welded to its inner bottom wall. A support block is located on the right side of the arc forming groove, and a transverse rod is welded to the left wall of the support block. One side of the transverse rod penetrates the arc forming groove and the interior of the lower mold base, and the end of the transverse rod extends to the left side of the lower mold base and is fixedly connected to a pull block. The left wall of the lower mold base has a loading port. This technology can only process the arc segment and cannot produce the inner arc segment. The angle is bent in one step; CN113751543A -- A sheet metal arc bending method, including: preliminary work preparation: moving the upper and lower bending cutters along the X and Z axes to the first bending position, and resetting the upper pressure cutter, pressure claw mechanism, and straightedge mechanism to their initial positions; pre-bending feeding action: placing the workpiece in the reserved position on the worktable, clamping the workpiece by the straightedge mechanism, pressing down and fixing the workpiece by the pressure claw mechanism, then the straightedge mechanism descends to disengage from the clamp, and the upper and lower pressure claws pick up the workpiece and move it to the pressure cutter position, delivering it to the first bending position. This technology is similar.

[0003] In summary, because the aforementioned irregularly shaped buckle has a special inward bend (around 150°) at the end of the arc segment, it cannot be manufactured in one step if the above-mentioned method is used for processing. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies. Therefore, it proposes an R-shaped buckle one-time forming mold that can produce the arc segment and the inner folded corner at the end of the arc segment in one step, and the inner folded corner has high bending accuracy.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A one-time forming mold for an R-shaped latch includes a lower mold base, on which a lower mold body is rotatably mounted. A spring connects the lower mold body and the lower mold base. The lower mold body has a lower arc forming area, the top of which extends inward to form a bent sharp angle. By rotating the lower mold body relative to the lower mold base, the lower mold body utilizes the bent sharp angle to form the inner corner in one step when forming the arc segment of the irregularly shaped latch, achieving high forming accuracy.

[0007] It also includes an upper mold body, which has an upper arc forming area adapted to the lower arc forming area and an inner hook forming area that connects to the upper arc forming area and adapts to the bending angle. The lower mold base, lower mold body, and upper mold body are all covered with a Ti-xY wear-resistant alloy layer. The sheet metal is formed through the upper arc forming area of ​​the upper mold body. Because severe friction occurs between the upper mold body and the bending angle during the forming of the inner bend, the lower mold body will experience severe friction. If this area is not specially protected, inaccurate bending angles will inevitably occur. Due to severe friction areas between the lower mold base and the sheet metal in some areas, and the rotational friction between the lower mold body and the lower mold base during rotation, wear will inevitably occur over time, affecting accuracy. This alloy layer can help reduce wear resistance, reduce wear rate, and improve service life.

[0008] In the further technical solution described above, the lower mold base includes mold base one, mold base two, and mold base three. Mold base two and mold base three are bolted to the top of mold base one, and a limiting area for the lower mold body to rotate is formed between mold base two and mold base three. The limiting area formed by mold base two and mold base three ensures that the lower mold body can only rotate. Positioning washers are evenly distributed on both sets of bolts, and the area enclosed by the two sets of positioning washers is the sheet metal positioning area. The two positioning washers can accurately position the sheet metal to be bent, which is beneficial for subsequent operations by the operator and improves the forming efficiency of irregular-shaped buckles.

[0009] The lower mold body has a circular cross-section, with the lower arc forming area eccentrically positioned on it. Because of this eccentric positioning, the lower mold body rotates during the forming of the arc segment, allowing for precise bending of its inner corners using its sharp bends, thus completing the forming process in one step.

[0010] In the further technical solution described above, the outer surface of the upper arc forming area is composed of several segments of arc-shaped curved surfaces connected sequentially. Because the several segments of arc-shaped curved surfaces arranged on the upper arc forming area can disperse the stress direction of the sheet metal wrapped around this side along the radial direction in multiple short-distance segments, the formed irregular-shaped buckle has the advantages of low resilience and high precision. During the downward movement of the upper mold body, due to the anti-slip area provided on the outer surface, the initial contact point between the upper mold body and the sheet metal will not move relative to each other as the upper mold body moves downward.

[0011] In the further technical solution described above, the processing steps for the lower mold base, lower mold body, and upper mold body are as follows: The lower mold base, lower mold body, and upper mold body, made of 42CrMo steel, undergo nitriding followed by oxidation treatment. A deposition solution is prepared by mixing tetraethoxysilane, 25%–28% ammonia, pure water, and anhydrous ethanol at a ratio of 1:4–5:7–8:3–4. The heat-treated lower mold base, lower mold body, and upper mold body are placed in 25–35 times the volume of the deposition solution and ultrasonically reacted at 45–60 Hz for 2–4 hours. Then, 0.02–0.08 times the volume of tetraethoxysilane nano-yttrium oxide is added, and the reaction is repeated at 45–60 Hz. The mixture was subjected to ultrasonic reaction at 0 Hz for 2–4 hours. After removal, it was washed twice with 250 mL of pure water and twice with 180 mL of 95% ethanol. It was then dried at 85–95°C for 4–6 hours. Subsequently, it was placed in a reactor, and a vacuum was drawn to achieve a pressure of 3.5–4.5 MPa. 0.05–0.12 times the amount of gaseous titanium tetrachloride tetraethoxysilane was introduced, and the reactor temperature was raised to 330–350°C. The vacuum was drawn again to achieve a pressure of 3.5–4.5 MPa. Then, a mixed reducing gas was introduced until the pressure reached 75–95 MPa. The temperature of the lower mold base, lower mold body, and upper mold body was maintained at 800–1200°C, and deposition was carried out for 5–8 hours.

[0012] After nitriding and oxidation treatment of 42CrMo, the nitrided layer surface contains iron(III) oxide and possesses a certain degree of magnetism. A silicon solution is prepared using tetraethoxysilane, 25%–28% ammonia, pure water, and anhydrous ethanol in a specific ratio. Under ultrasonic reaction, a two-stage deposition process is performed. First, silicon dioxide is coated onto the outer surface of the iron(III) oxide through stable Si-O-Fe chemical bonds, forming an initial deposition layer. Then, yttrium oxide is introduced into the silicon solution, and due to the presence of stable Si-OY chemical bonds, a final deposition layer is formed, resulting in a porous silicon dioxide layer with yttrium doping on the nitrided layer surface. Finally, this porous, yttrium-doped silicon dioxide layer is deposited in a gaseous titanium tetrachloride atmosphere. In this process, titanium tetrachloride enters the porous silica and undergoes cross-linking, hydrolysis, and condensation reactions with its amino groups to form a titanium dioxide cross-linked network. Finally, it is reduced at high temperature in a methane-containing reducing atmosphere to form titanium carbide. Due to the doping of yttrium in the silica layer, during the formation of titanium carbide, yttrium can make the primary titanium carbide dendrites smaller, increase the dendrite spacing, and increase the number of slender eutectic titanium carbide to obtain ultrafine-grained titanium carbide. The ultrafine-grained titanium carbide has increased interfacial wettability at the yttrium-purified interface, allowing it to be uniformly dispersed in the silica layer and have a high density. When microcracks and residual stress are generated around the ultrafine-grained titanium carbide, it can pin the cracks and consume fracture energy, thereby improving the toughness of the coating material.

[0013] In a further technical solution described above, the mixed reducing gas includes one or more of hydrogen and silane in addition to methane. The addition of silane enables silicon carbide to be distributed within the titanium carbide crystals and achieves high density, while also resulting in binary and / or ternary eutectic phases.

[0014] A locking process for a one-piece R-shaped locking mold, the molding process steps are as follows:

[0015] First, place the board in the board positioning area composed of two positioning pads;

[0016] Subsequently, the upper mold body moves down and presses down on the sheet metal. As the sheet metal is pressed down and moves down, it is gradually bent and enters the area between mold base two and mold base three. As the upper mold body continues to move down, the left side and bottom of the upper arc forming area of ​​the lower mold body will first enter the lower arc forming area and initially form the arc segment and the straight segment on the left side of the workpiece. The upper mold body continues to move down, causing the lower mold body to rotate inside the limiting area. The lower arc forming area rotates downward with the upper mold body, forming the bottom of the arc segment of the workpiece. As the lower arc forming area moves down relative to the lower mold base and rotates, the bending tip rotates towards the inward hook forming area, applying pressure and bending the end of the arc segment of the workpiece. When both the upper and lower mold bodies have moved down to the bending end position, the workpiece is formed on the outside of the upper arc forming area and the inward hook forming area of ​​the upper mold body. After the upper mold body is reset, the workpiece can be removed along the width direction of the upper mold body.

[0017] In the further technical solution described above, during the downward movement of the upper mold body, due to the anti-slip area provided on the outer surface, the position where the upper mold body and the plate first come into contact will not move relative to each other as the upper mold body moves downward. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the overall structure of the molded workpiece after completion according to the present invention;

[0020] Figure 3 This is a schematic diagram of the overall structure of the lower mold base after the molded workpiece of the present invention is completed;

[0021] Figure 4 This is a schematic diagram of the overall structure of the lower mold body of the present invention;

[0022] Figure 5 This is a schematic diagram of the overall structure of the upper mold body of the present invention;

[0023] Figure 6 This is a partial enlarged view of the upper arc forming area of ​​the upper mold body of the present invention;

[0024] Figure 7 This is a schematic diagram of the irregular-shaped latch of the present invention.

[0025] In the diagram: 10. Lower mold base; 11. Mold base one; 12. Mold base two; 13. Mold base three; 14. Positioning pad; 20. Lower mold body; 30. Spring; 40. Lower arc forming area; 50. Bending sharp corner; 60. Upper mold body; 70. Upper arc forming area; 80. Inner hook forming area. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0027] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0028] Example 1: As Figures 1 to 6 As shown, an R-shaped buckle one-time forming mold includes a lower mold base 10, a lower mold body 20 is rotatably arranged on the lower mold base 10, a spring 30 is connected between the lower mold body 20 and the lower mold base 10, a lower arc forming area 40 is arranged on the lower mold body 20, and the top of the lower arc forming area 40 extends inward to form a bent sharp corner 50.

[0029] The lower mold base 10 includes mold base one 11, mold base two 12, and mold base three 13. Mold base two 12 and mold base three 13 are installed on the top of mold base one 11 by bolts. A limiting area for the rotation of the lower mold body 20 is formed between mold base two 12 and mold base three 13. Positioning shims 14 are evenly distributed on the two sets of bolts. The area enclosed by the two sets of positioning shims 14 is the plate positioning area. The cross-section of the lower mold body 20 is circular. The lower arc forming area 40 is eccentrically arranged on the lower mold body 20.

[0030] It also includes an upper mold body 60, on which an upper arc forming area 70 adapted to the lower arc forming area 40 is provided, and an inner hook forming area 80 connected to the upper arc forming area 70 and adapted to the bending sharp corner 50 is provided. The lower mold base 10, the lower mold body 20 and the upper mold body 60 are provided with Ti-xY wear-resistant alloy layers.

[0031] In use, the sheet material is first positioned using the positioning pad 14. Then, the upper mold body 60 moves down and the upper arc forming area 70 contacts the sheet material, moving it into the lower arc forming area 40 and bending it. When the bottom of the sheet material contacts the inner wall of the lower arc forming area 40, due to the downward pressure and the eccentric arrangement of the lower arc forming area 40, the lower mold body 20 will rotate as the upper mold body 60 continues to move down. The lower arc forming area 40 wraps the sheet material around the outside of the upper arc forming area 70. As the lower mold body 20 rotates within the limiting area, the bending tip 50 at its top rotates upward, simultaneously bending the arc-shaped buckle inward at the inner angle 50. This causes the free end of the irregular buckle to be bent by the bending tip 50 to the inner hook forming area 80 of the upper mold body 60. After forming is complete, the upper mold body 60 is reset, and the irregular buckle can be removed along the width direction of the upper mold body 60.

[0032] Example 2: Based on the above example, the following improvements are made: The outer surface of the upper arc forming area 70 is composed of several segments of arc-shaped curved surfaces connected sequentially. Because the several segments of arc-shaped curved surfaces arranged on the upper arc forming area 70 can disperse the stress direction of the sheet metal wrapped on this side along the radial direction in multiple short-distance segments, the formed irregular-shaped buckle has the advantages of low resilience and high precision. During the downward movement of the upper mold body 60, due to the anti-slip area provided on the outer surface, the initial contact position between the upper mold body 60 and the sheet metal will not move relative to each other as the upper mold body 60 moves downward.

[0033] Example 3: Based on the above examples, the following improvements were made: the processing technology of the lower mold base 10, lower mold body 20, and upper mold body 60 is as follows: the lower mold base 10, lower mold body 20, and upper mold body 60, made of 42CrMo as raw material, are subjected to nitriding followed by oxidation treatment. A deposition solution is prepared by mixing tetraethoxysilane, 28% ammonia, pure water, and anhydrous ethanol in a ratio of 1:4:7:3. The heat-treated lower mold base 10, lower mold body 20, and upper mold body 60 are placed in 25-35 times the volume of the deposition solution and ultrasonically reacted at 45-60 Hz for 2-4 hours. Then, 0.03 times the volume of nano-yttrium oxide is added to the tetraethoxysilane solution and ultrasonically reacted at 45-60 Hz for 4 hours. The ultrasonic reaction was carried out for 2–4 hours. The sample was then removed and washed twice with 250 mL of pure water and twice with 180 mL of 95% ethanol. It was dried at 85–95°C for 4–6 hours. Subsequently, it was placed in a reactor, and a vacuum was drawn to achieve a pressure of 3.5–4.5 MPa. 0.05–0.12 times the amount of gaseous titanium tetrachloride tetraethoxysilane was introduced, and the reactor temperature was raised to 345°C. The vacuum was drawn again to achieve a pressure of 3.5–4.5 MPa. Then, a mixed reducing gas was introduced until the pressure reached 75–95 MPa. The temperature of the lower mold base 10, lower mold body 20, and upper mold body 60 was set at 1150°C, and deposition was carried out for 5–8 hours to obtain the Ti-xY wear-resistant alloy layer.

[0034] Example 4: Based on the above examples, the following improvements were made: the processing technology of the lower mold base 10, lower mold body 20, and upper mold body 60 is as follows: the lower mold base 10, lower mold body 20, and upper mold body 60, made of 42CrMo as raw material, are subjected to nitriding followed by oxidation treatment. A deposition solution is prepared by mixing tetraethoxysilane, ammonia water with a mass fraction of 25%–28%, pure water, and anhydrous ethanol in a ratio of 1:5:8:4. The heat-treated lower mold base 10, lower mold body 20, and upper mold body 60 are placed in 25–35 times the volume of the deposition solution and ultrasonically reacted at 45–60 Hz for 2–4 hours. Then, 0.05 times the volume of nano-yttrium oxide is added to the tetraethoxysilane solution and ultrasonically reacted at 45–60 Hz for 2–4 hours. The mixture was subjected to ultrasonic reaction at 0 Hz for 2–4 hours. After removal, it was washed twice with 250 mL of pure water and twice with 180 mL of 95% ethanol. It was then dried at 85–95°C for 4–6 hours. Subsequently, it was placed in a reactor, and a vacuum was drawn to achieve a pressure of 3.5–4.5 MPa. 0.05–0.12 times the amount of gaseous titanium tetrachloride tetraethoxysilane was introduced, and the reactor temperature was raised to 340°C. The vacuum was drawn again to achieve a pressure of 3.5–4.5 MPa. Then, a mixed reducing gas was introduced until the pressure reached 75–95 MPa. The temperature of the lower mold base 10, lower mold body 20, and upper mold body 60 was maintained at approximately 1000°C for 7 hours to obtain the Ti-xY wear-resistant alloy layer.

[0035] Example 5: Based on the above examples, the following improvements were made: the processing technology of the lower mold base 10, lower mold body 20, and upper mold body 60 is as follows: the lower mold base 10, lower mold body 20, and upper mold body 60, made of 42CrMo as raw material, are subjected to nitriding followed by oxidation treatment. A deposition solution is prepared by mixing tetraethoxysilane, ammonia water with a mass fraction of 25%–28%, pure water, and anhydrous ethanol in a ratio of 1:4:8:3. The heat-treated lower mold base 10, lower mold body 20, and upper mold body 60 are placed in 25–35 times the volume of the deposition solution and ultrasonically reacted at 45–60 Hz for 2–4 hours. Then, 0.04 times the volume of nano-yttrium oxide is added to the tetraethoxysilane solution and ultrasonically reacted at 45–60 Hz for 2–4 hours. The mixture was subjected to ultrasonic reaction at 60 Hz for 2–4 hours. After removal, it was washed twice with 250 mL of pure water and twice with 180 mL of 95% ethanol. It was then dried at 85–95°C for 4–6 hours. Subsequently, it was placed in a reactor, and a vacuum was drawn to achieve a pressure of 3.5–4.5 MPa. 0.05–0.12 times the amount of gaseous titanium tetrachloride tetraethoxysilane was introduced, and the reactor temperature was raised to 350°C. The vacuum was drawn again to achieve a pressure of 3.5–4.5 MPa. Then, a mixed reducing gas was introduced until the pressure reached 75–95 MPa. The temperature of the lower mold base 10, lower mold body 20, and upper mold body 60 was maintained at approximately 950°C for 7 hours to obtain the Ti-xY wear-resistant alloy layer.

[0036] Comparative Example 1: Only nitriding followed by oxidation treatment.

[0037] Comparative Example 2: The lower mold base 10, lower mold body 20, and upper mold body 60, made from 42CrMo, were subjected to nitriding followed by oxidation treatment. A deposition solution was prepared by mixing tetraethoxysilane, 25%–28% ammonia, pure water, and anhydrous ethanol in a ratio of 1:4–5:7–8:3–4. The heat-treated lower mold base 10, lower mold body 20, and upper mold body 60 were placed in 25–35 times the volume of the deposition solution and ultrasonically reacted at 45–60 Hz for 2–4 hours. After removal, they were rinsed twice with 250 mL of pure water and then rinsed with 180 mL of 95% pure water. The sample was cleaned twice with % ethanol, dried at 85–95°C for 4–6 hours, and then placed in a reactor. A vacuum was drawn to a pressure of 3.5–4.5 MPa, and 0.05–0.12 times the amount of gaseous titanium tetrachloride tetraethoxysilane was introduced. The reactor temperature was raised to 330–350°C, and a vacuum was drawn again to a pressure of 3.5–4.5 MPa. Then, a mixed reducing gas was introduced until the pressure reached 75–95 MPa. The temperature of the lower mold base 10, lower mold body 20, and upper mold body 60 was maintained at 800–1200°C for 7 hours of deposition.

[0038] Comparative Example 3: The lower mold base 10, lower mold body 20, and upper mold body 60, made from 42CrMo, were subjected to nitriding followed by oxidation treatment. A deposition solution was prepared by mixing tetraethoxysilane, 25%–28% ammonia, pure water, and anhydrous ethanol in a ratio of 1:4–57–8:3–4. The heat-treated lower mold base 10, lower mold body 20, and upper mold body 60 were placed in 25–35 times the volume of the deposition solution and subjected to ultrasonic reaction at 45–60 Hz for 2–4 hours. After acoustic reaction for 2–4 hours, the sample is removed and washed twice with 250 mL of pure water and twice with 180 mL of 95% ethanol. It is then dried at 85–95°C for 4–6 hours and placed in a reactor. A vacuum is drawn to achieve a pressure of 3.5–4.5 MPa, followed by the introduction of a mixed reducing gas until the pressure reaches 75–95 MPa. Titanium wire is introduced and the temperature is increased to approximately 2000°C. The lower mold base 10, lower mold body 20, and upper mold body 60 are then deposited at 800–1200°C for 6 hours.

[0039] The following are the performance analysis results of the density and wear resistance of the Ti-xY wear-resistant alloy layers of Examples 1 to 3 and Comparative Examples 1 to 3 of the present invention:

[0040]

[0041]

[0042] Example 6: A locking process for a one-time forming mold of an R-shaped locking buckle, the molding process steps are as follows:

[0043] First, place the board in the board positioning area composed of the two positioning pads 14;

[0044] Subsequently, the upper mold body 60 moves downward and presses down on the sheet metal. During this downward movement, the sheet metal is gradually bent and enters the area between mold base 2 12 and mold base 3 13. As the upper mold body 60 continues to move downward, the left side and bottom of the upper arc forming area 70 of the lower mold body 60 first enter the lower arc forming area 40, initially forming the arc segment and the straight segment on the left side of the workpiece. The upper mold body 60 continues to move downward, causing the lower mold body 20 to rotate within the limiting area. The lower arc forming area 70 follows the downward movement of the upper mold body 60. The downward rotation of the upper mold body 60 forms the bottom of the arc segment of the workpiece. As the lower arc forming area 70 moves downward relative to the lower mold base 10 and rotates, the bending tip 50 rotates towards the inward hook forming area 80, applying pressure to bend and form the end of the arc segment of the workpiece. When both the upper mold body 60 and the lower mold body 20 move down to the bending end position, the workpiece is formed on the outside of the upper arc forming area 70 and the inward hook forming area 80 of the upper mold body 60. After the upper mold body 60 is reset, the workpiece can be removed along the width direction of the upper mold body 60.

[0045] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made to the technical solutions and inventive concepts of the present invention should all be covered within the scope of protection of the present invention.

Claims

1. A one-shot R-shaped hasp forming die comprising a lower die seat (10), characterized in that, The lower mold base (10) is rotatably provided with a lower mold body (20), and a spring (30) is connected between the lower mold body (20) and the lower mold base (10). The lower mold body (20) is provided with a lower arc forming area (40), and the top of the lower arc forming area (40) extends inward to form a bent sharp corner (50). It also includes an upper mold body (60), on which an upper arc forming area (70) adapted to the lower arc forming area (40) and an inner hook forming area (80) connected to the upper arc forming area (70) and adapted to the bending sharp corner (50) are arranged. The processing steps for the lower mold base (10), lower mold body (20), and upper mold body (60) are as follows: The lower mold base (10), lower mold body (20), and upper mold body (60) made of 42CrMo steel are subjected to nitriding followed by oxidation treatment. A deposition solution is prepared by mixing tetraethoxysilane, ammonia water with a mass fraction of 25%~28%, pure water, and anhydrous ethanol in a ratio of 1:(4~5):(7~8):(3~4). The heat-treated lower mold base (10), lower mold body (20), and upper mold body (60) are placed in 25~35 times the amount of deposition solution and ultrasonically reacted at 45~60Hz for 2~4 hours. Then, 0.02~0.08 times the amount of tetraethoxysilane nano-coated silane is added. Yttrium oxide was ultrasonically reacted at 45-60 Hz for 2-4 hours, then removed and washed twice with 250 mL of pure water and twice with 180 mL of 95% ethanol. It was then dried at 85-95°C for 4-6 hours and placed in a reactor. The pressure was evacuated to 3.5-4.5 MPa, and 0.05-0.12 times the amount of gaseous titanium tetrachloride tetraethoxysilane was introduced. The reactor temperature was raised to 330-350°C, and the pressure was evacuated again to 3.5-4.5 MPa. Then, mixed reducing gas was introduced until the pressure reached 75-95 MPa. The temperature of the lower mold base (10), lower mold body (20), and upper mold body (60) was 800-1200°C for 5-8 hours.

2. The R-shaped latch one-time forming mold according to claim 1, characterized in that, The lower mold base (10) includes mold base one (11), mold base two (12), and mold base three (13). Mold base two (12) and mold base three (13) are installed on the top of mold base one (11) by bolts. A limiting area for the lower mold body (20) to rotate is provided between mold base two (12) and mold base three (13). Positioning pads (14) are evenly distributed on the two sets of bolts. The area surrounded by the two sets of positioning pads (14) is the plate positioning area.

3. The R-shaped latch one-time forming mold according to claim 2, characterized in that, The lower mold body (20) has a circular cross-section, and the lower arc forming area (40) is eccentrically arranged on the lower mold body (20).

4. The R-shaped latch one-time forming mold according to claim 3, characterized in that, The outer circumferential surface of the upper arc forming area (70) is evenly distributed with anti-slip areas composed of several arc curved surfaces connected in sequence.

5. The R-shaped latch one-time forming mold according to claim 1, characterized in that, The mixed reducing gas includes one or more of hydrogen and silane in addition to methane.

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