JPH0763790B2 - Method and apparatus for manufacturing endless steel bands - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises two band winding drums spaced apart from one another, the shafts of the band winding drums extending parallel to one another and one of which is stationary. And a device for carrying out this method, using a device such that the other axis is laterally adjustable.

[0002]

Endless steel bands are preferably manufactured from a roll or a plurality of plates welded together. After unwinding the roll or welding multiple plates into a long band, the standard length of the desired endless band is displayed on the stretched steel band by means of a bar ruler and a right angle ruler, and a handheld shearing device. Or it is produced by a cutting machine. The steel band length can be up to 30 m and more. At this length, the vertical band edge is due to inadequate length measurement of the steel band, the lateral edges not being at right angles, and the warp of the band stretched in a particularly unstressed state. It has a length difference of approximately 5 mm that is induced.

The steel band thus elongated is welded by a welding device into one endless band.
For this reason, the band is guided loosely via two band winding drums and then both ends of the band are aligned and held together on the welding table, so that both lateral edges are spaced apart from each other depending on the type of welding. Have or contact. The band edge remains clamped on the table during the welding process.

After welding, the endless band is forced to run straight. One drum shaft is fixed and the other drum shaft is moved via a pre-connected hydraulic cylinder until the band achieves a preload of approximately 50 N / mm ² . In such a tensioned state, the band is rotated several times via the driven drum. The band attempts to move from the drum because of the aforementioned significant length error of the band length in the stretched state of the band, and in order to weld without preforming a uniform band preload. To avoid this, the adjustable drum is clamped on one side until the band is forced to run straight. In such a situation where the bands have non-uniform tension and the axes of the drums are not parallel to each other, the deviation of the straight run with respect to the band circulation is measured.

While the endless band manufactured in this manner is used, a band control device is provided for adjusting the moving band winding drum shaft to each other at short time intervals through the detection member at the longitudinal edge of the band. Therefore, the band does not move from the drum. The non-uniform constrained state characteristic of the band is superimposed by the additional control constrained. In particular, the uncompensated tensioning of both longitudinal edges reduces the permanent strength of the endless band.

[0006]

SUMMARY OF THE INVENTION It is an object of the invention that endless steel bands have a uniform tension and that the weld seams joining the band ends have high strength. A method and apparatus for manufacturing an endless steel band.

[0007]

The means of the method of the present invention, which has been devised to solve the above-mentioned problems, is designed so that the band end of the band cutting piece wound around the band winding drum is attached to the shaft of the band winding drum. The band is clamped in a laterally movable tensioning device against it, the band is clamped with a predetermined preload, and then the end of the band is clamped by a tensioning traverse while maintaining the preload and the band winding drum. Of the preload to the machining interval by loosening it by adjusting the movable axis of the claw, cutting with a shear knife and then welding the ends of the band.

Further, the means for constructing the present invention, which has been taken to solve the above-mentioned problems, is provided with at least one tensioning claw for each band end, and the tensioning claws at both ends of the band are provided. Are connected to each other by a tensioning device in order to generate a preload.

[0009]

EFFECT OF THE INVENTION Wrapped around a band winding drum,
By preloading the bands that are not yet joined at the ends, the bands maintain a uniform tension.

After cutting the end of the band, it is advantageous to mill the deformed cut cross section and then weld for the first time, so that no fine cracks occur at the end of the band and a high strength of the weld seam. Is achieved.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENT The device comprises a substrate 1 on which band winding drums 2, 3 are mounted, the axes 4, 5 of which are parallel to one another and at the same height. positioned. The shaft 4 is fixedly supported on the substrate, while the shaft 5 is movable parallel to said shaft 4. For this purpose, the bearing 6 is arranged movably along the guide track 7 and can be locked in a desired position.

The bearing 8 of the band winding drum 2 and the bearing 6 of the band winding drum 3 are supported on the inside by a pressure gauge 9 which shows the bearing force towards the center of the device.

The diameter of the band winding drum 2 and the diameter of the band winding drum 3 are the same.

In the exemplary embodiment, the band winding drums 2, 3 can be replaced by a plurality of discs of the same diameter, which are rotatably mounted on the shafts 4 and 5 independently of each other.

After the banding piece 10 has been wrapped around the band winding drums 2 and 3, the band ends 11, 12 are gripped by a plurality of tensioning pawls 13, each of which is positioned opposite one another. The two tensioning pawls are connected to each other by a tensioning device 14 to preload the band.

Each tensioning pawl 13 has a tensioning opening 15 for receiving the end of the band. The tensioning member present in the tensioning opening has the same diameter as the tensioning piston 16 which is slidably supported in the cylinder chamber 17 and is loaded into the cylinder chamber by the pressure medium. And a tensioning disc 18 which is rotatably mounted in a cylindrical receiving part 19 of the tensioning pawl.

Since the tensioning piston 16 and the tensioning disc 18 are rotatable about a common axis, they are even between the central planes of the two tensioning claws located opposite to each other and the edge of the band. Tightening at the band is avoided if the distance c is not maintained.

In the embodiment shown, the tensioning device 14 located between the two tensioning pawls 13 is designed as a pulling spindle, which has at its end 20 a left-hand thread or a right-hand thread. And the screw hole 21 of the tensioning claw
Is threadedly engaged with the end of the thread.

The axis 22 of the pulling spindle is located at the same height as the central plane of the band ends 11,12.

The tensioning pawl 13 is arranged on a carriage 23, which can run at right angles to the longitudinal axis of the device or parallel to the axes 4, 5 of the band winding drums 2, 3. Is.

The carriage 23 is guided along a lateral support 24. The carriage 23 has a surface guide 25 in the edge region, which engages in the groove 26 of the tensioning pawl 13.

As can be seen in FIG. 2, the groove 26 allows sufficient lateral movement of the tensioning pawls relative to the carriage.

Depending on the width b of the band, 2 at the end of the band.
There may be one or more pairs of tensioning pawls.

The lateral support 24 is parallel to the drum axis,
Alternatively, it can be adjusted to any angle with respect to the band winding drum.

The substrate 1 is further provided with a tensioning traverse 27 for fixing the band ends, which tensioning traverse extends over and over the width of the band, and a base 29. And a tensioning device for the end of the bending element.

The base 29 has a threaded hole at the end through which a longitudinally extending adjusting spindle of the device is fitted, which adjusting spindle constitutes the ball rolling spindle 30. You can also The ball rolling spindle 30 includes both shafts 4 of the band winding drums 2 and 3.
5 and extend perpendicular to these axes.

The constraining traverse is moved along the ball rolling spindle 30 independently of each other via a stepper motor 31. The ball rolling spindle is fixedly connected to the base plate 1.

At the base 29 of the tensioning traverse, tensioning cylinders 32 are provided in the range of the respective band ends, and a piston 33 is slidably supported in this tensioning cylinder. The piston rod is
It comprises a tensioning head 35 and is constituted by a tensioning bolt 34 which is guided through a hole in the bending member 28.

On one side of the device, the bearings 6 and 8 can also be removed from the drum pin 36. Further on this side, the tightening bolt 34 can also be pulled out of the tightening traverse 27, so that the band welded at the end of the band can be taken out of the device.

After the banding piece 10 is provided with the desired preload by the tensioning device 14, the band ends are secured by the tensioning traverse 27. Next, tightening claw 1
3 is moved away from the carriage 23 and is replaced with the cutting device 37.

The cutting device 37 shown in FIG. 3 comprises a shearing knife 38, a die 39 and a holding member 40, which is pressed against the band ends 11, 12 by means of a spring 41a. Before the end of the band runs into the cutting device 37, the preload applied to the band is such that the shaft 5 of the band winding drum 3 is the stationary shaft 4 of the band winding drum 2.
It is released by being moved in the direction of.

The tensioning traverse holding the band ends 11 and 12 can then be moved in the direction towards the carriage, so that the band ends can be driven into the cutting device.

By cutting the band end with a shear knife 38, a cutting cross section as shown in FIG. 4 is obtained.

The cutting cross-section 41 comprises an inlet 42, a cutting surface 43, a remaining fracture surface 44 and a corner 45.

Within the cut cross section, the rolled structure of the band has collapsed, which results in fine cracks in the soft iron matrix. This crack impairs the strength of the band seam.

The cutting cross section 41 is removed by a milling device 46, and the end of the band is machined up to the milling edge 47. For this purpose, the cutting device 37 is replaced by a milling device 46. In the milling device mounted on the carriage, the band end is moved closer by a clamping traverse until the milling tool can grip the milling edge 47 of the band end.

In order to weld the band ends 11 and 12,
The lateral edges of the band are joined by force traverses with a defined gap or by force, depending on the type of welding. After welding, the weld seam is further processed, for example by annealing, hot post-condensation or cold post-condensation, grinding or otherwise, by means of suitable auxiliary members or tools attached to the carriage.

[Brief description of drawings]

FIG. 1 is a plan view of a device having a banding piece wrapped with its ends clamped.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a vertical cross-sectional view of an apparatus including a cutting device for cutting the end portion of the band.

FIG. 4 is an enlarged view of a band end having a modified cutting cross section.

FIG. 5 is a partial vertical sectional view of an apparatus including a milling device instead of the cutting device.

[Explanation of symbols]

1 substrate, 2,3 band winding drum, 4,5
Shaft, 6 bearings, 7 guideways, 8 bearings, 9
Pressure gauge, 10 band cutting pieces, 11 and 12 band ends, 13 tightening claws, 14 tightening device, 15 tightening opening, 16 tightening piston, 17 cylinder chamber,
18 tightening disc, 19 receiving part, 20 end part, 2
1 screw hole, 22 axis, 23 carriage, 24
Lateral support, 25 surface guide, 26 groove, 27 tension traverse, 28 bending member, 29 base, 30
Ball rolling spindle, 32 step motor, 32
Tightening cylinder, 33 piston, 34 tension bolt, 35 tension head, 36 drum pin, 37
Cutting device, 38 shear knife, 39 dice,
40 pressing member, 41 cutting cross section, 41a spring, 42 inlet, 43 cutting section, 44 remaining fracture surface, 45 corner portion, 46 milling machine, 47
Milling edge

Claims (15)

[Claims] 1. A method comprising two band winding drums arranged at a distance from one another, the shafts of the band winding drums extending parallel to one another, one axis being stationary and the other axis. In a method for producing an endless steel band using a device such as laterally adjustable, the band end of a banding piece wrapped around said band winding drum (2, 3). The tightening device (1) capable of moving the (11, 12) laterally with respect to the shaft (4,5) of the band winding drum (2, 3).
3, 14) and tightening the band with a given preload, then fixing the band ends (11, 12) with a tightening traverse (27) while maintaining the preload and wrapping the band. Method for producing an endless steel band, characterized in that the movable preload is brought into the working interval by adjusting the movable axis of the drum, cut by a shearing knife (38) and then the ends of the band are welded . 2. Both band ends (1) which are roughly cut.
Method according to claim 1, characterized in that 1,12) are milled in parallel before welding. 3. A base plate on which two band winding drums of the same diameter are mounted spaced apart from one another, the two shafts of the band winding drums extending parallel to each other. And, one of the axes is stationary,
And at least one tension for each band end (11, 12) in a device for carrying out the method according to claim 1 or 2, wherein the other axis is of laterally adjustable construction. An endless steel band, characterized in that it is provided with fixed pawls (13) and the clamping pawls (13) at both ends of the band are connected to each other by a clamping device (14) in order to produce a preload. Equipment for manufacturing. 4. The substrate (1) comprises a guide track (7) forming a right angle with the axis (4) of the band winding drum (2), in which guide bearing (3) of the band winding drum (3) is provided. 4. The device according to claim 3, wherein 6) is arranged movably and lockably. 5. Each tightening claw (13) has a band end (1).
1, 12) for receiving a tightening opening (15), a tightening piston (16) on one side of the band end and a tightening disc (18) on the opposite side. The apparatus of claim 3 having. 6. The tightening disc (18) is provided with a tightening piston (1).
6) has the same diameter as that of 6), and also has a tightening claw (1
Device according to claim 5, which is rotatably mounted in 3). 7. A tensioning pawl (13) is provided transverse to the longitudinal axis of the device or on a band winding drum (2, 3).
7. The device according to claim 3, wherein the device is arranged on a carriage (23) which can run parallel to the axes (4, 5). 8. A tensioning device (14) for preloading the band is constructed as a tensioning spindle, which tensioning spindle is provided at its end (20) with a left-hand thread or a right-hand thread and is tensioned. 4. The device according to claim 3, wherein the device is screwed to the thread end portion of the screw hole of the claw. 9. The use of a plurality of tensioning pawls, wherein the axes of the plurality of tensioning spindles have the same height position and are located in the center plane of the band ends. Equipment. 10. Device according to claim 7, characterized in that the carriage (23) comprises a surface guide (25) which engages in the groove of the tensioning pawl (13). 11. Device according to claim 10, wherein the carriage has the tensioning pawls (13), the cutting device (37), the milling device (46) and the welding device arranged in a mutually interchangeable manner. 12. A tensioning traverse (27) is provided on the substrate (1) for fixing the band ends (11, 12), the tensioning traverse extending over the band width and beyond. It comprises an extending bending member (28), a tensioning device for the bending member end, and a base (29), the base having a threaded hole at the end through which the threaded hole passes. 4. The device according to claim 3, wherein an adjusting spindle extending in the longitudinal direction of the device is inserted. 13. The base (29) is provided with tensioning cylinders (32) in the region of the respective bending member ends.
A piston (33) is slidably mounted in the tensioning cylinder, the piston rod of which has a tensioning head (35) and is guided through a hole in the bending member (28). 13. Device according to claim 12, constituted by means of a tightening pin (34). 14. Instead of a band winding drum , 1
Identical , rotatably mounted independently of one another on one axis
4. A device according to claim 3 , wherein a row of discs of diameter is provided. 15. Band winding drum (2, 3) or
Supports a row of disks of the same diameter so that they can rotate independently of each other
15. The device as claimed in claim 3, wherein the bearings (6, 8) of the running shaft are supported on the inside by a pressure gauge (9).