JPH0985519A - Apparatus and method for correcting run-out of knife end face of trimming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correct the run-out amount of a knife end face in a short time by providing a plurality of hydraulic diaphragm devices interposed in a position opposed to a jack bolt between the rear surface side of a knife and a knife spindle to correct the position of the knife. SOLUTION: When the end face run-out of a knife 1 is corrected, a jack bolt 6 is slightly loosened to hold the end face of the knife 1 only with a spring 7. When under such condition the knife 1 is wanted to be moved to the front surface side, an adjusting bolt 10 is tightened to expand a diaphragm 11 and move slightly the knife 1 in the direction of the arrow B. Conversely when the knife i is moved to the rear surface side, the adjusting bolt 10 is loosened to contract the diaphragm 11 and move slightly the knife 1 in the direction of the arrow C. After the completion of correcting the position, the jack bolt 6 is completely tightened for location until the tip abuts against the knife 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a knife end surface runout correcting device of a trimming device for trimming a cold rolled steel sheet and a correction method thereof.

[0002]

2. Description of the Related Art As shown in FIG. 4, a conventional trimming device for trimming a cold-rolled steel sheet is such that upper and lower knives 1 and 1 are attached to knife spindles 2 and 2, respectively, and lock nuts 3 and 3, respectively.
In general, the knife spindles 2 and 2 are fixed to the bearing box 4 via bearings (not shown). At this time, it is important to make the clearances ΔC of the upper and lower knives 1, 1 uniform in the circumferential direction, and normally 10 to 15% of the trimmed plate thickness is optimal. However, it is extremely difficult to adjust the clearance ΔC of a thin material of 0.2 mm or less uniformly over the entire circumference.

A conventional knife end face runout adjusting method will be described with reference to FIG. Generally, when the knife 1 is simply fixed to the knife spindle 2 by using the lock nut 3, the state of the knife 1 is indicated by a dashed line A due to the end face runout accuracy of the knife spindle 2 and the manufacturing accuracy of the knife 1. End face runout occurs. This shake amount ΔS is 0.02 to 0.
Since it will be about 03 mm, when cutting thin materials, insert the ultra-thin paper 5 between the knife spindle 2 and the knife 1
The end face runout accuracy of is corrected to 0.01 mm or less.

The absolute amount of the clearance ΔC is adjusted by moving either the upper or lower knife spindle 2 in the axial direction.

[0005]

However, in the above method, when inserting the ultra-thin paper 5 between the end faces of the knife 1 and the knife spindle 2, the lock nut 3 at the tip is loosened and retightened each time. Work occurs,
There is a problem that workability is very poor. Also, since only stepwise adjustment is possible, it is extremely difficult to properly adjust the clearance ΔC over the entire circumference of the knife meshing part, and when a sudden knife replacement work occurs, a long downtime (operation There was a problem such as being forced to stop and stop the line.

Incidentally, for example, Japanese Patent Laid-Open No. 1-109016 discloses a technique of pressing a knife against a holder reference surface by a plurality of pressing means arranged on the same circumference.
This is insufficient because the holder reference surface is worn and deformed. SUMMARY OF THE INVENTION It is an object of the present invention to provide a knife end face runout correction device for a trimming device and a correction method thereof, which solves the above-described problems of the conventional art.

[0007]

SUMMARY OF THE INVENTION According to the present invention, upper and lower knives are fixed to a knife spindle by using lock nuts, and the knife spindle is fixed to a bearing box via a bearing. In the correction device, a plurality of jack bolts screwed in the circumferential direction of the lock nut, with a spring interposed at the tip thereof to be abuttable on the front side of the knife, and the back side of the knife. A plurality of hydraulic type film expanding devices which are interposed between the knife spindle and the jack spindle so as to be opposed to the jack bolts and can correct the positions of the knives; It is a correction device.

Further, according to the present invention, a step of measuring an end face runout amount of the knife to obtain a necessary correction amount, a step of loosening the jack bolt and pressing the end face of the knife only by the spring, and the necessary correction amount. And a step of expanding and contracting the hydraulic type film expanding device based on the amount to correct the position of the end surface of the knife.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a front view showing an embodiment of a trimming device of the present invention, and FIG. 2 is a partially enlarged cross-sectional view showing the arrow II. In the drawings, the same members as those in the conventional example are designated by the same reference numerals and the description thereof will be omitted.

In FIG. 1, reference numeral 6 designates a plurality of jack bolts (four in this drawing) which are attached in the circumferential direction of the lock nut 3 and can come into contact with the front surface of the knife 1. Reference numeral 7 denotes a compression type spring 7 which is interposed in the small diameter portion 6a at the tip of the jack bolt 6 and has a function of pressing the front side of the knife 1. Reference numeral 8 denotes a plurality of hydraulic type film expanding devices which are mounted between the rear side of the knife 1 and the knife spindle 2 at positions facing the jack bolts 6, respectively, and the hydraulic pressure in the hydraulic chamber 9 is controlled by the adjusting bolts 10. It changes by the vertical movement, and the film 11 expands and contracts in the directions of arrows B and C.

Therefore, when correcting the runout of the end surface of the knife 1, the jack bolt 6 on the front surface is slightly loosened so that the end surface of the knife 1 is pressed only by the spring 7. In this state, when trying to move the knife 1 to the front side,
The adjusting bolt 10 is tightened to expand the film 11 and the knife 1 is moved in the direction of arrow B by a small amount. On the contrary, when moving to the rear surface side, the adjusting bolt 10 is loosened to shrink the film 11 and the knife 1 is moved by a small amount in the direction of arrow C. Then, after the position correction is completed, the jack bolt 6 is completely tightened and positioned until the tip of the jack bolt 6 hits the knife 1.

As shown in FIGS. 3 (a) and 3 (b), when the horizontal center line passing through the center point O of the knife spindle 2 is the X axis and the vertical center line is the Y axis, the upper end of the knife 1 is Necessary correction amount ΔT when the side is tilted by ΔS (mm) in the Y-axis direction
(Mm) is calculated by the following equation (1). ΔT = (a / 2) · ΔS / D K .................. (1) where, a; attachment of hydraulic拡膜8 Pitch (mm),
_DK : Outer diameter (mm) of knife 1.

As described above, according to the present invention, it is not necessary to loosen the lock nut 3 used for fixing the knife 1 each time when the shake of the knife 1 is corrected, and the shake correction amount of the knife 1 is hydraulically expanded. Since the value can be corrected to an arbitrary value by using the device 8, the correction work time can be greatly shortened and the accuracy can be improved.

[0014]

EXAMPLES Next, specific examples will be described. The pressing force F of the spring 7 shown in FIG. 2 is 10 to 25 kgf.
And the dimension of the insertion part of the knife 1, that is, the inner diameter D of the knife 1; 165.1 mmφ (tolerance H6: 0 to +0.025 mm
), Diameter of knife spindle 2; 165.1 mmφ (tolerance f
6: -0.043 to -0.068 mm). The outer diameter D _K of the knife 1 was 305 mmφ.

Then, the trimming device of the present invention in which the mounting pitch a of the hydraulic film expanding device 8 was 220 mm was operated in the following procedure. First, the tilt amount ΔS of the knife 1 in the Y-axis direction (see FIG. 3) was measured and found to be 0.03 mm. Next, the required correction amount ΔT is calculated using the above equation (1), and Δ
T = 0.011 mm was obtained. Therefore, the jack bolt 6 is loosened a little and the end face of the knife 1 is pressed only by the spring 7. Further, based on the calculation result of the required correction amount ΔT, the upper hydraulic type film expanding device 8 is reduced by ΔT = 0.011 mm, and the lower hydraulic film expanding device 8 is enlarged by ΔT = 0.011 mm, so that the knife 1 Fixed the upper and lower position of.

As a result, the end face runout amount ΔS of the knife 1 could be corrected to 0.005 mm or less over the entire circumference. In addition, the correction work time at this time is 1 compared with the conventional work.
It could be shortened to about / 3. As a result, the line stop time caused by the trimming trouble, which has occurred for 8 hours / month in the conventional method, can be greatly reduced to 1.5 hours / month or less in the method of the present invention.

[0017]

As described above, according to the knife end surface runout correcting device of the trimming device and the method of operating the same of the present invention, the knife is fixed by using the jack bolt and the hydraulic film expanding device, and the respective fixing positions are fixed. Since the knife end surface is corrected by adjusting the, the shake amount of the knife end surface of the trimming device can be corrected with high accuracy in a short time, which contributes to the improvement of the line operating time.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a trimming device of the present invention.

FIG. 2 is a partially enlarged cross-sectional view taken along the line II of FIG.

3A and 3B are explanatory diagrams of knife shake amount correction.

FIG. 4 is a side view showing an outline of a conventional trimming device.

FIG. 5 is an explanatory diagram of conventional knife shake amount correction.

[Explanation of symbols]

 1 knife 2 knife spindle 3 lock nut 4 bearing box 6 jack bolt 7 spring 8 hydraulic film expanding device 9 hydraulic chamber 10 adjusting bolt 11 film expanding

Claims (2)

[Claims] 1. A knife end surface runout correcting device of a trimming device, wherein upper and lower knives are fixed to a knife spindle using lock nuts, and the knife spindle is fixed to a bearing box via bearings. A plurality of jack bolts that are screwed in the circumferential direction and have a spring interposed at the tip thereof so that they can be brought into contact with the front side of the knife, and between the back side of the knife and the knife spindle. A knife end surface runout correction device for a trimming device, comprising: a plurality of hydraulic type film expanding devices which are interposed at positions facing the jack bolts and are capable of correcting the position of the knife. 2. A step of measuring an end face runout amount of the knife to obtain a necessary correction amount, a step of loosening the jack bolt and pressing the end face of the knife only by the spring, and based on the necessary correction amount. 2. The method of operating the knife end face runout correcting device of the trimming device according to claim 1, further comprising the step of expanding and contracting the hydraulic film expanding device to correct the end face position of the knife.