Spinning roller and method for spinning flaring of a rotary body inner cavity

Abstract

The application discloses a spinning roller for spinning and expanding a narrow cavity of a rotary body, which comprises an expanding part and a mounting rod. The expanding part is used for extending into the narrow cavity of the rotary body and extruding the opening of the mounting edge. When the expanding part extrudes the mounting edge in the initial state, the contact point between the expanding part and the mounting edge is the positioning point. The first end of the mounting rod is connected with the expanding part, and the second end of the mounting rod is used for being connected with a machine tool. The mounting rod is moved by the machine tool to push the expanding part to move axially by an axial cutting distance S so that the expanding part abuts against the opening of the mounting edge. The axial cutting distance S is the axial distance from the end face of the opening of the mounting edge to the positioning point when the expanding part is in contact with the end face of the rotary body. The mounting rod is moved radially by the machine tool to push the expanding part to move by a radial cutting distance X so that the opening on the mounting edge is turned to be buckled on the convex on the transition section. The radial cutting distance X is the radial moving distance of the inner circular edge of the opening of the mounting edge from the initial state before the expanding to the designed state after the expanding.

Description

Technical Field

[0001] This invention relates to the field of engine machining technology, and in particular, to a spinning roller for spinning and flaring the internal cavity of a rotating body. Furthermore, this invention also relates to a flaring method comprising the aforementioned spinning roller for spinning and flaring the internal cavity of a rotating body. Background Technology

[0002] like Figure 1 The diagram shows a schematic of the structure of the engine rotating body 100. The rotating body 100 includes a transition section 102 and a mounting edge 101. To prevent the mounting edge 101 from falling off the transition section 102 during operation, the mounting edge 101 needs to be flared. Specifically, the opening on the mounting edge 101 is turned outward in a radial direction to engage with the protrusion 103 on the transition section 102. The part that needs to be flared is located in the inner cavity of the engine. The inner cavity of the engine is a narrow space. Because existing flaring and spinning technologies usually require an open operating space for observation and operation, the existing spinning wheels used for spinning are usually difficult to extend into the inner cavity of the engine, making it difficult to perform spinning and flaring operations in the narrow inner cavity space. Summary of the Invention

[0003] This invention provides a spinning roller and a flaring method for spinning and flaring parts with narrow internal cavities, in order to solve the technical problem of how to spin and flare parts with narrow internal cavities.

[0004] According to one aspect of the present invention, a spinning roller is provided for spinning and flaring an opening of a mounting edge located in a narrow inner cavity of a rotating body, so that the opening on the mounting edge is radially outwardly flipped to engage a protrusion on a transition section in the inner cavity of the rotating body. The roller includes a flaring member and a mounting rod. The flaring member is used to extend into the narrow inner cavity of the rotating body and press against the opening of the mounting edge. In the initial state of pressing against the mounting edge, the contact point between the flaring member and the mounting edge is a positioning point. A first end of the mounting rod is connected to the flaring member, and a second end of the mounting rod is used to connect to a machine tool, through which the machine tool pushes... The mounting rod is moved axially to push the flared part to move axially a distance S so that the flared part abuts against the opening of the mounting edge. The axial distance S is the axial distance from the end face of the opening of the mounting edge to the positioning point when the flared part is in contact with and aligned with the end face of the rotating body. The mounting rod is moved radially by the machine tool to push the flared part to move radially a distance X so that the opening on the mounting edge is turned outward in the radial direction to engage with the protrusion on the transition section in the inner cavity of the rotating body. The radial distance X is the radial movement distance of the inner circle of the opening of the mounting edge from the initial state before flaring to the design state after flaring.

[0005] Furthermore, the flaring component includes a flaring wheel for pressing the opening of the mounting edge and a rotating shaft coaxially arranged with the flaring wheel. The plane of the first end of the flaring wheel is a tool-setting surface, which is used to face the opening end of the rotating body. The plane of the second end of the flaring wheel is a connecting surface, which is fixedly connected to the rotating shaft. The side wall of the flaring wheel has a first inclined surface that is inclined toward the tool-setting surface. The first inclined surface is used to press the mounting edge from the opening of the mounting edge.

[0006] Furthermore, the sidewall of the flared wheel is provided with a second inclined surface that slopes toward the connecting surface, the second inclined surface being used to avoid the transition section in the inner cavity of the rotating body.

[0007] Furthermore, the mounting rod includes a vertical rod and a horizontal rod, the vertical rod and the horizontal rod are fixedly connected to form an L-shaped rod, the vertical rod is rotatably connected to the flared part through a support assembly, and the vertical rod is fixed relative to the axial direction and radial direction of the flared part. The horizontal rod is parallel to the axis of the rotating shaft, and the horizontal rod is used to connect to the machine tool to push the vertical rod to move axially or radially.

[0008] Furthermore, the support assembly includes a main bearing for rolling support and bearing radial and axial loads, a secondary bearing for rolling support and bearing axial loads, and a locking member threaded onto the rotating shaft. A first bearing seat for mounting the main bearing is provided at one end of the vertical rod near the connecting surface, and a second bearing seat for mounting the secondary bearing is provided at the other end of the vertical rod away from the connecting surface. The inner ring of the main bearing is connected to the rotating shaft and rotates synchronously with the rotating shaft. The outer ring of the main bearing abuts and is fixed to the groove wall of the first bearing seat. The secondary bearing is sleeved on the rotating shaft, and the stationary ring of the secondary bearing is embedded in the second bearing seat. The moving ring of the secondary bearing abuts against the locking member and rotates synchronously with the rotating shaft.

[0009] Furthermore, the locking member includes a locking part and a washer, the washer being located between the locking part and the secondary bearing and serving to protect the secondary bearing.

[0010] Furthermore, the main bearing is a tapered roller bearing, and the secondary bearing is a thrust ball bearing.

[0011] According to another aspect of the present invention, a method for spinning and flaring a rotating internal cavity is also provided, which employs the aforementioned spinning roller for spinning and flaring a rotating internal cavity to spin and flare the rotating internal cavity, comprising the following steps:

[0012] Step S100: Install the rotating body on the chuck or flange of the rotating spindle of the lathe, and use a dial indicator to align the rotating body so that the rotating body and the rotating spindle are coaxial.

[0013] Step S200: Fix the mounting rod to the movable tool post of the lathe, and push the mounting rod to move by the movable tool post so that the tool setting face is in contact with and aligned with the end face of the rotating body. Take the plane where the end face of the rotating body is located at this time as the starting plane for the axial movement of the flaring wheel.

[0014] Step S300: Measure the axial feed distance S of the flaring wheel. The axial feed distance S is the axial distance from the end face of the mounting edge opening to the top of the first inclined surface when the tool face is aligned with the end face of the rotating body. Measure the radial feed distance X of the flaring wheel. The radial feed distance X is the radial movement distance of the inner circle edge of the mounting edge opening from the initial state before flaring to the design state after flaring.

[0015] Step S400: The flaring wheel is moved radially by the tool holder so that it can be fully inserted into the inner cavity of the rotating body; the flaring wheel is moved axially by the tool holder by S; and the flaring wheel is moved radially by the tool holder until it abuts against the opening of the mounting edge.

[0016] Step S500: Start the rotating spindle to make the rotating body rotate. At the same time, drive the flaring wheel to feed radially X through the tool post, so that the opening of the mounting edge flips outward radially under the pressure of the flaring wheel until the opening of the mounting edge engages with the protrusion on the transition section inside the rotating body.

[0017] Further, in step S300, the axial distance from the end face of the mounting edge opening to the end face of the rotating body is measured as L1, the axial distance from the vertex of the first inclined surface to the tool setting surface is measured as L2, and the axial feed distance of the flaring wheel is calculated as S = L1 + L2.

[0018] Further, in step S300, the radius of the inner circle of the opening of the mounting edge 101 is measured as R1, the radius of the inner circle of the opening of the mounting edge 101 when the opening of the mounting edge 101 is flared to the design state is obtained as R2, and the radial cutting distance X of the flaring wheel 201 is calculated as X = R2 - R1.

[0019] The present invention has the following beneficial effects:

[0020] In the spinning roller of this invention for spinning and flaring the inner cavity of a rotating body, the flaring element extends into the inner cavity of the rotating body and abuts against the opening of the mounting edge. The mounting rod is connected to the tool post of a machine tool. The tool post pushes the mounting rod axially to make the flaring element abut against the opening of the mounting edge. The machine tool pushes the mounting rod radially to make the opening of the mounting edge turn radially outward. Because the flaring element can extend into the inner cavity of the rotating body and, under the push of the mounting rod, can squeeze the opening of the mounting edge, the opening of the mounting edge turns radially outward until it engages with the protrusion on the transition section inside the rotating body, thus completing the spinning and flaring of the mounting edge inside the rotating body. In this process, the narrow space of the inner cavity of the rotating body part is flared and flared using the flaring element and the mounting rod.

[0021] In practice, firstly, the rotating body is mounted on the chuck or flange of the lathe's spindle, and a dial indicator is used to align the rotating body so that it is coaxial with the spindle. Next, the mounting rod is fixedly connected to the lathe's movable tool post. The movable tool post pushes the mounting rod to move, aligning the tool setting face with the end face of the rotating body. The plane containing the end face of the rotating body at this point is taken as the starting plane for the axial movement of the flaring wheel. Then, the axial distance from the end face of the mounting edge opening to the end face of the rotating body is measured as L1, and the axial distance from the apex of the first inclined plane to the tool setting face is measured as L2. The axial travel distance of the flaring wheel is calculated as S = L1 + L2. Simultaneously, the radius of the inner circle at the opening of the mounting edge is measured as R. 1. Obtain the radius of the inner circle of the opening of the mounting edge as R2 when it is flared to the design state. Calculate the radial feed distance X of the flaring wheel = R2 - R1. Then, push the flaring wheel radially through the tool holder so that the flaring wheel can be fully inserted into the inner cavity of the rotating body. Push the flaring wheel axially through the tool holder and then push the flaring wheel radially until it abuts against the opening of the mounting edge. Start the rotating spindle to make the rotating body rotate. At the same time, drive the flaring wheel radially through the tool holder to move the radial feed distance X, so that the opening of the mounting edge is radially flipped outward under the extrusion of the flaring wheel until it engages with the protrusion on the transition section of the rotating body, thereby completing the spin flaring of the mounting edge in the inner cavity of the rotating body.

[0022] In summary, the radial dimensions of the combined flared part and mounting rod are both smaller than the diameter of the inner cavity of the rotating body, allowing the flared part and mounting rod to extend into the inner cavity of the rotating body and move along the axis and radial direction within the inner cavity. This enables the flaring and bulging of the narrow space within the inner cavity of the rotating body parts.

[0023] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0025] Figure 1 This is a schematic diagram of the structure of the rotating body according to a preferred embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of the flared part and the rotating body for tool setting according to a preferred embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of the flared part of the preferred embodiment of the present invention, showing the flared part being spun and flared at the mounting edge;

[0028] Figure 4 This is a schematic diagram of the structure of the flared part according to a preferred embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the mounting rod according to a preferred embodiment of the present invention.

[0030] Legend:

[0031] 100. Rotating body; 101. Mounting edge; 102. Transition section; 103. Protrusion;

[0032] 200. Flaring part; 201. Flaring wheel; 202. Tool setting face; 203. Connecting surface; 204. First inclined surface; 205. Second inclined surface; 206. Rotation shaft;

[0033] 300. Mounting rod; 301. Vertical rod; 302. First bearing housing; 303. Second bearing housing; 304. Horizontal rod;

[0034] 400. Main bearing; 401. Secondary bearing; 402. Washer;

[0035] 500. Locking components. Detailed Implementation

[0036] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0037] like Figures 1-3As shown, this embodiment describes a method for flaring the opening of a mounting edge 101 located in the narrow inner cavity of the rotating body 100, so that the opening on the mounting edge 101 is radially outwardly flipped to engage with the protrusion 103 on the transition section 102 in the inner cavity of the rotating body 100. The method includes a flaring member 200 and a mounting rod 300. The flaring member 200 is used to extend into the narrow inner cavity of the rotating body (100) and compress the opening of the mounting edge 101. In the initial state of the flaring member 200 compressing the mounting edge 101, the contact point between the flaring member 200 and the mounting edge 101 is a positioning point. The first end of the mounting rod 300 is rotatably connected to the flaring member 200, and the second end of the mounting rod 300 is used to connect to a machine tool, through which the machine tool pushes the... The mounting rod 300 moves axially to push the flared part 200 to move axially by an axial feed distance S so that the flared part 200 abuts against the opening of the mounting edge 101. The axial feed distance S is the axial distance from the end face of the opening of the mounting edge 101 to the positioning point when the flared part 200 is in contact with and aligned with the end face of the rotating body 100. The machine tool pushes the mounting rod 300 to move radially to push the flared part 200 to move radially by a radial feed distance X so that the opening on the mounting edge 101 flips outward radially to engage with the protrusion 103 on the transition section 102 in the inner cavity of the rotating body 100. The radial feed distance X is the radial movement distance of the inner circle of the opening of the mounting edge 101 from the initial state before flaring to the design state after flaring.

[0038] In this embodiment, the flaring member 200 extends into the inner cavity of the rotating body 100 and abuts against the opening of the mounting edge 101. The mounting rod 300 is used to connect to the tool post of the machine tool. The tool post pushes the mounting rod 300 axially to make the flaring member 200 abut against the opening of the mounting edge 101. The machine tool pushes the mounting rod 300 radially to make the opening of the mounting edge 101 turn outward radially. Since the flaring member 200 can extend into the inner cavity of the rotating body 100 and can squeeze the opening of the mounting edge 101 under the push of the mounting rod 300, the opening of the mounting edge 101 turns outward radially until it engages with the protrusion 103 on the transition section 102 inside the rotating body 100, thereby completing the spinning flaring of the mounting edge 101 inside the rotating body 100. In this process, the flaring member 200 and the mounting rod 300 realize the spinning flaring of the narrow space inside the rotating body 100 part.

[0039] In practice, firstly, the rotating body 100 is mounted on the chuck or flange of the lathe's rotating spindle, and a dial indicator is used to align the rotating body 100 so that it remains coaxial with the rotating spindle. Next, the mounting rod 300 is fixedly connected to the lathe's movable tool post. The movable tool post pushes the mounting rod 300 to move, so that the tool setting face 202 contacts and aligns with the end face of the rotating body 100. The plane containing the end face of the rotating body 100 at this point is taken as the starting plane for the axial movement of the flaring wheel 201. Then, the axial distance L1 from the end face of the opening of the mounting edge 101 to the end face of the rotating body 100 is measured, and the axial distance L2 from the vertex of the first inclined plane 204 to the tool setting face 202 is measured. The flaring wheel 201 is then calculated. The axial cutting distance S of the flaring wheel 201 is S = L1 + L2; then the tool holder pushes the flaring wheel 201 to move radially so that the flaring wheel 201 can be fully inserted into the inner cavity of the rotating body 100. The tool holder pushes the flaring wheel 201 to move axially by S, and the tool holder pushes the flaring wheel 201 to move radially until it abuts against the opening of the mounting edge 101; the rotating spindle is started to make the rotating body 100 rotate, and at the same time the tool holder drives the flaring wheel 201 to advance radially, so that the opening of the mounting edge 101 is turned outward radially under the pressure of the flaring wheel 201 until it engages with the protrusion 103 on the transition section 102 inside the rotating body 100, thereby completing the spin-forming flaring of the mounting edge 101 in the inner cavity of the rotating body 100.

[0040] In summary, the radial dimension of the combined flared part 200 and mounting rod 300 is smaller than the diameter of the inner cavity of the rotating body 100, which allows the flared part 200 and mounting rod 300 to extend into the inner cavity of the rotating body 100 and move along the axis and radial direction within the inner cavity of the rotating body 100, thereby enabling the spin-forming flaring of the narrow space within the inner cavity of the rotating body 100 parts.

[0041] Reference Figure 4 The flaring component 200 includes a flaring wheel 201 for pressing the opening of the mounting edge 101 and a rotating shaft 206 coaxially arranged with the flaring wheel 201. The first end of the flaring wheel 201 has a blade-setting surface 202, which is used to make a blade against the opening end of the rotating body 100. The second end of the flaring wheel 201 has a connecting surface 203, which is fixedly connected to the rotating shaft 206. The side wall of the flaring wheel 201 has a first inclined surface 204 that is inclined toward the blade-setting surface 202. The first inclined surface 204 is used to press the mounting edge 101 from the opening of the mounting edge 101.

[0042] In this embodiment, the flaring component 200 is composed of a flaring wheel 201 and a rotating shaft 206. The flaring wheel 201 and the rotating shaft 206 are coaxially arranged and the rotating shaft 206 is fixedly connected to the flaring wheel 201. The plane of the first end of the flaring wheel 201 is a tool-setting surface 202. The end face of the tool-setting surface 202 is flat and is used to face the opening end of the rotating body 100 to confirm the starting point of the axial movement of the flaring wheel 201. The plane of the second end of the flaring wheel 201 is a connecting surface 203, and the connecting surface 203 is fixedly connected to the rotating shaft 206. The flaring wheel 201 has a first inclined surface 204 on its side wall, which is inclined toward the tool-setting face 202. The first inclined surface 204 is used to press the opening of the mounting edge 101. Specifically, when the first inclined surface 204 is pressed, it abuts against the inner wall of the opening. As the flaring wheel 201 moves radially, the opening of the mounting surface bends along the first inclined surface 204 until it engages with the protrusion 103 on the inner transition section 102 of the rotating body 100. Specifically, the angle between the protrusion 103 on the inner transition section 102 of the rotating body 100 and the abutting surface of the mounting surface opening and the tool-setting face 202 is 30°, so the angle between the first inclined surface 204 and the tool-setting face 202 is 30°.

[0043] Furthermore, the side wall of the flared wheel 201 is provided with a second inclined surface 205 that is inclined toward the connecting surface 203. The second inclined surface 205 is used to avoid the transition section 102 in the inner cavity of the rotating body 100.

[0044] In this embodiment, since the transition section 102 has a certain slope, a second inclined surface 205 is required to avoid the transition section 102 when the flaring wheel 201 presses the opening of the mounting edge 101.

[0045] Reference Figure 5 The mounting rod 300 includes a vertical rod 301 and a horizontal rod 304 fixedly connected to the vertical rod 301. The vertical rod 301 is rotatably connected to the flared part 200 through a support assembly and is fixed relative to the axial direction and radial direction of the flared part 200. The horizontal rod 304 is used to connect to a machine tool to push the vertical rod 301 to move axially or radially.

[0046] In this embodiment, the vertical rod 301 and the horizontal rod 304 are connected in an L-shape. The vertical rod 301 is connected to the rotating shaft 206 through a support assembly, so that the vertical rod 301 is fixed axially and radially relative to the flared part 200. This allows the flared part 200 to move axially or radially when the horizontal rod 304 pushes the vertical rod 301, thereby causing the flared part 200 to move axially or radially simultaneously, and thus flaring is performed by the flared part 200. At the same time, the flared part 200 is rotatably connected to the vertical rod 301, so that when the rotating body 100 rotates, the flaring wheel 201, which abuts against the mounting edge 101 inside the rotating body 100, can roll simultaneously, reducing the friction between the mounting edge 101 and the flaring wheel 201, thereby avoiding wear on the mounting edge 101 during flaring due to excessive friction.

[0047] Furthermore, the support assembly includes a main bearing 400 for rolling support and bearing radial and axial loads, a secondary bearing 401 for rolling support and bearing axial loads, and a locking member 500 threadedly connected to the rotating shaft 206. A first bearing seat 302 for mounting the main bearing 400 is provided at one end of the vertical rod 301 near the connecting surface 203, and a second bearing seat 303 for mounting the secondary bearing 401 is provided at the other end of the vertical rod 301 away from the connecting surface 203. The inner ring of the main bearing 400 is connected to the rotating shaft 206 and rotates synchronously with the rotating shaft 206. The outer ring of the main bearing 400 abuts against and is fixed to the groove wall of the first bearing seat 302. The secondary bearing 401 is sleeved on the rotating shaft 206, and the stationary ring of the secondary bearing 401 is embedded in the second bearing seat 303. The moving ring of the secondary bearing 401 abuts against the locking member 500 and rotates synchronously with the rotating shaft 206.

[0048] In this embodiment, the main bearing 400 is a tapered roller bearing capable of simultaneously bearing large axial and radial loads, providing a stable working environment for the first inclined surface 204 to flare the mounting edge 101. The secondary bearing 401 uses a thrust ball bearing in conjunction with a locking element 500 to adjust the axial clearance between the vertical rod 301 and the flaring wheel 201, preventing the flaring wheel 201 from seizing and becoming difficult to rotate relative to the vertical rod 301. The locking element 500 is a locking nut used to connect the vertical rod 301 to the flaring element 200. The outer ring of the main bearing 400 is fixed to the vertical rod 301, and the inner ring of the main bearing 400 is connected to the rotating shaft 206 and rotates synchronously with the rotating shaft 206. The stationary ring of the secondary bearing 401 is embedded in the second bearing seat 303 and fixedly connected to the vertical rod 301. The moving ring of the secondary bearing 401 abuts against the locking element 500 and rotates synchronously with the rotating shaft 206, thereby allowing the flaring wheel 201 to rotate relative to the vertical rod 301. Initially, the inner cavity of the part is perpendicular to the flared wheel 201, at which point the flared wheel 201 only bears radial force. As the opening of the mounting edge 101 flares outward, the opening of the mounting edge 101 contacts the first inclined surface 204, at which point the opening of the mounting edge 101 is subjected to both radial and axial forces. As the flip angle of the opening of the mounting edge 101 gradually increases, the axial force increases rapidly. The tapered roller bearing can simultaneously withstand large loads of axial and radial forces, ensuring stable rotation of the roller.

[0049] Furthermore, a washer 402 for protecting the secondary bearing 401 is provided between the locking member 500 and the secondary bearing 401. In this embodiment, the washer 402 provided between the locking member 500 and the secondary bearing 401 can prevent the locking member 500 from pressing against the rotating ring of the secondary bearing 401 when it is rotated, thereby preventing wear on the secondary bearing 401.

[0050] Furthermore, the main bearing 400 is a tapered roller bearing, and the secondary bearing 401 is a thrust ball bearing. In this embodiment, the tapered roller bearing of the main bearing 400 can simultaneously bear large axial and radial loads, providing a stable working environment for the first inclined surface 204 to flare the mounting edge 101. The secondary bearing 401, using a thrust ball bearing in conjunction with the locking element 500, can adjust the axial clearance between the vertical rod 301 and the flaring wheel 201, preventing the flaring wheel 201 from seizing and becoming difficult to rotate relative to the vertical rod 301.

[0051] According to another aspect of the present invention, a method for spinning and flaring the inner cavity of a rotating body 100 is also provided, which employs the aforementioned spinning roller for spinning and flaring the inner cavity of the rotating body 100 to spin and flare the inner cavity of the rotating body 100, comprising the following steps:

[0052] Step S100: Install the rotating body 100 on the chuck or flange of the rotating spindle of the lathe, and use a dial indicator to align the rotating body 100 so that the rotating body 100 is coaxial with the rotating spindle.

[0053] Step S200: Fix the mounting rod 300 to the movable tool post of the lathe, and push the mounting rod 300 to move by the movable tool post so that the tool setting face 202 contacts and aligns with the end face of the rotating body 100. Take the plane where the end face of the rotating body 100 is located at this time as the starting plane for the axial movement of the flaring wheel 201.

[0054] Step S300: Measure the axial travel distance S of the flaring wheel 201. The axial travel distance S is the axial distance from the end face of the mounting edge 101 opening to the vertex of the first inclined surface 204 when the tool setting face 202 is in contact with and aligned with the end face of the rotating body 100. Measure the radial travel distance X of the flaring wheel 201. The radial travel distance X is the radial movement distance of the inner circle of the opening of the mounting edge 101 from the initial state before flaring to the design state after flaring.

[0055] In step S400, the flaring wheel 201 is pushed radially by the tool holder so that the flaring wheel 201 can be fully inserted into the inner cavity of the rotating body 100. The flaring wheel 201 is pushed axially by the tool holder and then pushed radially by the tool holder until it abuts against the opening of the mounting edge 101.

[0056] In step S500, the main spindle is started to rotate the rotating body 100. At the same time, the flaring wheel 201 is driven to feed radially X through the tool holder, so that the opening of the mounting edge 101 is squeezed by the flaring wheel 201 and flipped outward radially until the opening of the mounting edge 101 engages with the protrusion 103 on the transition section 102 inside the rotating body 100.

[0057] In this embodiment, for step S100, the rotating body 100 is installed on the chuck or flange on the rotating spindle of the lathe. During installation, the rotating body 100 is aligned with a dial indicator so that the rotating body 100 remains coaxial with the rotating spindle after installation.

[0058] For step S200, after the flaring wheel 201 is aligned with the end face of the rotating body 100, the plane where the end face of the rotating body 100 is located is taken as the starting plane for the axial movement of the flaring wheel 201. This facilitates the flaring wheel 201 to blindly rotate the mounting edge 101 in the future. Specifically, the axial movement distance of the flaring wheel 201 of the tool holder is set to ensure that the top of the first inclined surface 204 moves axially to be flush with the end face of the mounting edge 101.

[0059] For step S300, measure the axial distance L1 from the end face of the opening of the mounting edge 101 to the end face of the rotating body 100, measure the axial distance L2 from the vertex of the first inclined surface 204 to the tool setting surface 202, and calculate the axial cutting distance S = L1 + L2 of the flaring wheel 201.

[0060] For step S300, the radius of the inner circle of the opening of the mounting edge 101 is measured as R1, the radius of the inner circle of the opening of the mounting edge 101 when the opening of the mounting edge 101 is flared to the design state is obtained as R2, and the radial feed distance X of the flaring wheel 201 is calculated as X = R2 - R1.

[0061] In summary, by aligning the tool setting face 202 with the end face of the rotating body 100 through tool setting, the plane containing the end face of the rotating body 100 is confirmed as the starting plane for the axial movement of the flaring wheel 201. Then, the axial distance and radial distance of the flaring wheel 201 are calculated using the methods in steps S300 and S500. This allows the tool path of the flaring wheel 201 to be set by the tool holder, thus enabling the blind rotation of the flaring wheel 201.

[0062] Further, in step S300, the axial distance from the end face of the opening of the mounting edge 101 to the end face of the rotating body 100 is measured as L1, the axial distance from the vertex of the first inclined surface 204 to the tool setting surface 202 is measured as L2, and the axial cutting distance S of the flaring wheel 201 is calculated as S = L1 + L2.

[0063] Further, in step S300, the radius of the inner circle of the opening of the mounting edge 101 is measured as R1, the radius of the inner circle of the opening of the mounting edge 101 when the opening of the mounting edge 101 is flared to the design state is obtained as R2, and the radial cutting distance X of the flaring wheel 201 is calculated as X = R2 - R1.

[0064] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for spinning and flaring the cavity of a rotating body, characterized in that, A spinning roller is used to flare the opening of the mounting edge (101) located in the narrow inner cavity of the rotating body (100), so that the opening on the mounting edge (101) is turned radially outward to engage with the protrusion (103) on the transition section (102) in the inner cavity of the rotating body (100). The spinning roller includes a flaring element (200) and a mounting rod (300). The flared part (200) is used to extend into the narrow inner cavity of the rotating body (100) and squeeze the opening of the mounting edge (101). When the flared part (200) squeezes the mounting edge (101) in the initial state, the contact point between the flared part (200) and the mounting edge (101) is the positioning point. The first end of the mounting rod (300) is rotatably connected to the flared part (200), and the second end of the mounting rod (300) is used for connection with the machine tool. The flaring component (200) includes a flaring wheel (201) for pressing the opening of the mounting edge (101) and a rotating shaft (206) coaxially arranged with the flaring wheel (201). The first end of the flaring wheel (201) has a facet (202) for facing the opening end of the rotating body (100). The second end of the flaring wheel (201) has a connecting surface (203) which is connected to the rotating shaft. (206) Fixed connection, the side wall of the flaring wheel (201) is provided with a first inclined surface (204) inclined toward the blade-setting surface (202), the first inclined surface (204) is used to squeeze the mounting edge (101) from the opening of the mounting edge, the side wall of the flaring wheel (201) is provided with a second inclined surface (205) inclined toward the connecting surface (203), the second inclined surface (205) is used to avoid the transition section (102) in the inner cavity of the rotating body (100), The method for flaring the internal cavity of a rotating body includes the following steps: Step S100: Install the rotating body (100) on the chuck or flange of the rotating spindle of the lathe, and use a dial indicator to align the rotating body (100) so that the rotating body (100) and the rotating spindle are coaxial. Step S200: Fix the mounting rod (300) to the movable tool post of the lathe, and push the mounting rod (300) to move by the movable tool post so that the tool setting face (202) is in contact with the end face of the rotating body (100) and the plane where the end face of the rotating body (100) is located at this time is taken as the starting plane for the axial movement of the flaring wheel (201). Step S300: Measure the axial feed distance S of the flaring wheel (201). The axial feed distance S is the axial distance from the end face of the mounting edge (101) opening to the vertex of the first inclined surface (204) when the tool setting face (202) and the end face of the rotating body (100) are in contact and aligned. Measure the radial feed distance X of the flaring wheel (201). The radial feed distance X is the radial movement distance of the inner circle edge of the mounting edge (101) opening from the initial state before flaring to the design state after flaring. In step S400, the flaring wheel (201) is pushed radially by the tool holder so that the flaring wheel (201) can be fully inserted into the inner cavity of the rotating body (100), the flaring wheel (201) is pushed axially by the tool holder by the tool holder by the tool holder by the tool holder by the tool holder until it abuts against the opening of the mounting edge (101); Step S500: Start the rotating spindle to make the rotating body (100) rotate. At the same time, drive the flaring wheel (201) to feed radially X through the tool holder, so that the opening of the mounting edge (101) is squeezed by the flaring wheel (201) and flipped outward radially until the opening of the mounting edge (101) engages with the protrusion (103) on the transition section (102) inside the rotating body (100).

2. The method for spinning and flaring the internal cavity of a rotating body according to claim 1, characterized in that, In step S300, the axial distance from the end face of the opening of the mounting edge (101) to the end face of the rotating body (100) is measured as L1, the axial distance from the vertex of the first inclined plane (204) to the tool setting face (202) is measured as L2, and the axial cutting distance S of the flaring wheel (201) is calculated as S=L1+L2.

3. The method for spinning and flaring the internal cavity of a rotating body according to claim 2, characterized in that, In step S300, the radius of the inner circle at the opening of the mounting edge (101) is measured as R1, the radius of the inner circle at the opening of the mounting edge (101) when the opening of the mounting edge (101) is widened to the design state is obtained as R2, and the radial cutting distance X of the flaring wheel (201) is calculated as X=R2-R1.

4. The method for spinning and flaring the internal cavity of a rotating body according to claim 1, characterized in that, The mounting rod (300) includes a vertical rod (301) and a horizontal rod (304). The vertical rod (301) is fixedly connected to the horizontal rod (304) to form an L-shaped rod. The vertical rod (301) is rotatably connected to the flared part (200) through a support assembly. The vertical rod (301) is fixed relative to the axial direction and radial direction of the flared part (200). The horizontal rod (304) is parallel to the axis of the rotating shaft (206). The horizontal rod (304) is used to connect to a machine tool to push the vertical rod (301) to move axially or radially.

5. The spinning flaring method for rotating internal cavities according to claim 4, characterized in that, The support assembly includes a main bearing (400) for rolling support and bearing radial and axial loads, a secondary bearing (401) for rolling support and bearing axial loads, and a locking member (500) threaded onto the rotating shaft (206). A first bearing seat (302) for mounting the main bearing (400) is provided at one end of the vertical rod (301) near the connecting surface (203), and a second bearing seat (502) for mounting the secondary bearing (401) is provided at the other end of the vertical rod (301) away from the connecting surface (203). The bearing housing (303) has an inner ring of the main bearing (400) connected to the rotating shaft (206) and rotating synchronously with the rotating shaft (206). The outer ring of the main bearing (400) is fixed to the groove wall of the first bearing housing (302). The auxiliary bearing (401) is sleeved on the rotating shaft (206) and the stationary ring of the auxiliary bearing (401) is embedded in the second bearing housing (303). The moving ring of the auxiliary bearing (401) abuts against the locking member (500) and rotates synchronously with the rotating shaft (206).

6. The method for spinning and flaring the internal cavity of a rotating body according to claim 5, characterized in that, The locking member (500) includes a locking part and a washer (402), the washer (402) being located between the locking part and the secondary bearing (401) and used to protect the secondary bearing (401).

7. The method for spinning and flaring the internal cavity of a rotating body according to claim 5, characterized in that, The main bearing (400) is a tapered roller bearing, and the secondary bearing (401) is a thrust ball bearing.

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