JP3928146B2 - Ring-shaped roll forming device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to roll forming of a ring-shaped material that uses a forming roll, a mandrel, and a receiving roll to form and process particularly asymmetric ring-shaped parts such as spinning rings used in spinning machines such as gears, spinning machines, and twisting machines. It relates to the device.
[0002]
[Prior art]
Conventionally, when a ring-shaped part having an annular groove on the inner peripheral surface thereof is molded like an outer race of a ball bearing, the ring-shaped material 10 is supported on a mandrel 13 as shown in FIG. While restricting both ends of the ring-shaped material 10 in the axial direction, the ring-shaped material 10 is pressed from the inner and outer surfaces by the molding roll 15 and the mandrel 13, and the molding roll 15, the receiving roll 14 and the mandrel 13 are rotated in this state. Thus, the groove 16 was formed on the inner peripheral surface of the ring-shaped material 10 by the protruding portion formed on the mandrel 13.
[0003]
[Problems to be solved by the invention]
However, in particular, when forming an asymmetric ring-shaped part that also forms one end in the axial direction of the ring-shaped material, surplus material is pushed out from a slight gap between the forming roll and the mandrel, and the Is generated.
[0004]
For this reason, after roll forming, the end face is cut by a lathe process to remove burrs, and at the same time, a planar process is performed.
[0005]
In addition, when molding a left-right asymmetric ring-shaped part, the ring-shaped material is tilted in one direction, and the accuracy of the inner and outer diameters and the processing accuracy of the expanded pipe are significantly reduced.
[0006]
An object of the present invention is to provide a roll-forming apparatus for a ring-shaped material that forms a ring-shaped part with good processing accuracy without causing burrs on the end surface by pressing the end surface in the axial direction.
[0007]
The present invention aims to achieve the above-mentioned problems.
[0008]
[Means for Solving the Problems]
The present invention has been made to achieve the above object,
A molding roll that presses and contacts the outer peripheral surface of the ring-shaped material;
A mandrel that contacts the inner peripheral surface of the ring-shaped material and performs molding on the ring-shaped material together with the molding roll;
A roll forming device that is in contact with the outer peripheral surface of the mandrel and comprises a receiving roll that supports the mandrel,
The outer peripheral surface of the lateral pressing roll is pressed and brought into contact with an open molding portion having at least a regulating surface of the molding roll so as to regulate the axial extension of the ring-shaped material molded by the mandrel and the molding roll. The present invention provides a roll forming apparatus for a ring-shaped material configured as described above.
[0009]
Further, the lateral push roll is disposed on the outer surface of the open molding part that does not have the regulation surface of the molding roll and the regulation surface of the molding roll, and the outer circumferential surface of the lateral push roll is pressed against the molding part and the outer surface. Accordingly, the ring-shaped material roll forming apparatus is configured to restrict axial extension of the ring-shaped material formed by the mandrel and the forming roll in the open forming portion and prevent deformation of the forming roll. Is to provide.
[0010]
In the roll forming apparatus of the present invention, even if the molding process is performed in an exposed state without restricting one mold carved end surface of the molding roll, it is pressed by the lateral pressing roll from the end surface side of the molded part. When molding is performed, pressure is applied between the mandrel and the molding roll, and surplus material that is about to protrude between the mandrel and the molding roll is pressed by the lateral pressing roll, and the end surface of the ring-shaped part is formed into a flat surface without burrs.
[0011]
In addition, since the ring-shaped material that has been generated by the lateral push rolls is restrained from being tilted and molded in a normal posture, a ring-shaped part with good machining accuracy is molded.
[0012]
In addition, when pressed by the lateral pressing roll from the other outer surface of the molding roll, the lateral displacement and deformation of the molding roll due to the load from the one lateral pressing roll applied to the molding roll can be suppressed, and uniform dimensional accuracy Ring-shaped parts can be formed, and abnormal wear of the bearings of the forming roll can be prevented, thereby extending the service life.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example of an embodiment of a roll forming apparatus for a ring-shaped material according to the present invention will be described with reference to the drawings.
[0014]
FIG. 1 shows a schematic configuration of a main part of a ring-shaped material roll forming apparatus according to the present invention.
[0015]
The ring-shaped material roll forming apparatus includes a forming roll 1 having a predetermined ring outer shape, a mandrel 2 having a predetermined ring inner shape, and a receiving roll disposed to face the forming roll 1 with the mandrel 2 interposed therebetween. 3 and a lateral pressing roll 4 arranged so as to be in press contact with the side surface of the molding portion of the molding roll 1 and the mandrel 2.
[0016]
The forming roll 1 has a forming portion 6 formed in an outer shape of a ring-shaped part on which the outer peripheral surface 5 is formed, and a restriction that regulates a side surface of the ring-shaped part on one side surface of the outer peripheral surface 5. It has a surface 7 and is formed in a left-right asymmetric stepped shape having no regulating surface on the other side surface.
[0017]
The mandrel 2 has a convex forming part 9 formed in the inner shape of a ring-shaped part on which the outer peripheral surface 8 constituting the forming surface is formed.
[0018]
The receiving roll 3 includes two receiving surfaces 3a and 3b arranged on both sides of the protruding portion 9 of the mandrel 2, and when the ring-shaped part is formed, the receiving surfaces 3a and 3b are provided. Is brought into contact with the shaft of the mandrel 2 from the opposite side of the forming roll 1 to receive the pressing force of the forming roll 1 applied to the mandrel 2.
[0019]
As shown in FIG. 2, the lateral pushing roll 4 has an axis perpendicular to the axis of the molding roll 1, the side surface of the molded part 6 that is not provided with the regulating surface of the molding roll 1, and the mandrel 2. It is arrange | positioned so that the outer peripheral surface may press-contact to the side surface of this shaping | molding part 9.
[0020]
Next, the operation of the above apparatus will be described.
[0021]
First, the forming roll 1, the mandrel 2 and the lateral pushing roll 4 are positioned at the start position. At this time, the forming roll 1 and the receiving roll 3 are retracted in the direction away from the mandrel 2 with respect to the forming position of the ring-shaped part in FIG. 1, and the side pushing roll 4 is also away from the side surface of the forming portion 6 of the forming roll 1. Retreat to. The mandrel 2 then moves back in the axial direction.
[0022]
Next, the ring-shaped material 10 is held at the molding position. Then, the mandrel 2 is advanced in the axial direction, and the tip of the mandrel 2 is fitted and supported by the bearing of the bracket through the inside of the ring-shaped material 10, and the ring-shaped material 10 is supported by the mandrel 2.
[0023]
Then, the forming roll 1 and the receiving roll 3 are advanced so that the forming portion 9 of the mandrel 2 is positioned at a forming position facing the forming portion 6 of the forming roll 1 and at the same time the receiving surfaces 3a and 3b of the receiving roll 3 are provided. The mandrel 2 is brought into contact with the outer peripheral surface of the shaft.
[0024]
Further, the lateral pushing roll 4 is advanced and brought into contact with the side surfaces of the molding parts 6 and 9 of the molding roll 1 and the mandrel 2.
[0025]
Next, following the above operations, the molding roll 1 is advanced toward the mandrel 2, and the ring-shaped material 10 is moved from the inner and outer surfaces by the molding portion 9 of the mandrel 2 and the molding portion 6 of the molding roll 1. Squeeze.
[0026]
At the same time, the lateral pushing roll 4 is pressed against the side portions of the forming portions 6 and 9 of the forming roll 1 and the mandrel 2.
[0027]
In this state, the forming roll 1 is further pressed toward the mandrel 2 while rotating the forming roll 1, the receiving roll 3 and the lateral pushing roll 4, and at the same time, the receiving roll 3 is pressed against the mandrel 2, whereby the ring-shaped material 10 is predetermined. It is formed in the shape of a ring-shaped part.
[0028]
After the molding process is completed as described above, the rotation of the molding roll 1, the mandrel 2 and the lateral pushing roll 4 is stopped and returned to the start position in the same manner as described above. The following processing is performed by repeating the same operation as.
[0029]
According to the above embodiment, the surplus material that has been pressed and deformed by the forming roll 1 and the mandrel 2 does not protrude from the side surface of the forming portion, and the ring-shaped material is processed while being stably held. The processing accuracy is improved and the generation of burrs can be prevented.
[0030]
In the above embodiment, the lateral push roll 4 is disposed only on the side surface of the molding portion of the molding roll 1 and the mandrel 2, but as shown in FIG. It is also possible to arrange a lateral pushing roll 12 that receives the pressing force of the lateral pushing roll 4 at a position facing the pushing roll 4.
[0031]
By disposing the lateral pushing roll 12 as described above, it is possible to prevent the lateral displacement or deformation of the forming roll 1 due to the load from the lateral pushing roll 4 applied to the forming roll 1, and to obtain a ring-shaped part with uniform dimensional accuracy. In addition to being able to be molded, abnormal wear of the bearings of the forming roll 1 can be prevented and the life can be extended.
[0032]
【The invention's effect】
In the roll forming apparatus of the present invention, since it is pressed by the lateral pressing roll from the side surface of the forming portion of the forming roll and the mandrel, it is pressed between the mandrel and the forming roll when the ring-shaped part is formed, The surplus that is about to protrude from the gap is suppressed, and the end surface of the ring-shaped part is formed in a flat surface without burrs. Accordingly, the finishing process of deburring is not necessary, and the number of manufacturing steps can be reduced.
[0033]
In addition, since the ring-shaped material that has been generated by the lateral pressing roll is restrained from being tilted and molded in a normal posture, a ring-shaped component with good machining accuracy can be obtained.
[0034]
Also, when pressing from both side surfaces of the molding roll with a laterally pressing roll, lateral deformation or deformation of the molding roll due to a load from one laterally pressing roll applied to the molding roll can be suppressed, and abnormal wear of the bearings of the molding roll This is an invention having an excellent effect of preventing the deterioration of the product quality due to deformation of the forming roll.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of an essential part showing an embodiment of a roll forming apparatus for a ring-shaped material according to the present invention.
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a schematic configuration diagram of a main part showing another embodiment of a roll forming apparatus for a ring-shaped material according to the present invention.
FIG. 4 is a schematic configuration diagram showing a main part of a conventional roll forming apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1,15 Molding roll 2,13 Mandrel 3,14 Receiving roll 4,12 Side pushing roll 5,8 Outer surface 6,9 Molding part 7 Control surface 10 Ring-shaped raw material 11 Outer surface

Claims (2)

A molding roll that presses and contacts the outer peripheral surface of the ring-shaped material;
A mandrel that contacts the inner peripheral surface of the ring-shaped material and performs molding on the ring-shaped material together with the molding roll;
A roll forming device that is in contact with the outer peripheral surface of the mandrel and comprises a receiving roll that supports the mandrel,
The outer peripheral surface of the lateral pressing roll is pressed and brought into contact with an open molding portion having at least a regulating surface of the molding roll so as to regulate the axial extension of the ring-shaped material molded by the mandrel and the molding roll. A roll forming apparatus for a ring-shaped material, characterized in that it is configured. A molding roll that presses and contacts the outer peripheral surface of the ring-shaped material;
A mandrel that contacts the inner peripheral surface of the ring-shaped material and performs a molding process on the ring-shaped material together with the molding roll;
A roll forming device that is in contact with the outer peripheral surface of the mandrel and comprises a receiving roll that supports the mandrel,
Release the ring-shaped material formed by the mandrel and the forming roll by bringing the outer peripheral surface of the lateral pressing roll into press contact with the outer surface of the forming portion that does not have the restricting surface of the forming roll and the restricting surface of the forming roll. A roll forming apparatus for a ring-shaped material, characterized in that the extension in the axial direction of the formed forming portion is restricted.

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