Ring piece radial and axial size control method

Abstract

The invention discloses a method for controlling radial and axial sizes of a ring piece, which relates to the technical field of material processing, and specifically comprises the following modes and corresponding methods: an inner diameter bulging mode: repeatedly performing inner bulging operation and rotating operation on the ring piece until the bulging requirement is met; in the outer diameter contraction mode, the outer side extrusion operation and the rotating operation on the annular piece are repeatedly conducted till the outer diameter contraction requirement is met; in the inner diameter bulging and outer diameter shrinking mode, deformation operation and rotation operation on the annular piece are repeatedly carried out, and the deformation operation comprises inner expansion operation and outer side extrusion operation and is finished until the deformation requirement is met; and in the inner diameter bulging, outer diameter shrinkage and end face deformation mode, after the inner diameter bulging and outer diameter shrinkage mode is completed, end face deformation extrusion operation is conducted. The final annular piece obtained through the method is uniform in wall thickness, good in inner and outer diameter roundness and smooth in end face, and the machined annular piece can be high in radial and axial size precision and more uniform in deformation.

Description

Technical Field

[0001] The invention relates to the technical field of material processing, and more particularly to a method for controlling the radial and axial dimensions of a ring. Background Art

[0002] Large rings are mostly used in important fields such as aerospace, wind power generation, and nuclear power industry. Rings are generally produced by ring rolling technology. Due to their large diameter and thin wall thickness, defects such as ellipse, large and small mouths, and uneven wall thickness are prone to occur during the forming process. This makes it necessary to increase the design margin of ring forgings in actual production, reduce material utilization, and increase machining margins and difficulty. Therefore, a shaping process such as bulging is often required after forming.

[0003] At present, there are still some problems in the ring bulging process, such as:

[0004] (1) After bulging, only the inner diameter has a good roundness, and the outer diameter is free and cannot be controlled;

[0005] (2) If the wall thickness is uneven after bulging, there will be differences in the structure and mechanical properties on the same cross section, which will not meet the technical requirements.

[0006] Therefore, how to provide an effective method for controlling the radial and axial dimensions of a ring that can effectively control the ring bulging accuracy is an issue that needs to be urgently addressed by those skilled in the art. Summary of the invention

[0007] In view of this, the present invention provides a method for controlling the axial dimension of a ring, aiming to solve the above technical problems.

[0008] In order to achieve the above object, the present invention adopts the following technical solution:

[0009] A method for controlling the radial and axial dimensions of a ring, specifically including the following modes and corresponding methods:

[0010] Inner diameter bulging mode: Repeat the inner expansion operation and rotation operation of the ring part until the inner expansion operation covers the entire inner wall surface of the ring part and the bulging requirements are met;

[0011] Outer diameter contraction mode: Repeat the outer extrusion operation and rotation operation of the ring part until the outer extrusion operation covers the entire outer wall surface of the ring part and the outer diameter contraction requirement is met;

[0012] Inner diameter expansion and outer diameter contraction mode: the deformation operation and rotation operation of the ring part are repeated, and the deformation operation includes inner expansion operation and outer extrusion operation, until the deformation operation covers the entire outer wall surface of the ring part and the deformation requirements are met;

[0013] Inner diameter bulging, outer diameter shrinkage and end face deformation mode: the deformation operation and rotation operation of the ring are repeatedly performed, and the deformation operation includes inner expansion operation and outer extrusion operation. After the deformation operation covers the entire outer wall surface of the ring and meets the deformation requirements, the end face deformation extrusion operation is performed.

[0014] Preferably, in the above-mentioned method for controlling the radial and axial dimensions of a ring, the number of repeated operations in the above-mentioned mode is 3 to 10 times.

[0015] Preferably, in the above-mentioned method for controlling the radial-axial dimension of a ring, the single rotation angle of the rotation operation in the above-mentioned mode is between 5° and 45°.

[0016] Preferably, in the above-mentioned method for controlling the radial-axial dimension of a ring, the single rotation angle is 5°, 10°, 15°, 20° or 30°.

[0017] Preferably, in the above-mentioned ring radial-axial dimension control method, in the inner diameter expansion and outer diameter contraction modes, the sequence of the inner expansion operation and the outer extrusion operation in the deformation operation can be adjusted and changed according to processing requirements.

[0018] Preferably, in the above-mentioned method for controlling the radial-axial dimensions of a ring, in the inner diameter expansion, outer diameter contraction and end face deformation modes: the end face deformation extrusion operation performs stamping processing of a corresponding shape on the end face of the ring.

[0019] Preferably, in the above-mentioned method for controlling the radial and axial dimensions of a ring component, the amount of machining deformation of the ring component is 0.5% to 3%.

[0020] Preferably, in the above-mentioned method for controlling the radial and axial dimensions of a ring, the ring is a metal part, and the ring is heated to above 800° C. before the above-mentioned processing operation is performed.

[0021] Preferably, in the above-mentioned method for controlling the radial and axial dimensions of a ring component, the deformation operation of the ring component is achieved by linearly moving the mold.

[0022] Preferably, in the above-mentioned method for controlling the radial-axial dimension of a ring, the linear moving speed of the linear moving mold is not greater than 4 mm / s.

[0023] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a method for controlling the radial-axial dimensions of a ring, which can realize four deformation modes of the ring, namely, inner diameter expansion only, outer diameter contraction only, inner diameter expansion and outer diameter contraction at the same time, and radial-axial coordinated deformation of the inner and outer diameters and end faces of the ring. The final ring has uniform wall thickness, good inner and outer diameter roundness, and a smooth end face. It can even obtain features of end faces with different shapes and sizes, high radial-axial dimensional accuracy, and more uniform deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0025] Figure 1 The accompanying drawing is a schematic structural diagram of a direct-drive expansion and contraction forming device provided by the present invention;

[0026] Figure 2 The accompanying drawing is a schematic structural diagram of a direct-drive expansion and contraction clamping mechanism provided by the present invention;

[0027] Figure 3 The accompanying drawing is a schematic structural diagram of an inner driving block provided by the present invention;

[0028] Figure 4 The accompanying drawing is a schematic structural diagram of the inner punch assembly provided by the present invention;

[0029] Figure 5 The accompanying drawing is a cross-sectional view of the inner punch assembly provided by the present invention;

[0030] Figure 6 The accompanying drawing is a schematic structural diagram of a top pressing assembly provided by the present invention;

[0031] Figure 7 The accompanying drawing is a schematic structural diagram of the direct-drive expansion and contraction forming device provided by the present invention in cooperation with a top pressing assembly;

[0032] Figure 8 The accompanying drawing is a schematic structural diagram of a direct-drive expansion and contraction forming device for processing large-size annular parts provided by the present invention;

[0033] Fig. 9 The accompanying drawing is a schematic structural diagram of a direct-drive expansion and contraction forming device for processing small-sized annular parts provided by the present invention.

[0034] in:

[0035] 1- Base;

[0036] 2- Ring frame;

[0037] 3-Linear slide;

[0038] 31-chute;

[0039] 4-Inner drive block;

[0040] 41-horizontal straight rod; 42-vertical straight rod;

[0041] 5-External drive block;

[0042] 51- avoidance slot;

[0043] 6- driving unit;

[0044] 61- radial lead screw; 62- radial displacement detection encoder;

[0045] 7-Inner punch assembly;

[0046] 71-supporting rod; 72-axial lead screw; 73-axial displacement detection encoder; 74-inner punch;

[0047] 8-Top pressure assembly;

[0048] 81-gantry; 82-hydraulic cylinder; 83-annular pressure plate; 84-external linear track;

[0049] 9- Ring piece. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] The embodiment of the present invention discloses a method for controlling the axial dimension of a ring, which specifically includes the following modes and corresponding methods:

[0052] Inner diameter bulging mode: Repeat the inner expansion operation and rotation operation of the ring part until the inner expansion operation covers the entire inner wall surface of the ring part and the bulging requirements are met;

[0053] Outer diameter contraction mode: Repeat the outer extrusion operation and rotation operation of the ring part until the outer extrusion operation covers the entire outer wall surface of the ring part and the outer diameter contraction requirement is met;

[0054] Inner diameter expansion and outer diameter contraction mode: the deformation operation and rotation operation of the ring part are repeated, and the deformation operation includes inner expansion operation and outer extrusion operation, until the deformation operation covers the entire outer wall surface of the ring part and the deformation requirements are met;

[0055] Inner diameter bulging, outer diameter shrinkage and end face deformation mode: the deformation operation and rotation operation of the ring are repeatedly performed, and the deformation operation includes inner expansion operation and outer extrusion operation. After the deformation operation covers the entire outer wall surface of the ring and meets the deformation requirements, the end face deformation extrusion operation is performed.

[0056] In order to further optimize the above technical solution, the number of repeated operations in the above mode is 3 to 10 times.

[0057] In order to further optimize the above technical solution, the single rotation angle of the rotation operation in the above mode is between 5° and 45°.

[0058] In order to further optimize the above technical solution, the single rotation angle is 5°, 10°, 15°, 20° or 30°.

[0059] In order to further optimize the above technical solution, in the inner diameter expansion and outer diameter contraction modes, the sequence of the inner expansion operation and the outer extrusion operation in the deformation operation can be adjusted and changed according to the processing requirements.

[0060] In order to further optimize the above technical solution, in the inner diameter bulging, outer diameter shrinking and end face deformation modes: the end face deformation extrusion operation performs stamping processing on the end face of the ring part into a corresponding shape.

[0061] In order to further optimize the above technical solution, the deformation operation of the ring part is realized by linearly moving the mold.

[0062] In order to meet the above operation modes, this embodiment provides a direct-drive expansion and contraction forming device, see the attached Figure 1 To Attachment Figure 3 , including a base 1, and also including a plurality of direct-drive expansion and contraction clamping mechanisms arranged around the center of the base 1;

[0063] The direct-drive expansion and contraction clamping mechanism includes: a power installation part, and also includes:

[0064] A linear slide rail 3, which is arranged on one side of the power installation portion, and a top surface of the linear slide rail 3 has a slide groove 31;

[0065] The inner driving block 4 is an L-shaped block structure, the horizontal straight rod 41 of the inner driving block 4 is slidably connected in the slide groove 31, and the vertical straight rod 42 of the inner driving block 4 is located above the linear slide rail 3;

[0066] The outer driving block 5 is slidably connected to the top of the linear guide rail 3 and does not interfere with the horizontal straight rod 41 of the inner driving block 4. The outer driving block 5 corresponds to the vertical straight rod 42 of the inner driving block 4.

[0067] The driving part 6 is installed on the power mounting part. The driving part 6 has a direct driving force end connected to the inner driving block 4 and the outer driving block 5 respectively. The inner driving block 4 and the outer driving block 5 can perform linear motion along the linear guide rail 3 driven by the direct driving force end.

[0068] In this embodiment, the power mounting part is an annular frame 2, and the linear slide rail 3, the inner drive block 4 and the outer drive block 5 are arranged on the inner side of the annular frame 2, and the multiple linear slide rails 3 are arranged in a divergent shape with the base 1 as the center of the circle, and the distance between the vertical straight rod 42 of the inner drive block 4 and the center of the circle of the base 1 is smaller than the distance between the outer drive block 5 and the center of the circle of the base 1; the driving part 6 is arranged on the outer side of the annular frame 2, and the straight driving force end of the driving part 6 passes through the annular frame 2.

[0069] In order to further optimize the above technical solution, the driving unit 6 includes two linear drive motors installed on the power mounting part, and the power output ends of the two linear drive motors are connected to radial screws 61. Threaded holes are provided on the horizontal straight rod 41 of the inner drive block 4 and the outer drive block 5, and the two threaded holes are respectively threadedly connected to the two radial screws 61.

[0070] In order to further optimize the above technical solution, a radial displacement detection encoder 62 for detecting the number of rotations of the linear drive motor is installed between the power output end of the linear drive motor and the radial screw 61. The outer shell of the radial displacement detection encoder 62 is fixed to the power mounting part, and the outer shell of the linear drive motor is fixed to the outer shell of the radial displacement detection encoder 62. The rotational power output by the linear drive motor is transmitted to the radial screw 61 through the radial displacement detection encoder 62.

[0071] In order to further optimize the above technical solution, the top surface of the horizontal straight rod 41 of the inner driving block 4 is higher than the top edge of the slide groove 31, and an avoidance groove 51 is opened on the bottom surface of the outer driving block 5, and the avoidance groove 51 cooperates with the part of the horizontal straight rod 41 of the inner driving block 4 protruding from the slide groove 31.

[0072] The number of the linear guide rails 3 is 3-15, such as 4, 6, 8, 10, 12, 15, etc. The accompanying drawings provided in this embodiment show 8 schematic diagrams.

[0073] In order to further optimize the above technical solution, it also includes a rotating screw rod that is arranged in a divergent shape with the base 1 as the center of the circle, and the end of the rotating screw rod that is away from the center of the circle of the base 1 is rotatably connected to the ring frame 2, and is driven by a rotating drive motor installed on the outside of the ring frame 2, and the horizontal highest point of the rotating screw rod is flush with the top surface of the horizontal straight rod 41 of the inner drive block 4, or higher than the top surface of the horizontal straight rod 41 of the inner drive block 4. In the drawings of this embodiment, the structure of the rotating screw rod is not shown, and the rotating screw rod can be arranged between adjacent linear guide rails 3, and more than 3 rotating screw rods can be arranged according to needs.

[0074] See attached Figure 4 and attached Figure 5, also includes an inner punch assembly 7, the inner punch assembly 7 includes a support rod 71, an axial lead screw 72, an axial displacement detection encoder 73, an inner punch 74 and an axial drive motor; the support rod 71 is fixed to the center of the top surface of the base 1, and the top of the support rod 71 has a threaded hole starting in the axial direction; the axial lead screw 72 is threadedly connected to the threaded hole; the power output end of the axial displacement detection encoder 73 is fixedly connected to the top of the axial lead screw 72; there are multiple inner punches 74, and the multiple inner punches 74 are all fixed on the bottom surface of the outer shell of the axial displacement detection encoder 73, and are arranged around the axial lead screw 72; the outer shell of the axial drive motor is fixedly connected to the top surface of the outer shell of the axial displacement detection encoder 73, and the rotational power output by the axial drive motor is transmitted to the axial lead screw 72 through the axial displacement detection encoder 73.

[0075] In order to further optimize the above technical solution, the inner punch 74 is a cone structure that is wide at the top and narrow at the bottom, and the side wall of the vertical straight rod 42 of the inner driving block 4 facing the inner punch 74 has an inclined surface that matches the cone structure.

[0076] In this embodiment, the angle of the bevel is preferably 5° to 15°. The inner punch assembly 7 is only used when processing a small-sized ring member 9. Fig. 9 shown.

[0077] See attached Figure 6 and attached Figure 7 , and also includes a top pressing component 8, which includes a gantry 81, a hydraulic cylinder 82 and an annular pressure plate 83; the gantry 81 is arranged on the outside of the annular frame 2; the fixed cylinder of the hydraulic cylinder 82 is vertically fixed on the crossbeam of the gantry 81; the annular pressure plate 83 is detachably connected to the bottom end of the telescopic cylinder of the hydraulic cylinder 82, and the annular pressure plate 83 corresponds to the annular gap between the inner driving block 4 and the outer driving block 5.

[0078] In order to further optimize the above technical solution, the bottom surface of the annular pressure plate 83 has a stamping protrusion.

[0079] As attached Figure 8 and attached Fig. 9 As shown, it is a schematic diagram of processing the ring member 9. The inner expansion or outer diameter contraction of the ring member 9 is achieved by moving the inner drive block 4 and the outer drive block 5. Each time of extrusion or internal expansion, the ring member 9 is rotated in conjunction with the rotating screw to drive the ring member 9 to rotate once, and then the processing continues.

[0080] Specific:

[0081] Step 1: Place the cold or hot annular member 9 between the inner drive block 4 and the outer drive block 5 .

[0082] Step 2: Start the driving part 6, drive the inner driving block 4 to move radially through the radial lead screw 61, and expand the inner diameter of the ring member 9 by squeezing the circumferential surface of the inner diameter of the ring member 9 through the inner driving block 4, i.e., bulging;

[0083] Step 3: Start the driving unit 6, drive the outer driving block 5 to move radially through the radial lead screw 61, and squeeze the circumferential surface of the outer diameter of the ring member 9 by the outer driving block 5 to reduce the outer diameter of the ring member 9, i.e., reduce the diameter;

[0084] Step 4: After the driving unit 6 is unloaded and the inner driving block 4 and the outer driving block 5 are distributed and reset, the control system rotates the rotating screw, and the circumferential surface of the rotating screw contacts the lower end surface of the ring member 9, and the friction force drives the ring member 9 to rotate a certain angle around its central axis of rotation, and the rotation angle is 5° to 45°.

[0085] Step 5: Repeat steps 2, 3, and 4 3 to 10 times to ensure that the annular member 9 is uniformly deformed.

[0086] Step 6: Keep the inner driving block 4 and the outer driving block 5 in the loading state in steps 2 and 3, start the top pressing assembly 8, and squeeze the end surface of the annular member 9 through the annular pressing plate 83 to achieve deformation of the annular member 9 in the height direction;

[0087] Step 7: After the deformation is completed, the mold is reset and the ring part 9 is taken out.

[0088] In this embodiment, the bottom ends of both sides of the gantry 81 are provided with outer linear rails 84 to facilitate the movement of the gantry 81 and the removal of the annular member 9.

[0089] In this embodiment, the power adopts the servo drive form driven by a motor. In other embodiments, it can also be driven by hydraulic pressure or pneumatic pressure.

[0090] The main disadvantages of existing technologies include:

[0091] (1) The bulging process can only be used to correct the inner diameter of the ring-shaped part;

[0092] (2) When the inner diameter ellipticity is large, the die and the inner diameter of the ring part cannot fit completely during bulging, that is, the inner diameter is still elliptical after bulging;

[0093] (3) The outer diameter of the ring is in a free state, and the shape and size accuracy is difficult to control. If the outer diameter of the ring is ovoid after ring rolling, the ovality of the outer diameter will be aggravated after the inner diameter is bulged;

[0094] (4) It is difficult to ensure the uniformity of overall roundness and tissue mechanical properties.

[0095] (5) Due to the movement characteristics of the wedge mechanism, the value after the horizontal stroke is converted to the vertical stroke is large, which makes the equipment bulky; and the friction between the conical punch and the expansion / reduction drive block will reduce the effective tonnage of the equipment; the drive block or punch will wear and reduce the service life of the equipment;

[0096] (6) After bulging or shrinking or the coordinated deformation of the two, the radial dimensional accuracy is controlled, but there will be unevenness in the height direction and even the risk of local material shortage. Currently, there are relatively few processes for coordinated radial and axial correction.

[0097] The method and device provided in this embodiment have the following beneficial effects:

[0098] 1. The invention adopts the scheme without the need for a press. By adjusting the movement of the inner and outer drive blocks and the movement of the top pressure assembly by the driving part, four deformation modes can be realized, namely, inner diameter expansion only, outer diameter contraction only, inner diameter expansion and outer diameter contraction at the same time, and radial-axial coordinated deformation of the inner and outer diameters and end faces of the ring. It has multiple functions, high flexibility and high efficiency.

[0099] 2. The final ring obtained by adopting the invention scheme has uniform wall thickness, good inner and outer diameter roundness, and flat end face. It can even obtain end face features with different shapes and sizes. For example, using a ring pressure plate with features on the lower end face, the dimensional accuracy in the radial and axial directions is high and the deformation is more uniform.

[0100] 3. With the invention, the drive unit can directly drive the radial movement of the inner diameter bulging and outer diameter shrinking dies, with high transmission efficiency and energy utilization, which greatly reduces the waste of resources and energy and manufacturing costs caused by die wear, short effective stroke after conversion, and short service life caused by the traditional wedge mechanism. And under the same radial effective stroke, the overall size of the equipment of this solution is greatly reduced and the structure is simplified.

[0101] 4. Adopting the invention scheme, for rings with smaller inner diameters, the driving block with an L-shaped cross section has a longer radial distance when subjected to force during inner diameter bulging, and the force is close to the cantilever structure, resulting in low force transmission efficiency and service life of the driving block. A new external direct drive + internal traditional inclined wedge composite drive method is adopted, and the vertical movement of the inner punch can be converted into horizontal movement through the inclined wedge mechanism, thereby assisting in pushing the inner diameter bulging die driving block, improving the equipment stability and service life, as well as the calibration efficiency. At the same time, the existence of the inner punch can also provide a limit function for the inner diameter bulging die.

[0102] 5. In the inclined wedge mechanism of the traditional bulging machine, the displacement of each driving block is the same. In the bulging / shrinking device provided by the invention, each is an independent servo drive system, which can individually control the radial displacement of a specific deformation die module, thereby obtaining a reasonable deformation amount in different areas.

[0103] Embodiment 1:

[0104] Inner diameter bulging:

[0105] The following is a specific embodiment of the present invention using TC4 titanium alloy (target size φ760mm×φ700mm×200mm) as an example:

[0106] (1) Step 1: The TC4 titanium alloy ring forging obtained by ring rolling is heated to 830° C. and placed between the inner driving block 4 and the outer driving block 5.

[0107] (2) Step 2: Start the driving unit 6, and drive the inner driving block 4 to make radial horizontal movement through the radial screw 61, with a speed of 1 mm / s. The inner driving block 4 squeezes the circumferential surface of the inner diameter of the ring member 9 to expand the inner diameter of the ring member 9, i.e., bulge, with a deformation of 1.2%.

[0108] (3) Step 3: Drive the inner drive block 4 to reset, control the rotation of the rotating screw, and the circumferential surface of the rotating screw contacts the lower end surface of the ring member 9, driving the ring member 9 to rotate around its rotation center axis by a certain angle of 15° through friction.

[0109] (4) Step 4: Repeat steps 2 and 3 8 times to ensure that the annular member 9 is uniformly deformed.

[0110] (5) Step 5: After the deformation is completed, the mold is reset and the ring part 9 is taken out, and the inner diameter roundness is good.

[0111] Embodiment 2:

[0112] Outer diameter shrinkage:

[0113] The specific implementation of the present invention is described below by taking TC4 titanium alloy (target size φ760mm×φ700mm×200mm) as an example.

[0114] (1) Step 1: The TC4 titanium alloy ring forging obtained by ring rolling is heated to 835° C. and placed between the inner driving block 4 and the outer driving block 5.

[0115] (2) Step 2: Start the driving unit 6, and drive the outer driving block 5 to make radial horizontal movement through the radial lead screw 61, with a speed of 1.2 mm / s. The outer driving block 5 squeezes the circumferential surface of the outer diameter of the ring member 9 to reduce the outer diameter of the ring member 9, i.e., reduce the diameter, and the deformation amount is 1.6%

[0116] (3) Step 3: Drive the outer drive block 5 to reset, control the rotation of the rotating screw, and the circumferential surface of the rotating screw contacts the lower end surface of the ring member 9, and the friction force drives the ring member 9 to rotate around its rotation center axis by a certain angle, and the rotation angle is 12°.

[0117] (4) Step 4: Repeat steps 2 and 3 six times to ensure that the annular member 9 is uniformly deformed.

[0118] (5) Step 5: After the deformation is completed, the mold is reset and the ring 9 is taken out, and the outer diameter roundness is good.

[0119] Embodiment 3:

[0120] Inner diameter expansion + outer diameter shrinkage:

[0121] The specific implementation of the present invention is described below by taking TC4 titanium alloy (target size φ760mm×φ700mm×200mm) as an example.

[0122] (1) Step 1: The TC4 titanium alloy ring forging obtained by ring rolling is heated to 840° C. and placed between the inner driving block 4 and the outer driving block 5.

[0123] (2) Step 2: Start the driving unit 6, and drive the inner driving block 4 to make radial horizontal movement through the radial screw 61, with a speed of 1 mm / s. The inner driving block 4 squeezes the circumferential surface of the inner diameter of the ring member 9 to expand the inner diameter of the ring member 9, i.e., bulge, with a deformation of 1.2%.

[0124] (3) Step 3: Start the driving unit 6, and drive the inner driving block 4 to make radial horizontal movement through the radial lead screw 61, with a speed of 1.2 mm / s, and the inner diameter of the ring member 9 is expanded by the inner driving block 4 squeezing the circumferential surface of the inner diameter of the ring member 9, i.e., bulging, with a deformation amount of 1.6%. (The order of steps 2 and 3 can be interchanged)

[0125] (4) Step 4: The motor is reversed to reset the inner drive block 4 and the outer drive block 5 respectively, and then the rotating screw is controlled to rotate. The circumferential surface of the rotating screw contacts the lower end surface of the ring member 9, and the friction force drives the ring member 9 to rotate a certain angle around its central axis of rotation. The rotation angle is 10°.

[0126] (5) Step 5: Repeat steps 2, 3, and 4 five times to ensure that the annular member 9 is uniformly deformed.

[0127] (6) Step 6: After the deformation is completed, the mold is reset and the ring part 9 is taken out. The roundness of the inner diameter and the outer diameter is good and the dimensional accuracy is high.

[0128] Embodiment 4:

[0129] Inner diameter bulging + outer diameter shrinkage + end face deformation:

[0130] The specific implementation of the present invention is described below by taking TC4 titanium alloy (target size φ760mm×φ700mm×200mm) as an example.

[0131] (1) Step 1: The TC4 titanium alloy ring forging obtained by ring rolling is heated to 845° C. and placed between the inner driving block 4 and the outer driving block 5.

[0132] (2) Step 2: Start the driving unit 6, and drive the inner driving block 4 to make radial horizontal movement through the radial screw 61, with a speed of 1 mm / s. The inner driving block 4 squeezes the circumferential surface of the inner diameter of the ring member 9 to expand the inner diameter of the ring member 9, i.e., bulge, with a deformation of 1.2%.

[0133] (3) Step 3: Start the driving unit 6, and drive the inner driving block 4 to make radial horizontal movement through the radial lead screw 61, with a speed of 1.2 mm / s, and the inner diameter of the ring member 9 is expanded by the inner driving block 4 squeezing the circumferential surface of the inner diameter of the ring member 9, i.e., bulging, with a deformation amount of 1.6%. (The order of steps 2 and 3 can be interchanged)

[0134] (4) Step 4: The motor is reversed to reset the inner drive block 4 and the outer drive block 5 respectively, and then the rotating screw is controlled to rotate. The circumferential surface of the rotating screw contacts the lower end surface of the ring member 9, and the friction force drives the ring member 9 to rotate a certain angle around its central axis of rotation. The rotation angle is 10°.

[0135] (5) Step 5: Repeat steps 2, 3, and 4 five times to ensure that the annular member 9 is uniformly deformed.

[0136] (6) Step 6: Keep the inner driving block 4 and the outer driving block 5 in the loading state in steps 2 and 3, start the top pressing assembly 8, and squeeze the end surface of the annular member 9 through the annular pressing plate 83 to achieve deformation of the annular member 9 in the height direction.

[0137] (7) Step 7: After the deformation is completed, the mold is reset and the ring part 9 is taken out. The roundness of the inner diameter and the outer diameter is good, the end surface is flat, and the dimensional accuracy is high.

[0138] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0139] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for controlling the radial and axial dimensions of a ring, characterized in that: Specifically, it includes the following modes and corresponding methods: Inner diameter bulging mode: Repeat the inner expansion operation and rotation operation of the ring part until the inner expansion operation covers the entire inner wall surface of the ring part and the bulging requirements are met; Outer diameter contraction mode: Repeat the outer extrusion operation and rotation operation of the ring part until the outer extrusion operation covers the entire outer wall surface of the ring part and the outer diameter contraction requirement is met; Inner diameter expansion and outer diameter contraction mode: the deformation operation and rotation operation of the ring part are repeated, and the deformation operation includes inner expansion operation and outer extrusion operation, until the deformation operation covers the entire outer wall surface of the ring part and the deformation requirements are met; Inner diameter bulging, outer diameter shrinkage and end face deformation mode: the deformation operation and rotation operation of the ring are repeatedly performed, and the deformation operation includes inner expansion operation and outer extrusion operation. After the deformation operation covers the entire outer wall surface of the ring and meets the deformation requirements, the end face deformation extrusion operation is performed.

2. A ring axial dimension control method according to claim 1, characterized in that: The number of repeated operations in the above mode is 3 to 10 times.

3. A ring axial dimension control method according to claim 1, characterized in that: The single rotation angle of the rotation operation in the above modes is between 5° and 45°.

4. A method for controlling the radial and axial dimensions of a ring according to claim 3, characterized in that: The single rotation angle is 5°, 10°, 15°, 20° or 30°.

5. A ring axial dimension control method according to claim 1, characterized in that: In the inner diameter expansion and outer diameter contraction mode, the order of the inner expansion operation and the outer extrusion operation in the deformation operation can be adjusted and changed according to the processing requirements.

6. A method for controlling the radial and axial dimensions of a ring according to claim 1, characterized in that: In the inner diameter bulging, outer diameter shrinking and end face deformation mode: the end face deformation extrusion operation performs stamping processing on the end face of the ring part into a corresponding shape.

7. A ring diameter and axial dimension control method according to claim 1, characterized in that: The machining deformation of the ring part is 0.5% to 3%.

8. A ring axial dimension control method according to claim 1, characterized in that: The ring-shaped part is a metal part, and the ring-shaped part is heated to above 800° C. and then the processing operation in the above mode is performed.

9. A method for controlling the radial and axial dimensions of a ring according to claim 1, characterized in that: The deformation operation of the ring part is realized by linearly moving the mold.

10. A method for controlling the radial and axial dimensions of a ring according to claim 9, characterized in that: The linear moving speed of the linear moving mold is not greater than 4 mm / s.

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