JPH045218Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is used to cut multi-row strips to form products by cutting strips such as long steel formed by a rolling mill etc. into predetermined dimensions. Regarding equipment.

(Prior Art) The above-mentioned strips have conventionally been cut into products using cutting devices as shown in FIGS. 3 to 7.

To explain this device using diagrams, Figs. 3 and 4.
In the figure, the rolled strip is cut by a dividing shear (not shown) into strips M, which are intermediate molded products, having the same dimensions. Further, a cooling bed rake device 1 is provided which transports these strips M in the lateral direction indicated by arrow A in the figure while cooling them. A stacking table 2 is provided on which the strips M transported by the cooling bed rake device 1 are temporarily arranged side by side. In this case, these strips M are arranged side by side on the accumulating table 2 in the order in which they arrived on the accumulating table 2.

Here, for convenience of explanation, the first strip M that first arrived at the accumulation table 2 is designated as M ₁ , and the
M ₂ , M _{3 .} . . , and therefore, the n-th strip M is designated by the symbol _Mo. When the number of strips M reaches a predetermined number n on the accumulation table 2, the traverser 3 transfers these strips M from the accumulation table 2 to the roller table 4, which is a conveyor, in the same order as they were arranged side by side. (Indicated by arrow B in the figure).

In FIGS. 5 and 6, the roller table 4 supports the plurality of strips M arranged in parallel as described above in the horizontal direction as shown by arrow C in the figures, and in the longitudinal direction forward of the strips M. Transport towards.

In the middle of the roller table 4 in the conveyance direction,
A sizing machine 6 is provided to align the front ends of the strips M on the roller table 4 with each other in the front-rear direction.
That is, this sizing machine 6 has a sizing stopper 6a that abuts the front end of each strip M at approximately the same position in the front and rear while the roller table 4 is conveying the strip M to prevent the strip M from moving. have. This sizing stopper 6a is movable up and down, and by raising this sizing stopper 6a, the strip material M is allowed to move forward of this sizing stopper 6a.

The roller table 4 is lower than the above-mentioned sizing stopper 6a.
A cutting machine 7 for cutting the midway portion of each of the strips M is provided at a position a predetermined distance apart from the fixed size stopper 6a on the rear side in the conveyance direction. This cutting machine 7 is composed of a cold shear or a saw.

In the above case, the dimension from the sizing stopper 6a to the cutting machine 7 matches the sizing size of the product G to be obtained by cutting the strip M, and therefore
If the front end of the strip material M is brought into contact with the sizing stopper 6a and the strip material M is cut by the cutter 7, a product G of the desired sizing size will be obtained.

In the above case, the temperature of the strips M arranged in parallel on the roller table 4 is set from the first M ₁ to the nth M _o
Assuming that T ₁ , T ₂ , T ₃ ...T _o (℃) for
Since the one that reaches the roller table 4 first is cooled for a longer time, T ₁ <T _o .

Here, if n = 100 pieces and the time pitch when the strips M are sequentially arranged on the stacking table 2 from the cooling bed rake device position is 4 seconds, then the first strip M ₁ is placed on the stacking table 2. 400 since being listed on 2
After seconds, the 100th strip M ₁₀₀ will be added to this accumulation table 2.
It will be sent to the top. Therefore, the above strip material
M ₁ is cooled for 400 seconds longer than strip M ₁₀₀ , so T ₁ <T ₁₀₀ . The temperature difference ΔT=T ₁₀₀ −T ₁ between the two above due to the actual machine is the pitch and strip M
Although it varies depending on dimensions etc., approximately ΔT = 50 to 160℃
becomes.

(Problem to be solved by the invention) By the way, the strip material M is cut to a regular size as shown in FIGS. 5 and 6 while maintaining the temperature difference as described above, and this is called the product G. If this happens, the following inconveniences will occur. That is, as shown in FIG.
Immediately after cutting, the above product G has the same dimensions, but as time passes, it cools down to room temperature.
When reaching T _p , the higher the original temperature, the greater the amount of shrinkage. Therefore, if the final dimensions of each strip M ₁ to _{M o} are ₁ to _o , then ₁ > ₂ ... > _o . .

Here, to show the actual measured value, = 12m, T ₁
= 120℃, T _o = 280℃, T _p = 20℃, ΔP
= 160°C, − ₁ = 15.6 mm, ₁ − _o = 25 mm, and there is a large dimensional error between these products G.

Therefore, in the past, the strip material M was cut with the largest possible value among the above dimensional errors, and the strip material M was cut slightly longer so that the dimensions of the product G would not be insufficient when the temperature reached room temperature. ing. However, this results in some of the many products G being excessively large, which causes a decrease in yield. In addition, recently, mass production of the product G has been carried out, which requires a long time to accumulate a predetermined amount of strips M on the accumulation table 2, and therefore the above temperature difference ΔT This increases the
In this case, if this temperature difference ΔT becomes too large, some of the products G cut at the same time will
The dimensions of Tp are as per Japanese Industrial Standards (JIS) at room temperature _Tp.
There is a possibility that the range of tolerance (+O to +α) determined by

(Purpose of the invention) This invention was made with attention to the above-mentioned circumstances, and when forming products by simultaneously cutting multiple high-temperature strips placed side by side, it is important to keep these products at room temperature. The purpose is to improve the yield by preventing the lengths of these products from becoming excessive, and to ensure that the products have uniform desired dimensions when brought to room temperature. .

(Structure of the device) The feature of this device for achieving the above object is that the front ends of each strip are brought into contact with each other at approximately the same position before and after the strips are conveyed by the conveyor. In a multi-row cutting device that is equipped with a sizing stopper that prevents movement, the inclination of the sizing stopper is made variable in the direction along the conveyor, and the temperature of the strip before being cut by the cutting machine is controlled. The present invention is characterized in that a temperature detection means is provided and the inclination of the sizing stopper is changed based on the temperature difference between the strips in the width direction of the conveyor calculated from the detection signal.

(Example) An example of this invention will be described below with reference to FIGS. 1 and 2.

The basic configuration of these embodiments is the same as the conventional configuration. Therefore, the common configurations will simply be designated by their reference numerals in the drawings and their explanations will be omitted, and only the different configurations will be explained.

(First example) FIG. 1 shows a first embodiment.

One end of the sizing stopper 6a is supported by a vertically oriented pivot shaft 9 so as to be rotatable back and forth as shown by arrow D in the figure. If this pivot shaft 9 is rotated and tilted to a certain extent with respect to the width direction of the roller table 4, the position where the front end of each strip M comes into contact can be varied back and forth for each strip M. can.

One end of a bolt-type push shaft 10 is connected to the rotating end of the sizing stopper 6a.
0 is interlocked and connected to an electric motor 12 as a drive source via a worm gear 11. When the electric motor 12 operates, the push shaft 10 moves back and forth by an amount commensurate with the amount of operation, and the push shaft 10 rotates the sizing stopper 6a by that amount.In other words, the roller table The inclination of the sizing stopper 6a is variable in the direction along 4.

On the other hand, a pair of temperature detection means 14, 14' detects the temperature of the strip material M immediately before being cut by the cutting machine 7.
is provided. One of these temperature detection means 14 detects the temperature of the first strip _M1 , and the other temperature detection means 14' detects the temperature of the nth strip _M0 . In the illustrated example, these temperature detection means 14, 14' are of a non-contact type, but they may be of a contact type.

The electric motor 12 is actuated by the detection signals from both temperature detecting means 14, 14', and the amount of rotation of the sizing stopper 6a is automatically controlled. That is, the temperature detection means 14, 14'
The temperature difference ΔT between T ₁ and T _o detected at , that is, the temperature difference between each of the strips M ₁ to _{M o} in the width direction of the roller table 4 is converted by the converter 15 into the amount of rotation of the sizing stopper 6a. . This is then input to the control panel 16, and the electric motor 12 is operated by the output signal from the control panel 16. The result of the operation of the electric motor 12 is detected by a position detector 17, and the output signal of the position detector 17 is fed back to the control panel 16, and the sizing stopper 6a is stopped at an inclination corresponding to the temperature difference ΔP.

According to the above control, the position where the front end of each strip M contacts the sizing stopper 6a can be adjusted to match the temperature of each strip M. Therefore, when cutting the strip material M to form the product G,
The cutting length can be controlled so that the product G has the desired dimensions when the temperature reaches room temperature.

(Second Embodiment) FIG. 2 shows a second embodiment. In this example, the pivot shaft 9 in the first embodiment is removed, and in its place a push shaft 10 and a position detector 17 attached thereto are added. In this case, each push shaft 10 is moved back and forth in response to the detection signals from both temperature detection means 14, 14' (arrow E in the figure), and the sizing stopper 6a is thereby moved back and forth, and the angle Changes are possible.

(Other Embodiments) Although the above is based on the illustrated example, the sizing stopper 6a of the sizing machine 6 is not only an elevating type but also a roller table 4.
It may be a girder type that moves in the width direction, or it may be moved using a screw jack. Also,
The longitudinal movement of the sizing stopper 6a may be adjusted manually. Furthermore, in the above embodiment, the sizing stopper 6a
The means for tilting the
1 and electric motor 12, this may be one using a hydraulic cylinder or a wedge.
Further, the electric motor 12 at this time may be a fluid pressure pump operated by hydraulic pressure or pneumatic pressure.

(Effect of the invention) According to this invention, in the direction along the conveyor,
While making the inclination of the sizing stopper variable, a temperature detection means is provided to detect the temperature of the strip material before it is cut by the cutting machine, and the temperature between each strip material in the width direction of the conveyor is calculated from the detection signal. Since the inclination of the sizing stopper is changed based on the difference, by tilting the sizing stopper, the front end positions of the respective strips on the conveyor at high temperatures can be adjusted simultaneously. If a plurality of strips adjusted in this manner are cut at the same time, a plurality of products each having a predetermined size when the temperature reaches room temperature can be obtained at once.

As a result, firstly, each product can be molded so that the length thereof does not become excessive, so that an improvement in yield can be achieved. Also, secondly,
Since the products can have uniform desired dimensions when they reach room temperature, each product can be made to conform to desired standard dimensions.

[Brief explanation of the drawing]

Figures 1 and 2 are schematic plan views showing the first and second embodiments of this invention, Figures 3 to 7 are views showing conventional examples, Figure 3 is an overall plan view, and Figure 4 is a diagram showing a conventional example. is a view taken along the - line in Fig. 3, Fig. 5 is an explanatory view of the action corresponding to Fig. 3, Fig. 6 is a side view corresponding to Fig. 5, and Fig. 7 is a view of each product when it reaches room temperature. This is a diagram. 4... Roller table (conveyor), 6... Sizing machine, 6a... Sizing stopper, 7... Cutting machine, 1
4,14'... Temperature detection means, M... Strip material, G...
…product.

Claims (1)

[Scope of utility model registration request] A conveyor is provided that conveys a plurality of strips arranged in parallel toward the front in the longitudinal direction, and the front ends of each strip are brought into contact with each other at approximately the same position in the front and rear while the conveyor is conveying the strips. A multi-row cutting machine is provided with a sizing stopper to prevent the movement of the sizing stopper, and a cutting machine is installed at a position rearward of the sizing stopper and a predetermined distance from the sizing machine to simultaneously cut the middle part of each of these strips. In a strip cutting device,
While making the inclination of the sizing stopper variable in the direction along the conveyor, a temperature detection means is provided to detect the temperature of the strip material before it is cut by the cutting machine, and the width of the conveyor is calculated from the detection signal. A cutting device for multi-row strips, characterized in that the inclination of the sizing stopper is changed based on the temperature difference between each strip in the direction.