JPS6294215A - Method and device for cutting material - Google Patents

Abstract

PURPOSE:To cut a material to be cut, having a desired weight, with an improved working efficiency, by a method wherein the outer size or the width of the material to be cut is measured, a feed length, which provides the material to be cut having a set weight, is automatically calculated, and the material is cut according to the feed length. CONSTITUTION:A long material W is fed by a conveyor 29, and the outer size of the material is measured by an encoder 35 for measuring an outer size. The material nipped by a vice device 31 is fed by a specified size through driving of a feed device 33 by a size, set by a control device 19, with the aid of an encoder 37 for measuring the feed length of a set material. After said feed, the material is securely nipped by a device 11, and the material is cut by a band saw blade 2 to provide the material cut to a specified length having weight equal to a set weight.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method and apparatus for cutting a material to size.

[Technical deficiencies in the invention and its problems] Generally, the following method is used to determine the cutting length of a material with a saw.

(1) A method in which dimensions are measured using a scale and positioning is performed manually.

(2) Automatic positioning method using a fixed size stopper with a counter.

(3) Programming automatic positioning method using numerical control.

Incidentally, the cross-sectional shape of a material is generally referred to as its nominal dimension, but the actual dimension naturally has an error with respect to the nominal dimension.

The Japanese Industrial Standards (JIS) stipulates a dimensional tolerance of ±1.8% for steel bars with a diameter of 28 mm or more. On the other hand, however, forging involves the process of putting the material into a mold and compressing it, and it is important to match the space volume of the mold with the volume of the material. This is because if they do not match, the mold may be damaged. Therefore, each piece of steel material cut with a saw is fft ffi, and if the error exceeds an allowable value, it is necessary to make corrections. Therefore, if it is necessary to make the volume of the material exactly match the spatial volume of the mold, the worker should actually measure the outside diameter of the material with a caliper or other measuring device during the saw cutting process, and make sure that the volume reaches the target volume. The method used was to determine the cutting length and set that length as the feed length in the control device.

However, if such a cutting method is used, there is a problem in that the worker must measure and weigh the cross-sectional shape and size of each material, resulting in poor work efficiency.

[Object of the Invention] This invention was made in view of such conventional problems, and it is possible to obtain a cut material of a set weight by measuring the outer diameter or width of the actual material on the cutting device side. By automatically reeding the feed length and cutting the material using that feed length, even if the outer diameter dimension has an error from the nominal dimension, the desired weight can be achieved by adjusting the cutting length. It is an object of the present invention to provide a method for cutting a material and an apparatus therefor by which a cut material can be obtained.

[Structure of the Invention] This invention calculates and sets the weight of the material to be cut by inputting the set values of the specified outer diameter or width of the material and the cutting length, and calculates the outer diameter or width of the material brought in. A method for cutting a material, characterized in that a feed length is measured to achieve the set weight, and the material is fed to that length and cut, and the method includes a vise device, a sizing material feed device, and a cutting blade. The cutting device includes a means for storing settings for the outer diameter or width of the material, a feed length, and a weight of the material to be cut, a means for actually measuring the outer diameter or width of the material, a set weight of the setting storage means, and an outer diameter of the actual measuring means. Alternatively, the gist of the present invention is a cutting device comprising calculation means for calculating the feed length of the material from the actual measurement value of the width and controlling the sizing material feeding device.

[Embodiment of the Invention] As shown in FIGS. 1 and 2, a horizontal bandsaw machine 1 is composed of a box-shaped base 3 and a cutting head 5, and the cutting head 5 is attached to the base 3 through a hinge bin 7. It is supported so that it can swing vertically. Base 3 above
There is a work table 9 on which cutting and riveting material W is placed.
is provided. This work table 9 has materials W
A vice device 11 comprising a fixed vice jaw 11 which can be freely clamped and fixed and a movable vice jaw 11m is mounted. The cutting head 5 has a housing part 13
．． 15, each housing part 13.15 is integrally connected by a beam member 17, on which a control device 19 is provided.

Inside the housing portions 13 and 15 of the J-Twig head 5 are drive wheels 21 and 21, respectively. A driven wheel 23 is provided, and a bandsaw blade 25 is inserted between these two wheels 21 and 23.
But the uto is being turned. Further, the cutting head 5 can be vertically rotated about the hinge bin 7 with respect to the base 3 by means of a cylinder device 27.

A conveyor 29 for carrying in the H material W is connected to the base 3.
is connected. Further, the base 3 is provided with a feed side vice device 31 consisting of a feed side fixed vice jaw 31f and a feed side movable vice jaw 31m, and the band saw blade 25 is cut by a feeding device 33 provided on the conveyor 29. This allows the material W to be fed to each section in desired dimensions.

In this feed-side vice device 31, the feed-side movable vice jaw 31m is provided with an encoder 35 for measuring the outer diameter of the material W, and the feed-side fixed vice jaw 31f is provided with an encoder 35 for measuring the material feed distance. encoder 3
7 is provided.

In the band saw machine 1 having the above configuration, a long material W is carried onto the conveyor 29, and its front end is first aligned with the cutting line of the band saw blade 25 by the action of the feed-side vice device 31 and the feed device 33.

Thereafter, in the feed-side vice device 31, the movable vice jaws 31m are driven to clamp and fix the material W against the fixed pipe thread E-31f, and the feed device 33 is driven by the feed length set by the control device 19. , the material W is fed to a fixed size. After this, the vice device 11 is also driven,
The material W is clamped and fixed at two locations, front and back, to stabilize it, and in this state, the cutting head 5 is lowered by the drive of the cylinder device 27, and the band saw blade 25 cuts the material W.

When one cutting is completed, the cut material is carried out from the saw band machine 1 by a carrying out device (not shown).

Next, while the vice device 11 is holding the front end of the material W, the movable vice jaws 3 of the feeding side vice device 31
1111 is moved back to release the clamping of the material W, the feeding device 33 is retreated to the original position, and at that position, the feeding side vice device 31 is driven again to clamp and fix the material W.

At the same time, on the vice device 11 side, the movable fixed vice jaw 1
Move back 1m to release the material. In this state, the feed device M 33 is driven again by the size set by the control device 19, and the material W is again fed to a fixed size. After sending the material,
The vice device 11 is operated again to clamp and fix the front end of the material W again. Then, the band saw blade 25 cuts the material W again.

By repeating the above operations, the long material W is cut to size.

An embodiment of a method and an apparatus for cutting a material to a fixed size while correcting the weight of the cut material to strictly match the set weight using the band saw machine 1 will be described.

As shown in FIGS. 3 and 4, the nominal outer diameter or width dO1 and cutting length No. of the material to be used are input into the storage device 41 by an input device 39 such as an MDI, and from these inputs, the length of the material to be cut is determined. The set weight Wo is calculated and stored according to the following formula - Step 101゜''A10=(4/π)Xdo2Xu.

Subsequently, the material W is transported by the conveyor 29 as a material carrying device.
is carried in, and the actual outer diameter dimension d1 is measured by the encoder 35 of the movable vice jaw 31+ of the feeding side vice device 31. Here, the actual diameter of this outer diameter is the nominal outer diameter dimension d
The comparator 43 compares O to see if it is within the allowable value, and if it is not within the error range, the material is determined to be a mistake and is discharged by the discharge device 45 - Steps 104 and 105; however, the actual dimension d1 is not the nominal dimension dO. If it is within the allowable error, the actual feed quality is calculated by the arithmetic unit 47 in step 106. This setting of the feed quality is based on the following equation.

For the nominal outer diameter do = 100 mm, the product type seedling WO with the length o = 1001 is Wo = (π/4) x 102 x 10 x 7.85 x 10
'=6.17k.

The actual dimensions within a dimensional tolerance of ±1.8% with respect to φ100 are in the range of φ98.2-φ101.8. In order to correct the minimum and maximum dimensions to the same weight, it is necessary to set the length to -103.8 mm for φ98.2 and -96.9 ml for length φ101.8. Therefore, the actual feed length 1 is determined by the following formula.

Love + =Wo / (π/4)xd l 2x7,85
10-3 Here, 7.85X10-3: specific gravity of steel material Based on the feeding material dimensions thus calculated by the calculation device 47, the material feeding device 33 feeds the material W by one length, and the cutting device 1 of the material W by the cutting head 5 as
-107.108° After the cut material is thus cut to a length of 1 which gives the set weight, the cut material is carried out by the carry-out device 49 and passed through the chip removal device 51. The cutting length is then cleaned and then the cutting length is measured by the cutting material length measuring device @53 - Steps 109-111゜In this length measurement, the material feeding device 33 measures the material W by measuring the actual set size. This is done to determine whether the actual length of the cut material is within the permissible range of the feed length 1, and if it exceeds the permissible range. If so, the cut material is discharged as defective material - Step 11
2,113° In this judgment step, if the actual length 2 of the cut material is within the allowable range of the feed length 1, the weight of the cut material is measured by the weighing device 55, and the weight value is W
1 is printed out. Based on the weight W + of the cut material weighed here, the actual outer diameter dimension d1 of the material W is corrected by the following formula.

d 2 = (W+ X4/7rXu+ x7,85X
1 0-3> ” 12 = WoX4/πxd2 x7.35X10' In this way, the actual outer diameter dimension d2.feed length A2 is corrected, and this correction value is used as the new actual dimension as the outer diameter dimension d1 in step 106. After this correction calculation, the cut material is sorted by the device 57, and the above flow is repeated until the required number of cut material is obtained.Step 117゜118゜In this way, measure the outer diameter of the material that will actually be used, calculate the material feed length to match the actual size and obtain the cut material of the target weight, and calculate the feed length. By cutting the material according to the method, it is possible to obtain a cut material whose weight exactly corresponds to the set weight.

In addition, in the case of the above embodiment, there is a step in which a small amount of material to be cut is measured, and if it does not match the target weight, the actual outer diameter is corrected and the feed length is also corrected. Steps can be added as needed.
If the material used is homogeneous and there is almost no eccentricity, the weighing and correction calculation steps of steps 114-116 can be omitted, and step 1
It is also possible to proceed directly from step 12 to step 117.

[Effect of the invention] This invention measures the actual dimensions with respect to the nominal dimensions, determines the material feed length based on the actual dimensions so that the weight of the cut material matches the set weight, and Since the material is cut according to the cutting angle, even if the material used has a tolerance with respect to the nominal size, it can be cut exactly to the desired weight. Therefore, even when cutting materials with strictly uniform weights are required, such as forging, it is possible to automatically obtain a large number of cut materials.
It has the advantage of improving cutting efficiency.

[Brief explanation of drawings]

FIG. 1 is a front view of a band saw machine according to an embodiment of the invention, FIG. 2 is a plan view of the band saw machine, FIG. 3 is a system block diagram of an embodiment of the invention, and FIG. 3 is a flowchart illustrating an example operation. 1...Band saw machine 3...Base 5...
・Cutting head 25...Band saw blade 29...Carrying conveyor 31...Feeding side vice device 33...Feeding device 3
5... Encoder for measuring outer diameter 37... Encoder for setting feed length 39... Entry j device 41... Storage device 43... Comparison device 45... Unloading device 4
7... Arithmetic device 49... Unloading device 53
...Length measuring device 55...51 Quantity printer device 57... Sorting is done by device agent Yasuo Miyoshi, patent attorney. -1・,,:Pa□

Claims (4)

[Claims] (1) Calculate and set the weight of the material to be cut by inputting the specified outer diameter or width of the material and the cutting length, and then measure the outer diameter or width of the material brought in and calculate the set weight. A material cutting method characterized by calculating the feed length to give the desired length and cutting the material by feeding the material to that length. (2) Measure the weight of the material to be cut, correct the actual measured value of the outer diameter or width of the material by calculation with the set feed length, and adjust the set weight value based on this corrected outer diameter or width. 2. The material cutting method according to claim 1, wherein the feed length is corrected and the material is then fed and cut at this corrected feed length. (3) A cutting device equipped with a vise device, a sizing material feeding device, and a cutting blade, which includes a means for storing settings for the outer diameter or width of the material, feed length, and weight of the material to be cut, and a means for storing the outer diameter or width of the material. A cutting device comprising an actual measuring means and a calculating means for controlling a sizing material feeding device by calculating the feed length of the material from the set weight of the setting storage means and the actual measured value of the outer diameter or width of the actual measuring means. . (4) The calculation means includes a correction calculation means, which corrects the outer diameter or width of the material from the actual measurement value from the weight measuring means of the cut material and the actual feed length of the material, and uses the corrected outer diameter or width. 4. The cutting device according to claim 3, wherein the feed length of the material is corrected based on the corrected feed length, and the sizing material feeding device is controlled based on the corrected feed length.