Hot die forging die for forming crucible

Abstract

The hot die forging die comprises an upper die fixing base fixed to the bottom face of an upper die frame in the middle and a lower die fixing base fixed to the upper end face of a lower die frame in the middle, and a self-resetting male die device is arranged on the bottom face of the upper die fixing base; a conical die holder is installed on the lower die fixing seat through a quick dismounting and replacing structure, an ejector block fixedly connected with the lower die frame and the lower die fixing seat into a whole is arranged at the lower end of an inner hole of the conical die holder in a matched mode, and a female die with the lower end matched with the inner hole of the conical die holder is fixed to the conical die holder through a quick dismounting assembly. And a die cavity used for forming the outer contour of the crucible in the middle of the female die corresponds to a die column used for forming the inner cavity of the crucible in the self-resetting male die device up and down. According to the utility model, one-time punch forming of the crucible is realized, the defect that an existing die is large in material loss and cannot realize one-time hot die forging forming is overcome, the machining difficulty of the crucible is reduced, the machining efficiency is improved, materials cannot be wasted, and the machining cost and the material cost are reduced.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology, specifically relating to a hot forging mold for crucible forming. Background Technology

[0002] Crucibles are containers used for melting and refining molten metals, as well as for solid-liquid heating and reactions. They are widely used in laboratories, metal smelting, semiconductor and superconductor production, and other technological fields. Currently, crucibles are formed using machine tools. For example, circular targets are machined to a predetermined size using a sawing machine according to the crucible's specifications. These crucibles used for machining not only have low processing efficiency but also high processing losses and costs. To solve these problems, our company designed a solution with patent number 202321403733.0 and patent name "Hot Forging Die for Target Forming" (hereinafter referred to as the prior art) for hot forging of targets and crucibles, thereby solving the problems of low processing efficiency, high material loss and high cost of crucibles. The prior art specifically includes a lower die holder 1 with a lower die fixing seat 2 fixed on the upper surface, an upper die holder 11 with an upper die fixing seat 12 fixed on the lower surface, a lower die fixing outer ring 3 fixed on the upper part of the lower die fixing seat 2, and a lower die 5 for target formation installed in the center of the lower die fixing outer ring 3 through a quick disassembly and replacement structure. The lower part of the inner cavity of the lower die 5 is provided with a top block 9; the lower part of the upper die fixing seat 12 is fixed with a target forming... The upper punch 13 and the lower die 5 are coaxial and correspond to each other. The target material, after being heated in the heating furnace, is placed in the inner cavity of the lower die 5 and located between the upper punch 13 and the top block 9. During the process of the upper die holder 11 driving the upper punch 13 to move downward, the target material is hot-forged through the die to achieve one-time stamping. Although the above structure can solve the problems of the machined crucible, the outer circumferential wall and inner wall of the hollow crucible are both conical, while the outer wall of the crucible processed in the prior art is a solid structure of equal diameter, which requires multiple machining processes to form. Furthermore, since the material formed by hot die forging is a solid material, processing it into a hollow crucible requires repeated machining, resulting in large material loss. Finally, the forged billet is difficult to demold, which is time-consuming and labor-intensive. Therefore, it is necessary to improve the above-mentioned problems. Utility Model Content

[0003] The technical problem solved by this utility model is to provide a hot forging die for crucible forming. After the crucible blank is heated, a self-resetting punch device and a die are set to perform hot forging operation on the crucible blank, so as to realize the one-time stamping forming of the crucible. This solves the drawback of the current die having large material loss and being unable to form a crucible in one hot forging. It reduces the processing difficulty of the crucible, improves the processing efficiency, does not waste materials, and reduces machining and material costs.

[0004] The technical solution adopted in this utility model is as follows: a hot forging die for crucible forming, including an upper die fixing seat fixed in the center on the bottom surface of the upper die frame and a lower die fixing seat fixed in the center on the upper end surface of the lower die frame. The bottom surface of the upper die fixing seat is provided with a self-resetting punch device that can be quickly demolded. A conical die seat is installed on the lower die fixing seat through a quick disassembly and replacement structure. The lower end of the inner hole of the conical die seat is adapted to a top block that is fixedly connected to the lower die frame and the lower die fixing seat. A concave die with its lower end adapted to the inner hole of the conical die seat is fixed on the conical die seat through a quick disassembly assembly. The upper end surface of the top block is flush with the bottom surface of the concave die and corresponds to the lower port position of the die cavity in the middle of the concave die for forming the outer contour of the crucible. The die cavity is also arranged vertically to correspond to the die column in the self-resetting punch device for forming the inner cavity of the crucible.

[0005] The self-resetting punch device includes an upper fixed seat, a lifting seat, and a die column. The lower end of the die column passes through a stepped hole in the middle of the upper fixed seat, and the upper end of the die column is adapted and positioned in the stepped hole on the upper fixed seat. The centering boss in the middle of the bottom surface of the upper fixed seat is adapted to the stepped hole in the middle of the upper fixed seat and abuts against the upper end face of the die column. The upper fixed seat is detachably fixed to the bottom surface of the upper fixed seat. The lifting seat is located below the upper fixed seat and is elastically connected to the upper fixed seat through an elastic connecting component. The lower end of the die column passes through the stepped hole in the middle of the lifting seat, and a second spring fitted on the die column is adapted to the stepped hole in the middle of the lifting seat. The upper and lower ends of the second spring abut against the corresponding step surface of the upper end of the die column and the step surface of the stepped hole of the lifting seat for axial positioning. The convex ring at the lower end of the lifting seat passes through the center hole of the quick-release component and is adapted to the groove on the upper end face of the die. During the process of the upper die frame driving the die column to move down, the blank placed in the die cavity is hot forged and formed with the cooperation of the die column and the die.

[0006] Furthermore, the upper fixing seat plate has multiple countersunk holes evenly distributed around its circumference, and the upper fixing seat is detachably fixed to the bottom surface of the upper mold fixing seat by screws located in the countersunk holes.

[0007] Furthermore, the elastic connection assembly includes a spring, and the upper fixed seat end face is evenly distributed with a plurality of stepped holes, each with a round hole at the lower end and a threaded hole at the upper end. The lifting seat is provided with stepped holes two, which are in the same number and position as the stepped holes one. The upper and lower ends of the spring are respectively inserted into the stepped holes one and two, and are axially positioned by the stepped surfaces in the stepped holes one and two. The long bolt passes through the lower end of the stepped hole two, through the spring one, and is adapted to the threaded hole at the upper end of the stepped hole one to achieve an elastic connection between the lifting seat and the upper fixed seat.

[0008] Furthermore, the upper end of the mold column is a stepped column, while the lower end has a structure whose outer contour has the same shape and size as the inner cavity of the crucible.

[0009] Furthermore, the quick-release assembly includes a pressure plate, which is an integral structure made of a central circular pressure ring and ear plates on the outer walls of both sides of the circular pressure ring. The central circular ring of the pressure plate is placed on the protruding edge of the upper end of the die, and the screws passing through the through holes on the ear plates on both sides of the pressure plate are adapted to and connected to the screw holes at the corresponding positions on the upper end face of the conical die base, so as to realize the pressure plate on the conical die base for pressing and fixing.

[0010] Furthermore, the quick disassembly and replacement structure includes a lower mold fixing outer ring and a conical pressure ring. The lower mold fixing outer ring is adapted to be fixed to the upper end face of the lower mold fixing seat, and the conical pressure ring, which is adapted to be fixed in the upper end hole of the lower mold fixing outer ring and is adapted to the conical section of the conical mold seat, detachably fixes the conical mold seat to the lower mold fixing seat.

[0011] Advantages of this utility model compared to the prior art:

[0012] 1. In this technical solution, after the crucible blank is heated, a self-resetting punch device and a die are set to perform hot forging of the crucible blank, so as to realize the one-time stamping forming of the crucible. This solves the drawback of the current mold having large material loss and being unable to form a one-time hot forging, reduces the processing difficulty of the crucible, improves the processing efficiency, does not waste materials, and reduces machining and material costs.

[0013] 2. This technical solution does not require major modifications to the original structure. It only requires removing the upper punch, installing a self-resetting punch device with automatic demolding function on the upper die fixing seat, and installing the die on the conical die seat. With the cooperation of the die and the self-resetting punch device, the hollow crucible can be formed by hot forging in one go, which greatly reduces the amount of raw materials used and significantly reduces material costs and subsequent machining costs.

[0014] 3. The lifting seat of this technical solution is connected to the upper fixed seat by multiple springs in a detachable elastic structure, and combined with springs two mounted on the mold column, so that the mold column can extend out of the lifting seat and cooperate with the die for hot forging after the lifting seat moves up. At the same time, it facilitates the automatic demolding of the crucible and mold column formed by die forging, reduces the demolding difficulty and improves the demolding efficiency.

[0015] 4. This technical solution uses a pressure plate and screws to detachably fix the die to the conical die base, providing convenient disassembly and assembly conditions for die replacement. Combined with the convenient disassembly structure of the die column, it facilitates the processing of crucibles of different models.

[0016] 5. This technical solution has a simple structure, novel design, quick assembly and disassembly, saves time and effort, provides conditions for optimizing crucible processing procedures, and has high application value. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram showing the state of the mold column when it is pressed down to the forming position. Detailed Implementation

[0019] The following will be based on the embodiments of this utility model. Figure 1-2 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] It should be noted that, unless otherwise stated herein, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In this document, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0022] Hot forging dies for crucible forming, such as Figure 1-2As shown, the system includes an upper mold fixing seat 2 centrally fixed to the bottom surface of the upper mold frame 1 and a lower mold fixing seat 4 centrally fixed to the upper end surface of the lower mold frame 3. The bottom surface of the upper mold fixing seat 2 is provided with a self-resetting punch device. A conical mold base 6 is installed on the lower mold fixing seat 4 through a quick-release replacement structure. The lower end of the inner hole of the conical mold base 6 is adapted to a top block 8 that is integrally connected with the lower mold frame 3 and the lower mold fixing seat 4. A concave mold 9 with its lower end adapted to the inner hole of the conical mold base 6 is fixed on the conical mold base 6 through a quick-release assembly. The upper end surface of the top block 8 is flush with the bottom surface of the concave mold 9 and corresponds to the lower port position of the mold cavity 10 in the middle of the concave mold 9 used for forming the outer contour of the crucible. Furthermore, the mold cavity 10 and the mold pillar 11 used for forming the inner cavity of the crucible in the self-resetting punch device are arranged vertically in corresponding positions. The top block 8 is a trapezoidal column structure with an upper diameter smaller than the lower diameter. The crucible formed by hot forging in the mold cavity 10 is ejected from the upper end of the upper top block 8 for demolding. In the above structure, after the crucible blank is heated, the crucible blank is hot forged by setting the self-resetting punch device and the die 9, realizing the one-time stamping forming of the crucible. This solves the drawback of the current mold having large material loss and being unable to form the crucible by hot forging in one step, reduces the processing difficulty of the crucible, improves the processing efficiency, does not waste materials, and reduces machining and material costs.

[0023] The specific structure of the self-resetting punch device is as follows: The self-resetting punch device includes an upper fixed seat 12, a lifting seat 13, and a die column 11. The lower end of the die column 11 passes through a stepped hole in the middle of the upper fixed seat 12, and the upper end of the die column 11 is adapted and positioned in the stepped hole on the upper fixed seat 12. The centering boss in the middle of the bottom surface of the upper die fixed seat 12 is adapted to the stepped hole in the middle of the upper fixed seat 12 and abuts against the upper end face of the die column 11. The stepped hole and the upper end of the die column 11 cooperate to perform axial positioning. The upper fixed seat 12 is detachably fixed to the bottom surface of the upper die fixed seat 2. The lifting seat 13 is located below the upper fixed seat 12, and the lifting seat 13 is elastically connected to the upper fixed seat 12 through an elastic connecting component. The lower end of the die column 11 passes through the stepped hole in the middle of the lifting seat 13, and a spring 17 fitted on the die column 11 is adapted to the stepped hole in the middle of the lifting seat 13. The upper and lower ends of the spring 17 abut against the upper end of the die column 11 respectively. Axial positioning is achieved on the stepped surface of the upper mold base 13 and the stepped surface of the stepped hole of the lifting seat 13. The convex ring at the lower end of the lifting seat 13 passes through the center hole of the quick-release assembly and is adapted to the groove on the upper end face of the die 9. The structure in which the convex ring on the lifting seat 13 is adapted to the upper end face of the die 9 can ensure the relative position of the lifting seat 13 and the die 9 while limiting the downward movement of the lifting seat 13. Thus, under the action of spring 16 and spring 27, the mold column 11 continues to move downward. During the process of the upper mold frame 1 driving the mold column 11 to move downward, the blank placed in the mold cavity 10 is hot forged and formed under the cooperation of the mold column 11 and the die 9. The upper end of the mold column 11 is a stepped column and the lower end is a structure with the same shape and size as the inner cavity of the crucible. Specifically, multiple countersunk holes are evenly distributed around the circumference of the upper fixed seat 12 plate surface, and the upper fixed seat 12 is detachably fixed to the bottom surface of the upper mold fixed seat 2 by screws provided in the countersunk holes.

[0024] The specific structure of the elastic connection component is as follows: The elastic connection component includes a spring 16, and a plurality of stepped holes 14 with round holes at the lower end and threaded holes at the upper end are evenly distributed on the end face of the upper fixed seat 12. The lifting seat 13 is provided with stepped holes 15 corresponding to the stepped holes 14 in position and in the same number. The upper and lower ends of the spring 16 are respectively inserted into the stepped holes 14 and the stepped holes 15, and are axially positioned by the stepped surfaces in the stepped holes 14 and the stepped holes 15. The long bolt passes through the lower end of the stepped hole 15, through the spring 16, and is adapted to the threaded hole at the upper end of the stepped hole 14 to achieve the elastic connection between the lifting seat 13 and the upper fixed seat 12.

[0025] In the above structure, the lifting seat 13 is detachably and elastically connected to the upper fixed seat 12 by multiple springs 16, and combined with the springs 17 mounted on the mold column 11, so that the mold column 11 can extend out of the lifting seat 13 and cooperate with the die 9 for hot forging after the lifting seat 13 moves up. At the same time, it facilitates the automatic demolding of the crucible and the mold column 10 during die forging, reduces the demolding difficulty, and improves the demolding efficiency.

[0026] When the mold column 11 moves down to its position, the hot forging process of the crucible is completed. At this time, the upper mold frame 1 drives the self-resetting punch device to move up as a whole. Under the action of the spring force of spring 16 and spring 27, the lifting seat 13 moves down to reset, thereby separating the formed crucible from the lower end of the mold column 11.

[0027] The specific structure of the quick-release assembly is as follows: The quick-release assembly includes a pressure plate 18, which is an integral structure made of a central circular pressure ring and ear plates on the outer walls of both sides of the circular pressure ring. The central circular ring of the pressure plate 18 is placed on the upper flange of the die 9, and the screws passing through the through holes on the ear plates on both sides of the pressure plate 18 are adapted to the screw holes at the corresponding positions on the upper end face of the conical mold base 6, so as to realize the pressure plate 18 on the conical mold base 6 for pressing and fixing. The upper end of the die 9 is slightly higher than the upper end face of the conical mold base 6, so that the pressure plate 18 can press and fix the die 9 in the conical mold base 6 through the screws. In the above structure, the structure of using the pressure plate 18 and screws to detachably fix the die 9 on the conical mold base 6 provides convenient disassembly and assembly conditions for replacing the die 9. Combined with the convenient disassembly structure of the mold column 11, it is convenient to process crucibles of different models and has a wide processing range.

[0028] No major modifications are required to the original structure. Simply remove the upper punch, install a self-resetting punch device with automatic demolding function on the upper die fixing seat 2, and install the concave die 9 on the conical die seat 6. With the cooperation of the concave die 9 and the self-resetting punch device, the hollow crucible can be formed by hot die forging in one go, which greatly reduces the amount of raw materials used and significantly reduces material costs and subsequent machining costs.

[0029] The specific structure of the quick disassembly and replacement structure is as follows: The quick disassembly and replacement structure includes a lower mold fixing outer ring 5 and a conical pressure ring 7. The lower mold fixing outer ring 5 is adapted to be fixed to the upper end face of the lower mold fixing seat 4, and the conical pressure ring 7, which is adapted to be fixed in the upper end hole of the lower mold fixing outer ring 5 and is adapted to the conical section of the conical mold seat 6, detachably fixes the conical mold seat 6 to the lower mold fixing seat 4.

[0030] The lifting guide structure of the upper mold frame 1 and the lower mold frame 3 is the original structure, which is the existing technology, and will not be described in detail here.

[0031] This technical solution has a simple structure, novel design, quick assembly and disassembly, saves time and effort, provides conditions for optimizing crucible processing procedures, and has high application value.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A hot forging die for crucible forming, characterized in that: The device includes an upper mold fixing seat (2) fixed in the center to the bottom surface of the upper mold frame (1) and a lower mold fixing seat (4) fixed in the center to the upper end surface of the lower mold frame (3). The bottom surface of the upper mold fixing seat (2) is provided with a self-resetting punch device that can be quickly demolded. A conical mold seat (6) is installed on the lower mold fixing seat (4) through a quick disassembly and replacement structure. The lower end of the inner hole of the conical mold seat (6) is adapted to a top block (8) that is fixedly connected to the lower mold frame (3) and the lower mold fixing seat (4). A concave mold (9) with its lower end adapted to the inner hole of the conical mold seat (6) is fixed on the conical mold seat (6) through a quick disassembly assembly. The upper end surface of the top block (8) is flush with the bottom surface of the concave mold (9) and corresponds to the lower port position of the mold cavity (10) in the middle of the concave mold (9) used for forming the outer contour of the crucible. The mold cavity (10) is set vertically and vertically to the mold column (11) in the self-resetting punch device used for forming the inner cavity of the crucible.

2. The hot forging die for crucible forming according to claim 1, characterized in that: The self-resetting punch device includes an upper fixed seat (12), a lifting seat (13), and a die column (11). The lower end of the die column (11) passes through the stepped hole in the middle of the upper fixed seat (12), and the upper end of the die column (11) is adapted and positioned in the stepped hole on the upper fixed seat (12). The centering boss in the middle of the bottom surface of the upper die fixed seat (2) is adapted to the stepped hole in the middle of the upper fixed seat (12) and abuts against the upper end face of the die column (11). The upper fixed seat (12) is detachably fixed to the bottom surface of the upper die fixed seat (2). The lifting seat (13) is located below the upper fixed seat (12), and the lifting seat (13) is elastically connected to the upper fixed seat (12) through an elastic connecting component. The lower end of the mold column (11) passes through the stepped hole in the middle of the lifting seat (13), and the second spring (17) fitted on the mold column (11) is adapted to the stepped hole in the middle of the lifting seat (13). The upper and lower ends of the second spring (17) abut against the step surface corresponding to the upper end of the mold column (11) and the step surface of the stepped hole of the lifting seat (13) for axial positioning. The convex ring at the lower end of the lifting seat (13) passes through the center hole of the quick-release assembly and is adapted to the groove on the upper end surface of the die (9). During the process of the upper mold frame (1) driving the mold column (11) to move down, the blank placed in the mold cavity (10) is hot forged and formed under the cooperation of the mold column (11) and the die (9).

3. The hot forging die for crucible forming according to claim 2, characterized in that: The upper fixing seat (12) has multiple countersunk holes evenly distributed around its circumference, and the upper fixing seat (12) is detachably fixed to the bottom surface of the upper mold fixing seat (2) by screws located in the countersunk holes.

4. The hot forging die for crucible forming according to claim 3, characterized in that: The elastic connection assembly includes a spring (16), and the upper fixed seat (12) has a plurality of stepped holes (14) with round holes at the bottom and threaded holes at the top evenly distributed on the circumference of the end face. The lifting seat (13) has stepped holes (15) with the same number of positions corresponding to the stepped holes (14). The upper and lower ends of the spring (16) are respectively inserted into the stepped holes (14) and the stepped holes (15), and are axially positioned by the stepped surfaces in the stepped holes (14) and the stepped holes (15). The long bolt passes through the lower end of the stepped hole (15) through the spring (16) and is adapted to the threaded hole at the upper end of the stepped hole (14) to realize the elastic connection between the lifting seat (13) and the upper fixed seat (12).

5. The hot forging die for crucible forming according to claim 4, characterized in that: The upper end of the mold column (11) is a stepped column, while the lower end has an outer contour that is the same as the shape and size of the crucible cavity.

6. The hot forging die for crucible forming according to claim 1, characterized in that: The quick-release assembly includes a pressure plate (18), which is an integral structure made of a central circular pressure ring and ear plates on the outer walls of both sides of the circular pressure ring. The central circular ring of the pressure plate (18) is placed on the upper edge of the concave mold (9), and the screws passing through the through holes on the ear plates on both sides of the pressure plate (18) are adapted to the screw holes at the corresponding positions on the upper surface of the conical mold base (6) to achieve the pressing and fixing of the pressure plate (18) on the conical mold base (6).

7. The hot forging die for crucible forming according to any one of claims 1-6, characterized in that: The quick disassembly and replacement structure includes a lower mold fixing outer ring (5) and a conical pressure ring (7). The lower mold fixing outer ring (5) is adapted to be fixed on the upper end face of the lower mold fixing seat (4), and the conical pressure ring (7), which is adapted to be fixed in the upper end hole of the lower mold fixing outer ring (5) and is adapted to the conical section of the conical mold seat (6), detachably fixes the conical mold seat (6) to the lower mold fixing seat (4).

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