Three-way flange intermediate body three-way upsetting forming method and mold

Abstract

This invention relates to the field of oil and gas extraction, specifically to a three-way upsetting forming method and mold for a three-way flanged intermediate body, comprising the following steps: heating the billet after blanking, preheating the mold after installation, and three-way upsetting: adjusting the initial positions of the upper punch tip, lower punch tip, and horizontal punch tip in the mold; vertically moving the heated billet into the fixed die core and contacting it with the lower punch tip; closing the movable die assembly; upsetting the first section of the lower punch tip; upsetting the first section of the upper punch tip; upsetting the second section of the lower punch tip; upsetting the second section of the upper punch tip; and upsetting the right-side horizontal punch assembly. This invention achieves the technical advantages of shortening the manufacturing cycle and producing high-quality three-way flanged intermediate body forgings.

Description

Technical Field

[0001] This invention relates to the technical field of oil and gas extraction, and in particular to a three-way upsetting method and mold for a three-way flanged intermediate body. Background Technology

[0002] The three-way flanged intermediate body is mainly used in the field of unconventional oil and gas extraction in the petroleum and petrochemical industry. It is made of high-quality alloy structural steel. During operation, it is affected by factors such as high pump pressure (up to 140MPa) and large displacement, resulting in long continuous working time. Therefore, the requirements for various performance aspects are very strict.

[0003] Currently, this three-way flange is produced using conventional ordinary die forging technology, which has the following drawbacks: there are many processing steps, and manufacturing a single product often requires processes such as billet preparation, pre-forging, final forging, and trimming, resulting in a long processing and manufacturing cycle; ordinary die forging products need to undergo trimming to remove excess flash, which inevitably leads to the exposed end of the forging flow line, reducing the mechanical properties and stress corrosion resistance of the product. Summary of the Invention

[0004] This invention provides a three-way upsetting forming method and mold for a three-way flanged intermediate body, which achieves the technical effect of shortening the manufacturing cycle and improving production efficiency.

[0005] One aspect of this invention provides a three-way upsetting method for a three-way flanged intermediate.

[0006] A method for three-way upsetting and forming of a three-way flanged intermediate body includes the following steps:

[0007] The billet is heated after being cut into blanks;

[0008] Preheat the mold after installation;

[0009] Three-way upsetting: Adjust the initial positions of the upper punch tip, lower punch tip, and horizontal punch tip in the die; move the heated blank vertically into the fixed die core and make contact with the lower punch tip; close the movable die assembly; upsetting the first section of the lower punch tip; upsetting the first section of the upper punch tip; upsetting the second section of the lower punch tip; upsetting the second section of the upper punch tip; upsetting the right horizontal punch assembly.

[0010] Optionally, when adjusting the initial positions of the upper punch tip, lower punch tip, and horizontal punch tip in the mold, the upper punch tip is moved to the final position X mm according to the blank length and the height of the forging square platform; the lower punch tip is moved to the final position X mm; the left horizontal punch assembly is moved to the final position; and the right horizontal punch assembly is moved to the final position Y mm.

[0011] Optionally, the first section of the lower punch tip has an upsetting displacement of X / 2mm, the first section of the upper punch tip has an upsetting displacement of X / 2mm, the second section of the lower punch tip has an upsetting displacement of X / 2mm, and the second section of the upper punch tip has an upsetting displacement of X / 2mm; the right horizontal punch assembly has an upsetting displacement of Ymm for upsetting the blank, thereby causing the right horizontal punch assembly to extrude the blank to the limit position.

[0012] Optionally, the mold can be run under no-load before adjusting its initial position.

[0013] On the other hand, a die for three-way upsetting of a three-way flanged intermediate is provided.

[0014] A die for three-way upsetting of a three-way flanged intermediate body includes a fixed die assembly, a movable die assembly, and a right-side horizontal punch assembly. The fixed die assembly is located below the movable die assembly. The fixed die assembly and the movable die assembly cooperate with each other to open and close the die.

[0015] The fixed die assembly includes a fixed die base and a fixed die core, with the fixed die core installed inside the fixed die base. The movable die assembly includes a movable die base and a movable die core, with the movable die core installed inside the movable die base. The fixed die base is provided with a lower punch tip that penetrates both the fixed die base and the fixed die core. The movable die base is provided with an upper punch tip that penetrates both the movable die base and the movable die core.

[0016] The right horizontal punch assembly is located in the middle of the fixed die holder and the movable die holder. The right horizontal punch assembly includes a horizontal punch tip, which is inserted into the fixed die holder and the movable die holder.

[0017] Optionally, a left horizontal punch assembly is provided on the side of the fixed die holder and the movable die holder away from the tip of the horizontal punch. The left horizontal punch assembly includes a first horizontal connecting rod and a first horizontal intermediate connecting rod threadedly connected to the first horizontal connecting rod. The first horizontal intermediate connecting rod abuts against the sidewall of the fixed die core and the movable die core.

[0018] Optionally, a first receiving groove is provided on the fixed die holder, and the fixed die core is installed in the first receiving groove. The fixed die core and the first receiving groove are in clearance fit. A wedge block mounting groove is provided on the groove wall of the first receiving groove, and a wedge block is inserted into the wedge block mounting groove to fix the fixed die core in the first receiving groove.

[0019] Optionally, a fixed die pad is fixed to the bottom of the fixed die holder, and a second mounting hole is provided on the bottom wall of the first receiving groove. A lower punch guide limit ring is installed in the second mounting hole to guide the tip of the lower punch. Both the tip of the upper punch and the tip of the lower punch are square. A positioning key is installed in the middle of the fixed die pad to position the lower punch guide limit ring.

[0020] Optionally, a second connecting hole is provided in the movable die holder, and an upper punch guide limiting ring is installed in the second connecting hole to guide and limit the tip of the upper punch.

[0021] Optionally, the lower punch guide limiting ring has an outer circle and an inner square structure. Positioning grooves are provided on both sides of the bottom of the lower punch guide limiting ring. Positioning blocks are fixed on the inner wall of the positioning square key and are inserted into the positioning grooves. The upper punch guide limiting ring has an outer cylindrical structure, with symmetrical positioning surfaces on both sides of the lower part. The upper punch guide limiting ring has an inner cylindrical structure, with a round hole in the upper part and a square hole in the lower part.

[0022] Compared with existing technologies, the advantages of this invention are as follows: By using the forming method and mold of this invention to upset the billet, a three-way flange intermediate forging with complex shape and large cross-sectional dimension variations can be produced in a single heat treatment process. This results in severe metal deformation, dense internal structure, continuous flow lines, and significantly improved mechanical properties, meeting the high-pressure, high-volume, and continuous operation requirements of high-oil and gas extraction, thus ensuring production efficiency. This method of manufacturing flange intermediates eliminates the need for edge trimming, improving workpiece production efficiency and shortening production time. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, are not intended to limit the scope of the invention. In the drawings:

[0024] Figure 1 This is an exploded view of the fixed die holder assembly and the movable die holder assembly in this invention;

[0025] Figure 2 This is a schematic cross-sectional view of the entire mold in this invention;

[0026] Figure 3 This is an exploded view of the fixed die assembly in this invention;

[0027] Figure 4 This is a schematic diagram of the lower punch guide and limiting ring in this invention;

[0028] Figure 5 This is an exploded view of the movable die assembly in this invention;

[0029] Figure 6This is a perspective view of the upper punch guide limiting ring in this invention;

[0030] Figure 7 This is a bottom view of the upper punch guide limiting ring in this invention;

[0031] Figure 8 This is a schematic diagram of the structure of the forging after upsetting in this invention.

[0032] Explanation of reference numerals in the attached drawings: 1. Fixed die assembly; 11. Fixed die pad; 111. First mounting hole; 12. Fixed die base; 121. First receiving groove; 122. Second mounting hole; 123. First connecting groove; 124. Wedge block mounting groove; 13. Fixed die core; 131. First cavity; 14. Positioning key; 141. Positioning block; 15. Lower punch guide limit ring; 151. Positioning groove; 16. Guide post; 2. Movable die assembly; 21. Movable die pad; 211. First connecting hole; 22. Movable die base; 221. Second receiving groove; 222. 223 Second connecting hole; 23 Second connecting groove; 23 Movable die core; 231 Second cavity; 232 Countersunk groove; 24 Vertical limiting block; 25 Upper punch guide limiting ring; 3 Forging; 31 Main flange; 32 Small flange; 33 Square platform; 34 Cylindrical body; 4 Lower punch tip; 5 Upper punch tip; 51 Vertical connecting rod; 6 Left horizontal punch assembly; 61 First horizontal connecting rod; 62 First horizontal intermediate connecting rod; 7 Right horizontal punch assembly; 71 Horizontal punch tip; 72 Second horizontal intermediate connecting rod; 73 Second horizontal connecting rod. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and descriptions of this invention are used to explain the invention, but are not intended to limit the invention.

[0034] This invention provides a three-way flanged intermediate forming mold, with reference to... Figure 1 , Figure 2 and Figure 3 The mold includes a fixed die assembly 1 and a movable die assembly 2, with the movable die assembly 2 located above the fixed die assembly 1. The fixed die assembly 1 includes a fixed die pad 11, a fixed die base 12, and a fixed die core 13. The fixed die pad 11 is fixed on a fixed worktable, and the fixed die base 12 is fixedly connected above the fixed die pad 11.

[0035] Both the bottom of the fixed die pad 11 and the fixed die base 12 are provided with first mounting holes 111. A positioning key 14 is installed in the first mounting hole 111. The positioning key 14 is interference-fitted with the first mounting hole 111, and the top of the positioning key 14 is inserted into the first mounting hole 111 at the bottom of the fixed die base 12.

[0036] The fixed die holder 12 has a first receiving groove 121 inside. The fixed die core 13 is located in the first receiving groove 121 and is clearance-fitted with the first receiving groove 121. Wedge block mounting grooves 124 are provided on the two opposite groove walls of the first receiving groove 121. Wedge blocks are provided in the wedge block mounting grooves 124 to fix the fixed die core 13 into the first receiving groove 121. The fixed die holder 12 and the fixed die core 13 are made of different materials. When the fixed die holder 12 and the fixed die core 13 are heated, the expansion amount of the fixed die core 13 is greater than that of the fixed die holder 12. Therefore, the fixed die holder 12 applies prestress to the fixed die core 13.

[0037] Reference Figure 2 , Figure 3 and Figure 4 A second mounting hole 122 is provided on the bottom wall of the first receiving groove 121. The second mounting hole 122 is a stepped hole, and a lower punch guide limiting ring 15 is installed in the second mounting hole 122. The upper surface of the lower punch guide limiting ring 15 is flush with the bottom of the first receiving groove 121. The bottom of the lower punch guide limiting ring 15 is inserted into the positioning key 14. The lower punch guide limiting ring 15 has an outer circle and an inner square structure. Positioning grooves 151 are provided on both sides of the bottom of the lower punch guide limiting ring 15. A positioning block 141 is fixed on the inner wall of the positioning key 14. The positioning block 141 is inserted into the positioning groove 151, thereby preventing the positioning key 14 from rotating.

[0038] The outer circle and inner square structure of the lower punch guide limiting ring 15 guides the movement of the square lower punch tip 4, ensuring smooth installation and operation, and correct positioning. The fixed die core 13 has a first cavity 131.

[0039] Reference Figure 5 , Figure 6 and Figure 7 The movable die assembly 2 includes a movable die pad 21, a movable die core 23, and a movable die base 22. The movable die base 22 is fixedly connected below the movable die pad 21, and the movable die pad 21 is connected to a movable crossbeam, which is driven by a mold closing cylinder.

[0040] The movable die holder 22 has a second receiving groove 221, and the movable die core 23 is installed in the second receiving groove 221. The two opposite groove walls in the second receiving groove 221 also have wedge block mounting grooves 124. The movable die core 23 is fixed in the second receiving groove 221 by inserting the wedge block into the wedge block mounting groove 124.

[0041] A first connecting hole 211 is provided at the center of the movable die plate 21, and a vertical limiting block 24 is installed in the first connecting hole 211. A second connecting hole 222 is provided at the center of the movable die base 22, and the second connecting hole 222 communicates with the second receiving groove 221. An upper punch guide limiting ring 25 is installed in the second connecting hole 222, the top of the upper punch guide limiting ring 25 contacts the vertical limiting block 24, and the tip 5 of the upper punch passes through the vertical limiting block 24 and the upper punch guide limiting ring 25.

[0042] The upper punch guide limiting ring 25 has a cylindrical upper part and symmetrical positioning surfaces on both sides of the lower part. The inner cylindrical structure of the upper punch guide limiting ring 25 has a round hole in the upper part and a square hole in the lower part. A recess 232 is formed on the side of the movable die core 23 near the upper punch guide limiting ring 25. The symmetrical positioning surface of the upper punch guide limiting ring 25 contacts the side wall of the recess 232, thus preventing the upper punch guide limiting ring 25 from rotating. This structure guides the square upper punch tip 5, ensuring smooth installation and transportation, and correct positioning. A second cavity 231 is formed on the movable die core. The first cavity 131 and the second cavity 231 together form the cavity for the forging 3.

[0043] Reference Figure 1 and Figure 2 Guide posts 16 are fixed at the four corners or two opposite corners of the top of the fixed die holder 12, and guide holes for the guide posts 16 to be inserted into the movable die holder 22. A vertical connecting rod 51 is provided above the tip of the upper punch 5. The tip of the upper punch 5 and the vertical connecting rod 51 form an upper punch tip assembly. The tip of the upper punch 5 is threadedly connected to the vertical connecting rod 51. The upper punch tip assembly participates in the forming process and can also eject the forging 3 from top to bottom after forging. The tip of the upper punch 5 is connected to the upper central cylinder, and the tip of the lower punch 4 is connected to the lower central cylinder. The tip of the lower punch 4 participates in the forming process and can also eject the forging 3 from bottom to top after forging.

[0044] Both ends of the top of the fixed die holder 12 are provided with first connecting grooves 123, which are semi-circular holes. Both ends of the bottom of the movable die holder 22 are provided with second connecting grooves 223, which are also semi-circular holes. The first connecting grooves 123 and the second connecting grooves 223 form a circular hole. A left horizontal punch assembly 6 is provided in one of the circular holes. The left horizontal punch assembly 6 includes a first horizontal connecting rod 61 and a first horizontal intermediate connecting rod 62. The first horizontal intermediate connecting rod 62 is threadedly connected to the first horizontal connecting rod 61. The first horizontal intermediate connecting rod 62 is in contact with the outer walls of both the fixed die core 13 and the movable die core 23. The end of the first horizontal connecting rod 61 away from the first horizontal intermediate connecting rod 62 is connected to a horizontal cylinder. The left horizontal punch assembly 6 does not participate in forming during the horizontal upsetting process, which can balance the horizontal force on the die and avoid uneven loading.

[0045] Another circular hole contains a right-side horizontal punch assembly 7. The right-side horizontal punch assembly 7 includes a horizontal punch tip 71, a second horizontal intermediate connecting rod 72, and a second horizontal connecting rod 73. The horizontal punch tip 71 is threadedly connected to the second horizontal intermediate connecting rod 72. One end of the horizontal punch tip 71 away from the second horizontal intermediate connecting rod 72 is inserted into the movable die core 23 and the fixed die core 13. The second horizontal intermediate connecting rod 72 is threadedly connected to the second horizontal connecting rod 73. The second horizontal connecting rod 73 is connected to another horizontal cylinder.

[0046] Reference Figure 8 The forging 3 consists of a main flange 31, two symmetrical small flanges 32, a square platform 33, and a cylinder 34. Its complex shape and large variations in cross-sectional dimensions result in severe metal deformation and difficult forming. The forming method for this intermediate body is as follows: the left horizontal punch assembly 6 moves to a designated position and stops → the lower punch tip 4 moves upward to upset the blank to half its stroke and stops → the upper punch tip 5 moves downward to upset the blank to half its stroke and stops → the lower punch tip 4 moves upward to upset the blank to its maximum stroke → the upper punch tip 5 moves downward to upset the blank to its maximum stroke → the right horizontal punch assembly 7 moves to a designated position, thus completing the three-way upset of the three-way flanged intermediate body forging. This forming method satisfies the requirements for precise metal volume distribution during forging and improves material flow. Furthermore, it allows for the rational utilization of the forming force of the equipment, achieving large deformation under small loads, thereby ensuring the forming quality of the three-way flanged intermediate body forging.

[0047] This invention also provides a method for three-way upsetting and extrusion forming of a three-way flanged intermediate, comprising the following steps:

[0048] S1. Billet blanking: The billet adopts a Φ120mm diameter round bar. The material of the round bar is alloy structural steel. The length of the billet is calculated based on the volume of forging 3, taking into account the oxidation and burning loss during heating.

[0049] S2. Mold Installation: First, install the lower punch tip 4 and retract it completely below the worktable pad. Then, install the left horizontal punch assembly 6 and the right horizontal punch assembly 7. Both the left and right horizontal punch assemblies 6 and 7 should be retracted to their initial positions to avoid affecting the installation of the fixed die assembly 1 and the movable die assembly 2. After the fixed die assembly 1 is fully installed, fix it on the worktable. After the movable die assembly 2 is fully installed, connect it to the movable crossbeam. During installation, ensure the centering and positioning accuracy.

[0050] S3. Mold preheating: Preheat the mold to not less than 200°C using a bogie furnace or other heating equipment;

[0051] S4. Billet heating: Use medium frequency furnace or resistance furnace to heat the billet to ensure uniform billet temperature. After heating the billet to about 1200℃ and for the required time, it can be taken out of the furnace for forging.

[0052] S5, Three-way upsetting

[0053] S51. Die Debugging: Before the formal forging begins, a no-load test run should be conducted to ensure that the die operation meets the process requirements; before unloading, the initial position of the die should be adjusted.

[0054] Lower punch tip 4: Based on the length of the billet and the height of the forging 3 square platform, the lower punch tip 4 should move upward to a distance of about X mm from the final position. In this embodiment, X=380. The final position is the position after the lower punch tip 4 has squeezed the forging 3 into shape.

[0055] Upper punch tip 5: Lower punch tip 5 should descend to approximately 380mm from the final position;

[0056] Right horizontal punch assembly 7: Moves to a distance of Y mm from the final position, in this embodiment Y=30;

[0057] Left horizontal punch assembly 6: When it moves to the position near the end, during the pressing process of right horizontal punch assembly 7, its pressure increases accordingly and is consistent with that of the right horizontal punch, so as to improve the stress condition of the mold and avoid uneven load.

[0058] S52. After the billet reaches the set temperature, it is taken out of the furnace and prepared for forging.

[0059] S53. Placing the blank: Vertically move the descaled blank into the fixed die core 13 and make it contact the top surface of the tip 4 of the lower punch.

[0060] S54. Movable die assembly 2 closes: The movable crossbeam drives the movable die assembly 2 downward. When it contacts the upper surface of the fixed die assembly 1, it stops moving downward. In order to counteract the reverse force of other die pressing processes, the die closing cylinder should provide a die closing force not less than the maximum reaction force and maintain it until the forging is completed.

[0061] S55, Lower punch tip 4 first stage upsetting: To ensure the uniformity of metal deformation, the upper and lower punches adopt segmented upsetting; the displacement of the lower punch first stage upsetting is about 190mm, and the metal mainly fills the vertical square cavity; this process adopts displacement control, with a control accuracy of ±5mm;

[0062] S56, First stage upsetting of the upper punch tip 5: The displacement of the first stage upsetting of the upper punch tip 5 is about 190mm. At this time, the metal has filled the square cavity and mainly flows to the horizontal right side. This process adopts displacement control with a control accuracy of ±5mm.

[0063] S57, Second stage upsetting of the lower punch tip 4: The displacement of the second stage upsetting of the lower punch tip 4 is about 190mm. The metal flows to the horizontal right side and the radial cavity of the flange. The filled metal shows an upward tilting phenomenon. This process is mainly controlled by displacement and supplemented by pressure restriction.

[0064] S58, Second stage upsetting of the upper punch tip 5: The displacement of the second stage upsetting of the upper punch tip 5 is about 190mm. The metal flows to the horizontal right side and the radial cavity of the flange. This process can improve the upward warping of the metal in the previous step and make its deformation uniform. Similarly, this process is mainly controlled by displacement and supplemented by pressure restriction.

[0065] S59, Right-side horizontal punch upsetting: The right-side horizontal punch upsets the billet to the limit position, with a displacement of about 30mm; to ensure the forming quality of forging 3, this process adopts pressure control.

[0066] Using the forming method and mold of this invention, a three-way flange intermediate forging 3 with complex shape and large cross-sectional size variation can be produced in one process. The metal is severely deformed, the internal structure is dense, the flow lines are continuous, and the mechanical properties are greatly improved, which meets the high-pressure, large-volume and continuous operation requirements of oil and gas extraction and ensures production efficiency.

[0067] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A method for three-way upset extrusion forming of a three-way flanged intermediate body, characterized in that, The forming method uses a forming mold including a fixed die assembly (1), a movable die assembly (2) and a right horizontal punch assembly (7). The fixed die assembly (1) is located below the movable die assembly (2). The fixed die assembly (1) and the movable die assembly (2) cooperate with each other to open and close the mold. The fixed die assembly (1) includes a fixed die base (12) and a fixed die core (13), with the fixed die core (13) installed inside the fixed die base (12). The movable die assembly (2) includes a movable die base (22) and a movable die core (23), with the movable die core (23) installed inside the movable die base (22). The fixed die base (12) is provided with a lower punch tip (4), which penetrates the fixed die base (12) and the fixed die core (13). The movable die base (22) is provided with an upper punch tip (5), which penetrates the movable die base (22) and the movable die core (23). The right horizontal punch assembly (7) is located in the middle of the fixed die holder (12) and the movable die holder (22) on one side. The right horizontal punch assembly (7) includes a horizontal punch tip (71), which can be inserted into the fixed die core (13) and the movable die core (23). The forming method includes the following steps: The billet is heated after being cut into blanks; Preheat the mold after installation; Three-way upsetting: Adjust the initial positions of the upper punch tip (5), lower punch tip (4) and horizontal punch tip (71) in the die; move the heated blank vertically into the fixed die core (13) and make contact with the lower punch tip (4); close the movable die assembly (2); the lower punch tip (4) performs the first stage of upsetting, and the metal mainly fills the vertical square hole cavity; the upper punch tip (5) performs the first stage of upsetting, and the metal has filled the square hole cavity and mainly flows to the horizontal right; the lower punch tip (4) performs the second stage of upsetting, and the metal flows to the horizontal right and the flange radial cavity; the upper punch tip (5) performs the second stage of upsetting, and the metal flows to the horizontal right and the flange radial cavity; the right horizontal punch assembly (7) performs upsetting.

2. The three-way upsetting and extrusion method for a three-way flanged intermediate body according to claim 1, characterized in that, A left horizontal punch assembly (6) is provided on the side of the fixed die holder (12) and the movable die holder (22) away from the tip (71) of the horizontal punch. The left horizontal punch assembly (6) includes a first horizontal connecting rod (61) and a first horizontal intermediate connecting rod (62) threadedly connected to the first horizontal connecting rod (61). The first horizontal intermediate connecting rod (62) abuts against the side wall of the fixed die core (13) and the movable die core (23).

3. The three-way upsetting and extrusion method for a three-way flanged intermediate body according to claim 2, characterized in that, When adjusting the initial positions of the upper punch tip (5), lower punch tip (4) and horizontal punch tip (71) in the mold, the upper punch tip (5) moves to the position X mm according to the length of the blank and the height of the square platform of the forging (3); the lower punch tip (4) moves to the position X mm; the left horizontal punch assembly (6) moves to the position; and the right horizontal punch assembly (7) moves to the position Y mm.

4. The three-way upsetting and extrusion method for a three-way flanged intermediate body according to claim 3, characterized in that, The first stage of upsetting displacement of the lower punch tip (4) is X / 2mm, the first stage of upsetting displacement of the upper punch tip (5) is X / 2mm, the second stage of upsetting displacement of the lower punch tip (4) is X / 2mm, and the second stage of upsetting displacement of the upper punch tip (5) is X / 2mm; the upsetting displacement of the right horizontal punch assembly (7) of the blank is Ymm, so that the right horizontal punch assembly (7) extrudes the blank to the limit position.

5. The three-way upsetting and extrusion method for a three-way flanged intermediate body according to claim 1, characterized in that, Before adjusting the initial position of the mold, conduct a no-load test run on the mold.

6. The three-way upsetting and extrusion method for a three-way flanged intermediate body according to claim 1, characterized in that, A first receiving groove (121) is provided on the fixed die holder (12). The fixed die core (13) is installed in the first receiving groove (121). The fixed die core (13) and the first receiving groove (121) are in clearance fit. A wedge block mounting groove (124) is provided on the groove wall of the first receiving groove (121). A wedge block is inserted into the wedge block mounting groove (124) and the fixed die core (13) is fixed in the first receiving groove (121) by the wedge block.

7. The three-way upsetting and extrusion method for a three-way flanged intermediate body according to claim 1, characterized in that, A fixed die base (12) is fixed at the bottom of a fixed die base (11). A second mounting hole (122) is provided on the bottom wall of the first receiving groove (121). A lower punch guide limit ring (15) that guides the lower punch tip (4) is installed in the second mounting hole (122). Both the upper punch tip (5) and the lower punch tip (4) are square. A positioning key (14) for positioning the lower punch guide limit ring (15) is installed in the middle of the fixed die base (11).

8. The three-way upsetting and extrusion method for a three-way flanged intermediate body according to claim 7, characterized in that, The movable die holder (22) has a second connecting hole (222) and an upper punch guide limiting ring (25) is installed in the second connecting hole (222) to guide and limit the tip (5) of the upper punch.

9. The three-way upsetting and extrusion method for a three-way flanged intermediate body according to claim 8, characterized in that, The lower punch guide limiting ring (15) has an outer circle and an inner square structure. Positioning grooves (151) are provided on both sides of the bottom of the lower punch guide limiting ring (15). Positioning blocks (141) are fixed on the inner wall of the positioning square key. Positioning blocks (141) are inserted into the positioning grooves (151). The upper punch guide limiting ring (25) has a cylindrical upper part and symmetrical positioning surfaces on both sides of the lower part. The upper punch guide limiting ring (25) has a cylindrical inner structure with a round hole in the upper part and a square hole in the lower part.

Images