JPH0229414B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a bearing ring forming apparatus that cold-rolls and forms bearing rings, such as inner and outer rings, into a predetermined shape.

(b) Prior Art When forming a ring body such as an inner or an outer ring in the above-mentioned bearing, as shown in FIG. 10, a processed ring body (hereinafter referred to as (simply abbreviated as work) 11 is inserted, and this work 11
By pressing the forming roller 31 while rotating, the workpiece 11 can be formed into an inner or outer shape.

However, in this forming method, the thickness of the work 11 changes from thick to thin from the beginning to the end when the forming roller 31 rolls the work 11, so the circumferential speed of the work 11 changes from fast to slow. Changes sequentially.

For this reason, if the rotational speeds of the forming roller 31 and the support roller 33 are fixedly set, for example, to the same rotational speed, the circumferential speed of the workpiece 11 changes as described above. Work 11
A difference in circumferential speed occurs between the forming roller 31 and the forming roller 31, and in order to absorb this difference, a slip occurs between the two.

When such a slip occurs, the workpiece 11 rotates unevenly and vibrates up and down, causing problems such as the thickness of the workpiece 11 being deformed and the workpiece 11 becoming out of round.

Furthermore, the above-mentioned slip causes severe abrasion of the forming roller 31, leading to an increase in the replacement cycle of the forming roller 31, resulting in a significant drop in production efficiency.

(C) Purpose of the Invention This invention prevents fluctuations in peripheral speed between the forming roller and the workpiece by interposing a one-way clutch in each drive system of the forming roller and support roller to transmit power, thereby reducing the difference in circumferential speed. To provide a ring forming device for a bearing, which eliminates vibration and deformation of a workpiece caused by the above, allows forming a ring of good quality, and allows a forming roller to be used for a long period of time.

(D) Structure of the Invention The present invention comprises a forming roller having a ring forming part formed on its central peripheral surface, a forming roller facing the forming roller so as to be able to approach and separate from the forming roller, and a ring forming part formed on the central peripheral surface, and a ring forming part formed on both sides of the forming roller. Three rotating elements, a mandrel with a regulating surface formed on its surface, and a single support roller placed opposite to the back side of this mandrel and forming a sliding surface that contacts the regulating surface of the mandrel, are arranged parallel to each other on a plane. By arranging
each of which is rotatably supported, and is configured to perform ring forming only between the ring forming part of the forming roller and the ring forming part of the mandrel, and the forming roller;
It is characterized by a bearing ring forming device in which rotational force is transmitted by interposing a one-way clutch in each of the support rollers to absorb variations in circumferential speed between the workpiece and the forming roller.

(E) Effects of the Invention According to this invention, when the circumferential speed of the workpiece is high, this high circumferential speed is transmitted to the forming roller, the one-way clutch on the forming roller side becomes free, and the forming roller When the circumferential speed is high, the one-way clutch on the support roller side becomes free, as described above, and as a result, no matter how much variation occurs in the circumferential speed between the workpiece and the forming roller, both always maintain the same circumferential speed. Therefore, slippage between the workpiece and the forming roller due to this circumferential speed fluctuation is reliably prevented.
By preventing deformation of the workpiece due to vibration and obtaining a high-quality ring body, it is also possible to eliminate wear of the forming roller due to slip, making it possible to withstand long-term use and increase production efficiency.

In addition, when rolling the workpiece, the workpiece can freely extend in the radial direction, allowing efficient rolling, and the pressure applied to the mandrel is relatively small compared to the conventional structure using a control ring. The life of the mandrel can be extended and the durability improved, and by using a single support roller, even when rolling small-diameter workpieces, it is possible to roll the workpiece more easily than with the conventional structure that uses two rolling rolls. The pressure applied to the mandrel does not increase.

Furthermore, since the workpiece is shaped between a forming roller and a mandrel, it is possible to shape the workpiece from its outer diameter side, making it easier to form the inner race of the bearing.

(F) Embodiment of the Invention An embodiment of the invention will be described in detail below based on the drawings.

The drawings show a wheel forming device for forming each wheel (work) such as the inner or outer of a bearing or a pillow. In FIGS. 1 and 2, this mass forming device 10 is configured to A supply section 12 that supplies the workpiece 11, a forming section 13 that forms the supplied work 11 into an unfinished inner or outer shape, a drive section 14 that drives this forming section 13, and an inner molded by the above-mentioned forming section 13. A finishing section 15 is provided for finishing the workpiece 11 to a predetermined size.

(A) Description of the supply section 12 As shown in FIGS. 3 and 4, the above-mentioned supply section 12 includes a shutter 16 that stores the aforementioned works 11 in a row and allows them to flow down, and a shutter 16 that stores the aforementioned works 11 in a row and allows them to flow down.
A holder 17 and a push rod 1 take out the workpieces 11 one by one and supply them to the lower molding section 13.
8.

The above-mentioned shooter 16 is formed into a cylindrical shape with a rectangular cross section, is open at the upper end side and the lower end side, is tilted so that the work 11 stored from the upper end opening can flow to the lower end opening under its own weight, and On the lower surface side of the opening at the lower end, there is a lower molded part 1.
Vertical guide member 1 with a U-shaped cross section extending to the 3 side
9 are installed in a row.

The above-mentioned holder 17 faces the front surface of the lower end of the shooter 16, and has an arcuate holding surface 2 on the opposite surface.
0 is formed, and this holding surface 20 catches the workpiece 11 flowing down.

The push rod 18 described above is arranged so as to come into contact with the upper surface of the workpiece 11 received by the holding surface 20 of the holder 17 described above.

The upper end of the push rod 18 is fixed to the front side of the slider 21, and the upper end of the holder 17 is pivoted to the slider 21 with a pin 22, and the holder 17 is pushed by a spring 23. The above-mentioned spring 23 is biased toward the rod 18 side, and the above-mentioned spring 23 is biased toward the rear side.
It is provided so that it can move against the

This backward movement is useful when the held workpiece 11 is supplied to the forming section 13 and then released.

The slider 21 described above has a guide portion 25 connected to the lower part of a support frame 24 vertically erected.
The above-mentioned holder 17 and push rod 18 are held slidably in the vertical direction by
It moves up and down reciprocally up to the center of the

Further, the holding structure for the slider 21 and the guide portion 25 described above is implemented by a well-known dovetail groove structure.

A supply cylinder 26 is formed inside the support frame 24, and the upper end of the piston rod 27 extending upward and the upper end of the slider 21 are connected by a connecting member 28. The cylinder 26 operates the vertical movement of the slider 21 .

The lower part of the support frame 24 described above is fixed to a fixing rod 29.

In the supply section 12 configured in this way, the upper limit position is set at the position where the holding surface 20 of the holder 17 faces the lower end opening of the shooter 16, and the lower limit position is set at the center of the aforementioned molding section 13. , the holder 17 and the push rod 18 reciprocate between these upper and lower sides.

The workpiece 11 to be formed is transferred to the above-mentioned shooter 16.
A large number of workpieces are stored in a row, and the lowest workpiece 11
is in contact with the holding surface 20 of the holder 17.

The supply cylinder 26 is driven, and the slider 2
When the holder 17 and the push rod 18 move downward through the vertical guide member 1, one workpiece 11 is moved downwardly through the vertical guide member 1.
It is supplied to the lower molding section 13 while sliding on the guide surface 9 .

Note that the next workpiece 11 is prevented from falling in front of the push rod 18.

When the work 11 is supplied to the above-mentioned forming section 13, a mandrel, which will be described later, is inserted into the center of the work 11 and receives the work 11.

Next, the slider 21 is stopped and the holder 1
7 and the push rod 18, since the workpiece 11 is received by the mandrel, the holder 1
7 retreats against the spring 23, releases the hold on the workpiece 11, returns to its original position, and one supply of the workpiece 11 is completed.

(B) Description of the forming section 13 As shown in FIGS. 5 and 6, the above-mentioned forming section 13 converts the workpiece 11 supplied from the supply section 12 in the previous stage into an unfinished shape of an inner, outer or pillow. Form.

This forming section 13 is formed by forming a forming roller 3.
1, a mandrel 32, and a support roller 33, and the axes of these three rotating elements are arranged parallel to each other on a plane.

Further, the driving section 14 (see FIG. 2) drives and controls the forming roller 31 and the support roller 33 described above.

The above-mentioned forming roller 31 forms a ring forming part 34 on its central circumferential surface, and this ring forming part 34 has a convex shape when the workpiece 11 to be processed is an inner piece, and a convex shape when the workpiece 11 to be processed is an outer piece or a pillow piece. are each formed in a concave shape, and are selected from pre-prepared forming rollers 31 and replaced depending on the shape and size of the work to be formed.

In addition, the ring forming portion 3 of the forming roller 31 described above
Both side circumferential surfaces of 4 form regulating surfaces 35, 35,
These regulating surfaces 35, 35 face the later-described regulating surfaces of the mandrel 32 described above.

A first shaft 36 that pivotally supports the above-mentioned forming roller 31
By fitting the key 37, this forming roller 3
The rotation of the first shaft 36 is prevented from rotating, and the first shaft 36 is supported by left and right bearing members 38 and 39.

The above-mentioned bearing members 38 and 39 are attached to the sliding block 4.
The bearing member 38 located on the front side of the bolt and nut 4 and located on the outer end side of the first shaft 36 described above is
It is removably fixed by the fixing means according to No. 1, and is removed when the forming roller 31 is replaced.

Further, the other bearing member 39 is connected to the sliding block 4
0, and both bearing members 3
Bearings 42 and 43 for bearing the first shaft 36 are housed inside the shafts 8 and 39.

The above-mentioned sliding block 40 is housed inside a box-shaped cover 45 fixed on the machine base 44, and the machine base 44 inside this cover 45 is formed with a guide portion 46 having a dovetail groove structure. The sliding block 40 is slidably guided in the front-rear direction by the guide portion 46.

A piston rod 48 of a molding cylinder 47 attached to a machine base 44 is connected to the rear side of the above-mentioned sliding block 40, and this cylinder 47
The sliding block 40 is slid in the front-back direction by the drive of the slide block 40.

As shown in FIG. 7, the above-mentioned mandrel 3
A ring forming part 49 is formed on the central peripheral surface of the ring forming part 49, and this ring forming part 49 is formed into a concave shape when the workpiece 11 is to be machined, and a convex shape when the workpiece 11 is to be machined. Depending on the shape and size of the workpiece 11 to be molded,
The mandrel 32 can be selected and replaced from the mandrels 32 prepared in advance.

In addition, the ring forming portion 4 of the mandrel 32 described above
Regulating surfaces 50, 50 are formed on both circumferential surfaces of 9, and these regulating surfaces 50, 50 face the regulating surfaces 35, 35 of the forming roller 31 described above.

The base end of the mandrel 32 described above is rotatably supported by a support member 52 via a bearing member 51, and by removing the rear bolt 53,
The mandrel 32 can be replaced.

The above-mentioned support member 52 is fixed to the upper surface of the sliding body 54, and this sliding body 54 is supported by two parallel guide rods 55, 55 so as to be slidable in the front-back direction.

Moreover, the above-mentioned guide rods 55, 55 are installed on fixing members 56, 56 arranged in the front and rear.

A double rod-shaped mandrel cylinder 57 is integrally formed at the lower part of the sliding body 54,
Both ends of the piston rod 58 of this cylinder 57 are mounted on the aforementioned fixing members 56, 56.

For this purpose, when the above-mentioned cylinder 57 is driven, the cylinder 57 side, that is, the cylinder tube, is slid in the front and back direction, and the mandrel 32 is moved.

The above-mentioned fixing members 56, 56 are fixed on a stand 59, and a support member 60 is fixed on the rear end side of this stand 59, and the above-mentioned mandrel 32 is placed in the molding position on the upper surface of this support member 60. A receiving member 61 is fixed, into which the distal end is inserted and supported when it is moved.

Further, the lower surface of the table 59 is slidably held by the extension of the guide portion 46 that slidably holds the sliding block 40 of the forming roller 31, and is supported by a support described later. Adjust the position of mandrel 32 relative to roller 33.

A pinion 62 is pivotally supported on the lower surface of the table 59, and a rotating shaft 63 of the pinion 62 extends to the front side to form a handle attachment portion 64. (omitted) is attached and rotated.

In addition, the machine base 4 facing the above-mentioned pinion 62
4 has a rack 6 that meshes with the pinion 62.
5 is fixed and the above-mentioned pinion 62 is rotated to adjust the position of the table 59 in the distance direction with respect to the support roller 33.

As shown in FIG. 5, the support roller 33 described above is composed of a pair of rollers 66, 66 facing each other at a predetermined interval, and these rollers 66, 66 are connected to the regulating surface of the mandrel 32 described above. 50, 50, this mandrel 32
It is a sliding contact surface that supports

The outer dimensions of the rollers 66, 66 are approximately the same as or slightly larger than the regulating surfaces 35, 35 of the forming roller 31 described above.

Further, the second shaft 67 that pivotally supports the rollers 66, 66 described above has the same configuration as the forming roller 31 described above, and the rotation of the rollers 66, 66 is controlled by fitting a key (not shown). Further, the second shaft 67 is supported by bearing members 68 and 69 on the left and right sides.

The above-mentioned bearing members 68 and 69 are arranged on the front side of a fixed block 70 fixed on the machine base 44, and the above-mentioned bearing member 68 located on the outer end side of the second shaft 67 is fixed by a bolt/nut 71. These rollers 66, 6 are removably fixed.
6. In other words, various kinds of support rollers 33 are prepared in advance according to the size of the roller 11 to be processed, and the support roller 33 corresponding to the processing is selected and used from among them.

Further, the other bearing member 69 is connected to the fixed block 7.
0, and both bearing members 6
Similar to the above-described forming roller 31, an appropriate bearing for bearing the second shaft 67 is housed inside the rollers 8 and 69.

In the molding section 13 configured in this way, the mandrel 32 is connected to the rollers 66 and 6 of the support roller 33.
6, that is, when pressure is applied from the forming roller 31, the regulation surfaces 50, 50 are displaced by this pressure, causing the rollers 66,
The resilient mandrel 32 is moved back and forth from the forming position, and the forming roller 31 and the support roller 33 are moved from the supply section 12 to They face each other at a distance sufficient to receive the supplied workpiece 11.

When the work 11 is supplied from the upper supply section 12, the mandrel 32 moves forward to the forming position, inserts the center of the supplied work 11, and receives it at the position of the wheel forming section 49. After the molding is enabled, the molding roller 31 and the support roller 33 are driven in a predetermined direction by a drive unit 14, which will be described later.

(C) Description of the drive unit 14 As shown in FIGS. 2, 8, and 9, the drive unit 14 described above includes a gear box 72 and a motor 7.
A two-thread chain 78 is stretched between a sprocket 75 fixed to the output shaft 74 of the motor 73 and a sprocket 77 fixed to the input shaft 76 of the gearbox 72. is conducted.

Inside the gear box 72, there is a gear 79 fixed to the input shaft 76, and a gear 79.
a first gear 80 that meshes with each other at positions on both sides of the
A second gear 81 is housed, and these gears 80,
81 are formed to have the same number of teeth, and a first output shaft 82 and a second output shaft 83 which are key-fitted are extended to the outside of the gear box 72.

Therefore, each of the first and second output shafts 8 described above
2 and 83 are constant speed rotations.

One-way clutches 84, 85 are connected to the outer ends of each of the above-mentioned output shafts 82, 83, and these one-way clutches 84, 85 are further connected with connecting shafts 87, which are connected to ball universal joints 86 at both ends. 8
8 are telescopically connected by spline fitting, and power is transmitted from these connecting shafts 87 and 88 to the aforementioned first shaft 36 and second shaft 67 via the Hall universal joint 86.

The drive unit 14 configured in this way is equipped with a motor 73.
When the is rotated in a predetermined direction, this rotational force is transmitted to the input shaft 76 of the gearbox 72, outputted to each output shaft 82, 83 via gears 79, 80, 81 of the gearbox 72, and further The first shaft 36 and the second shaft 67 via shafts 87 and 88
Rotational force is transmitted to each of them at a constant speed and in the same direction.

The aforementioned forming section 13 receives the workpiece 11 on the ring forming section 49 of the mandrel 32, and as the first shaft 36 and the second shaft 67 are rotated as described above, the forming roller 31 and the support roller 3 are rotated.
3 is rotated, and further, the forming cylinder 47 advances the forming roller 31, so that the ring body 11
molding begins.

As shown in FIG. 10, when the ring forming portion 34 of the forming roller 31 comes into contact with the circumferential surface of the workpiece 11 and presses it, the mandrel 32 is slightly retreated through the workpiece 11, and its regulating surface 50, 50
contacts the rollers 66, 66 as sliding surfaces of the support roller 33, and this mandrel 32 also rotates.

Further, the forming roller 31 is pressed, and the ring forming portion 34 contacts the central outer peripheral surface of the workpiece 11 and receives pressure, so that the workpiece 11 receives rotational force from the mandrel 32 side.

Therefore, in the early stage of forming, the rotating outer shape of the workpiece 11 has a larger diameter than the regulating surface 50 of the mandrel 32, so the circumferential speed of the outer circumference of the workpiece 11 becomes faster than the circumferential speed of the forming roller 31.

When the forming roller 31 receives a high circumferential speed from the workpiece 11, since the one-way clutch 84 is interposed in the drive system of the forming roller 31, this clutch 84 becomes free, and the forming roller 31 receives a high circumferential speed of the workpiece 11. Rotates at a constant speed to avoid circumferential speed differences.

In this way, the work 11 and the forming roller 31 rotate at a constant speed, and the forming roller 31 presses the work 11, so that the work 11 is moved to the forming roller 31.
Rolling is performed while rotating by the ring forming part 34 of the mandrel 32 and the ring forming part 49 of the mandrel 32.

In the above-described rolling, the forming roller 31 and the workpiece 11 come into contact with each other on the convex surfaces of their outer circumferential surfaces, so that the contact area is small and the acting force of the cylinder 47 can be relatively small.

The workpiece 11 is rolled by the pressure of the forming roller 31 described above, and the regulating surface 3 of the forming roller 31 is rolled.
5, 35 are the regulating surfaces 50, 50 of the mandrel 32
When the wall thickness of the workpiece 11 reaches the set unfinished dimension, rolling ends (the first
(See Figure 1).

By this rolling, a concave ball receiving surface is formed on the outer circumferential surface of the workpiece 11, and an inner diameter surface is formed on the inner circumferential surface, thereby completing a ring body for an inner bearing.

Note that the dimensions of the workpiece 11 are preset so that the inner diameter of the above-mentioned inner is finished at an unfinished dimension that is extremely slightly smaller than the specified finished dimension, and the final finishing is performed by the finishing section 1 of the next stage.
It will be held at 5.

When the predetermined rolling of the workpiece 11 is completed, the forming roller 31 is moved back and returned to its original position, and the mandrel 32 is also moved back, so the workpiece 11 that was inserted through the mandrel 32 is pulled out and falls to the bottom. be discharged.

A shutter 90 extending to the finishing section 15 is provided at the lower part of the molding section 13 (see FIG. 1),
The molded workpiece 11 is received by the shooter 90 and supplied to the finishing section 15.

FIG. 12 shows an example of forming a work 11 for an outer. In this case, a concave groove for forming the outer diameter surface of the outer is formed in the ring forming part 34 of the forming roller 31, and a ring of the mandrel 32 is formed. A protrusion forming a ball receiving surface is formed on the body forming portion 49, and the outer ring body is formed in the same manner as in the case of the inner ring described above.

In addition, in the case of the outer, the dimensions of the workpiece 11 are set in advance so that the outer diameter is made to an unfinished dimension that is extremely slightly larger than the specified finished dimension.

Further, the billow work 11 can also be molded in the same manner as the above-mentioned outer.

(D) Description of the finishing part 15 The finishing part 15 has three parts: inner, outer, and pillow.
It finishes a seed work 11 to a predetermined size, and the finishing portion of each work is assembled into a unit and attached according to the work 11 to be finished.

The finished part 15 in FIGS. 1, 2, 13, and 14 shows the case of the above-mentioned inner.
It is provided with a supply rod 91 that receives the workpiece 11 supplied from 0 and conveys it to a finishing position, a holding table 92 that holds the supplied workpiece 11, and a punch 93 that performs finishing processing on the held workpiece 11.

The above-mentioned supply rod 91 has a fixed wall 94 at its base end.
It is fixed to a rotating shaft 95 which is pivotally connected to the holder 95, and an L-shaped receiver 96 for receiving the molded work 11 is connected to the free end.

The above-mentioned supply rod 91 moves from the above-mentioned supply position of the shooter 90 to the finishing position of the holding table 92,
Furthermore, after the finishing process, it moves to a discharge position set at the bottom of the shooter 90.

Further, the other end of the aforementioned rotation shaft 95 is connected to a fixed wall 94.
A lever 97 is fixed to this extending portion, and a piston rod of a cylinder 98 pivotally connected to the fixed wall 94 is connected to the lever 97, and the above-mentioned supply rod is driven by driving this cylinder 98. 91 is moved.

The aforementioned pedestal 92 has three pieces 92a, 92c, 92.
c, and a through hole 99 is formed in the center of these three pedestals. Further, the pedestal 92b at the intermediate position has a cutout at a portion where the holder 96 of the supply rod 91 described above enters and exits.

Since the workpiece 11 to be molded is an inner,
The through holes 99 of the front and rear pedestals 92a, 92c are formed to be smaller than the outer diameter of the workpiece 11 and larger than its inner diameter.
Receive workpiece 11 with the lip of 9.

The punch 93 described above has an outer diameter on the tip side that is the molded part 1.
The punch 93 is formed smaller than the inner diameter of the work 11 formed in 3, and the outer diameter on the rear end side is formed to the finished outer diameter of the inner.By inserting this punch 93 into the inner diameter of the work 11, the work 11 is inserted into a predetermined inner diameter. Finished in.

The punch 93 described above is a finishing cylinder 101.
The piston rod 102 is removably fitted to the tip of the piston rod 102, and can be replaced depending on the workpiece 11 to be molded.

The above-mentioned finishing cylinder 101 is attached to a fixed wall 103 that is opposed to the above-mentioned fixed wall 94 at a predetermined interval.

Finishing part 15 of the inner constructed as described above
The work 11 supplied from the shooter 90 of the forming section 13 in the previous stage, that is, the unfinished inner, is received by the receiver 96 of the supply rod 91, and is supplied to the intermediate receiver 92b arranged for finishing.

Then, by operating the cylinder 101, the punch 93 is released.
As the punch 93 moves forward and passes through the through hole 99 of the pedestal 92, the punch 93 penetrates the inner diameter part of the workpiece 11, that is, the inner diameter part, and finishes the inner diameter part to the finished dimensions, and when the insertion of the punch 93 is completed,
The punch 93 retreats.

When the finishing of the workpiece 11 is completed, the supply rod 9
1 descends to a discharge position further below the position of the shooter 90, drops the work 11 placed on the receiver 96, and completes one finishing process.

15 and 16 show a finishing part 15a for finishing the outer, and this outer finishing part 15a is made into a unit and replaced with the inner finishing part 15 described above.

In the above-mentioned outer finishing part 15a, the die 105 attached to the fixed wall 94a by the attachment member 104 has an inner diameter slightly larger than the outer diameter on the inlet side and an inner diameter 106 on the outlet side which is the finished dimension of the outer. By inserting an unfinished outer into the die 105, the outer diameter is narrowed down to a predetermined finishing dimension and finished.

A horseshoe-shaped holder 107 is fixed on the entrance side of the die 105 with its opening facing toward the previous stage shooter 90.
receives the outer material supplied from the former molding section 13 via the shutter 90 at the inlet side of the die 105.

Furthermore, a receiving plate 108 is located inside the aforementioned die 105, and a piston rod 110 of a cylinder 109 is connected to the back side of this receiving plate 108.

The above-mentioned receiving plate 108 is located at the entrance side of the die 105 and supports the outer workpiece 11 supplied to the holder 107 so that it does not fall over, and when the outer workpiece 11 is inserted into the die 105, it retreats in accordance with the insertion. This allows for finishing of the outer surface.

A punch 111 is provided on the outside of the holder 107 described above.
are facing each other, this punch 111 is connected to a piston rod 113 of a finishing cylinder 112,
Further, this slider 112 is fixed to a fixed wall 103a.

Outer finishing portion 15a configured in this way
When the outer workpiece 11 is supplied to the holder 107, the outer workpiece 11 is prevented from falling between the receiving plate 108 and the punch 111, and then the receiving plate 108
By setting the side cylinder 109 in a non-driving state and driving the finishing cylinder 112, the unfinished outer with the punch 111 advanced is inserted into the die 105, and the outer is narrowed to a predetermined size and finished. It falls from the exit side of the dice 105.

After that, the cylinder 109 is driven and the receiving plate 1
08 is moved to the entrance side of the dice 105, and 1
The final finishing process is completed.

FIG. 17 shows a finishing part 15b for finishing the pillow, and this finishing part 15b is also made into a unit and can be replaced in the same way as the previous finishing parts 15 and 15a.

The above-mentioned pillow finishing part 15b has a pair of dies 114a and 114b divided into two, one die 114a is fixed to the fixed wall 94b via a mounting member 115, and the other die 114
b is attached to the tip of the piston rod 118 of the finishing cylinder 117 via an attachment member 116.

At the center of each of the above-mentioned dies 114a, 114b, holders 119, 119 are hydraulically operated.
are supported so that they can go in and out, and these holders 11
9, 119 holds the supplied pillow work 11.

At the bottom of the opposing holders 119, 119,
A supply rod 120 is provided which moves up and down to supply the pillow supplied from the forming section 13 between the dies 114a and 114b, and is driven via a suitable crank mechanism.

Pillow finishing part 15b configured in this way
receives the pillow supplied from the former molding section 13 via the shooter 90 through the supply rod 120, and places it in the holder 11 between the dies 114a and 114b.
9,119, and the holder 119,119
is hydraulically operated to clamp the pillow, after which the supply rod 120 is retracted to the receiving position.

Next, the finishing cylinder 117 is operated to move the movable die 114b to the fixed die 1.
14a side, press the pillow, release the hydraulic pressure of the holders 119, 119, and further increase the pressure of the dies 114a, 114b to finish the pillow into a predetermined shape.
14a, 114b are released, the pillow is dropped, and the holders 119, 119 are returned to their initial positions by hydraulic operation, thereby completing one pillow finishing process.

(E) General description of the embodiment In the embodiment configured as described above, the work 11 is inserted through the mandrel 32, and is pressed against the outer peripheral surface of the forming roller 31, and is rolled into an unfinished shape. , forming roller 31
The contact area between the workpiece 11 and the workpiece 11 is convex, and the contact area is reduced, making it possible to perform sufficient rolling with a small pressure.The hydraulic mechanism and mechanical structure can be configured accordingly, making it possible to downsize the equipment. can.

Furthermore, at the initial stage of processing the work 11, since the inner and outer circumferences of the work 11 are unprocessed, the circumferential speed of the work 11 becomes faster than the forming roller 31, and a difference in circumferential speed occurs between the work 11 and the forming roller 31. Since a one-way clutch 84 is interposed in the drive system of the forming roller 31, the high circumferential speed of the workpiece 11 is transmitted to the forming roller 31, thereby freeing the one-way clutch 84, and as a result, , work 11 and forming roller 31
The circumferential speed can be made the same as that of the

Moreover, when the circumferential speed of the forming roller 31 is high,
Similarly to the above, the one-way clutch 85 interposed in the drive system on the support roller 33 side becomes free, and the circumferential speeds of the workpiece 11 and the forming roller 31 can be made the same.

Therefore, no matter how much variation occurs in the circumferential speed between the workpiece 11 and the forming roller 31, both will always have the same circumferential speed, and the workpiece 11 due to the variation in circumferential speed will always have the same circumferential speed.
There is no vibration, deformation, eccentricity, etc., and a high-quality ring can be formed.

Furthermore, if the workpiece 11 is an inner one, the forming roller 31 may be formed with a convex shape that forms a roll receiving surface, or a surface that forms an inner diameter or an outer diameter. Furthermore, the inner diameter of the inner, outer diameter, and outer diameter of the pillow are finished to the specified shape using a formwork such as a punch or die, so various unfinished workpieces 1
One molding device can be used in common.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a front view of a bearing wheel forming device, Fig. 2 is a plan view thereof, Fig. 3 is a partially sectional front view of the supply section, and Fig. 4. 5 is a partially sectional side view of the forming part, FIG. 6 is a partially sectional side view of the forming roller side, FIG. 7 is a sectional side view of the mandrel, and FIG. The figure is a partial cross-sectional plan view of the gearbox.
Figure 9 is a schematic front view of the drive unit, Figures 10 and 11.
The figure is a partial cross-sectional plan view showing the inner molding process.
Fig. 12 is a partially sectional plan view showing the outer molding process, Fig. 13 is a partially sectional side view of the inner finished part, Fig. 14 is its front view, and Fig. 15 is a part of the outer finished part. A plan view of the cross section, Fig. 16 is Fig. 15
A sectional view taken along the line A-A in the figure, and FIG. 17 is a side view of the pillow-finished portion. 11... Workpiece, 31... Forming roller, 32...
...Mandrel, 33...Support roller, 34,
49...Ring body forming part, 35, 50...Regulating surface, 6
6...Roller (sliding surface), 84, 85...One-way clutch.

Claims (1)

[Scope of Claims] 1. A forming roller having a ring forming part formed on its central circumferential surface; a forming roller facing the forming roller such that it can move toward and away from the forming roller, and having a ring forming part formed on its central circumferential surface; Three rotating elements are arranged in parallel on a plane: a mandrel with a surface formed thereon, and a single support roller that is placed opposite to the back side of the mandrel and forms a sliding surface that contacts the regulating surface of the mandrel. and are rotatably supported, respectively, and configured to perform ring forming only between the ring forming part of the forming roller and the ring forming part of the mandrel, and each of the forming roller and the support roller A bearing wheel forming device that transmits rotational force through a one-way clutch that absorbs variations in circumferential speed between the workpiece and forming roller.