JP6956649B2 - Processing method and processing equipment - Google Patents

Description

The present invention relates to a processing method and a processing apparatus.

A spinning processing method is known in which a tubular member to be machined is rotated and a roller is pressed against the member to form a cylinder. Patent Documents 1 and 2 disclose a spinning processing device for spinning a material by sandwiching a material with a pair of rollers as a spinning processing device capable of preventing defects in the product shape and manufacturing a high-precision product at low cost. There is.

Patent Document 1 measures the shape of a member to be processed by an optical profile measuring device, and corrects the trajectories of the pair of rollers so that the distance between the pair of rollers becomes a value corresponding to the target shape of the member to be processed. A spinning machine equipped with a control unit that drives a pair of rollers in a corrected trajectory is disclosed.

In Patent Document 2, a compressive force is applied to the open end of a cylindrical workpiece from its outer peripheral surface in the plate thickness direction along its circumference to make the cylindrical workpiece in the plate thickness direction. Disclosed is a spinning processing apparatus that plastically deforms in the circumferential direction and extends the length of the band-shaped range of the open end of the member to be machined in the circumferential direction. As a result, it is possible to correct the path length and roundness in the circumferential direction in the vicinity of the open end portion of the cylindrical member to be processed.

Japanese Unexamined Patent Publication No. 2015-221443 Japanese Unexamined Patent Publication No. 2016-168620

When machining a member to be machined with a spinning machine, when a pair of rollers are separated from the member to be machined, a phenomenon called springback occurs in which the deformation applied to the member to be machined is slightly restored. As a result, when a force is applied to the member to be machined by the pair of rollers, even if the member to be machined is formed into a target shape, when the pair of rollers are separated from the member to be machined, the shape of the member to be machined is formed. There is a problem that the shape is different from the target shape.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a processing method and a processing apparatus for processing a member to be processed into a target shape.

In order to achieve the above object, in the processing method according to the present invention, a tubular workpiece mounted on a jig is rotated, and an end portion of the workpiece is sandwiched between a molding roller and a molding receiving roller. It has a first bent portion and a second bent portion that are bent in different directions, an enlarged diameter portion is arranged between the first and second bent portions, and a non-processed portion is formed in the first bent portion. Is extended, and a face plate portion is extended to the second bent portion, which is a processing method for processing into a Z-shaped cross section, which includes a bending process, an ironing process, and a finishing process. Be prepared. The molding receiving roller has a holding portion that faces the jig and sandwiches the member to be processed, and a forming portion that determines the molding shape of the member to be processed. In the bending step, the first bent portion is bent by applying a force to the end portion of the member to be processed by the forming roller while the member to be processed is sandwiched between the jig and the holding portion of the roller for receiving molding. In the ironing process, the forming roller is pressed against the member to be processed in which the first bent portion is bent, and the face plate portion is formed while being squeezed between the forming portion and the forming portion provided on the forming receiving roller. A face plate portion, a second bent portion, and a diameter-expanded portion are formed. In the finishing process, the diameter-expanded portion of the member to be processed in which the face plate portion, the second bent portion, and the diameter-expanded portion are formed is pressed by the forming roller.

According to the present invention, deformation due to springback can be suppressed by performing a finishing process of pressing the enlarged diameter portion with the forming roller. As a result, the member to be machined can be machined into a target shape.

(A) is a diagram for explaining the processing method according to the first embodiment of the present invention, and (b) is a cross-sectional view for explaining the processing method according to the first embodiment of the present invention. (A) is a view showing a molded body molded by the processing method according to the first embodiment of the present invention, and (b) is a cross-sectional view taken along the line AA of FIG. 2 (a). The figure which shows the processing apparatus which concerns on Embodiment 1 of this invention. (A) is a view of the gripping jig according to the first embodiment of the present invention from an axial direction, and (b) is a cross-sectional view taken along the line BB of FIG. 4 (a). The figure which shows the tailing unit which concerns on Embodiment 1 of this invention. The figure which shows the roller unit which concerns on Embodiment 1 of this invention. The figure which shows the roller unit for molding which concerns on Embodiment 1 of this invention. The figure which shows the roller unit for molding receiving which concerns on Embodiment 1 of this invention. The figure which shows the molding receiving roller which concerns on Embodiment 1 of this invention. An enlarged cross-sectional view of the molding receiving roller according to the first embodiment of the present invention cut along a surface including a rotation shaft. The figure which shows the molding roller and the molding receiving roller which concerns on Embodiment 1 of this invention. The figure explaining the processing method which concerns on Embodiment 1 of this invention. The figure explaining the processing method which concerns on Embodiment 1 of this invention. The figure explaining the processing method which concerns on Embodiment 1 of this invention. The figure explaining the processing method which concerns on a comparative example The figure explaining the processing method which concerns on a comparative example The figure explaining the processing method which concerns on the modification of this invention The figure explaining the processing method which concerns on the modification of this invention

(Embodiment)
Hereinafter, a processing method and a processing apparatus according to a mode for carrying out the present invention will be described with reference to the drawings.

In the processing method according to the present embodiment, as shown in FIGS. 1 (a) and 1 (b), the machined member 101 is rotated with the cylindrical machined member 101 attached to the inner jig 203. The molding roller 201 arranged on the inner surface of the member 101 to be processed and the molding receiving roller 202 arranged on the outer surface sandwich the member 101 to be processed for molding. This processing method is generally referred to as a spinning processing method. The member 101 to be processed may be made of a plastically deformable material, and is preferably made of ferritic stainless steel, austenitic stainless steel, or general mild steel. The thickness of the member 101 to be processed may be any thickness as long as it can be formed by being sandwiched between the forming roller 201 and the forming receiving roller 202, and is preferably 0.5 to 2 mm. In the present embodiment, as shown in FIGS. 2A and 2B, the peripheral edge of the open end of the member 101 to be processed is processed into a Z-shaped cross section.

The peripheral edge of the open end of the member 101 to be machined into a Z-shaped cross section has a first bent portion 102 and a second bent portion 103 bent in different directions, and is between the first and second bent portions. A diameter-expanded portion 104 is arranged in the first bent portion 102, a non-processed portion is extended, and a face plate portion 105 is extended to the second bent portion 103.

In the processing apparatus 200 according to the present embodiment, as shown in FIG. 3, the forming roller 201 in contact with the inner surface of the processed member 101, the forming receiving roller 202 in contact with the outer surface of the processed member 101, and the processed member 101 are The inner jig 203 and the gripping jig 204 to be mounted, the rotary spindle 205 and the rotary driven shaft 206 connected to the inner jig 203 and the gripping jig 204, the motor 207 for rotating the rotary spindle 205, and the member to be machined. It includes an end face stopper 208 for positioning the 101, and a control unit 220 for controlling the movements of the molding roller 201 and the molding receiving roller 202. The inner jig 203, the gripping jig 204, the rotary spindle 205, the rotary driven shaft 206, and the motor 207 function as a rotation mechanism.

To facilitate understanding, a Cartesian coordinate system is set in which the axial direction of the member 101 to be machined is the x-axis direction, the vertically upward direction is the y-axis direction, and the x-axis direction and the direction perpendicular to the y-axis direction are the z-axis directions. And refer to it as appropriate.

The forming roller 201 is movable in the x-axis direction by the x-axis rail 209, and is movable in the y-axis direction by the y-axis rail 210. The molding receiving roller 202 can be moved in the x-axis direction by the x-axis rail 209, and can be moved in the y-axis direction by the y-axis rail 211. The forming receiving roller 202, the forming roller 201, the inner jig 203, and the gripping jig 204 can process both open ends of the workpiece 101 at the same time, and are opposed to each other in the axial direction of the workpiece 101. They are arranged in pairs. The member 101 to be machined is attached to the inner jig 203 and the gripping jig 204, and rotates by the rotation of the rotation spindle 205. The rotation axis of the rotation driven shaft 206 is arranged on the same axis AX as the rotation axis of the rotation spindle 205. The motor 207 and the rotary spindle 205 are connected via a speed reduction mechanism 212 having a power transmission function including a belt or a gear.

The inner jig 203 has a disk-like shape, and the outer peripheral portion is inscribed in the inner circumference of the member 101 to be processed. As shown in FIGS. 4A and 4B, the gripping jig 204 includes a fan-shaped gripping block 301 in contact with the inner surface of the member to be machined 101, a support portion 302 for supporting the gripping block 301, and a support portion. It has a wedge-shaped driven portion 303 installed at the end of 302. The support portion 302 of the gripping jig 204 is movable in the radial direction with respect to the member to be machined 101. The rotary spindle 205 and the rotary driven shaft 206 are provided with a conical extrusion member 304, and when the extrusion member 304 is moved in the direction of arrow a in FIG. 4 by a drive unit (not shown), the grip jig 204 is driven. The portion 303 moves in the direction of the arrow b in FIG. 4, and as a result, the gripping block 301 presses the inner peripheral surface of the member to be machined 101, and a frictional force is generated between the inner surface of the member to be machined 101 and the gripping block 301. , The member 101 to be processed is gripped by the gripping jig 204.

As shown in FIG. 5, the processing apparatus 200 further includes a tailing unit 401 for attaching and detaching the member to be processed 101 to and from the inner jig 203 and the gripping jig 204. The tailstock unit 401 is provided with a cylinder 404 that moves the end face stopper 208 in the x-axis direction, and is arranged one by one so as to face each other with the workpiece 101 interposed therebetween. The tailstock unit 401 moves in the ± x-axis direction along the rail 403 arranged on the base 402 of the processing apparatus 200. In a state where the tailing unit 401 moves in the ± x-axis direction and the tailing unit 401 is separated from each other, the long axis of the member to be machined 101 is aligned with the axis AX, and the member to be machined 101 is arranged. After that, when the tailing unit 401 moves in the ± x-axis direction and approaches each other, the inner jig 203 and the gripping jig 204 are inserted into the ends of the member 101 to be machined. Next, the member 101 to be machined is pressed against the end face stopper 208 by the cylinder 404 to perform positioning in the x-axis direction. Next, after the position of the member 101 to be machined is constrained by the gripping jig 204, the end face stopper 208 retracts to a position that does not interfere with the molding process. Since the gripping jig 204 grips both ends of the member to be machined 101, it is possible to prevent the displacement of the member to be machined 101 in the x-axis direction that occurs during molding. After the molding process is completed, the tailstocking unit 401 releases the restraint of the member to be machined 101 by the gripping jig 204, and is separated to a position that does not hinder the removal of the member to be machined 101 that has been molded.

The forming roller 201 and the forming receiving roller 202 are arranged in the roller unit 500 as shown in FIGS. 6 to 8. The roller unit 500 includes a first unit 501 including a forming roller 201 and a second unit 502 including a forming receiving roller 202. The first and second units 501 and 502 move in the x-axis direction along the x-axis rail 209 arranged in the main body of the roller unit 500 according to the instruction of the control unit 220.

The molding roller 201 shown in FIGS. 6 and 7 is supported via the molding roller support arm 503. The forming roller support arm 503 moves in the y-axis direction along the y-axis rail 210 according to the instruction of the control unit 220. Further, the molding receiving roller 202 shown in FIGS. 6 and 8 is supported via the molding receiving roller support arm 504. The molding receiving roller support arm 504 moves in the y-axis direction along the y-axis rail 211 according to the instruction of the control unit 220. The molding roller 201 and the molding receiving roller 202 are supported by a bearing such as a bearing (not shown), and can easily rotate when they come into contact with the rotating member 101 to be machined.

As shown in FIG. 9, the molding receiving roller 202 rotates about the rotation shaft 202c. When the molding receiving roller support arm 504 moves inward in the radial direction, the molding receiving roller 202 moves inward in the radial direction as the molding receiving roller support arm 504 moves, and the molding receiving roller 202 The distance between the inner jig 203 and the inner jig 203 becomes narrower, and a compressive force F in the plate thickness direction is applied to the member 101 to be processed. The open end 101t of the member 101 to be machined is arranged so as to project from the inner jig 203, and the open end 101t is machined into a Z-shaped cross section as the machined portion 101e. As shown in FIG. 10, the molding receiving roller 202 includes a holding portion 202a that sandwiches the workpiece 101 together with the inner jig 203, and a molding portion 601 that determines the molding shape of the workpiece 101 provided at the end portion. , Have. The molded portion 601 includes an edge portion 602 adjacent to the holding portion 202a, a first flat portion 603 adjacent to the edge portion 602, a groove portion 604 adjacent to the first flat portion 603, and a second flat portion 604 adjacent to the groove portion 604. The flat portion 605 of the above is provided. The edge portion 602 is a portion that forms the first bent portion 102 on the member 101 to be processed. The first flat portion 603 is a portion that forms a diameter-expanded portion 104 on the member 101 to be processed. The groove portion 604 is a portion that forms a second bent portion 103 in the member 101 to be processed. The second flat portion 605 is a portion that forms the face plate portion 105 on the member 101 to be processed.

As shown in FIG. 11, the molding roller 201 rotates about the rotation shaft 201c, has a shape in which the tip portion 701 protrudes in a triangular cross section, and moves with the movement of the molding roller support arm 503. .. The forming roller 201 is in contact with the inner surface of the workpiece 101, and further sandwiches the workpiece 101e of the workpiece 101 with the molding portion 601 of the molding receiving roller 202 to open the workpiece 101. A Z-shaped cross section is formed on the workpiece 101e, which is the peripheral edge of the end 101t.

Next, the molding method according to the first embodiment will be described.

First, the tailing unit 401 shown in FIG. 5 moves in the ± x-axis direction, and in a state where they are separated from each other, the long axis of the member 101 to be machined is aligned with the axis AX, and the member 101 to be machined is arranged. After that, when the tailing unit 401 moves in the ± x-axis direction and approaches each other, the inner jig 203 and the gripping jig 204 are inserted into the ends of the member 101 to be machined. Next, the position of the member 101 to be machined is adjusted by the end face stopper 208 to position the member 101 in the x-axis direction. When the member to be machined 101 is positioned, the gripping jig 204 restrains the member to be machined 101. After that, the end face stopper 208 retracts to a position that does not interfere with the molding process.

Next, according to the instruction of the control unit 220, the molding receiving roller support arm 504 moves inward in the radial direction. When the molding receiving roller support arm 504 moves inward in the radial direction, the molding receiving roller 202 is pressed against the outer surface of the member to be machined 101 as shown in FIG. 9, and is internally cured with the molding receiving roller 202. A compressive force F in the plate thickness direction is applied to the member 101 to be processed sandwiched between the tool 203 and the tool 203.

Next, a step of bending to form the first bent portion 102 is carried out. According to the instruction of the control unit 220, the forming roller support arm 503 moves the forming roller 201 outward in the radial direction as shown in FIG. 12, and the tip portion 701 of the forming roller 201 moves the forming member 101. A radial outward force is applied to the opening end 101t. As a result, the first bent portion 102 is formed. At this time, the tip portion 701 of the molding roller 201 is located radially inside the workpiece 101 by the thickness t of the workpiece 101 from the second flat portion 605 of the molding receiving roller 202.

Next, a step of ironing to form the face plate portion 105, the second bent portion 103, and the diameter-expanded portion 104 is performed. According to the instruction of the control unit 220, the forming roller support arm 503 moves the forming roller 201 in the x-axis direction as shown in FIG. 13, and the tip portion 701 of the forming roller 201 receives the forming member 101 to be formed. The open end 101t of the member 101 to be machined is deformed while being pressed against the second flat portion 605 of the roller 202. As a result, the tip portion 701 of the molding roller 201 squeezes the member 101 to be processed to form the face plate portion 105, the second bent portion 103, and the diameter-expanded portion 104. By ironing, shape transferability is improved. The starting point of the ironing process is from the continuation of the bending process, and the end point of the ironing process is until the member 101 to be processed is pushed into the groove 604 of the molding receiving roller 202.

Next, a step of finishing is performed by pressing the enlarged diameter portion 104 against the first flat portion 603 with the forming roller 201. In consideration of the fact that the workpiece 101 springs back when the forming roller 201 and the forming receiving roller 202 are separated from the workpiece 101, this deforms the forming roller 201 and the forming receiving roller 202 significantly by the expected springback value with respect to the target shape. Is. According to the instruction of the control unit 220, the forming roller support arm 503 causes the forming roller 202 to form the enlarged diameter portion 104 formed on the workpiece 101 at the tip portion 701 of the forming roller 201 as shown in FIG. While pressing against the first flat portion 603, the forming roller 201 is moved inward in the radial direction of the member 101 to be processed. As a result, the enlarged diameter portion 104 is pressed by the tip portion 701 of the molding roller 201 and the first flat portion 603 of the molding receiving roller 202. As a result, the shape of the first flat portion 603 can be reliably transferred to the enlarged diameter portion 104. Further, since the tip portion 701 of the molding roller 201 presses the diameter-expanded portion 104 while moving inward in the radial direction, a force is applied from the diameter-expanded portion 104 to the first bent portion 102 inward in the radial direction. In addition, the angle of the first bent portion 102 approaches the target shape. The start point of the finishing process is the continuation of the ironing process, and the end point of the finishing process is slightly inside the workpiece 101 in the radial direction at the start position.

As described above, according to the processing method of the present embodiment, the first bent portion 102 of the member 101 to be processed is bent by bending, processed into a target shape by ironing, and finished by finishing. The enlarged diameter portion 104 formed on the member 101 to be processed by the forming roller 201 is pressed against the first flat portion 603 of the forming receiving roller 202. As a result, when the forming roller 201 and the forming receiving roller 202 are separated from the workpiece 101, the deformation applied to the workpiece 101 by the springback is slightly restored to the workpiece 101. Can be added. As a result, the change in shape due to springback can be suppressed, and the member 101 to be machined can be machined into a target shape.

On the other hand, as shown in FIG. 15, while the molding roller 201 is moved in the radial direction of the member 101 to be machined, the member 101 to be machined is formed by the tip portion 701 and the first flat portion 603 of the roller 202 for molding receiving. In the case of molding while sandwiching, if the distance between the tip portion 701 of the molding roller 201 and the first flat portion 603 of the molding receiving roller 202 is larger than the plate thickness, the cross-sectional Z shape is not formed, and conversely, if the distance is narrowed. The first bent portion 102 or the enlarged diameter portion 104 having a Z-shaped cross section becomes thinner than the target thickness. Further, during actual machining, the arm or device supporting the molding roller 201 bends due to the machining load, so that the molding roller 201 may not reach the target position and may deviate from the target shape. For this reason, it is not easy to process the member to be machined 101 into a target shape by the method of molding while sandwiching the member to be machined 101 between the tip portion 701 and the first flat portion 603 of the molding receiving roller 202. Further, as shown in FIG. 16, when the member 101 to be machined is machined while the tip portion 701 of the molding roller 201 is brought close to the groove portion 604 of the molding receiving roller 202, a thin portion is prevented from being locally formed. However, as in the case shown in FIG. 15, since the arm or device supporting the molding roller 201 is bent by the machining load, the molding roller 201 may not reach the target position and may deviate from the target shape. Therefore, it is not easy to process the member 101 to be processed into a target shape by the method of processing while the tip portion 701 of the forming roller 201 is brought close to the groove portion 604.

(Modification example)
In the above-described embodiment, an example in which the ironing process is performed once has been described. The ironing process is not limited to one time, and may be divided into a plurality of times. In the example shown in FIG. 17, the ironing process is performed in a plurality of times. Arrows 1a to 1i indicate the movement path of the tip portion 701 of the molding roller 201. First, in the bending process, as shown by the arrow 1a, the tip portion 701 of the forming roller 201 is moved, and the tip portion 701 of the forming roller 201 exerts a radial outward force on the opening end portion 101t of the member 101 to be processed. Perform bending process. At this time, the tip portion 701 of the molding roller 201 is arranged at the position shown in FIG. Next, as shown by the arrow 1b, the tip portion 701 of the forming roller 201 presses the workpiece 101 against the second flat portion 605 of the forming receiving roller 202, while the open end portion of the workpiece 101 is pressed. The ironing process for deforming 101t is carried out halfway. Next, the tip portion 701 of the molding roller 201 is moved as shown by arrows 1c and 1d, and the tip portion 701 of the molding roller 201 is once separated from the workpiece 101 and brought into contact with the ironed portion again. .. Next, the tip portion 701 of the forming roller 201 is moved as shown by the arrow 1e, and the ironing process is performed again. Next, the tip portion 701 of the forming roller 201 is moved as shown by arrows 1g and 1f, temporarily separated from the member 101 to be processed, and brought into contact with the ironed portion again. Next, the tip portion 701 of the forming roller 201 is moved as shown by the arrow 1h, and the ironing process is performed again. After that, the tip portion 701 of the molding roller 201 is moved as shown by an arrow 1i, and the molding roller 201 is pressed against the first flat portion 603 of the molding receiving roller 202 by the tip portion 701. Is subjected to a finishing process in which the member 101 to be processed is moved inward in the radial direction. By temporarily separating the tip portion 701 of the forming roller 201 from the member to be machined 101 and bringing it into contact with the ironed portion again, the ironing process can be performed in an overlapping manner. As a result, there are effects such as dispersion of strain and cooling of the workpiece 101e, and the same effect as the effect when the lubricant is supplied can be obtained.

In the above-described embodiment, an example in which bending, ironing, and finishing are continuously performed has been described. Bending, ironing, and finishing may be performed separately. In this case, as shown by the arrow 2a shown in FIG. 18, the tip portion 701 of the molding roller 201 is moved, and the tip portion 701 of the molding roller 201 faces outward in the radial direction toward the opening end portion 101t of the workpiece 101. Perform bending process to apply the force of. At this time, the tip portion 701 of the molding roller 201 is arranged at the position shown in FIG. Next, the tip portion 701 of the molding roller 201 is moved as shown by arrows 2b and 2c, and the tip portion 701 is separated from the member to be machined 101 and brought into contact with the member 101 again. Next, the tip portion 701 of the forming roller 201 is moved as shown by the arrow 2d, and the ironing process shown in FIG. 13 is performed. Next, the tip portion 701 of the molding roller 201 is moved as shown by arrows 2e and 2f, and the tip portion 701 is separated from the member to be machined 101 and brought into contact with the member 101 again. Next, the tip portion 701 of the molding roller 201 is moved as shown by the arrow 2g, and the tip portion 701 presses the member 101 to be machined against the first flat portion 603 of the molding receiving roller 202 for molding. A finishing process is performed in which the roller 201 is moved inward in the radial direction of the member 101 to be processed. By performing the bending process, the ironing process, and the finishing process separately, there are effects such as dispersion of strain and cooling of the workpiece 101e, and the same effect as the effect when the lubricant is supplied can be obtained.

In the above-described embodiment, an example in which the member 101 to be processed has a cylindrical shape has been described. The non-processed member 101 may have a tubular shape and may have an elliptical tubular shape. Further, in the above-described embodiment, an example in which the entire member 101 to be processed has a cylindrical shape has been described. The shape may be a shape having a cylindrical shape as a part, and the tubular portion having a cylindrical shape and one end of the tubular portion are opened, and the other end is closed by a plate-shaped member or a shell-shaped member. There may be.

The present invention allows for various embodiments and modifications without departing from the broad spirit and scope of the present invention. Moreover, the above-described embodiment is for explaining the present invention, and does not limit the scope of the present invention.

101 ... Member to be machined, 101t ... Open end, 101e ... Worked part, 102 ... First bent part, 103 ... Second bent part, 104 ... Diameter enlarged part, 105 ... Face plate part, 200 ... Machining device, 201 ... Molding roller, 201c, 202c ... Rotating shaft, 202 ... Molding receiving roller, 202a ... Holding part, 203 ... Inner jig, 204 ... Gripping jig, 205 ... Rotating spindle, 206 ... Rotating driven shaft, 207 ... Motor, 208 ... end face stopper, 209 ... x-axis rail, 210, 211 ... y-axis rail, 212 ... reduction mechanism, 220 ... control unit, 301 ... gripping block, 302 ... support unit, 303 ... driven unit, 304 ... extrusion Member, 401 ... tailstock unit, 402 ... base, 403 ... rail, 404 ... cylinder, 500 ... roller unit, 501 ... first unit, 502 ... second unit, 503 ... molding roller indicator arm, 504 ... molding Receiving roller indicator arm, 601 ... Molded portion, 602 ... Edge portion, 603 ... First flat portion, 604 ... Groove portion, 605 ... Second flat portion, 701 ... Tip portion

Claims (4)

A first bent portion and a first bent portion bent in different directions by rotating a cylindrical workpiece mounted on a jig and sandwiching an end portion of the workpiece member between a forming roller and a forming receiving roller. It has two bent portions, an enlarged diameter portion is arranged between the first and second bent portions, a non-processed portion is extended to the first bent portion, and the second bent portion is provided with an unprocessed portion. It is a processing method for processing a face plate portion into an extended cross-section Z shape.
The molding receiving roller has a holding portion that faces the jig and sandwiches the member to be machined, and a molding portion that determines the molding shape of the member to be machined. A step of bending the first bent portion by applying a force to the end portion of the member to be processed by the forming roller while the member to be processed is sandwiched between the sandwiched portions.
The molding roller is pressed against the member to be processed in which the first bent portion is bent, and the face plate portion is formed while being squeezed between the molding roller and the molding portion provided on the molding receiving roller. A step of ironing to form the face plate portion, the second bent portion, and the enlarged diameter portion, and
A step of finishing processing in which the diameter-expanded portion of the member to be processed in which the face plate portion, the second bent portion, and the diameter-expanded portion are formed is pressed by the molding roller.
Processing method including. In the middle of the ironing process, the forming roller is once separated from the member to be processed, brought into contact with the ironed portion again, and the ironing process is restarted.
The processing method according to claim 1. After performing the bending process, the forming roller is separated from the member to be processed, the forming roller is brought into contact with the member to be processed again to perform the ironing process, and then the forming roller is moved to the said member. Separated from the member to be machined, the molding roller is brought into contact with the member to be machined again to perform the finishing process.
The processing method according to claim 1 or 2. A rotating mechanism that rotates a jig that mounts a tubular member to be processed,
It has a first bent portion and a second bent portion that are bent in different directions to rotate by sandwiching the end portion of the member to be machined, and an enlarged diameter portion is arranged between the first and second bent portions. A non-processed portion is extended to the first bent portion, and a molding roller and a molding receiving roller for processing into a Z-shaped cross section having a face plate portion extended to the second bent portion.
A control unit for controlling the movement of the molding roller is provided.
The molding receiving roller has a holding portion that faces the jig and sandwiches the member to be machined, and a molding portion that determines the molding shape of the member to be machined.
A processing device that processes the member to be processed in a state of being sandwiched between the jig and the holding portion of the molding receiving roller.
The control unit controls the movement of the molding roller, and controls the movement of the molding roller.
A step of bending the first bent portion by applying a force to the end portion of the member to be processed by the forming roller.
The molding roller is pressed against the member to be processed in which the first bent portion is bent, and the face plate portion is formed while being squeezed between the molding roller and the molding portion provided on the molding receiving roller. A step of ironing to form the face plate portion, the second bent portion, and the enlarged diameter portion, and
A step of finishing the member to be processed in which the face plate portion, the second bent portion, and the diameter-expanded portion are formed by pressing the diameter-expanded portion with the molding roller is executed.
Processing equipment.

Images