A bending and shaping mold structure and its usage method

Abstract

This invention discloses a mold structure and method for bending and shaping. The mold includes a lower mold part and an upper mold part. The lower mold part of the mold structure provided by this invention is equipped with a first through groove to provide bending and shaping space, and works with a first bending punch to bend the part downward. During the downward movement of the upper mold part, the support body will also move downward with the force. With this as a reference, the insert body located on the periphery of the support body moves upward, providing an upward force, and works with the blanking punch to bend the part upward. The cooperation of the wedge and the shaping part realizes the shaping of the part.

Description

Technical Field

[0001] This invention belongs to the field of mechanical manufacturing, and in particular relates to a mold structure and method for bending and shaping. Background Technology

[0002] In relay electronic products, a support component is used, primarily serving a supporting function. This support component includes four feet for mounting and welding the base plate, and two feet for welding the yoke. The core and other components are mounted in the center of the component. The component is made of hardened #0.8 zinc-nickel white copper (BZn15-20), with a total of six feet distributed in the top and bottom directions. Figure 1-4 As shown.

[0003] During the manufacturing process, the four legs and two legs of this part need to be bent into shape, as follows: Figure 2-4 As shown, currently, this part is formed using a bending punch and a die for stamping. The specific die structure includes:

[0004] 1. Add a rib boss to the end face of the bending punch: Add a rib near the R area on the end face of the bending punch (e.g., Figure 5 As shown), although it is possible to manufacture punches with various combinations of data for each "*", and bend the parts to the required standard, when the thickness or tensile strength (or modulus of elasticity) of the next batch of raw materials changes (hereinafter referred to as material change), it is not possible to reliably bend the parts to the required standard. This method will leave shallow grooves on the parts, reducing the local strength of the parts; the "*" in the tooling drawing has the requirement to adjust the mold to the required standard for the parts.

[0005] 2. Setting a forming radius (R) below the bending die: By setting a forming radius (R) below the bending die, the part is bent to the lowest point of the die, and the outer R area of ​​the bent part is upset, making the outer R area of ​​the part thinner by a certain thickness. Within a certain period, the part will be bent to a qualified state. However, with wear of the bending radius of the punch or the forming radius of the die, or changes in material, including the influence of vibration (accuracy and vibration of the stamping equipment), a long-term balance between tensile stress and compressive stress needs to be established (e.g., ...). Figure 6 As shown in the figure, it becomes very difficult. Slight changes in internal stress can lead to large changes in the angle of the bent part, and the thinning caused by upsetting may increase the height of the part.

[0006] 3. Using one or more of the methods in the first category combined with the method in the second category, as analyzed above, cannot overcome its own shortcomings and cannot effectively guarantee the bending angle and dimensional accuracy of the parts.

[0007] It is under these circumstances that the present invention proposes a mold structure for bending and shaping. Summary of the Invention

[0008] The purpose of this invention is to provide a mold structure for bending and shaping parts, in which a single mold can both bend and shape the parts.

[0009] Therefore, the novel mold structure for bending and shaping provided by the present invention includes:

[0010] The lower mold portion includes a support body for placing the part to be processed, and a first insert, a second insert, a third insert, and a fourth insert distributed around the periphery of the support body. Under external force, the support body can slide against the first insert, the second insert, the third insert, and the fourth insert along the direction of the force. A first through groove is formed between the first insert and the second insert, and between the third insert and the fourth insert, providing bending and shaping space. A second through groove is formed between the first insert and the fourth insert, and between the second insert and the third insert.

[0011] A first shaping member is assembled on the first insert body, the second insert body, the third insert body, and the fourth insert body. One end of the first shaping member extends out of the insert body, and the other end is located inside the insert body. The first shaping member can move in the direction of the force under the action of an external force, and can act on the workpiece to be processed to shape the workpiece. A second shaping member is assembled in the first through groove. One end of the second shaping member extends out of the first through groove, and the other end is located inside the first through groove. The second shaping member can move in the direction of the force under the action of an external force, and can act on the workpiece to be processed to shape the workpiece.

[0012] The upper die part includes a blanking punch, a first bending punch, a second bending punch, a first wedge and a second wedge. The first bending punch and the second bending punch are respectively arranged on the outer periphery of the blanking punch. When the blanking punch is in its natural state, its bottom end is located below the lower end face of the first bending punch and the second bending punch. The blanking punch can move in the direction of the force when subjected to external force.

[0013] The pressing punch matches the support body and is used to press the part to be processed placed on the support body. The first bending punch matches the first through groove and moves down along the first through groove and against the support body during the downward movement of the upper die part to complete the bending of the part to be processed. The lower end of the first bending punch is provided with a relief hole for the second shaping part to pass through, so that the second shaping part can act on the part to be processed under the action of external force to achieve the shaping of the part to be processed.

[0014] The second bending punch matches the second through groove and can slide along the second through groove during operation of the upper die portion;

[0015] The first and second wedges are respectively matched with the first and second shaping parts. When the upper mold part is running, the first and second wedges contact the first and second shaping parts respectively, providing a shaping force that causes the first and second shaping parts to move towards the workpiece to be processed, so that the first and second shaping parts act on the workpiece to complete the shaping of the workpiece.

[0016] The mold structure provided by this invention is configured with a first through slot, providing bending and shaping space, which, together with the first bending punch, achieves downward bending of the part; during the downward movement of the upper mold part, the support body will be subjected to downward force, and with this as a reference, the insert body located on the outer periphery of the support body moves upward, providing upward force, which, together with the pressing punch, bends the part upward; the cooperation of the wedge and the shaping part realizes the shaping of the part.

[0017] In some embodiments, the lower die portion further includes a first elastic element, a first pressure plate, a second pressure plate, and a push rod. The first pressure plate and the second pressure plate are respectively mounted on both ends of the first elastic element. One end of the push rod is mounted on the support plate, and the other end is mounted on the first pressure plate. The upper die portion further includes a second elastic element connected to the pressing punch. The elastic force of the first elastic element is greater than that of the second elastic element. The lengths of the first bending punch and the second bending punch are not equal. This achieves step-by-step bending.

[0018] In some implementations, the first shaping member and the second shaping member are misaligned, thus achieving segmented shaping.

[0019] In some embodiments, the support plate is provided with positioning pins for positioning the part to be processed, which facilitates the positioning of the part to be processed.

[0020] In some embodiments, the first insert, the second insert, the third insert, and / or the fourth insert each include an upper insert and a lower insert. The lower insert has a through groove, through which the first shaping component acts on the workpiece to be processed when subjected to external force. The upper insert is detachably mounted on the lower insert to seal the through groove. This facilitates the replacement and adjustment of the shaping component to ensure that the shaping meets the requirements of the workpiece.

[0021] In some embodiments, the first wedge is detachably mounted on the first wedge fixing block, and a first shim is fitted between the first wedge and the first wedge fixing block for adjusting the shaping amount.

[0022] In some embodiments, the second wedge is detachably mounted on the second wedge fixing block, and a second shim is provided between the second wedge and the second wedge fixing block for adjusting the shaping amount.

[0023] Shims are installed between the wedge and the wedge fixing block. The size / number of the shims can be adjusted to adjust the distance between the wedge and the forming part to meet the forming requirements of the part and adapt to different parts.

[0024] Another objective of this invention is to provide a method for using the novel bending and shaping mold structure provided by this invention. This mold structure is used for bending and shaping a support part, which includes a first long leg, a second long leg, a first short leg, a second short leg, a third short leg, and a fourth short leg to be bent and shaped. The support part is placed on a support body for positioning. The upper mold portion descends, and the pressure punch presses down on the support part. The upper mold portion continues to descend, and the pressure punch retracts along the force direction, still pressing down on the support part. The upper mold portion continues to descend, and the first bending punch acts on the first and second long legs. The upper mold portion continues to descend, and the first bending punch, against the side wall of the support body, enters the first through groove and bends the first and second long legs downwards. The upper mold portion continues to descend, and the support body descends accordingly. The second bending punch enters the second through groove. During the descent of the support body, the first insert, the second insert, the third insert, and the fourth insert are relatively... As the support body moves upward, it provides an upward bending force, which, in conjunction with the pressure punch, bends the first, second, third, and fourth short legs upward. The upper die continues to move downward, and the first wedge acts on the first shaping component, causing the first shaping component located on the first, second, third, and fourth inserts to move towards the bent first, second, third, and fourth short legs respectively and abut against them to achieve shaping. The upper die continues to move downward, and the first shaping component continues to shape each short leg. After moving to a set position, the second wedge acts on the second shaping component, causing the second shaping component located in the first through groove to move towards the bent first and fourth long legs respectively and abut against them to achieve shaping. After the upper die continues to move downward to the set position, the upper die returns, releasing the force applied to the support body, the first shaping component, and the second shaping component. After the upper die returns to the set position, the bent and shaped bracket part can be removed.

[0025] The third objective of this invention is to provide a bending die structure that can perform downward / upward bending on the part to be bent, including:

[0026] The lower mold portion includes a support body for placing the part to be processed, and a first insert, a second insert, a third insert, and a fourth insert distributed around the periphery of the support body. Under the action of an external force, the support body can slide against the first insert, the second insert, the third insert, and the fourth insert along the direction of the force. A first through groove is formed between the first insert and the second insert, and between the third insert and the fourth insert.

[0027] The upper die part includes a blanking punch and a first bending punch. When the blanking punch is in its natural state, its bottom end is located below the lower end face of the first bending punch. The blanking punch can move in the direction of the force when subjected to external force.

[0028] The part to be processed is placed on the support body. The upper die part moves downward, and the pressure punch first presses down on the part to be processed. The upper die part continues to move downward, and the pressure punch is compressed and continues to press down on the part to be processed. The first bending punch slides along the first through groove and against the support body, generating a downward bending force to bend the part to be processed. The upper die part continues to move downward, and the support plate is pushed downward. An upward bending force is generated between the pressure punch and each insert body to bend the part to be processed. After the downward bending and / or upward bending of the part to be processed is completed, the upper die returns to the set position, and the bent part can be taken out.

[0029] A second through groove is formed between the first insert and the fourth insert, and between the second insert and the third insert. The upper die includes a second bending punch that matches the second through groove. The part to be processed is placed on the support body. The upper die descends, and the pressure punch first presses down on the part to be processed. The upper die continues to descend, and the pressure punch is compressed and continues to press down on the part to be processed. The first bending punch slides along the first through groove and against the support body, generating a downward bending force to bend the part to be processed. The upper die continues to descend, and the support plate is pushed down. The second bending punch slides along the second through groove, and an upward bending force is generated between the pressure punch and each insert to bend the part to be processed. After the downward bending and / or upward bending of the part to be processed is completed, the upper die returns to the set position, and the bent part can be taken out.

[0030] The fourth objective of this invention is to provide a shaping mold structure that can shape the portion of a part that needs shaping. The mold structure includes:

[0031] The lower mold portion includes a support body for placing the part to be processed, and a first insert body, a second insert body, a third insert body, and a fourth insert body distributed around the periphery of the support body. Under the action of an external force, the support body can slide against the surfaces of the first insert body, the second insert body, the third insert body, and the fourth insert body along the direction of the force.

[0032] A first shaping component is assembled on the first insert body, the second insert body, the third insert body and the fourth insert body. One end of the first shaping component extends out of the insert body and the other end is located inside the insert body. The first shaping component can move in the direction of the force under the action of external force and can act on the workpiece to be processed to shape the workpiece.

[0033] The upper die portion includes a pressing punch and a first wedge. The pressing punch matches the support body and is used to press the part to be processed placed on the support body. The first wedge matches the first shaping part.

[0034] The part to be processed is placed on the support body. The upper die part moves downward. The pressure punch first presses down on the part to be processed. The upper die part continues to move downward. The pressure punch presses down on the part to be processed and pushes the support body downward to the target position. The first wedge contacts the first shaping part and pushes the first shaping part to move towards the pressure punch to act on the part to be processed and shape the part to be shaped. After the shaping of the part to be processed is completed, the upper die returns and the part can be taken out.

[0035] In some embodiments, at least one first through groove is formed between the first insert, the second insert, the third insert, and the fourth insert. A second shaping member is assembled in the first through groove. One end of the second shaping member extends out of the first through groove, and the other end is located in the first through groove. The second shaping member can move in the direction of the force under the action of an external force and can act on the workpiece to be processed for shaping. The upper mold portion includes a second wedge that matches the second shaping member. During the shaping process, the second wedge contacts the second shaping member and pushes the second shaping member to move towards the workpiece to be processed, acting on the workpiece to shape the part to be shaped.

[0036] Another structure of the shaping mold structure provided by the present invention includes:

[0037] The lower mold portion includes a support body for placing the part to be processed, and a first insert body, a second insert body, a third insert body, and a fourth insert body distributed around the periphery of the support body. At least one first through groove is formed between the first insert body, the second insert body, the third insert body, and the fourth insert body. A second shaping member is assembled in the first through groove. One end of the second shaping member extends out of the first through groove, and the other end is located in the first through groove. The second shaping member can move in the direction of the force under the action of an external force and can act on the part to be processed to shape the part to be processed.

[0038] The upper die portion includes a pressure punch and a second wedge. The pressure punch matches the support body and is used to press down the part to be processed placed on the support body. The second wedge matches the second shaping part.

[0039] The part to be processed is placed on the support body. The upper die descends, and the pressure punch first presses down on the part to be processed. The upper die continues to descend, and the pressure punch continues to press down on the part to be processed. When it reaches the target position, the second wedge contacts the second shaping part and pushes the second shaping part to move towards the pressure punch, acting on the part to be processed to shape the part to be shaped. After the shaping of the part to be processed is completed, the upper die returns, and the part can be taken out.

[0040] In some embodiments, a first shaping member is mounted on the first insert body, the second insert body, the third insert body, and the fourth insert body. One end of the first shaping member extends out of the insert body, and the other end is located inside the insert body. The first shaping member can move in the direction of the force when subjected to an external force, and can act on the workpiece to be processed to shape the workpiece. The upper mold portion includes a first wedge that matches the first shaping member.

[0041] The part to be processed is placed on the support body. The upper die descends, and the pressure punch first presses down on the part to be processed. The upper die continues to descend, and the pressure punch presses down on the part to be processed, pushing the support body down to the target position. The first wedge contacts the first shaping part, pushing the first shaping part to move towards the pressure punch, acting on the part to be processed to shape the part to be shaped. The upper die continues to descend to the target position. The second wedge contacts the second shaping part, pushing the second shaping part to move towards the pressure punch, acting on the part to be processed to shape the part to be shaped. After the shaping of the part to be processed is completed, the upper die returns, and the part can be taken out.

[0042] The beneficial effects achieved by adopting the technical solution of the present invention include: during the bending process, shaping is carried out separately to realize step bending and segment shaping, which is completed by a bending and shaping die. It can adapt to changes in part material, overcome the influence of "noise" in production, adjust the reasonable shaping amount "online" to meet the bending angle accuracy of the part, make the height dimension accuracy of each bending foot controllable, and the die is simple and applicable in terms of manufacturing, repair and use.

[0043] Among them, "noise" refers to: bending clearance, bending punch R and die inlet R size, surface roughness of mold and parts, lubricant grade or dilution degree, and stamping equipment precision. "Online" means that after the mold is assembled and the part is produced by trial molding, there is no need to disassemble the mold. Attached Figure Description

[0044] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention. It is obvious that the drawings described below are merely some embodiments of the invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0045] Figure 1-4 This is a schematic diagram of the existing support component structure described in this invention;

[0046] Figure 5 This is a schematic diagram of the existing bending forming method described in this invention;

[0047] Figure 6-7 This is a schematic diagram illustrating the principle of bending spring force described in this invention;

[0048] Figure 8-10 A schematic diagram of the novel mold structure for bending and shaping provided by the present invention;

[0049] Figure 11 for Figure 10 Enlarged view of a portion of the image;

[0050] The "○" in the attached diagram represents an assembly point or mounting point. Detailed Implementation

[0051] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be comprehensive and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. In the drawings, the dimensions of some elements may be exaggerated or modified for clarity. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0052] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced without one or more of the specific details described, or other methods, elements, etc., can be employed. In other instances, well-known structures, methods, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.

[0053] In relay electronic products, a support component is used. This component primarily serves a supporting function. It includes four legs for mounting and welding the base plate, and two legs for welding the yoke. The core and other components are assembled in the middle of the component. The component is made of hardened #0.8 zinc-copper alloy (BZn15-20), with a total of six legs distributed in the vertical direction. The unformed structure of this component is as follows... Figure 1 As shown, the structure after molding is as follows Figure 2-4 As shown.

[0054] The part requires bending during the forming process, including both downward and upward bending, which involves positive springback. If the neutral layer coefficient of the part is taken as k = 0.41, then kt = 0.41 × 0.8 = 0.328. Normal bending of the part exhibits positive springback. The material in the bending zone is actually: the inner part of the neutral layer (within 0.328) experiences primary internal pressure, manifesting as negative springback, while the outer part of the neutral layer experiences primary external tension (outside 0.328), manifesting as positive springback. (See...) Figure 6 and Figure 7 .

[0055] Obviously, 0.472 > 0.328. After normal bending of the part described above, F (external tensile force) > f (internal pressure). Under normal bending, the bending radius R is R0.8, and the angle must be greater than 90°, just like the bending result of the two legs in the bracket part drawing.

[0056] The bending of the four legs of the support, using a cone-shaped bending punch with ribs on the end face, essentially achieves material transfer within the bending radius (R-zone) through upsetting, ensuring that F < f. In effect, it allows the transferred material to freely extend to the outer region of the neutral layer, making f dominant, thereby eliminating positive springback. Note: The internal stress distribution of the material in the bending radius (R-zone) is complex, but we can simplify by focusing on the primary causes and consequences of the bending effect.

[0057] Based on the above analysis, due to the influence of many factors such as changes in the internal structure and mechanical properties of the part material, the amount and direction of material transfer caused by the bending punch, changes in the bending gap, the size of the bending punch and die R, changes in the surface roughness of the mold and part, and the lubrication condition of the lubricant, it is necessary to establish a balance relationship based on the result f > F to find a suitable bending factor and requirements so that each batch of parts meets the forming requirements. For example, it is impossible to achieve a stable bending angle of 90° ± 0.1° 30' for the four feet of the part, including 90° ± 1° for the two feet.

[0058] In the existing molding process, two feet are bent downwards to form the part, and the angle of the part after bending is about 95°; four feet are bent upwards, and the bending punch is set with a negative angle. A pressure rib is added to its end face to eliminate springback. The "*" indicates the requirement in the tooling drawing to adjust the mold until the part is qualified.

[0059] In addition to bending and forming using the existing methods described in this disclosure, it is also possible to:

[0060] 1. Using the common "oblique wedge method": an oblique slider device is added to the mold to bend and shape the parts. If the pushing amount of the shaping mold is constant, when the material of each batch of parts changes, it is necessary to test the mold and adjust it multiple times according to the actual situation of the parts. At the same time, it is necessary to set a reasonable pressing force and a strict pushing amount, making it difficult to repair the mold to achieve smooth production of parts.

[0061] 2. The "two-step bending forming method" is adopted: the bending angle is decomposed into two steps for forming. The bending is pre-pressed to a certain angle and then bent to the required angle. By changing the inner R value or the distance between the intersection points of the inner R area in the two bending steps, it is necessary to conduct a preliminary verification. If it is used for single-process production, an additional process is required. If it is used in progressive dies, the consistency of the raw materials of the parts must be good, and the die must be highly accurate and wear-resistant. Otherwise, the bending angle and dimensional accuracy of the parts will not be stable.

[0062] Therefore, this invention provides a mold structure for bending and shaping, which enables shaping during the bending process, achieving step-by-step bending and segmented shaping. This mold structure is... Figure 8-11As shown, the die includes a lower mold section and an upper mold section, with a guide rail installed between them for guiding purposes. The lower mold section includes a base 1, a pad 2, a die pad 3, a die 4, a fifth insert 5, a support 6, a first insert 7, a second insert 8, a third insert 9, a fourth insert 10, a limiting post 11, a first elastic element 12, a first pressure plate 13, a second pressure plate 14, and a first ejector pin 15. The base 1, pad 2, die pad 3, and die 4 are assembled together by fasteners such as pins or rivets. The fifth insert 5 is assembled inside the die 4 to fix it in place. This insert is used for pressing the workpiece. The curved part is bent; the bottom end of the support body 6 is assembled with one end of the first push rod 15, and the other end of the first push rod 15 passes through the die pad 3, the pad 2 and the base 1 and is assembled with the first pressure plate 13. The first elastic element 12 is assembled between the first pressure plate 13 and the second pressure plate 14 to provide buffering force and restoring force to ensure that the support body 6 can slowly move down when subjected to downward force and return to the initial position after the external force is released (the position of the support body 6 when the mold is not moving and the first elastic element is not extended or retracted).

[0063] The left and right sidewalls of the support body 6 have protrusions formed near the edges. The first insert 7, the second insert 8, the third insert 9, and the fourth insert 10 have grooves that match the protrusions. The first insert 7, the second insert 8, the third insert 9, and the fourth insert 10 are respectively fitted to the outer periphery of the support body 6 through the grooves and the protrusions, thus realizing the assembly of the support body with each insert. When the support body 6 is subjected to external force, it can move up / down along the direction of the force.

[0064] A first through groove 16 is formed between the first insert 7 and the second insert 8, and between the third insert 9 and the fourth insert 10, providing space for bending and shaping; a second through groove 17 is formed between the first insert 7 and the fourth insert 10, and between the second insert 8 and the third insert 9, providing space for positioning and operation (upward and downward movement of components).

[0065] In this disclosure, a first shaping member 18 is respectively assembled on the first insert body 7, the second insert body 8, the third insert body 9, and the fourth insert body 10. One end of the first shaping member 18 extends out of the insert body, and the other end is located inside the insert body. Under the action of an external force, it can move in the direction of the force and can act on the workpiece to be processed to shape the workpiece. A second shaping member 19 is assembled in the first through groove 16. One end of the second shaping member 19 extends out of the first through groove 16, and the other end is located inside the first through groove 16. Under the action of an external force, the second shaping member 19 can move in the direction of the force and can act on the workpiece to be processed to shape the workpiece.

[0066] In this mold structure, the limiting post 11 is used to limit the downward position of the upper mold part, so as to avoid the lower mold part being damaged due to excessive downward movement of the upper mold part.

[0067] In this disclosure, a mounting plate 20 for assembling the second shaping member 19 is formed on the fifth insert body 5. The mounting plate 20 extends into the first through groove 16. The second shaping member 19 is assembled onto the mounting plate 20 by a first limiting pin 21 and is equipped with a second elastic element 22 to provide the second shaping member 19 with buffering force and restoring force.

[0068] In this disclosure, through slots for assembling the first shaping component 18 are respectively provided on the first insert body 7, the second insert body 8, the third insert body 9 and the fourth insert body 10. The first shaping component 18 is assembled in the through slot by the second limiting pin 23, and is equipped with a third elastic element 24 assembled together with the first shaping component 18 to provide buffering force and restoring force.

[0069] In this disclosure, the upper die portion includes a punch fixing plate 25, a punch pad 26, a pad 27, an upper support 28, a punch handle 29, a screw plug 30, a fourth elastic element 31, a pressure punch 32, a first bending punch 33, a second bending punch 34, a first wedge 35, and a second wedge 36; the structural relationship between the punch fixing plate 25, the punch pad 26, the pad 27, the upper support 28, the punch handle 29, the screw plug 30, and the fourth elastic element 31 is as follows: Figure 8 As shown. The blanking punch 32, the first bending punch 33, and the second bending punch 34 are respectively assembled on the punch fixing plate 25. The first bending punch 33 is located on the left and right sides of the blanking punch 32, and the second bending punch 34 is located on the front and rear sides of the blanking punch 32. When the blanking punch 32 is in its natural state (the state when the mold is not in use), its bottom end is located below the lower end face of the first bending punch and the second bending punch. Under the action of the second ejector rod 37 and the fourth elastic element 31, it can move in the direction of the external force when subjected to external force.

[0070] The first wedge 35 is detachably mounted on the first wedge fixing plate 38 via screws, and a first shim is installed between the first wedge 35 and the first wedge fixing plate 38. The thickness and number of the first shims are set according to the actual situation to match the first shaping part 18 and ensure the effectiveness of shaping; the distance can be adjusted according to the thickness and number of the first shims to meet the shaping needs of different parts.

[0071] The second wedge 36 is detachably mounted on the second wedge fixing plate 39 via screws. A second shim is installed between the second wedge 36 and the second wedge fixing plate 39. The thickness and number of the second shims are set according to actual conditions to match the second shaping part 19 and ensure the effectiveness of shaping. The distance can be adjusted according to the thickness and number of the second shims to meet the shaping needs of different parts.

[0072] The first bending punch 33 has a relief hole for the second forming part to pass through and act on the part to be processed in order to achieve the forming.

[0073] In this mold structure, the number of the first and second oblique wedges is equal to the number of the first and second forming parts, respectively.

[0074] Combination Figure 1 The bracket parts shown herein illustrate the method of using the mold structure of this disclosure. The mold of this disclosure is then assembled onto a machine tool. Figure 1 The bracket part shown is placed on the support body 6, with the first long leg 40 and the second long leg 41 (2 legs) of the part located in the first through groove 16, and the four legs (first short leg 42, second short leg 43, third short leg 44 and fourth short leg 45) located above the first insert body 7, the second insert body 8, the third insert body 9 and the fourth insert body 10 respectively. The machine tool is started so that the upper die part moves downward. The pressing punch 32 first presses down on the bracket part placed on the support body 6. At this time, the support body 6 does not move downward. The upper die part continues to move downward, and the pressing punch 32 continues to press down on the bracket part. The first bending punch 33 moves downward along the first through groove 16 and abuts against the side wall of the support body 16. During the downward movement, the first bending punch 33 bends the two legs located in the first through groove 16, realizing downward bending. The upper die part continues to move downward, so that the support body 6 moves downward accordingly. The first insert body 7, the second insert body 8, the third insert body 9 and the fourth insert body 10 located on the support body 6 are supported by the support body. With reference to 6, the upper die moves upward relative to the support body 6. Under the action of the pressure punch 32, an upward bending force is generated, bending the four legs located above the first insert body 7, the second insert body 8, the third insert body 9, and the fourth insert body 10. The upper die continues to move downward, and the support body 6 also continues to move downward. The first wedge 35 contacts the first shaping part 18, generating a force that causes the first shaping part 18 to press against the bent four legs, thus shaping the four legs. The upper die continues to move downward, and the four legs continue to be shaped by the first shaping part 18. When the upper die moves to the set position, the second wedge 36 contacts the second shaping part 19, generating a force that causes the second shaping part 19 to press against the bent two legs, thus shaping the two legs. The upper die continues to move downward for a while to complete the shaping of the part, and then begins to move upward back. After the upper die returns to the set position, the bent and shaped part can be taken out.

[0075] The actions of the bending and shaping mold disclosed herein are as follows: positioning part → middle pressing → bending two feet → full pressing → bending four feet → shaping four feet → shaping two feet → flattening part → opening each wedge → removing part.

[0076] The mold structure disclosed herein is for Figure 1 The bending and shaping of the two legs of the bracket component shown are achieved as follows:

[0077] (1) Press bending: It is achieved by the first pressing bending punch and the support body. A through groove is set in the middle of the lower end of the first pressing bending punch to provide action space for shaping. The support body is equivalent to the "press bending punch", while the first pressing bending punch is equivalent to the "press bending die". The pressing bending part is the 1.5mm width of the two feet of the part, which is the first action of part forming.

[0078] (2) Shaping: This is achieved by the second inclined wedge and the second shim of the upper mold and the second shaping part of the lower mold. The inclined surface of the second inclined wedge is used to push the inclined surface of the second shaping part to complete the horizontal inward pushing action. The 3mm end part of the shaping part is the 4th action of part forming.

[0079] The mold structure disclosed herein is for Figure 1 The bending and shaping of the four legs of the bracket component shown is achieved as follows:

[0080] (1) Bending: This is achieved by the second bending punch and the first insert, second insert, third insert, fourth insert and support body, and is the second action of part forming.

[0081] (2) The second bending punch of the upper die, the first wedge and the first shim and the first forming part of the lower die are used to push the inclined surface of the first forming part with the inclined surface of the first wedge to complete the horizontal inward pushing action, which is the third action of part forming.

[0082] The mold structure disclosed herein can be used for simultaneous bending and shaping, or for bending or shaping only. When used only for bending, the lower mold portion of the mold structure includes a support body for placing the part to be processed, and a first insert, a second insert, a third insert, and a fourth insert distributed around the periphery of the support body. Under the action of an external force, the support body can slide against the first insert, the second insert, the third insert, and the fourth insert in the direction of the force. A first through groove is formed between the first insert and the second insert, and between the third insert and the fourth insert. The upper mold portion includes a blanking punch and a first bending punch. When the blanking punch is in its natural state, its bottom end is located below the lower end face of the first bending punch. Under the action of an external force, the blanking punch can move in the direction of the force.

[0083] The part to be processed is placed on the support body. The upper die part moves downward, and the pressure punch first presses down on the part to be processed. The upper die part continues to move downward, and the pressure punch is compressed and continues to press down on the part to be processed. The first bending punch slides along the first through groove and against the support body, generating a downward bending force to bend the part to be processed. The upper die part continues to move downward, and the support plate is pushed downward. An upward bending force is generated between the pressure punch and each insert body to bend the part to be processed. After the downward bending and / or upward bending of the part to be processed is completed, the upper die returns to the set position and the bent part can be taken out.

[0084] Combination Figure 1 The bracket component shown can be bent at both the 2nd and 4th legs.

[0085] When used only for shaping, the lower mold portion of this mold structure includes a support body for placing the part to be processed, and a first insert, a second insert, a third insert, and a fourth insert distributed around the periphery of the support body. Under the action of an external force, the support body can slide against the surfaces of the first insert, the second insert, the third insert, and the fourth insert in the direction of the force. A first shaping component is assembled on the first insert, the second insert, the third insert, and the fourth insert. One end of the first shaping component extends out of the insert body, and the other end is located inside the insert body. Under the action of an external force, the first shaping component can move in the direction of the force and act on the part to be processed to shape it. The upper mold portion includes a pressure punch and a first wedge. The pressure punch matches the support body and is used to press down the part to be processed placed on the support body. The first wedge matches the first shaping component.

[0086] Combination Figure 1 The bracket part shown does not include the two legs. After the four legs are processed and shaped by other methods, it is placed on the support body. The upper die part moves downward, and the pressure punch first presses down on the part to be processed. The upper die part continues to move downward, and the pressure punch presses down on the part to be processed, pushing the support body downward to the target position. The first wedge contacts the first shaping part and pushes the first shaping part to move towards the pressure punch, acting on the part to be processed to shape the part to be shaped. After the shaping of the part to be processed is completed, the upper die returns, and the part can be taken out.

[0087] To meet Figure 1 The shaping of the bracket parts with feet 2 and 4 is shown. At least one first through groove is formed between the first insert, the second insert, the third insert, and the fourth insert. A second shaping component is assembled in the first through groove. One end of the second shaping component extends out of the first through groove, and the other end is located in the first through groove. The second shaping component can move in the direction of the force under the action of an external force. Under the action of the external force, it can act on the part to be processed to shape the part to be processed. The upper mold part includes a second wedge that matches the second shaping component.

[0088] Combination Figure 1The bracket part shown is formed by machining the 2-leg and 4-leg parts separately using other methods and then placed on the support body. The upper die part moves downward, and the pressure punch first presses down on the part to be processed. The upper die part continues to move downward, and the pressure punch presses down on the part to be processed, pushing the support body downward to the target position. The first wedge contacts the first shaping part and pushes the first shaping part to move towards the pressure punch, acting on the part to be processed to shape the part to be shaped. The second wedge contacts the second shaping part and pushes the second shaping part to move towards the pressure punch, acting on the part to be processed to shape the part to be shaped. After the shaping of the part to be processed is completed, the upper die returns, and the part can be taken out.

[0089] If only Figure 1 The bracket part shown does not include the part after the 4-leg molding is shaped. Therefore, the lower mold part of the mold structure disclosed herein includes a support body for placing the part to be processed, and a first insert body, a second insert body, a third insert body, and a fourth insert body distributed around the periphery of the support body. At least one first through groove is formed between the first insert body, the second insert body, the third insert body, and the fourth insert body. A second shaping part is assembled in the first through groove. One end of the second shaping part extends out of the first through groove, and the other end is located in the first through groove. The second shaping part can move in the direction of the force under the action of external force, and can act on the part to be processed to shape the part to be processed. The upper mold part includes a pressure punch and a second wedge. The pressure punch matches the support body and is used to press the part to be processed placed on the support body. The second wedge matches the second shaping part.

[0090] Combination Figure 1 The bracket part shown does not include the 4 legs. After the 2 legs are processed and formed by other methods, it is placed on the support body. The upper die part moves down, and the pressure punch first presses down on the part to be processed. The upper die part continues to move down, and the pressure punch continues to press down on the part to be processed. When it moves down to the target position, the second wedge contacts the second shaping part and pushes the second shaping part to move towards the pressure punch to act on the part to be processed and shape the part to be shaped. After the shaping of the part to be processed is completed, the upper die returns and the part can be taken out.

[0091] To facilitate the positioning of the parts to be processed, positioning pins 46 are arranged on the top surface of the support body 6 in the mold structure disclosed herein.

[0092] In this disclosure, the bottom end face of the first bending punch 33 and the bottom end face of the second bending punch 34 are not on the same plane; the bottom end faces of the first wedge and the second wedge are not on the same end face; the first forming part and the second forming part are staggered and configured with the horizontal plane as the reference plane, the first forming part is higher than the second forming part, and they are not in the same vertical direction; step bending and segmented forming are achieved in conjunction with specific upper and lower die parts, which is completed by a set of bending and forming dies, and can adapt to changes in part material.

[0093] Those skilled in the art should understand that, in addition to the above-described methods of using elastic elements to achieve the movement of each part, it is also possible to achieve movement of the parts by using gap assembly without assembling elastic elements. For example, if the first forming part and the insert body are in planar contact, and the external force is greater than the frictional force between them, the first forming part can be moved towards or away from the part to be processed; other parts can also be assembled in the same way as described here.

[0094] In this disclosure, the first insert, second insert, third insert, and fourth insert include an upper insert 47 and a lower insert 48. The lower insert 48 has a through groove for assembling the first forming part. The upper insert 47 is assembled with the lower insert 48 by bolts to seal the through groove. The upper insert 47 and the lower insert 48 are identical, except that the upper insert 47 has a boss on its upper part to protect the first bending punch.

[0095] Compared with existing technologies, this invention patent has the following advantages:

[0096] 1. It can achieve bending and shaping in two directions: downward bending and upward bending, bending in stages and shaping in steps, and can be completed in different spaces and time periods.

[0097] 2. Strong adaptability: This bending and shaping die can achieve independent and constant online fine-tuning of bending gap, part thickness, tensile strength or elastic modulus of raw materials, and stamp the parts of the batch to the required angle and dimensional accuracy. It can adapt to the batch differences of domestic raw materials and meet the requirements.

[0098] 3. All aspects of operation are very convenient: mold fitters can easily manufacture, replace, and repair molds; production staff can smoothly complete the production of parts by assembling and adjusting the mold once.

[0099] 4. Change the wedge propulsion method: The horizontal shaping amount of the part is kept constant using the straight surface of the rear section of the wedge and shaping component; the inclined surface of each wedge or shaping component is only used for the transition of thrust, and fine adjustment is controlled by adding or removing thin shims; a "back-mounted" assembly is adopted, which is easy to manufacture and maintain, and each foot can be shaped independently. Here, "back-mounted" means that the wedge is backed against the wedge fixing block, and the two wedge shims can be added or removed between them for adjustment, and M2 screws are used for fastening.

[0100] 5. The parts after bending and shaping have high angular and dimensional accuracy: combined with Figure 1The bracket part shown, after being bent and shaped using the mold structure disclosed herein, has a bending accuracy of four legs within ±30' and a bending accuracy of two legs within ±20'; the difference in height dimensional accuracy between the four legs and the two legs is within 0.12mm. When the angle of the four legs of the part is approximately 89°40', the part is lightly stuck on the left and right sides of the second bending punch, and the part is ejected by the pressure punch and removed; at other angles, the formed part can be removed when the external force acting on the support body is eliminated and the support body returns to its initial position.

[0101] According to the part forming accuracy requirements (e.g.) Figure 1-4 As shown, bending is performed on the mold, and the shaping can be done at a fixed distance or an adjustable distance to meet the bending angle and dimensional accuracy requirements of the parts. Fixed distance: the shaping amount pushed is constant; Adjustable distance: the shaping amount pushed can be finely adjusted.

[0102] The mold structure disclosed herein is suitable for bending thin, multi-legged copper alloy products, and can meet the requirements of high bending angle and dimensional accuracy, especially for bending #0.8 zinc-copper parts with a hard state. Figure 1 The part shown is made of hardened #0.8 zinc white copper parts bent.

[0103] This disclosure has been described with reference to the foregoing embodiments; however, these embodiments are merely examples for implementing this disclosure. It must be noted that the disclosed embodiments do not limit the scope of this disclosure. On the contrary, any changes and modifications made without departing from the spirit and scope of this disclosure are within the scope of patent protection of this disclosure.

Claims

1. A press bending and shaping die structure, characterized by, The mold includes: The lower mold portion includes a support body for placing the part to be processed, and a first insert, a second insert, a third insert, and a fourth insert distributed around the periphery of the support body. Under external force, the support body can slide against the first insert, the second insert, the third insert, and the fourth insert along the direction of the force. A first through groove is formed between the first insert and the second insert, and between the third insert and the fourth insert, providing bending and shaping space. A second through groove is formed between the first insert and the fourth insert, and between the second insert and the third insert. A first shaping member is assembled on the first insert body, the second insert body, the third insert body, and the fourth insert body. One end of the first shaping member extends out of the insert body, and the other end is located inside the insert body. The first shaping member can move in the direction of the force under the action of an external force, and can act on the workpiece to be processed to shape the workpiece. A second shaping member is assembled in the first through groove. One end of the second shaping member extends out of the first through groove, and the other end is located inside the first through groove. The second shaping member can move in the direction of the force under the action of an external force, and can act on the workpiece to be processed to shape the workpiece. The upper die part includes a blanking punch, a first bending punch, a second bending punch, a first wedge, and a second wedge. The first bending punch and the second bending punch are respectively arranged on the outer periphery of the blanking punch. When the blanking punch is in its natural state, its bottom end is located below the lower end face of the first bending punch and the second bending punch. The blanking punch can move in the direction of the force when subjected to external force. The pressing punch matches the support body and is used to press the part to be processed placed on the support body. The first bending punch matches the first through groove and moves down along the first through groove and against the support body during the downward movement of the upper die part to complete the bending of the part to be processed. The lower end of the first bending punch is provided with a relief hole for the second shaping part to pass through, so that the second shaping part can act on the part to be processed under the action of external force to achieve the shaping of the part to be processed. The second bending punch matches the second through groove and can slide along the second through groove during operation of the upper die portion; The first wedge and the second wedge are respectively matched with the first forming part and the second forming part. When the upper mold part is running, the first wedge and the second wedge contact the first forming part and the second forming part respectively, providing a forming force that causes the first forming part and the second forming part to move in the direction of the workpiece to be processed, so that the first forming part and the second forming part act on the workpiece to be processed to complete the forming of the workpiece to be processed.

2. The press bending and shaping mold structure according to claim 1, wherein, The lower mold portion further includes a first elastic element, a first pressure plate, a second pressure plate, and a push rod. The first pressure plate and the second pressure plate are respectively assembled at both ends of the first elastic element. One end of the push rod is assembled on the support body, and the other end is assembled on the first pressure plate. The upper die portion also includes a second elastic element connected to the pressing punch, wherein the elastic force of the first elastic element is greater than the elastic force of the second elastic element; The lengths of the first bending punch and the second bending punch are not equal.

3. The press bending and shaping mold structure according to claim 1, wherein, The first shaping component and the second shaping component are misaligned.

4. The press bending and shaping mold structure according to claim 1, wherein The support body is provided with positioning pins for positioning the parts to be processed.

5. The mold structure for bending and shaping according to claim 1, characterized in that, The first insert, the second insert, the third insert, and / or the fourth insert each include an upper insert and a lower insert. The lower insert has a through groove. When the first shaping part is subjected to external force, it acts on the workpiece to be processed through the through groove to shape it. The upper insert is detachably assembled onto the lower insert to seal the through groove.

6. The mold structure for bending and shaping according to claim 1, characterized in that, The first wedge is detachably mounted on the first wedge fixing block, and a first shim is mounted between the first wedge and the first wedge fixing block for adjusting the shaping amount.

7. The mold structure for bending and shaping according to claim 1, characterized in that, The second wedge is detachably mounted on the second wedge fixing block, and there is a second shim between the second wedge and the second wedge fixing block for adjusting the shaping amount.

8. The method of using the bending and shaping mold structure according to any one of claims 1-7, characterized in that: The mold structure is used to bend and shape the bracket part, which includes a first long leg, a second long leg, a first short leg, a second short leg, a third short leg, and a fourth short leg that need to be bent and shaped. The bracket part is placed on the support body for positioning, the upper mold part moves downward, and the pressing punch presses the bracket part. As the upper die continues to descend, the pressure punch retracts along the force direction, still pressing down on the support part; as the upper die continues to descend, the first bending punch acts on the first and second long legs, and as the upper die continues to descend, the first bending punch enters the first through groove against the side wall of the support body, bending the first and second long legs downwards; as the upper die continues to descend, the support body descends accordingly, and the second bending punch enters the second through groove. During the descent of the support body, the first, second, third, and fourth inserts move upwards relative to the support body, providing an upward bending force, and in conjunction with the pressure punch, bending the first, second, third, and fourth short legs upwards; as the upper die continues to descend, the first wedge acts on the first shaping part, causing the first shaping parts located on the first, second, third, and fourth inserts to move towards the bent first, second, third, and fourth short legs respectively and abut against them to achieve shaping; The upper mold continues to descend, and the first shaping component continues to shape each short leg. After descending to the set position, the second wedge acts on the second shaping component, causing the second shaping component located in the first through groove to move towards the first and second long legs that have been bent and to abut against them to achieve shaping. After the upper mold continues to descend to the set position, the upper mold returns, releasing the force applied to the support body, the first shaping component, and the second shaping component. After the upper mold returns to the set position, the bracket part that has been bent and shaped can be taken out.

9. A bending die structure, characterized in that, The mold structure includes: The lower mold portion includes a support body for placing the part to be processed, and a first insert, a second insert, a third insert, and a fourth insert distributed around the periphery of the support body. Under the action of an external force, the support body can slide against the first insert, the second insert, the third insert, and the fourth insert along the direction of the force. A first through groove is formed between the first insert and the second insert, and between the third insert and the fourth insert. The upper die part includes a blanking punch and a first bending punch. When the blanking punch is in its natural state, its bottom end is located below the lower end face of the first bending punch. The blanking punch can move in the direction of the force when subjected to external force. A second through groove is formed between the first insert and the fourth insert, and between the second insert and the third insert. The upper die includes a second bending punch that matches the second through groove. The part to be processed is placed on the support. The upper die descends, and the pressure punch first presses down on the part to be processed. The upper die continues to descend, and the pressure punch is compressed and continues to press down on the part to be processed. The first bending punch slides along the first through groove and against the support, generating a downward bending force to bend the part to be processed. The upper die continues to descend, and the support is pushed down. The second bending punch slides along the second through groove, and an upward bending force is generated between the pressure punch and each insert to bend the part to be processed. After the downward and upward bending of the part to be processed is completed, the upper die returns to the set position, and the bent part can be taken out.

10. A shaping mold structure, characterized in that, The mold structure includes: The lower mold portion includes a support body for placing the part to be processed, and a first insert body, a second insert body, a third insert body, and a fourth insert body distributed around the periphery of the support body. At least one first through groove is formed between the first insert body, the second insert body, the third insert body, and the fourth insert body. A second shaping member is assembled in the first through groove. One end of the second shaping member extends out of the first through groove, and the other end is located in the first through groove. The second shaping member can move in the direction of the force under the action of an external force and can act on the part to be processed to shape the part to be processed. The upper die includes a pressure punch and a second wedge. The pressure punch matches the support body and is used to press down the part to be processed placed on the support body. The second wedge matches the second shaping component. A first shaping component is assembled on the first insert body, the second insert body, the third insert body, and the fourth insert body. One end of the first shaping component extends out of the insert body, and the other end is located inside the insert body. The first shaping component can move in the direction of the force under the action of external force and can act on the part to be processed to shape the part to be processed. The upper mold portion includes a first wedge that matches the first forming part; The part to be processed is placed on the support body. The upper die descends, and the pressure punch first presses down on the part to be processed. The upper die continues to descend, and the pressure punch presses down on the part to be processed, pushing the support body down to the target position. The first wedge contacts the first shaping part, pushing the first shaping part to move towards the pressure punch, acting on the part to be processed to shape the part to be shaped. The upper die continues to descend to the target position. The second wedge contacts the second shaping part, pushing the second shaping part to move towards the pressure punch, acting on the part to be processed to shape the part to be shaped. After the shaping of the part to be processed is completed, the upper die returns, and the part can be taken out.

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