Device and process for frictional semi-solid additive manufacturing by rotary extrusion of chips for cylindrical valve bodies of ground well valves

Abstract

The application discloses a kind of ground well valve barrel cylindrical valve body chip rotary extrusion friction semi-solid additive manufacturing device and process, device includes U-shaped frame, crossbeam, first nut motor composite mechanism, second nut motor composite mechanism, T-shaped disc type double rotor motor type male die, first nut motor composite mechanism, second nut motor composite mechanism etc.;When working, first put chip into mould cavity, by the "friction heat effect" generated by T-shaped disc type double rotor motor type male die "rotary extrusion friction" and valve body lower die "reverse rotation friction", the forming of first layer semi-solid spherulitic material valve body barrel wall is realized, then repeatedly additive iteration is realized to form valve body barrel wall, after turning T-shaped disc type double rotor motor type male die, ground well valve barrel cylindrical valve body parts are formed by "vibration, rotary extrusion friction" mode.This device is compact in structure, process is simple, and part material grain is small and uniform, and the organization is dense, high in strength, with good internal organization performance.

Description

Technical Field

[0001] This invention belongs to the field of forming and manufacturing technology of cylindrical valve bodies for well valves, and specifically relates to the apparatus and process for semi-solid additive manufacturing of cylindrical valve bodies by chip spinning and friction. Background Technology

[0002] Ground well valves are typically installed at the end of the refueling pipeline network on the apron. Their main function is to connect with the refueling truck connector to control the flow of aviation kerosene, making them crucial equipment for aircraft refueling operations. The ground well valve is housed within a cylindrical valve body. The housing structure mainly consists of an inner well casing and an outer well casing. The outer and inner well casings are independent and do not interfere with each other, effectively preventing damage to the fuel supply network caused by natural disasters such as ground subsidence and earthquakes.

[0003] Traditional methods for manufacturing cylindrical valve bodies for wellbore valves have several drawbacks. Turning results in significant material waste, the cutting of metal fibers, and a reduction in the mechanical properties of the parts. Casting cannot fully realize the inherent mechanical properties of the material. Forging for complex shapes suffers from low material utilization and high forming loads; furthermore, the low material utilization leads to a waste of alloying element resources. In sheet metal hydraulic deep drawing, high fluid pressure is required from the hydraulic system, placing high demands on its design. Moreover, existing sheet metal hydraulic forming technologies have limited research on low-plasticity materials.

[0004] Currently, the base material obtained from recycled metal chips still requires secondary machining to meet the shape, size, and precision requirements of parts. Furthermore, the strain energy of metal chips is not being effectively utilized. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, the present invention aims to provide a semi-solid additive manufacturing apparatus and process for a well valve cylindrical body by chip spin extrusion friction, through which a high-performance well valve cylindrical body with a semi-solid spherulitic structure is prepared.

[0006] To achieve the above objectives, on the one hand, the present invention provides a semi-solid additive manufacturing device for the spun extrusion friction of a cylindrical valve body for a well valve, comprising a U-shaped frame and a T-shaped disc-type dual-rotor motor-type punch; a crossbeam is fixedly connected to the upper side of the U-shaped frame 1, and a first servo motor and a second servo motor are fixedly connected to the upper side of the crossbeam respectively, and a first lead screw and a second lead screw are fixedly connected to the output ends of the first servo motor and the second servo motor respectively, and a first nut motor composite mechanism and a second nut motor composite mechanism are respectively fitted on the first lead screw and the second lead screw; both ends of the T-shaped disc-type dual-rotor motor-type punch are fixedly connected to the first nut motor composite mechanism and the second nut motor composite mechanism respectively, the upper end of the T-shaped disc-type dual-rotor motor-type punch is an ultrasonic vibration end face, and a vent hole is provided in the middle part of the T-shaped disc-type dual-rotor motor-type punch; a first hydraulic cylinder is fixedly connected to the bottom of the U-shaped frame 1, a servo turntable is fixedly connected to the upper side of the first hydraulic cylinder, a second hydraulic cylinder and a lower valve body mold are fixedly connected to the upper side of the servo turntable, and a push rod is provided on the upper side of the second hydraulic cylinder.

[0007] On the other hand, the present invention also provides a manufacturing process based on the above-mentioned well valve cylindrical body chip spin extrusion friction semi-solid additive manufacturing apparatus, comprising the following steps:

[0008] Step 1. Place some aluminum alloy shavings into the mold cavity of the lower die of the valve body to obtain the first type of aluminum alloy shavings. Next, control the first and second servo motors to work and drive the first and second lead screws to rotate, thereby causing the first and second nut motor composite mechanisms to drive the T-shaped disc dual rotor motor punch to move vertically downward. At the same time, control the T-shaped disc dual rotor motor punch to generate "rotational motion". Then, control the rotation of the servo turntable to cause the lower die of the valve body, which is fixed to it, to generate a rotation in the "opposite direction" to the T-shaped disc dual rotor motor punch. The T-shaped disc-type dual-rotor motor punch rotates vertically downwards and contacts the first-type aluminum alloy cutting material, generating a "spinning friction" effect on the first-type aluminum alloy cutting material. The lower die of the valve body also generates a "friction" effect on the first-type aluminum alloy cutting material. Under the "friction heat generation" effect, the first-type aluminum alloy cutting material is heated to prepare a semi-solid spherulitic aluminum alloy billet with an average grain size of 30μm~50μm, thereby obtaining the first layer of semi-solid spherulitic material valve body cylinder wall. The waste gas generated during the "friction heat generation" process is discharged through the vent.

[0009] Step 2. Control the T-type disc dual rotor motor punch and servo turntable to stop working. At the same time, control the first servo motor and the second servo motor to work and drive the first lead screw and the second lead screw to rotate in opposite directions. This causes the first nut motor composite mechanism and the second nut motor composite mechanism to drive the T-type disc dual rotor motor punch to move vertically upward to the initial position of Step 1.

[0010] Step 3. Repeat steps 1 and 2 until the cylindrical valve body wall part of the well valve is obtained;

[0011] Step 4. Control the operation of the first nut motor composite mechanism and the second nut motor composite mechanism to drive the T-type disc double rotor motor punch to rotate 180°, ensuring that the ultrasonic vibration end face changes from the upper side to the lower side of the T-type disc double rotor motor punch;

[0012] Step 5. Place the remaining aluminum alloy shavings into the mold cavity of the lower die of the valve body. Control the first and second servo motors to work and drive the first and second lead screws to rotate, thereby causing the first nut motor composite mechanism and the second nut motor composite mechanism to drive the T-type disc dual rotor motor punch to move vertically downward. Then, simultaneously control the ultrasonic vibration end face and control the T-type disc dual rotor motor punch to work, so that the ultrasonic vibration end face produces "downward vibration and rotational motion"; then the T-type disc dual rotor motor... The ultrasonic vibration end face on the punch moves vertically downwards in a "vibration and rotation" motion, which comes into contact with the first-type aluminum alloy cutting scrap, generating a "spinning and vibration friction" effect on the first-type aluminum alloy cutting scrap. Under the "friction heat generation" effect, the first-type aluminum alloy cutting scrap is heated and a semi-solid spheroidal blank with an average grain size of 30μm~50μm is prepared at the bottom of the well valve cylindrical body. This blank is then semi-solid metallurgically connected to the already prepared well valve cylindrical body wall parts to form the well valve cylindrical body parts.

[0013] Step 6. Control the T-type disc dual rotor motor punch and servo turntable to stop working. At the same time, control the first servo motor and the second servo motor to work and drive the first lead screw and the second lead screw to rotate in opposite directions. This causes the first nut motor composite mechanism and the second nut motor composite mechanism to drive the T-type disc dual rotor motor punch 9 to move vertically upward to the initial position of Step 1.

[0014] Step 7. Control the second hydraulic cylinder to push the push rod out and remove the cylindrical valve body part of the well valve.

[0015] Compared to existing technologies, the present invention utilizes a chip-layout spin extrusion friction-induced semi-solid additive manufacturing process to prepare the cylindrical valve body of a well valve, which has the following advantages:

[0016] 1. The inner and outer wellbore bodies of the well valve are manufactured as a single unit, eliminating the need to drill threaded holes for assembling the inner and outer wellbore bodies and avoiding the troublesome process of assembling them.

[0017] 2. Fully utilize the original strain energy of the chips and scrap, as well as the strain energy from rotational extrusion friction, to induce a semi-solid state. By heating the chips and scrap to a semi-solid temperature through friction and maintaining it for a period of time, the deformation of the chips and scrap allows the strain energy stored inside the material to be utilized, and a semi-solid billet is prepared using the strain-induced method.

[0018] 3. By using additive manufacturing to produce cylindrical valve bodies for well valves, the forming force per layer is small, and the semi-solid deformation resistance is low. The semi-solid slurry has already released some of the latent heat of crystallization, which reduces the thermal shock to the mold and improves the mold life.

[0019] 4. Multi-layer sequential rotary extrusion friction semi-solid forming ensures a thorough forming process, resulting in parts with good internal structure and high strength. Rotary extrusion improves material properties by increasing deformation shear stress and shear strain to refine grains.

[0020] 5. Additive manufacturing is an advanced manufacturing technology that stacks materials layer by layer. It offers high manufacturing freedom and fast forming speed, providing a new technical approach for the manufacturing of integrated well valve cylindrical bodies.

[0021] 6. Compared with traditional cylindrical part processing technology, this semi-solid additive manufacturing process can save production costs, improve production efficiency, and process parts with complex shapes. The formed parts have fine and uniform grains, dense structure, high dimensional accuracy, few defects, high strength, and good internal structure properties. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the semi-solid additive manufacturing apparatus for the cylindrical valve body of the well valve of the present invention, which involves chip spinning and friction.

[0023] Figure 2 This is a schematic diagram of step 1 of the semi-solid additive manufacturing process for the cylindrical valve body of the well valve of the present invention, which involves chip spinning and friction.

[0024] Figure 3 This is a schematic diagram of step 2 of the semi-solid additive manufacturing process for the cylindrical valve body of the well valve of the present invention, which involves chip spinning and friction.

[0025] Figure 4 This is a schematic diagram of the formation of the cylindrical valve body wall part of the well valve after step 3 of the semi-solid additive manufacturing process of the well valve body of the present invention is completed.

[0026] Figure 5 This is a schematic diagram of step 4 of the semi-solid additive manufacturing process for the cylindrical valve body of the well valve of the present invention, which involves chip spinning and friction.

[0027] Figure 6 This is a schematic diagram of step 5 of the semi-solid additive manufacturing process for the cylindrical valve body of the well valve of the present invention, which involves chip spinning and friction.

[0028] Figure 7 This is a schematic diagram of steps 6 and 7 of the semi-solid additive manufacturing process for the cylindrical valve body of the well valve of the present invention, which involves chip spinning and friction.

[0029] Explanation of the labels in the diagram:

[0030] 1. U-shaped frame; 2. Crossbeam; 3. First servo motor; 4. Second servo motor; 5. First lead screw; 6. Second lead screw; 7. First nut motor composite mechanism; 8. Second nut motor composite mechanism; 9. T-shaped disc type double rotor motor type punch; 9-1. Ultrasonic vibration type end face; 9-2. Vent hole; 10. First hydraulic cylinder; 11. Servo turntable; 12. Second hydraulic cylinder; 13. Lower mold of valve body; 14. Push rod; 14-1. First-form aluminum alloy cutting scrap; 14-2. First layer of semi-solid spheroidal material valve body cylinder wall; 14-3. Well valve cylindrical valve body cylinder wall part; 14-4. Well valve cylindrical valve body bottom semi-solid spheroidal billet; 14-5. Well valve cylindrical valve body part. Detailed Implementation

[0031] The present invention will now be described in detail with reference to the accompanying drawings.

[0032] Reference Figure 1 A semi-solid additive manufacturing device for the cylindrical valve body of a well valve, comprising a U-shaped frame 1, a crossbeam 2 fixedly connected to the upper side of the U-shaped frame 1, a first servo motor 3 and a second servo motor 4 fixedly connected to the upper side of the crossbeam 2, a first lead screw 5 and a second lead screw 6 fixedly connected to the output ends of the first servo motor 3 and the second servo motor 4 respectively, a first nut motor composite mechanism 7 and a second nut motor composite mechanism 8 respectively fitted on the first lead screw 5 and the second lead screw 6, a T-shaped disc dual rotor motor type punch 9 fixedly connected to the first nut motor composite mechanism 7 and the second nut motor composite mechanism 8, the upper end of the T-shaped disc dual rotor motor type punch 9 being an ultrasonic vibration end face 9-1, and a vent hole 9-2 provided in the middle part of the T-shaped disc dual rotor motor type punch 9. The bottom of the U-shaped frame 1 is fixedly connected to a first hydraulic cylinder 10, the upper side of the first hydraulic cylinder 10 is fixedly connected to a servo turntable 11, the upper side of the servo turntable 11 is fixedly connected to a second hydraulic cylinder 12 and a lower mold of the valve body 13, and a push rod 14 is provided on the upper side of the second hydraulic cylinder 12.

[0033] Reference Figures 1-7 The semi-solid additive manufacturing process for the cylindrical valve body of a well valve, involving chip spinning and friction, specifically includes the following steps:

[0034] 1) A portion of aluminum alloy shavings 14 is placed into the mold cavity of the lower die 13 of the valve body to obtain the first type of aluminum alloy shavings 14-1. Then, the first servo motor 3 and the second servo motor 4 are controlled to drive the first lead screw 5 and the second lead screw 6 to rotate, thereby causing the first nut motor composite mechanism 7 and the second nut motor composite mechanism 8 to drive the T-shaped disc dual-rotor motor-type punch 9 to move vertically downwards. The T-shaped disc dual-rotor motor-type punch 9 is controlled to generate "rotational motion." Simultaneously, by controlling the rotation of the servo turntable 11, the lower die 13 of the valve body, which is fixed to it, generates a rotational motion "in the opposite direction" to the T-shaped disc dual-rotor motor-type punch 9. The vertically downward "rotational motion" of the T-shaped disc dual-rotor motor-type punch 9 contacts the first type of aluminum alloy shavings 14-1, generating a "spinning friction" effect on the first type of aluminum alloy shavings 14-1. The lower die 13 of the valve body also generates a "friction" effect on the first type of aluminum alloy shavings 14-1. Under the effect of "frictional heat generation", the first type of aluminum alloy cutting scrap 14-1 is heated to prepare a semi-solid spherulitic aluminum alloy billet with an average grain size of 30μm~50μm, thereby obtaining the first layer of semi-solid spherulitic material valve body wall 14-2, and the waste gas generated during the "frictional heat generation" process will be discharged through the vent 9-2.

[0035] 2) Control the T-type disc dual rotor motor type punch 9 and servo turntable 11 to stop working. At the same time, control the first servo motor 3 and the second servo motor 4 to work and drive the first lead screw 5 and the second lead screw 6 to rotate in opposite directions, thereby causing the first nut motor composite mechanism 7 and the second nut motor composite mechanism 8 to drive the T-type disc dual rotor motor type punch 9 to move vertically upward to the initial position of step 1).

[0036] 3) Repeat steps 1) and 2) above until the well valve cylindrical valve body wall part 14-3 is obtained.

[0037] 4) Control the first nut motor composite mechanism 7 and the second nut motor composite mechanism 8 to work, drive the T-type disc double rotor motor type punch 9 to rotate 180°, then the ultrasonic vibration end face 9-1 changes from the upper side to the lower side of the T-type disc double rotor motor type punch 9.

[0038] 5) A portion of the aluminum alloy shavings 14 is placed into the mold cavity of the lower mold 13 of the valve body. The first servo motor 3 and the second servo motor 4 are controlled to drive the first lead screw 5 and the second lead screw 6 to rotate, thereby causing the first nut motor composite mechanism 7 and the second nut motor composite mechanism 8 to drive the T-shaped disc dual rotor motor type punch 9 to move vertically downward. Then, the ultrasonic vibration end face 9-1 and the T-shaped disc dual rotor motor type punch 9 are controlled to work simultaneously, so that the ultrasonic vibration end face 9-1 generates "downward vibration and rotational motion". The ultrasonic vibration end face 9-1 on the T-shaped disc dual rotor motor type punch 9, which is vertically downward "vibrating and rotating", comes into contact with the first type of aluminum alloy shavings 14-1, generating "spinning and vibration friction" on the first type of aluminum alloy shavings 14-1. Under the effect of "frictional heat generation", the first type of aluminum alloy cutting scrap 14-1 is heated to prepare a semi-solid spheroidal blank 14-4 of the bottom of the well valve cylindrical body with an average grain size of 30μm~50μm, and achieves semi-solid metallurgical connection with the already prepared well valve cylindrical body wall part 14-3, so as to form the well valve cylindrical body part 14-5.

[0039] 6) Control the T-type disc dual rotor motor punch 9 and servo turntable 11 to stop working. At the same time, control the first servo motor 3 and the second servo motor 4 to work and drive the first lead screw 5 and the second lead screw 6 to rotate in opposite directions, thereby causing the first nut motor composite mechanism 7 and the second nut motor composite mechanism 8 to drive the T-type disc dual rotor motor punch 9 to move vertically upward to the initial position of step 1).

[0040] 7) Control the second hydraulic cylinder 12 to work and push out the push rod 14, then the cylindrical valve body part 14-5 of the well valve can be successfully removed.

[0041] In addition, refer to Figure 1 and Figure 2 The semi-solid additive manufacturing process for the cylindrical valve body of the well valve of the present invention can also achieve "forging plastic deformation" of the cylindrical valve body part 14-5 during implementation to enhance the mechanical properties of the part. The specific execution process is as follows:

[0042] After the cylindrical valve body part 14-5 of the well valve described in this invention is formed by the chip layer spin extrusion friction induced semi-solid additive manufacturing process (i.e., after completing the process step 5 described in this invention), the first hydraulic cylinder 10 can be controlled to "move upward", thereby driving the servo turntable 11 and the lower mold of the valve body 13 to "move upward" to achieve "forging plastic deformation" of the cylindrical valve body part 14-5 of the well valve.

Claims

1. A manufacturing process for a semi-solid additive manufacturing device for a cylindrical valve body of a well valve, characterized in that: The manufacturing device includes a U-shaped frame and a T-shaped disc-type dual rotor motor punch; a crossbeam is fixedly connected to the upper side of the U-shaped frame (1), and a first servo motor and a second servo motor are fixedly connected to the upper side of the crossbeam respectively. The output ends of the first servo motor and the second servo motor are fixedly connected to a first lead screw and a second lead screw respectively. A first nut motor composite mechanism and a second nut motor composite mechanism are respectively installed on the first lead screw and the second lead screw. The two ends of the T-shaped disc-type dual rotor motor punch are fixedly connected to the first nut motor composite mechanism and the second nut motor composite mechanism respectively. The upper end of the T-shaped disc-type dual rotor motor punch is an ultrasonic vibration end face. A vent hole is provided in the middle part of the T-shaped disc-type dual rotor motor punch; a first hydraulic cylinder is fixedly connected to the bottom of the U-shaped frame (1), a servo turntable is fixedly connected to the upper side of the first hydraulic cylinder, a second hydraulic cylinder and a valve body lower mold are fixedly connected to the upper side of the servo turntable, and a push rod is provided on the upper side of the second hydraulic cylinder; The manufacturing process includes the following steps: Step 1. Place a portion of the aluminum alloy shavings into the mold cavity of the lower die of the valve body to obtain the first type of aluminum alloy shavings. Next, control the first and second servo motors to operate and drive the first and second lead screws to rotate, causing the first and second nut motor composite mechanisms to drive the T-shaped disc dual-rotor motor-type punch to move vertically downwards. Simultaneously, control the T-shaped disc dual-rotor motor-type punch to generate "rotational motion." Then, control the rotation of the servo turntable to cause the lower die of the valve body, which is fixed to it, to generate "opposite motion" to the T-shaped disc dual-rotor motor-type punch. The T-shaped disc-type dual rotor motor punch rotates vertically downwards and contacts the first-type aluminum alloy cutting material, generating a "spinning and extrusion friction" effect on the first-type aluminum alloy cutting material. The lower die of the valve body generates a "friction" effect on the first-type aluminum alloy cutting material. Under the "friction heat generation" effect, the first-type aluminum alloy cutting material is heated to prepare a semi-solid spherulitic aluminum alloy billet with an average grain size of 30μm~50μm, thereby obtaining the first layer of semi-solid spherulitic material valve body cylinder wall. The waste gas generated during the "friction heat generation" process is discharged through the vent. Step 2. Control the T-type disc dual rotor motor punch and servo turntable to stop working. At the same time, control the first servo motor and the second servo motor to work and drive the first lead screw and the second lead screw to rotate in opposite directions, so that the first nut motor composite mechanism and the second nut motor composite mechanism drive the T-type disc dual rotor motor punch to move vertically upward to the initial position of Step 1. Step 3. Repeat steps 1 and 2 until the cylindrical valve body wall part of the well valve is obtained; Step 4. Control the operation of the first nut motor composite mechanism and the second nut motor composite mechanism to drive the T-type disc double rotor motor punch to rotate 180°, ensuring that the ultrasonic vibration end face changes from the upper side to the lower side of the T-type disc double rotor motor punch; Step 5. Place the remaining aluminum alloy shavings into the mold cavity of the lower die of the valve body. Control the first servo motor and the second servo motor to work and drive the first lead screw and the second lead screw to rotate, so that the first nut motor composite mechanism and the second nut motor composite mechanism drive the T-type disc double rotor motor punch to move vertically downward. Then, simultaneously control the ultrasonic vibration end face to work with the T-type disc double rotor motor punch, so that the ultrasonic vibration end face generates "downward vibration and rotational motion". The ultrasonic vibration end face on the T-type disc double rotor motor punch, which "vibrates and rotates" vertically downward, comes into contact with the first type of aluminum alloy shavings, and generates "spinning and vibration friction" on the first type of aluminum alloy shavings. Under the "friction heat generation" effect, the first type of aluminum alloy shavings are heated and a semi-solid spheroidal blank with an average grain size of 30μm~50μm is prepared for the bottom of the well valve cylindrical body. It is then semi-solid metallurgically connected with the already prepared well valve cylindrical body wall parts to form the well valve cylindrical body parts. Step 6. Control the T-type disc dual rotor motor punch and servo turntable to stop working. At the same time, control the first servo motor and the second servo motor to work and drive the first lead screw and the second lead screw to rotate in opposite directions. The first nut motor composite mechanism and the second nut motor composite mechanism drive the T-type disc dual rotor motor punch to move vertically upward to the initial position of Step 1. Step 7. Control the second hydraulic cylinder to push the push rod out and remove the cylindrical valve body part of the well valve.

Images