JP2011005597A - Grinding device for rotary saw - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a grinding device for a rotary saw, which forms a grinding striation extending in a rotary direction of the rotary saw on a flank of a chip, and making a rake face of the chip into a mirror face.SOLUTION: This device includes a saw blade feeder (27) for indexing and rotating a rotary saw (3), and a saw moving device (22) for moving the rotary saw (3) forward, backward, in right and left directions. A grinding wheel head (40) is provided on a rotary table (30) rotating with a grinding portion of the rotary saw (3) as a center, and the main shaft (41) of the grinding wheel head (40) is arranged in a direction orthogonal to the radial line of a rotation circle of the rotary table (30). The device further includes grinding wheel moving devices (M5, M6) for moving the grinding wheel head (40) in a radial direction of the rotation circle of the rotary table (30) and a tangential direction of the rotation circle, and a grinding wheel turning device (M7) for turning the grinding wheel with the radial line of the rotation circle of the rotation table (30) as a center.

Description

  The present invention relates to a grinding apparatus for grinding a blade of a rotary saw.

  In general, since a rotating saw blade wears over time, it is necessary to periodically grind and regenerate the blade. In this case, the angle and shape of the rotary saw blade, such as the flank and rake face, vary depending on the type of workpiece, so that the angle and shape of the grinding device for grinding the blade can be easily set. It is necessary to.

  Incidentally, as a conventional rotary saw grinding apparatus, there is one shown in Patent Document 1, that is, FIGS. In FIG. 9, reference numeral 1 denotes a rotary saw grinding apparatus, which grinds a blade (chip) 6 provided on the outer peripheral portion thereof with a grinding wheel 11 of a grinding wheel head 9 while indexing and rotating a disk-shaped rotary saw 3. It is like that. As shown in FIG. 10, the rotary saw 3 has a corrugated blade base 5 formed on the outer periphery of a disc-shaped substrate 4, and a cemented carbide chip (blade) on the front side in the rotational direction of the blade base 5. ) 6 is brazed.

  The grindstone head 9 is rotatable about the corresponding grinding blade part of the rotary saw 3. That is, as shown in FIG. 9, the frame is provided with an arcuate rotation rail 8 centering on the corresponding grinding blade portion of the rotary saw 3, and the rotation table 7 is slidably attached to the rotation rail 8. . A forward / backward movement base 14 that is moved in the radial direction with respect to the rotation circle of the rotation base 7 is attached to the rotation base 7 by a front / rear movement cylinder 14a. A left / right motion base 15 that is moved in a direction orthogonal to the radius line of the rotation circle is attached, and a swivel base 17 that is turned around the radius line of the rotation circle by a turning motor 17a is attached to the left / right motion base 15 A second left / right moving base 18 that is moved in a direction orthogonal to the radial line of the rotation circle by a second left / right moving motor 18a is attached to the base 17, and the grindstone head 9 is attached to the second left / right moving base 18, The main shaft 10 is directed in the left-right direction parallel to the tangent line of the rotation circle. Reference numeral 9a denotes a grindstone motor that rotates the grindstone head 9.

  As shown in FIG. 10, the grinding wheel 11 attached to the main shaft 10 of the grinding wheel head 9 includes a large-diameter and dish-shaped first grinding wheel 12, and a small-diameter overlapped on the outer surface side in the axial direction of the first grinding wheel 12. The first grinding wheel 12 grinds the rake face 6b of the tip 6 on its outer peripheral side surface (FIG. 11), and the second grinding wheel 13 has the tip 6 on its side surface. The flank 6a is ground (FIG. 10).

The conventional one controls the rake face 6b of the chip 6 with the grinding wheel 11 by controlling the driving of the rotary base 7, the longitudinal movement base 14, the lateral movement base 15, the swivel base 17, and the second lateral movement base 18. The flank 6a can be surface ground or curved.
However, since the conventional one grinds the tip by turning or turning only the grinding wheel 11, for example, in order to reduce the load at the time of cutting, the flank of the tip, In addition, it becomes difficult to form grinding marks (grinding stone marks) extending in the rotating direction of the rotary saw on the chamfered surfaces on both sides thereof, or the rake face of the chip cannot be made into a mirror surface. It was.

Japanese Patent No. 3905633

  The present invention enables surface grinding or curved surface grinding of a rake face and a flank face, and also forms a grinding mark (grinding wheel mark) extending in the rotational direction of a rotary saw on the flank face of the chip, It is an object of the present invention to obtain a rotary saw grinding apparatus capable of making a rake surface into a mirror surface.

The present invention is configured as follows to achieve the above object. That is, the invention according to claim 1 provides a saw blade feeding device for providing a rotary saw for grinding on a frame, indexing and rotating the rotary saw, and a saw moving device for moving the rotary saw in the front-rear and left-right directions. The frame is provided with a rotating table that is rotated about the grinding part of the rotary saw, the grindstone head is provided on the rotating table, and the main axis of the grindstone head is the rotating circle of the rotating table. A grindstone moving device that is arranged in a direction perpendicular to the radial line of the wheel and moves the grindstone head on the turntable in a radial direction of the turning circle and a tangential direction of the turning circle, and the turning A grindstone turning device for turning around a radius line of the turning circle on the table is provided.
According to a second aspect of the present invention, a first grinding wheel having a grinding surface on the outer peripheral surface and a second grinding wheel having a grinding surface on the outer periphery are provided at a predetermined interval in the axial direction on the main shaft of the grinding wheel head. It is what I did.
According to the invention of claim 3, the grindstone turning device is operated so that the main shaft of the grindstone head is positioned in parallel with the axis of the rotary saw, and then the grindstone moving device or the saw moving device is operated to operate the flank of the rotary saw blade. , And both side edges of the flank are brought into contact with the outer peripheral surface of the second grinding wheel provided on the main shaft.
In the invention according to claim 4, the grindstone turning device is operated so that the main shaft of the grindstone head is orthogonal to the axis of the rotary saw, and then the saw moving device is operated so that the rake face of the blade of the rotary saw is the first. The first grinding wheel is moved in the tangential direction while being in contact with the outer peripheral side surface of the grinding wheel.

According to the first aspect of the present invention, the grinding wheel head is rotated and rotated via the rotating table and the rotating table, so that the flank, rake surface, etc. of the blade is surface ground or curved surface ground at an arbitrary angle. can do. Further, when the blade is ground, the rotary saw is moved in the left-right direction, so that the rake face of the blade can be made into a mirror surface or a grinding streak (grinding stone mark) in the rotation direction can be formed on the flank face of the blade.
In the invention according to claim 2, since the first grinding wheel having the grinding surface on the outer peripheral side and the second grinding wheel having the grinding surface on the outer periphery are separated in the axial direction, the predetermined surface of the blade with one of the grinding wheels ( When grinding the flank or rake face), the other grindstone does not come into contact with the other blade part.
In the invention according to claim 3, when the flank face of the blade is ground on the outer peripheral surface of the grinding wheel, the grinding wheel moving device or the saw moving device is operated to move the grinding wheel and the rotary saw in the front-rear and left-right directions relative to each other. As a result, both sides of the flank face of the blade can be chamfered, and grinding streaks extending in the rotation direction of the rotary saw can be formed on the chamfered part and the flank face, thereby reducing the load during cutting. be able to.
In the invention according to claim 4, when the rake face of the blade is ground on the outer peripheral side surface of the grinding wheel, the rake face moves in the tangential direction on the outer peripheral side surface of the grinding wheel when the rotary saw is moved in the left-right (axial) direction. As a result, the rake face is ground to have a large number of grinding marks having different directions, and the rake face is ground to a mirror surface.

It is a top view of the grinding device which shows the grinding posture of the flank according to the present invention. It is a side view of FIG. It is a principal part enlarged plan view of FIG. It is a principal part expansion perspective view of the rotary saw with which the flank was ground. It is a top view of the grinding device which shows the grinding posture of the rake face by the present invention. It is a principal part enlarged plan view of FIG. It is front sectional drawing of the rotary saw by which the rake face was ground. It is a principal part expansion perspective view of the rotary saw with which the flank and rake face were ground. It is a side view which shows the conventional grinding device. It is a side view which shows the grinding state of the flank by the past. It is a side view which shows the grinding state of the rake face by the past.

  In FIGS. 1 and 2, reference numeral 20 denotes a rotary saw grinding device, and a grinding wheel 42 provided with a blade (chip) 6 on the outer peripheral portion thereof on a grinding wheel head 40 while indexing and rotating a disk-shaped rotary saw 3. It is designed to grind with. The rotary saw 3 is attached to the frame 21 via a saw moving device 22 and a saw blade feeding device 27.

  The saw moving device 22 is attached to the right part of the frame 21 in FIG. 1 with a left / right movable table 23 that is moved in the left / right (up and down in FIG. 1) direction by a left / right moving motor M1 (servo motor). 23 is attached with a saw support 25 that is moved in the front-rear direction (left and right in FIG. 1) by a front-rear moving motor M2 (servo motor). In FIG. 1, 24 is a linear guide that supports the left / right movable base 23 so as to be slidable in the left / right direction, and 26 is a feed screw that moves the saw support base 25 in the front / rear direction.

The saw blade feeding device 27 includes a saw support shaft 28 for supporting the rotary saw 3 on the saw support base 25 so as to be rotatable about an axis O ₁ in the left and right (up and down in FIG. 1) direction, and the saw support shaft 28. For example, a saw blade feed motor M3 (servo motor) for indexing and rotating each blade is attached. As shown in FIGS. 3 and 4, the rotary saw 3 is formed of a corrugated blade base 5 on the outer periphery of a disk-shaped substrate 4, and is made of cemented carbide on the front side in the rotational direction of the blade base 5. A chip (blade) 6 is brazed, and a center hole formed in the center of the substrate 4 is fitted and fixed to the saw support shaft 28.

The grindstone head 40 is attached to the frame 21 side as follows. First, as shown in FIG. 1, a turntable 30 is attached to a frame 21 so as to be turnable. The rotary table 30 is configured such that the rotary axis O ₂ of the rotary shaft 31 becomes an axis passing through the grinding blade portion of the rotary saw 3, and the rotary table 30 is moved to the rotary motor M 4 (servo motor). ). The rotating base 30 extends leftward from the rotating shaft 31 in FIGS. 1 and 2 and moves slidably along an arcuate guide rail 32.

A swivel base 36 is attached to the turntable 30 via a back-and-forth moving table 34, and a grindstone head 40 is attached to the swivel base 36 via a left-right moving table 35. The back-and-forth moving table 34 is supported on the rotating table 30 so as to be movable in the radial direction with respect to the rotating circle, and is controlled to move in the radial direction by a back-and-forth moving motor (grinding stone moving device) M5. The left / right moving base 35 is supported on the swivel base 36 so as to be movable in the left / right direction (vertical direction in FIG. 1) orthogonal to the moving direction of the front / rear moving base 34, and is moved by the left / right movement motor (grinding stone moving device) M6. The movement is controlled in the left-right direction. The swivel base 36 is supported by the back-and-forth moving base 34 so as to be able to turn around an axis O ₃ parallel to the radial line of the turning circle of the turning base 30, and is turned by a turning motor (grinding stone turning device) M7. The turn is controlled.

The grindstone head 40 is mounted on the swivel base 36 with the rotation axis O ₄ of the main shaft 41 arranged in a direction orthogonal to the swivel axis O ₃ of the swivel base 36, and the main spindle 41 intersecting the swivel axis O ₃ . A grinding wheel 42 is attached to the end. As shown in FIG. 3, the grinding wheel 42 has a large-diameter and dish-shaped first grinding wheel 43 and a small-diameter and thick disk-shaped second grinding wheel 44 that are coaxially spaced apart in the axial direction. Install.

  The first grinding wheel 43 is attached to the base side of the main shaft 41 and grinds the rake face 6b of the chip 6. The outer periphery of the first grinding wheel 43 is formed into a thin disk shape, and abrasive grains are fixed to the outer peripheral side surface. A ground surface 43a. The second grinding wheel 44 is attached to the tip side of the main shaft 41 to grind the flank 6a of the chip 6 and chamfer (grind) both side edges of the flank 6a. The chamfered portion has a central ground surface 44a with abrasive grains fixed thereto, and both side ground surfaces 44b. The spindle 41 that supports the first grinding wheel 43 and the second grinding wheel 44 is rotated through a belt and a pulley by a grinding wheel motor M8 (FIG. 1) provided on the rear side of the swivel base 36. The first grinding wheel 43 may be attached to the distal end side of the main shaft 41, and the second grinding wheel 44 may be attached to the base side of the main shaft 41.

Each of the motors M1 to M8 described above is composed of a servo motor, and is controlled by a control device to set the posture (orientation) of the grinding wheel 42 or the movement amount of the grinding wheel 42 and the rotary saw. The flank 6a or the rake face 6b of the tip 6 is ground. For example, when grinding the flank 6a of the tip 6, as shown in FIGS. 1 and 2, the swivel motor 36 turns the swivel base 36 to rotate the spindle 41 (rotation axis O ₄ ) of the grindstone head 40. While being parallel to the rotation axis O ₁ of the rotary saw 3, the rotation motor M 4, the forward / backward movement motor M 5, and the left / right movement motor M 6 are driven and controlled. As shown in FIG. The outer periphery of 44 (grinding surfaces 44a and 44b) is made to face the flank 6a of the corresponding chip 6.

  In this state, the grindstone moving device (M5, M6) or the saw moving device 22 (M1, M2) is driven and controlled to move the grinding grindstone 42 and the rotary saw 3 relative to each other in the left-right direction. For example, as shown in FIG. 3, the rotary saw 3 is moved from the solid line position toward the imaginary line direction (downward in FIG. 3) with respect to the outer circumference (grinding surfaces 44 a and 44 b) of the second grinding wheel 44. The flank 6a is chamfered at the central grinding surface 44a (outer peripheral surface) of the grinding wheel 44, and both side edges 6a-1 of the flank 6a are chamfered at both side grinding surfaces 44b (slope) of the second grinding wheel 44, as shown in FIG. As shown, grinding streaks (grinding stone marks) K1 extending in the rotation direction of the rotary saw 3 are formed on the flank 6a of the chip 6 and the chamfered side edges 6a-1. In FIG. 4, 6c is a chip | tip division | segmentation groove | channel formed in a part of flank 6a.

Further, when grinding the rake face 6b of the tip 6, as shown in FIG. 5, the turning table 36 is turned by the turning motor M7, and the main shaft 41 (rotation axis O ₄ ) of the grindstone head 40 is turned to the rotary saw 3. together is orthogonal to the rotation axis O ₁ of rotation motor M4, drives and controls the back-and-forth movement motor M5, and lateral movement motor M6 (Fig. 1), as shown in FIG. 6, the first grinding wheel head 40 The outer peripheral side surface (grinding surface 43a) of the grinding wheel 43 is made to face the rake face 6b of the corresponding chip 6.

  In this state, the forward / backward movement motor M2 and the left / right movement motor M1 are driven and controlled, and the rotary saw 3 is moved from the solid line position in FIG. 6 toward the imaginary line direction (downward in FIG. 6) to grind the first grinding wheel 43. The rake face 6b is ground by the face 43a, and as shown in FIGS. 7 and 8, a large number of grinding marks K2 having different directions are formed on the rake face 6b of the chip 6, and the rake face 6b is finished to be a mirror surface.

DESCRIPTION OF SYMBOLS 3 Rotating saw 4 Board | substrate 5 Saw blade 6 Tip 6a Flank 6a-1 Both-sides edge 6b Rake face 6c Chip division groove 20 Grinding device 21 Frame 22 Saw moving device 23 Left and right movable stand 24 Linear guide 25 Saw support stand 26 Feed screw 27 saw blade feeding device 28 saw support shaft 30 rotating table 31 rotating shaft 32 arm portion 33 guide rail 34 longitudinal moving table 35 left and right moving table 36 rotating table 37 rotating shaft 40 grinding wheel head 41 main shaft 42 grinding wheel 43 first grinding wheel 43 43a Grinding surface 44 Second grinding wheel 44a, 44b Grinding surface M1 Left / right movement motor M2 Forward / backward movement motor M3 Saw blade feed motor M4 Rotation motor M5 Forward / backward movement motor (whetstone moving device)
M6 Left-right motor (grinding wheel moving device)
M7 turning motor (grinding wheel turning device)
M8 Grinding wheel motor O ₁ Rotating shaft center of rotary saw O ₂ Rotating shaft center of rotating base O ₃ Rotating shaft center of grinding wheel head ₄ Rotating shaft center of main spindle

Claims (4)

  A rotary saw (3) for grinding is provided on the frame, and a saw blade feeding device (27) for indexing and rotating the rotary saw (3), and a saw for moving the rotary saw (3) in the front-rear and left-right directions A moving device (22), a rotating table (30) that is rotated about the grinding part of the rotary saw (3) is provided on the frame, and a grindstone head (40) is mounted on the rotating table (30). And the main shaft (41) of the grindstone head (40) is arranged in a direction perpendicular to the radial line of the rotation circle of the rotating table (30), and the grindstone head (40) is disposed on the rotating table. (30) A grindstone moving device (M5, M6) for moving the rotating circle in a radial direction and a tangential direction of the rotating circle, and a radial line of the rotating circle on the rotating table (30). And a grindstone turning device (M7) for turning about the center of the rotary saw. .   A first grinding wheel (43) having a grinding surface on the outer peripheral side surface and a second grinding wheel (44) having a grinding surface on the outer periphery are arranged at a predetermined interval in the axial direction on the main shaft (41) of the grinding wheel head (40). The rotary saw grinding apparatus according to claim 1, wherein the grinding apparatus is provided.   The grindstone turning device (M7) is operated to position the main shaft (41) of the grindstone head (40) parallel to the axis of the rotary saw (3), and then the grindstone moving device (M5, M6) or saw moving device ( 22), the second grinding wheel (44) in which the flank (6a) of the blade (6) of the rotary saw (3) and both side edges of the flank (6a) are provided on the main shaft (41). The rotary saw grinding apparatus according to claim 1 or 2, wherein the grinding device is in contact with an outer peripheral surface of the rotary saw.   The grindstone turning device (M7) is operated so that the main shaft (41) of the grindstone head (40) is orthogonal to the axis of the rotary saw (3), and then the saw moving device (22) is operated to turn the rotary saw ( The rake face (6b) of the blade (6) of 3) is moved in a tangential direction with respect to the first grinding wheel (43) while contacting the outer peripheral side surface of the first grinding wheel (43). Item 3. The rotary saw grinding apparatus according to Item 1 or 2.

Images