Forging die and forging method without typical parting surface

Abstract

The present application relates to the field of forging, and provides a forging forming die without a typical parting surface and a forging forming method. The forging forming die without a typical parting surface comprises a lower die core, at least two side dies adapted to switch relative to the lower die core between a fitting position and a separation position, in the fitting position, the at least two side dies are adapted to fit on the side dies to form a die cavity, in the separation position, the at least two side dies are adapted to be away from the lower die core, a die sleeve adapted to switch relative to the side dies between a pressing position and a separation position, in the pressing position, the die sleeve is adapted to be pressed on the outer circumferential surface of the side dies, in the separation position, the die sleeve is adapted to be separated from the side dies, and an upper die core adapted to act relative to the lower die core to forge a blank in the die cavity. The forging forming die can improve near-net-shape forming of multiple types of complex parts without a typical parting surface, can improve material utilization and forming precision of forgings, and can ensure smooth demolding.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of forging, and provides a forging forming die without a typical parting surface and a forging forming method. BACKGROUND

[0002] For complex parts without a typical parting surface, forming by ordinary die forging will have problems such as difficult demolding or reduced material utilization, including but not limited to the following types of parts:

[0003] Parts with thick ends and thin middle and cavities at the ends, such as automobile hubs or Laval nozzles. For example, a Laval nozzle is composed of two conical pipes, with thick ends and thin middle. If this part is forged by ordinary die forging method, there is no obvious parting surface, and it is difficult to demold;

[0004] Parts with short bosses, lugs or short shafts on the side surface and cavities at the ends, which are difficult to forge by ordinary die forging method;

[0005] Parts with cavities on the side surface, such as common three-way pipes, four-way pipes, etc.;

[0006] Deep rib and thin rib type forgings are difficult to demold in ordinary forging process.

[0007] Therefore, the above complex parts are not suitable for forming by ordinary die forging method, and can be forged by multi-directional die forging equipment, however, the number of multi-directional die forging equipment is small and the cost is high. In addition, the upper and lower mold core concentric guide mechanisms currently commonly use guide pillars and guide sleeves or upper and lower whole mold mechanisms that first position and then lock the mold core. The former has a large design gap, and the latter will cause the locked mold core to loosen after multiple forging cycles, which will cause wear of the guide surface. The precision of the concentric guide of both is low, which is not conducive to the near-net forming of forgings with high precision. SUMMARY

[0008] The present application aims to at least solve one of the technical problems in the related art. To this end, the present application provides a forging forming die without a typical parting surface, which can improve the near-net forming of multiple types of complex parts without a typical parting surface.

[0009] The present application also provides a forging forming method.

[0010] The first aspect of the present application provides a forging forming die without a typical parting surface, comprising:

[0011] A lower mold core;

[0012] At least two side molds adapted to switch between a fitting position and a separation position relative to the lower mold core. In the fitting position, the at least two side molds are adapted to fit the side molds to form a mold cavity. In the separation position, the at least two side molds are adapted to be away from the lower mold core.

[0013] a die sleeve adapted to switch relative to the side dies between a pressing position and a disengaging position, in the pressing position, the die sleeve is adapted to be pressed against the outer circumferential surface of the side dies, in the disengaging position, the die sleeve is adapted to be disengaged from the side dies;

[0014] an upper die core adapted to move relative to the lower die core to forge the blank in the die cavity.

[0015] The forging forming die without typical parting surface according to the first aspect of the present application, by setting at least two side dies and setting the at least two side dies in a form switchable between the fitting position and the disengaging position, so that the side dies can be fitted with the lower die core to form a die cavity, and the die cavity can clamp the blank. By setting the die sleeve switchable between the pressing position and the disengaging position, so that the die sleeve can be pressed against the outer circumferential surface of the side dies and exert a certain pre-tightening force on the side dies, which improves the clamping force of the side dies on the blank. When the upper die core approaches the lower die core, the forging of the blank can be completed. Thus, the near-net forming of various complex parts without typical parting surface can be improved, such as the four-way part with a cavity on the side, the missile nozzle, the lug cylindrical forging, etc. The forging forming die without typical parting surface can improve the material utilization rate and the forming precision of the forgings, and ensure smooth demolding.

[0016] According to one embodiment of the present application, in a plane perpendicular to the axis of the side dies, opposite sides of each side die are provided with a rhombic slot and a semicircular slot that are in communication with each other;

[0017] Further comprising a core shaft die, the core shaft die comprising a rhombic die and a circular die;

[0018] From the disengaging position to the fitting position, the rhombic die is adapted to be inserted into the rhombic slot, and the circular die is adapted to be inserted into the semicircular slot on the adjacent two side dies; from the fitting position to the disengaging position, the rhombic die is adapted to be withdrawn from the rhombic slot, and the circular die is adapted to be withdrawn from the semicircular slot on the adjacent two side dies.

[0019] According to one embodiment of the present application, the outer surface of the lower die core is formed with a first positioning surface, and the inner surface of at least two side dies is formed with a second positioning surface corresponding to the first positioning surface;

[0020] The inner surface of the die sleeve is formed with a first pressing surface, and the outer surface of at least two side dies is formed with a second pressing surface;

[0021] In the fitting position, the lower die core and the at least two side dies are adapted to be positioned and fitted by the first positioning surface and the second positioning surface;

[0022] In the pressing position, the die sleeve is adapted to be positioned and pressed by the first pressing surface and the second pressing surface with the at least two side dies.

[0023] The first pressing surface and the second pressing surface are both inclined surfaces.

[0024] According to an embodiment of the present application, an outer surface of the upper die core is provided with a third positioning surface, and an inner surface of the at least two side dies is formed with a fourth positioning surface corresponding to the third positioning surface.

[0025] In the process of approaching the upper die core to the lower die core, the upper die core is adapted to be positioned and matched by the third positioning surface and the fourth positioning surface with the at least two side dies.

[0026] According to an embodiment of the present application, a base plate is further included, and the lower die core is formed in the base plate.

[0027] According to an embodiment of the present application, a first driving device and a second driving device are arranged on the base plate, the first driving device is drivingly connected with the at least two side dies, and the second driving device is drivingly connected with the die sleeve.

[0028] According to an embodiment of the present application, the first driving device is adapted to drive the at least two side dies to move in a plane perpendicular to the axis of the upper die core.

[0029] The second driving device is adapted to drive the die sleeve to move in a plane parallel to the axis of the upper die core.

[0030] According to an embodiment of the present application, an ejection mechanism is further arranged on the base plate, the lower die core is provided with a through hole, and the ejection mechanism is adapted to pass through the through hole to eject the blank after the forging and pressing are completed.

[0031] The second aspect of the present application provides a forging forming method based on the above-mentioned forging forming die without a typical parting surface, which comprises:

[0032] Switching the at least two side dies from the separated position to the abutting position;

[0033] Placing a blank in the die cavity;

[0034] Switching the die sleeve from the separated position to the pressing position;

[0035] Driving the upper die core to forge the blank.

[0036] According to the forging forming method provided by the second aspect of the present application, the near net forming of various complex parts without typical parting surface can be improved, and the demolding can be realized smoothly.

[0037] According to one embodiment of the present application, after the step of driving the upper die core to forge the blank, the method comprises:

[0038] Switching the die sleeve from the pressing position to the disengaging position;

[0039] Switching the at least two side dies from the abutting position to the separating position;

[0040] Taking out the forged blank.

[0041] The one or more technical solutions in the embodiments of the present application have at least one of the following technical effects:

[0042] According to the forging forming die without typical parting surface provided by the first aspect of the present application, at least two side dies are arranged, and the at least two side dies are arranged in a form capable of being switched between an abutting position and a separating position, so that the side dies can abut the lower die core to form a die cavity, and the die cavity can clamp the blank. The die sleeve is arranged in a form capable of being switched between a pressing position and a disengaging position, so that the die sleeve can be pressed against the outer circumferential surface of the side dies and exert a certain pre-tightening force on the side dies, thereby improving the clamping force of the side dies on the blank. When the upper die core approaches the lower die core, the forging of the blank can be completed. Thus, the near net forming of various complex parts without typical parting surface, such as a four-way part with a cavity on the side surface, a missile nozzle, a cylindrical forging with lugs, etc., can be improved, and the material utilization rate and the forming precision of the forging can be improved, and the demolding can be realized smoothly.

[0043] Further, according to the forging forming method provided by the second aspect of the present application, the near net forming of various complex parts without typical parting surface can be improved, and the demolding can be realized smoothly. The forging forming method has the advantages of high forming efficiency and low forming difficulty.

[0044] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0045] In order to make the technical solutions in the present application or prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description are only some embodiments of the present application, and other accompanying drawings can be obtained by those of ordinary skill in the art without any creative effort based on these accompanying drawings.

[0046] Figure 1 is a schematic sectional view of an upper die core in a forging forming die without a typical parting surface provided by an embodiment of the present application;

[0047] Figure 2 is a schematic top view of an edge die in a fitting position in a forging forming die without a typical parting surface provided by an embodiment of the present application;

[0048] Figure 3 is a schematic side view of a forging forming die without a typical parting surface provided by an embodiment of the present application;

[0049] Figure 4 is a schematic sectional view of an upper die core in a forging forming die without a typical parting surface provided by an embodiment of the present application;

[0050] Figure 5 is a schematic top view of an edge die in a separating position in a forging forming die without a typical parting surface provided by an embodiment of the present application;

[0051] Figure 6 is a schematic sectional view of a die sleeve in a separating position in a forging forming die without a typical parting surface provided by an embodiment of the present application;

[0052] Figure 7 is a schematic sectional view of an edge die in a separating position in a forging forming die without a typical parting surface provided by an embodiment of the present application;

[0053] Figure 8 is a schematic top view of another forging forming die without a typical parting surface provided by an embodiment of the present application;

[0054] Figure 9 is a schematic sectional view of another forging forming die without a typical parting surface provided by an embodiment of the present application;

[0055] Figure 10 is a schematic flow chart of a forging forming method provided by an embodiment of the present application.

[0056] Reference signs:

[0057] 100, lower core; 102, side mold; 104, mold sleeve; 106, upper core; 108, oblique square groove; 110, semicircular groove; 112, mandrel mold; 114, circular mold; 116, backing plate; 118, first driving device; 120, second driving device; 122, ejection mechanism. DETAILED DESCRIPTION

[0058] The embodiments of the present application will be further described in details with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0059] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the embodiments of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0060] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0061] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0062] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0063] As shown in Figures 1 to 9 the first aspect of the present application provides a forging forming die without a typical parting surface, comprising:

[0064] a lower die core 100;

[0065] at least two side dies 102 adapted to switch between a fitting position and a separation position relative to the lower die core 100, in the fitting position, the at least two side dies 102 are adapted to fit on the side die 102 to form a die cavity, in the separation position, the at least two side dies 102 are adapted to be away from the lower die core 100;

[0066] a die sleeve 104 adapted to switch between a pressing position and a disengaging position relative to the side die 102, in the pressing position, the die sleeve 104 is adapted to be pressed on the outer peripheral surface of the side die 102, in the disengaging position, the die sleeve 104 is adapted to be disengaged from the side die 102;

[0067] an upper die core 106 adapted to act relative to the lower die core 100 to forge a blank in the die cavity.

[0068] The forging forming die without a typical parting surface provided by the first aspect of the present application, by setting at least two side dies 102, and setting the at least two side dies 102 to be switchable between a fitting position and a separation position, so that the side die 102 can be fitted with the lower die core 100 to form a die cavity, and the die cavity can clamp the blank. By setting the die sleeve 104 to be switchable between a pressing position and a disengaging position, so that the die sleeve 104 can be pressed on the outer peripheral surface of the side die 102 and exert a certain pre-tightening force on the side die 102, which improves the clamping force of the side die 102 on the blank. When the upper die core 106 approaches the lower die core 100, the forging of the blank can be completed. Thus, the near-net forming of various complex parts without a typical parting surface can be improved, such as the four-way part with a cavity on the side, the missile nozzle, the ear-shaped cylindrical forging, etc. The forging forming die without a typical parting surface can improve the material utilization rate and the forming precision of the forging, and ensure smooth demolding.

[0069] Please continue to see Figures 1 to 9 In the embodiment of the present application, the forging forming die mainly comprises a base plate 116, a lower die core 100 integrally formed on the base plate 116, at least two side dies 102 arranged on both sides of the lower die core 100, a die sleeve 104 and an upper die core 106 arranged above the lower die core 100.

[0070] Specifically, taking two side dies 102 as an example, the two side dies 102 are approximately semicircular structures, and the at least two side dies 102 can be switched between a separated position and an abutting position. In the embodiment of the present application, in order to be able to drive the side dies 102, a first driving device 118 is further arranged on the base plate 116, and the first driving device 118 mentioned herein can be a hydraulic component. The first driving device 118 is arranged on each side die 102, and the first driving device 118 can drive the side die 102 to move in a plane perpendicular to the axis of the upper die core 106. That is, the first driving device 118 can drive the side die 102 to switch between the abutting position abutting the lower die core 100 and the separated position away from the lower die core 100.

[0071] According to an embodiment of the present application, an outer surface of the lower die core 100 is formed with a first positioning surface, and an inner surface of the at least two side dies 102 is formed with a second positioning surface at a position corresponding to the first positioning surface; in the abutting position, the lower die core 100 and the at least two side dies 102 are adapted to be positioned and matched through the first positioning surface and the second positioning surface.

[0072] It can be understood that the outer surface of the lower die core 100 is formed with the first positioning surface, and the first positioning surface can be a cylindrical surface, and correspondingly, the inner surface of each side die 102 is formed with the second positioning surface at a position corresponding to the first positioning surface, and the second positioning surface can also be a cylindrical surface. When the side die 102 is switched from the separated position to the abutting position, the second positioning surface on the side die 102 can abut the first positioning surface on the lower die core 100, thereby completing the axial positioning of the side die 102 and the lower die core 100.

[0073] It should be noted that when the side die 102 abuts the lower die core 100, the side die 102 can be surrounded with the lower die core 100 to form a die cavity for placing a blank.

[0074] According to an embodiment of the present application, in a plane perpendicular to the axis of the side die 102, opposite sides of each side die 102 are provided with a diagonal square groove 108 and a semicircular groove 110 which are in communication with each other;

[0075] The forging forming die further comprises a core shaft die 112, and the core shaft die 112 comprises a diagonal square die and a circular die 114;

[0076] From the separation position to the bonding position, the rhomboid mold is adapted to be inserted into the rhomboid groove 108, and the circular mold 114 is adapted to be inserted into the semi-circular grooves 110 on the two adjacent side molds 102; from the bonding position to the separation position, the rhomboid mold is adapted to be withdrawn from the rhomboid groove 108, and the circular mold 114 is adapted to be withdrawn from the semi-circular grooves 110 on the two adjacent side molds 102.

[0077] like Figure 7 As shown, when forging parts with cavities on the sides, such as tees and crosses, oblique grooves 108 and semicircular grooves 110 are provided on the sides of two adjacent side dies 102. Correspondingly, the forging die also includes a mandrel die 112 and a circular die 114. When the side dies 102 switch from a separated position to a fitted position, the semicircular grooves 110 on the two adjacent side dies 102 can align to form a complete circular groove. Simultaneously, the mandrel die 112 is inserted into the oblique groove 108, and the circular die 114 is inserted into the circular groove. During this process, the mandrel die 112 and the circular die 114, along with the side dies 102 and the lower die core 100, participate in the mold closing process. When the side dies 102 switch from a fitted position to a separated position, the semicircular grooves 110 on the two adjacent side dies 102 move away from each other. Simultaneously, the mandrel die 112 exits from the oblique groove 108, and the circular die 114 exits from the circular groove.

[0078] It should be noted that, in this embodiment of the invention, the oblique groove 108 is formed in a plane on the side mold 102 perpendicular to the axis of the side mold 102. Of course, it can be understood that when the side of the part has cavities in other directions, the forming direction of the oblique groove 108 can be consistent with the forming direction of the cavity.

[0079] In this embodiment of the invention, the mold sleeve 104 is used to press the side mold 102 and provide a certain preload to the side mold 102. Therefore, the mold sleeve 104 is adapted to switch between a pressing position and a disengaged position relative to the side mold 102. When the mold sleeve 104 is in the pressing position, it can press against the outer surface of the side mold 102, and at this time, the mold sleeve 104 can apply a certain preload to the side mold 102. When the mold sleeve 104 is in the disengaged position, the mold sleeve 104 and the side mold 102 are separated.

[0080] In order to achieve the clamping of the mold sleeve 104 and the side mold 102, a first clamping surface is formed on the inner surface of the mold sleeve 104 and a second clamping surface is formed on the outer surface of the side mold 102; in the clamping position, the mold sleeve 104 and at least two side molds 102 are adapted to be positioned and clamped by the first clamping surface and the second clamping surface; wherein, the first clamping surface and the second clamping surface are both inclined surfaces.

[0081] The first pressing surface formed by the inner surface of the die sleeve 104 is a slope, and correspondingly, the second pressing surface formed by the outer surface of the side die 102 is also a slope, and the inclination angle of the first pressing surface is consistent with the inclination angle of the second pressing surface. It should be noted that in the embodiment of the present application, the inclination direction of the first pressing surface is: the direction from the upper die core 106 to the lower direction along the axial direction of the upper die core 106, and the first pressing surface gradually deviates from the axial direction of the upper die core 106. Similarly, the inclination direction of the second pressing surface is the same as that of the first pressing surface. Therefore, when the die sleeve 104 gradually approaches the side die 102 from top to bottom, the first pressing surface can gradually press the second pressing surface, so that the side die 102 can be pre-tightened by the die sleeve 104.

[0082] Since the side die 102 has been positioned with the lower die core 100, the positioning and cooperation of the die sleeve 104 and the side die 102 can also be achieved through the pressing cooperation of the first pressing surface and the second pressing surface.

[0083] According to an embodiment of the present application, the second driving device 120 is arranged on the base plate 116 and is in transmission connection with the die sleeve 104.

[0084] As described above, in order to drive the die sleeve 104, the second driving device 120 is arranged on the base plate 116, and the second driving device 120 can use a hydraulic cylinder or the like, and the second driving device 120 is used to drive the die sleeve 104 to switch between the pressing position and the disengagement position.

[0085] According to an embodiment of the present application, the second driving device 120 is adapted to drive the die sleeve 104 to move in a plane parallel to the axis of the upper die core 106.

[0086] Referring to Figure 1 , Figure 4 and Figure 6 , in the embodiment of the present application, the action direction of the second driving device 120 is along the axial direction of the upper die core 106, so that the second driving device 120 can drive the die sleeve 104 to move along the height direction as shown in Figure 1 .

[0087] According to an embodiment of the present application, the outer surface of the upper die core 106 is provided with a third positioning surface, and the inner surface of at least two side dies 102 is formed with a fourth positioning surface at a position corresponding to the third positioning surface.

[0088] In the process that the upper die core 106 approaches the lower die core 100, the upper die core 106 and the at least two side dies 102 are adapted to be positioned and cooperated through the third positioning surface and the fourth positioning surface.

[0089] In the embodiment of the present application, in order to realize the positioning between the upper die core 106 and the side die 102, a third positioning surface is arranged on the outer surface of the upper die core 106, and the third positioning surface can be a cylindrical surface. Correspondingly, the fourth positioning surface is also a cylindrical surface. In this way, when the upper die core 106 moves downward, the upper die core 106 can realize the positioning with the inner surface of the side die 102 through the positioning cooperation of the third positioning surface and the fourth positioning surface.

[0090] In combination with the above description, since the side die 102 has been positioned with the lower die core 100, and the die sleeve 104 has also been positioned with the side die 102, in combination with the positioning of the upper die core 106 and the side die 102, the synchronous and coaxial positioning of the upper die core 106, the die sleeve 104, the side die 102 and the lower die core 100 can be realized at the same time with the lower die core 100 as the reference.

[0091] According to one embodiment of the present application, the ejection mechanism 122 is further arranged on the base plate 116, and the lower die core 100 is provided with a through hole, and the ejection mechanism 122 is adapted to pass through the through hole to eject the blank after the forging is completed.

[0092] As shown in Figure 1 in order to be able to take out the blank after the forging is completed, the ejection mechanism 122 is further arranged on the base plate 116, and for this purpose, the lower die core 100 is provided with a through hole, and the ejection mechanism 122 can pass through the through hole to eject the blank after the forging is completed.

[0093] As shown in Figure 10 the second aspect embodiment of the present application provides a forging forming method based on the above-mentioned forging forming die without a typical parting surface, which comprises the following steps:

[0094] Step 10, switching at least two side dies 102 from a separated position to a close position;

[0095] Step 20, placing the blank in the die cavity;

[0096] Step 30, switching the die sleeve 104 from a separated position to a pressing position;

[0097] Step 40, driving the upper die core 106 to forge the blank.

[0098] According to the forging forming method provided by the second aspect embodiment of the present application, the forging forming method is realized based on the above-mentioned forging forming die without a typical parting surface, which can improve the near-net forming of multiple types of complex parts without a typical parting surface, and can also realize smooth demolding. The forging forming method has the advantages of high forming efficiency and low forming difficulty.

[0099] Specifically, in step 10, first, the side mold 102 is switched from the separated position to the adhering position adhering to the lower mold core 100 by the first driving device 118, at this time, the side mold 102 and the lower mold core 100 surround to form a mold cavity for placing the blank;

[0100] In step 20, the blank can be preheated, and then the heated blank is placed in the mold cavity;

[0101] In step 30, the mold cover 104 is switched from the separated position to the pressing position by the second driving device 120, so that the mold cover 104 adheres to the side mold 102 and applies a certain pre-tightening force to the side mold 102;

[0102] In step 40, the upper mold core 106 is driven to move to the position close to the lower mold core 100 to make the upper mold core 106 perform forging forming on the blank;

[0103] According to one embodiment of the present application, after step 40, it comprises:

[0104] Step 50, switching the mold cover 104 from the pressing position to the separated position;

[0105] Step 60, switching the at least two side molds 102 from the adhering position to the separated position;

[0106] Step 70, taking out the forged blank.

[0107] Specifically, in step 50, after forging, the mold cover 104 is switched from the pressing position to the separated position by the second driving device 120, at this time, the pre-tightening force applied to the side mold 102 disappears;

[0108] In step 60, the side mold 102 is switched from the adhering position to the separated position by the first driving device 118, at this time, the mold cavity surrounded by the side mold 102 and the lower mold core 100 is open;

[0109] In step 70, the forged blank can be ejected by the ejector mechanism 122.

[0110] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A forging forming die without a typical parting surface, characterized by, The utility model relates to a die set, comprising: a lower die core (100); at least two side dies (102) adapted to switch between a closed position and an open position relative to the lower die core (100), in the closed position, the at least two side dies (102) are adapted to close to the side dies (102) to form a die cavity, in the open position, the at least two side dies (102) are adapted to be away from the lower die core (100); a die sleeve (104) adapted to switch between a pressing position and a disengaging position relative to the side dies (102), in the pressing position, the die sleeve (104) is adapted to press against the outer circumferential surface of the side dies (102), in the disengaging position, the die sleeve (104) is adapted to disengage from the side dies (102); an upper die core (106) adapted to act relative to the lower die core (100) to forge a blank in the die cavity; in a plane perpendicular to the axis of the side dies (102), a rhombic groove (108) and a semicircular groove (110) are arranged on opposite sides of each of the side dies (102) and communicate with each other; further comprising a core pin die (112), the core pin die (112) comprises a rhombic die and a circular die (114); from the open position to the closed position, the rhombic die is adapted to be inserted into the rhombic groove (108), and the circular die (114) is adapted to be inserted into the semicircular groove (110) on the adjacent two side dies (102); from the closed position to the open position, the rhombic die is adapted to be withdrawn from the rhombic groove (108), and the circular die (114) is adapted to be withdrawn from the semicircular groove (110) on the adjacent two side dies (102).

2. The forging die without a typical parting surface according to claim 1, characterized by, the outer surface of the lower die core (100) is formed with a first positioning surface, and the inner surface of the at least two side dies (102) is formed with a second positioning surface at a position corresponding to the first positioning surface; the inner surface of the die sleeve (104) is formed with a first pressing surface, and the outer surface of the at least two side dies (102) is formed with a second pressing surface; in the closed position, the lower die core (100) and the at least two side dies (102) are adapted to be positioned and matched by the first positioning surface and the second positioning surface; in the pressing position, the die sleeve (104) and the at least two side dies (102) are adapted to be positioned and matched by the first pressing surface and the second pressing surface and achieve pressing; wherein the first pressing surface and the second pressing surface are both inclined surfaces.

3. The forging die without a typical parting surface according to claim 2, characterized by, the outer surface of the upper die core (106) is provided with a third positioning surface, and the inner surface of the at least two side dies (102) is formed with a fourth positioning surface at a position corresponding to the third positioning surface; in the process that the upper die core (106) approaches the lower die core (100), the upper die core (106) and the at least two side dies (102) are adapted to be positioned and matched by the third positioning surface and the fourth positioning surface.

4. The non-traditionally split die forging forming die according to any one of claims 1 to 3, characterized by, further comprising a backing plate (116), and the lower die core (100) is formed in the backing plate (116).

5. The non-traditionally split die forging forming die of claim 4, wherein, First driving means (118) and second driving means (120) are arranged on the base plate (116), the first driving means (118) are in driving connection with the at least two side dies (102), and the second driving means (120) are in driving connection with the die sleeve (104).

6. The forging die without a typical parting surface of claim 5, wherein, The first driving means (118) are adapted to drive the at least two side dies (102) to move in a plane perpendicular to the axis of the upper die core (106); The second driving means (120) are adapted to drive the die sleeve (104) to move in a plane parallel to the axis of the upper die core (106).

7. The non-traditionally split die forging forming die of claim 4, wherein, An ejection mechanism (122) is further arranged on the base plate (116), the lower die core (100) is provided with a through hole, and the ejection mechanism (122) is adapted to pass through the through hole to eject the blank after forging.

8. A forging forming method based on the forging forming die without a typical parting surface according to any one of claims 1 to 7, characterized by, Comprising: Switching the at least two side dies (102) from the separated position to the abutting position; Placing the blank in the die cavity; Switching the die sleeve (104) from the separated position to the pressing position; Driving the upper die core (106) to forge the blank.

9. The forging method of the forging die of the representative die surface according to claim 8, characterized by, After the step of driving the upper die core (106) to forge the blank, comprising: Switching the die sleeve (104) from the pressing position to the separated position; Switching the at least two side dies (102) from the abutting position to the separated position; Taking out the forged blank.

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