Machining die and machining method for part with flanged hole

Abstract

The present invention relates to a machining die and machining method for a part with a flanged hole. The machining die comprises an upper die holder, a lower die holder, a female die, a blank holder, a material to be subjected to machining, a heating device and a machining device, wherein the heating device is used for heating said material; and the machining device comprises, from left to right in a first direction, a pre-extrusion assembly, a punching assembly, an extrusion assembly and a blanking assembly, the pre-extrusion assembly being used for enabling said material to form a boss, the punching assembly being used for punching said material that has formed the boss, the extrusion assembly being used for enabling said material to reach a preset size, and the blanking assembly being used for stamping and blanking said material that has reached the preset size. Since the entire machining process is completed on one machining die, the operation is convenient; and under the cooperation between the heating device and the machining device, a part with a flanged hole that has a required size can be obtained.

Description

A processing mold and processing method for parts with flip holes Technical Field

[0001] The invention relates to the field of processing parts with flanging holes, and in particular to a processing die and a processing method for parts with flanging holes. Background Art

[0002] In addition to processing flat workpieces, early fineblanking processes were often combined with other forming processes to create more complex products. The part with a punched hole, shown in Figure 1, has a partially punched hole and requires fineblanking for its outer shape. This is a typical example of a composite part formed using fineblanking and extrusion.

[0003] As shown in Figure 1, if t1≤t and d2≤d are required, the existing technology can be used to process them. The process is as follows: (1) punching d1, (2) extruding countersink cd, and (3) blanking D. However, if the part with a flip hole requires t1≥t, or d2≥d, that is, the part with a flip hole requires the bump to be higher or wider, the existing technology will not be able to meet the size requirements after forming due to insufficient material volume. Summary of the Invention

[0004] To this end, it is necessary to provide a processing mold and processing method for parts with flip holes, which can be used to solve the technical problem that when the parts with flip holes require the protrusions to be higher or wider, the existing technology cannot meet the size requirements after forming due to insufficient material volume.

[0005] To achieve the above-mentioned objectives, in the first aspect, the inventor provides a processing mold with a flip-hole part, comprising an upper mold base, a lower mold base, a die, a pressure ring, a material to be processed, a heating device and a processing device, the pressure ring is located above the die, an upper mold base is provided above the pressure ring, and a lower mold base is provided below the die; the material to be processed is placed between the pressure ring and the die, and through holes for the processing device to extend and move are provided in the pressure ring and the die, and the processing device is used to act on the material to be processed; the heating device is used to heat the material to be processed, and the processing device includes a pre-extrusion component, a punching component, an extrusion component and a blanking component from left to right along the first direction, the pre-extrusion component is used to form a boss in the material to be processed, the punching component is used to punch the material to be processed with the boss formed, the extrusion component is used to make the material to be processed reach a preset size, and the blanking component is used to stamp and blank the material to be processed that has reached the preset size.

[0006] Different from the existing technology, the technical solution of this application first locally heats the material to be processed through a heating device; secondly, a portion of the material is transferred to the lower part through a pre-extrusion component to form a prefabricated boss; thirdly, a hole is punched through a punching component, at this time, a hole wall equal to the height of the prefabricated boss is formed; then, further extrusion is performed through the extrusion component to further increase the height of the hole wall to meet the dimensional requirements after forming (i.e., meeting t1 ≥ t, or d2 ≥ d). Finally, the blanking component punches and blanks the formed part to obtain the target part. The entire processing process is completed on a processing mold, which is easy to operate and can obtain a part with a flip hole of the required size with the cooperation of the heating device and the processing device.

[0007] As an embodiment of the present invention, the heating device is arranged on the left side of the pre-extrusion assembly. The heating device includes an upper sensor and a lower sensor. The upper sensor is installed in the pressure ring and the lower sensor is installed in the die. The upper sensor and the lower sensor cooperate to heat the material to be processed.

[0008] In this way, the upper and lower sensors work together to locally heat the material being processed, making it easier to control. In-mold heating technology heats the material in the extrusion deformation zone within the mold, improving its plasticity and reducing its resistance to deformation. Furthermore, it ensures that the temperature of the material in the extrusion deformation zone does not drop due to prolonged material transfer.

[0009] As an embodiment of the present invention, the pre-extrusion assembly includes a pre-extrusion punch and a pre-extrusion counter-pressure piece, the output end of the pre-extrusion punch is located in the pressure ring, and the output end of the pre-extrusion counter-pressure piece is located in the pre-extrusion through-hole of the die; the punching assembly includes a punching punch and a punching counter-pressure rod, the output end of the punching punch is located in the pressure ring, and the output end of the punching counter-pressure rod is located in the punching through-hole of the die; the extrusion assembly includes an extrusion punch and an extrusion counter-pressure piece, the output end of the extrusion punch is located in the pressure ring, and the output end of the extrusion counter-pressure piece is located in the extrusion through-hole of the die; the blanking assembly includes a blanking punch and a blanking counter-pressure piece, the output end of the blanking punch is located in the pressure ring, and the output end of the blanking counter-pressure piece is located in the blanking through-hole of the die.

[0010] In this way, the pre-extrusion punch moves downward under the action of the blanking force provided by the equipment, extruding the material to be processed on the die, and the material to be processed is transferred to the pre-extrusion through-hole to form a boss. The function of the pre-extrusion counter-pressure piece is to press the bottom of the boss against the back pressure of the equipment after the equipment slider returns, so that the material to be processed is separated from the die. The punching punch punches the pre-extruded material to be processed under the action of the blanking force. After the equipment slider returns, the punching counter-pressure rod pushes the punched waste out of the die under the back pressure provided by the equipment. The extrusion punch moves downward under the action of the blanking force, and at the same time, the extrusion counter-pressure piece moves downward to complete the extrusion forming. After the equipment slider returns, the extrusion counter-pressure piece presses the bottom of the boss against the back pressure to separate the material to be processed from the die. The blanking punch moves downward under the action of the blanking force, and at the same time, the blanking counter-pressure piece tightly presses the material to be processed, completing the fine blanking under the action of three-way compressive stress. After the equipment slider returns, the blanking counter-pressure piece pushes the fine blanked part out of the die to obtain the target part.

[0011] As an embodiment of the present invention, the processing mold with the hole-flipping part also includes a punch pad, a punch fixing plate and a die pad; the punch pad and the punch fixing plate are arranged below the upper die base, and the fixed ends of the pre-extrusion punch, the punching punch, the extrusion punch and the blanking punch are fixed on the punch pad by the punch fixing plate; the die pad is arranged between the lower die base and the die, and the lower ends of the pre-extrusion back pressure piece, the punching back pressure rod, the extrusion back pressure piece and the blanking back pressure piece pass through the die pad and extend into the lower die base.

[0012] In this way, by setting a pad between the punch and the upper die base and between the die and the lower die base, the pad can directly bear and disperse the pressure transmitted by the punch or die, so as to reduce the unit pressure on the die base and protect the die base from being damaged by the end face of the punch or die.

[0013] As an embodiment of the present invention, a V-shaped gear ring is provided at the corresponding position of the bottom of the pressure ring and the top of the die, and the V-shaped gear ring is used to press the material to be processed to limit the flow of the material to be processed in the horizontal direction.

[0014] In this way, by setting a V-shaped gear ring on the blank holder and the die surface, the material can be further prevented from flowing horizontally during the extrusion process, thereby improving the hole wall height filling rate and the quality of the blanking shear surface.

[0015] As an embodiment of the present invention, arc-shaped raised points are provided at corresponding positions on the bottom of the blank holder and the top of the die, and the arc-shaped raised points are used to press into the material to be processed to limit the flow of the material to be processed in the horizontal direction.

[0016] In this way, the arc-shaped protrusion can, on the one hand, prevent the material from flowing horizontally during the extrusion process; on the other hand, compared with the V-shaped gear ring, its processing and manufacturing is easier and the manufacturing cost is lower, thereby reducing the processing cost of the processing mold.

[0017] As an embodiment of the present invention, two symmetrically distributed guide holes are provided between the heating device and the processing device and between two adjacent components of the processing device. The guide holes are used to cooperate with the guide pins to accurately position the material to be processed.

[0018] In this way, the existence of the guide hole can accurately position the material to be processed through the guide pins on the mold, thereby improving the processing accuracy.

[0019] As an embodiment of the present invention, the processing mold with the hole-flanging part further includes an automatic feeder, which is used to transport the material to be processed along the first direction so that the processing device can process the material to be processed in sequence.

[0020] In this way, the four components of the processing device can process the materials to be processed in sequence through the automatic feeder.

[0021] As an embodiment of the present invention, the processing mold with the hole-turning part also includes a pressure rod, the upper end of the pressure rod is located in the upper mold base, and the lower end of the pressure rod is connected to the top of the pressure ring.

[0022] In this way, the blank holding force of the equipment is transmitted to the blank holding ring through the blank holding rod, which squeezes the blank holding ring downward, thereby compacting the material to be processed. Especially when the blank holding ring and the die surface are equipped with a V-shaped gear ring, it is necessary to pre-press the V-shaped gear ring into the material to be processed to prevent the material from flowing horizontally, thereby improving the hole wall height filling rate and the quality of the blanking shear surface.

[0023] To achieve the above-mentioned purpose, in a second aspect, the inventor provides a method for processing a part with a flanging hole, comprising any one of the processing dies for the part with a flanging hole provided by the inventor above, and further comprising the following steps:

[0024] The material to be processed is placed between the blank holder and the die, and the blank holder and the die press the material to be processed;

[0025] The heating device locally heats the material to be processed;

[0026] The pre-extrusion component extrude the locally heated material to be processed, and the material to be processed is deformed to form a boss;

[0027] The punching assembly punches holes in the material to be processed after the boss is formed;

[0028] The extrusion assembly squeezes the punched material again, causing the material to deform, further increasing the height of the boss hole wall, and the material to be processed reaches a preset size;

[0029] The blanking component punches and blanks the material to be processed that has reached the preset size to obtain parts with flipped holes.

[0030] Different from the existing technology, the technical solution of this application adopts a five-station fine blanking hot extrusion continuous die, and processes parts that meet the size requirements through five steps of heating, pre-extrusion, punching, extrusion and blanking. Specifically, first, the heating device locally heats the material to be processed; secondly, part of the material is transferred to the lower part through the pre-extrusion component to form a prefabricated boss; thirdly, the punching component is used to punch a hole, and a hole wall with the same height as the prefabricated boss will be formed at this time; then, the extrusion component is used for further extrusion to further increase the height of the hole wall to meet the size requirements after forming (that is, t1≥t, or d2≥d). Finally, the blanking component punches and blanks the formed part to obtain the target part. The entire processing process is completed on a processing die, which is easy to operate and can obtain parts with flip holes of the required size with the cooperation of the heating device and the processing device.

[0031] The above-mentioned records related to the content of the invention are only an overview of the technical solution of this application. In order to enable ordinary technicians in this field to understand the technical solution of this application more clearly, and then implement it according to the text of the specification and the contents recorded in the drawings, and to make the above-mentioned purposes and other purposes, features and advantages of this application easier to understand, the following is an explanation in combination with the specific implementation methods and drawings of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, characteristics and effects of the specific embodiments of this application and other related contents, and are not to be considered as limiting this application.

[0033] In the drawings of the specification:

[0034] FIG1 is a schematic diagram of a part with a hole in the background art;

[0035] FIG2 is a schematic diagram of a processing mold according to an embodiment of the present application;

[0036] Figure 3 is an enlarged view of A in Figure 2;

[0037] FIG4 is a schematic diagram showing that the slide of the device according to one embodiment of the present application has reached the bottom dead center and the forming of the material to be processed has been completed;

[0038] FIG5 is a diagram showing the steps of processing a mold according to an embodiment of the present application;

[0039] FIG6 is a schematic diagram of the effect of a heating device on a material to be processed according to an embodiment of the present application;

[0040] FIG7 is a schematic diagram of the effect of a pre-extrusion assembly on a material to be processed according to one embodiment of the present application;

[0041] FIG8 is a schematic diagram of the punching assembly acting on a material to be processed according to one embodiment of the present application;

[0042] FIG9 is a schematic diagram of the effect of an extrusion assembly on a material to be processed according to an embodiment of the present application;

[0043] FIG10 is a schematic diagram of the effect of the blanking assembly on the material to be processed according to one embodiment of the present application.

[0044] The reference numerals in the above drawings are described as follows:

[0045] 100. Processing molds;

[0046] 1. Upper die seat;

[0047] 11. Edge pressure rod;

[0048] 2. Punch plate;

[0049] 3. Punch fixing plate;

[0050] 4. Binder ring;

[0051] 41. V-shaped ring gear;

[0052] 5. Processing equipment;

[0053] 51. Pre-extrusion components;

[0054] 511, pre-extrusion punch;

[0055] 512, pre-extrusion back pressure block;

[0056] 513, pre-extrusion counter-pressure rod;

[0057] 52. Punching assembly;

[0058] 521, punching punch;

[0059] 522, punching counter-pressure rod;

[0060] 53. Extrusion components;

[0061] 531, extrusion punch;

[0062] 532, squeeze back pressure block;

[0063] 533, squeeze the counter-pressure rod;

[0064] 54. Blanking assembly;

[0065] 541, blanking punch;

[0066] 542, blanking counter-pressure block;

[0067] 543, blanking counter-pressure rod;

[0068] 6. Heating device;

[0069] 61. Upper sensor;

[0070] 62. Lower sensor;

[0071] 7. Materials to be processed;

[0072] 8. Concave die;

[0073] 81. Pre-extruded through hole;

[0074] 82. Punching through holes;

[0075] 83. Extrusion through hole;

[0076] 84. Blanking through hole;

[0077] 9. Die pad;

[0078] 10. Lower die base;

[0079] a. First direction;

[0080] b. Boss;

[0081] c. Countersunk hole;

[0082] e. Pilot hole;

[0083] D. Product outer diameter;

[0084] T, part thickness;

[0085] d. Countersink diameter;

[0086] t, countersink depth;

[0087] t1, hole height;

[0088] d1, inner diameter of turning hole;

[0089] d2, outer diameter of the hole. DETAILED DESCRIPTION

[0090] In order to explain in detail the possible application scenarios, technical principles, specific solutions that can be implemented, and the purpose and effects of this application, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application and are therefore only examples and are not intended to limit the scope of protection of this application.

[0091] References to "embodiments" herein mean that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the word "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the various technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution.

[0092] Unless otherwise defined, the technical terms used herein have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms herein is only for describing specific embodiments and is not intended to limit this application.

[0093] In the description of this application, the term "and / or" is used to describe a logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and both A and B exist. In addition, the character " / " in this document generally indicates that the objects before and after are in a logical "or" relationship.

[0094] In this application, terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, priority or sequence relationship between these entities or operations.

[0095] Without further limitations, in this application, the words "include", "comprise", "have" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those defined elements, but also other elements not explicitly listed, or elements inherent to such process, method or product.

[0096] Consistent with the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceed" are understood to exclude the number itself; expressions such as "above," "below," and "within" are understood to include the number itself. Furthermore, in the description of the embodiments of this application, "multiple" means two or more (including two), and similar expressions related to "multiple," such as "multiple groups" and "multiple times," are also understood in this manner, unless otherwise specifically defined.

[0097] In the description of the embodiments of the present application, the space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it should not be understood as a limitation on the embodiments of the present application.

[0098] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms "installed", "connected", "connected", "fixed", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art of the present application, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0099] As shown in Figure 1, D represents the outer diameter of the product, T represents the thickness of the part, d represents the diameter of the countersink, t represents the depth of the countersink, t1 represents the height of the hole, d1 represents the inner diameter of the hole, and d2 represents the outer diameter of the hole. If t1≤t and d2≤d are required, the existing technology can be used to process them, and the process is as follows: (1) punching d1, (2) extruding the countersink cd, and (3) blanking D. However, if the part with the hole requires t1≥t, or d2≥d, that is, the part with the hole requires the height of the protrusion to be higher or the width to be wider, the existing technology will not be able to meet the size requirements after forming due to insufficient material volume. The applicant discovered the above problem. In order to solve the above technical problem, the applicant adopted a five-station fine blanking hot extrusion continuous die, and through the five steps of heating, pre-extrusion, punching, extrusion and blanking, the part that meets the size requirements is processed. The entire processing process is completed on a processing die 100, which is easy to operate and can obtain the required size of the hole with the cooperation of the heating device 6 and the processing device 5.

[0100] The processing mold 100 of the present application for processing parts with turned holes is mainly used for processing parts with turned holes, especially when the height or width of the protrusion required for processing is higher.

[0101] According to some embodiments of the present application, please refer to Figures 2 to 10. This embodiment relates to a processing mold 100 with a flip-hole part, including an upper mold base 1, a lower mold base 10, a die 8, a pressure ring 4, a material to be processed 7, a heating device 6 and a processing device 5. The pressure ring 4 is located above the die 8, and an upper mold base 1 is provided above the pressure ring 4, and a lower mold base 10 is provided below the die 8; the material to be processed 7 is placed between the pressure ring 4 and the die 8, and a through hole is provided in the pressure ring 4 and the die 8 for the processing device 5 to extend and move. The processing device 5 is used to act on the material to be processed 7; the heating device 6 is used to heat the material to be processed 7. The processing device 5 includes a pre-extrusion component 51, a punching component 52, an extrusion component 53 and a blanking component 54 from left to right along the first direction a. The pre-extrusion component 51 is used to form a boss b on the material to be processed 7, the punching component 52 is used to punch the material to be processed 7 with the boss b formed, the extrusion component 53 is used to make the material to be processed 7 reach a preset size, and the blanking component 54 is used to punch and blank the material to be processed 7 that has reached the preset size.

[0102] The upper die base 1, the blank holder 4, the material to be processed 7, the die 8, and the lower die base 10 are arranged vertically from top to bottom. The material to be processed 7 is a medium-thick plate with a thickness ranging from 4mm to 12mm, and the material can be medium-low carbon steel, medium-low carbon alloy steel, stainless steel, or aluminum alloy, etc.

[0103] The technical solution of this application first locally heats the material to be processed 7 using a heating device 6; secondly, a portion of the material is transferred to the lower part through a pre-extrusion component 51 to form a prefabricated boss b; thirdly, a hole is punched using a punching component 52, at which point a hole wall equal in height to the prefabricated boss b is formed; thereafter, further extrusion is performed using an extrusion component 53 to further increase the height of the hole wall to meet the dimensional requirements after forming (i.e., satisfying t1 ≥ t, or d2 ≥ d). Finally, a blanking component 54 punches and blanks the formed part to obtain the target part. The entire processing process is completed on a processing mold 100, which is easy to operate and, with the cooperation of the heating device 6 and the processing device 5, can obtain a part with a flipped hole of the required size.

[0104] According to some embodiments of the present application, optionally, as shown in Figures 2, 4, 5 and 6, the heating device 6 is arranged on the left side of the pre-extrusion assembly 51, and the heating device 6 includes an upper sensor 61 and a lower sensor 62. The upper sensor 61 is installed in the pressure ring 4, and the lower sensor 62 is installed in the die 8. The upper sensor 61 and the lower sensor 62 cooperate to heat the material to be processed 7.

[0105] The upper and lower sensors 61 and 62 work together to locally heat the material 7, facilitating control. In-mold heating technology heats the material 7 within the extrusion deformation zone within the mold, enhancing its plasticity and reducing its resistance to deformation. Furthermore, it ensures that the temperature of the material 7 in the extrusion deformation zone does not drop due to prolonged material transfer.

[0106] According to some embodiments of the present application, optionally, as shown in Figures 2, 4, and 7 to 10, the pre-extrusion assembly 51 includes a pre-extrusion punch 511 and a pre-extrusion counter-pressure member, the output end of the pre-extrusion punch 511 is located in the blank holder 4, and the output end of the pre-extrusion counter-pressure member is located in the pre-extrusion through hole 81 of the die 8; the punching assembly 52 includes a punching punch 521 and a punching counter-pressure rod 522, the output end of the punching punch 521 is located in the blank holder 4, and the output end of the punching counter-pressure member is located in the pre-extrusion through hole 81 of the die 8. The output end of the rod 522 is located in the punching hole 82 of the die 8; the extrusion assembly 53 includes an extrusion punch 531 and an extrusion back-pressure piece, the output end of the extrusion punch 531 is located in the pressure ring 4, and the output end of the extrusion back-pressure piece is located in the extrusion through-hole 83 of the die 8; the blanking assembly 54 includes a blanking punch 541 and a blanking back-pressure piece, the output end of the blanking punch 541 is located in the pressure ring 4, and the output end of the blanking back-pressure piece is located in the blanking through-hole 84 of the die 8.

[0107] The pre-extrusion punch 511 moves downward under the action of the blanking force provided by the equipment, extruding the material to be processed 7 on the die 8, and the material to be processed 7 is transferred to the pre-extrusion through-hole 81 to form a boss b. The function of the pre-extrusion counter-pressure member is to press the bottom of the boss b under the cooperation of the equipment counter-pressure after the equipment slider returns, so that the material to be processed 7 is separated from the die 8. Among them, the pre-extrusion counter-pressure member includes a pre-extrusion counter-pressure block 512 and a pre-extrusion counter-pressure rod 513. The pre-extrusion counter-pressure block 512 is installed above the pre-extrusion counter-pressure rod 513. The pre-extrusion counter-pressure block 512 is used to separate the material to be processed 7 from the die 8 under the action of the pre-extrusion counter-pressure rod 513.

[0108] The punching punch 521 punches the pre-extruded material 7 under the action of the blanking force. After the equipment slide returns, the punching back pressure rod 522 pushes the punched waste out of the die 8 under the counter pressure provided by the equipment.

[0109] The punch 531 moves downward under the action of the blanking force, and the extrusion counter-pressure member also moves downward, completing the extrusion process. After the machine's slider returns, the extrusion counter-pressure member presses against the bottom of the boss b, releasing the material 7 from the die 8. The extrusion counter-pressure member comprises an extrusion counter-pressure block 532 and an extrusion counter-pressure rod 533. The extrusion counter-pressure block 532 is mounted above the extrusion counter-pressure rod 533. The extrusion counter-pressure block 532, under the action of the extrusion counter-pressure rod 533, releases the material 7 from the die 8.

[0110] The blanking punch 541 moves downward under the action of the blanking force, while the blanking counter-pressure member tightly presses the material to be processed 7. Under the action of the three-dimensional compressive stress, the blanking is completed. After the equipment slide returns, the blanking counter-pressure member ejects the finely blanked part from the die 8, obtaining the target part. The blanking counter-pressure member includes a blanking counter-pressure block 542 and a blanking counter-pressure rod 543. The blanking counter-pressure block 542 is installed above the blanking counter-pressure rod 543. Under the action of the blanking counter-pressure rod 543, the blanking counter-pressure block 542 ejects the finely blanked part from the die 8, thereby obtaining the target part.

[0111] According to some embodiments of the present application, optionally, as shown in Figure 2, the processing mold 100 with the hole-flipping part also includes a punch pad 2, a punch fixing plate 3 and a die pad 9; the punch pad 2 is arranged below the upper die base 1, and the fixed ends of the pre-extrusion punch 511, the punching punch 521, the extrusion punch 531 and the blanking punch 541 are fixed on the punch pad 2 by the punch fixing plate 3; the die pad 9 is arranged between the lower die base 10 and the die 8, and the lower ends of the pre-extrusion back pressure piece, the punching back pressure rod 522, the extrusion back pressure piece and the blanking back pressure piece pass through the die pad 9 and extend into the lower die base 10.

[0112] The punch fixing plate 3 is arranged below the punch backing plate 2 and is mainly used for reinforcing and fixing the punch. Therefore, a part of the punch is located in the punch fixing plate 3.

[0113] By setting a pad between the punch and the upper die base 1 and between the die 8 and the lower die base 10, the pad can directly bear and disperse the pressure transmitted by the punch or die 8, so as to reduce the unit pressure on the die base and protect the die base from being damaged by the end face of the punch or die 8.

[0114] According to some embodiments of the present application, optionally, as shown in Figures 3 and 7 to 10, a V-shaped gear ring 41 is provided at the corresponding positions of the bottom of the pressure ring 4 and the top of the die 8, and the V-shaped gear ring 41 is used to press into the material to be processed 7 to limit the flow of the material to be processed 7 in the horizontal direction.

[0115] In this way, by arranging V-shaped gear rings 41 on the surfaces of the blank holder 4 and the die 8, the material is further prevented from flowing horizontally during the extrusion process, thereby improving the hole wall height filling rate and the quality of the blanking shear surface.

[0116] According to some embodiments of the present application, optionally, arc-shaped raised points are provided at corresponding positions of the bottom of the pressure ring 4 and the top of the die 8, and the arc-shaped raised points are used to press into the material to be processed 7 to limit the flow of the material to be processed 7 in the horizontal direction.

[0117] Thus, the arc-shaped protrusion can prevent the material from flowing horizontally during the extrusion process. On the other hand, compared with the V-shaped gear ring 41, it is easier to manufacture and has a lower manufacturing cost, thereby reducing the processing cost of the mold 100. Optionally, the diameter of the arc-shaped protrusion is 0.6-1.8 mm.

[0118] According to some embodiments of the present application, optionally, as shown in Figure 5, two symmetrically distributed guide holes e are provided between the heating device 6 and the processing device 5 and between two adjacent components of the processing device 5. The guide holes e are used to cooperate with the guide pins to accurately position the material to be processed 7.

[0119] In this way, the existence of the guide hole e can accurately position the material to be processed 7 through the guide pins on the mold, thereby improving the processing accuracy.

[0120] According to some embodiments of the present application, optionally, the processing mold 100 with the hole-flipping part further includes an automatic feeder, which is used to transport the material to be processed 7 along the first direction a so that the processing device 5 processes the material to be processed 7 in sequence.

[0121] In this way, the four components of the processing device 5 can process the material 7 to be processed in sequence through the automatic feeder.

[0122] According to some embodiments of the present application, optionally, as shown in Figure 2, the processing mold 100 with the hole-turning part also includes a pressure rod 11, the upper end of the pressure rod 11 is located in the upper mold base 1, and the lower end of the pressure rod 11 is connected to the top of the pressure ring 4.

[0123] In this way, the blank holding force of the equipment can be transmitted to the blank holding ring 4 through the blank holding rod 11, so that the blank holding ring 4 is squeezed downward, thereby pressing the material to be processed 7. In particular, when a V-shaped gear ring 41 is provided on the surface of the blank holding ring 4 and the die 8, it is necessary to press the V-shaped gear ring 41 into the material to be processed 7 in advance to prevent the material from flowing in the horizontal direction, thereby improving the hole wall height filling rate and the quality of the shear surface of the blanking shape.

[0124] According to some embodiments of the present application, as shown in FIG5 , this embodiment further relates to a method for processing a part with a flanging hole, including a processing mold 100 for the part with a flanging hole, and further comprising the following steps:

[0125] S101: placing the material 7 to be processed between the blank holder 4 and the die 8, and the blank holder 4 and the die 8 press the material 7 to be processed;

[0126] S102: The heating device 6 locally heats the material 7 to be processed;

[0127] S103: The pre-extrusion component 51 extrude the locally heated material 7 to be processed, and the material 7 to be processed is deformed to form a boss b;

[0128] S104: The punching assembly 52 punches the material 7 after the boss b is formed;

[0129] S105: The extrusion assembly 53 extrudes the punched material 7 again, deforming the material 7 so that the height of the hole wall of the boss b is further increased, and the material 7 reaches a preset size;

[0130] S106: The blanking assembly 54 punches and blanks the material 7 to be processed that has reached a preset size to obtain a part with a punched hole.

[0131] As shown in Figure 5, during the processing process, the first step is to induction heat the material 7 in the pre-extrusion forming area to facilitate pre-extrusion forming. The second step is pre-extrusion, with the diameter of the pre-extrusion punch 511 being d1-0.1mm. The third step is punching, with the punch diameter equal to the inner diameter d1 of the extrusion hole. The fourth step is extrusion forming, further increasing the hole wall height of the boss b to ultimately meet the required dimensions. The fifth step is fine blanking of the workpiece shape. Prior to forming in the second, fourth, and fifth steps, a V-shaped gear ring 41, mounted on the blank holder 4 and the die 8, pre-presses the material 7 to prevent horizontal material flow, thereby improving the hole wall height filling rate and the quality of the shear surface of the blanking shape.

[0132] The technical solution of this application utilizes a five-station fine-blanking hot extrusion continuous die. Through five process steps: heating, pre-extrusion, punching, extrusion, and blanking, parts meeting dimensional requirements are produced. Specifically, the heating device 6 locally heats the material 7 to be processed. Second, the pre-extrusion assembly 51 transfers some of the material to the lower portion, forming a prefabricated boss b. Third, the punching assembly 52 punches the material, creating a hole wall equal in height to the prefabricated boss b. Further extrusion is then performed by the extrusion assembly 53, further increasing the height of the hole wall to meet the post-forming dimensional requirements (i.e., satisfying t1 ≥ t or d2 ≥ d). Finally, the blanking assembly 54 punches and blanks the formed part to produce the desired part. The entire process is completed within a single processing die 100, making operation convenient. The cooperation between the heating device 6 and the processing device 5 allows for the production of parts with flipped holes of the desired dimensions.

[0133] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection of the present invention. Therefore, based on the innovative concept of the present invention, changes and modifications to the embodiments described herein, or equivalent structural or equivalent process transformations made using the contents of the present invention's specification and drawings, and direct or indirect application of the above technical solutions to other related technical fields, are all included in the scope of patent protection of the present invention.

Claims

1. A processing mold with a hole-turning part, characterized in that: It includes an upper die base, a lower die base, a concave die, a blank holder, a material to be processed, a heating device and a processing device, wherein the blank holder is located above the concave die, the upper die base is arranged above the blank holder, and the lower die base is arranged below the concave die; The material to be processed is placed between the blank holder and the die, and through holes are provided in the blank holder and the die for the processing device to extend and move therein, and the processing device is used to act on the material to be processed; The heating device is used to heat the material to be processed. The processing device includes a pre-extrusion component, a punching component, an extrusion component and a blanking component from left to right along the first direction. The pre-extrusion component is used to form a boss on the material to be processed. The punching component is used to punch the material to be processed with the boss formed. The extrusion component is used to make the material to be processed reach a preset size. The blanking component is used to stamp and blank the material to be processed that has reached the preset size.

2. The processing die for parts with flanging holes according to claim 1, characterized in that: The heating device is arranged on the left side of the pre-extrusion component, and the heating device includes an upper sensor and a lower sensor. The upper sensor is installed in the pressure ring, and the lower sensor is installed in the die. The upper sensor and the lower sensor cooperate to heat the material to be processed.

3. The processing die for parts with flanging holes according to claim 1, characterized in that: The pre-extrusion assembly comprises a pre-extrusion punch and a pre-extrusion counter-pressure piece, wherein the output end of the pre-extrusion punch is located in the blank holder ring, and the output end of the pre-extrusion counter-pressure piece is located in the pre-extrusion through hole of the die; The punching assembly comprises a punching punch and a punching back pressure rod, wherein the output end of the punching punch is located in the blank holder ring, and the output end of the punching back pressure rod is located in the punching through hole of the die; The extrusion assembly comprises an extrusion punch and an extrusion counter-pressure piece, wherein the output end of the extrusion punch is located in the blank holder ring, and the output end of the extrusion counter-pressure piece is located in the extrusion through hole of the die; The blanking assembly comprises a blanking punch and a blanking counter-pressure piece. The output end of the blanking punch is located in the blank holding ring, and the output end of the blanking counter-pressure piece is located in the blanking through hole of the die.

4. The processing die for parts with flanging holes according to claim 3, characterized in that: The processing die for the part with a flanging hole also includes a punch pad, a punch fixing plate and a die pad; The punch pad is arranged below the upper die seat, and the fixed ends of the pre-extrusion punch, the punching punch, the extrusion punch and the blanking punch are fixed on the punch pad by means of the punch fixing plate; The die pad is arranged between the lower die seat and the die, and the lower ends of the pre-extrusion back-pressure piece, the punching back-pressure rod, the extrusion back-pressure piece and the blanking back-pressure piece penetrate the die pad and extend into the lower die seat.

5. The processing die for parts with flanging holes according to claim 1, characterized in that: A V-shaped gear ring is arranged at the corresponding position of the bottom of the blank holder and the top of the die, and the V-shaped gear ring is used to press the material to be processed to limit the flow of the material to be processed in the horizontal direction.

6. The processing die for parts with flanging holes according to claim 1, characterized in that: Arc-shaped protrusions are arranged at corresponding positions of the bottom of the blank holder and the top of the die, and the arc-shaped protrusions are used to press into the material to be processed to limit the flow of the material to be processed in the horizontal direction.

7. The processing die for parts with flanging holes according to claim 1, characterized in that: Two symmetrically distributed guide holes are provided between the heating device and the processing device and between two adjacent components of the processing device. The guide holes are used to cooperate with guide pins to accurately position the material to be processed.

8. The processing die for parts with flanging holes according to claim 1, characterized in that: The processing mold with the hole-flanging part also includes an automatic feeder, which is used to transport the material to be processed along a first direction so that the processing device can process the material to be processed in sequence.

9. The processing die for parts with flanging holes according to claim 1, characterized in that: The processing die for the part with a flanging hole also includes a pressure rod, the upper end of which is located in the upper die seat, and the lower end of which is connected to the top of the pressure ring.

10. A method for processing parts with flanging holes, characterized in that: The processing mold for the part with a flanging hole as claimed in any one of claims 1 to 9 further comprises the following steps: Placing the material to be processed between the blank holder and the die, wherein the blank holder and the die press the material to be processed; The heating device locally heats the material to be processed; The pre-extrusion component extrude the locally heated material to be processed, and the material to be processed is deformed to form a boss; The punching assembly punches holes in the material to be processed after the boss is formed; The extrusion assembly extrudes the punched material again, so that the material is deformed, and the height of the hole wall of the boss is further increased, and the material reaches a preset size. The blanking assembly punches and blanks the material to be processed that has reached a preset size to obtain a part with a punched hole.

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