Thin-wall high cylinder piece forming device and blank

Abstract

The utility model relates to the technical field of forging forming, in particular to a thin-wall high cylinder part forming device and a blank, the thin-wall high cylinder part forming device comprises a moulding bed, a first centering plate, an upper punch and a lower punch, a cavity used for containing the blank is formed in the moulding bed, a first inner hole is formed in the first centering plate, and a second inner hole is formed in the second centering plate; the forming die is used for being arranged at the top of the first centering plate, the lower punch is used for being in clearance fit with the first inner hole, the upper punch is used for being arranged above the cavity, and the upper punch, the cavity, the first inner hole and the lower punch are coaxially arranged. The inner diameter of the first inner hole, the diameter of the upper punch and the diameter of the lower punch are all smaller than the inner diameter of the cavity, and the upper punch and the lower punch are both used for making contact with a blank arranged in the cavity. The utility model aims to provide the thin-wall high cylinder part forming device and the blank aiming at at least one technical problem related in the background technology.

Description

Technical Field

[0001] This application relates to the field of forging technology, and more specifically, to a thin-walled high-cylinder forming apparatus and a blank. Background Technology

[0002] The typical characteristics of thin-walled tall cylindrical forgings are thin walls and large height. At present, the main forming technology solutions for thin-walled tall cylindrical forgings are to use ordinary forging equipment for a step-by-step forming process of "punching combined with mandrel drawing", or to use special extrusion equipment for "extrusion" forming.

[0003] However, the former has lower production efficiency in its forming process; the latter requires a large investment in equipment and molds and has higher production costs. Utility Model Content

[0004] The purpose of this application is to provide a thin-walled high-cylinder forming apparatus and a blank to address at least one of the technical problems involved in the background art.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] One aspect of this application provides a thin-walled high-cylinder forming apparatus, including a die, a first centering plate, an upper punch, and a lower punch. A cavity for placing a blank is formed on the die, and a first inner hole is formed on the first centering plate. The die is disposed on top of the first centering plate. The lower punch is clearance-fitted with the first inner hole. The upper punch is disposed above the cavity. The upper punch, the cavity, the first inner hole, and the lower punch are all coaxially arranged. The inner diameter of the first inner hole, the diameter of the upper punch, and the diameter of the lower punch are all smaller than the inner diameter of the cavity. The upper punch and the lower punch are both used to contact the blank disposed in the cavity.

[0007] Optionally, the mold includes a mold body and a lower mold boss. The lower mold boss is formed at the bottom of the mold body. The first centering plate includes a first body. An upper centering positioning groove is formed on the top surface of the first body. The lower mold boss cooperates with the upper centering positioning groove. The lower mold boss is a circular boss, and the upper centering positioning groove is a circular groove. Both the lower mold boss and the upper centering positioning groove are coaxially arranged with the cavity.

[0008] The beneficial effects of this technical solution are as follows: On the one hand, when the mold is placed on the first centering plate, the cooperation between the lower boss of the mold and the upper positioning groove of the centering plate can quickly realize the positioning and cooperation between the mold and the first centering plate, thereby improving work efficiency while realizing the centering and assembly between the mold and the first centering plate. On the other hand, when the lower boss of the mold and the upper positioning groove of the centering plate are in cooperation, the problem of relative horizontal movement between the mold and the first centering plate is less likely to occur during the pressing of the upper punch, thereby improving the stability and reliability during use and increasing the yield of the product.

[0009] Optionally, the thin-walled high-cylinder forming apparatus provided in this application further includes a slug, in which a receiving cavity is formed, the first centering plate is disposed on the top of the slug, the first inner hole is used to communicate with the receiving cavity, and the receiving cavity is used to receive the punch.

[0010] The beneficial effect of this technical solution is that the slug can support the first pair of middle plates and receive and accommodate the upper punch, lower punch and punch core punched down from the billet when the upper punch presses down on the billet.

[0011] Optionally, the receiving cavity includes a receiving channel and a retrieval channel. The receiving channel is coaxially arranged with the cavity. The inner diameter of the receiving channel is larger than the inner diameter of the first inner hole. A retrieval port is formed on the sprue. The length direction of the retrieval channel is perpendicular to the axial direction of the receiving channel. The retrieval channel connects the retrieval port and the receiving channel.

[0012] The beneficial effects of this technical solution are as follows: Since the inner diameter of the receiving channel is larger than the inner diameter of the first inner hole, the upper punch, lower punch, and punch core can fall smoothly into the receiving cavity. By setting up the retrieval port and retrieval channel, it is convenient for workers to retrieve and recycle the fallen upper punch, punch core, and lower punch through the retrieval port and retrieval channel.

[0013] Optionally, the first centering plate includes a first body and a lower centering boss. The lower centering boss is formed at the bottom of the first body, and a positioning groove on the upper surface of the drain plate is formed thereon. The lower centering boss is used to cooperate with the upper positioning groove. Both the lower centering boss and the positioning groove on the drain plate are coaxially arranged with the storage channel.

[0014] The beneficial effects of this technical solution are as follows: by setting up a centering lower boss and a positioning groove on the sprue plate that cooperate with each other, the first centering plate and the sprue plate are aligned and assembled, thereby making the first centering plate bear the force evenly, reducing deformation, and improving service life. At the same time, the upper punch, punch core and lower punch can be smoothly discharged, and the assembly efficiency between the first centering plate and the sprue plate is improved, as well as the stability of the fit between the first centering plate and the sprue plate is improved.

[0015] Optionally, the cavity includes a molded part receiving section and an overflow prevention section located above the molded part receiving section.

[0016] The beneficial effect of this technical solution is that the length of the cavity will be slightly greater than the length of the target thin-walled high cylindrical part, which can prevent excess material from overflowing from the top during the molding process.

[0017] Optionally, the thin-walled high-cylinder forming apparatus provided in this application further includes a second centering plate, on which a second inner hole is formed, and a lower centering positioning groove is formed on the bottom surface of the second centering plate. The mold includes a mold body and an upper mold boss, the upper mold boss is formed on the top of the mold body, the lower centering positioning groove is used to cooperate with the upper mold boss, and the second inner hole, the lower centering positioning groove and the upper mold boss are all used to be coaxially arranged with the cavity. The upper punch is used to be disposed in the second inner hole.

[0018] The beneficial effect of this technical solution is that it facilitates the alignment and assembly of the mold and the second centering plate, thereby allowing the upper punch to be aligned and placed on the blank.

[0019] Optionally, the thin-walled high-cylinder forming apparatus provided in this application further includes a punch connecting rod for being disposed on the top of the upper punch. The punch connecting rod is coaxially disposed with the upper punch. The punch connecting rod is used to contact the hammer anvil. Both the punch connecting rod and the upper punch are used to transition fit with the second inner hole. Both the punch connecting rod and the upper punch are used to clearance fit with the first inner hole.

[0020] The beneficial effects of this technical solution are as follows: by using both the punch connecting rod and the upper punch for transitional fit with the second inner hole, it is beneficial for the punch connecting rod and the upper punch to be fully aligned and not to deviate during the punching process; by using both the punch connecting rod and the upper punch for clearance fit with the first inner hole, it is convenient for the punch connecting rod and the upper punch to smoothly pass through the first inner hole.

[0021] Optionally, the sum of the length of the upper punch and the length of the punch connecting rod is greater than the sum of the length of the cavity and the length of the second inner hole.

[0022] The beneficial effect of this technical solution is that it helps the punch to remain in a centered state throughout the entire extrusion and core ejection process.

[0023] Another aspect of this application provides a blank for use in the thin-walled high-cylinder forming apparatus provided in this application, wherein a centering positioning groove is formed on one end face of the blank, the centering positioning groove being used to cooperate with the end of the lower punch.

[0024] The technical solution provided in this application can achieve at least one of the following beneficial effects:

[0025] The thin-walled high-cylinder forming apparatus and blank provided in this application involve placing a first pair of center plates on a flat anvil, placing a lower punch in a first inner hole, placing a die on top of the first pair of center plates, and placing the blank in the cavity so that the blank contacts the tip of the lower punch. An upper punch is placed above the blank, and the upper punch is pressed down to a designated position in the blank. At this time, under the impact of the upper punch, the tip of the lower punch also enters the blank. The die, blank, first pair of center plates, upper punch, and lower punch are raised as a whole, causing the first pair of center plates to... Sufficient space is left below the middle plate, and the upper punch continues to be pressed down to make the punch fall from the first inner hole to below the first pair of middle plates, and the forging is completed. During the stamping process, the billet is squeezed and stretched in the cavity by the inner wall of the cavity, the upper punch and the lower punch, and finally the target thin-walled high cylindrical part is obtained. The thin-walled high cylindrical part forming device provided in this application completes the stretching action at the same time as stamping, without the need for the mandrel stretching step again, which makes the production efficiency higher, and the structure is simple, requiring no large investment, thereby reducing the production cost.

[0026] The additional technical features and advantages of this application will become more apparent from the following description or from practical application. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the specific embodiments of this application, the accompanying drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 A three-dimensional structural schematic diagram of one embodiment of the thin-walled high-cylinder forming apparatus provided in this application;

[0029] Figure 2 A cross-sectional structural schematic diagram of one state of an embodiment of the thin-walled high-cylinder forming apparatus provided in this application;

[0030] Figure 3 A cross-sectional structural schematic diagram of another state of an embodiment of the thin-walled high-cylinder forming apparatus provided in this application;

[0031] Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure at point AA;

[0032] Figure 5 This is a cross-sectional structural schematic diagram of a third state of an embodiment of the thin-walled high-cylinder forming apparatus provided in this application.

[0033] Figure label:

[0034] 01. Punch connecting rod; 02. Upper punch;

[0035] 03. Second center plate; 04. Mold;

[0036] 05. First pair of plates; 06. Missing plate;

[0037] 07. Retrieval port; 08. Lower punch;

[0038] 9. Storage channel; 10. Lower center boss;

[0039] 11. Retrieval channel; 12. Receiving cavity;

[0040] 13. Upper boss of the mold; 14. Lower boss of the mold;

[0041] 100. Blank; 200. Flat anvil;

[0042] 300, target thin-walled high cylindrical parts; 400, punch core. Detailed Implementation

[0043] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0046] like Figures 1 to 5As shown, one aspect of this application provides a thin-walled high-cylinder forming apparatus, including a mold 04, a first centering plate 05, an upper punch 02, and a lower punch 08. A cavity for placing a blank 100 is formed on the mold 04, and a first inner hole is formed on the first centering plate 05. The mold 04 is disposed on the top of the first centering plate 05. The lower punch 08 is clearance-fitted with the first inner hole. The upper punch 02 is disposed above the cavity. The upper punch 02, the cavity, the first inner hole, and the lower punch 08 are all coaxially arranged. The inner diameter of the first inner hole, the diameter of the upper punch 02, and the diameter of the lower punch 08 are all smaller than the inner diameter of the cavity. The upper punch 02 and the lower punch 08 are both used to contact the blank 100 disposed in the cavity.

[0047] The thin-walled high-cylinder forming apparatus provided in this application places the first pair of center plates 05 on the flat anvil 200, places the lower punch 08 in the first inner hole, places the die 04 on top of the first pair of center plates 05, and places the blank 100 in the cavity so that the blank 100 contacts the tip of the lower punch 08. The upper punch 02 is placed above the blank 100, and the upper punch 02 is pressed down to a designated position in the blank 100. At this time, under the impact of the upper punch 02, the tip of the lower punch 08 also enters the blank 100. The die 04, blank 100, first pair of center plates 05, upper punch 02, and lower punch 08 are raised as a whole, leaving sufficient space below the first pair of center plates 05. The upper punch 02 is pressed down further, causing the punch core to fall from the first inner hole to below the first pair of center plates 05, thus completing the forging process. During the stamping process, the blank 100... The blank 100 is stretched and elongated by the inner wall of the cavity, the upper punch 02, and the lower punch 08, ultimately yielding the target thin-walled high cylindrical part 300. The thin-walled high cylindrical part forming device provided in this application completes the elongation action simultaneously with the stamping, eliminating the need for a mandrel lengthening step, resulting in higher production efficiency and a simpler structure, requiring less investment and thus reducing production costs. Simultaneously, the finished product has good inner diameter quality and high material utilization. Furthermore, since both the upper punch 02 and the lower punch 08 are used to contact the blank 100 located within the cavity, the blank 100 flows downwards at one end and upwards at the other during the extrusion process, achieving a better filling effect while preventing the blank 100 from accumulating at the lower end of the mold 04 and flowing out from the bottom. The first inner hole and the lower punch 08 are in clearance fit, allowing the lower punch 08 to pass through smoothly.

[0048] Overall, the thin-walled cylindrical forming apparatus provided in this application can achieve rapid and efficient production of thin-walled cylindrical parts using ordinary forging equipment. It boasts high production efficiency, low mold cost, good forming quality, and high material utilization. It alleviates the technical difficulties of low production efficiency, poor precision, and low material utilization in forming thin-walled cylindrical parts using ordinary forging equipment, or the complex equipment and high cost of specialized extrusion equipment for forming thin-walled cylindrical parts.

[0049] Understandably, to ensure that the top of the lower punch 08 extends out of the first inner hole after being placed in the first center plate 05, the length of the lower punch 08 is greater than the radial length of the first inner hole. To ensure that the target thin-walled cylindrical part 300 can be smoothly removed from the cavity after the forging is completed, the cavity has a small draft angle, and the inner diameter of the bottom of the cavity is the outer diameter of the target thin-walled cylindrical part 300. The diameters of the upper punch 02 and the lower punch 08 should be the forming inner diameter of the target thin-walled cylindrical part 300. Preferably, the top edge of the first inner hole retains an upward-protruding sharp corner to facilitate shearing separation between the punch 400 and the forging body.

[0050] Optionally, the mold 04 includes a mold body and a lower mold boss 14. The lower mold boss 14 is formed at the bottom of the mold body. The first centering plate 05 includes a first body. A centering upper positioning groove is formed on the top surface of the first body. The lower mold boss 14 cooperates with the centering upper positioning groove. The lower mold boss 14 is a circular boss, and the centering upper positioning groove is a circular groove. Both the lower mold boss 14 and the centering upper positioning groove are coaxially arranged with the cavity. In this way, on the one hand, when the mold 04 is placed on the first centering plate 05, the cooperation between the lower boss 14 of the mold and the upper positioning groove of the centering plate can quickly realize the positioning cooperation between the mold 04 and the first centering plate 05, and improve the work efficiency while realizing the centering assembly between the mold 04 and the first centering plate 05. On the other hand, when the lower boss 14 of the mold and the upper positioning groove of the centering plate cooperate, the problem of the mold 04 and the first centering plate 05 moving relative to each other in the horizontal direction is less likely to occur during the pressing of the upper punch 02, thereby improving the stability and reliability during use and increasing the product yield.

[0051] Optionally, the thin-walled high-cylinder forming apparatus provided in this application embodiment further includes a squeegee 06, in which a receiving cavity 12 is formed. The first centering plate 05 is disposed on the top of the squeegee 06, and the first inner hole communicates with the receiving cavity 12. The receiving cavity 12 is used to receive the punch 400. In this way, the squeegee 06 can support the first centering plate 05 and receive and accommodate the upper punch 02, the lower punch 08, and the punch 400 punched from the blank 100 when the upper punch 02 presses down on the blank 100. Of course, several bases distributed at the bottom of the first centering plate 05 can be used for support instead of the squeegee 06.

[0052] Optionally, the receiving cavity 12 includes a receiving channel 09 and a retrieval channel 11. The receiving channel 09 is coaxially arranged with the cavity, and its inner diameter is larger than that of the first inner hole. A retrieval port 07 is formed on the drain plate 06. The length direction of the retrieval channel 11 is perpendicular to the axial direction of the receiving channel 09, and the retrieval channel 11 connects the retrieval port 07 and the receiving channel 09. Thus, because the inner diameter of the receiving channel 09 is larger than that of the first inner hole, the upper punch 02, lower punch 08, and punch core 400 can easily fall into the receiving cavity 12. By providing the retrieval port 07 and the retrieval channel 11, it is convenient for workers to retrieve and recover the fallen upper punch 02, punch core 400, and lower punch 08 through the retrieval port 07 and the retrieval channel 11.

[0053] Optionally, the first centering plate 05 includes a first body and a lower centering boss 10. The lower centering boss 10 is formed at the bottom of the first body, and a positioning groove is formed on the top surface of the drain plate 06. The lower centering boss 10 is used to cooperate with the upper centering positioning groove. Both the lower centering boss 10 and the positioning groove are coaxially arranged with the receiving channel 09. By setting the mutually cooperating lower centering boss 10 and positioning groove, the first centering plate 05 and the drain plate 06 are aligned and assembled, thereby making the first centering plate 05 subject to uniform force, reducing deformation, and improving service life. At the same time, the upper punch 02, punch core 400, and lower punch 08 can be smoothly discharged, and the assembly efficiency between the first centering plate 05 and the drain plate 06 is improved, as well as the stability of the cooperation between the first centering plate 05 and the drain plate 06 is improved.

[0054] Optionally, the cavity includes a molded part receiving section and an overflow prevention section located above the molded part receiving section. That is, the length of the cavity will be slightly greater than the length of the target thin-walled high cylindrical part 300, so as to prevent excess material from overflowing from the top during the molding process.

[0055] Optionally, the thin-walled high-cylinder forming apparatus provided in this application embodiment further includes a second centering plate 03, on which a second inner hole is formed, and a lower centering positioning groove is formed on the bottom surface of the second centering plate 03. The mold 04 includes a mold body and an upper mold boss 13, the upper mold boss 13 being formed on the top of the mold body. The lower centering positioning groove is used to cooperate with the upper mold boss 13, and the second inner hole, the lower centering positioning groove, and the upper mold boss 13 are all coaxially arranged with the cavity. The upper punch 02 is used to be disposed in the second inner hole. In this way, it is convenient for the mold 04 to be aligned and assembled with the second centering plate 03, thereby allowing the upper punch 02 to be aligned and placed on the blank 100.

[0056] Optionally, the thin-walled high-cylinder forming apparatus provided in this application embodiment further includes a punch connecting rod 01 for being disposed on the top of the upper punch 02. The punch connecting rod 01 is coaxially disposed with the upper punch 02. The punch connecting rod 01 is used to contact the hammer anvil. Both the punch connecting rod 01 and the upper punch 02 are used for transitional fit with the second inner hole, and both the punch connecting rod 01 and the upper punch 02 are used for clearance fit with the first inner hole. Making both the punch connecting rod 01 and the upper punch 02 for transitional fit with the second inner hole facilitates complete alignment of the punch connecting rod 01 and the upper punch 02 and prevents them from deviating during the punching process. Making both the punch connecting rod 01 and the upper punch 02 for clearance fit with the first inner hole facilitates the smooth passage of the punch connecting rod 01 and the upper punch 02 through the first inner hole.

[0057] Optionally, the sum of the length of the upper punch 02 and the length of the punch connecting rod 01 is greater than the sum of the length of the cavity and the length of the second inner hole. This helps to keep the upper punch 02 in a centered state throughout the entire extrusion and core 400 extrusion process.

[0058] In this embodiment of the application, preferably, the upper punch 02, the mold 04, the lower punch 08 and the first centering plate 05 are all made of high temperature and wear-resistant materials to extend the mold life.

[0059] Another aspect of this application provides a blank 100, which is applied to the thin-walled high-cylinder forming apparatus provided in the embodiments of this application. A centering positioning groove is formed on one end face of the blank 100, and the centering positioning groove is used to cooperate with the end of the lower punch 08.

[0060] By setting a centering positioning groove on the bottom surface of the blank 100, it is easy for the blank 100 to cooperate with the top of the lower punch 08 and be placed in the center.

[0061] To better illustrate the thin-walled cylindrical forming apparatus and blank 100 provided in this application, in an application example, the specific implementation method of the thin-walled cylindrical forming apparatus (which can also be called a simplified thin-walled cylindrical extrusion forming apparatus) provided in this embodiment is as follows:

[0062] Step 1: Machine-cut a centering and positioning groove at the lower end of the blank 100 to match the upper end face of the lower punch 08, and apply thermal insulation coating.

[0063] Step 2: Preheat the die 04, lower punch 08 and upper punch 02, then place the first pair of center plates 05 on the anvil 200 of the forging equipment, place the lower punch 08 in the second inner hole of the first pair of center plates 05, and then place the die 04 on the first pair of center plates 05.

[0064] Step 3: After coating the billet 100 heated to the predetermined temperature with lubricating coating, place it with the end with the centering positioning groove facing down in the mold 04, so that the centering positioning groove on the billet 100 is placed on the upper end of the lower punch 08.

[0065] Step 4: Place the second pair of center plates 03 on the mold 04;

[0066] Step 5: Place the upper punch 02 onto the blank 100 through the first inner hole of the second centering plate 03;

[0067] Step 6: Place the punch connecting rod 01 on the upper punch 02; the structure at this time is as follows. Figure 2 ;

[0068] Step 7: Press down the punch connecting rod 01 to the designated position; at this time, the structure is as follows. Figure 3 ;

[0069] Step 8: Transfer the first pair of center plates 05 and all the devices above them (including: billet 100, die 04, lower punch 08, second pair of center plates 03, upper punch 02 and punch connecting rod 01) to the slotted plate 06 placed on the anvil 200 of the forging equipment; at this time the structure is as follows Figure 1 , Figure 4 and Figure 5 ;

[0070] Step 9: Continue to press down the punch connecting rod 01. The upper end of the punch connecting rod 01 can be connected to a regular punch, so that the punch core 400 is exposed from the sprue 06, and the forging is completed.

[0071] Step 10: Demold the forging from mold 04. This step is a basic process in this field and will not be described in detail.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A thin-walled high-cylinder forming device, characterized in that, The device includes a die, a first centering plate, an upper punch, and a lower punch. A cavity for placing a blank is formed on the die. A first inner hole is formed on the first centering plate. The die is positioned on top of the first centering plate. The lower punch is clearance-fitted with the first inner hole. The upper punch is positioned above the cavity. The upper punch, the cavity, the first inner hole, and the lower punch are all coaxially arranged. The inner diameter of the first inner hole, the diameter of the upper punch, and the diameter of the lower punch are all smaller than the inner diameter of the cavity. The upper punch and the lower punch are both used to contact the blank disposed within the cavity.

2. The thin-walled high-cylinder forming apparatus according to claim 1, characterized in that, The mold includes a mold body and a lower mold boss. The lower mold boss is formed at the bottom of the mold body. The first centering plate includes a first body. A centering upper positioning groove is formed on the top surface of the first body. The lower mold boss cooperates with the centering upper positioning groove. The lower mold boss is a circular boss, and the centering upper positioning groove is a circular groove. Both the lower mold boss and the centering upper positioning groove are coaxially arranged with the cavity.

3. The thin-walled high-cylinder forming apparatus according to claim 2, characterized in that, It also includes a slug, in which a receiving cavity is formed, a first centering plate is disposed on the top of the slug, a first inner hole is used to communicate with the receiving cavity, and the receiving cavity is used to receive the punch.

4. The thin-walled high-cylinder forming apparatus according to claim 3, characterized in that, The receiving cavity includes a receiving channel and a retrieval channel. The receiving channel is coaxially arranged with the cavity. The inner diameter of the receiving channel is larger than the inner diameter of the first inner hole. A retrieval port is formed on the sluice plate. The length direction of the retrieval channel is perpendicular to the axial direction of the receiving channel. The retrieval channel connects the retrieval port and the receiving channel.

5. The thin-walled high-cylinder forming apparatus according to claim 4, characterized in that, The first centering plate includes a first body and a lower centering boss. The lower centering boss is formed at the bottom of the first body. A positioning groove on the upper surface of the drain plate is formed on the top surface of the drain plate. The lower centering boss is used to cooperate with the upper positioning groove. Both the lower centering boss and the positioning groove on the drain plate are coaxially arranged with the storage channel.

6. The thin-walled high-cylinder forming apparatus according to claim 1, characterized in that, The cavity includes a molded part receiving section and an overflow prevention section located above the molded part receiving section.

7. The thin-walled high-cylinder forming apparatus according to any one of claims 1 to 6, characterized in that, It also includes a second centering plate, on which a second inner hole is formed, and a lower centering positioning groove is formed on the bottom surface of the second centering plate. The mold includes a mold body and an upper mold boss. The upper mold boss is formed on the top of the mold body. The lower centering positioning groove is used to cooperate with the upper mold boss. The second inner hole, the lower centering positioning groove, and the upper mold boss are all used to be coaxially arranged with the cavity. The upper punch is used to be disposed in the second inner hole.

8. The thin-walled high-cylinder forming apparatus according to claim 7, characterized in that, It also includes a punch connecting rod for being disposed on the top of the upper punch, the punch connecting rod being coaxially disposed with the upper punch, the punch connecting rod being used to contact the hammer anvil, the punch connecting rod and the upper punch being used to transition fit with the second inner hole, and the punch connecting rod and the upper punch being used to clearance fit with the first inner hole.

9. The thin-walled high-cylinder forming apparatus according to claim 8, characterized in that, The sum of the length of the upper punch and the length of the punch connecting rod is greater than the sum of the length of the cavity and the length of the second inner hole.

10. A billet, characterized in that, The thin-walled high-cylinder forming apparatus as described in any one of claims 1 to 9 has a centering positioning groove formed on one end face of the blank, the centering positioning groove being used to engage with the end of the lower punch.

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