JP2622504B2 - Drawing machine for work with flange - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawing apparatus for performing drawing from a peripheral portion of a work with a flange at a position below the flange.

[0002]

2. Description of the Related Art As a method for fixing two works which are fitted to each other, there is known a drawing process in which an end peripheral wall of an outer work is narrowed and brought into close contact with an outer periphery of an inner work to join the two works. Have been.

[0003] Conventionally, a drawing apparatus for drawing an end of an outer work is provided with an upper and lower movable upper and lower squeezable rollers on the upper side of the outer work, and lowers the revolved squeezing roller. The end of the outer work is brought into contact with the end of the outer work, and the peripheral roller of the outer work is narrowed inward by the drawing roller so as to bend inward.

[0004]

In the conventional drawing apparatus, the drawing roller is lowered from the upper part of the outer work to perform the drawing. Therefore, a flange is provided on the upper part of the inner work. If it is necessary to join the inner work and the outer work at a position lower than the flange, there is a problem that the flange interferes and drawing cannot be performed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an apparatus for drawing a work with a flange, which has a flange at an upper portion and can draw from a position below the flange from outside.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a support base which clamps a work having a flange and moves up and down, and a support base which is located above the support base. It consists of a drawing machine that performs drawing from the outside to a position below the flange of the work held at the ascending position, and the drawing machine is integrated with the head at the lower end of the rotating shaft vertically supported by the fixed support. A squeezing roller is rotatably mounted on a movable base fixed to rotate and mounted on the lower surface of the head so as to be movable in a radial direction, and is externally fitted on the rotary shaft so as to be movable in an axial direction. The inserted elevating cylinder and a driving device attached to a fixed support for imparting vertical movement to the elevating cylinder are coupled in the up and down direction while allowing the rotation of the elevating cylinder, and the base is pivoted to the head. Raise one end of L-shaped arm The other end is locked to the movable table, and the L-shaped arm is swung by the vertical movement of the elevating cylinder to move the aperture roller of the movable table toward and away from the rotational axis of the head. Is adopted.

[0007]

[Function] A work with a flange is fixed on a support base, and the work is lifted to a raised position by raising the support base.

In the drawing machine, the lifting cylinder is at a lowered position and the drawing roller is at a position distant from the rotation axis of the head.
Standing outside the flange below the raised workpiece.

When the rotary shaft is rotated in this state, the aperture roller revolves around the work, and when the elevating cylinder is moved up by the driving device, the movable base and the aperture roller attached thereto are rotated by the rotation of the L-shaped arm. Moves toward the rotation axis of the head, and the squeeze roller presses the work at a position below the flange,
By orbit, rotation, and movement toward the rotation axis,
Narrow down the peripheral wall of the work.

When the drawing process is completed by the drawing roller,
The work is completed by lowering the elevating cylinder, moving the support base and the squeezing roller attached thereto away from the work, and then lowering the work together with the support base.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIGS. 1A and 1B show the entire structure of a drawing apparatus, in which a support base 2 for a work a is provided on a table 1 and a portal frame 3 erected on the table 1 is drawn. 4 is attached so as to be located above the support base 2.

First, a workpiece a to be subjected to drawing processing
As shown in FIGS. 3 and 5, a large-diameter portion b is formed on the outer periphery of the upper portion of the main body, and a horizontal flange c having a larger diameter than the large-diameter portion b is formed on the upper end.
Metal inner work a ₁ having
A metal-made outer workpiece a ₂ Metropolitan fitted around the _first body, the tubular portion d next to the straight outer workpiece a ₂ the upper end fitted into the large-diameter portion b, the inner workpiece a ₁ when combining the outer workpiece a _2, will protrude the upper end of the cylindrical portion d is above the the upper surface of the large diameter portion b, subjected to the drawing this protruding portion parts as in FIG. 5 (a), the aperture processed so that the inner work a ₁ and the outer workpiece a ₂ are immobilized by.

Therefore, the portion of the work a where the drawing is to be performed is under the condition that the diameter is smaller than the flange c at a position below the flange c.

The support table 2 is supported by a horizontal guide 5 provided on the table 1, and is moved up and down by a vertical guide 8 on a movable plate 7 which can be moved back and forth by a cylinder 6. The platform 9 is placed and the elevator 9
A work placement part 10 is provided at a center position on the upper surface of the work piece. The work a on the placement part 10 is moved toward and away from each other by hydraulic cylinders 11 at positions on both sides of the placement part 10 when approaching. A pair of clamps 12 are provided to be clamped from both sides.

The support table 2 can be moved back and forth on the table 1 by the cylinder 6, and when it is stopped at the retracted position, it faces directly below the drawing machine 4, and the vertical axis of the drawing machine 4 and the work a Axis becomes coaxial, and the table 1
At a position directly below the support 2 which stops at the retreat position,
A cylinder 13 is provided to push up the elevating table 9 and lift the work a to a predetermined height position.

As shown in FIGS. 1 to 4, the drawing machine 4 vertically fixes a cylindrical fixed support portion 14 to the upper horizontal rail 3a of the portal frame 3, and moves the support portion 14 up and down. A motor 16 fixed to the upper cross bar 3a and a rotating shaft 1 that rotatably support a cylindrical rotating shaft 15 that penetrates the support portion 14 are provided.
5 is interlocked via a pulley and a belt, and the head 17 is fixed to the lower end of the rotating shaft 15 so as to rotate integrally.

The head 17 is provided with projections 18 projecting in three directions around the circumference at an equal angle.
As shown in the figure, a pair of radially parallel rails 20 and 20 are fixed at both sides sandwiching the notch 19 on the lower surface of each of the protrusions 18 by forming a bifurcated shape with the radial notch 19. The movable base 21 which is held by the rails 20 and is movable in the radial direction is attached to the lower part of each.

An aperture roller 22 is rotatably mounted on each of the movable tables 21 at a position on the inner side facing the axis of the rotary shaft 15. As shown in FIG. 3, the squeezing roller 22 has a disk shape having a diameter larger than the protrusion amount of the flange c on the workpiece a, and an arc-shaped concave forming surface 22a is provided in the lower half of the outer peripheral surface. And the concave portion 23 of the movable base 21
The center shaft 24 is supported by the movable base 21, so that a little less than half the amount protrudes from the inner surface of the movable base 21.

As shown in FIG. 3, a lower part of the rotating shaft 15 is rotated integrally with the rotating shaft 15,
On the other hand, a driving device 27 for vertically moving the elevating cylinder 25 is mounted on a plate 26 fixedly attached to the lower end of the fixed support part 14 by externally inserting a cylindrical elevating cylinder 25 which is vertically movable along the axial direction. Fixed.

The driving device 27 uses a plurality of hydraulic cylinders, and fixes the piston rod 28 on the plate 26 with the piston rod 28 facing downward. Plate 29 and piston rod 28
And a plurality of brackets 30 fixed to the lower surface of the intermediate plate 29, rollers 32, 32 for holding a flange 31 provided on the outer periphery of the upper end of the elevating cylinder 25 from above and below are pivoted.

The lifting cylinder 25 is rotatably coupled to the intermediate plate 29 so as to move integrally in the vertical direction by clamping the flange 31 between the rollers 32, 32. It will move up and down in the state.

A pair of opposing walls 33 are provided on both sides of the slit 19 on the upper surface of each projection 18 of the head 17,
The bent base of the L-shaped arm 34 housed between the opposed walls 33 is
The L-shaped arm 34 is supported by a shaft 35 erected between the opposing walls 33, and can swing about the shaft 35 as a fulcrum.
The trochanter 36 pivoted to one end of the arm 34 is attached to the lifting cylinder 2
The trochanter 38 engaged in the concave notch 37 provided on the lower outer surface of the lower part 5 and pivoted to the other end of the L-shaped arm 34 engages in the groove block 39 fixed to the upper surface of the movable base 21. doing.

Accordingly, when the elevating cylinder 25 moves up and down, the L-shaped arm 34 swings about the shaft 35 as a fulcrum, and the movable table 21 moves forward and backward in the radial direction of the head 17.

An elevating shaft 40 extends vertically through the rotating shaft 15 and projects from the lower surface of the head 17.
A disc-shaped work holding plate 41 is fixed to the lower end of the cylinder 42. The upper end of the elevating shaft 40 is connected to a piston rod 43 of a cylinder 42 fixed to the upper part of the portal frame 3 as shown in FIG. The elevating shaft 40 moves up and down due to expansion and contraction, and the upper end surface of the raised work a is pressed and fixed by the holding plate 41.

The drawing apparatus according to the present invention is configured as described above. Next, a drawing method will be described.

As shown in FIGS. 1A and 1B, the table 1
The work a is supplied onto the work mounting portion 10 of the support 2 in a state where the support 2 stands by at the front of the work, and the clamps 12 on both sides are actuated to hold the work a in an upright position. .

In this state, the cylinder 6 contracts,
Stops at the retracted position, the work a faces directly below the drawing machine 4, the cylinder 13 is extended, the elevating table 9 is pushed up, and the work a is held at the raised position.

At this time, in the drawing machine 4, the lifting cylinder 25 is lowered by the extension of the driving device 27, the movable base 21 and the drawing roller 22 attached thereto are expanded in three directions, and the lifting shaft 40 is also in the raised position. is there.

The raised work a has a positional relationship in which the upper end flange c is slightly higher than the draw roller 22, and the drawing machine 4 first moves the cylinder 42 up and lowers the presser plate 41 by lowering the lifting shaft 40. By pressing the upper end surface of the workpiece a, the workpiece a held by the clamp is more reliably held.

Next, the motor 16 is activated, the rotary shaft 15 and the head 17 and the lift cylinder 25 is rotated together, squeezing roller 22 serving as a flared-shaped three-way, the outer workpiece a ₂ in the workpiece a tubular Revolves outside the part d.

When the rotating shaft 15 rotates, the driving device 27 is contracted, and when the elevating cylinder 25 is raised, the L-shaped arm 3 is moved.
With the rotation of 4, each movable base 21 and the aperture roller 22 attached thereto move closer to the rotation axis of the head 17 below the flange c, and the aperture roller 22 is moved by this movement in FIG.
As in (A), since the outer peripheral surface abuts the upper end outer peripheral surface of the cylindrical portion d of the outer roller a _2, and roll while revolving outer tubular portion d, moves further inward, The cylindrical portion d is pushed inward to narrow down, and the squeezing roller 22
By further moving inward, as shown in FIG. 5B, the pushed cylindrical portion d is further pressed by the forming portion 22a.

[0033] Thus, the distal end of the tubular portion d is narrow portions e becomes bent inwardly along the top of the large diameter portion b of the inner workpiece a _1, inner work a ₁ by the diaphragm portion e
An outer workpiece a ₂ will be integrally connected.

When the drawing-in is completed, the driving device 27 extends and the elevating cylinder 25 descends, and each movable table 21 and the drawing roller 22 attached thereto expand and separate outward, and the outer periphery of the drawing roller 22 Moves outside the outer periphery of the flange c.

When the squeezing roller 22 spreads and separates, the power supply to the motor 16 is stopped to stop the rotating shaft 15 and the cylinder 42 is contracted, and the lifting shaft 40 is pulled up to release the pressing of the work a by the holding plate 41. Thereafter, the cylinder 13 contracts and the support base 2 descends, moves to the front position of the table 1 at the descending position, and the work a can be taken out if the clamping by the clamp 12 is released.

[0036] Note that FIG. 5 (A), (B), in the narrowing of the tubular portion d of the outer workpiece a _2, just showed side to narrow substantially right angle inward, as shown in FIG. 5 (C) ,
If the cylindrical portion d is made slightly longer and the outer peripheral surface of the drawing roller 22 is formed in the upper half large-diameter forming portion 22b and the lower half small-diameter forming portion 22c, a two-stage drawing process can be performed. I can do it.

[0037]

As described above, according to the present invention, it is possible to perform the drawing at the lower portion of the flange of the work having the flange from the outer periphery by escaping the flange.
Drawing work of flanged work can be performed without any trouble.

[Brief description of the drawings]

FIG. 1A is a front view showing the entire structure of a drawing apparatus, and FIG. 1B is a side view thereof.

FIG. 2 is a longitudinal sectional front view in which main parts of the above are enlarged.

FIG. 3 is a longitudinal sectional front view in which main parts of the above are further enlarged.

FIG. 4 is a bottom view of the head.

FIG. 5A is a longitudinal sectional view showing a relationship between a work and a draw roller at the time of drawing processing, and FIG. 5B is a longitudinal sectional view showing a relationship between the work and the draw roller when drawing is completed; ) Is a vertical cross-sectional view of the drawing completion state showing another example of drawing processing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Table 2 Support stand 4 Drawing machine 9 Elevating stand 10 Work mounting part 14 Fixed support part 15 Rotating shaft 16 Motor 17 Head 18 Projection 21 Movable stand 22 Drawing roller 25 Elevating cylinder 27 Elevator 34 L-shaped arm

Claims (1)

(57) [Claims] 1. A support table which moves up and down by clamping a work having a flange, and a diaphragm which is located at an upper portion of the support table and which is lower than a flange of the work held at a raised position by the support table from the outside. It consists of a drawing machine that performs processing, and the drawing machine fixes the head so that it rotates integrally with the lower end of the rotating shaft vertically supported by the fixed support part, and can move in the radial direction on the lower surface of this head A squeezing roller is rotatably mounted on a movable base mounted so that it can be moved in the axial direction on the rotary shaft, and a fixed support for imparting vertical movement to the elevating cylinder A drive attached to the unit is vertically coupled in a state allowing rotation of the lifting cylinder, one end of an L-shaped arm having a base pivoted to the head is locked to the lifting cylinder, and the other end is a movable base. L-shaped by vertical movement of lifting cylinder A drawing work apparatus for a work with a flange, which moves the drawing roller of the movable base toward and away from the rotation axis of the head by swinging the arm.