JPS5845037Y2 - Cutting device that vertically cuts strip material - Google Patents

Description

[Detailed description of the invention] The present invention is a cutting device that vertically cuts a strip-shaped material between circular knives that are provided elastically with respect to each other, and that are mounted on and removed from the cutting machine. a side wall connected by a cross bar and an adjusting member for the knife shaft; on said side wall the knife shaft is provided with a bearing bushing movable for adjusting the knife in the axial direction and in the spacing direction of the knife shaft; It relates to a cutting device of the type which is rotatably held by.

The original cutting tool was formed by a circular knife,
Cutting devices of the type in which these circular knives are arranged on a lower knife axis and on an upper knife axis in such a way that they mesh with each other are known.

In practice, three main types of construction are used, which differ from each other not only in the construction of the knife but also mainly in the bearing arrangement of the knife shaft and its adjustment arrangement.

One device with a rotary spring knife cutting system has a number of rings arranged as knives on the lower knife axis, the rings having one of their outer edges at a 2° angle with respect to the radial plane of the axis. Beveled at an angle has been removed.

This angle is called the clearance angle.

The same number of disks, which have a blade-like profile on their outer periphery and are each mounted on a sleeve, are arranged by means of the sleeve on the upper knife axis.

In the operationally adjusted state of the cutting device, the disc of the upper knife shaft only slightly enters the gap between the rings serving as knives of the lower knife shaft and the tilting of the rings is removed by means of an axially acting spring element. pressed against the surface.

The upper knife shaft is adjustable in three directions to mutually adjust these knife parts, i.e. axially to compress the knife, and a worm drive mechanism acting in both directions to adjust the engagement dimensions of the knife. The spacing relative to the lower knife axis can be adjusted to adjust, and eccentric adjustment is provided at both shaft ends to ensure reliable contact between the blade surfaces of the upper knife and the lower knife. By means of possible spherical bearings, the inclination of the upper knife shaft can be adjusted to adjust the intersection of the knife shafts with each other.

The adjustment of the knife axis is carried out within the cutting machine, as is the mutual running-in of the cutting edges, so that the cutting machine is not available for the production process during this maintenance period.

This often results in cut-off machine down times of several hours.

As a further disadvantage, the upper knife shaft is equipped with eccentrically adjustable spherical bearings at both shaft ends for its adjustment.

With such bearings, it is extremely difficult to adjust the intersection so that its point of intersection is located in the center of both knife axes.

Moreover, with this cutting device it is hardly possible to fix the upper knife shaft precisely and with sufficient repeatability, since the axial adjustment and the adjustment of the knife engagement dimension are only possible once.
This is because the adjustment is performed by two adjustment drives.

Due to this disadvantageous configuration of the adjustment mechanism and also due to the limited accessibility of the relevant parts to the operator, it is extremely difficult to achieve the necessary precision when adjusting the knife.

Another cutting device which has been used according to the above method and which performs so-called rotary shearing mainly consists of two lateral parts which are separable from the cutting machine, these lateral parts being connected to the cross bar. They are kept in a precise position with respect to each other, with recesses being provided in these side parts for the bearing arrangements of the lower knife shaft and the upper knife shaft.

The lower knife shaft is supported in the notch by a bushing and is fastened by a prism piece.

The upper knife shaft is provided at both ends with bearings which are movable in the direction of the distance between the two knife shafts, by means of which the upper knife shaft can be moved in the radial direction of the shaft by means of an adjusting screw.

Therefore, in order to adjust the engagement dimension of the knife, only the axial spacing of the knife shafts can be adjusted.

Furthermore, no spring elements are provided for the knife, thus placing high demands on the accuracy of the knife and intermediate ring and their positioning on the knife axis.

One system of similar construction using a cutting method using small disks uses thin disks with similarly right-angled cutting edges as knives on the lower and upper knife shafts.

The knife then acts as a spring element.

In order to adjust the pressure force with which the lower knife and the upper knife are pressed together, the knife axes in this cutting device are also mutually adjustable in the axial direction.

However, even with this cutting device it is not possible to intersect the two knife axes with each other, so that a uniformly good cutting action is not guaranteed over the entire arrangement of the knives on the knife axes.

Therefore, an object of the present invention is to allow the lower knife shaft and the upper knife shaft to be accurately mutually adjusted in the axial direction and the direction of the shaft spacing outside the cutting machine, and to easily allow the knife shafts to intersect with each other. The aim is to configure the cutting device in such a way that the knife axes intersect precisely at the centers of their lengths.

One partial purpose of this is to construct an adjustment device for precisely axially adjusting one of the knife axes, by means of which further obtaining a take for comparison with the cutting results. I can do it.

The invention solves this object in the following way: the bearing bush of the axially movable knife shaft is supported in a recess in the side wall, and this recess is removably connected to the bridge piece. a push screw which can be locked by a button is threaded into each bridge piece, which carries a prismatic piece for fixing the bearing bushing, and which is also movable in the above-mentioned spacing direction. The bearing bushing of the knife shaft rests in a cutout in the side wall on an exchangeable support member that determines the height position of the bearing bushing. Its position can be fixed by means of a pressure piece acting on the upper surface, in which case the support element for the bearing bush has a path of movement in the direction of the two knife shafts, so that the knife shaft can be moved by the support element in the above-mentioned direction. It is adjustable in the spacing direction and can take an inclined position where the knife axes intersect and form one another.

According to a preferred embodiment of the present invention, the bearing bushes of both the knife shafts adjustable in the spacing direction and the inclination direction and the bearing surfaces AR of the support member are configured in a cylindrical shape, and the central axis of the cylinder is perpendicular to the axis of the knife shaft.

According to another advantageous embodiment of the invention, a bolt is provided in the closing member in order to move and adjust the knife shaft in the direction of spacing by buttoning it in the recess in the side wall, this bolt being connected to the bearing bushing. are combined.

The configuration of the cutting device according to the invention advantageously allows for precise and suitable configuration of both knife axes, as well as the interlocking dimensions of the knives of the upper and lower knife axes and the inclination of one of the knife axes, which produces an intersection of both knife axes. With this bearing it is possible to: achieve very precise and repeatable adjustment;

Furthermore, it is possible to precisely adjust the axial movement of one of the knife shafts and to accurately measure the adjustment force and travel distance, so that the accuracy of the knife shaft and the knife can be determined from the adjustment take. It is advantageous to be able to inversely estimate the state of .

Furthermore, the bearing arrangement of the knife shaft according to the invention prevents the knife shaft tensioners 11 from being pushed apart from each other and thereby becoming damaged in the event of an impact load due to adhesive points of the strip material.

Another advantage is that the speed of the upper and lower knives can be continuously adjusted and kept constant through the use of a fine adjustment transmission.

Furthermore, it is important from the economical point of view of the cutting device that the time required to stop operation of the cutting machine when replacing a knife is reduced to less than 1/10 of the conventional stop time.

Next, the cutting device according to the present invention will be explained in detail with reference to the embodiments shown in the accompanying drawings.

FIG. 1 shows the overall structure of a cutting device 1 according to the present invention. (as shown).

A lower knife shaft 2 and an upper knife shaft 3 are located in the two side walls γ which are kept in precise position relative to each other by a close spar 6.
is supported.

On the fixed bearing side, the lower knife shaft 2 is held without play in the axial and radial direction in a rolling bearing 8a, which is arranged axially movably in the bearing bush by a bushing for adjusting the lower knife shaft. Even if the cutting device is in operation, the bushing 8 with the rolling bearing 8a and the bearing bushing 9 are
For example, they are connected to each other by means of a threaded connection, which can be screwed onto the bushing 8, which is provided with external threads at both ends, and which tightens the bearing bushing 9.

On the loose bearing side, the lower knife shaft 2 is, for example, guided with no play in the radial direction and movably in the axial direction by the needle bearing 8b, which is also accommodated in the bushing 11.

The bearing bushes 9 and 11 are located in recesses in the side wall 7 which are open towards the front face of the cutting device (FIG. 2).

On the open side of the recess, in each case one bridge piece 12 is firmly and precisely connected to the side wall 7 by means of screws and pins.

A push screw 13 is guided in each case by threads in the fringe pieces 12, to which a prismatic piece 14 is attached, and by turning the push screw 13, this prismatic piece 14 is moved into its recess. is pressed against the bearing bush 9 or bush 11 to fix it.

The lock nut 16 causes the push screw 13 and the square column piece 1 to
4 can be prevented.

To support the upper knife shaft 3, a rolling bearing is also provided on the fixed bearing side and, for example, a needle bearing on the loose bearing side.

Both bearings are each held in a bush 18 (FIG. 3), which bush 18 is arranged in a recess in the side wall 7 by means of a support member 19 and a pressure piece 26.

In the device according to the present invention, the bushing 18 is a rectangular parallelepiped,
This rectangular parallelepiped is formed by a cylinder cut flat on both sides and has a borehole in the cut-out side surface 20 for accommodating the bearing of the upper knife shaft 3.

The cylindrical surface 21 of the bushing 18 is needed as a guiding and bearing surface, and on its lower surface the bushing 18 rests movably on a support member 19 for precisely positioning and fixing the bearing.

For this purpose, the support element 19 has an internal recess with a cylindrical surface adapted to the surface of the bushing 18 and, in this case, the bushing 18
and upper knife shaft 3 are exchangeably arranged in the recess in the side wall such that the central cylindrical axes of both are perpendicular to each other.

As a result, the upper knife shaft 3 is moved in the direction facing the lower knife shaft 2, and the fixed bearing side and the loose i1m] fl
It is possible to tilt the support member 19 with a different thickness from 11, so that both knife shafts 2, 3
The horizontal central axis planes of the knife axes 2, 3 form an angle of intersection with each other.

This makes it easy to support both knife shafts 2 by creating a support member with a positive deviation and a negative deviation.
The intersection point of 3 can be located at the center of the axis.

In order to adjust the distance between the two knife shafts 2, 3 and the engagement dimension of the knife 4.5, a bolt 22 with a fine thread is attached to the end face of each bushing 18, and this bolt is tightened by a nut 23 to adjust the thread pitch. can be moved in accordance with the corresponding graduations.

The nut 23 is held in a recess 24 in the side wall part 25, which is mounted on the side wall γ, in particular by screws (FIG. 2).

To secure the two bushes 18, a pressure piece 26 is provided which is arranged above these bushes and adapted to the upper cylindrical surface of the bush 18, which pressure piece 26 is loosely attached to the screw 27. It is being

Push screw 27 guided by a thread in the side wall 7
While turning the button, press the pressing piece 26 on both bushes 1.
8 can be pressed against the upper cylindrical surface of the bush 18, and at this time, the lock nut 28 loosens the fixation of the bush 18.
You can avoid it.

In order to laterally guide the pressure piece 26 as well as the two support elements 19, the recess in the side wall 7 is provided with a guide strip 29.

In order to bring the lower knife 4 and the upper knife 5 into contact with each other, constructed according to the known cutting machine working with the rotary spring knife cutting method mentioned at the outset, the lower knife shaft 2 is fitted with a bearing bush 9 and a bearing bush 9 as already explained. It is held movably in the axial direction by a bushing 11 within a notch in the side wall 7.

The necessary movement is achieved by means of a regulating device 30 (
(FIG. 4), in particular by means of a pneumatic adjusting cylinder.

Three parts 31 of the adjusting cylinder 30 that are threadedly connected to each other
．． The casing consisting of 32.33 is the lower part of the casing 31
has a turned recess 34 in its end face, by means of which the adjusting cylinder is centered on the flange of the bushing 11 of the lower knife shaft 2 when screwed onto the outer surface of the loose bearing side (jlFJ 7). Ru.

This centering is also possible with at least two adjusting screws.

There is a rolling diaphragm 35 between the casing lower part 31 and the casing middle part 32 and another smaller rolling diaphragm 3 between the casing middle part 32 and the casing upper part 33.
6 is tightened 1.

A shaft 40 is movably arranged in the center of the casing 31, 32, 33, the tip 41 of which is connected to the lower knife shaft 2.
into the central hole of the lower knife shaft 2 through a hole in the end wall of the lower casing 31 for axial movement.

This shaft 40 is provided with a shaft collar 43 near its pointed end 41 which mates with a nut 39 screwed onto the other end of the barb 140 and a lid 38 having the same contour as the interior of the casing. Tighten the intermediate piece 37 having a T-shaped cross section.

In this case, a large transfer diaphragm 35 is screwed in between the lid 38 and the intermediate piece 37 on the other side, and a small transfer diaphragm 36 is screwed in between the nut 39 and the intermediate piece 37 on the other side.

As a result, the drive shaft 40 is mainly driven by the rolling diaphragm 35.
, 36 in the casing 31, 32, 33.

A coil spring 42 is arranged on the shaft 40, which rests against the end wall of the housing lower part 31, which presses on the shaft collar 43 and has a return force of 500 p to 2000 p, in particular 600 p to 850 p.

The shaft end 4 projects through the hole in the casing upper part 33
A stylus 45 of a dial gauge 46 is placed on the end surface of 4.

This dial gauge is carried by a holder 47 attached to the end face of the casing upper part 33.

, the chamber formed primarily by the two shifting diaphragms 35, 36 in the housing 3L32.33 for axially displacing the lower knife shaft 2 is supplied with pressurized air, for example, with a pressure gauge equipped with a pressure gauge. Adjustment is possible with a commercially available adjustable pressure reducing valve 48.

In this case, the axial movement of the lower knife shaft 2 can be read using the dial gauge 46.

When there is no pressure in the adjusting cylinder 30, the shaft 40 is moved away from the lower knife shaft 2 by the coil spring 42 into the rest position.

The effective adjustment force Fs of the adjustment cylinder 30 (kilo-pounds (Ki)
ropond) Kp] is calculated according to the following formula %, where the symbols are as follows and the values stated in the bracket relate to one embodiment of the cutting device according to the invention; A1-Dog Cylinder area of diaphragm cJ (3
8,5) A2 - Cylinder area of the small transfer diaphragm c4 (7
,1) Pressure K p /cA (3,2
) FF - the return force of the coil spring, ) (0,7) The kneading friction of the transfer diaphragm must be negligibly small.

When adjusting the knife axes 2, 3, pressure and distance indications (-) provide data that can be compared with the cutting results and can therefore be used, for example, for statistical evaluation, to optimize the adjustment of the knife axes. I can do it.

Furthermore, from the pressure-dependent displacement distance of the lower knife shaft 2 it is possible to deduce the accuracy of the spacing between the lower knife 4 and the upper knife 5 or the condition of the knives, because of the constant displacement distance. This is because the force required for this depends on the number of lower and upper knives that are in contact at the same time.

Whereas the drive of the lower knife shaft 2 is conventionally carried out by an electric motor, the upper knife shaft 3 is driven in the device according to the invention by a commercially available fine-tuning transmission with a transmission ratio of 1:1.4, for example. It is driven from the lower knife shaft 2 via the lower knife shaft 2.

This precision adjustment transmission makes it possible to keep the knife speed precisely constant, which is particularly important if the diameter of the upper knife 5 changes due to resharpening.

This suitable embodiment of the knife shaft drive has an advantageous influence on the cutting quality and the service life of the lower and upper knives.

[Brief explanation of the drawing]

The attached drawings show one embodiment of the present invention, in which Fig. 1 is an overall perspective view of the cutting device, Fig. 2 is a side view of the cutting device, and Fig.
This figure is an overall view of the bearing of the upper knife shaft, and FIG. 4 is a sectional view of the adjustment device for moving the lower knife shaft in the axial direction. The correspondence relationship between the main parts shown and the symbols is as follows. DESCRIPTION OF SYMBOLS 1... Cutting device, 2... Lower knife shaft, 3... Upper knife shaft, 4... Lower knife, 5... Upper knife, 6... Close bar, 7... Side wall, 8... Bush, 8a... Rolling bearing, 8b... Needle bearing, 9... Bearing bushing, 11... Bush, 12...
...Bridge piece, 13...Press screw, 14...Prismatic piece, 18...Futsuyu 19...Supporting member, 21...
・Cylindrical surface, 22... Threaded bolt, 26... Pressing piece,
27...Press I-29...Guide strip, 30...
Adjustment device (adjustment cylinder), 40...axes, 46 measuring instruments (dial gauge).

Claims (3)

[Scope of utility model registration request] (1) A cutting device that longitudinally cuts a strip of material between circular knives that are provided elastically with respect to each other and that are offset from each other, the device being removable from the cutting machine and connected by a cross bar. and an adjustment member for the knife shaft, the knife shaft being rotatably held in the side wall by a movable bearing bushing for adjustment in the direction of the knife axis and in the direction of the spacing of the knife shaft. In a cutting device of the type shown in FIG.
A lockable push screw 13 is screw-guided in each bridge piece until the button is closed, carrying a prismatic piece 14 for fixing the bearing bushing, which is movable in the direction of the above-mentioned spacing. Bearing bushing 1 of knife shaft 3
8 rests on an exchangeable support member 19 which determines the height position of such a bearing bushing in a cutout in the side wall 7;
On this support member, the bearing bushing 18 can be fixed in position by means of a pressure piece 26 actuated by a fixable push screw 27 and acting on the upper surface of the bearing bushing, in which case the support member for the bearing bushing 18 has a path of movement between the two knife shafts 2, 30 in the direction of displacement, so that the knife shaft 3 can be adjusted in the above-mentioned spacing direction by means of the support member 19, and the knife shafts intersect to form an inclined position with respect to each other. A cutting device for longitudinally cutting a strip-shaped material. (2) Utility model registration In the cutting device according to claim 1, the bearing bushes 18 and the support member 19 of both the knife shafts 3, which are adjustable in the spacing direction and inclination force, have a cylindrical surface. 1. A cutting device constructed in such a way that its cylindrical central axis is perpendicular to the axis of the knife shafts 2, 3. (3) Utility Model Registration In the cutting device according to claim 1 or 2, the knife shaft 3 is located within the notch of the side wall 7 and is moved in the spacing direction for adjustment.
A cutting device in which a bolt 22 is threadedly guided in 5 and is connected to a bearing bush 18.