An installation edge production mold and method for a special-shaped frame

Abstract

This application relates to a production mold and method for irregularly shaped frame mounting edges, belonging to the technical field of forging and hot working. It includes a base, a lower mold, a left mold, a right mold, and an upper mold. The lower mold is disposed on the base. The left and right molds slide horizontally at the ends of the lower mold away from the base. When the left and right molds are closed, the cavity formed matches the shape of the forging. The left and right molds cooperate to forge and shape the shape of the forging. The upper mold slides vertically and has an expanding mold and a shaping mold facing upwards. The expanding mold includes an expanding section and a forming section. The size of the expanding section decreases sequentially away from the forming section. The shape of the forming section matches the inner shape of the forging. The expanding mold forges and shapes the inner shape of the forging. The shaping mold is used to press and shape the upper surface of the forging, thus forming the forging. This application has the effect of reducing the number of forging passes for irregularly shaped frame mounting edges while improving the product qualification rate after die forging.

Description

Technical Field

[0001] This application relates to the technical field of forging hot working, and in particular to a mold and method for producing mounting edges of irregularly shaped frames. Background Technology

[0002] Irregularly shaped frame mounting edges are typical fan-shaped four-sided frame structures. This part has multiple corners and a frame-like structure on all four sides, making it a relatively complex structural component. For a long time, domestic forging manufacturers have used the traditional forging process of upsetting, punching, reaming, marking, single-sided drawing, corner trimming, shaping, die forging, and heat treatment. This process results in numerous forging passes for irregularly shaped frame mounting edges, low production efficiency, high raw material consumption, and irregular die shapes, leading to a low product qualification rate after die forging. Summary of the Invention

[0003] In order to reduce the number of forging passes for irregular frame mounting edges while improving the production efficiency of forgings, this application provides a production mold and method for irregular frame mounting edges.

[0004] Firstly, this application provides a production mold for irregularly shaped frame mounting edges, which adopts the following technical solution:

[0005] A production mold for an irregularly shaped frame includes a base, a lower mold, a left mold, a right mold, and an upper mold. The lower mold is disposed on the base. The left and right molds are slidably disposed at the ends of the lower mold away from the base in a horizontal direction. When the left and right molds are closed, the cavity formed is consistent with the shape of the forging. The upper mold is located on the side of the left and right molds away from the lower mold. The upper mold can slide vertically to fit against the left and right molds.

[0006] The upper die is provided with a hole-expanding die and a forming die at one end facing the lower die. The hole-expanding die includes a hole-expanding section and a forming section. The forming section is located between the upper die and the hole-expanding section. The size of the hole-expanding section decreases sequentially in the direction away from the forming section. The outer shape of the forming section is consistent with the inner shape of the forging. The lower die is provided with a through hole for the hole-expanding die to slide and embed. The forming die is used to press and shape the upper surface of the forging.

[0007] By adopting the above technical solution, the ring blank is placed on the lower die, and the ring blank is forged in multiple directions by the cooperation of the left and right dies, so that the outer shape of the forging is forged and formed. Then, the inner shape of the forging is forged and formed by the sliding of the expanding die. Finally, the upper surface of the forging is pressed and shaped by the forming die, so that the forging is formed. The whole process only requires 1 to 2 forgings to obtain the final forging. Moreover, during the forging process, there is no need to remove the forging from the die, which improves the production efficiency of forging.

[0008] Preferably, the forming mold includes an overall forming mold and a partial forming mold. The overall forming mold is disposed on the upper mold, and the end face of the overall forming mold facing away from the upper mold has the same shape as the upper surface of the forging. The partial forming mold is designed separately from the upper mold, and the end face of the partial forming mold has the same shape as the upper surface of the forging at the corner.

[0009] By adopting the above technical solution, in the actual forging process, the upper surface of the forging is first pressed and formed by the overall forming die. Then, the overall forming die is moved to the outside of the cavity formed by the left and right dies. The operator can observe the forming of the forging with the naked eye. If the forming at the corner of the forging does not achieve the expected effect, the forging needs to be locally pressed and formed by the local forming die, which effectively improves the pass rate of the forging.

[0010] Preferably, the height of the cavity formed when the left and right molds are closed is higher than the height of the forging after it is formed.

[0011] By adopting the above technical solution, during the internal forging process of the forging part using the expanding die, the material used to form the ring blank is less likely to flow in the height direction and overflow the cavity, thus ensuring the reliability of the forging forming.

[0012] Preferably, there is a gap between the inner wall of the fitting through hole and the forming section of the hole-expanding mold.

[0013] By adopting the above technical solution, the gap setting makes it less likely for the expanding mold to collide with the inner wall of the fitting through hole during the process of the expanding mold sliding towards the base, which to a certain extent extends the service life of the expanding mold.

[0014] Preferably, a control block is slidably connected to the lower mold, and the control block is slidably disposed in the fitting through hole. A cutting block is detachably connected to the side of the control block away from the base. The cutting block is used to scrape off the waste material located on the inner wall of the fitting through hole. After the hole-expanding mold slides, it fits against the end face of the control block away from the base. The lower mold is provided with a control elastic element for pushing the control block to slide away from the base.

[0015] By adopting the above technical solution, during the hole enlargement process, the hole enlargement mold can first slide to fit against the end face of the control block away from the base, and then, as the hole enlargement mold slides, the control block slides towards the base; when the hole enlargement mold slides to separate from the control block, the control block can recover under the action of the control elastic element. During the recovery process of the control block, the cutting block can scrape off the waste material attached to the inner wall of the fitting through hole. The sliding of the control block does not require the cooperation of other driving sources, which makes it easy to control the timing of the sliding of the control block.

[0016] Preferably, the control block has two positioning posts on the side opposite to the cutting block, and the two positioning posts are located at both ends of the control block. Positioning grooves are symmetrically opened on both sides of the positioning posts. The inner wall of the fitting through hole is provided with a positioning slider corresponding to the positioning groove, and the positioning slider is slidably disposed in the positioning groove.

[0017] By adopting the above technical solution, the stability of the control block sliding within the fitting through hole is effectively improved through the cooperation of the positioning slider and the positioning groove.

[0018] Preferably, a locking block is slidably connected to the lower mold, and a locking groove is provided on the lower mold for the locking block to slide. The left mold and the right mold are provided with fitting grooves for the locking block to be inserted after sliding. When the left mold and the right mold are closed, the fitting grooves are connected to the corresponding locking grooves.

[0019] The lower mold is slidably connected to a control slider. The lower mold has a control groove for the control slider to slide. The two ends of the control groove are connected to a locking groove and a fitting through hole, respectively. The locking block has a locking inclined surface at one end near the base. The control slider has a mating inclined surface at one end that cooperates with the locking inclined surface. The control slider has a control sliding inclined surface at the other end. The control block cooperates with the control sliding inclined surface to push the control slider to slide into the locking groove. When the control slider slides into the locking groove, it can push the locking block to slide into the fitting groove with the cooperation of the locking inclined surface and the mating inclined surface. The lower mold has a control sliding elastic element for pushing the control slider to slide into the fitting through hole. The lower mold has a locking elastic element for pushing the locking block to slide into the base.

[0020] By adopting the above technical solution, during the hole expansion stage, the left and right dies will bear greater pressure from the ring billet. The locking block provides support for the left and right dies, making it less likely for the left and right dies to slip relative to the lower die during the hole expansion stage, thus improving the quality of the forgings produced. Furthermore, the slippage of the locking block can be driven by the slippage of the control block without the need for other driving sources, making it easier to control the timing of the locking block's slippage.

[0021] Preferably, the positioning post is further provided with limiting blocks on both sides corresponding to the positioning slider. The limiting blocks are located on the side of the positioning slider facing the base. When the cutting block is aligned with the side of the lower mold away from the base under the action of the control elastic element, the limiting blocks are in contact with the positioning slider.

[0022] By adopting the above technical solution, the setting of the limiting block limits the position of the control spring, making it difficult for the control spring to come into contact with other parts. On the other hand, it limits the sliding length of the control block, making it difficult for the cutting block to affect the multi-directional forging of the ring blank.

[0023] Secondly, this application provides a method for forging irregular frame mounting edges using the aforementioned irregular frame mounting edge production mold, comprising the following steps:

[0024] S1. Blanking: The ring blank for forging is placed on the lower die, and the fitting through hole of the lower die is located between the central holes of the ring blank.

[0025] S2, Multi-directional forging: The left and right dies move toward the ring blank until the left and right dies close, and the shape of the forging is forged and formed;

[0026] S3. Hole enlargement: Keeping the left and right molds closed, the upper mold moves toward the base until the forming section of the hole enlargement mold fits against the inner wall of the forging, and the inner shape of the forging is formed by forging.

[0027] S4. Shaping: Keep the left and right molds closed, and the forming section of the expanding mold is in contact with the inner wall of the forging. Control the shaping mold to move to press and shape the upper surface of the forging, and the forging is formed.

[0028] By adopting the above technical solution, the final forging can be obtained in only 1 to 2 firings during the forming process of irregular frame mounting edges. Moreover, during the forging process, there is no need to remove the forging from the mold, which improves the production efficiency of forging.

[0029] Preferably, the multi-directional forging stage forming die is located inside the cavity formed by the closing of the left and right dies, and the hole-expanding stage forming die is located outside the cavity formed by the closing of the left and right dies.

[0030] By adopting the above technical solution, the forming die in the multi-directional forging stage is located inside the cavity formed by the closed left and right dies, which can effectively prevent abnormal back-height of the ring billet during the multi-directional forging process; the forming die in the hole expansion stage is located outside the cavity formed by the closed left and right dies, which can effectively prevent excessive pressure on the forming die caused by material back-height due to large differences in wall thickness of different parts of the forging during the hole expansion process, thus effectively ensuring the service life of the die.

[0031] In summary, this application includes at least one of the following beneficial technical effects:

[0032] 1. The ring blank is placed on the lower die, and the ring blank is forged in multiple directions by the cooperation of the left and right dies to form the outer shape of the forging. Then, the inner shape of the forging is forged by the sliding of the expanding die. Finally, the upper surface of the forging is pressed and shaped by the forming die to form the forging. The whole process only requires 1 to 2 heats to obtain the final forging. Moreover, during the forging process, there is no need to remove the forging from the die, which improves the production efficiency of forging.

[0033] 2. In the actual forging process, the upper surface of the forging is first pressed and shaped as a whole using an integral forming die. Then, the integral forming die is moved to the outside of the cavity formed by the closing of the left and right dies. The operator can observe the forming of the forging with the naked eye. If the forming at the corner of the forging does not achieve the expected effect, the forging needs to be locally pressed and shaped using a local forming die, which effectively improves the pass rate of the forging. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure after hole enlargement in Embodiment 1 of this application.

[0035] Figure 2 This is a schematic diagram of the split structure of Embodiment 1 of this application.

[0036] Figure 3 This is a schematic diagram of the structure after multi-directional forging in Embodiment 1 of this application.

[0037] Figure 4 This is a flowchart from Embodiment 1 of this application.

[0038] Figure 5 This is a schematic diagram of the overall structure after hole enlargement in Embodiment 2 of this application.

[0039] Figure 6 This is a schematic diagram of the structure after multi-directional forging in Embodiment 2 of this application.

[0040] Explanation of reference numerals in the attached drawings: 1. Base; 2. Lower mold; 21. Fitting through hole; 22. Positioning slider; 23. Locking block; 231. Locking groove; 232. Locking slope; 233. Locking spring; 24. Control slider; 241. Control groove; 242. Fitting slope; 243. Control slope; 244. Control spring; 3. Left mold; 31. Fitting groove; 4. Right mold; 41. Cavity; 5. Upper mold; 51. Hole-expanding mold; 511. Hole-expanding section; 512. Forming section; 6. Shaping mold; 61. Overall shaping mold; 62. Partial shaping mold; 7. Control block; 71. Cutting block; 711. Control groove; 712. Guide arc surface; 72. Positioning post; 721. Positioning groove; 722. Control spring; 73. Limiting block. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0042] Example 1: This application discloses a production mold for mounting edges of irregularly shaped frames, referring to... Figure 1 , Figure 2 and Figure 3The forging includes a base 1, a lower die 2, a left die 3, a right die 4, and an upper die 5. The lower die 2 is fixed on the base 1. In actual use, the base 1 is fixed on the worktable. The lower die 2 is fixed to the base 1 by bolts. The left die 3 and the right die 4 are slidably set at the end of the lower die 2 away from the base 1 in the horizontal direction. A side-sliding cylinder for controlling the sliding of the left die 3 and the right die 4 is fixed on the worktable. The piston rod of the cylinder is fixed to the corresponding left die 3 or right die 4. When the left die 3 and the right die 4 move to the closed state, the cavity 41 formed is consistent with the shape of the forging. Through the sliding of the left die 3 and the right die 4, the ring blank placed on the lower die 2 can be forged in multiple directions, so that the shape of the forging is forged and formed.

[0043] Reference Figure 1 and Figure 2 The upper mold 5 is located on the side opposite to the lower mold 2, opposite to the left mold 3 and right mold 4. The upper mold 5 can slide vertically along the lower mold 2 to fit against the left mold 3 and right mold 4. A control cylinder is provided on the worktable to control the vertical sliding of the upper mold 5. A bracket is provided on the worktable to support the control cylinder. The piston rod of the control cylinder is fixed to the side of the upper mold 5 opposite to the lower mold 2. A reaming mold 51 is provided at the end of the upper mold 5 facing the lower mold 2. The reaming mold 51 is slidably connected to the upper mold 5. A reaming cylinder is provided on the bracket to control the sliding of the reaming mold 51. The piston rod of the reaming cylinder is fixed to the control rod of the reaming mold 51.

[0044] Reference Figure 2 and Figure 3 The expanding die 51 includes an expanding section 511 and a forming section 512. The forming section 512 is located between the upper die 5 and the expanding section 511. The size of the expanding section 511 decreases sequentially in the direction away from the forming section 512. The outer shape of the forming section 512 is consistent with the inner shape of the forging. The size of the expanding section 511 can be adjusted according to the size of the inner shape of the forging to prevent the ring blank from moving towards the base 1 under the action of the expanding section 511 during the expanding stage and forming a longitudinal flash. The existence of the longitudinal flash not only affects the forming of the forging, but also comes into contact with the expanding die 51 in subsequent use, affecting the service life of the expanding die 51. The lower die 2 has a through hole 21 for the expansion die 51 to slide into after it is inserted. The left die 3 and the right die 4 are kept closed. The upper die 5 is controlled to slide towards the base 1 until the expansion die 51 is inserted into the center hole of the ring blank. When the upper die 5 continues to slide until the forming section 512 of the expansion die 51 is in contact with the inner wall of the center hole of the ring blank, the inner shape of the forging is formed by forging.

[0045] By creating a gap between the inner wall of the fitting through hole 21 and the forming section 512 of the expanding die 51, the expanding die 51 is less likely to collide with the inner wall of the fitting through hole 21 during the sliding process of the expanding die 51 toward the base 1, which to some extent extends the service life of the expanding die 51.

[0046] Reference Figure 1 and Figure 2 The upper die 5 is also provided with a forming die 6 for pressing and shaping the upper surface of the forging at one end facing the lower die 2. The forming die 6 includes an overall forming die 61 and a partial forming die 62. The overall forming die 61 is fixed on the upper die 5. The end face of the overall forming die 61 away from the upper die 5 is consistent with the shape of the upper surface of the forging. The partial forming die 62 is designed separately from the upper die 5. The end face of the partial forming die 62 is consistent with the shape of the upper surface at the corner of the forging.

[0047] In the actual forging process, the upper surface of the forging is first pressed and formed by the integral forming die 61. Then, the upper die 5 is moved by the control cylinder to the outside of the cavity 41 formed by the integral forming die 61 and the left die 3 and the right die 4. At this time, the expanding die 51 is kept in contact with the inner wall of the forming section 512 and the central hole of the ring billet under the action of the expanding die cylinder. The operator can observe the forming of the forging with the naked eye. If the forming at the corner of the forging does not achieve the expected effect, the local forming die 62 is placed in the corresponding position of the cavity 41. Then, the upper die 5 is moved by the control cylinder to the point where the integral forming die 61 contacts the local forming die 62. Thus, the forging can be locally pressed and formed by the local forming die 62, which effectively improves the pass rate of the forging. Compared to the overall forming die 61, the partial forming die 62 reduces the contact area with the upper surface of the forging under the same force, thereby increasing the pressure applied to the upper surface of the forging to a certain extent, which helps to form the upper surface at the corner of the forging.

[0048] By making the openings of the parts of the left mold 3 and the right mold 4 that form the cavity 41 flared, the ring blank is less likely to be folded between the parts of the left mold 3 and the right mold 4 during the forging process of the ring blank by the left mold 3 and the right mold 4.

[0049] This application also discloses a method for forging irregularly shaped frame mounting edges using the aforementioned irregularly shaped frame mounting edge production mold, referring to... Figure 4 This includes the following steps:

[0050] S1. Blanking: The ring blank for forging is placed on the lower die 2 in a centered position. The fitting through hole 21 of the lower die 2 is located between the central holes of the ring blank.

[0051] S2, Multi-directional forging: The left die 3 and the right die 4 move toward the direction of the ring blank until the left die 3 and the right die 4 close, and the shape of the forging is forged and formed;

[0052] S3, Hole Enlargement: Keep the left mold 3 and right mold 4 closed, and move the upper mold 5 toward the base 1 until the forming section 512 of the hole enlargement mold 51 fits against the inner wall of the forging, and the inner shape of the forging is formed by forging.

[0053] S4. Shaping: Keep the left mold 3 and right mold 4 closed, and the forming section 512 of the expanding mold 51 is in contact with the inner wall of the forging. Control the shaping mold 6 to move to press and shape the upper surface of the forging, and the forging is formed.

[0054] By limiting the position of the ring blank, it is easier for the ring blank to enter the cavity 41 formed by the closure of the left die 3 and the right die 4 during the multi-directional forging process. In order to make the forging better formed, the selection of the ring blank is also very important. While keeping the outer diameter of the ring blank unchanged, the inner diameter of the ring blank and the height of the ring blank can be appropriately reduced, thereby increasing the wall thickness of the ring blank. This makes the wall thickness of the ring blank basically match the wall thickness of the forging at the non-corner points. On the one hand, it can solve the problem of ring blank folding caused by the large difference in wall thickness due to the small radius at the corners. On the other hand, it can effectively prevent the phenomenon of local excessive height caused by uneven material flow during the hole expansion stage, which facilitates the forming of the forging.

[0055] Reference Figure 1 When the left mold 3 and the right mold 4 are in the closed state, the height of the cavity 41 formed must be higher than the height of the forging after forming. Therefore, during the hole expansion stage, the material used to form the ring blank is not easy to flow in the height direction to overflow the cavity 41, thus ensuring the reliability of the forging forming.

[0056] Before the multi-directional forging stage, the upper die 5 must be moved until the integral forming die 61 is 5-15 mm above the ring blank to prevent abnormal back-height of the ring blank during the multi-directional forging process. When the left die 3 and right die 4 are in the closed state, the integral forming die 61 is located in the cavity 41 formed by the closed left die 3 and right die 4. Before the hole expansion stage, the upper die 5 must be moved until the integral forming die 61 is located outside the cavity 41 formed by the closed left die 3 and right die 4 to prevent excessive pressure on the forming die 6 due to material back-height caused by large differences in wall thickness of different parts of the forging during the hole expansion process, thus effectively ensuring the service life of the die.

[0057] In the forming stage, the upper surface of the forging is first formed by the overall forming mold 61. Then, the upper mold 5 is moved until the overall forming mold 61 exits the cavity 41. The operator can then visually judge the forming condition of the forging. If the forming at the corner of the forging does not achieve the expected effect, the local forming mold 62 is placed in the corresponding position of the cavity 41 to locally form the area with large wall thickness difference at the corner of the forging, thus obtaining the final forging. With the production mold and method in this application, the final forging can be obtained in only 1 to 2 firings. Moreover, during the forging forming process, there is no need to remove the forging from the mold, which improves the production efficiency of forging.

[0058] After forging is formed, it still needs to undergo heat treatment. However, since heat treatment is usually carried out in a special heat treatment equipment or heat treatment workshop, rather than in the production mold, this step is not included in the above method. Heat treatment can eliminate metal defects generated during the forging process, such as cracks, overstretching, internal porosity, etc., and improve the overall quality of the forging.

[0059] Example 2 differs from Example 1 in that, referring to... Figure 5 and Figure 6 A control block 7 is slidably connected to the lower mold 2. The control block 7 is slidably set in the fitting through hole 21. The outer wall of the control block 7 is in contact with the inner wall of the fitting through hole 21. A cutting block 71 is detachably connected to the side of the control block 7 away from the base 1. The cutting block 71 is used to scrape off the waste material located on the inner wall of the fitting through hole 21. The control block 7 is provided with a control groove 711 for the cutting block 71 to fit into. The cutting block 71 can be fixed to the control block 7 with bolts. The control block 7 needs to be provided with a control countersunk hole for the bolt head to fit into.

[0060] Reference Figure 5 and Figure 6 Two positioning posts 72 are fixed on the side of the control block 7 away from the cutting block 71. The two positioning posts 72 are respectively set at both ends of the control block 7. The positioning posts 72 can be fixed to the control block 7 by welding or threaded connection. Positioning grooves 721 are symmetrically opened on both sides of the positioning posts 72. The positioning grooves 721 are set along the length direction of the positioning posts 72. The inner wall of the fitting through hole 21 is provided with a positioning slider 22 corresponding to the positioning groove 721. The positioning slider 22 is welded and fixed to the inner wall of the fitting through hole 21. The positioning slider 22 is slidably set in the positioning groove 721. Through the cooperation of the positioning slider 22 and the positioning groove 721, the stability of the control block 7 sliding in the fitting through hole 21 is effectively improved.

[0061] Reference Figure 5 and Figure 6 The cutting block 71 has a guide arc surface 712 on the side opposite to the fitting through hole 21. By setting the guide arc surface 712, the cutting block 71 can provide positioning of the direction of the waste falling during the scraping process of the waste, which facilitates the collection of waste.

[0062] Reference Figure 5 and Figure 6The lower mold 2 is provided with a control elastic element for pushing the control block 7 to slide away from the base 1. In this embodiment, the control elastic element is a control spring 722. The control spring 722 is sleeved on the positioning post 72. One end of the control spring 722 is attached to the base 1, and the other end of the control spring 722 is fixed to the positioning post 72. During the hole enlargement process, the hole enlargement mold 51 can first slide to be attached to the end face of the control block 7 away from the base 1. Then, as the hole enlargement mold 51 slides, the control block 7 slides towards the base 1. When the hole enlargement mold 51 slides to separate from the control block 7, the control block 7 can slide under the action of the control spring 722 until the cutting block 71 is flush with the lower mold 2. During this process, the cutting block 71 can scrape off the waste material attached to the inner wall of the fitting through hole 21. The sliding of the control block 7 does not require the cooperation of other driving sources, which makes it easy to control the timing of the sliding of the control block 7.

[0063] Reference Figure 5 and Figure 6 A locking block 23 is slidably connected to the lower mold 2. The locking block 23 slides vertically. The lower mold 2 has a locking groove 231 for the locking block 23 to slide. The left mold 3 and the right mold 4 have fitting grooves 31 for the locking block 23 to be inserted after sliding. When the left mold 3 and the right mold 4 are closed, the fitting grooves 31 are connected to the corresponding locking grooves 231. When the locking block 23 is inserted into the fitting grooves 31, it can lock the sliding of the left mold 3 and the right mold 4 relative to the base 1.

[0064] Reference Figure 5 and Figure 6 A control slider 24 is slidably connected to the lower mold 2. The control slider 24 slides horizontally. The lower mold 2 has a control groove 241 for the control slider 24 to slide. The two ends of the control groove 241 are connected to the locking groove 231 and the fitting through hole 21, respectively. The locking block 23 has a locking inclined surface 232 at one end near the base 1. One end of the control slider 24 has a mating inclined surface 242 that cooperates with the locking inclined surface 232. The other end of the control slider 24 has a control inclined surface 243. The control block 7 cooperates with the control inclined surface 243 to push the control slider 24 toward the locking groove 231. The lower mold 2 is provided with a sliding elastic element for pushing the sliding block 24 toward the fitting through hole 21. In this embodiment, the sliding elastic element is a sliding spring 244, one end of which is fixed to the lower mold 2 and the other end of which is fixed to the sliding block 24. The lower mold 2 is provided with a locking elastic element for pushing the locking block 23 toward the base 1. In this embodiment, the locking elastic element is a locking spring 233, one end of which is fixed to the lower mold 2 and the other end of which is fixed to the locking block 23.

[0065] As the control block 7 slides toward the base 1 under the action of the reaming die 51, the control block 7 can first slide to contact the control sliding inclined surface 243 on the control slide block 24. Then, as the control block 7 slides, the control slide block 24 gradually slides toward the locking groove 231 until the control slide block 24 is completely housed in the control sliding groove 241. During this process, the locking block 23 slides to the embedded fitting groove 31 under the action of the locking inclined surface 232 and the mating inclined surface 242, locking the left die 3 and the right die 4. During the reaming stage, the left die 3 and the right die 4 will bear a large pressure from the ring blank. The setting of the locking block 23 provides support for the left die 3 and the right die 4, making it less likely for the left die 3 and the right die 4 to slide relative to the lower die 2 during the reaming stage, thus improving the quality of the forging.

[0066] Reference Figure 5 and Figure 6 The positioning post 72 also has integrally formed limiting blocks 73 on both sides, corresponding to the positioning slider 22. The limiting blocks 73 can be arranged in a ring. The limiting blocks 73 are located on the side of the positioning slider 22 facing the base 1. The control spring 722 is located between the limiting blocks 73 and the base 1. When the cutting block 71 is aligned with the side of the lower die 2 away from the base 1 under the action of the control elastic element, the limiting blocks 73 are in contact with the positioning slider 22. By setting the limiting blocks 73, on the one hand, the position of the control spring 722 is limited, so that the control spring 722 is not easy to contact other parts. On the other hand, the sliding length of the control block 7 is limited, so that the cutting block 71 is not easy to affect the multi-directional forging of the ring blank.

[0067] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A production mold for irregularly shaped frame mounting edges, characterized in that, The forging includes a base (1), a lower mold (2), a left mold (3), a right mold (4), and an upper mold (5). The lower mold (2) is disposed on the base (1). The left mold (3) and the right mold (4) are slidably disposed at the end of the lower mold (2) away from the base (1) in the horizontal direction. When the left mold (3) and the right mold (4) are closed, the cavity (41) formed is consistent with the shape of the forging. The upper mold (5) is located on the side of the left mold (3) and the right mold (4) away from the lower mold (2). The upper mold (5) can slide in the vertical direction to fit with the left mold (3) and the right mold (4). The upper mold (5) is provided with a hole-expanding mold (51) and a shaping mold (6) at one end facing the lower mold (2). The hole-expanding mold (51) includes a hole-expanding section (511) and a forming section (512). The forming section (512) is located between the upper mold (5) and the hole-expanding section (511). The size of the hole-expanding section (511) decreases sequentially in the direction away from the forming section (512). The outer shape of the forming section (512) is consistent with the inner shape of the forging. The lower mold (2) is provided with a through hole (21) for the hole-expanding mold (51) to slide and embed. The shaping mold (6) is used to press and shape the upper surface of the forging. A control block (7) is slidably connected to the lower mold (2). The control block (7) is slidably disposed in the fitting through hole (21). A cutting block (71) is detachably connected to the side of the control block (7) away from the base (1). The cutting block (71) is used to scrape off the waste material located on the inner wall of the fitting through hole (21). After the hole expansion mold (51) slides, it fits against the end face of the control block (7) away from the base (1). The lower mold (2) is provided with a control elastic element for pushing the control block (7) to slide away from the base (1). A locking block (23) is slidably connected to the lower mold (2). The lower mold (2) has a locking groove (231) for the locking block (23) to slide. The left mold (3) and the right mold (4) have fitting grooves (31) for the locking block (23) to be inserted after sliding. When the left mold (3) and the right mold (4) are closed, the fitting groove (31) is connected to the corresponding locking groove (231). A control slider (24) is slidably connected to the lower mold (2). A control groove (241) for sliding the control slider (24) is provided on the lower mold (2). Both ends of the control groove (241) are connected to a locking groove (231) and a fitting through hole (21), respectively. A locking inclined surface (232) is provided at one end of the locking block (23) near the base (1). One end of the control slider (24) is provided with a mating inclined surface (242) that cooperates with the locking inclined surface (232). The other end of the control slider (24) is provided with a control inclined surface (243). The block (7) cooperates with the sliding ramp (243) to push the sliding block (24) towards the locking groove (231). When the sliding block (24) slides towards the locking groove (231), it can push the locking block (23) towards the fitting groove (31) under the cooperation of the locking ramp (232) and the mating ramp (242). The lower mold (2) is provided with a sliding elastic element for pushing the sliding block (24) towards the fitting through hole (21). The lower mold (2) is provided with a locking elastic element for pushing the locking block (23) towards the base (1). The forming mold (6) includes an overall forming mold (61) and a partial forming mold (62). The overall forming mold (61) is set on the upper mold (5). The end face of the overall forming mold (61) away from the upper mold (5) is consistent with the shape of the upper surface of the forging. The partial forming mold (62) is designed separately from the upper mold (5). The end face of the partial forming mold (62) is consistent with the shape of the upper surface at the corner of the forging.

2. The irregular frame mounting edge production mold according to claim 1, characterized in that, The height of the cavity (41) formed when the left mold (3) and the right mold (4) are closed is higher than the height of the forging after it is formed.

3. The irregular frame mounting edge production mold according to claim 1, characterized in that, There is a gap between the inner wall of the fitting through hole (21) and the forming section (512) of the hole expansion mold (51).

4. The irregular frame mounting edge production mold according to claim 1, characterized in that, The control block (7) has two positioning posts (72) on the side opposite to the cutting block (71). The two positioning posts (72) are located at both ends of the control block (7). Positioning grooves (721) are symmetrically opened on both sides of the positioning posts (72). The inner wall of the fitting through hole (21) is provided with a positioning slider (22) corresponding to the positioning groove (721). The positioning slider (22) is slidably disposed in the positioning groove (721).

5. The irregular frame mounting edge production mold according to claim 4, characterized in that, The positioning post (72) is also provided with limiting blocks (73) on both sides corresponding to the positioning slider (22). The limiting blocks (73) are located on the side of the positioning slider (22) facing the base (1). When the cutting block (71) is aligned with the side of the lower mold (2) away from the base (1) under the action of the control elastic element, the limiting blocks (73) are in contact with the positioning slider (22).

6. A method for forging irregularly shaped frame mounting edges using a production mold for irregularly shaped frame mounting edges according to any one of claims 1-5, characterized in that, Includes the following steps: S1. Blanking: The ring blank for forging is placed on the lower die (2) and the fitting through hole (21) of the lower die (2) is located between the central holes of the ring blank. S2, Multi-directional forging: The left die (3) and right die (4) move toward the ring blank until the left die (3) and right die (4) close, and the shape of the forging is forged and formed; S3, Hole enlargement: Keep the left mold (3) and right mold (4) closed, and move the upper mold (5) toward the base (1) until the forming section (512) of the hole enlargement mold (51) fits against the inner wall of the forging, and the inner shape of the forging is forged and formed. S4. Shaping: Keep the left mold (3) and right mold (4) closed, and the forming section (512) of the hole expansion mold (51) is in contact with the inner wall of the forging. Control the shaping mold (6) to move to press and shape the upper surface of the forging, and the forging is formed.

7. The method for forging the mounting edge of an irregularly shaped frame using a production mold for irregularly shaped frame mounting edges according to claim 6, characterized in that, The multi-directional forging stage forming die (6) is located inside the cavity (41) formed by the left die (3) and the right die (4), while the hole-expanding stage forming die (6) is located outside the cavity (41) formed by the left die (3) and the right die (4).

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