Forming equipment and method for special-shaped parts

Abstract

The present invention discloses a forming device and method for a special-shaped material, wherein the device includes an upper mold unit and a lower mold unit; the upper mold unit has a first body and a second body, the lower mold unit has a third body and a fourth body, the first body can move toward the preformed special-shaped material to cooperate with the third body to form a first working part located in the middle by pressing; the second body can be engaged with the first body and the third body to move toward the preformed special-shaped material to cooperate with the fourth body to synchronously form the remaining first working part and second working part by pressing; the second body can shape a convex part corresponding to the arc-shaped concave part on the preformed first working part during the forming process of the second working part. The present invention includes at least the following advantages: adding an arc-shaped convex part to the part corresponding to the curved surface structure can effectively enhance the strength of the corresponding position, thereby effectively avoiding the occurrence of the above-mentioned cracking phenomenon.

Description

Technical Field

[0001] The invention relates to the technical field of material forming, and in particular to a forming device and method for special-shaped material. Background Art

[0002] The description in this section merely provides background information related to the present disclosure and does not constitute prior art.

[0003] The forming of thin sheet parts is a common process in the existing technology, and the forming of the front heavy beam of an automobile is a manifestation of the above-mentioned thin sheet part forming. At present, the two methods of forming the front heavy beam of an automobile are usually drawn or pressed into a mold, and both have certain disadvantages in the forming process.

[0004] The drawing process requires the application of tension to the periphery of the front heavy beam during the forming process of the front heavy beam of the automobile, which requires the corresponding force-bearing structure to be set on the front heavy beam of the automobile, thereby increasing the generation of waste and the investment cost. For mold pressing, the corresponding parts will be short of material and cracks will occur due to the need for curved surfaces.

[0005] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the present invention and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because these solutions are described in the background technology section of the present invention. Summary of the invention

[0006] In order to overcome the defects in the prior art, an embodiment of the present invention provides a forming device and method for special-shaped parts, which adds an arc-shaped protrusion to the part corresponding to the curved surface structure, which can effectively enhance the strength of the corresponding position and effectively avoid the occurrence of the above-mentioned cracking phenomenon.

[0007] The embodiment of the present application discloses: a forming device for a special-shaped material, wherein the special-shaped material comprises three first working parts located in a horizontal plane and two second working parts located in a vertical plane, wherein the first working parts and the second working parts are connected end to end in sequence, wherein at least one of the second working parts has an arc-shaped recessed part, and the forming device comprises an upper mold unit and a lower mold unit capable of being buckled with the upper mold unit;

[0008] The upper mold unit comprises a first body and a second body, wherein the first body is arranged corresponding to the first working part located in the middle, and the second body is arranged corresponding to the two second working parts located outside;

[0009] The lower mold unit has a third body and a fourth body, wherein the third body is arranged corresponding to the first body, and the fourth body is arranged corresponding to the second body;

[0010] The first body is capable of moving toward the preformed special-shaped material part to cooperate with the third body to form the first working part located in the middle through pressing;

[0011] The second body can be fastened with the first body and the third body and can move toward the preformed special-shaped material piece to cooperate with the fourth body to synchronously form the remaining first working part and the second working part through pressing;

[0012] The second body can, during the molding process of the second working part, shape a convex portion corresponding to the arc-shaped concave portion on the pre-molded first working part.

[0013] Furthermore, the protrusion degree of the protrusion portion is directly proportional to the depression degree of the depression portion.

[0014] Furthermore, the side walls of the second body and the third body can form a contoured cavity for molding the second working portion.

[0015] Furthermore, the lower mold unit is provided with a plurality of first position-limiting members, which are distributed around the preformed special-shaped material and can abut against the side wall of the preformed special-shaped material.

[0016] Furthermore, the upper mold unit and / or the lower mold unit is provided with a second limiting member capable of passing through a through hole of the preformed special-shaped material part.

[0017] Furthermore, both the first body and the second body are provided with elastic members extending along the pressing direction.

[0018] The embodiment of the present application also discloses: a forming method of a special-shaped material, the special-shaped material comprises three first working parts located in a horizontal plane and two second working parts located in a vertical plane, the first working parts and the second working parts are connected end to end in sequence, and the forming method comprises the following steps;

[0019] Punching a sheet of a special-shaped material to be processed to complete the positioning of at least one position on the special-shaped material to be processed;

[0020] Preforming the blanked and punched irregularly shaped workpiece by a mold to complete the forming of the first working part located in the middle;

[0021] The first working part that has been preformed is fixed and two opposite sides thereof are bent to respectively complete the forming of the remaining two first working parts and two second working parts, wherein at least one of the second working parts has an arc-shaped recessed portion, and the above-mentioned bending action includes:

[0022] Taking the fixed first working part as a reference, pressing two opposite sides of the first working part and bending them along a first direction, at this time, the two preformed second working parts are pressed against the side wall of the jig to form the formed second working part;

[0023] The preformed first working portion has a streamlined edge portion through jig shaping, and is formed synchronously with the second working portion, wherein a convex portion extending outward is formed at the first working portion corresponding to the arc-shaped recessed portion.

[0024] Furthermore, the two first working parts located at the periphery are trimmed to remove excess waste.

[0025] Furthermore, the first working part located in the middle is punched, and the mechanical limiting method of the hole wall can limit the offset movement of the first working part within the plane where the first working part is located.

[0026] With the help of the above technical scheme, the beneficial effects of the present invention are as follows: under the requirement of curved surface forming, the strength of the corresponding position can be effectively enhanced by forming the raised portion, thereby effectively avoiding the occurrence of cracking; in addition, on the basis of solving the above-mentioned cracking phenomenon, the mold forming method in the present application can save about 10% of the raw materials for each part compared to the original drawing forming. In mass production, it can effectively save investment costs and effectively improve economic benefits.

[0027] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 is a schematic structural diagram of a special-shaped material in an embodiment of the present invention;

[0030] Figure 2 Schematic diagram of the structure of the lower mold unit under one of the workstations in an embodiment of the present invention;

[0031] Figure 3 is a schematic diagram of a partial device structure at another workstation in an embodiment of the present invention;

[0032] Figure 4It is a schematic structural diagram of the lower die unit under another working station in the embodiment of the present invention;

[0033] Figure 5 It is a flowchart of the method in the embodiment of the present invention.

[0034] Reference numerals of the above drawings: 1, the first working part; 2, the second working part; 3, the concave part; 4, the convex part; 5, the third body; 6, the fourth body; 7, the first limiting part; 8, the second limiting part; 9, the first body. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] It should be noted that in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and to distinguish similar objects, and there is no sequence between them, nor can they be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0037] Combined with Figures 1 to 4 As shown, in this embodiment, a forming device for special-shaped workpieces is disclosed. The forming device is used to press a preformed special-shaped workpiece in a sheet shape into a special-shaped workpiece with a required shape. The special-shaped workpiece includes three first working parts 1 located in the horizontal plane and two second working parts 2 located in the vertical plane. The first working part 1 and the second working part 2 are connected end to end in sequence to form a special-shaped workpiece in a "Ji" shape, and an arc-shaped concave part 3 is provided on one of the second working parts 2.

[0038] In this embodiment, the forming device includes an upper die unit and a lower die unit that can be buckled with the upper die unit. It should be noted that the upper die unit has a first body 9 and a second body. The first body 9 is correspondingly arranged with the first working part 1 in the middle, and the second body is correspondingly arranged with the remaining first working parts 1 and second working parts 2. The first body 9 and the second body can move independently towards the lower die unit respectively. The lower die unit has a third body 5 and a fourth body 6. The third body 5 is correspondingly arranged with the first body 9, and the fourth body 6 is correspondingly arranged with the second body. It should be noted that the upper end surface of the third body 5 is above the upper end surface of the fourth body 6.

[0039] Through the above setting method, the first body 9 and the second body can move synchronously towards the lower die unit under an external driving force. Through the cooperation between the first body 9 and the third body 5, the first working part 1 located at the middle position can be press-formed. The second body can continue to move downward越过 the first body 9. At this time, the side wall of the second body and the side wall of the third body 5 can form a profiling cavity for forming the second working part 2 until the second body and the fourth body 6 cooperate to press-form the remaining first working parts 1. It should be noted that during the forming process of the arc-shaped recessed part 3 on the second working part 2, a convex part 4 corresponding to the arc-shaped recessed part 3 is first shaped on the pre-formed remaining first working parts 1. Through the forming of the convex part 4, the strength of the corresponding position can be effectively enhanced, and thus the above-mentioned cracking phenomenon can be effectively avoided.

[0040] It should be noted that the protruding degree of the convex part 4 is in a direct proportional relationship with the recessed degree of the recessed part 3, and the proportionality coefficient K is between 1 and 1.2.

[0041] In this embodiment, a plurality of first limit members 7 are provided on the lower die unit. When the pre-formed special-shaped workpiece is placed on the lower die unit, preferably, the plurality of first limit members 7 are located on the periphery of the pre-formed special-shaped workpiece and can abut against the side wall of the pre-formed special-shaped workpiece, so as to play effective positioning, guiding and other roles during the placing process and subsequent pressing process.

[0042] In this embodiment, after the first working part 1 and the second working part 2 are formed, trimming and other processes need to be performed on them. At this time, in order to ensure the accuracy of trimming, the position of the special-shaped workpiece needs to remain unchanged. In view of the above situation, in this application, through holes are punched on the first working part 1, and a second limit member 8 that can pass through the through holes is provided on the lower die. The position of the special-shaped workpiece can be effectively prevented from moving through mechanical limiting.

[0043] In this embodiment, since the special-shaped workpiece is in the shape of a thin sheet, in order to prevent excessive pressing, elastic members extending along the pressing direction are provided on both the first body 9 and the second body of this application. The deformation setting of the elastic members can better compensate for the formation of excessive pressing.

[0044] Combined with Figure 5 As shown, in this embodiment, a method for forming a special-shaped workpiece is also disclosed. The special-shaped workpiece includes three first working parts 1 located in the horizontal plane and two second working parts 2 located in the vertical plane. The first working part 1 and the second working part 2 are connected end to end in sequence to form a special-shaped workpiece similar to a "Ji" shape.

[0045] The above-mentioned molding method comprises the following steps:

[0046] The sheet-shaped irregular material to be processed is transported to a preset position and punched. This step mainly forms a positioning reference structure on the surface of the irregular material to be processed. The positioning reference structure can be in the form of a positioning through hole, a positioning notch, etc.

[0047] The mold pre-pressing is performed on the irregularly shaped material to be processed after the blanking and punching process. In this step, the irregularly shaped material to be processed is placed in the lower mold, and the positioning accuracy of the irregularly shaped material to be processed can be effectively guaranteed through the above-mentioned positioning through holes, positioning notches and other features; then the upper mold is brought into contact with the irregularly shaped material to be processed and then moves toward the lower mold to complete the molding of the first working part 1 located in the middle position.

[0048] Taking the fixed first working part 1 as a reference, the remaining first working part 1 and second working part 2 are formed by a pressing process. Specifically, the upper mold is composed of two parts, one of which is arranged corresponding to the first working part 1 located in the middle position, and the other part includes two synchronously moving mold cores located on opposite sides of the first working part 1, so the upper mold has two relatively independent pressing actions toward the lower mold.

[0049] In the above steps, the upper mold corresponding to the first working part 1 located in the middle position can always abut against the first working part 1 and press the lower mold; the other part of the upper mold can continue to move toward the lower mold to press the two sides of the first working part 1 in the middle and bend downward. During the bending process, the above two sides can deform to fit the side wall of the lower mold, and then be pressed into forming the second working part 2.

[0050] It is worth noting that during the molding process of the above-mentioned second working part 2, the two pre-formed first working parts 1 can be shaped to have streamlined edges through the corresponding upper mold, and the remaining first working parts 1 can be formed between the lower surface of the above-mentioned remaining upper mold and the upper surface of the lower mold.

[0051] It is worth noting that, according to the needs, the second working part 2 has an arc-shaped recessed portion 3. The edge portion and the position corresponding to the arc-shaped recessed portion 3 are shaped in advance to form a protrusion 4 extending outward. If the above-mentioned protrusion 4 is not formed, the arc-shaped recessed portion 3 will crack at the corresponding position of the first working part 1 during the formation process due to the shortage of material, thereby causing the material to be scrapped; and by forming the above-mentioned protrusion 4, the strength of the corresponding position can be effectively enhanced, thereby effectively avoiding the occurrence of the above-mentioned cracking phenomenon. On the basis of solving the above-mentioned cracking phenomenon, the mold forming method in this application can save about 10% of raw materials for each material compared to the original drawing forming. In mass production, it can effectively save investment costs and effectively improve economic benefits.

[0052] After the molding of the first working part 1 and the second working part 2 is completed, the two first working parts 1 located at the periphery are trimmed to remove excess waste. In addition, when remolding other positions on the first working part 1 and the second working part 2, the first working part 1 located in the middle can be punched, and the mechanical limiting method of the hole wall can limit the misalignment movement of the first working part 1 within the plane where the first working part 1 is located.

[0053] The present invention uses specific embodiments to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A forming device for a special-shaped workpiece. The special-shaped workpiece includes three first working parts located in a horizontal plane and two second working parts located in a vertical plane. The first working parts and the second working parts are sequentially connected end to end to form a special-shaped workpiece in a "ji" shape, and at least one of the second working parts has an arc-shaped recess. It is characterized in that, It includes an upper mold unit and a lower mold unit capable of being buckled with the upper mold unit; The upper mold unit comprises a first body and a second body, wherein the first body is arranged corresponding to the first working part located in the middle, and the second body is arranged corresponding to the two second working parts located outside; The lower mold unit has a third body and a fourth body, wherein the third body is arranged corresponding to the first body, and the fourth body is arranged corresponding to the second body; The first body is capable of moving toward the preformed special-shaped material part to cooperate with the third body to form the first working part located in the middle through pressing; The second body can move toward the preformed special-shaped material after the first body and the third body are buckled, so as to cooperate with the fourth body to synchronously form the remaining first working part and the second working part through pressing; Wherein, during the molding process of the second working part, the second body can shape a convex part corresponding to the arc-shaped concave part on the pre-molded first working part; The protrusion degree of the protrusion part is in direct proportion to the depression degree of the depression part; The side walls of the second body and the third body can form a contoured cavity for molding the second working part.

2. The forming equipment for special-shaped parts according to claim 1, characterized in that: The lower mold unit is provided with a plurality of first position-limiting members, which are distributed around the preformed special-shaped material and can abut against the side wall of the preformed special-shaped material.

3. The forming equipment for special-shaped parts according to claim 1, characterized in that: The upper mold unit and / or the lower mold unit is provided with a second limiting member capable of passing through a through hole of the preformed special-shaped material part.

4. The forming equipment for special-shaped parts according to claim 1, characterized in that: The first body and the second body are both provided with elastic members extending along the pressing direction.

5. A forming method for a special-shaped workpiece, based on the forming equipment according to any one of claims 1-4, the special-shaped workpiece includes three first working parts located in a horizontal plane and two second working parts located in a vertical plane, the first working parts and the second working parts are connected end to end in sequence to form a special-shaped workpiece in a "Ji" shape, characterized in that, The molding method comprises the following steps: Punching a sheet of a special-shaped material to be processed to complete the positioning of at least one position on the special-shaped material to be processed; Preforming the blanked and punched irregularly shaped workpiece by a mold to complete the forming of the first working part located in the middle; The first working part that has been preformed is fixed and two opposite sides thereof are bent to respectively complete the forming of the remaining two first working parts and two second working parts, wherein at least one of the second working parts has an arc-shaped recessed portion, and the above-mentioned bending action includes: Taking the fixed first working part as a reference, pressing two opposite sides of the first working part and bending them along a first direction, at this time, the two preformed second working parts are attached to the side wall of the lower mold unit and pressed into the formed second working part; The preformed first working part is shaped by the upper mold unit to have a streamlined edge portion and is formed synchronously with the second working part, wherein a convex portion extending outward is formed at the first working part corresponding to the arc-shaped recessed portion.

6. The method for forming a special-shaped part according to claim 5, characterized in that: The method further comprises the following steps: trimming the two first working parts located at the periphery to remove excess waste.

7. The method for forming a special-shaped part according to claim 5, characterized in that: The following steps are also included: The first working part located in the middle is punched, and the mechanical limiting method of the hole wall can limit the offset movement of the first working part within the plane where the first working part is located.

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