JPH0358865B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a polishing device for polishing tools such as drills, reamers, taps, and end mills having straight and spiral cutting edges.

When a tool becomes no longer sharp, the cutting edge is polished so that it can be used again, but polishing a tool is extremely difficult and requires advanced technology. For this reason, tools are generally polished by a professional engineer. For this reason, it takes time and money to polish tools, so although tool polishing equipment has been devised and developed so that workers can polish tools in factories, they have not been able to provide satisfactory polishing. It is not possible to do this, and the polishing equipment has not become sufficient.

In view of the above points, the present invention aims to automate the polishing of tools with straight and spiral cutting edges, and to enable even operators with no particular polishing skills to easily and reliably polish the tools in a short time. It is a tool polishing device, and its gist is as follows:
(a) a tool gripping mechanism that grips a tool at its tip; a tool rotation drive mechanism that rotates the tool by a motor; a tool feed drive mechanism that sends the tool in the axial direction by a motor; and a feed rate adjustment mechanism for the tool. (b) a first movement adjustment mechanism that adjusts the movement of the tool support device in the axial direction of the tool; and a movement forcing section that forcibly moves the tool support device in a direction perpendicular to the axial direction. a second movement adjustment mechanism that is rotatably supported in the axial direction by a support leg; and (d) a grinder support on an arm having one end rotatably attached to a shaft on which the rotating plate is positioned above and rotating together with the rotating plate. The arm has a vertical movement adjustment part that moves the grinder up and down to move the grinder up and down, and a contact/separation movement adjustment part that moves the grinder support in a direction toward and away from the tool. (e) rotating the grinder supporting device 90 degrees around the tip of the tool gripped by the tool gripping mechanism, and simultaneously rotating the rotary plate to rotate the movement adjustment mechanism; (f) a motor for rotating the tool and a rotation drive device for feeding the tool in the axial direction; The tool has a control means that detects the cutting edge and cutting edge of the tool using an optical sensor and controls the motor by rotating it according to the lead angle of the cutting edge.

An embodiment of the present invention will be described in detail below with reference to the drawings.

In the drawings, 1 includes a tool gripping mechanism 2 that grips a tool A at its tip, a tool rotation drive mechanism 3 that rotates the tool A, a tool feed drive mechanism 4 that feeds the tool A in the axial direction, and a tool feed amount adjustment mechanism 5. It is a tool support device equipped with.

In the case of the tool gripping mechanism 2, there is a tool gripping part 6 at the tip.
It consists of a rotating shaft 7 provided with a rotating shaft 7 and a rotating shaft support part 8 that rotatably supports the rotating shaft 7. 9 is a bearing.

The tool rotation drive mechanism 3 consists of a motor 10 for positioning the cutting edge of the tool A and a motor 11 for leading, both of which are fixed to the rotary shaft support 8. By driving the motors 10 and 11, the rotating shaft 7 is rotated. The driving time charts and rotational speeds of the motors 10 and 11 are controlled by control means, which will be described later.

In the case of the tool feed drive mechanism 4 that feeds the tool A in the axial direction, a hollow support frame 12 that supports the rotary shaft support part 8 slidably in the axial direction is provided with a hollow support frame 12 located below the rotary shaft support part 8. A male threaded rod 13 is provided rotatably in the axial direction, a female threaded portion 14 provided at the lower part of the rotary shaft support portion 8 is screwed onto this male threaded rod 13, and the male threaded rod 13 is rotated in forward and reverse directions by a motor 15. , so as to feed the rotating shaft support part 8 in the axial direction. The motor 15 is fixed to the support frame 12, and the driving time chart, rotational speed, or feed speed of the motor 15 is controlled by a control means to be described later.

In the feed amount adjustment mechanism 5 for the tool A, two micro switches 16 and 17 are provided in the support frame 12 along the male threaded rod 13, and the micro switches 16 and 17 are operated by the rotation of the male threaded rod 13. When the female screw portion 14 that is being fed comes into contact with the motor 15, the motor 15 rotates in the opposite direction or stops. The interval between the micro switches 16 and 17 can be adjusted from outside the support frame 12, and by adjusting the interval between the micro switches 16 and 17, the feed rate of the female threaded portion 14, that is, the tool A can be adjusted. It's getting old.

Reference numeral 18 denotes a movement adjustment device that adjusts the movement of the tool support device 1 in the axial direction, that is, the axial direction of the tool A and a direction orthogonal to this axial direction. The movement adjustment device 18 includes a first movement adjustment mechanism 19 that moves the tool support device 1 in the axial direction and a second movement adjustment mechanism 20 that moves the tool support device 1 in a direction perpendicular to the axial direction. The first movement adjustment mechanism 19 has a pinion 22 provided on a support part 21 that supports the support frame 12 slidably in the axial direction on the upper surface, and a rack 23 that engages with the pinion 22 on the lower surface of the support frame 12. the pinion 22 by operating the handle 24.
By rotating the support frame 12, the movement of the support frame 12 in the axial direction can be mechanically adjusted.
The support portion 21 is rotatably attached to a support leg 25 erected on the second movement adjustment mechanism 20 so as to be rotatable in the axial direction, and its tip engages with the lower surface of a rotary plate to be described later. 26 is a rotor. The second movement adjustment mechanism 20 includes a support base 27 that supports the support part 21 via support legs 25 on the upper surface and is slidably provided on a base 28 in a direction perpendicular to the axial direction. A flange portion 30 is provided on the lower surface of the stand 27 to slidably fit the male threaded rod 29 in a direction perpendicular to the axial direction, while a female threaded portion 31 is provided on the base 28 to be screwed into the male threaded rod 29. A spring 33 is interposed between the flange 32 fixed to the male threaded rod 29 and the flange 30. One end of an L-shaped operating rod 34 whose middle part is rotatably pivoted to the support base 27 is in contact with the outer surface of the flange 32 . By operating the handle 35, the flange 32 pushes the flange 30 via the spring 33, and by pushing one end of the operating rod 34, the movement of the support base 27 can be mechanically adjusted. . Furthermore, the second
The movement adjustment mechanism 20 includes a movement forcing section 36 that forcibly moves the support base 27 in the same direction (direction perpendicular to the axial direction). This movement forcing section 36 is connected to a solenoid 37 provided on the support base 27 and the operating rod 3.
4, and by energizing the solenoid 37 and pulling up the operating rod 34, one end of the operating rod 34 presses the collar 32 provided on the male threaded rod 29, thereby forcing the support base 27. It is now being moved to

Reference numeral 38 denotes an optical sensor that senses the cutting edge of the tool A held by the tool holding mechanism 2. By sensing the cutting edge of the tool A with this optical sensor 38, the motor 10 and the motor 1
1. It is designed to control the motor 15.

39 is a glider, and this glider 39 is equipped with a motor 41 that rotates a grindstone 40, and this grinder 39 is in a state where the grindstone 40 is positioned close to the cutting edge of the tool A held by the tool holding mechanism 2. and is supported by a grinder support device 42. Further, the grinder support device 42 includes a vertical movement adjustment section 43 that moves the grinder 39 up and down.
A grinder movement adjustment mechanism 45 is provided, which includes a contact/separation movement adjustment section 44 for moving the grinder 39 toward and away from the tool A. The grinder support device 42 consists of an arm 47 whose one end is rotatably attached to a shaft 46 erected on the base 28, and a grinder support body 48 which is slidably engaged with the arm 47 in the longitudinal direction. The grinder 39 is mounted on the grinder support 48 and the vertical movement adjustment section 43
It is supported in a vertically adjustable manner. 49 is a handle of the vertical movement adjusting section 43, and vertical movement is performed by operating the handle 49 and rotating a screw (not shown). The axis of the shaft 46 is erected at a position that coincides with the center of the tip of the tool A. The contact/separation movement adjustment section 44 has a hollow body 50 provided at the other end of the arm 47, and a male threaded rod 5 attached to the hollow body 50.
1 is provided passing through the arm 47 in the longitudinal direction, and this male threaded rod 51 is screwed into the grinder support 48 which is slidably engaged with the arm 47, and by rotating the male threaded rod 51, the grinder support is 48 is made to slide. Reference numeral 52 denotes a collar portion provided on the male threaded rod 51, which is located inside the hollow body 50 and abuts against one wall body 53. 54 is a spring interposed between the other wall 55 and the flange 52 within the hollow body 50, and 56 is a handle for rotating the male threaded rod 51. Furthermore, the grinder support body 48
In addition to 4, the contact/separation movement forcing unit, which will be described later, forcibly causes the contact/separation movement.

57, the grinder support device 42 is attached to the tool A.
It is a rotation drive device that rotates 90 degrees around the tip. This rotation drive device 57 includes a worm 58 provided concentrically on the shaft 46, and a rotary shaft 61 mounted on two opposing brackets 59 and 60 formed close to the worm 58 of the arm 47 pivoted on the shaft 46. A gear 62 that meshes with the worm 58 is provided between the brackets 59 and 60 on the rotating shaft 61, and the rotating shaft 61 is connected to the gears 63 and 62.
It is configured to be rotated by a motor 65 provided on the grinder support device 42 via a motor 64 .
The gear 62 provided on the rotating shaft 61 is such that its both ends abut against the brackets 59, 60, respectively, and the length of the gear 62 is such that the gear 62 is in contact with the brackets 59, 60, respectively.
It is slightly shorter than the distance between 60 and 60. When the rotary shaft 61 is rotated by the motor 65, the gear 62 first moves in the axial direction of the rotary shaft 61 by the worm 58, and the end 66 of the gear 62 moves toward the bracket 60.
When the grinder support device 42 rotates 90 degrees, the arm 47 is activated by a micro switch (not shown). This micro switch causes the motor 65 to rotate in the opposite direction, and due to the reverse rotation of the motor 65, the gear 62 first moves straight in the opposite direction, and when its end 67 comes into contact with the bracket 59, The rotating shaft 61 is prevented from moving straight, and as a result, the grinder support device 42 is inverted 90 degrees.

Reference numeral 68 denotes a force unit for forcibly moving the grinder support 48 towards and away from each other. This approaching/separating movement forcing part 68 has one end of a lever 69 rotatably attached to the hollow body 50, and a part of the lever 69 is rotatably fitted to the male threaded rod 51, and this fitting part 7
0 is engaged with a flange 71 provided on the male threaded rod 51, and its tip is engaged with the end of the rotating shaft 61. Then, when the rotary shaft 61 moves straight before the grinder support device 42 is reversed, the lever 69 rotates in response to this straight movement, and the male threaded rod 51
is pulled in the separating direction against the spring force of the spring 54, and the grinder support body 48 is forcibly moved in the separating direction.

A rotary plate 72 is located on the axis of the shaft 46, is provided on the arm 47, and rotates as the arm 47 rotates. The lower surface 73 of this rotating plate 72
A rotor 26 provided at the tip of the support portion 21 is engaged with the rotor 26 . The lower surface of the rotating plate 72 is formed into a tapered surface, and as the arm 47 rotates, the rotating plate 72
2 rotates the support portion 21 in the vertical direction. That is, the tool A is designed to move up and down.
A tapered surface is formed on the lower surface 73 of the rotary plate 72 so that the vertical movement of the tool A is performed according to the lead of the cutting edge of the tool A. Reference numeral 74 denotes a centering part erected on the upper surface of the rotary plate 72 at the center of the rotary plate 72, that is, on the axis of the shaft 46, and the tip of the tool A held by the tool gripping mechanism 2 is aligned with this centering part 74. It's like this. The centering portion 74 can be bent in the middle.

74, 75, 76, 77, 78, 79, 80,
81 is a pulley, and 82, 83, 84, and 85 are belts.

Next, control of the operation of each drive section will be explained.
Motors 10 and 1 that drive the tool rotation drive mechanism 3
1. A motor 15 that drives the tool feed drive mechanism 4;
The time charts, rotation direction, and rotation speed of the motor 41 that drives the grinder 39 and the motor 65 that drives the rotary drive device 57, as well as the movement forcing section 36 that forcibly moves the tool support device 1 in a direction perpendicular to the axial direction. The operation is automatically controlled by a control means including an optical sensor 34, a micro switch, and a combination of an IC and a relay.
These specific control operations will be explained in conjunction with the explanation of the operation of the present invention.

Next, the operation of the present invention will be explained for each type of tool to be polished.

First, the case of polishing a tool with a spiral cutting edge will be explained.

First, the tool A is fixed to the tool gripping part 6 of the tool gripping mechanism 2, and the handle 24 of the first movement adjustment mechanism 19 is operated to move the tool support device 1 in the axial direction, so that the tip of the tool A is placed on the rotary plate 72. Centering section 7 installed vertically
4. The tip of tool A is the centering part 7
4, centering part 74
, then operate the handle 49 of the vertical movement adjustment section 43 of the grinder support device 42 to position the grindstone 40 of the grinder 39 at the height of the tool A, and then operate the handle 35 of the second movement adjustment mechanism 20. Then, the tool A is brought into contact with the grindstone 40. Next, tool A
Measure the length of the cutting edge, and adjust between the micro switches 16 and 17 of the tool feed rate adjustment mechanism 5. Next, turn on the power switch (not shown), press the start button (not shown), and the tool rotation drive mechanism 3
When the optical sensor 38 detects that the cutting edge of the tool A has rotated to the polishing position, the motor 10 stops rotating in response to this detection signal, and the tool rotation drive mechanism 3 stops rotating. The motor 11, the motor 15 of the tool feed drive mechanism 4, and the motor 41 of the grinder 39 rotate. The motor 11 is a lead motor that rotates the tool A, and at the same time as the tool A moves forward due to the drive of the motor 15, the optical sensor 38 detects the cutting edge of the tool A and rotates the motor 11 according to the lead of the tool A. It's becoming like that. Here, the tool A is reliably polished by the grindstone 40 of the grinder 39.

When the blade length of the tool A has been polished, the female threaded portion 14 provided on the rotary shaft support 8 comes into contact with the micro switch 16 of the tool feed adjustment mechanism 5, and upon receiving this contact signal, the motor 11, 15 and 41 are stopped, and at the same time, the solenoid 37 of the movement forcing section 36 provided in the second movement adjustment mechanism 20 is energized, and the tool support device 1 is moved in a direction perpendicular to the axial direction and away from the grindstone 40 of the grinder 39. In this state, the motor 15 reverses, the rotating shaft support 8, that is, the tool A retreats, and when the internal thread 14 provided on the rotating shaft support 8 contacts the micro switch 17, the motor 15 stops, and at the same time the solenoid 37 It is now possible to turn off the excitation of the In this way, one process of polishing a tool having a spiral cutting edge is completed.

Next, the case of sharpening a tool with a straight cutting edge is similar to the case of grinding a tool with a spiral cutting edge, but since the cutting edge is straight in this case, the tool is moved by a motor only when positioning the first blade. 10, the motor 11 does not need to be rotated after that and is not driven.

Next, I will explain how to polish a ball end mill.

First, a ball end mill (hereinafter simply referred to as tool A) is fixed to the tool gripping part 6 of the tool gripping mechanism 2,
Operate the handle 24 of the first movement adjustment mechanism 19 to move the tool support device 1 in the axial direction, bring the tip of the tool A into contact with the centering part 74 erected on the rotary plate 72, and then center the tool A. Defeat section 74. Next, the handle 4 of the vertical movement adjustment section 43 of the grinder support device 42
9 to position the grindstone 40 of the grinder 39 at the height of the tool A, and then
The handle 56 of the grinder 39 is operated to bring the grindstone 40 of the grinder 39 into contact with the outer periphery of the tip of the tool A from a direction perpendicular to the axis of the tool A. Next, turn on the power switch (not shown) of the circuit configured for polishing the tool A (bow end mill), and press the start button (not shown) to start the motor 4 of the grinder 39.
1 rotates and starts polishing the tool A, and at the same time, the motor 65 of the rotary drive device 57 rotates to rotate the rotary shaft 61 via the gears 63 and 64. This rotating shaft 6
A gear 62 that meshes with the worm 58 by one rotation.
rotates, and the end 66 of the gear 62 engages the bracket 6.
0, the rotation of the gear 62 causes the arm 47 that engages with the grinder support 48 to move toward the shaft 46.
The motor 41 is rotated around , and at a position rotated 90 degrees, it contacts a microswitch, which stops the motor 41 and causes the motor 65 to rotate in the opposite direction. The tip of the tool A is polished by the rotation of the arm 47, that is, the rotation of the grinder support device 42, and the tapered surface formed on the lower surface of the rotary plate 72, which rotates with the rotation of the arm 47, allows the tool A to be rotated in the axial direction. tilts up and down,
The grinding by the grinder 39 is performed according to the lead of the cutting edge at the tip of the tool.
When the motor 65 rotates in the opposite direction, the gear 62
Due to the reverse rotation, the rotating shaft 61 first moves straight in the axial direction until the end 67 of the gear 62 comes into contact with the bracket 59. This linear movement of the rotary shaft 61 rotates the lever 69 of the approaching/separating movement control section 68, and the male threaded rod 5
1 in the direction of separation against the rebound of the spring 54,
As a result, the grinder support 48 is forcibly separated in the separating direction, and the grinding wheel 4 of the grinder 39 is
0 is separated from the tip of tool A. When the end 67 of the gear 62 comes into contact with the bracket 59 due to the rotation of the motor 65, further straight movement is prevented, and the arm 4
7, the grinder support device 42 rotates in the opposite direction and comes into contact with a microswitch (not shown) at its original position, that is, at the point where it rotates 90 degrees in the opposite direction, causing the motor 65 to rotate forward again and the end 66 of the gear 62 to move straight. It rotates until it comes into contact with the bracket 60 and then stops. In this way, one step of polishing tool A, that is, the ball end mill, is completed.

The embodiments and operations of the present invention have been described above, but the present invention comprises (a) a tool gripping mechanism that grips a tool at its tip, a tool rotation drive mechanism that rotates the tool with a motor, and a tool rotation drive mechanism that rotates the tool with a motor. (b) a first movement adjustment mechanism that adjusts the movement of the tool support device in the axial direction of the tool; (c) a second movement adjustment mechanism that has a movement forcing part that forcibly moves in a direction perpendicular to the second movement adjustment mechanism and is rotatably supported in the axial direction by a support leg; and (c) the second movement adjustment mechanism. (d) a rotary plate having a lower surface formed as a tapered surface that abuts the upper end of the rotary plate and rotates the movement adjustment device around the support leg, and (d) one end rotatable on a shaft that positions the rotary plate upward A grinder support body is slidably engaged with an arm that is pivoted on and rotates together with the rotary plate, a vertical movement adjustment part that moves the grinder up and down is attached to this grinder support body, and the grinder support body is moved to the arm. and (e) rotating the grinder support device by 90 degrees around the tip of the tool gripped by the tool gripping mechanism. and (f) a rotation drive device that simultaneously rotates the rotary plate and rotates the movement adjustment mechanism;
Regarding the rotational speed and the feed rate in the axial direction of the tool, the motor that rotates the tool and the motor that sends the tool in the axial direction are controlled by sensing the cutting edge and cutting edge of the tool with an optical sensor and controlling the lead of the cutting blade. Since it has a control means that controls the rotation according to the angle, the tool can be polished mechanically, and the polishing is far superior to that of a professional engineer. Moreover, the working time can be shortened, and each operation can be performed automatically, so that the efficiency of the polishing work can be improved.

Note that it is also possible to manufacture a tool by grinding a material (round bar) using the tool polishing apparatus according to the present invention. Particularly when manufacturing a spiral tool, the rotation of the tool rotation drive mechanism should be set in advance according to the cutting edge lead for which rotation control is required.

[Brief explanation of drawings]

FIG. 1 is an overall perspective view showing an embodiment of the present invention, FIG. 2 is a schematic plan view, and FIG. 3 is a schematic front view showing a tool support device that is part of the mechanism of the present invention.
Fig. 4 is a partially omitted right side view of Fig. 3, Fig. 5 is a partially cutaway schematic front view showing the tool support device and the movement adjustment device, and Fig. 6 shows the vertical rotation of the movement adjustment device. 7 is a sectional view showing a part of the movement adjustment device, FIG. 8 is an explanatory view showing the operation of FIG. 7,
FIG. 9 is a partially omitted perspective view showing the grinder support device and rotation drive device, and FIG. 10 is the − of FIG. 9.
11 is a sectional view of the rotary drive device shown in FIG. 9, FIG. 12 is a front view of FIG. 9, FIG. 13 is a partially omitted enlarged plan view of FIG. 9, and FIG. 14 stomach,
B and C are explanatory diagrams showing the movement of gears that are part of the configuration of the rotary drive device. DESCRIPTION OF SYMBOLS 1... Tool support device, 2... Tool gripping mechanism, 3... Tool rotation drive mechanism, 4... Tool feed mechanism, 5... Tool feed amount adjustment mechanism, 18... Movement adjustment device, 39... Grinder, 42... Grinder support device, 45 …
Grinder movement adjustment mechanism, 57... Rotation drive device.

Claims (1)

[Claims] 1(a) A tool gripping mechanism that grips a tool at its tip, a tool rotation drive mechanism that rotates the tool by a motor, a tool feed drive mechanism that feeds the tool in the axial direction by a motor, (b) a first movement adjustment mechanism that adjusts the movement of the tool support device in the axial direction of the tool; and a tool support device that is forcibly moved in a direction perpendicular to the axial direction. (c) a second movement adjustment mechanism having a movement forcing part and rotatably supported in the axial direction by a support leg; (d) a rotating plate having a formed lower surface and rotating the movement adjustment device around the support leg; A grinder support is slidably engaged with the arm, a vertical movement adjustment part for moving the grinder up and down is attached to the grinder support, and the grinder support is moved in the arm to move the grinder toward and away from the tool. (e) rotating the grinder supporting device 90 degrees around the tip of the tool gripped by the tool gripping mechanism, and simultaneously rotating the rotary plate; (f) a motor that rotates the tool in the case of the rotation, rotation direction, rotation speed of the tool, and feeding/feeding speed in the axial direction of the tool; and a control means for controlling the motor that sends the tool in the axial direction by detecting the cutting edge and cutting edge of the tool with an optical sensor and rotating it according to the lead angle of the cutting edge (g) Polishing of straight and spiral tools Device.