JPH0796329A - Driving shaft connecting device of cold roll machine - Google Patents

Abstract

PURPOSE:To complete the connection to the roll shaft in one operation by sliding the intermediate stand on the common base, and to simultaneously execute the necessary position change according to the adjustment of the rolling reduction force of the roll stand. CONSTITUTION:Couplings 21, 22 connected to the driving system by an expansion type universal joint are mounted on coupling holders 14, 15 mounted on the linear guide which is slidable in the vertical direction in a fine adjusting manner in the horizontal and vertical direction. The couplings 21, 22 are arranged opposite to the ends of roll shafts 31, 32 by lowering the elevated coupling holders 14, 15 and stopping them by the guides 14d, 15d for the automatic alignment while an intermediate stand 10 to hold the couplings is slid on the common base 1. This constitution completes the connection to the roll shaft in one operation while automatically adjusting the height without reading or adjustment of the coupling height, and the couplings are free in motion in the vertical direction to allow free adjustment of the rolling reduction force during the rolling operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a drive shaft connecting device in a cold roll forming machine, in which a coupling connected to a drive system by a telescopic universal joint is mounted on a linear guide which can slide in the vertical direction. Mount it on the coupling holder so that it can be moved horizontally and vertically, and slide the intermediate stand that holds these to the common base while lowering the coupling holder to make the coupling face the roll shaft end and Since it is possible to complete the connection at once and the coupling is free in the vertical direction, it is possible to adjust the rolling force freely during the forming operation regardless of the change in the distance between the upper and lower roll axes. The present invention relates to a drive shaft connecting device for a roll forming machine.

[0002]

2. Description of the Related Art A cold roll forming machine (hereinafter referred to as a roll forming machine) is often used for forming metal members of various industrial products into various shapes, and usually a large number of forming roll stands (hereinafter referred to as rolls). The auxiliary equipment for material supply is connected to the upstream side of the molding line where a stand is installed, and the next process equipment such as punching, cutting and bending is connected to the downstream side.
In order to perform molding of a plurality of different shapes in one molding line, the number of roll stages corresponding to the shape and a dedicated molding roll are exchanged, and the vertical roll axis is adjusted to adjust the rolling force. It took time and effort.

Therefore, a plurality of roll stands are placed on a detachable sub-base on a common base, the forming rolls are exchanged and the adjustment is completed in advance off-line, and the sub-bases are exchanged to replace the common base. A so-called cassette type cold roll forming machine, which is connected to a drive source attached to, has been put into practical use. Further, in order to save labor, a plurality of the above-mentioned sub-bases are prepared, a dedicated forming roll is arranged for each shape to be formed, and the sub-bases are exchanged according to demand.

[0004]

SUMMARY OF THE INVENTION The so-called cassette type roll forming machine for exchanging the sub-base is intended to save labor by completing the exchange and adjustment of the forming roll in advance off-line. However, there is a problem that the sub-base replacement time is determined by the connection method and connection mechanism between the drive system provided on the common base side and the roll shaft of the roll stand on the sub-base side.

Conventionally, when a roll stand is driven by a motor, a universal joint for connecting the common base side speed reducer connected to the motor and the sub base side vertical roll shaft is connected to the common base side speed reducer. They are arranged, and it is necessary to connect the roll shaft and the universal joint by the number of roll stands × the number of upper and lower roll shafts, which requires a lot of labor and time. Therefore, a mechanism has been proposed in which an intermediate stand is provided on the common base side to support the coupling provided at the tip of the universal joint, and the sub base is slid on the common base to complete the connection with the roll shaft at once. However, especially when changing the distance between the upper and lower roll axes when changing the molding rolls,
If the coupling position of the intermediate stand is not accurately adjusted according to the change, the connection cannot be completed at once, especially if the number of roll stands placed on the sub-base increases, the connection can be done at once. It was extremely difficult to complete.

Further, the rolling force may be adjusted even after the operation of the line is started, and the coupling core needs to always change with the height change of the roll shaft even if a slight height change occurs. is there. Therefore, it is desirable that the intermediate stand and the coupling have a structure that is free at least with respect to the height position after the coupling, or a structure that can simultaneously perform the necessary position changes according to the adjustment of the rolling force of the roll stand.

The present invention solves the above-mentioned problems in the connection between the drive system provided on the common base side and the roll shaft of the roll stand on the sub-base side, regardless of the change in the distance between the upper and lower roll shafts, and a plurality of roll shafts. Even if it is a sub-base on which the roll stand is mounted, it is possible to slide the intermediate stand on the common base to complete the connection with the roll shaft at once, and it is necessary depending on the adjustment of the rolling force of the roll stand. It is an object of the present invention to provide a drive shaft connecting device for a cold roll forming machine having a structure capable of simultaneously performing various position changes.

[0008]

Means for Solving the Problems The inventor has a mechanism capable of coupling while automatically adjusting the height in the coupling operation with the drive shaft without reading and adjusting the coupling height. Furthermore, after coupling, the height of the coupling and the intermediate stand are automatically free, and as a result of various studies aimed at a mechanism that allows free adjustment of the rolling during molding work, the drive system and expansion joints are used for connection. The coupling holder is mounted on a coupling holder that is mounted on a linear guide that can slide in the vertical direction so that it can be moved horizontally and vertically, and the intermediate stand that holds these is pulled up while sliding it on the common base. Lowering and stopping with the guide for automatic centering, and facing the coupling to the roll shaft end, It is possible to complete the connection with the roll axis at one time while automatically adjusting the height without reading and adjusting the ring height, and since the coupling becomes free in the vertical direction, the vertical roll axis We have invented a mechanism that can freely adjust the rolling force during molding, regardless of changes in the distance.

That is, according to the present invention, in a drive shaft connecting device of a cold roll forming machine for connecting a drive system provided on a common base side and a roll shaft of a roll stand on a sub base side, a telescopic type connected to the drive system. An intermediate stand that supports the coupling attached to the other end of the universal joint is arranged on the common base so that it can move horizontally in the roll axis direction.An axial spline groove is formed on the inner peripheral surface and a spline groove is formed at the coupling inlet. Cylinder device equipped with a linear guide that can vertically slide the coupling holder that supports the coupling with detachable guide formed on the coupling holder so that it can move horizontally and / or vertically. A roll shaft that can be raised and lowered and the coupling holder is pulled up vertically to form a spline shaft. The guide bar provided on the coupling holder is positioned so that it comes into contact with the guide stopper provided on the roll stand side so that the coupling faces the end of the roll shaft when it is horizontally moved to the vicinity and lowered to bring the cup into contact with the cup. A drive shaft connecting device for a cold roll forming machine, wherein a ring and a roll shaft are spline-fittable.

[0010]

The operation of the drive shaft connecting device of the cold roll forming machine according to the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory view of a drive shaft connecting device according to the present invention as viewed in the molding line direction. FIG. 2 is an explanatory view of the intermediate stand as viewed from the roll axis direction. FIG. 3 is an explanatory view showing a fitted state of the coupling and the roll shaft. Here, the common bed 2 is arranged on the common base 1, and the sub-base 4 on which the roll stand 3 is mounted is detachably mounted on the common bed 2, and the roll stand 3 is provided adjacent to the sub-base 4. The slide base 5 fitted and mounted on the rail laid in the roll axis direction is slidably arranged. The slide base 5 is characterized by the drive shaft coupling device of the cold roll forming machine according to the present invention. An intermediate stand 10 is placed. Further, a bet 6 is arranged adjacent to the common bet 2 and a worm speed reducer 7 is arranged. The slide base 5 slides horizontally in traverse cylinders 8 arranged on the bed 6 of the worm speed reducer 7.

The intermediate stand 10 comprises a pair of support panels 11 and 11 standing upright as shown in FIG.
With the configuration in which the vertical surface 12 formed of a rectangular frame is formed on the side, the slide rails 13 and 13 are vertically arranged with the central opening of the vertical surface 12 interposed therebetween, and the slide rails 13 and 13 are mounted with linear guides in the vertical direction. Coupling holder 14,1
5 can be raised and lowered freely. Coupling holder 14,
A pair of wings 14a and 14
b, 15a, 15b are provided in parallel with the vertical surface 12 and in the horizontal direction, and a pair of lifting rods 1 that can be raised and lowered by an air cylinder 16 placed on the upper end of the intermediate stand 10.
7, 17 are loosely inserted in through holes provided in the wings 14a, 14b, 15a, 15b respectively, and the lifting rod 1
Metal fittings 18,1 which are fixed to the rods when 7,17 rises
8 is in contact with the lower ends of the wings 14a, 14b, 15a, 15b and simultaneously pulled up.

Couplings 21 and 22 are housed in the openings of the coupling holders 14 and 15 so that they can be finely moved in the horizontal and vertical directions, respectively. A predetermined gap is provided in the. The couplings 21 and 22 are spline bearings 21b and 22b formed of female involute splines.
Main body 21a, 22a rotatably supported by bearings
At the inlets of the spline bearings 21b and 22b, a pair of plate-shaped guide pieces 21c and 22c in which spline grooves are formed in the opening diameter are horizontally opposed to each other. Intermediate stand 10 of the roll shafts 31 and 32 of the roll stand 3
The shaft end on the side is a male spline shaft, and a short cylindrical spline guide (not shown) having a spline groove on the outer peripheral surface is bolted to the tip end of the male spline shaft. The shape of at least one of the spline groove portions of the spline guide and the spline guide is such that the fitting side is sharpened into a blade shape, and when the crest portions of both spline grooves collide with each other, the couplings 21 and 22 are fitted while rotating. It is configured to be possible. Coupling body 21
The other ends of the a and 22a are connected to the output shaft of the worm speed reducer 7 by a telescopic universal joint (not shown).

The pair of wings 14a, 14b, 15a, 15b of the coupling holders 14, 15 have centering guides 14 projecting in the direction of the roll shafts 31, 32.
c, 14d, 15c, 15d are arranged. On the other hand, the height of the roll stand 3 on the vertical surface of the roll stand 3 on the side of the spline shaft is set to a predetermined value in advance, and the guide 14c,
A pair of guide stoppers 33, 34 with which 14d, 15c, 15d can abut are provided.

In the above structure, as shown in FIG.
The start position is when the intermediate stand 10 is on the worm reducer 7 side, and at this time, the lifting rods 17 and 17 are raised to set the upper limit of the coupling device including the coupling holders 14 and 15 and the couplings 21 and 22. Is pulled up to the position. When the sub-base 4 on which the roll stand 3 is placed is mounted on the common bed 2, the slide base 5 is moved forward to guide the guides 14c, 14 of the intermediate stand 10.
It is temporarily stopped at a position where d, 15c and 15d intersect with the guide stoppers 33 and 34 of the roll stand 3 (illustrated by an imaginary line). When the lifting force of the air cylinder 16 is released and the upper and lower coupling holders 14, 15 are lowered, the guides 14c, 14d, 15c, 15d come into contact with the guide stoppers 33, 34 of the roll stand 3 and stop. At this time, when the intermediate stand 10 is advanced to the final position, the couplings 21 and 22 and the spline shafts at the ends of the roll shafts 31 and 32 are guided by the guide pieces 21c and 22c, and the spline fitting is completed while rotating slightly.
At this time, since the couplings 21 and 22 are loosely coupled to the coupling holders 14 and 15 in the horizontal direction and the vertical direction, the roll shafts 31, 32 cores and the coupling 21,
The 22 cores can be fitted to each other even if they are slightly different from each other, and the lifting rods 17 and 17 do not hit the metal fittings 18 and 18 and have already been separated from each other, but there is no vertical constraint.
Since the coupling holders 14 and 15 are constrained by the slide rails 13 and 13 in the two axial directions via the linear guides, such fitting is not released during operation.

In order to release the couplings 21 and 22, the intermediate stand 10 is retracted to the above-mentioned start position to release the fitting of the spline shaft, and the lifting rods 17 and 17 are further raised to perform coupling. The restart preparation is completed by pulling up the device to the upper limit position.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The above-mentioned drive shaft connecting device shown in FIGS.
2, the coupling 21 and 22 core to the roll shaft 3
The upper and lower heights are set to the upper limit determined by the adjustment range of 1, 32, and the coupling device is lowered so that the heights of the upper and lower couplings 21 and 22 are determined by the contact of the centering guides. The lowering of 17, 17 lowers to the full stroke of the air cylinder 16,
Since the couplings 21 and 22 are stopped at that height, the spline shaft can be fitted therein, and the intermediate stand 1
The 0 is slid to the final position to complete the spline connection. Therefore, in this device, the roll shaft 31,
It is important that the 32 cores and the couplings 21 and 22 are automatically aligned by a mechanical operation. To make this possible, a play is provided at the lower limit of the hoisting rods 17, 17 so that the upper and lower roll shafts 31, Even when the upper limit of 32 is fully raised, it is necessary to find a condition under which the core height of the lower coupling 22 can be set so as not to exceed the upper limit.

Generally, the adjustment range of the upper shaft roll is often larger than the adjustment range of the lower shaft roll. Therefore, if the upper shaft coupling is pulled up to the required limit with a certain stroke, the height of the lower shaft coupling rises more than necessary and there is a risk of interference. Therefore, interference can be prevented if the condition for setting the play K is determined based on the given condition. Therefore, the coupling device is lifted with a constant stroke S, and during the lowering operation, the upper and lower roll shafts 31 and 32 and the upper and lower coupling 2
It is possible to match the 1 and 22 cores independently. This condition can be set by using the following conditional expression.

As shown in FIG. 4, the conditions of the roll shaft side are:
The height of the upper roll shaft from the reference plane is A ₁ and the maximum is A _2, and the height of the lower roll shaft 32 from the reference plane is B.
_1, a minimum B _2, the minimum shaft distance between C _min = A ₂ -B _1, the maximum inter-axis distance _{C max = A 1 -B 2 =} a + b + c, with _{a = A 1 -A 2 b =} B 1 -B 2 is there.

The conditions on the coupling side are that the height of the upper coupling from the reference plane is maximum X ₁ , minimum X _2, and
The height of the lower coupling from the reference plane is maximum Y ₁ , minimum Y ₂
Then, the minimum inter-coupling distance Z _min = X ₂ −Y ₁ , the maximum inter-coupling distance Z _max = X ₁ -Y ₂ = C _max + α.
+ Β '.

The stroke S of the air cylinder 16 is set to α = α 'and β = β', and when a> b, S = a + α + β a <b, S '= b + α' + β '. Further, the setting of the distance between the lifting metal fittings 18 and 18 of the lifting rods 17 and 17 is such that when a> b, the play K between the lower lifting metal fitting 18 and the lower coupling 22 is α =
α ′, and K = S−α−b. The hoisting rods 17, 17, the coupling 21,
Distance F between couplings 21 and 22 with 22 lowered
Is F = S + Z _min . The distance L between the guide stopper contact surfaces is δ ₁ between the upper coupling 21 and the upper guide stopper contact surfaces.
If the distance between the guide stopper contact surfaces of the lower coupling 22 is δ ₂ , then L = F + δ ₁ −δ ₂ .

[0021]

The drive shaft connecting device for a cold roll forming machine according to the present invention is provided with a coupling holder mounted on a linear guide capable of vertically sliding a coupling connected to a drive system by a telescopic universal joint. It is mounted so that it can be finely moved in any direction, and the intermediate stand that holds these is slid on the common base while lowering the coupling holder so that the coupling faces the end of the roll shaft. Since the coupling position of the intermediate stand is automatically guided regardless of the preset position, so-called one-touch coupling is possible and there is no loss time. The coupling position does not need to be adjusted in advance,
Since it is mechanically determined by the vertical movement of the air cylinder with a constant stroke, there is no problem such as misreading, and it is possible to adjust the rolling force during operation. In addition, since a simple guide stopper is simply attached to the roll stand side, the weight increase is negligible, and the position adjustment of the upper and lower roll shafts can be freely pre-set within a certain range.

[Brief description of drawings]

FIG. 1 is an explanatory view of a drive shaft connecting device according to the present invention as viewed in a molding line direction.

FIG. 2 is an explanatory view of the intermediate stand of the drive shaft connecting device according to the present invention as viewed from the roll axis direction.

FIG. 3 is an explanatory diagram showing a fitted state of a coupling and a roll shaft.

FIG. 4 is an explanatory view showing the relationship between the height of the upper and lower roll shaft cores and the height of the upper and lower coupling cores in the drive shaft connecting device according to the present invention.

[Explanation of symbols]

 1 Common Base 2 Common Bed 3 Roll Stand 4 Sub Base 5 Slide Base 6 Bed 7 Worm Reducer 8 Traverse Cylinder 10 Intermediate Stand 11 Support Panel 12 Vertical Surface 13 Slide Rails 14, 15 Coupling Holder 14a, 14b, 15a, 15b Wing 14c, 14d, 15c, 15d Guide 16 Air cylinder 17 Lifting rod 18 Metal fitting 21, 22 Coupling 21a, 22a Main body 21b, 22b Spline bearing 21c, 22c Guide piece 31, 32 Roll shaft 33, 34 Guide stopper

Claims (1)

[Claims] 1. A drive shaft coupling device for a cold roll forming machine, which connects a drive system provided on a common base side to a roll shaft of a roll stand on a sub base side, in addition to a telescopic universal joint connected to the drive system. A guide that has an intermediate stand that supports the coupling attached to the end and is horizontally movable in the roll axial direction on the common base, and has an axial spline groove formed on the inner peripheral surface and a spline groove formed at the coupling inlet. The buffer, which is detachably arranged, is buffered and supported on the coupling holder so that it can be moved horizontally and / or vertically, and the coupling holder is equipped with a linear guide that can be slid vertically so that the cylinder device can move up and down. Pull up the coupling holder vertically and move it horizontally to near the end of the roll shaft that serves as the spline shaft. The guide bar arranged on the coupling holder to make the coupling face the end of the roll shaft when it is lowered by bringing it close to the guide stand provided on the roll stand side. A drive shaft connecting device for a cold roll forming machine, which is capable of spline fitting.