JPH10166216A - Cutting method for polygonal plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily perform a cutting into a polygonal plate by determining the specified part of a material plate for a center, fixing this center by being matched with the revolution, center of a main shaft, performing indexing revolution and stoppage for the main shaft and cutting the material plate by reciprocating a round edge. SOLUTION: A material plate A is placed on the upper end of a main shaft 15 having a vertical axis line, the upper surface of the material plate A is pressed by a pressing bar 43 and is clamped, a round edge is reciprocated in a state that the round edge is revolved and the material plate A is cut. The specified part of the material plate A is determined for a center, this center is fixed by being matched with the revolution center of the main shaft 15, an indexing revolution and stoppage is performed for the main shaft 15, the round edge is reciprocated and the material plate A is cut. The material plate A is cut into an arbitrary polygonal plate. An indexing angle and a distance from the reciprocating route of the round edge to the revolution center of the main shaft 15 are preliminarily determined from the shape of a completed plate material and are stored as numerical control data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a method for cutting a polygonal plate.

[0002]

2. Description of the Related Art A conventional method for cutting various polygonal plates from a material plate is to scribe the shape of the material plate in accordance with a desired plate material, clamp the scribed material plate, and cut a cutter on the scribe line. , And cut the clamp, remove the clamp, change the posture of the blank, clamp again, cut, and repeat the same operation.

[0003]

However, the cutting operation requires a great deal of labor and time. An object of the present invention is to solve the above problems and to provide a method for easily and easily cutting a polygonal plate.

[0004]

Means for Solving the Problems To solve the above problems, the configuration of the present invention is as follows. That is, a material plate is placed on the upper end of a main shaft having a vertical axis, the upper surface of the material plate is pressed and clamped by a holding rod, and the material plate is cut by rotating and reciprocating a round blade. Using the cutting device as described above, a specific portion of the material plate is determined as the center O, this center is fixed to coincide with the rotation center of the main shaft, the main shaft is indexed and stopped, and the round blade reciprocates. Then, the indexing angle of the spindle and the distance from the reciprocating path of the round blade to the center of rotation of the spindle are determined in advance from the shape of the completed plate material and stored as numerical control data.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on an embodiment shown in the drawings. First, a cutting apparatus used in the method of the present invention will be described. 1 is a front view, FIG. 2 is a plan view, and FIG. 3 is a right side view. In FIG. 1, the directions are defined as forward in the direction perpendicular to the plane of the paper, backward in the lower side, left on the left, right and up and down on the right.

In FIG. 1 to FIG.
Is such that the rectangular plate material A is supported on the upper end of a rotatable main shaft having a vertical axis in a state of being spread in a horizontal plane. That is, the rectangular plate is assembled three-dimensionally on the upper surface of the rectangular base plate 11 to form the frame 12,
Left wall 12a, right wall 12b, intermediate wall 1 standing upright on the base plate
2c and a horizontal upper wall 12d. Frame upper wall 1
A vertical support cylinder 13 penetrates and is fixed at a position forward of the 2d intermediate wall. A spindle 15 having a vertical axis on this support cylinder
Is rotatably supported by a bearing 14, and a receiving seat 16 formed of a disk in a plan view is fixed to an upper end thereof.

A spindle drive unit 20 having a spindle motor for rotating the spindle 15 is configured as follows. That is, the intermediate shaft 21 and the main shaft motor 22 are mounted on the rear surface of the frame intermediate wall 12c in this order in parallel with the main shaft 15 and at an interval on the right side. Then, the lower portion of the main shaft 15 and the intermediate shaft 2
A belt transmission means 23 is connected to the upper portion of the motor 1 and a cone-type continuously variable transmission 24 is provided between the lower portion of the intermediate shaft 21 and the motor shaft facing downward.

A spindle indexing and rotating portion 30 for intermittently rotating the spindle 15 is also provided on the rear surface of the frame intermediate wall 12c. That is, the index shaft 32 is concentrically connected to the lower end of the main shaft 15, and the clutch 35 and the belt transmission means 33
The indexing motor 34 is attached to the rear side surface of the frame intermediate wall 12c via the. 31a is a disk brake fixed to the lower part of the main shaft, and 31b is a hydraulically operated brake shoe provided on the frame intermediate wall. An encoder 36 is attached to the lower end of the index shaft and outputs a signal of the rotation angle.

In FIG. 1 and FIG. 14, a work clamp 40 for pressing a central portion of the material A is concentric above the main shaft 15 and rotates at the lower end of a presser bar having a vertical axis and moving up and down by power. The cap is fitted. That is, a column 41 is erected on the right half of the frame upper wall 12d, and a guide cylinder 42 is provided on the left side thereof, and a pressing rod 43 having a vertical axis is guided slidably up and down. A rotation cap 45 is rotatably fitted to a lower end of the rotation cap 45 via a bearing 46. In this rotary cap, a holding pad 45b is fixed to the bottom surface of a bottomed cylindrical body 45a. The upper end of the holding rod 43 is the piston cylinder mechanism 4
4 is connected, and the piston cylinder mechanism 44 is connected to the column 41
It is fixed to the left side of the.

In FIGS. 2, 3, 6, and 10, the material A
A side table 55 that is provided behind the workpiece mounting unit 10 and supports a lower surface of the corner of the material A mounted on the upper end of the main shaft 15; The material is sandwiched between the pad 59 and the pad 59 which moves upward and downward by power. That is, a rectangular parallelepiped stand 51 is provided behind the work placing part 10, and a first carriage 52 having a rectangular shape in a plan view is slidably mounted in the front-rear direction via a first rail 53 thereon. . The reciprocating means 58 for moving the first carriage 52 back and forth has a feed screw rod 58b screwed into a female screw member 58a fixed to the lower surface of the first carriage 52, and a feed motor 58c connected to the rear end.

A plurality of columns 54 are erected on the upper surfaces of the front end and the rear end of the first carriage with an interval in the left-right direction, and a rectangular side table 55 in a plan view is placed and fixed over the upper ends thereof. Is done. A portion of the side table 55 close to the main shaft 15 is divided into a rectangular shape to form a movable portion 55a, and hinges 55c at left and right ends of the trailing edge are swingable up and down about the trailing edge. The three columns 54a that support the front part of the movable part 55a are erected from an elevating table 80 (comprising a base plate 81 and an elevating piston cylinder 82). Above the left and right sides of the side table movable part, a piston cylinder mechanism 56 having an axis parallel to those sides is installed, and the rear end of the piston rod is pin-connected near the rear end of the side table. The front end of the cylinder mechanism is pin-connected to the front end of the side table. Thereby, the front end of the side table movable portion 55a can move up and down.

In the pad elevating section 57, a cylinder end of a piston cylinder mechanism 57b extending in the left-right direction and elongated in a vertical plane is pin-connected to the upper end of the front right end column, and the tip of the piston rod is It is pin-connected to a corner of the L-shaped link 57a. The link is L-shaped in a vertical plane extending in the left-right direction, and its long piece extends near the main axis of the side table and the rectangular piece is pin-connected to the right half near the trailing edge of the side table. And L-shaped link 5
A pad 57c is pin-connected to the left end of 7a. As a result, the corner of the material A is sandwiched between the side table 55 and the pad 57c.

In FIGS. 7, 8, and 9, a workpiece cutting section 60 for cutting the material is provided with a second rotary table 61 which can reciprocate right and left on the first rotary table 52. The blade 65 is provided. That is, on the inside of the first carriage 52 surrounded by the pillar 54 via the second rail 62,
A second carriage 61 is slidably mounted to the left and right by a second carriage 68. The second reciprocating means 68 has a feed screw rod 68b screwed into a female screw member 68a fixed to the lower surface of the second reciprocating carriage 61, and one end of which is connected to a cutting reciprocating motor 68c. On the second carriage, a tool shaft 64 is provided in the right half via a bracket 63 so as to extend in the front-rear direction, a round blade 65 is fixed at the rear end, and a belt transmission is provided at the front end of the tool shaft. It is connected to the right cutting motor 67 via the section 66.

The operation of the cutting device will now be described. The movable portion 55a of the side table 55 is lowered, the front portion thereof is supported by the column 54a, and the feed motor 58c is driven by driving the feed motor 58c while keeping the upper surface of the main bearing seat 16 substantially in the same horizontal plane. The carriage 52 is fixed at a position corresponding to the size of the workpiece. Next, the rectangular material plate A that has been cut in advance is placed substantially centered on the receiving seat 16 at the upper end of the main shaft. Next, the work clamp part 40 is operated, the piston cylinder mechanism 44 is operated to lower the holding rod 43, and the lower end of the rotating cap 45 presses the upper surface of the center of the material A.

Next, the pad 57c is lowered by operating the piston cylinder mechanism 57b of the side clamp section 50, and one corner of the material is clamped and fixed between the side table 55. Next, the main shaft 15 is fixed by applying the brake 31, the cutting motor 67 is driven, and the second carriage 61 is moved leftward by the reciprocating means 68 with the round blade 65 rotated. This cuts one corner of the material. After the cutting, the second carriage 61 is returned to the original state.

Next, the pad 57c is raised by operating the piston cylinder mechanism 57b of the side clamp unit 50, and the side table lifting / lowering means 56 is raised to raise the side table movable unit 55a obliquely. Then, the cut corners slide down on the side table 55 and are removed. The elevating table 81 is slightly lowered, and the column 54a is slightly lowered.

Next, after the brake 31 is released and the main shaft 15 is released, the main shaft indexing rotation unit 30 operates.
That is, the clutch 35 is engaged, the index shaft 32 and the index motor 34 are connected, and the index motor 34 rotates,
The indexing shaft 32 rotates 90 degrees and stops at the signal of the encoder 36. During the indexing rotation, the shafts of the intermediate shaft 21 and the spindle motor 22 idle. In this state, the same operation as described above is performed again, and the second corner is cut off. In the same manner, the material is in an arbitrary polygonal state.

Here, in FIGS. 3 and 4, a pulse motor is used as the indexing motor 34. The reciprocating means 58 of the first carriage 52 includes a feed screw rod 58b.
Is connected to a feed pulse motor 58c at the end, and an encoder 58d is provided at the other end. Furthermore, the second carriage 6
A limit switch (not shown) that outputs a signal to stop at these positions is provided at the forward / backward limit position of one.

Then, using the cutting device, the blank A is placed on the upper end of the main shaft 15 having a vertical axis, and the upper surface of the blank is pressed and clamped by the press bar 43, and the round blade 65 is clamped. The material plate is cut back by reciprocating while rotating. Also, a specific portion of the material plate A is centered O
The center is made coincident with the rotation center of the main shaft 15 and fixed, the main shaft 15 is indexed to stop rotation, and the round blade 65 is reciprocated for cutting.

Here, the indexing angle of the spindle and the distance from the reciprocating path (cutting path) of the round blade to the center of rotation of the spindle are determined in advance from the shape of the completed plate material, and are numerically controlled (sequence control) data. It is memorized. For example, a rectangular blank A shown in FIG. 17, when the one long side leaving (one long side) (6 sides), cutting the completed plate A ₀ hexagons by cutting the other side, the following become that way. The center O of one of the long sides of the material plate A is set as the center O, and the center O is made to coincide with the center of the main shaft 15 of the processing apparatus, and
On the other hand, the long side is fixed perpendicular to the cutting path, and the cutting operation is performed. Therefore, the position of the angle and blade indexing (index) defines a center O from the finished plate A _0, scale, by using a ruler, as follows. The position of the blade from the first side-the angle O-the center O is 75 mm. The second side—the angle is the angle between the extension of the first side and the second side = 6
5.77, and the position of the blade is 58.13, which is the length of the perpendicular from the center O to the second side. The third side—the angle is 90 degrees, and the blade position is 75. The fourth side—the angle is 135 ° which is the angle between the extension of the first side and the fourth extension, and the position of the blade is 91.92, the length of the perpendicular from the center O to the fourth side. The fifth side—the angle is 180 degrees and the blade position is 75.

An embodiment of the method according to the present invention will be described below with reference to the block diagram of FIG. 15 and the flowchart of the microcomputer of FIG. First, the data is created (step S1), and the data is transferred to the microcomputer (step S2). Next, the center O of the raw material plate is made to coincide with the rotation center of the main shaft (step S3), the holding rod 43 serving as a center clamp is lowered to close (step S4), and the start button is pressed (step S5). By the feedback of the index encoder 36 in response to the command of the index angle O,
The indexing angle O of the indexing shaft 32 is confirmed and indexed and positioned (step S6).

Next, in response to a command for the blade position of 75 mm, the feed pulse motor 58c rotates, and the amount thereof is
The feedback is made in step d, and the first carriage 52 moves to determine the cutting position of the round blade 65 (step S7). Also, it is confirmed by the limit switch whether the second carriage 61 is at the retreat limit position (step S8), and then the pad 57c of the side clamp is closed (step S9). Next, the round blade 65 rotates (Step S10), advances (Step S11), cuts the first side of the blank, and stops by operating the limit switch at the forward limit position (Step S1).
2).

Next, the side clamp is released (step S).
13), the side table movable portion 55a serving as an ejector is opened and scrap is eliminated (step S14), and then the ejector is closed (step S15). Next, the round blade retreats (Step S16), and the second carriage 61 stops at the retreat position by the operation of the limit switch. Next, it is determined whether or not the data is END (step S17).
If O, the process returns to step S5 and step S6 again, and the cutting of the second side and thereafter is performed in the same manner as described above, and the data EN
If D is YES, the process is completed (step S18).

In the following, embodiments for cutting plates of various other shapes will be described. The indexing angle and the blade position of the shape shown in FIG. 18, that is, the rectangular material plate A in which the opposing corners are cut off, are determined in advance as follows. It defines the center O to the inner shape of the finished plate A _0, whereas the short side is aligned with the cutting path is fixed. 1st side-angle O-distance from the center O so that the cutting tool position is not cut. Second side-angle 68.2 degrees-blade position 68.2 from center O
mm. 3rd side-no data because there is no cutting. Fourth side-no data because it is not cut. Fifth side-angle 225 degrees-blade position 95.4 from center O
6 degrees.

FIG. 19 shows a case where a polygonal plate is cut from a square material plate A. The indexing angle and the position of the blade are determined in advance as follows. Defined center O to the center of the shape of the finished plate A ₀ causes fixed to one side of the square to match the blade reciprocating path. 1st side-angle O-blade position 125 mm from center O 2nd side-angle is the angle 63 between the extension of the first side and the second side.
43 degrees-Tool position 100.62 mm from center O Third side-Angle = angle between extension of first side and third side = 1
16.57 degrees-The position of the blade is 122.98 mm as the length of the perpendicular from the center O to the third side. The fourth side-the angle between the extension of the first side and the fourth side is 180.
Degree-The tool position is 12 perpendicular to the length from the center O to the fourth side.
5mm 5th side-Angle is the angle formed by the extension of the 1st side and 5th side 251.57 degrees-Blade position is 110.68mm, the length of the perpendicular from center O to 5th side 6th side -The angle is the angle 28 between the extension of the first side and the sixth side
3.04 degrees-The tool position is 127.33 mm as the length of the perpendicular from the center O to the sixth side.

FIG. 20 shows a case where a regular polygonal plate (regular decagon) is cut from the square material plate A. The indexing angle and the position of the blade are determined in advance as follows. Completed plates defining a center O to the center of the shape of A _0, is fixed by the side of the square to match the blade reciprocating path. 1st side-angle O-blade position 130 mm from center O 2nd side-angle = angle between extension of first side and second side = 3
6 degrees-tool position 130 mm from center O 3rd side-angle = angle between extension of 2nd side and 3rd side = 7
2nd time The tool position is 130m in the length of the perpendicular from the center O to the third side
m In the same manner, cutting is repeated at a blade position of 130 mm every 36 degrees.

FIG. 21 shows a case where a polygon (approximately a pentagon) leaving the periphery of a circle is cut from the round plate material plate A. A center O is defined at the center of the disk. 1st side-angle O-tool position 172.73m from center O
m Second side-72 degrees-Tool position 172.7 from center O
3mm 3rd side-The angle is the angle between the extension of the 1st side and the 3rd side = 1
The tool position is 44.degree., The tool position is 172.73 mm in the length of a perpendicular from the center O to the third side, the fourth side-angle is 216 degrees, and the tool position is 172.73 mm. The fifth side-angle is the extension of the first side. The angle formed by the line and the extension of the fifth side is 286 degrees, and the position of the tool is 172.73 mm in the length of the perpendicular from the center O to the fifth side.

FIG. 22 shows a case where many identically shaped plate members A ₀ are cut out of a rectangular plate A along cutting lines parallel or inclined to the short sides. A center O is determined at the center of one of the short sides of the blank, and the index angle and the position of the blade are determined therefrom. One of the long sides of the material plate is fixed parallel to the reciprocating path of the blade. The first side-the angle O-the blade position from the center O is 75 mm. Second side-90 degrees-Blade position 281 mm from center O
It is. Third side-The angle is the angle between the extension of the first side and the third side = 1
The angle is 80 degrees, and the position of the blade is 75 mm as a length of a perpendicular from the center O to the third side. 4th side-angle 59.04 degrees, blade position 253.82m
m. The fifth side—the angle is 120.96 degrees between the extension of the first side and the fifth extension, and the position of the blade is 253.82 mm, the length of the perpendicular from the center O to the fifth side. The sixth side—the angle is 90 degrees and the blade position is 203 mm. The seventh side-the angle is 59.04 degrees, the blade position is 186.93m
m. Eighth side-angle is 120.96 degrees, blade position is 186.93
mm. The ninth side—the angle is 90 degrees, and the blade position is 125 mm. 10th side-angle is 59.04 degrees, blade position is 120.05
mm. 11th side-angle is 120.96 degrees, blade position is 120.0
5 mm. The twelfth side—the angle is 90 degrees, and the position of the blade is 47 mm. In this manner, three of the same shape plate A ₀ is cut, the portion is clamped is scrap As.

FIG. 23 also shows a case where a large number of plate members A ₀ of the same shape are cut from a rectangular raw plate A along cutting lines parallel or inclined to the short sides. One corner vertex of the material plate is defined as the center O, and the short side is fixed in parallel with the blade reciprocating path. The angle of the index and the position of the blade are as follows. First side-angle O-blade position 302.16m from center O
m. Second side-angle 36.25 degrees-blade position 22 from center O
4.54 mm. Third side-The angle is 0 degrees, and the position of the blade is the third from the center O.
The length of the perpendicular to the side is 200.44 mm. 4th side-angle 323.75 degrees, tool position 98.16m
m. The fifth side—the angle is 0 degrees, and the position of the blade is 98.72 mm in the length of the perpendicular from the center O to the fifth side. Sixth side-angle is 36.25 degrees, blade position is 60.48 mm
It is. Thus, six of the same shape plate A ₀ is cut, it is finished plate portion is clamped.

Next, another embodiment of the present invention, that is, a type in which the main shaft is pressed downward from above the plate material and rotated, will be described based on one embodiment shown in the drawings. FIGS. 11 to 13
In the part numbers, different parts from those described above are indicated with ('), and the same parts are omitted.

The work placing portion 10 'is supported by a receiving seat at the upper end of a rotatable receiving shaft having a vertical axis while the rectangular plate material A is spread in a horizontal plane. Things. That is, the frame 12 is formed by assembling a rectangular plate three-dimensionally on the upper surface of the rectangular base plate 11, and includes a left wall 12a, a right wall 12b, an intermediate wall 12c, and a horizontal upper wall 12d standing upright on the base plate. At a position forward of the intermediate wall of the frame upper wall 12d, a vertical support cylinder 13 'penetrates and is fixed. A receiving shaft 15 'having a vertical axis is fitted into the support cylinder, supported by a bottom plate 17', and a receiving seat 16 'made of a disk in a plan view is rotatably supported by a bearing 14' at the upper end thereof.

A workpiece clamp 40 'for pressing the center of the material A is concentric above the receiving shaft 15', and the lower end of the main shaft which moves up and down by power with a vertical axis presses the center of the material A. It is supposed to. That is, a column 41 'is erected on the right half of the frame upper wall 12d, and a guide rod 42' is provided on the left side surface thereof at intervals in the front and rear directions.
The third carriage 43 'is vertically guided and slidably guided by this. A main shaft 45 'is rotatably fitted to the left surface of the main shaft 45' via a guide cylinder 46 '. A piston cylinder mechanism 44 'is connected to the upper end of the third carriage 43', and the piston cylinder mechanism 44 'is fixed to the left side surface of the column 41'.

The spindle drive unit 20 'having a spindle motor for rotating the spindle 45' is configured as follows. That is,
An inverter-type continuously variable speed main shaft motor 22 'is attached to the third carriage 43' at a rear side thereof in parallel with the main shaft 45 '. The belt transmission means 23 'is connected between the motor shaft of the spindle motor 22' and the lower part of the spindle 45 '.

The spindle revolving unit 30 'for intermittently rotating the spindle 45' is also provided on the third carriage 43 '. That is, the index shaft 32 'is concentrically connected to the upper end of the main shaft 45' via the clutch 31 '. 33a is a disk brake fixed to the indexing shaft, 33b is a hydraulically operated brake shoe provided on the carriage 43 ', and 34 is an encoder fixed to the indexing shaft.

The operation of the above-described apparatus will be described, but the same parts as those in the above embodiment will be omitted. The material plate A is placed on the receiving seat 16 ', and then the workpiece clamping unit 40' is operated, the piston cylinder mechanism 44 'is operated, and the third carriage 43' is lowered so that the lower end of the spindle 45 ' Hold down material A. Next, the material is fixed by the side clamp unit 50, and one corner of the material is cut by the workpiece cutting unit 60.
Be eliminated. Next, the spindle indexing rotation unit 30 'is operated, the clutch 31' is engaged, the indexing shaft 32 'is connected to the spindle 45', the spindle motor 22 'rotates, and the indexing shaft 32' rotates. Stop. In this state, the corners are cut off again, and similarly cut into polygons.

The present invention is not limited to the examples and embodiments described above, but includes various modifications without departing from the spirit and scope of the appended claims.

[0037]

According to the present invention, a polygonal plate or a finished plate having a shape similar thereto can be safely and automatically processed from a material plate.

[Brief description of the drawings]

FIG. 1 is a front view of one embodiment of a cutting device used for carrying out the method of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a right side view of FIG. 1;

FIG. 4 is an enlarged sectional view of a main part taken along line IV-IV of FIG. 3;

FIG. 5 is a sectional view taken along line VV of FIG. 4;

FIG. 6 is a sectional view of a main part taken along line VI-VI of FIG. 4;

FIG. 7 is an enlarged sectional view of a main part of VII-VII in FIG. 3;

FIG. 8 is a plan view of a main part of FIG. 7;

FIG. 9 is a right side view of a main part in FIG. 7;

FIG. 10 is a left side view of a main part of FIG. 7;

FIG. 11 is a longitudinal sectional view of a work placing portion according to another embodiment.

FIG. 12 is a left side view of a spindle drive unit according to another embodiment.

FIG. 13 is a sectional view taken along line XIII-XIII of FIG.

14 is a cross-sectional view of a main part of XIV-XVI of FIG. 2;

FIG. 15 is a block diagram of computer numerical control.

FIG. 16 is a flowchart of a computer operation.

FIG. 17 is an explanatory diagram of an example of data of an index angle and a blade position depending on a difference in a shape of a completed plate.

FIG. 18 is an explanatory diagram of an example of data of an index angle and a blade position depending on a difference in a shape of a completed plate.

FIG. 19 is an explanatory diagram of an example of data of an index angle and a blade position depending on a difference in a shape of a completed plate.

FIG. 20 is an explanatory diagram of an example of data of an indexing angle and a blade position depending on a difference in a shape of a completed plate.

FIG. 21 is an explanatory diagram of an example of data of an index angle and a blade position depending on a difference in a shape of a completed plate.

FIG. 22 is an explanatory diagram of an example of data of an index angle and a blade position depending on a difference in a shape of a completed plate.

FIG. 23 is an explanatory diagram of an example of data of an index angle and a blade position depending on a difference in a shape of a completed plate.

[Explanation of symbols]

A Workpiece 10 Workpiece placement part 11 Base plate 12 Frame 12a Left wall 12b Right wall 12c Intermediate wall 12d
Upper wall 13 Support cylinder 14 Bearing 15 Main shaft 16 Receiver 20 Main shaft drive unit 21 Intermediate shaft 22 Main shaft motor 23 Belt transmission means 24 Transmission 30 Main shaft indexing rotation unit 31 Brake 31a Disk 31b Shoe 32 Index shaft 33 Belt transmission means 34 Indexing Motor 36 Encoder 40 Workpiece Clamp 41 Column 42 Guide Tube 43 Presser Bar 44 Piston Cylinder Mechanism 45 Rotation Cap 45a Main Body 45b Pad 46 Bearing 50 Side Clamp 51 Stand 52 First Reciprocating Table 53 First Rail 54 Column 55 Side table 55a Fixed part 55b Movable part 55c Hinge 56 Side table elevating means 57 Pad elevating part 57a Link 57b Piston cylinder mechanism 57
c Pad 58 Reciprocating means 58a Screw member 58b Feed screw rod 58c Feed motor 60 Workpiece cutting part 61 Second reciprocating stand 62 Second rail 63 Bracket 64 Blade axis 65 Round blade 66 Belt transmission part 67 Cutting motor 68 Reciprocating means 68a Female screw Member 68b Feed screw rod 68c Cutting reciprocating motor

Claims (1)

[Claims] 1. A material plate is placed on the upper end of a main shaft having a vertical axis, and the upper surface of the material plate is pressed and clamped by a holding rod, and the material plate is reciprocated while rotating a round blade. Using a cutting device designed to cut the main plate, a specific portion of the material plate is determined as a center O, this center is fixed to coincide with the rotation center of the main shaft, the main shaft is indexed and stopped, and the circle is stopped. The blade is reciprocated and cut, and the indexing angle of the main spindle and the distance from the reciprocating path of the round blade to the center of rotation of the main spindle are determined in advance from the shape of the completed plate material and stored as numerical control data. Method for cutting a polygonal plate.