Titanium alloy rotary body structure hollow part shaping mold

Abstract

The invention discloses a titanium alloy rotary body structure hollow part shaping die which comprises an outer die and an inner die, the outer die is formed by splicing two female dies (6), and the inner die comprises four wide expansion petals (2-1), four narrow expansion petals (2-2) and a core body (4); after the mold is closed, the four narrow expansion petals (2-2) are arranged in a cross shape from the overlook direction, the four wide expansion petals (2-1) and the four narrow expansion petals (2-2) are alternately and annularly arranged, and the centers of the eight expansion petals form a round hole; the core body (4) is placed in the round hole and is of a cylinder structure with taper. Aiming at the problem that expansion petals designed in the prior art are poor in adaptability, the cross-shaped expansion petal mold structure is provided, expansion petal gaps are replaced with narrow expansion petals, overall shape correction of a wine jar type titanium alloy hollow part is achieved, and the requirement for the profile tolerance of the surface of the part is met.

Description

Technical Field

[0001] The invention relates to a mould structure for ensuring a part profile. Background Art

[0002] like Figure 1 As shown in the figure, a certain partition section is a new type of hollow part with a "wine jar" structure in the engine sheet metal parts. The structure is relatively complex. There are two main complex points: first, the part is a "wine jar" structure with a "bulging belly" in the middle and small ends. Second, the part surface profile is required to be no greater than 0.4. Due to these two complex points of the funnel, the common bulging structure, the bulging flap width is evenly distributed along the centripetal direction, and the gap is symmetrically offset along the center line, which cannot be used for heat setting of this type of structural parts. The reason is that h2 (Figure) is 26.6mm and 46mm respectively, which is quite different from the diameter of the small end. According to h2=26.6mm and the diameter size is φ285mm, the expansion petal strength is calculated according to the part structure. If the bulging die of this size is divided into 6 bulging petals, the bulging petal width is about 125mm, the bulging petals are closed, and the radius is reduced by 26.6mm. Then the minimum bulging petal gap is 46mm, and the φ285mm diameter bulging petal print height reaches 1.85mm. If it is divided into 8 bulging petals, the bulging petal width is 90mm, the bulging petals are closed, and the radius is reduced by 26.6mm. Then the minimum bulging petal gap is 30mm, and the φ285mm diameter bulging petal print height reaches 0.79mm. Both specifications of bulging petals are far from meeting the part contour requirements. Summary of the invention

[0003] The purpose of the present invention is to provide a "cross" shaped expansion flap mold structure to solve the problem of poor adaptability of the expansion flaps designed by existing technology, replace the expansion flap gap with narrow expansion flaps, achieve the overall correction of the "wine jar" type titanium alloy hollow part, and ensure the surface contour requirements of the part.

[0004] The technical solution of the present invention:

[0005] A titanium alloy rotating body structure hollow part shaping die, comprising an outer die and an inner die, characterized in that: the outer die is formed by splicing two concave dies 6, and the inner die comprises four wide petals 2-1, four narrow petals 2-2 and a core 4;

[0006] After the mold is closed, when viewed from above, the four narrow petals 2-2 are arranged in a cross shape, the four wide petals 2-1 and the four narrow petals 2-2 are arranged alternately in a ring shape, and a circular hole is formed in the center of the eight petals.

[0007] The core 4 is placed in the circular hole, and the core 4 is a tapered cylindrical structure.

[0008] The outer mold and the inner mold are both placed on the lower mold plate 1, and there is a pressing plate 3 on the top of the outer mold and the inner mold, and the pressing plate 3 is pressed on the boundary line between the outer mold and the inner mold.

[0009] The inner surfaces of the two concave dies 6 match the outer surface contour of the titanium alloy hollow body of revolution structure, and the outer surface of the inner die composed of 8 petals matches the inner surface contour of the titanium alloy hollow body of revolution structure.

[0010] Seen from a top view, the narrow petal 2-2 is strip-shaped, and the wide petal 2-1 is fan-shaped.

[0011] The inner edges of the upper end surfaces of the wide petal 2-1 and the narrow petal 2-2 are chamfered.

[0012] The upper end surfaces of the wide expansion petal 2-1 and the narrow expansion petal 2-2 are provided with lifting holes.

[0013] A limit block 5 is placed at the bottom of the circular hole in the center of the inner mold.

[0014] The rotating body structure is in the shape of a wine jar.

[0015] The method of using this mold for shaping includes:

[0016] A. Take out the narrow petal 2-2, gather four wide petals 2-1 on the lower template 1, and put the hollow piece to be shaped on the four wide petals.

[0017] The petals are 2-1 outside;

[0018] B. Expand the four wide petals 2-1 to match the inner wall of the hollow piece, and insert four wide petals 2-1 between them.

[0019] Narrow petal 2-2, insert the core 5 in the center of the petal;

[0020] C. Place two concave molds 6 on both sides of the hollow part and move them inward to form a complete outer mold, and press the outer mold with a pressing plate 3.

[0021] and inner mold;

[0022] D. Press the core 5 down to the bottom;

[0023] E. Heat the mold and hollow parts, cool them down to a certain temperature, open the mold and take out the parts.

[0024] Beneficial effects of the present invention:

[0025] The present invention specially designs narrow expansion petals to replace the traditional expansion petal gap, which reduces the expansion petal mark while meeting the requirements of mold opening and closing, and ensures the surface quality of the bulging parts.

[0026] A breakthrough has been achieved in the overall shaping method of the "wine jar" structure titanium alloy parts with small bulging amount, providing a new heat setting method for such parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structural parts of a "wine jar".

[0028] Figure 2 This is a schematic diagram of the heat-setting mold for the "wine jar" structural parts.

[0029] Figure 3 It is a schematic diagram of the inner expansion valve.

[0030] Figure 4 It is a schematic diagram of the AA cross-sectional view of the inner expansion valve.

[0031] Figure 5 It is a schematic diagram of the core.

[0032] Figure 6 It is a schematic diagram of the die. DETAILED DESCRIPTION

[0033] Example:

[0034] Mould structure Figure 2 As shown, the overall technical solution of this structure is to design the expansion petals into wide and narrow "cross" expansion petals in the mold structure. The wide expansion petal 2-1 is evenly divided into 4 pieces along the centripetal direction of the general inflation forming mold, and the narrow expansion petal 2-1 is designed along the central symmetrical offset. 2-4mm is left between the wide expansion petal and the narrow expansion petal as the expansion amount to facilitate the movement of the expansion petal and complete the overall shaping of the part through a small gap. The mold structure mainly realizes the overall correction of the titanium alloy "wine jar" type parts through the following technical solutions: the mold consists of a lower template 1, expansion petals 2 (the expansion petals are divided into wide expansion petals 2-1 and narrow expansion petals 2-2), a pressure plate 3, a core body 4, a limit block 5, and a die 6. The expansion petal 2 is placed on the lower template 1. The expansion petal 2 can move freely on the lower template 1. When the mold is heated, the material will expand. To prevent the material from being squeezed due to expansion, a 2-4mm gap is left between the wide and narrow expansion petals to facilitate the movement of the expansion petals. The diameter size of the expansion petal 2 is limited by the core body 4. The limit block 5 is placed on the lower template 1 inside the expansion petal. The core body 4 is a conical surface with a certain angle, and its outer diameter and the inner hole of the expansion petal 2 are inverted cones opposite to the conical surface of the core body 4. After the mold is closed, from a top view, the narrow expansion petals 2-2 are strip-shaped, the wide expansion petals 2-1 are fan-shaped, the four narrow expansion petals 2-2 are arranged in a cross shape, the four wide expansion petals 2-1 and the four narrow expansion petals 2-2 are arranged alternately in a ring shape, the eight expansion petals 2 form a circular hole in the center, the core 4 is placed in the circular hole, and the core 4 is a cylindrical structure with a taper. The pressing plate 3 can ensure that the expansion petals only move on the horizontal plane.

[0035] The inner edges of the upper end surfaces of the wide expansion petal 2-1 and the narrow expansion petal 2-2 are chamfered to facilitate guiding the inserted core 4. The upper end surfaces of the wide expansion petal 2-1 and the narrow expansion petal 2-2 are provided with hoisting holes, and hoisting bolts can be screwed in for hoisting.

[0036] When processing parts, first take out the narrow expansion flap 2-2, close the wide expansion flap 2-1, put the parts into the expansion flap, move the wide expansion flap 2-1 to fit the inner surface of the part, respectively install the narrow expansion flap 2-2 in the gap of the wide expansion flap 2-1, place the pressing plate 3 on the expansion flap, and finally install the core 4 into the inner hole of the expansion flap, place the two concave molds 6 on the outer surface of the part, connect the two concave molds 6 by screws, tighten the screws, and make the two surfaces of the concave molds 6 fit tightly. Press down the core 4, contact the inner surface of the expansion flap through the conical surface, and move the expansion flap outward until the lower surface of the core 4 contacts the upper surface of the limit block 5. To prevent the expansion flap from tipping over, the expansion flap 2 is pressed by the pressing block to achieve the parallelism of the expansion flap 2 and the center of the part. The part heats up with the mold, and cools down after reaching a certain temperature. Open the concave mold 6, take out the narrow expansion flap 2-2, close the wide expansion flap 2-1, and take out the part.

Claims

1. A titanium alloy rotating body structure hollow part shaping die, comprising an outer die and an inner die, characterized in that: The outer mold is formed by splicing two concave molds (6), and the inner mold comprises four wide expansion petals (2-1), four narrow expansion petals (2-2) and a core body (4); after the mold is closed, when viewed from a top view, the four narrow expansion petals (2-2) are arranged in a cross shape, the four wide expansion petals (2-1) and the four narrow expansion petals (2-2) are arranged alternately in a ring shape, and a circular hole is formed in the center of the eight expansion petals; The core body (4) is placed in the circular hole, and the core body (4) is a cylindrical structure with a taper.

2. The titanium alloy rotating body structure hollow part shaping die according to claim 1, characterized in that: The outer mold and the inner mold are both placed on the lower mold plate (1), and a pressing plate (3) is provided on the top of the outer mold and the inner mold, and the pressing plate (3) is pressed on the boundary line between the outer mold and the inner mold.

3. The titanium alloy rotating body structure hollow part shaping die according to claim 1, characterized in that: The inner surfaces of the two concave dies (6) match the outer surface contour of the hollow member of the titanium alloy rotating body structure, and the outer surface of the inner die composed of eight petals matches the inner surface contour of the hollow member of the titanium alloy rotating body structure.

4. The titanium alloy rotating body structure hollow part shaping die according to claim 1, characterized in that: When viewed from above, the narrow petal (2-2) is strip-shaped, and the wide petal (2-1) is fan-shaped.

5. The titanium alloy rotating body structure hollow part shaping die according to claim 1, characterized in that: The inner edges of the upper end surfaces of the wide expansion petal (2-1) and the narrow expansion petal (2-2) are chamfered.

6. The titanium alloy rotating body structure hollow part shaping die according to claim 1, characterized in that: The upper end surfaces of the wide expansion flap (2-1) and the narrow expansion flap (2-2) are provided with hoisting holes.

7. The titanium alloy rotating body structure hollow part shaping die according to claim 1, characterized in that: A limiting block (5) is placed at the bottom of the circular hole in the center of the inner mold.

8. The titanium alloy rotating body structure hollow part shaping die according to any one of claims 1 to 7, characterized in that: The rotating body structure is in the shape of a wine jar.

9. The titanium alloy rotating body structure hollow part shaping die according to claim 2, characterized in that The stereotypes include: A. Take out the narrow expansion petals (2-2), gather four wide expansion petals (2-1) on the lower template (1), and put the hollow piece to be formed outside the four wide expansion petals (2-1); B. Expand the four wide petals (2-1) outwards to make them match the inner wall surface of the hollow member, insert the four narrow petals (2-2) between the four wide petals (2-1), and insert the core 5 in the center of the petals; C. placing two concave molds (6) on both sides of the hollow piece and moving them inward to form a complete outer mold, and pressing the outer mold and the inner mold with a pressing plate (3); D. Press the core 5 down to the bottom; E. Heat the mold and hollow parts, cool them down to a certain temperature, open the mold and take out the parts.

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