Forged three-way hollow valve body prefabricated part, machining equipment and machining method

Abstract

The invention relates to a forged three-way hollow valve body prefabricated part and machining equipment and method, the valve body prefabricated part comprises a valve body and a flange located at the end of the valve body, three hollow inner holes are formed in the valve body, the three hollow inner holes are non-through holes extending from the three ends to the center of the valve body, and the flange is located in the valve body. The valve body, the flange and the three hollow inner holes are directly formed through integrated forging machining. According to the forming equipment, machining devices in three directions are matched, so that the three-way hollow valve body has an uninterrupted material tissue streamline, the material is more compact under the action of pressure stress, the fatigue life of parts can be prolonged, and the compression resistance and bending and torsion resistance strength of the parts can be improved; and the subsequent three-way inner hole machining procedure is reduced, the influence caused by subsequent heat treatment or machining is avoided, the defects of energy waste and low efficiency caused by step-by-step forging forming and repeated heating are overcome, the production efficiency of the product and the material utilization rate are improved, and the production cost of the product is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to a forged three-way hollow valve body prefabricated component and processing equipment and a processing method. Background Art

[0002] A valve is a device used to control, regulate and guide fluids in a fluid system. There are many types of valves. According to their structural characteristics, uses and working principles, they can be divided into many types, such as stop valves, gate valves, ball valves, butterfly valves, diaphragm valves, plug valves, check valves, pressure reducing valves, safety valves, etc. The three-way flanged and hollow valve body is an indispensable device (component) for high-pressure, heat-resistant and corrosion-resistant pipelines in the current international nuclear power, thermal power, petrochemical, shipbuilding and chemical industries. The valve mainly includes the following key parts: 1. Valve body: As the outer shell of the valve, there is a medium channel inside the valve body, which is usually cylindrical and has equal cross-sections. For valves with larger diameters, a valve seat reduction design may also be used to reduce the size and weight of the parts, while reducing the difficulty of processing the sealing surface. The valve body is usually made of cast iron, cast steel, stainless steel and other materials to ensure its strength and corrosion resistance. 2. Valve cover: The valve cover is used to fix the valve stem and valve disc (or gate) and protect the valve stem and packing from the influence of the external environment. The valve cover and the valve body are usually connected by flanges to ensure the reliability and sealing of the connection. 3. Gate: The gate is the opening and closing part of the valve, and its movement direction is perpendicular to the direction of the fluid. The gate can be parallel or wedge-shaped. The sealing surface of the parallel gate is perpendicular to the axis of the pipeline, while the sealing surface of the wedge-shaped gate is at a certain angle to the vertical center line. The gate controls the flow of the fluid by moving the valve stem up and down. 4. Valve stem: The valve stem is the transmission part connecting the handwheel (or other driving device) and the gate. When the handwheel turns, the valve stem drives the gate to move up and down, thereby opening and closing the valve. The valve stem is usually made of materials such as stainless steel or alloy steel to ensure its strength and corrosion resistance. In addition, the valve may also include a valve seat, a seal, an operating device, and some other parts.

[0003] The valve body has different mechanical production and manufacturing methods according to the different pressure levels, including casting, forging and other methods. The valve body manufactured by traditional processes such as casting or welding has defects, such as not being resistant to high pressure, high temperature, corrosion and fatigue, and cannot meet the needs of modern industry. In the traditional process, the valve body is first made into a casting by casting, and then fine-processed, including surface grinding, sealing surface cutting and hole opening, to make the final product. The cast valve body casting does not have flange holes initially, and holes need to be opened through secondary processing. Previously, measuring equipment was required to determine the position of each flange hole, the angle of adjacent holes and the number. This process was time-consuming and labor-intensive, increasing labor costs and measurement equipment investment, thereby increasing production costs.

[0004] In addition, valve bodies made using casting technology will have defects such as pores, slag inclusions, and cracks. The flammable, explosive, high-temperature, and high-pressure valves used by domestic and foreign petrochemical companies have very strict requirements on the valve body, and the working pressure usually reaches more than 100MPa. Due to the casting defects caused by cast steel and cast iron valves and poor pressure-bearing capacity, cast valve bodies are difficult to meet the needs of the project.

[0005] High-end industries such as petrochemicals, nuclear power, and thermal power have more stringent requirements for valve quality, so forged valves are favored in these fields, and their output and demand are increasing year by year. However, most forged valves in the current domestic market use free forging technology, and multiple machining is required afterwards, resulting in low production efficiency, and machining will destroy the metal fiber streamline, affecting product performance. The existing valve body forging process is complex, with low material utilization and production efficiency, and does not meet energy-saving and environmental protection standards. Traditional die forging methods usually use unidirectional die forging process, including blanking, pre-forging, final forging and trimming steps, in which pre-forging only changes the material properties, and final forging realizes forming under unidirectional force. Due to the limitation of unidirectional die forging, only workpieces with a small deformation ratio can be processed. For forged steel flange valves, due to the hot die forging process, traditionally, manufacturers will forge the valve body and flange separately and then weld them to form a welded structure flange valve. This process reduces the strength of the valve body due to the risk of corrosion in the weld, and increases the non-destructive testing process.

[0006] In summary, the casting and forging process of existing valves is a complicated process. The valves prepared by the casting process cannot meet the high-pressure application scenarios. The traditional forging process cannot directly realize the integrated forging forming of a valve body with a three-way hollow hole and a flange. The processing cost is high, the energy consumption is high, and the raw materials are wasted.

[0007] In view of the above technical problems, the present invention provides a three-way hollow valve body preform formed by forging and a processing device and method thereof. Summary of the invention

[0008] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a forged three-way hollow valve body preform, including a valve body preform body, a flange located at the one-way (or multi-way) end of the valve body, the valve body preform interior has inner holes extending from the three ends of the valve body to the middle of the valve body, the three inner holes are hollow and do not penetrate the valve body, the valve body preform body, the one-way (or multi-way) flange and the three inner holes are directly formed by integrated processing through forging equipment.

[0009] An integrated processing equipment for processing the forged three-way hollow valve body prefabricated part comprises a left pier extrusion cylinder, a left pier extrusion flange, a left punching cylinder, a left punching device, a right pier extrusion cylinder, a right pier extrusion flange, a right punching cylinder, a right punching device, a rear pier extrusion cylinder, a rear pier extrusion flange, a rear punching cylinder and a rear punching device.

[0010] A processing technology for processing the forged three-way hollow valve body prefabricated part comprises the following steps: (1) Preheat the left pier extruded flange, left punching device, right pier extruded flange, right punching device, rear pier extruded flange and rear punching device to 280-350°C; (2) Spray the left pier extrusion flange, the left punching device, the right pier extrusion flange, the right punching device, the rear pier extrusion flange and the rear punching device with water-based graphite paint; (3) The die is pulled out from the fixed middle beam of the frame fuselage through the die pulling device, and then the upper die is lifted through the die opening device. The operating speed of the die pulling device is 50-200 mm / s; (4) placing the round bar blank into a heating furnace and heating it to 1200°C, and placing the heated round bar blank into a mold; (5) The upper mold is lowered through the mold opening device, and the mold pulling device sends the mold into the internal pressing station of the fixed middle beam of the frame fuselage. The operating speed of the mold pulling device is 50-200mm / s; (6) The mold is sealed by a gate device, and the downward speed of the gate device is 10-100 mm / s; (7) The left pier extrusion flange, the left punching device, the right pier extrusion flange, the right punching device, the rear pier extrusion flange and the rear punching device are driven to the material receiving position by the left pier extrusion cylinder, the left punching cylinder, the right pier extrusion cylinder, the right punching cylinder, the rear pier extrusion cylinder and the rear punching cylinder respectively, and the running speed is 10-100mm / s; (8) The rear extrusion cylinder drives the rear extrusion flange to extrude the round rod-shaped blank; (9) The rear punching cylinder drives the rear punching device to punch the round rod-shaped blank; (10) The left punching cylinder drives the left punching device, and the right punching cylinder drives the right punching device, punching both ends of the round rod-shaped blank at the same time; (11) The left extrusion cylinder drives the left extrusion flange, and the right extrusion cylinder drives the right extrusion flange, and the two ends of the round rod-shaped billet are extruded at the same time; (12) The left pier extrusion flange, the left punching device, the right pier extrusion flange, the right punching device, the rear pier extrusion flange and the rear punching device are driven out of the die by the left pier extrusion cylinder, the left punching cylinder, the right pier extrusion cylinder, the right punching cylinder, the rear pier extrusion cylinder and the rear punching cylinder respectively, and the three-way hollow valve body forging prefabricated part is formed in an integrated manner; (13) The gate device moves upward and returns to its original position; (14) The die is pulled out from the fixed middle beam of the frame fuselage by the die pulling device, and then the upper die is lifted by the die opening device. The operating speed of the die pulling device is 50-200 mm / s; (15) Take out the three-way hollow valve body forging prefabricated part; The above forming process is completed; multiple forgings are completed through cyclic operations.

[0011] The advantages and positive effects of the present invention are: 1. The forged three-way hollow valve body prefabricated part of the present invention uses heated rod material as blank and forges the three-way hollow valve body in one step. The forged three-way hollow valve body has the characteristics of good mechanical properties and small processing allowance, which can greatly reduce the cost of raw materials. At the same time, this forging process makes the three-way hollow valve body have uninterrupted material organization streamlines, makes the material more dense under the action of compressive stress, avoids defects such as pores, slag inclusions, cracks, etc. in the valve body prepared by casting process, and can improve the fatigue life, compressive and bending-torsion strength of parts, and has high pressure-bearing capacity. The processing structure is mature, the operation precision is high, the failure rate is low, and the adjustment is simple.

[0012] 2. The processing method of the forged three-way hollow valve body preform of the present invention, wherein the processing equipment cooperates with the processing devices in three directions, namely, through the left pier extrusion cylinder, the left pier extrusion flange, the left punching cylinder, the left punching device, the right pier extrusion cylinder, the right pier extrusion flange, the right punching cylinder, the right punching device, the rear pier extrusion cylinder, the rear pier extrusion flange, the rear punching cylinder, the rear punching device, through multi-directional force processing in multiple directions at the same time, the three-way end flanges and three inner holes and the outer shape of the three-way hollow valve body preform can be formed at one time, and no subsequent lathe, welding and other complicated processing procedures are required. The use of such a composite forming process avoids the energy waste and low efficiency of the previous step-by-step forging and multiple heating defects, reduces the processing procedures of the three inner holes, improves the production efficiency of the product, and at the same time improves the utilization rate of materials and reduces the production cost of the product. The processing equipment in the present invention adopts a closed mold, which is in a closed environment during the processing process, which greatly avoids material flash during processing.

[0013] 3. The forged three-way hollow valve body preform obtained by the present invention adds raw materials to the mold in a quantitative manner according to the processing size. Through high-efficiency processing in three directions, the three hollow inner holes extending from the three ends to the middle area complete most of the inner hole processing process during the forging process, and only a small part of the remaining material is not penetrated, and it can be pierced through by simple traditional processes later. The processing amount of the three-way inner hole in subsequent processing and manufacturing is greatly reduced, and the influence caused by heat treatment or machining is avoided. Compared with the inner hole obtained by the processing method of traditional solid structure forging parts through lathes, punching machines, milling machines, etc., the waste of raw materials in the perforation process is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional view of a prefabricated valve body of a three-way hollow valve with a single flange of the present invention; Figure 2 A three-dimensional diagram of a prefabricated valve body of a three-way hollow valve with a single flange according to the present invention; Figure 3It is a cross-sectional view of a prefabricated valve body of a three-way hollow valve with double flanges of the present invention; Figure 4 A three-dimensional diagram of a prefabricated valve body of a three-way hollow valve with double flanges according to the present invention; Figure 5 It is a cross-sectional view of a prefabricated valve body of a three-way hollow valve with three flanges of the present invention; Figure 6 A three-dimensional diagram of a prefabricated valve body of a three-way hollow valve with three flanges according to the present invention; Figure 7 It is a cross-sectional view of a valve body of a three-way hollow valve with a single flange of the present invention; Figure 8 It is a cross-sectional view of different barrier wall structures of a three-way hollow valve body prefabricated part with a single flange of the present invention; Fig. 9 A three-dimensional diagram of the integrated forming equipment for forging preforms of three-way hollow valve bodies of the present invention; Fig.10 It is a front view of the integrated forming equipment for forging preforms of three-way hollow valve bodies of the present invention; Fig.11 for Fig.10 AA's cross-section; Fig.12 for Fig.10 Cross-section of BB; In the figure: 1A-valve body prefabricated part, 1B-flange, 1C1-first inner hole, 1C2-second inner hole, 1C3-third inner hole, 1D1-first wall, 1D2-second wall, 1D3-blocking wall, 2A-double flange valve body prefabricated part, 2B1-right flange 1, 2B2-left flange 1, 3A-triple flange valve body prefabricated part, 3B1-top flange, 3B2-right flange 2, 3B3-left flange 2; 1-frame body, 2-left pier extrusion cylinder, 3-left pier extrusion flange, 4-left punching device, 5-rear pier extrusion cylinder, 6-rear pier extrusion flange, 7-rear punching device, 8-gate device, 8-1 gate cylinder, 8-2 gate, 8-3 U-shaped groove, 9-die opening device, 9-1 die opening cylinder, 9-2 guide column, 9-3 die plate, 9-4 die opening convex strip, 10-die drawing device, 10-1 guide rail, 10-2 guide rail convex strip, 10-3 die drawing connector, 10-4 die drawing cylinder, 11-left fixed beam, 12-left movable beam, 13-fixed middle beam, 14-rear fixed beam, 15-rear movable beam, 16-pull rod, 17-left punching cylinder, 18-right pier extrusion cylinder, 19-right punching cylinder, 20-right pier extrusion flange, 21-right punching device, 22-right fixed beam, 23-right movable beam, 24-rear punching cylinder, 25-upper die, 26-lower die, 27-blank. DETAILED DESCRIPTION

[0015] The present invention is further described in detail below through specific examples. The following examples are only illustrative and not restrictive, and the protection scope of the present invention cannot be limited thereto.

[0016] like Figure 1 and Figure 2 As shown, a forged three-way hollow valve body preform comprises a valve body preform body 1A, a flange 1B located at the top end of the valve body preform body 1A, and the valve body preform body 1A has three first inner holes 1C1, second inner holes 1C2, and third inner holes 1C3 extending from the first end, the second end, and the third end of the valve body preform body 1A to the middle of the valve body preform body 1A, respectively. The first inner hole 1C1, the second inner hole 1C2, and the third inner hole 1C3 are not completed. The valve body is fully penetrated, the first wall 1D1 is forged between the first inner hole 1C1 and the second inner hole 1C2, the second wall 1D2 is forged between the first inner hole 1C1 and the third inner hole 1C3, the first inner hole 1C1, the second inner hole 1C2, and the third inner hole 1C3 are not connected to each other, and the valve body preform body 1A, the flange 1B and the first inner hole 1C1, the second inner hole 1C2, the third inner hole 1C3, the first wall 1D1 and the second wall 1D2 are directly formed by forging integrated processing. Through the processing method of the present invention, the pressure bearing capacity of the valve body is large, the excellent performance of the valve body can be used in high-pressure scenarios, and the service life is increased.

[0017] like Figure 3 and Figure 4 As shown, a forged three-way hollow valve body preform with double flanges mainly includes a double flange valve body preform body 2A, a right flange 2B1, a left flange 2B2, and Figure 1 , Figure 2 The difference is that it has two flanges, and the other structures are basically the same.

[0018] like Figure 5 and Figure 6 As shown, a forged three-way hollow valve body preform with three flanges mainly includes a three-flange valve body preform body 3A, a top flange 3B1, a right flange 3B2, a left flange 3B3, and Figure 1 , Figure 2 The difference is that it has three flanges, and the other structures are basically the same.

[0019] Regardless of whether the valve body has one flange, two flanges or three flanges, the valve body preform body, flange and three inner holes of the present invention are directly formed by integrated processing during the forging process. During the processing, the required raw materials are calculated according to the processing size. Preferably, in order to ensure that the forged valve body is dense enough to form a good organizational streamline and avoid defects, the raw materials are added in a surplus manner. Through high-efficiency processing in three directions, the three hollow inner holes extending from the three ends to the middle area complete most of the inner hole processing process during the forging process, and only a small part of the surplus raw materials remain to form an unpenetrated barrier wall between the three inner holes, which can be subsequently pierced through by simple traditional processes, such as punching machines, lathes, milling machines and other processing equipment. Figure 7 As shown, the first wall 1D1 and the second wall 1D2 are removed by machining to form a completely penetrated valve body. This greatly reduces the amount of processing of the three-way inner hole in subsequent processing and manufacturing, avoids the impact of heat treatment or machining, and compared with the method of processing the inner hole in the traditional solid structure forging part, it greatly reduces the waste of raw materials in the perforation process and improves the various performances and processing efficiency of the valve body.

[0020] like Figure 8 As shown, another structure of a forged three-way hollow valve body preform also includes a first inner hole 1C1, a second inner hole 1C2, and a third inner hole 1C3, wherein the first inner hole 1C1, the second inner hole 1C2, and the third inner hole 1C3 do not completely penetrate the valve body, and the first inner hole 1C1, the second inner hole 1C2, and the third inner hole 1C3 form a barrier wall 1D3 between each other, so that the first inner hole 1C1, the second inner hole 1C2, and the third inner hole 1C3 are not connected to each other.

[0021] like Figure 9-12As shown, a three-way hollow valve body forging preform integrated forming equipment includes a frame body 1, a left pier extrusion cylinder 2, a left pier extrusion flange 3, a left punching cylinder 17, a left punching device 4, a right pier extrusion cylinder 18, a right pier extrusion flange 20, a right punching cylinder 19, a right punching device 21, a rear pier extrusion cylinder 5, a rear pier extrusion flange 6, a rear punching cylinder 24, a rear punching device 7, a gate device 8, a die opening device 9, a die drawing device 10 and a die; the left pier extrusion cylinder 2, the left pier extrusion flange 3, the left punching cylinder 17 and the left punching device 4 are symmetrically and coaxially installed with the right pier extrusion cylinder 18, the right pier extrusion flange 20, the right punching cylinder 19 and the right punching device 21; the rear pier extrusion cylinder 5, the rear pier extrusion flange 6, The rear punching cylinder 24 and the rear punching device 7 are coaxially installed; the left end of the frame body 1 is installed with a left extruding cylinder 2, and the left punching cylinder 17 is installed in the left extruding cylinder 2. The left extruding cylinder 2 drives the left extruding flange 3 to extrude, and the left punching cylinder 17 drives the left punching device 4 to punch; the right end of the frame body 1 is installed with a right extruding cylinder 18, and the right punching cylinder 19 is installed in the right extruding cylinder 18. The right extruding cylinder 18 drives the right extruding flange 20 to extrude, and the right punching cylinder 19 drives the right punching device 21 to punch; the rear end of the frame body 1 is installed with a rear extruding cylinder 5, and the rear punching cylinder 24 is installed in the rear extruding cylinder 5. The rear extruding cylinder 5 drives the rear extruding flange 6 to extrude, and the rear punching cylinder 24 drives the rear punching device 7 to punch. The left extrusion cylinder 2, the left punching cylinder 17, the right extrusion cylinder 18, the right punching cylinder 19, the rear extrusion cylinder 5 and the rear punching cylinder 24 all adopt a composite oil cylinder structure, which can be respectively moved to realize the extrusion and punching forming operations, and displacement rulers for extrusion and punching are respectively provided, and combined with the hydraulic system, the tonnage and position can be accurately closed-loop controlled; the left punching device 4, the right punching device 21 and the rear punching device 7 are all provided with circulating cooling water passages inside to realize the punching forming of the three-way hollow valve body prefabricated parts; the left extrusion flange 3, the right extrusion flange 20 and the rear extrusion flange 6 all adopt a hollow flange structure, the inside of which is hollow for the punching rod to pass through, and the outside is used for the extrusion forming of the flange of the three-way hollow valve body prefabricated parts.

[0022] A mold is installed inside the middle end of the frame body 1, and a blank 27 is placed in the mold. A mold opening device 9 is installed above the front end of the middle end of the frame body 1, a die pulling device 10 is installed below the front end of the middle end of the frame body 1, and a gate device 8 is installed at the upper end of the middle end of the frame body 1. The mold is pulled out or pushed in by the die pulling device 10, and opened or closed by the mold opening device 9, and radially limited by the gate device 8.

[0023] The frame fuselage 1 comprises a left fixed beam 11 located at the left end of the frame fuselage 1, a left movable beam 12 connected to the right end of the left fixed beam 11, a fixed middle beam 13 located at the middle end of the frame fuselage 1, a right fixed beam 22 located at the right end of the frame fuselage 1, a right movable beam 23 connected to the left end of the right fixed beam 22, a rear fixed beam 14 located at the rear end of the frame fuselage 1, a rear movable beam 15 connected to the front end of the rear fixed beam 14, and a tie rod 16. The left fixed beam 11, the left movable beam 12, the fixed middle beam 13, the right fixed beam 22, the right movable beam 23, the rear fixed beam 14 and the rear movable beam 15 are all connected by the tie rod 16. The left fixed beam 11 is equipped with a left pier extrusion cylinder 2; the left pier extrusion cylinder 2 installed on the left fixed beam 11 drives the left pier extrusion flange 3 installed at the right end of the left movable beam 12 to pierce, and the left punching cylinder 17 installed in the left pier extrusion cylinder 2 drives The left punching device 4 is driven to punch holes; the right pier extrusion cylinder 18 installed on the right fixed beam 22 drives the right pier extrusion flange 20 installed at the left end of the right movable beam 23 to pierce, and the right punching cylinder 19 installed in the right pier extrusion cylinder 18 drives the right punching device 21 to punch; the rear pier extrusion cylinder 5 installed on the rear fixed beam 14 drives the rear pier extrusion flange 6 installed at the front end of the rear movable beam 15 to pierce, and the rear punching cylinder 24 installed in the rear pier extrusion cylinder 5 drives the rear punching device 7 to punch; a mold is installed inside the fixed middle beam 13, and a blank 27 is placed in the mold, a mold opening device 9 is installed above the front end of the fixed middle beam 13, a die drawing device 10 is installed below the front end of the fixed middle beam 13, and a gate device 8 is installed at the upper end of the fixed middle beam 13, the mold is pulled out or pushed in by the die drawing device 10, and opened or closed by the mold opening device 9, and radially limited by the gate device 8. The left fixed beam 11, the left movable beam 12, the right fixed beam 22, the right movable beam 23, the rear fixed beam 14 and the rear movable beam 15 all adopt plate welding structure, and form an integral force-bearing frame through the tie rod 16 made of high-strength forging material, and all are pre-tightened by prestressed overpressure.

[0024] The die drawing device 10 includes a guide rail 10-1 symmetrically arranged below the front end of the fixed middle beam 13 of the frame fuselage 1, a guide rail convex strip 10-2 is arranged on the outer side of the upper end of the guide rail 10-1, and is movably connected to the grooves at both ends of the lower mold 26 of the mold, and a die drawing connector 10-3 is arranged between the guide rails 10-1, one end of the die drawing connector 10-3 is connected and installed below the front end of the fixed middle beam 13 of the frame fuselage 1, and is located at the lower end of the guide rail 10-1. The other end of the die drawing connector 10-3 is mounted on the lower mold 26 of the mold, and the mold drives the die drawing connector 10-3 through the die drawing cylinder 10-4 to drive the mold to be pulled out or pushed on the guide rail 10-1.

[0025] The gate device 8 includes a gate cylinder 8-1 placed at the upper end of the fixed middle beam 13 of the frame body 1. The gate cylinder 8-1 drives the gate 8-2 to move up and down to radially limit and seal the mold, and can withstand the 2500t force during valve body forming and forging. An inverted U-shaped groove 8-3 is arranged in the middle of the gate 8-2, and the inverted U-shaped groove 8-3 is clamped on the die connector 10-3 of the die device 10.

[0026] The mold opening device 9 includes a mold opening cylinder 9-1 placed above the front end of the fixed middle beam 13 of the frame body 1, guide columns 9-2 are symmetrically arranged at both ends of the mold opening cylinder 9-1, the lower ends of the guide columns 9-2 are connected to an opening mold plate 9-3, and mold opening convex strips 9-4 are symmetrically arranged at both ends of the opening mold plate 9-3, which are movably connected to the grooves at both ends of the upper mold 25 of the mold; the mold opening cylinder 9-1 drives the opening mold plate 9-3 to move up and down to guide the guide column 9-2, driving the upper mold 25 of the mold to open or close, so as to facilitate the removal and placement of the integrated formed workpiece of the three-way hollow valve body forging prefabricated part.

[0027] Working principle of the present invention: The mold opening cylinder 9-1 of the mold opening device 9 drives the mold opening plate 9-3 to move downward, and the mold opening convex strips 9-4 symmetrically arranged at both ends of the mold opening plate 9-3 are moved downward to be parallel to the grooves at both ends of the upper mold 25. The mold drawing cylinder 10-4 of the die drawing device 10 drives the die drawing connector 10-3 to drive the mold to move outward, and the grooves at both ends of the lower mold 26 cooperate with the guide rail convex strips 10-2 of the guide rail 10-1 to pull the mold out. At the same time, the grooves at both ends of the upper mold 25 cooperate with the mold opening convex strips 9-4 of the mold opening device 9. The mold opening cylinder 9-1 of the mold opening device 9 drives the mold opening plate 9-3 to move up to open the upper mold 25, and the blank 27 is placed in the lower mold 26. The mold opening cylinder 9-1 of the mold opening device 9 drives the mold opening plate 9-3 to move down to place the upper mold 25 on the lower mold 26. The mold drawing cylinder 10-4 of the die drawing device 10 drives the die drawing connector 10-3 to move the mold inward, and the mold is sent to the fixed middle beam 13 of the frame fuselage 1. The mold opening convex strip 9-4 of the mold opening device 9 and the upper mold 25 are connected. The grooves at both ends are disengaged, the mold opening cylinder 9-1 of the mold opening device 9 drives the mold opening plate 9-3 to move up and return to its original position, the gate cylinder 8-1 of the gate device 8 drives the gate 8-2 to move down, and the inverted U-shaped groove 8-3 is clamped on the die connection 10-3 of the die drawing device 10 to radially limit the mold, the rear piercing cylinder 5 drives the rear movable beam 15 to drive the rear piercing flange 6 to pierce the blank 27, the rear punching cylinder 24 drives the rear punching device 7 to punch the blank 27, and the left punching cylinder 1 7 and the right punching cylinder 19 respectively drive the left punching device 4 and the right punching device 21 to punch the blank 27, the left piercing cylinder 2 and the right piercing cylinder 18 respectively drive the left piercing flange 3 and the right piercing flange 20 to pierce the blank 27, and the three-way hollow valve body forging preform is integrated and formed, the gate cylinder 8-1 of the gate device 8 drives the gate 8-2 to move upward, the die drawing device 10 pulls out the die, and the die opening device 9 opens the upper die 25 to take out the three-way hollow valve body forging preform workpiece.

[0028] A method for integrated processing of a forged three-way hollow valve body prefabricated part, characterized in that it comprises the following steps: (1) Preheat the left pier extruded flange 3, the left punching device 4, the right pier extruded flange 20, the right punching device 21, the rear pier extruded flange 6 and the rear punching device 7 to 280-350°C; (2) spraying the left pier extrusion flange 3, the left punching device 4, the right pier extrusion flange 20, the right punching device 21, the rear pier extrusion flange 6 and the rear punching device 7 with water-based graphite paint; (3) The die is pulled out from the fixed middle beam 13 of the frame body 1 by the die pulling device 10, and then the upper die 25 is lifted by the die opening device 9. The operating speed of the die pulling device 10 is 50-200 mm / s; (4) placing the round bar blank 27 into a heating furnace and heating it to 1200° C., and placing the heated round bar blank 27 into a mold; (5) The upper mold 25 is lowered by the mold opening device 9, and the mold pulling device 10 sends the mold into the internal pressing station of the fixed middle beam 13 of the frame fuselage 1. The operating speed of the mold pulling device 10 is 50-200 mm / s; (6) The mold is sealed by the gate device 8, and the downward speed of the gate device 8 is 10-100 mm / s; (7) The left pier extrusion flange 3, the left punching device 4, the right pier extrusion flange 20, the right punching device 21, the rear pier extrusion flange 6 and the rear punching device 7 are driven to the material receiving position by the left pier extrusion cylinder 2, the left punching cylinder 17, the right pier extrusion cylinder 18, the right punching cylinder 19, the rear pier extrusion cylinder 5 and the rear punching cylinder 24 respectively, and the operating speed is 10-100 mm / s; (8) The rear extrusion cylinder 5 drives the rear extrusion flange 6 to extrude the round rod-shaped blank 27; (9) The rear punching cylinder 24 drives the rear punching device 7 to punch the round rod-shaped blank 27; (10) The left punching cylinder 17 drives the left punching device 4, and the right punching cylinder 19 drives the right punching device 21, and punches holes at both ends of the round rod-shaped blank 27 at the same time; (11) The left extrusion cylinder 2 drives the left extrusion flange 3, and the right extrusion cylinder 18 drives the right extrusion flange 20, and simultaneously extrudes both ends of the round rod-shaped blank 27; (12) The left pier extrusion flange 3, the left punching device 4, the right pier extrusion flange 20, the right punching device 21, the rear pier extrusion flange 6 and the rear punching device 7 are driven out of the die by the left pier extrusion cylinder 2, the left punching cylinder 17, the right pier extrusion cylinder 18, the right punching cylinder 19, the rear pier extrusion cylinder 5 and the rear punching cylinder 24 respectively, and the three-way hollow valve body forging prefabricated part is formed in an integrated manner; (13) The gate device 8 moves upward and returns to its original position; (14) The die is pulled out from the fixed middle beam 13 of the frame body 1 by the die pulling device 10, and then the upper die 25 is lifted by the die opening device 9. The operating speed of the die pulling device 10 is 50-200 mm / s; (15) Take out the three-way hollow valve body forging prefabricated part; The above forming process is completed; multiple forgings are completed through cyclic operations.

[0029] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A forged three-way hollow valve body preform, characterized in that: It comprises a valve body prefabricated component body (1A) and 1 to 3 flanges, wherein the valve body prefabricated component body (1A) comprises a first end, a second end and a third end; When the number of flanges is 1, the flange is located at the first end, at the second end, or at the third end; when the number of flanges is 2, two flanges are located at the first end and the second end, or at the first end and the third end, or at the second end and the third end; when the number of flanges is 3, three flanges are located at the first end, the second end, and the third end, respectively; The valve body preform body (1A) has three inner parts, namely, a first inner hole (1C1), a second inner hole (1C2), and a third inner hole (1C3), which extend from the first end, the second end, and the third end of the valve body preform body (1A) to the middle of the valve body preform body (1A), respectively. The first inner hole (1C1), the second inner hole (1C2), and the third inner hole (1C3) do not completely penetrate the valve body, and the inner hole coaxial with the flange penetrates the flange in the direction of the axis. There are barrier walls between the first inner hole (1C1), the second inner hole (1C2), and the third inner hole (1C3), so that the first inner hole (1C1), the second inner hole (1C2), and the third inner hole (1C3) are not connected to each other. The valve body preform body (1A), the flange, the first inner hole (1C1), the second inner hole (1C2), and the third inner hole (1C3) are directly formed by forging integrated processing.

2. A three-way hollow valve body, formed by processing a forged three-way hollow valve body preform according to claim 1, characterized in that: The barrier wall is removed by mechanical processing, so that the first inner hole (1C1), the second inner hole (1C2), and the third inner hole (1C3) are connected, thereby forming a completely through-going valve body.

3. The three-way hollow valve body according to claim 2, characterized in that: The mechanical processing method is lathe processing, punching machine processing or milling machine processing.

4. An integrated processing device for processing the forged three-way hollow valve body preform according to claim 1, characterized in that: The processing equipment comprises a rear extrusion cylinder (5), a rear extrusion flange (6), a rear punching cylinder (24), and a rear punching device (7).

5. The integrated processing equipment for forging a three-way hollow valve body preform according to claim 4 is characterized in that: The processing equipment further comprises a left extrusion cylinder (2), a left extrusion flange (3), a left punching cylinder (17), a left punching device (4), a right extrusion cylinder (18), a right extrusion flange (20), a right punching cylinder (19), and a right punching device (21).

6. The integrated processing equipment for forging a three-way hollow valve body preform according to claim 5 is characterized in that: The left pier extrusion cylinder (2), the left pier extrusion flange (3), the left punching cylinder (17) and the left punching device (4) are symmetrically and coaxially installed with the right pier extrusion cylinder (18), the right pier extrusion flange (20), the right punching cylinder (19) and the right punching device (21); the rear pier extrusion cylinder (5), the rear pier extrusion flange (6), the rear punching cylinder (24) and the rear punching device (7) are coaxially installed.

7. The integrated processing equipment for forging a three-way hollow valve body preform according to claim 5 is characterized in that: The processing equipment further comprises a frame body (1), wherein a left extrusion cylinder (2) is mounted on the left end of the frame body (1), wherein a left punching cylinder (17) is mounted inside the left extrusion cylinder (2), wherein the left extrusion cylinder (2) drives the left extrusion flange (3) to extrude, and wherein the left punching cylinder (17) drives the left punching device (4) to punch; a right extrusion cylinder (18) is mounted on the right end of the frame body (1), wherein a right punching cylinder (19) is mounted inside the right extrusion cylinder (18), wherein the right extrusion cylinder (18) drives the right extrusion flange (20) to extrude, and wherein the right punching cylinder (19) drives the right punching device (21) to punch; and a rear extrusion cylinder (5) is mounted on the rear end of the frame body (1), wherein a rear punching cylinder (24) is mounted inside the rear extrusion cylinder (5), wherein the rear extrusion cylinder (5) drives the rear extrusion flange (6) to extrude, and wherein the rear punching cylinder (24) drives the rear punching device (7) to punch.

8. The integrated processing equipment for forging a three-way hollow valve body preform according to claim 7 is characterized in that: The frame fuselage (1) comprises a left fixed beam (11) located at the left end of the frame fuselage (1), a left movable beam (12) connected to the right end of the left fixed beam (11), a fixed middle beam (13) located at the middle end of the frame fuselage (1), a right fixed beam (22) located at the right end of the frame fuselage (1), a right movable beam (23) connected to the left end of the right fixed beam (22), a rear fixed beam (14) located at the rear end of the frame fuselage (1), a rear movable beam (15) connected to the front end of the rear fixed beam (14), and a tie rod (16). The left fixed beam (11), the left movable beam (12), the fixed middle beam (13), the right fixed beam (22), the right movable beam (23), the rear fixed beam (14), and the rear movable beam (15) are all connected via the tie rod (16). The left fixed beam (11) 1) A left pier squeezing cylinder (2) is installed; the left pier squeezing cylinder (2) installed on the left fixed beam (11) drives the left pier squeezing flange (3) installed on the right end of the left movable beam (12) to pierce, and the left punching cylinder (17) installed in the left pier squeezing cylinder (2) drives the left punching device (4) to punch; the right pier squeezing cylinder (18) installed on the right fixed beam (22) drives the right pier squeezing flange (20) installed on the left end of the right movable beam (23) to pierce, and the right punching cylinder (19) installed in the right pier squeezing cylinder (18) drives the right punching device (21) to punch; the rear pier squeezing cylinder (5) installed on the rear fixed beam (14) drives the rear pier squeezing flange (6) installed on the front end of the rear movable beam (15) to pierce, and the rear punching cylinder (24) installed in the rear pier squeezing cylinder (5) drives the rear punching device (7) to punch; A mold is installed inside the fixed center beam (13), and a blank (27) is placed in the mold. A mold opening device (9) is installed above the front end of the fixed center beam (13), and a die drawing device (10) is installed below the front end of the fixed center beam (13). A gate device (8) is installed at the upper end of the fixed center beam (13). The mold is pulled out or pushed in by the die drawing device (10), and is opened or closed by the mold opening device (9), and is radially limited by the gate device (8).

9. The integrated processing equipment for forging a three-way hollow valve body preform according to claim 5, characterized in that: The processing equipment also includes a die drawing device (10), the die drawing device (10) including a guide rail (10-1) symmetrically arranged below the front end of the middle end of the frame body (1), a guide rail convex strip (10-2) is arranged on the outer side of the upper end of the guide rail (10-1), and is movably connected to the grooves at both ends of the lower die (26) of the die, a die drawing connector (10-3) is arranged between the guide rails (10-1), one end of the die drawing connector (10-3) is connected to a die drawing cylinder (10-4) installed below the front end of the middle end of the frame body (1) and located at the lower end of the guide rail (10-1), and the other end of the die drawing connector (10-3) is sleeved on the lower die (26) of the die, and the die drawing connector (10-3) is driven by the die drawing cylinder (10-4) to drive the die to be pulled out or pushed forward on the guide rail (10-1).

10. The integrated processing equipment for forging a three-way hollow valve body preform according to claim 5, characterized in that: The processing equipment further comprises a gate device (8), the gate device (8) comprising a gate cylinder (8-1) disposed at the upper end of the middle end of the frame body (1), the gate cylinder (8-1) driving the gate (8-2) to move up and down to radially limit the mold, an inverted U-shaped groove (8-3) is disposed in the middle of the gate (8-2), and the inverted U-shaped groove (8-3) is clamped on the die drawing device (10).

11. The integrated processing equipment for forging a three-way hollow valve body preform according to claim 5, characterized in that: The processing equipment also includes a mold opening device (9), the mold opening device (9) includes a mold opening oil cylinder (9-1) disposed above the front end of the middle end of the frame body (1), guide pillars (9-2) are symmetrically disposed at both ends of the mold opening oil cylinder (9-1), the lower ends of the guide pillars (9-2) are connected to an opening mold plate (9-3), and mold opening convex strips (9-4) are symmetrically disposed at both ends of the opening mold plate (9-3), which are movably connected to grooves at both ends of the upper mold (25) of the mold; the mold opening oil cylinder (9-1) drives the opening mold plate (9-3) to move up and down, thereby driving the upper mold (25) of the mold to open or close.

12. A method for processing the forged three-way hollow valve body preform of claim 1, using the integrated processing equipment for the forged three-way hollow valve body preform of claim 5, characterized in that: The following steps are involved: The left pier extrusion flange (3), the left punching device (4), the right pier extrusion flange (20), the right punching device (21), the rear pier extrusion flange (6) and the rear punching device (7) are driven to the material receiving position by the left pier extrusion cylinder (2), the left punching cylinder (17), the right pier extrusion cylinder (18), the right punching cylinder (19), the rear pier extrusion cylinder (5) and the rear punching cylinder (24) respectively; The rear extrusion cylinder (5) drives the rear extrusion flange (6) to extrude the blank (27); The rear punching cylinder (24) drives the rear punching device (7) to punch the blank (27); The left punching cylinder (17) drives the left punching device (4), and the right punching cylinder (19) drives the right punching device (21), and punches holes at both ends of the blank (27) at the same time; The left extrusion cylinder (2) drives the left extrusion flange (3), and the right extrusion cylinder (18) drives the right extrusion flange (20), and the two ends of the blank (27) are extruded at the same time; The left pier extrusion flange (3), the left punching device (4), the right pier extrusion flange (20), the right punching device (21), the rear pier extrusion flange (6) and the rear punching device (7) are driven out of the die by the left pier extrusion cylinder (2), the left punching cylinder (17), the right pier extrusion cylinder (18), the right punching cylinder (19), the rear pier extrusion cylinder (5) and the rear punching cylinder (24) respectively, and the three-way hollow valve body preform is integrally forged.

13. The method for processing a forged three-way hollow valve body preform according to claim 12, characterized in that: The method further comprises the following pretreatment steps: preheating the left pier extruded flange (3), the left punching device (4), the right pier extruded flange (20), the right punching device (21), the rear pier extruded flange (6) and the rear punching device (7); and spraying the coating material on the left pier extruded flange (3), the left punching device (4), the right pier extruded flange (20), the right punching device (21), the rear pier extruded flange (6) and the rear punching device (7).

14. The method for processing a forged three-way hollow valve body preform according to claim 12, characterized in that: The method also includes a front die drawing and die opening step: the die is drawn out from the fixed middle beam (13) of the frame body (1) by the die drawing device (10), and then the upper die (25) is lifted by the die opening device (9); the blank (27) is placed in a heating furnace for heating, and the heated blank (27) is placed in the die; the upper die (25) is lowered by the die opening device (9), and the die drawing device (10) sends the die into the internal pressing station of the fixed middle beam (13) of the frame body (1), and the die is sealed by the gate device (8).

15. The method for processing a forged three-way hollow valve body preform according to claim 12, characterized in that: After the two ends of the blank (27) are pierced, a post-die opening step is also included: the gate device (8) is moved upward and returned to its original position; the die is pulled out of the fixed middle beam (13) of the frame body (1) by the die pulling device (10), and then the upper die (25) is lifted by the die opening device (9); and the three-way hollow valve body prefabricated part is taken out.

16. The method for processing a forged three-way hollow valve body preform according to claim 12, characterized in that: Multiple forgings are completed through cyclic operations.

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