Cylinder barrel type forge piece die forging die with large-diameter flange

Abstract

The utility model relates to a cylinder barrel type forge piece die forging die with a large-diameter flange. The cylinder barrel type forge piece die forging die comprises a cake upsetting die and a closed die forging die. The cake upsetting die is composed of a lower flat plate, a ring sleeve and an upper flat plate. The ring sleeve is fixedly mounted on the top surface of the lower flat plate; the upper flat plate is arranged above the ring sleeve in a manner of moving up and down; the closed die forging die comprises a lower base plate, a lower die is arranged at the top of the lower base plate, and a cavity used for forming a cylinder barrel forge piece is formed in the center of the top of the lower die. The cavity consists of a cylindrical cavity and a flange cavity; an upper punch is arranged in the cylindrical cavity, and the upper end of the punch is sleeved with a flange forging and pressing device matched with the punch in an up-down sliding mode. According to the cylinder barrel type forge piece die forging die with the large-diameter flange, a cake blank is pressed into a forge piece barrel wall through reverse extrusion, the top of a barrel-shaped piece blank is pressed into a flange shape through the annular flat punch, the defects such as folding cannot be generated in the upsetting forming process, the product quality and the machining efficiency are guaranteed, the later machining allowance is small, and the machining cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the cylinder forge piece die forging processing with flange, especially a cylinder type forge piece die forging die with large diameter flange. BACKGROUND

[0002] Large carrying devices such as heavy mine cars have huge car bodies, and the engine structure used is also relatively large in size, and accordingly, the cylinder in the engine is also relatively large in size, the forge piece is characterized by large flange diameter and small cylinder wall thickness, after being pressed and formed by an integral closed forging die, the flange position has folding defects, in order to facilitate assembly, some cylinders of engines are provided with flanges, the diameter of the flange is larger than that of the cylinder, and the flange and the cylinder form a T-shaped structure, such large cylinders with flanges are mostly processed by die forging or free forging processes.

[0003] However, the traditional die forging or free forging process can only form forge pieces with large wall thickness and small flange diameter for the cylinder with large diameter flange, the size difference between such forge pieces and the final product is very large, and the excess material needs to be removed by a machine tool through multiple rough machining and finishing machining, the processing efficiency is not high, the large excess amount of the forge piece causes the high processing cost, and in addition, due to the height-diameter ratio of about 4.1 of the cylinder wall part from the mouth of the forge piece to the flange of the lower die, the too large height-diameter ratio directly causes the instability of the flange and the cylinder wall during upsetting forming, and further causes folding defects, affecting the processing quality of the product.

[0004] In order to solve such defects, the existing cylinder with large diameter flange adopts a processing process of welding the flange and the cylinder together, although the folding defects can be solved, the product is a combined shape, the structural strength is not high, and the quality of the product is reduced. SUMMARY

[0005] The technical problem to be solved by the utility model is to provide a cylinder type forge piece die forging die with large diameter flange, which can effectively prevent folding defects at the flange position.

[0006] In order to solve the above technical problem, the utility model is realized by the following technical scheme:

[0007] The application discloses a cylinder type forging die with a large-diameter flange, which comprises a upsetting die for forging a blank into a cake blank and a closed die forging die for forging the cake blank into a cylinder forging.

[0008] Further, the cylinder type cavity is provided with a ejection plate capable of moving up and down, which is located below the cake blank and is in line with the structure of the part close to the lower end of the cylinder type cavity; the lower die plate is provided with a material return hole in communication with the top and bottom of the cylinder type cavity at the position corresponding to the bottom center of the cylinder type cavity, and the material return hole is provided with a ejector rod in communication with the top and bottom thereof, and the top of the ejector rod is fixedly connected with the bottom of the ejection plate.

[0009] Further, the flange forging device is an annular upper die, the outer diameter of which is in line with the diameter of the flange cavity, the bottom center of which is provided with a conical cavity, and the top center of which is provided with a first punch connection hole in communication with the top and bottom of the conical cavity, and the first punch connection hole is in sleeved connection with the upper punch.

[0010] Further, the flange forging device is an annular flat punch, the outer diameter of which is in line with the diameter of the flange cavity, and the bottom surface of the annular flat punch is horizontal, and the center thereof is provided with a second punch connection hole in communication with the top and bottom thereof, and the second punch connection hole is in sleeved connection with the upper punch.

[0011] Further, a transition part in an arc structure is arranged between the cylinder type cavity and the flange cavity.

[0012] Further, the top of the lower die plate is provided with a concave centering hole, and the bottom of the lower die has a limiting part in embedded connection with the centering hole.

[0013] Further, the wall surface of the cylinder type cavity is a slope, and the diameter of the top of the cylinder type cavity is larger than that of the bottom.

[0014] Compared with the prior art, the cylinder type forge piece die with large diameter flange has the advantages that: the cylinder type forge piece die with large diameter flange adopts a step-by-step closed forging process, a cake blank is pressed into a forged piece cylinder wall through back extrusion, a cylindrical piece blank is made, then a ring-shaped flat punch is used to press the top of the cylindrical piece blank into a flange shape, a required cylinder forge piece is formed, the operation is simple, the stability of processing and manufacturing is good, no folding defects and the like are generated in the upsetting forming process, the quality and processing efficiency of the product are ensured, the forge piece product has high precision, the post-processing allowance is small, and the processing cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the premise of the drawings.

[0016] Figure 1 is a upsetting cake die forging process schematic view in the cylinder type forge piece die with large diameter flange of the present application;

[0017] Figure 2 is a back extrusion process schematic view in the closed die forging die of the present application;

[0018] Figure 3 is a die forging process schematic view in the closed die forging die cooperating with the ring-shaped upper die of the present application;

[0019] Figure 4 is a forging process schematic view in the closed die forging die cooperating with the ring-shaped flat punch of the present application.

[0020] In the drawings: 1, upsetting cake die; 11, lower flat plate; 12, ring sleeve; 13, upper flat plate; 2, blank; 21, cake blank; 22, cylindrical piece blank; 23, cylinder forge piece; 3, closed die forging die; 31, lower backing plate; 311, centering hole; 312, material removal hole; 32, lower die; 321, cylinder cavity; 322, flange cavity; 323, transition part; 324, limiting part; 33, ejector rod; 331, ejector plate; 4, upper punch; 5, ring-shaped upper die; 51, first punch connection hole; 52, conical cavity; 6, ring-shaped flat punch; 61, second punch connection hole. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application. It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In the description of the embodiments of the present application, it should be explained that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, which is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used for differentiation, and cannot be understood as indicating or implying relative importance.

[0023] In addition, if the terms "horizontal", "vertical" and the like appear, they do not mean that the component must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure or component must be completely horizontal, but can be slightly inclined.

[0024] In the description of the embodiments of the present application, "a plurality of" represents at least 2.

[0025] In the description of the embodiments of the present application, it should also be explained that, unless otherwise explicitly specified and limited, if the terms "set", "install", "connected", "connected" appear, they should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, can be connected inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] EMBODIMENT

[0027] Please refer to the attached drawings Figures 1-4 shown in the attached drawings Figures 1-4The utility model discloses a kind of cylinder type forging die and its processing flow diagram with large-diameter flange, for with large-diameter flange cylinder forging processing use, the cylinder type forging die with large-diameter flange of this utility model includes for blank 2 pie blank 21 is forged and is pressed into pie blank 21 and is forged and is pressed into cylinder forging 23 closed die forging die 3 of pie blank 21, blank 2 is usually columnar round bar or pie blank, pie blank die 1 and closed die forging die 3 cooperate die forging hydraulic press use;The pie blank die 1 is made of lower plate 11, ring sleeve 12 and upper plate 13;Lower plate 11 is fixedly installed on the lower die plate of die forging hydraulic press, ring sleeve 12 is fixedly installed on the top surface of lower plate 11, ring sleeve 12 and lower plate 11 are fixedly connected together by bolt, the center of ring sleeve 12 is provided with pie blank forming hole that is communicated up and down, blank 2 is placed in the pie blank forming hole in the center of ring sleeve 12, the bottom of upper plate 13 is horizontal, and it is fixedly installed on the upper die plate of die forging hydraulic press, the upper die plate of die forging hydraulic press can drive the up-and-down movement of upper plate 13, and the upper plate 13 is located above the top of ring sleeve 12, which corresponds to blank 2 placed in ring sleeve 12 up and down, and the upper plate 13 connected with it can be driven downward by the upper die plate of die forging hydraulic press, so that blank 2 located below the upper plate 13 is forged and pressed into pie blank 21;The closed die forging die 3 includes lower pad 31, and the lower pad 31 is fixedly installed on the lower die plate of die forging hydraulic press by bolt, and the top of the lower pad 31 is provided with a lower die 32 fixedly connected thereto, and the lower die 32 and the lower pad 31 are fixedly connected together by bolt, in order to ensure the accuracy of the installation position of the lower die 32 on the lower pad 31, the top of the lower pad 31 is provided with a concave centering hole 311, in order to facilitate the assembly of the lower die 32 and the centering hole 311, the bottom of the lower die 32 has a limiting portion 324 embeddedly matched with the centering hole 311, the outer peripheral contour and height of the limiting portion 324 are matched with the diameter and hole depth of the centering hole 311, and the limiting portion 324 of the lower die 32 is embedded in the centering hole 311 during assembly, and the accuracy of the installation of the lower die 32 on the lower pad 31 can be ensured by the centering hole 311 and the limiting portion 324 matched with each other, and the top center of the lower die 32 is provided with a cavity for forming cylinder forging 23 with large-diameter flange;The cavity is composed of cylinder cavity 321 and flange cavity 322, the flange cavity 322 is located at the top of the cylinder cavity 321, the flange cavity 322 is coaxial with the cylinder cavity 321 up and down, and the diameter of the flange cavity 322 is greater than that of the cylinder cavity 321, the flange cavity 322 is communicated with the top of the lower die 32 up and down, the cylinder cavity 321 penetrates the bottom of the lower die 32, in order to facilitate the smooth extension of pie blank 21 during forging, a transition portion 323 in arc structure is arranged between the cylinder cavity 321 and the flange cavity 322.In order to facilitate the forging from the lower die 32 demoulding, the wall of the cylindrical cavity 321 is inclined, the diameter of the top of the cylindrical cavity 321 is larger than the bottom, the wall of the cylindrical cavity 321 is 0.5 degrees, the biscuit 21 is placed in the cylindrical cavity 321; in order to facilitate the forging from the lower die 32 cavity demoulding, the cylindrical cavity 321 is provided with a top plate 331 which can move up and down, the top plate 331 is below the biscuit 21, the biscuit 21 is placed on the top of the top plate 331, the top plate 331 is consistent with the structure of the part close to the lower end of the cylindrical cavity 321, the top plate 331 can move up and down in the cylindrical cavity 321; in order to facilitate the driving of the top plate 331 up and down, the lower die 31 is provided with a hole 312 which is connected with the bottom of the cylindrical cavity 321, the hole 312 is provided with a top rod 33 which can move up and down, the top of the top rod 33 is fixedly connected with the bottom of the top plate 331, the top of the top rod 33 is provided with a thread connection part which protrudes upward, the bottom of the top plate 331 is provided with a thread hole which is threadedly connected with the thread connection part of the top rod 33, the top rod 33 and the top plate 331 are screwed together, the top rod 33 is fixedly connected with the demoulding mechanism of the die forging hydraulic machine, which can drive the top rod 33 and the top plate 331 connected with the top of the top rod 331 to move up and down; in order to facilitate the forming of the cylinder, the part above the biscuit 21 in the cylindrical cavity 321 is provided with an upper punch 4, the center of the end face of the upper punch corresponds with the center of the end face of the cylindrical cavity 321 and the biscuit 21 placed in the cylindrical cavity 321, the die forging hydraulic machine can drive the punch 4 downward through the upper die plate, and the biscuit 21 placed in the cylindrical cavity 321 is pressed downward by the punch 4, so that the biscuit 21 is extruded and formed into a cylindrical blank 22, in order to facilitate the forming of the flange part, the upper end of the punch 4 is sleeved with a flange forging device which can slide up and down, the flange forging device can be embeddedly connected with the flange cavity 322, and the die forging hydraulic machine can extrude the flange forging device downward through the upper die plate, so that the upper end of the cylindrical blank 22 is extruded and formed in the flange cavity 322 to form the flange part. In order to facilitate the forming of the flange part and ensure that the flange part will not be folded, the flange forging device is composed of an annular upper die 5 and an annular flat punch 6, the annular upper die 5 and the annular flat punch 6 are two process parts for flange forming, the outer diameter of the annular upper die 5 is consistent with the diameter of the flange cavity 322, the bottom center is provided with a conical cavity 52, the top center is provided with a first punch connection hole 51 which is connected with the conical cavity 52, the conical cavity 52 is conical and inclined, which can upset the upper end of the cylindrical blank 22 to form a conical shape with small upper end and large lower end, so as to reduce the height-diameter ratio and prevent the upsetting from being folded after the annular flat punch 6 is replaced.The tapered cavity 52 has a tapered angle divided into two sections: a smaller angle at the top and a larger angle at the bottom. The smaller angle at the top reduces the amount of metal material involved in deformation at the opening, thus lowering the height-to-diameter ratio and improving stability during forming. It also forces the blank to adhere tightly to the upper punch 4, preventing internal hole folding defects. The larger angle at the bottom increases the cylinder wall thickness, reduces the height-to-diameter ratio, and facilitates subsequent upsetting. The first punch connecting hole 51 is fitted into the upper punch 4. The outer diameter of the annular flat punch 6 matches the diameter of the flange cavity 322, and its bottom surface is horizontal. The center of the annular flat punch 6 has a second punch connecting hole 61 that connects vertically, and the second punch connecting hole 61 is fitted into the upper punch 4.

[0028] Its specific working principle is as follows: First, refer to the instruction manual appendix. Figure 1 As shown, the heated round bar, i.e., the billet 2, is placed in the blank forming hole of the ring 12. The die forging hydraulic press drives the upper plate 13 to press down until the outer circle of the blank 21 contacts the inner wall of the blank forming hole in the ring 12, so that the billet 2 is forged into a blank 21 that meets the requirements; the second step is to refer to the appendix of the instruction manual. Figure 2 As shown, the blank 21 is placed into the cavity of the lower die 32, and the blank 21 is positioned on the top surface of the ejector plate 331, located inside the cylindrical cavity 321. The upper punch 4 is fixedly installed on the upper platen of the forging hydraulic press. The forging hydraulic press drives the upper punch 4 downward through its upper platen to extrude the blank 21 into a cylindrical blank 22, ensuring the thickness of the bottom of the cylinder. For the third step, refer to the appendix of the instruction manual. Figure 3 As shown, the upper punch 4 is removed from the upper platen of the forging hydraulic press, but the upper punch 4 is not removed from the cylindrical blank 22. The annular upper die 5 is placed on the outside of the upper end of the upper punch 4 and positioned using the first punch connecting hole 51. Then, the forging hydraulic press drives the upper platen downward, and the upper platen pushes the annular upper die 5 downward along the upper punch 4. When the annular upper die 5 is pressed down until its top is flush with the top of the upper punch 4, the upper part of the cylindrical blank 22 is upset into a cone with a small height-to-diameter ratio. Fourth part, refer to the appendix of the instruction manual. Figure 4 As shown, the annular upper die 5 is removed and replaced with an annular flat punch 6. The second punch connecting hole 61 is used for positioning. The die forging hydraulic press drives the upper platen downward. The upper platen pushes the annular flat punch 6 downward along the upper punch 4 until the top of the annular flat punch 6 is pressed down to be flush with the top of the upper punch 4, forming a cylinder forging 23 with a large diameter flange.

[0029] The cylinder barrel type forging die of the cylinder barrel type forging with a large-diameter flange adopts a step-by-step closed forging process, and a cake blank is pressed into a cylinder wall of a shaped forging by backward extrusion to manufacture a cylinder blank, then a ring flat punch 6 is used to press the top of the cylinder blank 22 into a flange shape to form a required cylinder forging 23, the operation is simple, the stability of the processing and manufacturing is good, no folding and other defects are generated in the upsetting forming process, the product quality and processing efficiency are ensured, the forging product precision is high, the post-processing allowance is small, and the processing cost is reduced.

[0030] It should be emphasized that the above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A swage die for a cylinder-type swage forging with a large-diameter flange, characterized by: The application relates to a closed die forging die (3) for forging a cylinder forging (23) from a pie blank (21) which is forged from a blank (2) by a pie upsetting die (1); the pie upsetting die (1) is composed of a lower flat plate (11), a ring sleeve (12) and an upper flat plate (13); the ring sleeve (12) is fixedly installed on the top surface of the lower flat plate (11), the blank (2) is placed in the ring sleeve (12), and the upper flat plate (13) is movably arranged above the top of the ring sleeve (12) and corresponds to the blank (2) placed in the ring sleeve (12) in a top-to-bottom manner; the upper flat plate (13) can be lowered to forge the blank (2) into the pie blank (21); the closed die forging die (3) comprises a lower base plate (31), the top of the lower base plate (31) is provided with a lower die (32) fixedly connected thereto, the top center of the lower die (32) is provided with a cavity for forming the cylinder forging (23); the cavity is composed of a cylinder cavity (321) and a flange cavity (322), the cylinder cavity (321) penetrates through the bottom of the lower die (32), the flange cavity (322) is located at the top of the cylinder cavity (321) and has a diameter larger than that of the cylinder cavity (321); the pie blank (21) is placed in the cylinder cavity (321); an upper punch (4) is arranged at the position above the pie blank (21) in the cylinder cavity (321), the upper end of the punch (4) is sleeved with a flange forging device which is in sliding fit with the punch (4) in a top-to-bottom manner, and the flange forging device can be embeddedly matched with the flange cavity (322).

2. A swage die for a cylinder-type swage forging with a large diameter flange according to claim 1, characterized in that: A top ejection plate (331) which can move up and down is arranged in the cylinder cavity (321) and is located below the pie blank (21) and matched with the structure of the position close to the lower end of the cylinder cavity (321); a material ejection hole (312) which is in communication in a top-to-bottom manner is arranged on the lower base plate (31) and corresponds to the bottom center of the cylinder cavity (321), a top rod (33) which is in sliding fit with the material ejection hole (312) in a top-to-bottom manner is arranged in the material ejection hole (312), and the top of the top rod (33) is fixedly connected with the bottom of the top ejection plate (331).

3. The swage die for a cylinder-type swage forging with a large-diameter flange according to claim 1, characterized by: The flange forging device is a ring-shaped upper die (5) which has an outer diameter matched with that of the flange cavity (322), a conical cavity (52) arranged at the bottom center and a first punch connecting hole (51) arranged at the top center and in communication with the conical cavity (52) in a top-to-bottom manner, and the first punch connecting hole (51) is in sleeve fit with the upper punch (4) in a top-to-bottom manner.

4. The swage die for a cylinder-type swage forging with a large diameter flange according to claim 1, characterized by: The flange forging device is a ring-shaped flat punch (6) which has an outer diameter matched with that of the flange cavity (322), a bottom surface of the ring-shaped flat punch (6) is horizontal, a second punch connecting hole (61) which is in communication in a top-to-bottom manner is arranged at the center of the ring-shaped flat punch (6), and the second punch connecting hole (61) is in sleeve fit with the upper punch (4) in a top-to-bottom manner.

5. The swage die for a cylinder-type swage forging with a large diameter flange according to claim 1, characterized by: An arc-shaped transition part (323) is arranged between the cylinder cavity (321) and the flange cavity (322).

6. A swage die for a cylinder-type swage forging with a large diameter flange according to claim 1, characterized in that: The top of the lower base plate (31) is provided with a concave centering hole (311), and the bottom of the lower die (32) is provided with a limiting part (324) which is embeddedly matched with the centering hole (311).

7. The swage die for a cylinder-type swage forging with a large diameter flange according to claim 1, characterized by: The wall surface of the barrel cavity (321) is a slope, and the diameter of the top of the barrel cavity (321) is greater than that of the bottom.

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