JPH105887A - Spinning machine for inclining machining roller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spinning machine having a supporting structure high in rigidity and rapidly inclining a machining roller rapidly by an arbitrary angle. SOLUTION: One side of a supporting shaft 15 of a machining roller 2 is supported rotatively by using a spheric bearing 18, and another side is supported movable toward the direction of inclining the supporting shaft 15 by using a cam mechanism of eccentric cams 21, 22 composed at least doubly, thus the machining roller 2 is inclined. As the inclining mechanism, with wedge, electrostriction or magnetostriction element, hydraulic or pneumatic cylinder, and eccentric cam are exemplified in addition to the double eccentric cam mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spinning machine in which a processing roller is inclined by inclining a bearing shaft of the processing roller.

[0002]

2. Description of the Related Art Spinning, which is a field of plastic working, is a working method in which a working roller is pressed against the outer peripheral surface of a rotating circular material and the material is formed into a desired shape by ironing. In recent years, vehicle wheels made of aluminum alloy have been widely used, and the forming of the rim portion is largely performed by spinning. 1 vehicle wheel
They are distinguished by the number of parts, such as pieces, two pieces, three pieces, etc., and there are many types of materials, such as discs and those having a substantially H-shaped cross section. When spinning,
A mandrel with a rim shape is provided on the rotating shaft, the material is fixed to the mandrel, the processing roller is pressed against the outer periphery of the mandrel while following the mandrel shape, and the material is extended and formed while swinging in the direction parallel to the rotating shaft. I have. In principle, it is sufficient to provide one processing roller, but in order to shorten the time required for spinning, a plurality of processing rollers with different shapes are arranged to press against the surface of the material, and A processing roller driving unit is provided so as to be able to press in an inclined direction. As described above, since the processing roller oscillates in the direction of the rotation axis while being pressed, a force is applied to the bearing shaft of the processing roller, so that a force acts as perpendicularly to the support shaft of the processing roller as possible. It is desirable to do so. In particular, in the case of a wheel in which the gradient from the rim well to the flange of the vehicle wheel changes sharply, the load on the processing roller is further increased.Therefore, inclining the axis of the processing roller in accordance with the direction of operation reduces the pressing force. It can be effectively applied to the material.
On the other hand, since the spinning machine is a large-sized processing machine and the lubricant scatters during processing and there is little extra space around the processing roller, it is desirable to incorporate a simple and highly rigid processing roller tilt mechanism. I have.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a spinning machine having a highly rigid support structure capable of quickly tilting a working roller at an arbitrary angle.

[0004]

According to the present invention, one end of a bearing shaft of a processing roller is rotatably supported by using a spherical bearing, and the other side is formed by using an eccentric cam mechanism having at least a double structure. The processing roller is tilted by supporting the support shaft so that it can move in the tilting direction.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The amount of movement of the movably supported portion is achieved by providing a function of converting the amount of rotation of at least two eccentric cams.

It is also possible to move the shaft in the direction of tilting the shaft by moving at least two wedges instead of the double eccentric cam mechanism. Preferably, the two wedges are provided at adjacent positions or at opposing positions.

[0007] At least two electrostrictive elements or magnetostrictive elements can be used instead of the double eccentric cam mechanism.

In addition, the eccentric cam mechanism is moved by at least two hydraulic or pneumatic cylinders instead of the double eccentric cam mechanism.

In addition, it can be achieved by using at least two eccentric cams instead of the double eccentric cam mechanism.

In order to increase the rigidity of the bearing, a sleeve for holding the bearing shaft is provided.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a sectional view showing a tilting mechanism 1 of a support shaft of a processing roller in a spinning machine of the present invention, and FIG. 2 shows an arrangement state of a processing roller 2 and a tilting mechanism 1 in a spinning machine. The processing roller 2 is fixed to the processing roller mounting table 12 via the tilting mechanism 1. Further, the processing roller mounting base 12 is mounted on a roller support 14 inserted through the roller head 13. The roller head 13 can move parallel to the axis of the drive shaft 8, and the roller support 14 is pressed by a hydraulic mechanism in a direction perpendicular to the drive axis.
As an example, a spinning example of a light alloy wheel will be described. The wheel body 3 is forged, has a substantially H-shaped cross section, and is formed of a disk portion 4 and a rim body 5 which are integrally formed. The wheel body 3 is held between mandrels 6 and 7 and is fixed to a drive shaft 8 and a driven shaft 9, respectively. By rotating the drive shaft 8, the wheel body 3 rotates and the processing roller 2
The inner rim 10 and the outer rim 11 are formed by swinging in the direction of the rotation axis while pressing. Although only one processing roller 2 is shown in the figure, three processing rollers and drive units having different cross-sectional shapes are usually provided to reduce the spinning processing time.

Next, the tilting mechanism 1 for the support shaft of the processing roller will be described. In FIG. 1, a processing roller 2 includes a bearing shaft 1.
5 is fixed. One side of the bearing shaft 15 is supported on a cylindrical sleeve 16 by a bearing 17 and further has a sleeve 16.
Is rotatably supported by a housing 19 by a spherical bearing 18. The other side of the bearing shaft 15 is supported by a sleeve 16 with a bearing 20, and further on the outer peripheral surface of the sleeve 16,
The eccentric cams 21 and 22 are double-structured, and their outer peripheral surfaces are supported by the housing 19 via spherical roller bearings 30. The eccentric cams 21 and 22 are supported by bearings 23 and 23-1 so that they can rotate individually.

Each of the eccentric cams 21 and 22 is formed with a flange, and the flanges form gears 24 and 25 (FIG. 1). The gear 24 has a small gear 2
6 are engaged with each other, and the gear 25 is engaged with a small gear 27. The small gears 26 and 27 are flexible joints 28-a and 28
-B through the servo motors 29-a and 29-b, respectively.
Is appropriately driven. Accordingly, since the eccentric cams 21 and 22 individually transmit an arbitrary rotation amount from the servomotor, the point B of the axis moves a controlled length to an arbitrary position. The point A of the shaft center is the center point of the spherical bearing 18, and the processing roller shaft 15 is inclined around the point A.

FIG. 3 is a cross-sectional view showing the operating state of the eccentric cam mechanism. The eccentric cams 21 and 22 indicate the point B as P1.
Have the same eccentricity δ. 3 and 4, the center P2 of the inner diameter of the eccentric cam 22 is located at -δ on the Y axis, and the center P3 of the inner diameter of the eccentric cam 21 is located at + δ on the Y axis with respect to P2, that is, the origin (eccentric). (The center of the outer diameter of the cam 22) P1.

FIG. 5 shows a method of positioning the center P3 (also the center of the sleeve) of the inner diameter of the eccentric cam 21 at an arbitrary position inside a circle having a radius 2δ with respect to P1. FIG. 5 shows that the eccentric cam 22 is turned by + θ in the counterclockwise direction and the eccentric cam 21 is turned by -θ in the clockwise direction, and as a result, P3 comes to the position of r on the X axis. r = 2δ × tan θ or θ = tan ⁻¹ (r / 2δ) If θ moves by 0 to 90 °, r moves between 0 and 2δ. By rotating both eccentric cams synchronously while maintaining the mutual relationship of this state, P3 can be moved to a position making an arbitrary angle with respect to the X axis.

According to the present embodiment, when a worm and a worm wheel, gears, etc., which are low in rigidity and are easily worn and easily cause backlash, like the turning tilt axis of a normal 5-axis controller, are directly pressed. In addition to receiving the reaction force and not directly receiving the load of the slide or the work, the tilting mechanism of the processing roller shaft having high rigidity can be provided, and the adverse effect of adding the tilting mechanism can be avoided.

FIGS. 6 and 7 show another embodiment. In the above-described example, a double eccentric ring is used to incline the processing roller shaft 15, but in this example, two piezoelectric elements 35, 35-1, two in each of the X and Y directions are opposed to each other. 3
5-2 and 35-3. In this case, the paired piezoelectric elements 35 and 35-2, and 35-1 and 35-3 are set so that when one side is expanded, the other side is moved in the direction of contraction. 36 is a linear bearing, another 1
The member 37 forms a part of the linear bearing 36 and allows the sleeve 16-1 to be tilted by the cylindrical surface 38, for allowing the movement of the pair of piezoelectric elements 35-1 and 35-3. Such a configuration is provided for each linear bearing portion 36-1,
The same applies to 36-2 and 36-3. In addition, the sleeve 16-1 can be moved by using two adjacent piezoelectric elements 35 and 35-1, and 35-2 and 35-3 instead of two opposing piezoelectric elements. In this case, the extension length and direction of the two piezoelectric elements are combined.

FIG. 8 shows another embodiment. The movement for imparting an inclination to the sleeve 16-1 is performed by a total of four sets of wedges, two sets opposing each other in the X and Y axis directions. X
To describe the movement in the axial direction as an example, the wedge 41 and the wedge 4
2 have opposite gradients to each other,
4 and 45, and is driven by a servomotor (not shown) via a ball screw 46. The wedges 41 and 49 are supported by linear bearings 47 and 48 and 47-1 and 48-1, respectively, so as to move lightly. 50 is a wedge, 5
Reference numerals 1 and 52 are parts of the housing 19. In this example, when the drive units 43, 44, 45 move in the direction of arrow F by the rotation of the ball screw, the wedges 41, 49 move together in the same direction, and the sleeve 16-1 moves in the left direction in FIG. (In the direction of arrow G). Also in this example, as described above, the movement amount can be determined not only by two wedges placed at positions where the wedges are opposed to each other but also by a pair of adjacent wedges. Also in the embodiments described below, the drive mechanism is not limited to being provided at the opposing position.

FIG. 9 shows a pair of hydraulic cylinders in the X-axis direction in which the piezoelectric element 35 of the example shown in FIG. 6 is replaced by a hydraulic cylinder 55. 56, 57,
56-1 and 57-1 are pistons. In this case, the amount of movement for tilting the sleeve 16-1 is not arbitrary, but a combination of three positions (+ δ, 0, -δ) in the X-axis direction and three positions (+ δ, 0, -δ) in the Y-axis direction. Limited to the position. FIG.
When the pressure oil is introduced into the cylinder oil holes 58 and 58-1 on both sides, the sleeve 16-1 is maintained at the zero position.
Also, when pressure oil is introduced into the oil hole 59 of one cylinder and the pressure oil passing through the oil hole 58-1 of the opposite cylinder is eliminated, the sleeve 16-1 moves in the direction of -δ. When pressure oil is introduced into the oil hole 59-1 of the opposite cylinder and all the pressure oil in the oil holes 58 and 59 is turned off, the cylinder moves in the + δ direction.

An example in which the sleeve 16-2 is moved using a single eccentric cam instead of the double eccentric cam will be described. The outline is similar to the above-described example using the piezoelectric element, but the amount of movement of the sleeve 16-2 can be set arbitrarily. That is, in FIG. 10, the cylindrical surface 3 forming a part of the linear bearing is formed on the linear bearing 36 sliding in contact with the sleeve 16-2.
8 (see FIG. 7), an eccentric cam outer ring member 60 is provided, and a needle bearing 61 and an eccentric cam 62 are incorporated therein. An eccentric drive shaft 63 is formed integrally with the eccentric cam 62. The eccentric drive shaft 63 is supported on the sleeve 2 by using a rotary bearing, and is driven by a servomotor. This eccentric cam mechanism has at least X, Y
A total of two sets are provided, one set each in the axial direction. Assuming that the amount of eccentricity is δ, the amount of movement of the sleeve 16-2 can be moved from 0 to δ in an arbitrary direction.

[0121]

As described above, according to the spinning machine of the present invention, the working direction of the working roller can be quickly inclined by numerical control, and the rigidity can be increased by adding a sleeve to the bearing shaft of the roller. High spinning machine. When using this spinning machine, for example, when performing spinning processing in the manufacturing process of a light alloy wheel, when applying the pressing force of the spinning roller along the shape of the wheel, the pressing force always acts in the direction perpendicular to the bearing shaft. Since control can be performed, smooth and efficient spinning can be performed.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of a tilting mechanism of a support shaft of a processing roller in a spinning machine according to the present invention.

FIG. 2 is a partial cross-sectional view showing a state in which the spinning machine of the present invention is used for spinning a vehicle wheel.

FIG. 3 is a cross-sectional view showing an operation state of the double eccentric cam mechanism.

FIG. 4 is a diagram for explaining the amount of eccentricity.

FIG. 5 is a diagram for explaining the amount of eccentricity.

FIG. 6 is a diagram showing an example in which a bearing shaft is tilted using a piezoelectric element.

FIG. 7 is a sectional view taken along line LL in FIG. 6;

FIG. 8 is a cross-sectional view showing an example in which the support shaft is inclined using a wedge.

FIG. 9 is a cross-sectional view showing an example in which a bearing shaft is tilted using a hydraulic cylinder.

FIG. 10 is a cross-sectional view showing an example in which the bearing shaft is tilted using two sets of opposing eccentric cams.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inclination device of bearing shaft 2 Working roller 12 Mounting stand 13 Roller head 14 Roller support 15 Bearing shaft 16, 16-1, 16-2 Sleeve 17 Bearing 18 Spherical bearing 19 Housing 20 Bearing 21, 22 Eccentric cam 23, 23 -1 Bearing 24, 25 Gear 26, 27 Small gear 28a, 28b Flexible joint 29a, 29b Servo motor 30 Spherical roller bearing 35, 35-1, 35-2, 35-3 Piezoelectric element 41, 42, 49, 50 Wedge 55 Hydraulic cylinder 56, 56-1, 57, 57-1 Piston 62 Eccentric cam 63 Eccentric drive shaft

Claims (7)

[Claims] 1. A support shaft of a processing roller is rotatably supported on one side by using a spherical bearing, and the other side is moved in a direction of inclining the support shaft by using at least a double eccentric cam mechanism. A spinning machine that tilts the processing roller by supporting as much as possible. 2. The spinning machine according to claim 1, further comprising a function of converting the amount of movement of the movably supported portion into the amount of rotation of at least two eccentric cams. 3. The spinning machine according to claim 1, wherein a structure in which the eccentric cam mechanism is moved by moving at least two wedges is used instead of the double eccentric cam mechanism. 4. The spinning machine according to claim 1, wherein a structure in which movement is performed by at least two electrostrictive elements, magnetostrictive elements, or the like is used instead of the double eccentric cam mechanism. 5. The spinning machine according to claim 1, wherein a structure that moves by at least two hydraulic or pneumatic cylinders is used instead of the double eccentric cam mechanism. 6. The spinning machine according to claim 1, wherein a structure that moves by at least two eccentric cams is used instead of the double eccentric cam mechanism. 7. The spinning machine according to claim 1, wherein a sleeve for holding the bearing shaft is provided on a bearing shaft of the processing roller.