Forging die for producing marine reducing flange

Abstract

The invention relates to the technical field of forging dies, in particular to a forging die for producing marine reducing flanges, which comprises a fixing plate, a pushing mechanism is arranged at the lower end of the fixing plate, the pushing mechanism comprises a first punch, an extrusion mechanism is arranged at the upper end of the first punch, the extrusion mechanism comprises a die, and a correction mechanism is arranged at one end of the die. The correcting mechanism comprises an arc-shaped plate, and a cleaning mechanism is arranged at one end of the arc-shaped plate and comprises an air inlet pipe. When the pushing mechanism drives the workpiece to move, the correcting mechanism uses a special guide groove to enable an arc-shaped block to center, correct and protect the workpiece, and chippings are prevented from splashing; during forging, the extrusion mechanism extrudes in stages and can automatically limit; after forging is completed, the cleaning mechanism drives a sliding block to move through a hydraulic cylinder, high-pressure gas is sprayed out from small holes of an arc-shaped plate, chippings are cleaned, a punch is cooled, the service life of a die is prolonged, the punching precision is improved, and the production efficiency is improved through the automatic process.

Description

Technical Field

[0001] This invention relates to the field of forging die technology, specifically a forging die for the production of marine reducing flanges. Background Technology

[0002] Marine reducing flange forging equipment is a specialized device for manufacturing marine reducing flanges. A reducing flange is a special connector for connecting pipes of different diameters. Its core feature is a reducing structure with a large diameter at one end and a small diameter at the other. It achieves effective connection under non-standard working conditions through bolt fastening and sealing gaskets. This equipment processes metal raw materials into reducing flanges that meet marine standards through forging processes, including heating, forging, cooling, and straightening, to ensure the strength, sealing performance, and corrosion resistance of the flange.

[0003] In industrial sectors such as shipbuilding, marine reducing flanges are critical connecting components, and their forging quality directly affects the reliability and safety of the ship's piping system. During the forging process, oxide scale and debris are generated on the workpiece surface. These oxide scale and debris are pressed into the surface of the forging during forging, forming pits, depressions, or orange peel-like defects, leading to increased surface roughness. These defects are particularly fatal in precision forgings and may directly lead to product scrap. The high hardness of the oxide scale and debris, through repeated friction within the mold cavity, exacerbates mold wear, causing scratches, cracks, or even peeling on the mold surface. These debris not only reduce forging quality but also splatter during extrusion, posing a safety hazard to operators. Furthermore, they adhere to the surfaces of workpieces and equipment, affecting forging quality and normal equipment operation. After forging, a large amount of debris and impurities remain on the equipment surface. The residual debris also affects equipment heat dissipation, accelerates mold wear, and shortens mold life. In addition, unclean equipment surfaces affect subsequent stamping accuracy, further increasing the defect rate. Summary of the Invention

[0004] To address the problems in the prior art, the present invention provides a forging die for the production of marine reducing flanges.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a forging mold for producing marine reducing flanges, including a fixed plate, wherein a pushing mechanism for pushing the workpiece to be forged is provided at the lower end of the fixed plate, and the pushing mechanism includes a first punch; The upper end of the first punch is provided with an extrusion mechanism for extruding and forming the workpiece, and the extrusion mechanism includes a mold; One end of the mold is provided with a straightening mechanism that centers the position of the workpiece on the first punch, and the straightening mechanism includes an arc plate; One end of the arc-shaped plate is provided with a cleaning mechanism for cleaning up the debris generated during the workpiece forging process, and the cleaning mechanism includes an air inlet pipe.

[0006] Preferably, a base is fixedly connected to the lower end of the fixing plate, and a top plate is fixedly connected to the upper end of the fixing plate.

[0007] Preferably, the pushing mechanism includes a hydraulic cylinder, the lower end of the non-output end of the hydraulic cylinder is fixedly connected to the base, the upper end of the hydraulic cylinder is fixedly connected to the first punch, and a support plate is slidably connected to the surface of the first punch.

[0008] Preferably, the extrusion mechanism includes a fixed block, the upper end of which is fixedly connected to the top plate, the lower end of which is fixedly connected to a spring, and the lower end of which is fixedly connected to a movable block.

[0009] Preferably, the extrusion mechanism further includes a second punch, the lower end of the movable block is fixedly connected to the second punch, the second punch is slidably connected to the mold, and the outer surface of the mold is fixedly connected to the fixed plate.

[0010] Preferably, the upper end of the arc-shaped plate is fixedly connected to the fixed plate, the inner surface of the arc-shaped plate is fixedly connected to the support plate, a first sleeve is fixedly connected inside the arc-shaped plate, a sliding plate is slidably connected inside the first sleeve, a guide groove is provided inside the sliding plate, a rotating pin is slidably connected inside the guide groove, one end of the rotating pin is rotatably connected to the connecting block, one end of the connecting block is fixedly connected to the output end of the hydraulic cylinder, and an arc-shaped block is fixedly connected to one end of the sliding plate.

[0011] Preferably, the cleaning mechanism includes a sliding block, one end of which is fixedly connected to the surface of the output end of the hydraulic cylinder, and a second sleeve is fitted around the sliding block.

[0012] Preferably, the cleaning mechanism further includes an air inlet pipe, one end of the second sleeve is fixedly connected to the air inlet pipe, and one end of the air inlet pipe is fixedly connected to the arc-shaped plate.

[0013] The beneficial effects of this invention are: The forging die for producing marine reducing flanges described in this invention uses a hydraulic cylinder to drive a connecting block and a rotating pin to slide within a guide groove. This allows two arc-shaped blocks to approach the first punch and center the workpiece for correction. The encirclement size is consistent with the first punch, and the blocks also protect and surround the workpiece. This not only ensures precise workpiece positioning and accurate extrusion and forging positions, improving product quality, but also prevents debris from splashing during extrusion, ensuring operator safety, reducing cleaning workload and safety hazards, providing strong support for stable production, and improving the safety and reliability of the production process.

[0014] This invention discloses a forging die for producing marine reducing flanges. In the extrusion mechanism, the cooperation of a spring, a movable block, and a second punch achieves initial extrusion when the first punch lifts the workpiece, removing oxide scale and impurities from the surface of the marine reducing flange workpiece to be forged, thus improving product quality. As the workpiece approaches the die, two arc-shaped blocks move slightly away from the workpiece, allowing oxide scale and other particulate impurities on the workpiece surface to fall onto the support plate in time, preventing them from entering the die. Subsequently, the second punch is limited by a fixed block, and the first punch continues to move, cooperating with the second punch and the die to complete the forging of the marine reducing flange workpiece. This staged extrusion method allows the workpiece to gradually take shape, reducing defects caused by a single, high-pressure extrusion, improving forging quality, effectively increasing production efficiency and product qualification rate, and reducing production costs.

[0015] The present invention discloses a forging die for the production of marine reducing flanges. The cleaning mechanism uses a hydraulic cylinder to drive a sliding block to control the entry and exit of high-pressure gas into and out of the arc plate. After forging, high-pressure gas is blown out of the arc plate to clean the workpiece, the first punch, and the surface of the support plate. The high-pressure gas can not only blow out debris and impurities, keeping the equipment clean and reducing defects caused by impurities, but also has a cooling function, reducing the risk of punch overheating and extending the service life of the die. Moreover, the automated cleaning process does not require additional manual operation, which significantly improves production efficiency, reduces maintenance costs, enables the equipment to operate continuously and stably, and improves overall production efficiency. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the connection structure between the fixing plate and the base; Figure 3 This is a schematic diagram of the connection structure between the movable block and the second punch. Figure 4 This is a schematic diagram of the connection structure between the sliding plate and the first sleeve. Figure 5 This is a schematic diagram of the connection structure between the sliding plate and the arc block; Figure 6 This is a schematic diagram of the connection structure between the support plate and the curved plate; Figure 7 This is a schematic diagram of the connection structure between the sliding block and the second sleeve.

[0018] In the diagram: 100, fixed plate; 101, base; 102, top plate; 200, pushing mechanism; 201, hydraulic cylinder; 202, first punch; 203, support plate; 300, extrusion mechanism; 301, fixed block; 302, spring; 303, movable block; 304, second punch; 305, mold; 400, straightening mechanism; 401, arc plate; 402, first sleeve; 403, sliding plate; 404, guide groove; 405, rotating pin; 406, connecting block; 407, arc block; 500, cleaning mechanism; 501, sliding block; 502, second sleeve; 503, air inlet pipe. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0020] like Figures 1-7 As shown, the forging mold for producing marine reducing flanges according to the present invention includes a fixed plate 100, and a pushing mechanism 200 for pushing the workpiece to be forged is provided at the lower end of the fixed plate 100. The pushing mechanism 200 includes a first punch 202. The upper end of the first punch 202 is provided with an extrusion mechanism 300 for extruding and forming the workpiece, and the extrusion mechanism 300 includes a mold 305; One end of the mold 305 is provided with a straightening mechanism 400 that centers the position of the workpiece on the first punch 202. The straightening mechanism 400 includes an arc plate 401. One end of the arc plate 401 is provided with a cleaning mechanism 500 for cleaning up the debris generated during the workpiece forging process. The cleaning mechanism 500 includes an air inlet pipe 503.

[0021] Specifically, a base 101 is fixedly connected to the lower end of the fixing plate 100, and a top plate 102 is fixedly connected to the upper end of the fixing plate 100.

[0022] Furthermore, the pushing mechanism 200 includes a hydraulic cylinder 201, the lower end of the non-output end of the hydraulic cylinder 201 is fixedly connected to the base 101, the upper end of the hydraulic cylinder 201 is fixedly connected to the first punch 202, and a support plate 203 is slidably connected to the surface of the first punch 202.

[0023] It should be noted that the extrusion mechanism 300 includes a fixed block 301, the upper end of which is fixedly connected to the top plate 102, a spring 302 fixedly connected to the lower end of which, a movable block 303 fixedly connected to the lower end of which, and a second punch 304 fixedly connected to the lower end of which. The second punch 304 is slidably connected to the mold 305, and the outer surface of the mold 305 is fixedly connected to the fixed plate 100. The heated marine reducing flange workpiece is placed on the upper end of the first punch 202, and the hydraulic cylinder 201 is activated to move upward. The upward movement of the hydraulic cylinder 201 will drive the first punch 202 to move upward, and the upward movement of the first punch 202 will drive the workpiece to move upward.

[0024] It is worth mentioning that the upper end of the arc-shaped plate 401 is fixedly connected to the fixed plate 100, the inner surface of the arc-shaped plate 401 is fixedly connected to the support plate 203, a first sleeve 402 is fixedly connected inside the arc-shaped plate 401, a sliding plate 403 is slidably connected inside the first sleeve 402, a guide groove 404 is provided inside the sliding plate 403, a rotating pin 405 is slidably connected inside the guide groove 404, one end of the rotating pin 405 is rotatably connected to the connecting block 406, and one end of the connecting block 406 is fixed to the output end of the hydraulic cylinder 201. The sliding plate 403 is connected to an arc-shaped block 407 at one end. When the hydraulic cylinder 201 moves upward, it will drive the connecting block 406 to move upward. The upward movement of the connecting block 406 will drive the rotating pin 405 to move upward. The upward movement of the rotating pin 405 will slide in the guide groove 404. The guide groove 404 can be divided into three sections, which will be described from bottom to top. The lower section of the guide groove 404 is inclined towards the first punch 202, the middle section of the guide groove 404 is vertically upward, and the upper section of the guide groove 404 is inclined towards the first punch 202 and then vertically upward. The guide groove 404 as a whole is similar to a bracket shape.

[0025] In addition, the sliding of the rotating pin 405 in the guide groove 404 will cause the sliding plate 403 to move closer to the first punch 202. The sliding plate 403 moving closer to the first punch 202 will cause the two arc blocks 407 to move closer to the first punch 202. The two arc blocks 407 moving closer to the first punch 202 will center and correct the workpiece on the first punch 202. The two arc blocks 407 together are the same size as the first punch 202. The two arc blocks 407 can not only center and correct the workpiece, but also protect and surround the workpiece. The two arc blocks 407 protecting and surrounding the workpiece can prevent debris from flying during the extrusion of the workpiece.

[0026] It should be noted that the upward movement of the first punch 202 will cause the workpiece to move upward, which in turn will cause the second punch 304 to move upward. The upward movement of the second punch 304 will cause the movable block 303 to move upward, which will compress the spring 302 and cause it to move upward. The spring 302 has a large elasticity. The upward movement of the first punch 202 will cause the workpiece and the second punch 304 to move upward and compress the spring 302. During this process, the first punch 202 and the second punch 304 will initially compress the workpiece. At this time, the rotating pin 405 is in the middle section of the guide groove 404. During the initial compression process, oxide scale debris will be generated on the surface of the marine reducing flange workpiece to be forged. When the workpiece is about to enter the mold 305, the rotating pin 405 is between the middle and upper sections of the guide groove 404. The first punch 202 continues to move the workpiece upward, which will cause the rotating pin 405 to be in the guide groove 404. The upper section of the first punch 202 slides, and the two arc-shaped blocks 407 at both ends of the first punch 202 will move slightly away from the first punch 202. At this time, the oxide scale debris on the surface of the workpiece will fall onto the support plate 203. The first punch 202 continues to move upward, and the rotating pin 405 will be in the upper vertical section of the guide groove 404. At this time, the workpiece enters the mold 305. The first punch 202 continues to move upward to forge the workpiece. At this time, the second punch 304 drives the movable block 303 to move upward. The movable block 303 will contact the fixed block 301 and be blocked. At this time, the second punch 304 is limited and cannot move upward. The first punch 202 moves upward and, together with the second punch 304 and the mold 305, forges the marine reducing flange workpiece to be processed. At this time, the rotating pin 405 slides in the upper vertical section of the guide groove 404. Specifically, the cleaning mechanism 500 includes a sliding block 501. One end of the sliding block 501 is fixedly connected to the surface of the output end of the hydraulic cylinder 201. A second sleeve 502 is fitted around the sliding block 501. One end of the second sleeve 502 is fixedly connected to the air inlet pipe 503, and one end of the air inlet pipe 503 is fixedly connected to the arc-shaped plate 401. High-pressure gas is introduced into the second sleeve 502. As the hydraulic cylinder 201 moves upward, it also drives the sliding block 501 to move upward. The upward movement of the sliding block 501 blocks the air inlet pipe 503. After the forging of the workpiece is completed, the sliding block 501 moves downward. The downward movement of the sliding block 501 resets it and moves away from the air inlet pipe 503. At this time, the high-pressure gas inside the second sleeve 502 will enter the air inlet pipe 502. 3. Inside, the high-pressure gas inside the air inlet pipe 503 enters the interior of the arc plate 401. The arc plate 401 has several small holes. The high-pressure gas entering the arc plate 401 will be discharged from the small holes inside the arc plate 401. The high-pressure gas discharged from the small holes inside the arc plate 401 will clean the surface of the forged workpiece, the first punch 202 and the support plate 203. The high-pressure gas ejected from the arc plate 401 will blow out the debris and impurities on the surface of the first punch 202 and the support plate 203. The continuous airflow also has a cooling function, reducing the risk of overheating of the first punch 202 and the second punch 304, extending the service life of the mold 305. The smooth surface after cleaning improves the stamping accuracy and reduces the defect rate. At the same time, the automated cleaning process significantly improves production efficiency and reduces maintenance costs.

[0027] Working principle: When using this invention, the heated marine reducing flange workpiece is placed on the upper end of the first punch 202, and the hydraulic cylinder 201 is started to move upward. The upward movement of the hydraulic cylinder 201 will drive the first punch 202 to move upward, and the upward movement of the first punch 202 will drive the workpiece to move upward.

[0028] As the hydraulic cylinder 201 moves upward, it drives the connecting block 406 to move upward. The upward movement of the connecting block 406 drives the rotating pin 405 to move upward. The upward movement of the rotating pin 405 will slide within the guide groove 404. The guide groove 404 can be divided into three sections, which will be described from bottom to top. The lower section of the guide groove 404 is inclined towards the first punch 202, the middle section of the guide groove 404 is vertically upward, and the upper section of the guide groove 404 is inclined towards the first punch 202 and then vertically upward. The guide groove 404 as a whole is similar to a bracket shape.

[0029] The sliding of the rotating pin 405 within the guide groove 404 causes the sliding plate 403 to move closer to the first punch 202. The sliding plate 403 moving closer to the first punch 202 causes the two arc-shaped blocks 407 to move closer to the first punch 202. The two arc-shaped blocks 407 moving closer to the first punch 202 will center and correct the workpiece on the first punch 202. The two arc-shaped blocks 407 together are the same size as the first punch 202. The two arc-shaped blocks 407 can not only center and correct the workpiece, but also protect and surround the workpiece. The two arc-shaped blocks 407 protecting and surrounding the workpiece can prevent debris from flying during the extrusion of the workpiece.

[0030] The upward movement of the first punch 202 causes the workpiece to move upward, which in turn causes the second punch 304 to move upward. The upward movement of the second punch 304 causes the movable block 303 to move upward, which in turn compresses the spring 302, causing it to move upward. The spring 302 has a relatively high elasticity. The upward movement of the first punch 202 causes the workpiece and the second punch 304 to move upward and compress the spring 302. During this process, the first punch 202 and the second punch 304 perform initial compression on the workpiece. At this time, the rotating pin 405 is in the middle section of the guide groove 404. During the initial compression process, oxide scale debris will be generated on the surface of the marine reducing flange workpiece to be forged. When the workpiece is about to enter the mold 305, the rotating pin 405 is between the middle and upper sections of the guide groove 404. The first punch 202 continues to move the workpiece upward, causing the rotating pin 405 to be in the guide groove 404. The upper section slides, and at this time, the two arc-shaped blocks 407 at both ends of the first punch 202 will move slightly away from the first punch 202. At this time, the oxide scale debris on the surface of the workpiece will fall onto the support plate 203. The first punch 202 continues to move upward, and the rotating pin 405 will be in the upper vertical section of the guide groove 404. At this time, the workpiece enters the mold 305. The first punch 202 continues to move upward to forge the workpiece. At this time, the second punch 304 drives the movable block 303 to move upward. The movable block 303 will contact the fixed block 301 and be blocked. At this time, the second punch 304 is limited and cannot move upward. The first punch 202 moves upward and, together with the second punch 304 and the mold 305, forges the marine reducing flange workpiece to be processed. At this time, the rotating pin 405 slides in the upper vertical section of the guide groove 404.

[0031] High-pressure gas is introduced into the second sleeve 502. As the hydraulic cylinder 201 moves upward, it also drives the sliding block 501 upward. The upward movement of the sliding block 501 blocks the air inlet pipe 503. After the forging of the workpiece is completed, the sliding block 501 moves downward and resets, moving away from the air inlet pipe 503. At this time, the high-pressure gas inside the second sleeve 502 enters the air inlet pipe 503, and then enters the arc-shaped plate 401. The arc-shaped plate 401 has several small holes, allowing the high-pressure gas to enter. The high-pressure gas discharged from several small holes inside the arc plate 401 cleans the surface of the forged workpiece, the first punch 202, and the support plate 203. The high-pressure gas ejected from the arc plate 401 blows out debris and impurities from the surface of the first punch 202 and the support plate 203. The continuous airflow also has a cooling function, reducing the risk of overheating of the first punch 202 and the second punch 304, extending the service life of the mold 305. The smooth surface after cleaning improves stamping accuracy and reduces the defect rate. At the same time, the automated cleaning process significantly improves production efficiency and reduces maintenance costs.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A forging die for producing marine reducing flanges, comprising a fixing plate (100), characterized in that: The lower end of the fixed plate (100) is provided with a pushing mechanism (200) for pushing the workpiece to be forged, and the pushing mechanism (200) includes a first punch (202). The upper end of the first punch (202) is provided with an extrusion mechanism (300) for extruding and forming the workpiece, and the extrusion mechanism (300) includes a mold (305). One end of the mold (305) is provided with a straightening mechanism (400) that centers the position of the workpiece on the first punch (202). The straightening mechanism (400) includes an arc plate (401). One end of the arc plate (401) is provided with a cleaning mechanism (500) for cleaning up the debris generated during the workpiece forging process. The cleaning mechanism (500) includes an air inlet pipe (503).

2. The forging die for producing marine reducing flanges according to claim 1, characterized in that: The lower end of the fixing plate (100) is fixedly connected to a base (101), and the upper end of the fixing plate (100) is fixedly connected to a top plate (102).

3. The forging die for producing marine reducing flanges according to claim 1, characterized in that: The pushing mechanism (200) includes a hydraulic cylinder (201), the lower end of the non-output end of the hydraulic cylinder (201) is fixedly connected to the base (101), the upper end of the hydraulic cylinder (201) is fixedly connected to the first punch (202), and a support plate (203) is slidably connected to the surface of the first punch (202).

4. A forging die for producing marine reducing flanges according to claim 3, characterized in that: The extrusion mechanism (300) includes a fixed block (301), the upper end of which is fixedly connected to the top plate (102), the lower end of which is fixedly connected to a spring (302), and the lower end of which is fixedly connected to a movable block (303).

5. A forging die for producing marine reducing flanges according to claim 4, characterized in that: The extrusion mechanism (300) further includes a second punch (304), the lower end of the movable block (303) is fixedly connected to the second punch (304), the second punch (304) is slidably connected to the mold (305), and the outer surface of the mold (305) is fixedly connected to the fixed plate (100).

6. A forging die for producing marine reducing flanges according to claim 5, characterized in that: The upper end of the arc plate (401) is fixedly connected to the fixed plate (100), the inner surface of the arc plate (401) is fixedly connected to the support plate (203), a first sleeve (402) is fixedly connected inside the arc plate (401), a sliding plate (403) is slidably connected inside the first sleeve (402), a guide groove (404) is provided inside the sliding plate (403), a rotating pin (405) is slidably connected inside the guide groove (404), one end of the rotating pin (405) is rotatably connected to the connecting block (406), one end of the connecting block (406) is fixedly connected to the output end of the hydraulic cylinder (201), and an arc block (407) is fixedly connected to one end of the sliding plate (403).

7. A forging die for producing marine reducing flanges according to claim 6, characterized in that: The cleaning mechanism (500) includes a sliding block (501), one end of which is fixedly connected to the surface of the output end of the hydraulic cylinder (201), and a second sleeve (502) is sleeved on the outside of the sliding block (501).

8. A forging die for producing marine reducing flanges according to claim 7, characterized in that: The cleaning mechanism (500) also includes an air inlet pipe (503), one end of the second sleeve (502) is fixedly connected to the air inlet pipe (503), and one end of the air inlet pipe (503) is fixedly connected to the arc plate (401).

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