JP3072844B2 - Cutting method of work material by band saw machine and band saw machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of cutting a work material by cutting a work material with a band saw machine and a band saw machine thereof.

(Prior art) Conventionally, when cutting a work material using a sawing machine such as a band saw machine, the workability of the work material is not detected, and the operator performs cutting based on his experience and intuition. A manual was created, and cutting conditions for each workpiece were set based on the manual.

(Problems to be Solved by the Invention) By the way, when cutting a work material with a sawing machine such as a band sawing machine, the machinability of each work material is not detected.
Further, the cutting state is not detected during the cutting.
For this reason, there has been a problem that appropriate cutting conditions cannot be quickly set according to each work material, and that appropriate cutting conditions cannot be changed in accordance with a change in cutting during cutting.

That is, even in the same work material, the machinability may be strictly different due to variations in the structure and hardness. Further, the surface condition of the work material includes black scale, turning, and the like, and the turning surface also has a difference in hardness due to work hardening, so that the machinability may be different. Furthermore, the type of work material cannot be determined,
Some new materials have unknown machinability. In such a case, it is necessary to appropriately set the cutting conditions while observing the cutting state while actually cutting.

For this reason, there is a problem that the operator cannot perform a quick cutting operation because a large amount of time and labor is wasted in setting the cutting conditions. Further, for example, when a cut larger than appropriate cutting conditions is made, there is a problem that the cutting tool is damaged.

The object of the present invention is to improve the above-mentioned problems, so that it can be performed under appropriate cutting conditions according to each work material,
It is another object of the present invention to provide a method of cutting a work material using a band saw machine and a band saw machine which are capable of automatically detecting a cutting state during cutting of each work material and changing the cutting conditions to appropriate processing conditions.

(Means for Solving the Problems) The present invention has been made in view of the problems as described above,
According to a first aspect of the present invention, there is provided a cutting method using a band sawing machine that performs cutting of a work material by determining cutting conditions a plurality of times before starting to cut the work material and ending the cutting. When performing cutting on a material, the cutting is performed under cutting conditions corresponding to difficult-to-cut materials or cutting conditions corresponding to the material of the work material. Compare with the filed cutting limit value data and select the replacement of the saw blade or the material when it is out of the cutting limit value, and when it is within the cutting limit value, select the cutting position at the preset cutting position. The cutting force, the cutting time when cutting to a predetermined position, or the cutting position when cutting for a predetermined time is detected, and the detected actual cutting resistance or cutting time or The cutting position is compared with cutting force data based on a preset cutting position stored in a database, cutting time data based on a preset predetermined position, or cutting position data based on a preset cutting time. The appropriate cutting conditions are determined from the cutting conditions, then the cutting is continuously performed under the appropriate cutting conditions, and it is determined whether or not the cutting limit value is reached before reaching the next predetermined cutting position. This is a method of cutting a work material by a band sawing machine which repeats cutting by judging appropriate cutting conditions after judging.

According to a second aspect of the present invention, there is provided a band sawing machine for performing cutting of a work material by determining cutting conditions a plurality of times before starting the work material and ending the cutting. Sometimes a bending detection device for detecting the amount of bending, a cutting resistance detecting means for detecting a cutting force, a database storing bending limit value data, and a cutting resistance at a plurality of cutting positions. A database storing data relating to a plurality of cutting conditions, an actual amount of bending until reaching a predetermined cutting position detected by the bending detection device, and bending limit value data stored in the database The cutting force at a predetermined cutting position detected by the cutting force detecting means and the cutting force stored in the database, as well as determining whether or not the cutting life has elapsed, And arithmetic processing means for determining the proper cutting condition for each predetermined cut position by comparing the relationship data between machining conditions having a configuration including a.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 1, a work table 3 on which a workpiece W such as a bar is placed is provided on a base (not shown) of the horizontal band sawing machine 1. The work table 3 is provided with a vice device 5 for holding and fixing the work material W.

A substantially C-shaped saw blade housing (not shown) is supported on the base via hinge pins 7 so as to be vertically rotatable.

More specifically, the tip of the piston rod 9 is connected to an appropriate position of the saw blade housing, and the work table 3 is provided with a lift cylinder 11. A gear 13 is provided integrally with the hinge pin 7, and a rotary encoder 17 having a gear 15 is provided at an appropriate position so as to mesh with the gear 13.

Therefore, the number of pulses corresponding to the rotation of the saw blade housing is detected by the rotary encoder 17, and the central processing 23 (hereinafter referred to as CP
U. ), The vertical position of the saw blade housing and the rotation angle are accurately detected.

The drive wheel 25 has a drive shaft inside the saw blade housing.
A driven wheel 29 is rotatably provided via a rotating shaft 31 via a shaft 27. The drive shaft 27 is linked to a rotating shaft 37 of a rotating device 35 such as a motor via a connecting member 33 such as a chain or a belt.

An endless band saw blade T is wound around the drive wheel 25 and the driven wheel 29. The saw blade housing is provided with a guide 39 for vertically guiding and supporting the band saw blade T with respect to the workpiece W in the cutting area.

Therefore, in the horizontal band sawing machine 1, by appropriately rotating the rotating device 35, the band saw blade T is driven to travel through the connecting member 33, the driving wheel 25, and the driven wheel 29, thereby cutting the workpiece W. Can be performed.

Further, by supplying pressure oil into the lift cylinder 11 and causing the piston rod 9 to protrude, the saw blade housing can be rotated upward. Then, the oil passage is switched, and the lift cylinder 11 is moved by the weight of the saw blade housing.
The saw blade housing can be turned downward by discharging the pressure oil inside.

By the way, when cutting the work material W, cutting resistance is generated. In view of the fact that this cutting resistance is composed of the main component and the back force and is related to the machinability of the work material W, in this embodiment, the cutting conditions corresponding to the difficult-to-cut material or the material of the work material By detecting the back component and the main component of the cutting resistance under the cutting conditions corresponding to the above, the machinability of the workpiece W can be detected. The cutting conditions corresponding to difficult-to-cut materials are cutting conditions applied to the most difficult-to-cut materials among the work materials. The cutting condition adapted to the material of the work material means the cutting condition applied to the material of each work material.

Referring to FIG. 1, the guide 39 is provided with a load detecting device 41 for detecting the back force.

More specifically, a roller presser 43 that presses the back of the band saw blade T is provided below the guide 39. Roller presser
The roller 43 is provided with a rollable roller 45,
An elevating bar 49 on which a spring 47 is mounted is provided.
The lifting bar 49 is provided with a load sensor 51 that can detect a signal corresponding to the back force of the cutting resistance.

Therefore, when the roller 45 is brought into contact with the band saw blade T, the spring 47 comes into contact with the roller presser 43. And
When cutting the work material W under cutting conditions corresponding to difficult-to-cut materials, or cutting conditions corresponding to the material of the work material, the roller presser 43 resists the urging force of the spring 47 due to the back force. The load sensor 51 detects a signal corresponding to the back force, and the signal is transmitted to the CPU 23 through the interface 53.
Is input to the computer and is appropriately processed to detect and display the back force of the cutting force.

Alternatively, a pressure gauge 55 can be provided on the lift cylinder 11 to detect the force behind the cutting force. That is, the pressure in the lift cylinder 11 changes according to the back force.

Therefore, when cutting the work material W under the cutting conditions corresponding to the difficult-to-cut material, or the cutting conditions corresponding to the material of the work material, the saw blade housing rotates downward and the lift cylinder 11 The pressure changes, a signal corresponding to the back force is detected by the pressure gauge 55, and this signal is input to the CPU 23 via the interface 57, and when appropriately processed, the back force of the cutting resistance is detected and displayed. You.

Next, a rotation sensor 59 is provided on the rotating shaft 37 of the rotating device 35 in order to detect a main component force of the cutting force, which is one of the components of the cutting force. The rotation sensor 59 is provided because the rotation speed of the rotation device 35 changes due to the main component force.

Therefore, when cutting the work material W under the cutting conditions corresponding to the difficult-to-cut material or the cutting conditions corresponding to the material of the work material, the band saw blade T due to the main component force of the cutting resistance, that is, When the rotation speed of the rotating device 35 changes, a signal corresponding to the main component force is detected by the rotation sensor 59, and this signal is input to the CPU 23 via the interface 61 and, when appropriately processed, the main component of the cutting resistance is calculated. The force is detected and displayed.

Alternatively, an ammeter 63 can be provided in the rotating device 35 to measure the main component force of the cutting resistance. This is because the current flowing through the rotating device 35 changes due to the change in the main component force.

Therefore, when cutting the work material W, the current flowing through the rotating device 35 changes due to the main component force of the cutting resistance, and a signal corresponding to the main component force is detected by the ammeter 63. When input to the CPU 23 via 65 and subjected to appropriate arithmetic processing, the main component of the cutting force is detected and displayed.

A clock 67 is connected to the CPU 23.
Thereby, the cutting time when the work material W is cut by the horizontal band sawing machine 1 can be measured.

One of the guides 39 is provided with a bending detecting device 69 such as a magnet sensor.
With 69, the bending amount of the band saw blade T is detected. The detected amount of bending is input to the CPU 23 via the interface 71.

The CPU 23 has an input device 73 such as a keyboard for inputting the material and diameter of the work material W, and an output device such as a CRT for displaying data such as measured back force and main force. 75 is connected.

First, second, third, and fourth databases 77, 79, 81, and 83 are connected to the CPU 23. Further, the CPU 23 is connected to an arithmetic processing means 85.

The first database 77 stores cutting conditions corresponding to difficult-to-cut materials or cutting conditions corresponding to the material of the work material.

In the second database 79, the work material W shown in FIG.
The relationship data between the cutting conditions J1, J2, J3 and the back force, which are set in advance to determine the cutting conditions at the cutting position H1 when cutting is performed, is stored as shown in FIG. Similarly, in the third database 81, relation data between the preset cutting conditions J1, J2, J3 and the back force for discriminating the cutting conditions at the cutting position H2 shown in FIG. It is filed as shown in FIG.

In the fourth database 83, the limit value of the amount of bending when the work material W is selected is stored.

Next, the operation of the cutting of the work material W in the present embodiment will be described with reference to the flowcharts shown in FIG. 2 and FIG.

In FIG. 5, in step S1, a material, a diameter, and the like, which are material names of the work material W, are selected. In step S2, it is determined whether or not the material name has already been registered. If the material name has not been registered, the material name is input by the input device 73 in step S3, and the process proceeds to step S4. If the material name has already been registered in step S2, the process proceeds to step S4.

In step S4, the turning limit value of the work material W is input from the input device 73 and temporarily stored in the fourth database 83.

In step S5, it is determined whether or not to determine the cutting condition of the workpiece W. If it is determined that the cutting condition is not to be determined, manual cutting is performed in step S6. If it is determined that the cutting conditions are to be determined, in step S7, either the cutting condition corresponding to the difficult-to-cut material or the cutting condition corresponding to the material of the work material is selected. Cutting is started with the selected cutting condition as the cutting condition of J1. After starting the cutting process and before reaching the cutting position H1, it is determined in step S8 whether or not there is a bending life.

That is, the actual bending amount detected by the bending detecting device 69 is taken into the arithmetic processing means 85. The arithmetic processing means 85
The turning limit value data stored in the third database 83 is fetched, and the arithmetic processing means 85 compares the actual turning amount with the turning limit value data.

If the actual bending amount is out of the bending limit value,
It is determined that the bending life has been reached, and the process proceeds to step S18, where material replacement, saw blade replacement, or material and saw blade replacement is selected in the submenu 1 in step S18, and the process ends.

If it is determined that the actual turning amount is within the turning limit value and it is not the turning life, the cutting position is determined in step S9.
Judge whether it is the position of H1, that is, the judgment position H1, and judge the position.
If it is not H1, the process returns to before step S8.

If it is determined that the position is the determination position H1, it is determined in step S10 whether cutting is possible. That is, at the discrimination position H1, the back force as the cutting force is detected by the load sensor 51, and the detected actual back force is calculated by the arithmetic processing means 8 connected to the CPU 23.
Incorporated in 5. The relational data between the back force and the cutting condition at the preset H1 position, which is stored in the second database 79 and shown in FIG. Thus, the arithmetic processing means 85 compares the actual back force with the data on the relationship between the preset back force and the cutting conditions.
That is, in the relational data between the backing force and the cutting condition shown in FIG. 3, the current cutting condition is J1, and the actual backing force is 30 kg in the relational data between the cutting condition and the backing force of J1. If the value exceeds the limit, it is determined that cutting is not possible because cutting cannot be performed, and the process proceeds to step S18, where material exchange or saw blade exchange or material and saw blade exchange is selected in the submenu 1, and the processing is terminated.

If the actual back force is 20-30kg back force,
Under the cutting conditions of J1, if the back force is 20 kg or less, for example, 10 to 20 kg, it is determined that the cutting is performed under the J2 cutting conditions, and if the back force is 10 kg or less, the cutting is performed under the J3 cutting conditions.

Therefore, if the detected actual back force is, for example, 15 kg, it is determined that cutting is possible, and step S1 is performed.
Switch the cutting conditions to J2 with 1. In this case, the saw speed under the cutting condition of J2 is set faster than the saw speed under the cutting condition of J1.

Continue the cutting process under the cutting conditions of J2, and determine the discrimination position H2
In the meantime, the turning life is determined in step S12 in the same manner as in step S8. If it is determined that there is a bending life, the process proceeds to step S18, and the same processing as described above is performed. If it is determined that it is not the bending life, it is determined in step S13 whether or not the cutting position H2, that is, the position of the determination position H2.
Return to before 2.

If it is determined that the position is the determination position H2, it is determined in step S14 whether cutting is possible. That is, at the discrimination position H2, the back force as the cutting resistance is detected by the load sensor 51, and the detected actual back force is calculated by the arithmetic processing means 8 connected to the CPU 23.
Incorporated in 5. The relation data between the back force and the cutting condition at the preset H2 position shown in FIG. 4 and stored in the third database 81 is taken into the arithmetic processing means 85. Thus, the arithmetic processing means 85 compares the actual back force with the data on the relationship between the preset back force and the cutting conditions. That is, in the relational data between the back force and the cutting condition shown in FIG. 4, the current cutting condition is J2.
The actual back force is 65 based on the relationship between cutting conditions and back force.
If it exceeds kg, it is determined that cutting cannot be performed even under the cutting conditions of J1, and the process proceeds to step S18, where the same processing as described above is performed.

If the actual back force is in the range of 35-65kg, the current J2
It is judged that cutting cannot be performed under the cutting conditions of, but cutting can be performed under the cutting conditions of J1. Also, the actual back force is 18-35
If it is within the range of kg, it is determined that cutting can be performed under the current J2 cutting conditions. Further, if the actual back force is less than 18 kg, it is determined that cutting can be performed under the cutting conditions of J3.

Now, assuming that the actual back force is, for example, 10 kg, it is determined that cutting is possible, and in step 15, the cutting conditions are switched to J3. In this case, the saw speed under the cutting condition of J3 is set faster than the saw speed under the cutting condition of J2.

Continue cutting with J3 cutting conditions, step S1
At 6, it is determined whether one cut has been completed. If it is determined that one cut has not been completed, the life of the turning is determined in step S17. If it is determined that the turning life has not been reached, the process returns to the step before step S16.

If it is determined that the bending life has been reached, step S1
Proceeding to 8, the user selects material replacement or saw blade replacement, or material and saw blade replacement from the submenu 1, and ends.

If it is determined in step S16 that one cut has been completed, it is determined in step S19 whether cutting is possible. If it is determined that cutting is not possible, the process proceeds to step S18, and the same processing as described above is performed. When it is determined that cutting is possible,
In the submenu 2 of step S20, one of the discrimination under the cutting condition of J1, manual cutting, material exchange, saw blade exchange, exchange of material and saw blade, or JOB END is selected, and the process is terminated.

Thus, when performing the cutting work on the work material W, the cutting work is performed under the cutting conditions corresponding to the difficult-to-cut material or the cutting conditions corresponding to the material of the work material W, and the cutting resistance at a preset cutting position is set. For example, the back force is detected, and the detected actual cutting force such as the back force is compared with the cutting force data based on a preset cutting position stored in the second database 79, such as the back force data. Then, an appropriate cutting condition can be determined based on the comparison result.

Next, the cutting process is continuously performed under the appropriate cutting conditions, and the actual cutting resistance at an appropriate number of cutting positions, for example, the back force is detected. It is possible to determine an appropriate cutting condition based on a result of comparing the detected actual cutting force, for example, the back force, with the cutting force data, for example, the back force data, stored in the third database 81. it can. Thus, it is possible to automatically detect and determine the cutting state during the cutting of each workpiece W, and change the cutting conditions to appropriate cutting conditions in accordance with the cutting state.

In the cutting method according to the present embodiment, the main force can be detected as the cutting force instead of the back force, and the cutting time when cutting to a predetermined position instead of the cutting force can be performed. Alternatively, it is also possible to detect and respond to the cutting position when cutting is performed for a predetermined time.

[Effects of the Invention] As can be understood from the above description of the embodiments, in the present invention, the cutting conditions are determined a plurality of times from the start of cutting of the work material to the end of cutting. It is intended to cut the workpiece, and detects the amount of bending until reaching a predetermined cutting position by a bending detection device, and the detected bending amount and the bending limit value data stored in the database. When the deviation is out of the cutting limit value, a saw blade or material exchange is selected, and when it is within the cutting limit value, the cutting force or the cutting time or the cutting position is detected and stored in the database. It is to determine the appropriate cutting conditions for each predetermined cutting position by comparing with each data, and when determining the cutting conditions, the cutting limit value is determined each time it is determined. Always appropriate Cutting under cutting conditions will be performed, cutting will be suppressed without causing overload, and when cutting occurs, it is necessary to determine cutting conditions such as replacing the saw blade There is no such thing, and waste can be eliminated.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the outline of a horizontal band saw machine embodying the present invention and a control device. FIG. 2 is an explanatory view for explaining a method of cutting a work material by a band saw machine, and FIGS. 3 and 4 show the relationship between the back force and the cutting conditions stored in the second and third databases. FIG. 4 is a diagram illustrating an example of data. FIG. 5 is a flowchart showing an example of the operation in the cutting method of the present invention. 17 ... Rotary encoder, 21 ... Control device, 23 ...
CPU 51 Load sensor 51 Pressure gauge 59 Rotation sensor
63 ... ammeter 67 ... clock, 77 ... first database, 79 ... second database 81 ... third database, 83 ... arithmetic processing means

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Takashi Furukaku 165-2, Nishiyokota-cho, Kasai-shi, Hyogo (56) References JP-A-61-274844 (JP, A) JP-A-61-279422 (JP, A) JP-A-49-13779 (JP, A) JP-A-60-127848 (JP, U) JP-B-58-24221 (JP, B2) JP-B-58-22290 (JP, B2) 52029 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) B23D 55/00 B23Q 15/12

Claims (2)

(57) [Claims] In a cutting method using a band saw machine for cutting a workpiece by determining a plurality of cutting conditions a plurality of times between the start of the cutting of the workpiece and the end of the cutting, the cutting of the workpiece is performed. When performing machining, cutting is performed under cutting conditions corresponding to difficult-to-cut materials or cutting conditions corresponding to the material of the work material, and the actual amount of bending detected until reaching the predetermined cutting position and filed in the database When it is out of the cutting limit value by comparing with the cutting limit value data, select the replacement of the saw blade or the material, and when it is within the cutting limit value, the cutting resistance at a preset cutting position, Or, a cutting time when cutting to a predetermined position, or a cutting position when cutting for a predetermined time is detected, and the detected actual cutting resistance or cutting time or cutting position is detected. And cutting force data based on a preset cutting position filed in a database or cutting time data based on a preset predetermined position or cutting position data based on a preset cutting time, and a plurality of cutting operations are performed. Determine the appropriate cutting conditions from the conditions, then continue cutting under the appropriate cutting conditions, and determine whether or not the cutting limit is reached before reaching the next predetermined cutting position. A method for cutting a work material using a band sawing machine, wherein a cutting condition is determined and then cutting is repeated. 2. A band sawing machine for cutting a work material by determining a cutting condition a plurality of times between the start of the work material cutting and the end of the cutting operation. A bend detecting device for detecting an amount, a cutting resistance detecting means for detecting a cutting force, a database containing a file of cutting limit value data, a cutting force at a plurality of cutting positions and a plurality of cuttings A database in which data relating to conditions are filed, and the actual amount of bending until reaching a predetermined cutting position detected by the bending detection device is compared with the bending limit value data stored in the database. The cutting force at a predetermined cutting position detected by the cutting force detecting means, the cutting force stored in the database, and a plurality of cutting times are determined. By comparing the relation data between the matter band saw machine, characterized in that and a processing means for determining the proper cutting conditions for each predetermined cut position.