Mould piece forming device

Abstract

The utility model belongs to the technical field of aerospace, and particularly relates to a mold piece forming device which comprises a mold plate. The first upper half die comprises a first forming die, a connecting part and a first concave die, the first convex die penetrates through the plate from the lower part and then extends into the first concave die, a first annular space is formed between the outer side of the first concave die and the inner side of the first forming die, and an extrusion ring is arranged in the first annular space; the first lower half die comprises a first convex die, a second forming die and a third forming die, the upper end of the second forming die is provided with a curved surface, under the die assembly effect and under the limitation of the curved surface, a plate is formed for the first time to form a first die piece, and a third annular space is formed between the inner side face of the third forming die and the outer side face of a second convex part; a first material supporting ring is arranged in the third annular space, a second annular space is formed between the outer side of the first male die and the inner side face of the second forming die, and a second material supporting ring is arranged in the second annular space. According to the utility model, the molding precision of the mold sheet is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of aerospace. Specifically, it relates to a die sheet forming device. BACKGROUND

[0002] At present, the die sheet is very widely used in the industrial fields of aerospace, automobiles and the like, and the problem of insufficient rigidity of the die sheet can be better solved through stamping forming, and the die sheet stamping forming has higher production efficiency, and the principle of the die sheet stamping forming is that an external force is applied to the stainless steel plate by a press machine and a die to make the stainless steel plate produce plastic deformation or separation. CONTENT OF THE UTILITY MODEL

[0003] The utility model is just proposed based on the above-mentioned needs of the prior art, and the technical problem to be solved by the utility model is to improve the precision of die sheet forming. In order to solve the above-mentioned problems, the utility model is realized by adopting the following technical scheme:

[0004] The mold piece forming device is characterized in that it comprises a mold plate including an upper mold plate and a lower mold plate arranged oppositely in a vertical direction; an upper half mold including a first upper half mold connected with the upper mold plate, the first upper half mold including a first forming die accommodating a connecting part and a first female die, the connecting part being arranged inside the first forming die, and the first female die being arranged at a lower end of the connecting part, wherein the first female die has a downward opening extending upward to form a groove, a first male die penetrating through a hole on a to-be-formed plate from below and extending into the groove of the first female die, an outer side surface of the first male die being fitted with an inner side surface of the first female die to perform a first forming on the to-be-formed plate, and an outer diameter size of the first female die being smaller than an inner diameter size of the first forming die to form a first annular space between an outer side of the first female die and an inner side wall of the first forming die, an extrusion ring being arranged in the first annular space, the first forming die including a first abutting part arranged above the first forming die and abutting against the upper mold plate, and a first protruding part extending downward from the first abutting part; and a lower half mold including a first lower half mold connected with the lower mold plate, the first lower half mold including a second forming die internally accommodating a first male die, a third forming die arranged outside the second forming die, and the first male die, wherein the second forming die includes a second abutting part abutting against an upper surface of the lower mold plate, and a second protruding part extending upward from a middle part of the second abutting part, the second forming die having a curved surface at an upper end, the curved surface extending downward from an upper end surface of the second forming die, and an outer diameter size of the curved surface gradually increasing from top to bottom, the to-be-formed plate being formed into a first mold piece under the limitation of the curved surface and the clamping action of the first upper half mold and the first lower half mold, an inner diameter size of the third forming die being larger than an outer diameter size of the second forming die to form a third annular space between an inner side surface of the third forming die and an outer side surface of the second protruding part, a first material supporting ring being arranged in the third annular space, and an outer diameter size of the first male die being smaller than an inner diameter size of the second forming die to form a second annular space between an outer side of the first male die and an inner side surface of the second forming die, a second material supporting ring being arranged in the second annular space.

[0005] Further, a wall thickness of the first material supporting ring is matched with a side wall size of the first protruding part, the first protruding part penetrating into the third annular space from above under the clamping action of the mold piece forming device, and a lower end surface of the first protruding part being fitted with an upper end surface of the first material supporting ring, so that the first material supporting ring moves downward to a limiting position in the third annular space.

[0006] Further, the wall thickness of the second material supporting ring is matched with the size of the side wall of the first die, and under the clamping action of the mold forming device, the first die is deeply inserted into the second annular space from above, and the lower end surface of the first die side wall is attached to the upper end surface of the second material supporting ring, so that the second material supporting ring moves downward to the limiting position in the second annular space.

[0007] Further, the length of the extrusion ring in the vertical direction is at least the same as the length of the first annular space in the natural state, so as to extrude the extrusion ring through the curved surface of the upper end of the second forming die under the clamping action.

[0008] Further, the outer diameter size of the third forming die is the same as the outer diameter size of the first forming die.

[0009] Further, the upper die plate and the lower die plate have through holes penetrating in the vertical direction, and the die plate and the first upper half die and the first lower half die are fixedly connected through the through holes.

[0010] Further, the radial size of the upper half die and the lower half die is smaller than the radial size of the die plate.

[0011] Further, the upper half die includes a second upper half die, the second upper half die includes a second die connected with the upper die plate, a first material supporting ring of the first mold piece is positioned inside the second die, a second material supporting ring of the first mold piece is positioned outside the second die, and a spring is connected with the second material supporting ring and the upper die plate, wherein the second die has a downward opening, the opening extends upward to form a groove, a second protrusion of the first mold piece extends into the groove of the second die from below through the hole on the first mold piece, the outer side surface of the second protrusion is attached to the inner side surface of the second die to perform the second forming on the first mold piece, and the first material supporting ring is arranged in the groove of the second die; the lower half die includes a second lower half die, the second lower half die is arranged to be connected with the lower die plate, the second lower half die includes a second protrusion and a fourth forming die, wherein the outer diameter size of the second protrusion is smaller than the inner diameter size of the fourth forming die, the second protrusion is arranged in the fourth forming die to form a fourth annular space between the outer side wall of the second protrusion and the inner side wall of the fourth forming die, and a third material supporting ring is arranged in the fourth annular space.

[0012] Further, the wall thickness of the third material supporting ring is matched with the size of the side wall of the second die, and under the clamping action of the mold forming device, the second die is deeply inserted into the fourth annular space from above, the lower end surface of the second die side wall is attached to the upper end surface of the third material supporting ring, so that the third material supporting ring moves downward to the limiting position in the fourth annular space, and the first mold piece is secondly formed to form a second mold piece under the clamping action.

[0013] Further, in the second forming, positioning holes are arranged on the upper die plate, positioning columns are arranged on the lower die plate, and the second upper half die and the second lower half die are relatively fixed through cooperation of the positioning holes and the positioning columns.

[0014] Compared with the prior art, the die forming device improves the precision of die forming. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present specification or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present specification, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0016] Figure 1 is a cross-sectional structure diagram of the mold opening state in the first forming in the embodiment of the present utility model;

[0017] Figure 2 is a cross-sectional structure diagram of the first upper half die in the embodiment of the present utility model;

[0018] Figure 3 is a cross-sectional structure diagram of the first lower half die in the embodiment of the present utility model;

[0019] Figure 4 is a cross-sectional structure diagram of the mold closing state in the embodiment of the present utility model;

[0020] Figure 5 is a structure diagram of the first die in the embodiment of the present utility model;

[0021] Figure 6 is a cross-sectional structure diagram of the mold opening state in the second forming in the embodiment of the present utility model;

[0022] Figure 7 is a structure diagram of the second die in the embodiment of the present utility model.

[0023] Reference signs:

[0024] 1, template; 1-1, upper die plate; 1-2, lower die plate; 2, first upper half die; 2-1, first forming die; 2-1-1, first abutting portion; 2-1-2, first protruding portion; 2-2, connecting portion; 2-3 first female die; 3, first lower half die; 3-1, first male die; 3-2, second forming die; 3-2-1, second abutting portion; 3-2-2, second protruding portion; 3-3, third forming die; 4, extrusion block; 5, curved surface; 6, first material supporting ring; 7, second material supporting ring; 8, first die sheet; 9, second upper half die; 9-1, second female die; 9-2, first pressure ring; 9-3, second pressure ring; 9-4, spring; 10, second lower half die; 10-1, second male die; 10-2, fourth forming die; 11, third material supporting ring; 12, positioning hole; 13, positioning column; 14, second die sheet. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] In order to facilitate the understanding of the embodiments of the present application, the embodiments will be further explained and described in detail below in combination with the drawings. The embodiments do not constitute a limitation on the protection scope of the present application.

[0027] The diaphragm structure is simple, light and cheap, and is widely used in the fields of aviation, aerospace, automobile and the like. The diaphragm is usually processed by stamping forming, but the diaphragm is prone to springback in the stamping forming process. Therefore, the present specific embodiment provides a diaphragm forming device, as shown in Figure 1 The diaphragm forming device comprises a template 1, a first upper half die 2 and a first lower half die 3.

[0028] The template 1 comprises an upper die plate 1-1 and a lower die plate 1-2, and the upper die plate 1-1 and the lower die plate 1-2 are arranged opposite to each other in the vertical direction, and form a space for longitudinally placing a to-be-formed plate and other components of the forming device between them in the vertical direction. Further, the template 1 has a through hole penetrating in the vertical direction, which facilitates the connection of the template 1, the first upper half die 2 and the first lower half die 3 through the through hole.

[0029] The first upper half die 2 is arranged below the upper die plate 1-1, and the first upper half die 2 comprises a first forming die 2-1, a connecting portion 2-2 and a first female die 2-3, as shown in Figure 2The first molding die 2-1 has a space inside for accommodating the connecting part 2-2 and the first female die 2-3 in the vertical direction, and comprises a first abutting part 2-1-1 and a first protruding part 2-1-2. The first abutting part 2-1-1 is located at the upper end of the first molding die 2-1 and tightly abuts the lower surface of the upper die plate 1-1 when the first molding die 2-1 is connected below the upper die plate 1-1. The first protruding part 2-1-2 is formed by extending downward from the middle part of the first abutting part 2-1-1.

[0030] The connecting part 2-2 is arranged above the first female die 2-3 and the first female die 2-3 is arranged inside the first molding die 2-1 through the connecting part 2-2. The outer diameter size of the first female die 2-3 is smaller than the inner diameter size of the first molding die 2-1, so that a first annular space is formed between the outer side surface of the first female die 2-1 and the inner side surface of the first molding die 2-1, and a pressing ring 4 is arranged in the first annular space. The pressing ring 4 is preferably made of polyurethane material, which is beneficial to uniform stress on the plate to be molded during the clamping process and helps to accurately mold the die piece into the required shape.

[0031] Further, the radial size of the first molding die 2-1 is smaller than the radial size of the upper die plate 1-1, so that when the pressure machine or other equipment applies pressure from above the upper die plate 1-1, the pressure can be uniformly transmitted to the die piece molding device.

[0032] The first female die 2-3 is formed by extending downward from the middle part of the connecting part 2-2 and is firmly clamped in the inner space of the first molding die 2-1 along the vertical direction through the connecting part 2-2. When the connecting part 2-2 and the first female die 2-3 are arranged inside the first molding die 2-1, the connecting part 2-2 tightly abuts the lower surface of the upper die plate 1-1, which is beneficial to the stability of the first upper half die 2 during the molding process and the uniform transmission of the force. In addition, the first female die 2-3 has a downward opening, which extends upward to form a groove, and a part of the lower end of the first female die 2-3 cooperates with the first lower half die 3 to position the plate to be processed from the top and bottom.

[0033] The first lower half die 3 is arranged above the lower die plate 1-2 and comprises a first male die 3-1, a second molding die 3-2 and a third molding die 3-3, as Figure 3 shown.

[0034] The first punch 3-1 is arranged in the second forming die 3-2, and the outer diameter size of the first punch 3-1 is smaller than the inner diameter size of the second forming die 3-2, so that a second annular space is formed between the first punch 3-1 and the second forming die 3-2, and the first material supporting ring 6 is arranged in the second annular space and can move in the vertical direction in the second annular space under the action of an external force.

[0035] In addition, the outer diameter size of the first punch 3-1 is the same as the inner diameter size of the first recess die 2-3, and the wall thickness of the first material supporting ring 6 is the same as the wall thickness of the first recess die 2-3. Therefore, the first punch 3-1 can penetrate into the interior of the first recess die 2-3 in the vertical direction, and the side wall of the first recess die 2-3 can extend into the second annular space where the first material supporting ring 6 is arranged.

[0036] When the mold sheet forming device is clamped, that is, under the action of the force applied by the press, the first punch 3-1 penetrates into the groove of the first recess die 2-3 from below through the hole in the plate to be formed, and the first recess die 2-3 penetrates into the second annular space from above. In addition, the outer side surface of the first punch 3-1 is in close contact with the inner side surface of the first recess die 2-3, and the lower end surface of the first recess die 2-3 is in close contact with the upper end surface of the first material supporting ring 6, so that the first material supporting ring 6 moves downward to the limiting position in the second annular space.

[0037] The second forming die 3-2 comprises a second abutting portion 3-2-1 and a second protruding portion 3-2-2. The second abutting portion 3-2-1 is located at the lower end of the second forming die 3-2, and when the second forming die 3-2 is arranged on the lower die plate 1-2, the second abutting portion 3-2-1 is in close contact with the upper surface of the lower die plate 1-2. The second protruding portion 3-2-2 is formed by extending upward from the middle portion of the second abutting portion 3-2-1.

[0038] The first punch 3-1 and the second forming die 3-2 are arranged in the internal space of the third forming die 3-3. The outer diameter size of the third forming die 3-3 is the same as that of the first forming die 2-1, and during the forming process, the third forming die 3-3 and the first forming die 2-1 are aligned in the vertical direction so that the first upper half die 2 and the first lower half die 3 are both perpendicular to the die plate 1, thereby keeping the mold sheet forming device stable under the action of an external force and preventing possible shaking from affecting the forming precision.

[0039] The second protruding part 3-2-2 of the second forming die 3-2 and the inner side of the third forming die 3-3 form a third annular space, and a second material supporting ring 7 is arranged in the third annular space. The second material supporting ring 7 can move in the vertical direction in the third annular space under the action of external force. The wall thickness of the second material supporting ring 7 is matched with the size of the side wall of the first protruding part 2-1-2 of the first forming die 2-1. Under the action of external force, the first protruding part 2-1-2 can penetrate into the third annular space from above, and the lower end surface of the side wall of the first protruding part 2-1-2 closely abuts against the upper end surface of the second material supporting ring 7, so that the second material supporting ring 7 moves downward in the third annular space to a limiting position.

[0040] Further, the first material supporting ring 6 and the second material supporting ring 7 are preferably made of elastic material, such as spring or the like. In this way, the first material supporting ring 6 and the second material supporting ring 7 are in a free state to support the plate to be processed under the condition that no external force is applied, that is, the mold forming device is in an open mold state.

[0041] In order to form the plate to be formed into a required shape, a curved surface 5 is arranged at the upper end of the second forming die 3-2. In the specific embodiment, the curved surface extends downward from the upper end surface of the second forming die 3-2, and the outer diameter of the curved surface gradually increases from top to bottom.

[0042] In the specific embodiment, before the mold forming device performs the forming operation on the plate, the mold forming device is in an open mold state, and at this time, the extrusion ring 4 is in a free length state. Further, the second material supporting ring 7 and the first material supporting ring 6 are both in a raised state to support the plate. Further, the length of the extrusion ring 4 in the vertical direction under the natural state is at least the same as the length of the first annular space, so that the extrusion ring 4 can be extruded through the curved surface 5 at the upper end of the second forming die 3-2 under the action of mold closing to perform the first forming on the plate.

[0043] Then, the press is started to move downward. In this process, the extrusion ring 4 contacts the curved surface 5 of the second forming die 3-2, and the lower end of the extrusion ring 4 is compressed in the vertical direction under the limitation of the curved surface 5. As the press continues to move downward, the lower end surface of the first protruding part 2-1-2 of the first forming die 2-1 contacts the upper end surface of the second material supporting ring 7 in the vertical direction, and the lower end surface of the first concave die 2-3 contacts the upper end surface of the first material supporting ring 6 in the vertical direction. Under the pressure action of the continuous downward movement of the press, the second material supporting ring 7 and the first material supporting ring 6 continuously move downward until reaching the limiting position. At this time, the mold forming device is in a closed mold state, as shown in Figure 4

[0044] ​Then, the press is moved upwards, and the sheet metal is lifted by the elastic action of the second support ring 7 and the first support ring 6, thereby obtaining the first die 8. Figure 5 As shown, the mold forming device returns to its initial state, that is, to the mold opening state, at which point the first forming of the sheet material is completed.

[0045] After the first molding is completed, the first mold piece 8 may have burrs, flash, or other defects. To ensure the quality of the mold piece molding, the first mold piece 8 undergoes a second molding. Before the second molding, the first upper mold 2 is replaced with the second upper mold 9, and the first lower mold 3 is replaced with the second lower mold 10. Then, the first mold piece 8 undergoes a second molding, as follows: Figure 6 As shown. The second upper mold 9 includes a second cavity 9-1, which has a downward opening that extends upward to form a groove. The upper end face of the second cavity 9-1 is connected to the lower surface of the upper template 1-1.

[0046] Furthermore, the second upper mold 9 includes a first pressure ring 9-2 and a second pressure ring 9-3. The first pressure ring 9-2 is disposed inside the second die 9-1, and the second pressure ring 9-3 is disposed outside the second die 9-1. This allows the first pressure ring 9-2 to position the first mold piece 8 from inside the second die 9-1, and the second pressure ring 9-3 to position the first mold piece 8 from outside the second die 9-1. This facilitates the secure positioning of the first mold piece 8 in the mold forming device, which is beneficial for precise forming.

[0047] Furthermore, the second upper mold 9 also includes a spring 9-3, which connects the second pressure ring 9-3 and the upper template 1-1 together. The spring 9-3 can adjust the position of the second pressure ring 9-3 according to the shape of the first mold piece 8.

[0048] The second lower mold 10 is disposed above the lower template 1-2. The second lower mold 10 includes a second punch 10-1 and a fourth forming mold 10-2. The second punch 10-1 is disposed above the lower template 1-2, and its outer diameter is adapted to the inner diameter of the second die 9-1.

[0049] The fourth forming die 10-2 has a hollow space inside, the second male die 10-1 is arranged in the hollow space, the outer diameter size of the second male die 10-1 is smaller than the inner diameter size of the fourth forming die 10-2, so that a fourth annular space is formed between the two, and the third material supporting ring 11 is arranged in the fourth annular space. The third material supporting ring 11 can move in the vertical direction in the fourth annular space under the action of an external force. And the wall thickness of the third material supporting ring 11 is the same as the wall thickness of the second female die 9-1.

[0050] Then the first mold piece 8 is subjected to second forming. First, the first mold piece 8 is placed between the second upper half die 9 and the second lower half die 10, and the downward movement of the press is started so that the mold is closed. During the mold closing process, the side wall of the second female die 9-1 penetrates into the fourth annular space from above, the second male die 10-1 penetrates into the groove of the second female die 9-1 from below after passing through the hole on the first mold piece 8, and the lower end surface of the second female die 9-1 tightly abuts against the upper end surface of the third material supporting ring 11, and the outer side surface of the upper end of the second male die 10-1 tightly abuts against the inner side surface of the lower end of the second female die 9-1, so that the third material supporting ring 11 moves downward in the fourth annular space to a limiting position. At this time, the second forming of the first mold piece 8 is completed under the action of the second upper half die 9 and the second lower half die 10, and the second mold piece 14 is obtained, as shown in Figure 7

[0051] Further, during the second forming of the first mold piece 8, the positioning hole 12 is arranged on the upper die plate 1-1, and the positioning column 13 is arranged on the lower die plate 1-2, so that the second upper half die 9 and the second lower half die 10 are relatively fixed through the cooperation of the positioning hole and the positioning column.

[0052] The above specific embodiments further illustrate the purpose, technical scheme and beneficial effects of the present application, and it should be understood that the above description is only a specific embodiment of the present application and is not used to limit the protection scope of the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.​

Claims

1. A template forming device, characterized in that, include: Templates, including an upper template and a lower template arranged opposite each other in a vertical direction; The upper mold includes a first upper mold connected to the upper template. The first upper mold includes a first forming mold accommodating a connecting portion and a first cavity, a connecting portion housing the first cavity inside the first forming mold, and a first cavity disposed at the lower end of the connecting portion. The first die has a downward-facing opening that extends upward to form a groove. A first punch passes through an opening in the sheet material to be formed from below and extends into the groove of the first die. The outer surface of the first punch fits against the inner surface of the first die to perform the first forming of the sheet material. Furthermore, the outer diameter of the first die is smaller than the inner diameter of the first forming die, forming a first annular space between the outer side of the first die and the inner sidewall of the first forming die. An extrusion ring is disposed within this first annular space. The first molding die includes a first abutting part and a first protrusion part. The first abutting part is disposed above the first molding die and abuts against the upper template. The first protrusion part extends downward from the first abutting part. The lower mold includes a first lower mold connected to the lower template. The first lower mold includes a second forming mold with a first punch inside, a third forming mold outside the second forming mold, and the first punch. The second forming mold includes a second abutting portion and a second protruding portion. The second abutting portion abuts against the upper surface of the lower mold plate, and the second protruding portion extends upward from the middle of the second abutting portion. The upper end of the second forming mold has a curved surface that extends downward from the upper end of the second forming mold. The outer diameter of the curved surface gradually increases from top to bottom. Under the closing action of the first upper mold and the first lower mold, and constrained by the curved surface, the material to be formed is firstly formed to create the first mold piece. The inner diameter of the third forming mold is larger than the outer diameter of the second forming mold, so as to form a third annular space between the inner side of the third forming mold and the outer side of the second protrusion. A first material support ring is provided in the third annular space. The outer diameter of the first punch is smaller than the inner diameter of the second forming die, so as to form a second annular space between the outer side of the first punch and the inner side of the second forming die, and a second material support ring is provided in the second annular space.

2. The die forming apparatus according to claim 1, characterized in that, The wall thickness of the first material support ring is adapted to the side wall size of the first protrusion. Under the mold closing action of the mold forming device, the first protrusion extends into the third annular space from above, and the lower end face of the first protrusion fits against the upper end face of the first material support ring, so that the first material support ring moves downward to the limit position in the third annular space.

3. The die forming apparatus according to claim 1, characterized in that, The wall thickness of the second material support ring is adapted to the side wall size of the first die. Under the mold closing action of the die forming device, the first die extends into the second annular space from above, and the lower end face of the side wall of the first die fits against the upper end face of the second material support ring, so that the second material support ring moves downward to the limit position in the second annular space.

4. The die forming apparatus according to claim 1, characterized in that, The length of the extrusion ring in the vertical direction under natural conditions is at least the same as the length of the first annular space, so that the extrusion ring is extruded through the curved surface at the upper end of the second forming mold under the action of mold closing.

5. The die forming apparatus according to claim 1, characterized in that, The outer diameter of the third molding die is the same as that of the first molding die.

6. The template forming apparatus according to claim 1, characterized in that, The upper and lower templates have through holes that extend vertically, and the templates are fixedly connected to the first upper half mold and the first lower half mold through the through holes.

7. The die forming apparatus according to claim 1, characterized in that, The radial dimensions of the upper and lower mold halves are smaller than the radial dimensions of the template.

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