JP3109947B2 - Automatic cutting method of steel sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nesting method for hot-rolled thick steel plate for gas cutting, and more particularly to a nesting method for as roll (AS ROLL) plate from a healthy part. And a method for automatically cutting NC based on the nesting method, which enables optimum and efficient cutting.

[0002]

2. Description of the Related Art In an ironworks, a hot-rolled thick steel plate is cut into a predetermined product size using a cutting machine.
This cutting method is roughly divided into mechanical cutting methods such as double side shear and end shear, gas, plasma,
There is a fusing method using a laser or the like. Although the mechanical cutting method enables high-efficiency cutting, there is a limit to the cutting thickness.
(Currently, it is not possible to cut a steel plate with a thickness of about 50 mm or more.) Also, when cutting a complicated shape from a single material or when the material has a large lateral bend (camber) Not applicable.

In such a case, a fusing method is used. Therefore, generally, both a mechanical cutting machine and a fusing type cutting machine are installed in a plate rolling mill. In addition, cutting by the fusing method (hereinafter collectively referred to as gas cutting) requires a large number of man-hours compared to the mechanical cutting method, lowers productivity, and also has a poor working environment. Promotion of automation and automation is required.

[0004] By the way, in the gas cutting described above, a gas cutting machine having a gate type structure is run on a rail, and a steel plate to be cut (a side is provided with an ear, and a tail end is provided on a platen (table)). An as-rolled steel plate with a crop (hereinafter, referred to as a “raw material”) is cut into predetermined product dimensions.

[0005] In this cutting operation, the material is delivered by a crane (or other transporting means) and then finished in the following procedure.

First, the operator takes into account the cutting margin for each material, cuts product dimensions, required test piece dimension lines (marking lines)
On the surface of the steel sheet Perform cutting work while moving the cutting machine aiming at this marking line After cutting, inspect the cross section (especially hot water balls, dross remaining, cross section roughness, crater flaws, dimensional accuracy, etc.) Carry out the stamping and labeling. Dispense the product by crane or other transportation means.

[0007] Japanese Patent Application Laid-Open No. 1-95872 discloses a technique for cutting a steel sheet.

[0008]

However, according to the above-mentioned prior art, the planar shape of the material and the mounting state from a predetermined reference line are recognized by a shape recognition device, and after the planned cutting line is determined, On the spot (the material is not moved to another place by a crane or the like), a series of the above operations (1) to (5) are performed in series, one by one, for the material to be cut.

[0009] In the as-rolled material, there is a case in which the end portion is entangled and there is a case where an extreme warpage occurs. Therefore, it is not always necessary to determine the product taking only from the planar shape of the material. Can not. This is a problem especially in the situation where the cut-off margin has been reduced due to recent high-yield designs. Also,
In the case of a gas cutting material having a relatively thick material, the amount of entrainment tends to be large, so that the judgment requires visual or means using another detector. (A solution to this problem in the present invention will be described in detail in the teaching method described below.) In addition, when performing automatic cutting using numerical control (hereinafter, NC), numerical input is indispensable. There are various types of cutting patterns for removing a plurality of products and test pieces (TP) from one material.

Therefore, it is extremely troublesome to input numerical values to the NC each time. For this reason, a large amount of time is required until the cutting is completed, and work errors are likely to occur. As a result, work efficiency and productivity have been reduced.

If a computer is used to set the product and TP, the marking line is entered by the NC, the automatic selection of the cutting model (determined from the cuttable thickness limit, efficiency comparison), the NC cutting condition instruction (selection of the used cutting torch number) If the transfer order of each torch and the cutting speed instruction are automatically scheduled, the working efficiency and the degree of freedom can be drastically improved.

Furthermore, if each function of cutting work (marking, cutting, embossing display) is continuously processed in the same place as in the conventional example, it is not possible to perform parallel processing on a plurality of steel plates. However, there is a disadvantage that work efficiency is poor.

In cutting out a plurality of products and TPs from one material, the amount of movement of each member on the surface plate due to thermal deformation or the like is minimized. Is an important point.

Accordingly, an object of the present invention is to provide a teaching and nesting method of steel plate cutting, which enables cutting from an as-roll plate to be efficiently and freely performed by cutting means employing NC, and a method of automatic NC cutting based on the method. To provide.

[0015]

To achieve the above object of the Invention The present invention resides in that in Claim 1, is formed on the material surface
Fusing multiple products from the material based on the broken marking line
In the automatic cutting method of the numerical control system to cut more automatically
The cutting line between the products to be acquired is T-shaped during plasma cutting.
When it becomes a shape, and when it becomes a cross shape when cutting gas,
Set the plane perpendicularity of these products and scratch the products
To set stable cutting conditions without
Further, in claim 2, based on the teaching line
To detect the edged end face of the material, and based on this detection result
The cutting torch from the outside to the inside
At a slower speed, and a steady speed in the product cutting area.
I try to do it.

[0016]

According to the above-described means, the marking line is set based on the teaching data obtained by teaching the periphery of the steel sheet to be cut, and the distance between the teaching line and the periphery of the cutting line can be set to the shortest distance to perform sheet removal. A search is made to determine whether or not the marking line is present, and the cutting coordinate point is obtained. As a result, the product can be removed from the center of the healthy part of the as-rolled base material while avoiding the crop and the entangled part, and NC automatic cutting can be performed.

Further, when cutting a plurality of products into a material based on product data, if the cutting line between the plurality of products is T-shaped or cross-shaped, the cutting conditions are set for plasma cutting and gas cutting. Automatic disconnection is performed. Further, in order to prevent the product from moving on the table due to thermal deformation or the like, the product is sequentially separated from the outer product. As a result, high cutting dimensional accuracy can be secured.

Further, the end face detection sensor detects the end face of the material with ears with reference to the teaching line, and the torch speed of the gas cutting torch is reduced at the eared portion, and is returned to the steady speed when cutting the product. As a result, automatic cutting from the end face of the material with ears becomes possible.

[0019]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory view for explaining a nesting method for cutting a steel sheet according to the present invention. FIG. 2 is a plan view showing a schematic configuration of a steel sheet cutting line to which the steel sheet cutting nesting method according to the present invention is applied.

As shown in FIG. 2, the transport table 10, N
Marking device 12 by C (numerical control), combined plasma / gas cutting machine 14 by NC, gas cutting machine 16 by NC
(Each of the cutting machines 14 and 16 is provided with a cutting platen). Each of the cutting machines 14 and 16 is continuously arranged on a straight line. A temporary storage place 18 is provided side by side with this line, and a transfer table 24 is further provided side by side with the temporary storage place 18. An engraving machine 26 is provided at the upper part of the latter stage of the transfer table 24.
And a marking device 28 are provided. In addition, an overhead crane 30 is disposed so as to be able to travel on the ceiling of the building so as to be able to move to the upper part of each of the marking device 12, the cutting machines 14 and 16, the temporary storage place 18, and the transport table 24.

The marking apparatus 12, the combined plasma and gas cutting machine 14, and the gas cutting machine 16 are controlled using a control device and a computer (all not shown) for controlling the whole. The temporary storage area 18 is used for the completed marking material 2 after the marking is completed.
0 and a place for temporarily storing the cut-completed material 22 that has been cut by the cutting machine. Also, the stamping machine 26
Is used to imprint numbers, symbols, and the like on the surface of the steel sheet, and the marking device 28 is similarly used to print numbers, symbols, and the like on the surface of the steel sheet.

Here, the flow of the product will be described.
The marking is automatically performed on the material carried into the marking device 12 by the transport table 10, and the marking-completed material 20 with the marking completed is carried into the temporary storage 18. The target material here is an azroll base material having ears on the sides and crops on the ends, and a plurality of test pieces (T
P) is attached. In addition, there are cases in which the camber is large and a plurality of products are divided and cut, and cases in which an additional plate treatment or a plate reduction (switching) treatment is performed depending on the material.

The marking-completed material 20 is transferred from the temporary storage 18 to the cutting machines 14, 16 or the transport table 24 by the overhead crane 30 in accordance with the instruction. The cutting completion material 22 that has been cut by the cutting machine 14 or the cutting machine 16 is:
The crane 30 is transported again to the temporary storage area 18, and then the overhead crane 30
Is transferred onto the transport table 24, and is carried into the stamping machine 26 and the marking device 28, where predetermined stamping and marking are performed.

The marking operation in the marking device 12 is as follows.
(1) Material supply → (2) Stick a barcode on the surface of the material (this meaning will be described later) → (3) Read the barcode number using a barcode reader mounted on the marking device → (4) ) Teaching → (5) Nesting →
(6) NC marking and automatic setting of cutting conditions → (7) Conversion to NC data → (8) Transfer of NC data to data server (buffering) → (9) Automatic marking (predetermined product, TP removal on the surface of material) Enter the marking line of the product, TP
(The number is automatically entered.) → (10) Discharge of the scribed material, and the above steps are performed.

As described above, at the stage of the marking work, a plurality of materials are collectively processed and, at the same time, all the cutting setups are completed. The various data required for NC cutting is based on the material number (which matches the barcode number) as a key.
Store on data server.

Here, the meaning using the barcode will be supplementarily described. The material after the above marking is placed in the temporary storage area 18
To be temporarily placed in the cutting machine 14 or 1
When the material is supplied to the machine 6, the material number must be recognized by the cutting machine 14 or 16. If the material number is input by hand, there is a danger of inputting errors at the same time. We used barcodes to match numbers.

Next, after the raw material is supplied from the temporary storage 18 to the platen of the cutting machine, the cutting operation in the cutting machine 14 or 16 is performed in the following procedure.

(1) Using a bar code reader mounted on a cutting machine, read the bar code number attached to the surface of the material → (2) Cutting the material under conditions corresponding to the bar code number Automatically request the conditions to the data server, transfer the data to the NC controller of the cutting machine → (3) Read the inclination of the material on the surface plate using the marking line → (4) Based on the inclination angle NC cutting of the product and test piece along the marking line → (5) Product inspection, care → (6) Dispensing.

The marking line is necessary for the following reasons.

I. Since the place where the material has been taught and nested is different from the place where the cut is made, a mark indicating the start point of the cut is necessary due to the mechanical operation when the cut is started by the cutting machine.

Therefore, if a marking line is drawn on the material, the starting point of the cutting becomes clear and at the same time, a work error can be prevented.

II. When reading the inclination angle of the material of the above (3) on the surface plate, at least one of the rectangular marking lines
One is necessary. The remaining planned cutting lines (marking lines) are stored in the data server, and NC cutting can be performed on all planned cutting routes (the lines need not be inserted above the material) without any problem in the operation of the machine. . Therefore, if there is a marking line of a length (about 4 to 5 m) from which the inclination angle of at least one material can be read, the cutting machine is transferred to the cutting surface along the marking line, and the inclination angle of the material is determined by the NC controller of the cutting machine. Automatic disconnection is possible by letting.

III. Since the planar shape of the raw material is indefinite, if the rectangular marking line is drawn on the surface of the raw material, the operator can know the expected cutting line, so that there is an advantage that the operator can work with peace of mind.

Next, up to execution of the marking process by the marking device 12 will be described with reference to FIG.

It should be noted that S in FIG. 6 means a step.

First, as shown in FIG. 2, a material is carried into the marking device 12 (S101), and teaching is performed by the marking device (S102).

The teaching process is a process in which a CCD camera mounted on a marking device is used, and the camera position is moved along the outer edge of the material together with the marking device. data operation of the unshown each coordinate point from the lowest four to about 20 points
It is stored in the commercial computer . That is, in order to cut a predetermined product from a sound portion of a material having an indeterminate planar shape, it is necessary to recognize a sound range of the material. If at this time
If there is entanglement of the steel plate edge or local warpage,
Mark the unhealthy part of the material in advance with chalk on the surface of the material so that it can be seen along with the outer edge of the material through a CCD camera. Is possible.

Before the teaching process, the bar code is issued based on information from the host computer ,
Affixed to the surface of the material, furthermore, the bar code, which is also read by the bar code reader mounted on the scribe device, the previous teaching data, calculation data creation
Remember in the machine . During this time, in order to store the teaching coordinate points of the material, the material is kept stationary on the surface plate (or table).

Next, the data creation computer performs nesting (product and TP setting ) (S103).

[0041] The nesting, from almost the center of the sound range of the material that has been recognized by the previous teaching, host
Based on the information from the computer, the cutout position of the product and the TP is determined. By performing this processing automatically, the product and T
P setting can be set .

Next, with respect to the data from the data creating computer, NC data necessary for performing NC disconnection by an NC data converter (not shown), that is, NC marking conditions (setting of torch transfer order and required It is converted into the entry position (coordinate setting) of the production number and the like and the NC cutting conditions (cutting machine selection, cutting path route setting, torch transition order, torch speed, acceleration / deceleration, interval between torch and steel plate, etc.) (S1)
04). The marking device 1 based on the marking condition data
2 automatically performs the marking process (S105). As described above, the marking content is automatically filled in the marking line on the steel plate,
The production number and test piece number are automatically entered on the steel plate. The material whose marking has been completed is transferred to the temporary storage place 18 by the overhead crane 30.

The result of the marking is stored in the data server, and is read together with the NC disconnection condition at the time of disconnection.
It is used as automatic cutting control data for the designated cutting machine 14 or 16 (S106). Before cutting, the material to be cut is temporarily transferred from the temporary storage 18 to the overhead crane 3.
It is carried into the surface plate of a cutting machine using 0 (the operation is manual).

At the time of this automatic cutting, the cutting machine 14 or 16
Tracking is performed based on a barcode read by a barcode reader mounted on the PC, and automatic cutting is started based on cutting conditions from the data server as described above. The cut product is transported to the next step (S1
07), the attached test piece (TP) is sent to the test piece processing center. In addition, the cutting record of the cut product is taken into the host computer.

Here, the nesting method for cutting steel sheets according to the present invention will be described with reference to FIG.

The product 1 and the product 2 are obtained by cutting the material in the middle. In many cases, the material carried into the marking device 12 is carried with an inclination (plate skew angle Θ). . Therefore, when performing marking, it is necessary to perform marking in a state where the plate skew angle Θ = 0. Further, the material has crops, entanglements, and the like, and it is necessary to avoid these and trim the product.

Therefore, in the present invention, nesting is automatically performed according to the following procedure.

I Calculate the board skew angle Θ II Execute the rotation of the coordinate axes III Set the board width side marking planned line IV Search for the shortest distances A1 and A2 V Determine the board width side marking line (A1 = A2) ) VI Set the plate length side marking expected line VII Search for the shortest distances B1 and B2 VIII Determine the plate length side marking line (B1 = B2) IX Each cutting coordinate point (x1, y1) to (x4, y4) X Display the determined marking line on the display screen (CRT of the terminal device of the computer). XI Move to the automatic cutting path setting.

By performing such a process, it is possible to perform the board removal of the product without fail in the shortest time.

In order to calculate the plate skew angle の of I, each point on one side of the material among the coordinate points on the outer periphery of the material read into the data creation computer at the time of the teaching is approximated by a straight line. The inclination angle with respect to the table edge line is the skew angle (の) of the material.

Next, a method for automatically setting a cutting path will be described.

FIG. 3 is a diagram for explaining automatic setting of a cutting path. In FIG. 3, (a), (b), and (c) show cutting with one torch (cutting jig), and (d), (e),
(F) shows cutting by two torches. First, 1
In the case of sheet taking, as shown in (a), the torch is moved from the start position along a marking line (solid line in the figure) as [1] → [2] → [3] → [4]. In the case of two sheets, as shown in (b), one side in the length direction is cut by [1] → [2], and then the torch is moved to the opposite side to [3] → [4]. ]. Next, the torch is moved so as to separate the test piece, and finally, the middle between the products 1 and 2 is cut at [12]. Further, in the case of a material with ears, the test piece is cut by the torch movement of [1] to [5] as shown in (c), and then the end of the product 1 is cut by [7]. Intermediate between product 1 and product 2 [8]
Disconnect with

In the case of taking one sheet with two torches,
[1] → [2] → [3] ・ As in the case of a single torch
The torch is moved as shown in Fig. 3 except that two torches are moved at the same time. Further, (f) is an example of a combination of an ear plate and a cutting plate. In this case, a medium margin (cut-out margin) is taken in the middle.

As described above, the method of setting the cutting path route is as much as possible outside the material for the purpose of minimizing the amount of movement of the cutting member on the surface plate due to thermal deformation or the like of the cutting member. The TP or the product is separated first, and the cutting line between the products is considered to be performed last.

Next, the cutting process using the torch will be described in detail.

FIG. 4 is an explanatory view showing a cutting procedure when cutting is performed by using two torches. Note that white circles in the figure indicate the product cut start points, and black circles indicate the cut-off points.

(1) First, a bar code label recording the material number attached to the material is read, and cutting condition data corresponding to the material number is transferred to the cutting machine. (3) Reading the reference line M-N points (N is the origin) (4) Recognizing the plate skew angle (Θ) (5) Cutting start, between A and B torches (6) Detect the end face on the front side of the plate (specifically, detect the end faces at points a and b from inside the product using an air height sensor) (7) Start preheating of the B torch (about 15 seconds) (8) B-torch side incision start (9) B-torch temporarily stops when reaching preheating start point on A-torch side (10) A-torch preheating start (about 15 seconds) (11) A-torch and B-torch both incision (12) B torch cuts product When reaching the starting point, the width of the product is cut along the skew angle of the plate. (13) The width is cut toward the tail (TAIL) (FIG. 4).
[1]). In this case, continue the detection of the tail end face with the air height sensor and make each torch height follow the flatness of the plate. (14) Continue cutting until the detection of the far end face on the tail side (up to point M). (15) A torch and Fire extinguisher B torch (16) Cross cut on tail side ([2] in Fig. 4) (17) Machine movement (from tail to front), cross cut on front side ([3] in Fig. 4) (18) Machine movement (from front to middle) (19) Middle cross cutting ([4] in Fig. 4) (20) End of cutting (21) Data of cutting results (dimensions, used torch number, cutting time, etc.) are sent to the host computer Transfer to

In this embodiment, since the cutting is performed by using the plasma cutting machine and the gas cutting material machine, there are some restrictions due to the characteristics of the respective cutting machines. In the following, the constraint conditions for setting the cut path route will be described with reference to FIGS. 5, 7, 8, and 9. FIG.

When a plurality of products are to be cut, typical cutting patterns are as shown in FIGS. 5A and 5B. That is, there is shown a case (a) in which the cutting lines adjacent to each other are T-shaped, and a case (b) in which the inner cutting lines are cross-shaped.
(A, B, C) products are obtained. In case (b), 4
The product (D, E, F, G) can be obtained.

First, the constraints at the time of plasma cutting will be described.

In this case, as shown in FIG. 7, a plurality of cutting means can be considered. FIG. 7 corresponds to FIG. 5 (a). In FIG. 7 (a), first, the cutting between the products B and C is performed, and then the boundary with the product A is cut in the width direction. It is. In FIG. 7B, the product B is cut along the inner circumference, and then the boundary between the product A and the product C is cut.

FIG. 7 (c) is an example in which FIG. 7 (a) is replaced with that of FIG. 7 (d), and FIG. 7 (d) has the same cutting direction as that of FIG. It is an example. Further, a cutting method as shown in FIG. 7E is also conceivable, but it is not preferable because the cutting start point is centered.
However, when it is unavoidable to adopt this cutting method, a medium margin (cut-off margin) is provided, and both sides are cut.

In the cutting method shown in FIG. 7, the cutting method (a) is most recommended, and then the method (b) is preferable. And (c) is less preferred, (d),
(E) is a bad method. The reason is that the diameter of the plasma arc becomes large as shown in FIG. 8 at the start of the cut, and the cut is generated on the product side.

Next, restrictions on cross cutting by the gas cutting machine will be further described with reference to the drawings .

FIG. 9 shows details of a cut portion when gas is cut between the product A and the product B. FIGS. 9A, 9B, and 9C are plan views, cross-sectional views, and cutting speed characteristics. Is shown. As shown in FIG. 5B, when the cutting line has a cross shape, the cutting is performed after the cutting, but when the cutting is attempted after the cutting, the torch is moved from the product A to the product B. , A cutting width (groove) is generated, leading to insufficient preheating on the product B side (that is, cutting is impossible). Therefore, as shown in FIG. 9C, the torch speed is reduced (for example, 70%) at the cut portion and in the vicinity thereof, and the torch is temporarily stopped for a predetermined time.

Here, the cutting speed of 100% in (c) means that
It refers to the value of the appropriate cutting speed for the thickness of the cutting material.

Next, a method of cutting (running cut) from the material end face of the lug material at the time of gas cutting will be described.
This will be described with reference to FIG.

First, as shown in FIG. 10A, the end face detection sensor 32 is moved from a certain position inside to the outside (end face side) with reference to the teaching line. Determine the end face. Next, as shown in FIG. 10B, the torch 34 is moved from the side surface direction to the plate center direction based on the end surface detection information, and cutting is started. At this time, as shown in FIG. 10 (c), the torch speed is reduced (for example, 70%) in order to obtain a preheating time at the end surface when cutting the steel plate end surface scrap. To 100%. As a result, it is possible to prevent the irregular cutting edge portion of the gas cutting end surface outside the teaching line from being left uncut.

The above-described end face detection method is a technique that can be applied to any case of gas cutting, plasma cutting, and the like.

[0070]

[0071]

[0072]

According to the method for cutting a steel sheet according to the first aspect ,
In the numerically controlled cutting method of automatically cutting a plurality of products from the material by fusing based on the marking line formed on the material surface, when the cutting line between the products to be obtained is T-shaped or cross-shaped, With the products of above, cutting conditions that can be cut stably without flaws can be set according to the plasma cutting and gas cutting characteristics.
High cutting dimensional accuracy and quality can be ensured.

According to a second aspect of the present invention, there is provided a cutting method of a numerical control system for automatically cutting a plurality of products from the material by fusing based on a marking line formed on the surface of the material. The cutting torch is moved from the outside to the inside at a speed lower than the product steady cutting speed based on the detection result, and the steady speed is set in the product cutting area. Automatic cutting from the end surface is possible.

[Brief description of the drawings]

FIG. 1 is an explanatory view illustrating a nesting method for cutting a steel sheet according to the present invention.

FIG. 2 is a plan view showing a schematic configuration of a steel sheet cutting line to which a steel sheet cutting nesting method according to the present invention is applied.

FIG. 3 is an explanatory diagram illustrating automatic setting of a cutting path according to the present invention.

FIG. 4 is an explanatory diagram showing a cutting procedure when cutting is performed by two torches.

FIG. 5 is an explanatory view illustrating a method for cutting a steel sheet according to the present invention.

FIG. 6 is a flowchart showing a steel sheet cutting process according to the present invention.

FIG. 7 is an explanatory diagram showing a cutting order at the time of plasma cutting in the cutting pattern of FIG.

FIG. 8 is a diagram illustrating a cutting start point and a cutoff point of the plasma cutting torch according to the present invention.

FIG. 9 is an explanatory diagram showing a cutting portion and a cutting speed characteristic when performing gas cutting between two products.

FIG. 10 is an explanatory view illustrating a method of cutting an end face of a material with ears.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Conveying table 12 Marking device 14 Plasma / gas cutting combined machine 16 Gas cutting machine 18 Temporary storage place 20 Marking completed material 22 Cutting completed material 24 Transfer table 26 Stamping machine 28 Marking device 30 Ceiling crane 32 Edge detection sensor 34 Torch

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takamitsu Kobayashi 1212 Hitomi, Kimitsu-shi, Chiba Mishima Kosan Co., Ltd. (56) References JP-A-5-123863 (JP, A) JP-A-54-67542 (JP, A) JP-A-60-145272 (JP, A) JP-A-61-293779 ( JP, A) JP-A-5-313724 (JP, A) JP-A-1-95872 (JP, A) JP-A-5-261530 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , (DB name) B23D 36/00 B23K 7/00 B23K 10/00 G05B 19/19

Claims (2)

(57) [Claims] 1. The required product from the material after rolling is gaseous
When cutting by cutting or other work, the steel to be cut
When the board is loaded onto the marking device table,
With respect to the periphery of the healthy part of the steel sheet,
Search until a uniform interval is formed in the length direction.
Marking line that the optimum condition was obtained by the search
Is determined, and the coordinates of the corner of the marking line are determined.
Based on the steel sheet cutting nesting method,
Cutting totilling for cutting out multiple products on a board
Automatically set the cutting line between products to be acquired.
If a T-shape is formed during plasma cutting, adjust the product squareness
After taking out, cut the line corresponding to the T-shaped vertical bar,
Cut the line corresponding to the horizontal bar, or
Cut from one end of the line corresponding to the horizontal bar
Continue cutting the line corresponding to the vertical bar from the intersection, and then
When cutting from the other end of the horizontal bar toward the intersection, and further forming a cross shape when cutting the gas,
Make an angle, cut one line, and then
When cutting the other intersecting line, the other line
Cutting starts from one end of the
H. Slow down and stop for a predetermined time.
An automatic cutting method for a steel sheet. 2. The required product from the material after rolling is gaseous.
When cutting by cutting or other work, the steel to be cut
When the board is loaded onto the marking device table,
With respect to the periphery of the healthy part of the steel sheet,
Search until a uniform interval is formed in the length direction.
Marking line that the optimum condition was obtained by the search
Is determined, and the coordinates of the corner of the marking line are determined.
Based on the steel sheet cutting nesting method,
Cutting totilling for cutting out multiple products on a board
Automatically set the teaching point and refer to the teaching line.
To detect the end face of the material, and based on the detection result,
Cutting torch from side to inside is slower than product steady cutting speed
At a constant speed in the product cutting area.
An automatic cutting method for a steel plate with ears.