JPS61230809A - Cutter knife replacing method for turret side trimming machine - Google Patents

Abstract

PURPOSE:To shorten the cutter knife replacing time thus to save the manpower by turning a side trimming machine to remove the scrap then stopping the line to rotate the turret thereafter setting a spare cutter knife to the cutting position. CONSTITUTION:The line speed VY is properly decelerated to control the horizon tal moving speed VX and the direction of the cutter knives 1, 1' accordingly. Consequently, the scrap 10a under trimming is cut from the strip 10 along a random setting curve 13a. The line is stopped near the point (a2) where the cutter knives 1, 1' will roughly finish the cutting of scrap 10a to set the spare cutter knives 101, 101' at the cutting position. Since side clipping work is not required, the replacing time is shortened to save the manpower.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for replacing a cutter knife of a side trimming device in a line that continuously processes steel strips and the like (hereinafter referred to as strips).

Conventional technology Generally, strip f'% such as a pickling line: When using a side trimming device for different width materials in which strips of different width dimensions are continuously joined in surface treatment equipment, the line must be stopped. A means for trimming in response to changes in the width of the board, ie, a method for trimming while running, has been developed, and an example thereof will be explained with reference to FIG. This figure is a plan view showing the trimmer on one side of the trimmer during running using the side trimming device shown in Japanese Patent Application No. 119308/1988, which was previously proposed by the present applicant.

The gist of this device is a pair of upper and lower rotating disc type cutter knives 1.1' and another pair of preliminary cutters 101.
．． In the rotary (turret type) side trimmer 3 equipped with 101"t', the symmetry center O7 of these two pairs of cutter knives serves as the pivot axis of the knife and the knife axis 2.
τ, 102.102' Y The knife is rotated horizontally around the center of rotation O, and while moving horizontally in the width direction vx, continuous cutting is carried out by cutting during the travel. The present invention aims to improve the operating rate of the device and the yield of strips by making it possible to use a machine that entrains the material during running.

In the following, the method of cutting is explained. The joining part 12 of the strips 10, 11 of the preceding and succeeding coils is cut with a cutter knife 1.
1', along a smooth arbitrary curve 15 that touches each of an arbitrary position α1 on the cutting line 13 of the preceding strip 10 and an arbitrary position αY on the cutting line 14 of the succeeding strip 11, and Always upper and lower cutter knife axis 2α, 2
α1 such that α′ is approximately perpendicular to the tangent to curve 15 at each cutting point. a2...Continuous cutting is carried out while rotating the cutter knife 1.1' and knife shaft 2.2' around the center of rotation and horizontally moving it in the width direction of the board as if moving in a circular motion. Ru. In this case, the horizontal rotation speed W and horizontal movement speed vt and line speed vY of the cutter knife 1.1' are appropriately controlled. In other words, the cutter knife 1.1' of the side trimmer and the knife axis 2.2'' are used to change the width of the run and to change the cutter knife using the rotary drive device 5 and the horizontal movement device 8, which can be horizontally rotated around the t-axis 0. 1゜1
'Axes 2α and 2α' are traveling cutting curve 1 at the cutting point.
Rotation angle and horizontal movement speed so that it is almost perpendicular to the tangent line of 5? Control allows smooth trimming.

Problems to be Solved by the Invention During trimming with such a trimmer, if the cutter knife is worn out and the cutter knife has to be replaced, the strip is usually clipped to the next position (see Figure 4) or
As shown in the figure, after the line 1 is stopped at the intermediate change position where the strip changes from the wide material 10 to the narrow material 11, the trimmer body 3 Y is horizontally rotated 180 degrees and a spare knife 101.
Replace with 101'. Therefore, a side clipping operation is required to prepare for changing the blade, and the length of time required for this operation to stop the line becomes a problem.

In addition, when changing the blade at the middle changing position as shown in Figure 5, there is no problem if the position is upstream near the side trimmer, but if it is far away, it will take longer to start changing the blade. During this time, there are problems such as deterioration of trimming performance, which becomes a factor that inhibits production efficiency.

tth means for solving the problem When replacing the cutter knife of the side trimming device, the line speed vYt is appropriately reduced by parallel production, and the line speed v
Horizontal turning speed W of cutter knife 1.1' with respect to Y, its direction, and horizontal movement speed vx of cutter knife 1.1'
By appropriately controlling the scrap IQ eL'+1 during trimming and its direction, a cut 9 is taken from the strip 10 along an arbitrary set curve 13α, and the cutter knife 1.1' almost completes cutting of the scrap 10α. Line l is stopped near the point (L2).

When replacing the working cutter knife, the side drill man is rotated to cut out the scrap, the line 1 is stopped, the turret is rotated once, and the cutter knife is set at the preliminary cutting position.

Embodiment In FIGS. 1 and 2, members that are the same as or similar to those of the conventional apparatus shown in FIGS. 3 to 5 are given the same reference numerals as those of the conventional apparatus, and detailed explanations thereof will be omitted. The trimmer shown in FIG. 1 has the same structure as the turret-type side trimmer shown in Japanese Patent Application No. 119308/1988, which was previously proposed by the present applicant. Then, at any cutting position α1, for example, due to reasons such as replacing the cutter knife 1.1', the cutter knife 1.1' is removed. If the cutter knives 1 and 1' are to be separated from the strip 10, the line speed vYY is decelerated at an appropriate speed, and the horizontal turning direction and speed W of the cutter knives 1, 1' and the horizontal movement direction and speed vX are adjusted accordingly. For example, the first
By continuing cutting along an arbitrary set curve 13α such as the shaded area in the figure, the scrap 10 (L'jt
The strip 10 can be easily removed by cutting it from the end. In this case, line speed vY, cutter knife 1.1'
The line is controlled so that the line stops near the point where the cut Z of the scrap 1 (M) is almost completed [point cL2 in FIG. 1].

Therefore, by horizontally rotating the knife replacement trimmer body 3t1 by 180 degrees with respect to the original cutting position α1, both knife pairs 1.1' and 101.101'
It is easy to carry out and can be set accurately on the set cutting line without interfering with the cutting line, and trimming can be resumed by starting the trimmer and line according to known procedures.

FIG. 2 is a slightly exaggerated illustration of how the cutter knife is replaced when cutting the scrap along the cutting curve 13α in FIG. The t that goes into the side is the starting point of the cut! 1', the blade surfaces of the knives 101 and 101' cross the edge of the strip 10 by an angle α, making it possible to start cutting smoothly.

Note that the cutting start angle α of the cutter knife 101, 101' is close to 90 degrees (it is true that the cutting starts more smoothly, but the line speed vY, the knife horizontal movement speed vx and its direction, and the horizontal turning speed W By appropriately controlling the angle and its direction, it is possible to obtain a cutting curve with an appropriate α angle.

Effects of the Invention As is clear from the above explanation, by using the present invention, the knife of the turret type side trimmer does not require side clipping each time, and can be changed at any stripping position during line operation. This can be done extremely easily and quickly just by stopping the line, so compared to conventional turret-type side trimmers, the line downtime due to blade changing work is significantly shortened, and further labor savings can be achieved. can.

[Brief explanation of drawings]

Fig. 1 is a schematic plan view showing an embodiment of the cutter knife replacement method for a turret-type side trimmer of the present invention, Fig. 2 is a schematic plan view showing the state of the cutter knife replacement after scrap removal, and Figs. 1 to 3 are turret-type side trimmers. A plan view showing side trimming using a type side trimmer, and FIGS. 4 and 5 are schematic plan views showing a conventional cutter knife replacement method. 3... Trimmer body 1, 1', 101.101'... Cutter knife O
...Turning center 1o...Strip lOα
... Scrap 13... Cutting line 13α...
Cutting curve α1...Arbitrary cutting position α2...
Cutting end position Sub-agent Patent attorney Shige Okamoto 2 persons Figure 1 a2 - Cutting end position Figure 2

Claims (1)

[Claims] Rotary type (turret type) equipped with a pair of upper and lower rotating disc type cutter knives and another pair of spare cutter knives
In the side trimmer, the cutter knife is horizontally rotated around the center of symmetry between the two pairs of cutter knives, and is moved horizontally in the width direction of the strip to cut the scrap being trimmed from the strip along an arbitrary set curve. A method for replacing a cutter knife for a turret type side trimmer, characterized in that the line speed is reduced to zero near a point where the knife almost completes cutting off the scrap.