DE2248177A1 - PROCESS FOR SEPARATING THE REMAINING LENGTHS FROM THE ROLLING BARS DIVIDED TO SALE LENGTH - Google Patents

Description

PAT / 816 / Kia
- 2457 -

25-9.1972

22A8177

Method for separating the remaining lengths from the
Sales length of subdivided rolled bars

The invention relates to a method for separating the remaining lengths from the rolled bars divided into sales length, in which the
rolled out rods before being placed on the cooling bed, taking into account the cooling bed length and the smallest over the cooling bed
to be conveyed rod length and the determined by measurement and calculation,
The average overall length is initially divided into whole multiple lengths of the sales lengths, several multiple lengths are jointly conveyed away from the cooling bed and then divided into sales lengths
will.

Before dividing the bars into order or sales lengths
these are divided according to a known method (Klepzig Fachberichte 80 (1972) 2, page 104/108) in front of the cooling bed into partial lengths that allow optimal occupancy of the cooling bed. The partial lengths should also be the whole multiple of a sales length, so that when dividing the partial lengths on the cold shear or saw behind the cooling bed, there are no remaining lengths.

When dividing the total length, however, it cannot be reported that there is a non-salable remaining length in the last partial length. This must then laboriously by hand from the sales lengths
Are removed, or if they remain in the package, the price per kilo of the bundled package is reduced accordingly.
Purely sorting out by hand is not just a worker
required, but additional time is consumed for this operation, which means that finished rods can be applied
sinks.

In order to avoid this, it was decided for other systems cut the last part of the rod with the lower length in front of the cooling bed

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to separate and then for further processing of a leftover end adjustment to feed. However, this procedure is also cumbersome and also requires an additional system.

Efforts have already been made to get through exact predetermination of the length of use or the weight of the billets to enable an end-to-end splitting on the saw. However, these efforts had to fail because of the difficulty "caused by temperature differences, caliber wear, Eliminate the effects of scale etc. on the finished rod length.

The object of the invention is therefore, in a mode of operation of the initially mentioned type to find a way to the remaining lengths only after cooling on the cooling bed with the least possible effort to separate from the sales lengths. This object is achieved according to the invention in that when dividing the rolled out Rods in front of the cooling bed, the last multiple length of a rod is longer than that by the true length of the remaining length longest multiple length within a Kaitseherenlage.

This working method assumes, of course, that the cooling bed length is about one sales length longer than the maximum permissible partial rod length, thus the pre-calculated remaining length assigned to the longest bar of a seed roll length can. With this method it is achieved in a simple manner that the remaining lengths in the subsequent division of the joint The lifted Tel slopes are the last to be divided into retail lengths and can easily be pushed off across the roller table.

When calculating the remaining length, first of all the operating weight of the stick can be assumed. This weight is expediently fed to a computer, which under Consideration of the piercing and final cross-section, the surface-rolled

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Length is determined and a pair of scissors arranged in front of the cooling bed controls such that the length of the rolling rod, which is precalculated in its length, is divided into whole multiple lengths of the sales lengths, these partial lengths of a total rolling length being different from each other as well as to those of another total rolling length. Here, however, it must be taken into account that the partial lengths may only vary within the largest and the smallest lengths still to be conveyed via the cooling bed, the largest partial length having to be less than the cooling bed length by the amount of a sales length. According to the invention, the subdivision controlled by the computer should take place in such a way that the last and at the same time longest part length is assigned the computationally determined remaining length.

Since the remaining length or the total length can only be calculated theoretically in advance, any changes in length must also be taken into account. These changes can be caused by errors in the determination of the weight of the material to be used, or by different amounts of scale and crop lengths or changes in cross-section which are due to the wear of the gauge and temperature differences in the rolled stock. The differences in length resulting from these influencing variables can, for example, with an operating weight of 1,000 kg and a final rolled stock diameter of 12 mm, under unfavorable conditions, be up to 15 ra. In order to be able to detect these differences by control measurement and to be able to take them into account when dividing, it is proposed according to a further feature of the invention, depending on requirements, to provide the penultimate or the two penultimate partial lengths of a total rolling length in the computer program by one or more sales lengths shorter than the maximum partial length and the to carry out the control measurement related to the end of the rolling stock eo in good time so that a possible difference between the length determined from the weight and the actual length can still be added or deducted by the computer for the last partial lengths.

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The method according to the invention is described below with reference to Drawing explained. Show it

Pig. 1 a schematic representation of the rod trip from the last one Roll stand up to cold shears,

Fig. 2 shows a partial length bundle before dividing into sales lengths and

Fig. 3 four scissor layers formed from five billets with different maximum multiple lengths.

The bar 2 running out of the last roll stand 1 is from a flying scissors 3 divided into tel slopes, which one Feed roller table 4 and braked on this in the usual way will. The partial lengths are then conveyed over a cooling bed and at the end of the cooling bed 5 in a discharge roller 6 Collected in bundles according to the occupancy width of the roller table and divided into sales lengths of a cold shear or saw 7 supplied.

In front of the flying scissors 3 there is one designed as a photocell Measuring point 8, which indicates the passage of the rod tip to a computer 9. The computer 9 finds out the rod speed, for example via a tachometer 12 attached to the last roll stand, taking into account the roll diameter and the Bar end cross-section. The computer has already taken into account the operating weight of the rod before it enters the preceding and following rolled bars, the specified sales length and the minimum and maximum permissible document length of the KUHI bed the optimal partial lengths and the expected remaining length are calculated in advance and controls the scissors via a pulse generator 11 in such a way that the total rolling length in the determined partial lengths is divided. The remaining length is assigned to the last and, at the same time, the longest part length.

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In order to avoid the length deviations from the calculated total rolled length, which occur for known reasons, when dividing the rolled rod To be able to take into account, the partial lengths are expediently calculated in such a way that the second to last or the third to last and second to last part length are cut one or more sales lengths shorter than the maximum part length, in order to cut these two partial lengths shorter or longer by one or more sales lengths if necessary can. For this it is necessary that the stick weight The calculated rolled-out rod length is checked again before the last partial cuts Perform detectors 10, which are arranged correspondingly far away from the shears in the roller train and by a Control measurement determine the deviation from the precalculated rod length and communicate the value to the computer 9. This now has the option of determining the length deviations from the precalculated total rod length determined during the control measurement subsequently to the two penultimate shortened partial lengths z ^ i to distribute. Depending on the size of the deviation, one or more sales lengths will be deducted from the partial lengths in the event of a negative deviation and added to the partial lengths in the event of a positive deviation.

In Fig. 1 is shown using three examples, such as the Deviation in length caused by different rolling conditions from the calculated rolled bar length on the individual Part lengths' is distributed.

In the case of staff no. 1, it was initially calculated on the basis of the data that the first partial length was shorter than the maximum by one sales length Part length must be cut while the following part lengths except for the third and second to last, may have the maximum length. In the control measurement it was then found that the rolled rod is two sales lengths longer than it is due to the operating weight and the final cross-section should be. As a result, these two penultimate rods were also up cut the maximum length.

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In the case of rod no. 2, on the other hand, the control measurement showed a negative deviation from the pre-calculated length of about one sales length. The penultimate part length therefore had to be cut by two sales lengths _{VL shorter} than the maximum permissible length X mQ "'VL, so that the last part length X · VL 4-remainder length RL, as sought by the invention.

In ciX

together become longer than the maximum permissible partial length X _mQV * VL from the cooling bed.

Fig. 2 shows how the partial lengths of the rod no. 2 are in front of the scissors 7 and the remaining length RL after cutting off all sales length remains on the last partial bar of the total bar length. The remaining length can easily be pulled to the side by hand or by an automatically operated slide.

Fig. Jj shows how the computer works when he sheared cold must form, which have different maximum multiple lengths. The following are given as input constants:

a) Sales length 1 VL = 10 in

b) permissible minimum document length of the

Cooling bed 70 in = 7 VL

c) permissible maximum document length of the

Cooling bed 100 β = 10 VL

d) maximum possible deviation of the rolled bar length from the pre-calculated 10 m = 1 VL

e) 5 partial lengths each form a Kaitseherenlage.

On the basis of the weights, the computer has determined the following probable rolling lengths:

Bar 1 = 36? m rod 2 = 314 m Bar 3 = 362 ra Bar 4 = 335 η bar 5 = 318 D

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results 36 VL λ It 31 VL i ti 36 VL ^ ti 33 VL ^ η 31 VL -i Y RL Y RL h RL ν RL ι- RL

To the maximum possible deviations after the control measurement To be able to add or subtract from a sales length, the penultimate multiple length of a bar by at least one sales length shorter than the maximum multiple length and at least one retail length longer than the minimum document length of the cooling bed be.

The computer now divides as follows j

Bar 1:

1, Part length S = Q VL 2 .Part length = 8 VL 3 .Part length = 9 VL 4th .Part length = 10 VL + RL

to SL I

(SL = cold shear position)

results together

VL + RL

With bar 2 it turns out that the maximum multiple length here can only become 9 VL, since the minimum multiple length must be 7 VL and the penultimate multiple length must be at least 8 VL. Bar 2 becomes so divided:

Bar 2:

1. Part length

2. Part length

3. Part length

4. Part length

7 VL

7 VL

8 VL

9 VL + RL

to SL I to SL II

results together

VL + RL

The first two partial lengths of the rod 3 are still required for the 2nd scissor layer SL II. You must not be larger than a £ so 9 VL. After that, however, the computer has to set the maximum multiple length back to 10 VL, since it has a maximum multiple length of 9 VL after the later control measurement in the event of too much nothing more to the penultimate part length, which is already 9 VL would be long, should hit.

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Bar 3:

1. Part length

2. Part length

3. Part length

4. Part length

- 9 VL

- 8 VL

»9 VL

«10 VL + RL

to SL II

to SL III

results in ζübammeη

Bar 4 is first divided:

Bar 4:

36 VL + RL

1. Part length - 7th VL I. to SL III 2. Part length - 7th VL ¹ 3. Part length = 9 VL ) to SL IV 4. Part length «10 VL H ^ RL

results together

33 VL + RL

At bar 5, however, the computer determines that again only a maximum multiple length of 9 VL can be formed. However, since the last part length of the rod 4, which together with the part lengths of bar 5 which forms the Kaltecherenlage SL IV «has already been set to 10 VL + RL, bar 4 must be re-divided:

Bar 4:

1. Part length - 7th VL to SL III 2. Part length - 9 VL < 3. Part length - 8th VL [ RL) to SL IV 4. Part length . 9 VL +

results together

33 VL + RL

Rod 5 is split ι

Bar 5 "

1st part length - 7th VL 2nd part length - 7th VL < 3. Part length - 8th VL; 4. Partial length - 9 VL + RL -

results together

- 31 VL + RL

to SL IV

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In this way, the entire batch is produced immediately after the weight measurement the billet in front of the furnace is pre-divided by the computer. So it is clear long before a rod is rolled out, how it is divided. This gives the computer enough time a member, if necessary as in the example member 4, retrospectively to redistribute.

Stfibe failing due to disturbances are treated as if they had not failed ^ that is _, "the corresponding cold viewer situation is only incompletely filled and is also so through the cold scissors", B © i! Divide the following idea rod © again.

In the case of very large sales lengths (e.g. 2km) , it is advisable to distribute the remaining length over the last two four-fold lengths in order to obtain the amount required for the remaining pieces. Overhang of the cooling bed as small as possible

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Claims (1)

- 10 - PAT / 816 / Kia - 2457 - 25.9.1972 Claims ί 1. ^ Procedure for "separating the remainder from the rolled bars divided to the sales length, in which the rolled bars before placing on the cooling bed taking into account the cooling bed length and the smallest rod length to be conveyed via the cooling bed and the total length determined by measurement and calculation initially in whole multiple lengths of the sales lung divided, each with several multiple lengths of cooling bed like to? demanded and then further subdivided into sales lengths, characterized in that that when dividing the rolled bars in front of the cooling bed the last multiple length of a rod is longer than the longest multiple length by the true length of the remaining length within a Kaltsoherenlage. 2, method according to claim 1 * characterized in that «the penultimate or the two penultimate multiple lengths of a total rolling length Shortened by one or more sales lengths are called din maximum multiple length within a Cold scissors position, and d & fl one before the last partial cuts Control measurement based on the end of the rolling stock is carried out, on the basis of which the deviation of the rolled rod length from the calculated rod length is determined and when cutting the last multiple lengths can be taken into account accordingly. 3. The method according to claim 1, characterized in that the Remaining length on two multiple lengths, which are the maximum multiple lengths must be distributed within a cold shear position will. 409815/0 5 21 Blank page