JPS641273B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a small tabletop drill grinding machine, which is used in various applications such as industrial machine manufacturing, household electrical machine manufacturing, automobile manufacturing, and construction material manufacturing. The present invention relates to a grinding machine that grinds the tip of a drill used in the manufacturing field.

(Prior technology) As a conventional small drill grinder,
There is something related to No. 47275.

In this device, if the drill to be re-ground is gripped by a chuck device and the turntable and grinding wheel are driven to rotate, while the drill rotates once with the turntable, the horizontal movement cam installed on the table and the The grinding wheel reciprocates horizontally according to a predetermined locus defined by the shape of the moving cam, and is also vertically moved up and down, thereby simultaneously re-grinding and thinning the drill cutting edge.

However, in this drill grinding machine,
When the drill and turntable rotate once, the grindstone returns to its original height, so if you try to cut longer with the drill cutting edge, the operating handle of the grindstone displacement device changes the height of the grindstone. There was a problem in that the height of the grinding wheel had to be changed by turning the wheel, making it difficult to perform the grinding work.

Therefore, in an earlier application (Japanese Patent Application No. 1986-69597), we were able to achieve complete automation by equipping a grinding wheel raising mechanism and its return/lowering mechanism that gradually raises the position of the grinding wheel by a certain pitch each time the drill rotates a certain number of times. It is.

(Problem to be solved by the invention) However, if the drill diameter and web are within a certain range, grinding can be performed well, but when using a drill with a large diameter (for example, 30 mm), the grinding wheel must be centered around the drill axis in order to make a deep cut with the drill cutting edge. It is necessary to make a large horizontal movement towards.

In addition, in the previous grinding machine, the drill was positioned and the rotation angle of the drill was determined by placing the rear end of the drill bit against the blade abutment of the drill stopper.

However, there are various shapes of modern drill blades, such as those in which the trailing edge of the blade is not formed by curving sharper than the diameter of the drill body from the tip to the rear end, or the blade surface is swollen. There are things that are out there.

For this reason, it may not be possible to position the drill by placing the rear edge of the drill bit against the blade abutment as in the conventional technique.

(Means for Solving the Problems) Therefore, the present invention provides a conventional device with a mechanism that can adjust the horizontal movement of the grinding wheel, so that even a large drill can be deeply cut and ground, and the front edge of the drill bit can be moved to the blade abutment. By positioning it in contact with the drill, it is possible to grind regardless of the shape of the drill.

For this reason, the present invention provides a turntable equipped with a chuck device, a rotation device for the table, a second support member that is vertically movably supported by a first support member, and a guide member that supports the first support member. Therefore, the grinding wheel of the drill blade supported so as to be horizontally movable, the rotation device of the grinding wheel, and the rod connected to the horizontal movement cam provided on the table and whose rotation is connected to the rotation lever and the second support member. A horizontal mechanism that moves the grinding wheel back and forth horizontally through the cam, a vertical movement mechanism that moves the grinding wheel up and down in conjunction with a vertical movement cam installed on the table, and a vertical movement mechanism that moves the grinding wheel up and down little by little as the table rotates. In a drill grinding machine equipped with a grindstone raising mechanism, its return/lowering mechanism, and a drill stopper displacement mechanism operated by a solenoid and provided with a blade contact part for positioning the drill with a chuck, the position where the leading edge of the drill cutting edge comes into contact. A drill stopper is provided with a blade abutting part, and a positioning table stopper is provided which rotates in conjunction with the actuating member by the solenoid and locks on a part of the table, and the follower is horizontally rotated by contacting the horizontal movement cam. A transmission lever for transmitting horizontal rotation is interposed between the lever and a rotary lever connected to the rod of the second support member for transmitting horizontal motion to form a horizontal movement mechanism for the grindstone. The adjustment mechanism for displacing the operating position of the horizontal movement mechanism is connected to the horizontal movement mechanism.

(Operation) By pressing the power button, the grindstone rotates and the solenoid is energized, so that the drill stopper approaches the grindstone and is placed in the operating position. In this state, insert the drill vertically into the mounting hole in the center of the turntable and let the tip touch the drill stopper, and then rotate the drill slightly.The front edge of the drill bit will touch the blade abutment and the position will be established. It is. This determines the grinding start position of the drill bit. Further, as the drill stopper moves, the table stopper engages a portion of the table to set the initial rotational position of the table. Next, after tightening the chuck to hold the drill, when the operating button is pressed, the solenoid is demagnetized, the drill stopper is retracted, and the turntable is rotated.

As the table rotates, the horizontal movement cam also rotates, causing the grindstone to reciprocate horizontally to the axis of the drill and move up and down at right angles through connecting members such as levers and rods.

That is, during one rotation of the drill, the grindstone repeatedly moves horizontally and vertically according to the number of cutting edge surfaces of the drill to grind the blade. This operation is performed while the grindstone itself is gradually raised at a constant pitch by the grindstone raising mechanism as the drill rotates.

At this time, the horizontal reciprocation of the grindstone is performed by first swinging the follower lever by means of the horizontal movement cam, which is actuated by the transmission lever, and then via the rotation lever and rod.

If the drill has a large diameter, by changing the operating positions of the follower lever and the transmission lever using the adjustment mechanism, the amount of swing of the follower lever can be amplified and transmitted to the rotation lever, thereby reducing the horizontal movement of the grindstone. This allows the distance (cutting distance) to be increased, making it possible to grind large diameter drills.

When the table has rotated the set number of rotations and the drill has finished grinding, the grindstone automatically descends and returns to its initial position, waiting for the next drill grinding.

As described above, in the present invention, the leading edge of the drill cutting edge is positioned by the blade abutting portion of the drill stopper, and the table is also positioned, so that the grinding operation is performed from the leading edge of the cutting edge.

Furthermore, even large-diameter drills can be ground due to the ability to change the horizontal movement distance of the grindstone using the adjustment mechanism.

(Example) Hereinafter, details of the present invention will be described with reference to illustrated examples.

In Figures 1 and 2, 1 is a mechanical box;
A circular hole is formed in the center of the removable cover plate 2, and the turntable 3 is exposed from the hole. As shown in FIGS. 3 and 5, the turntable 3 has a shallow cylindrical shape with a bottom, and a support ridge 3a is provided inside the lower part of the outer peripheral wall thereof. As shown in FIG. 3, the support ridges 3a are loosely fitted into V-grooves of support rollers 4 provided at approximately equal intervals on the upper plate 1a of the box 1.
Thereby, the entire turntable 3 is supported rotatably around a vertical axis. A belt groove is provided on the outer peripheral wall of the turntable 3, and a V
A belt 5 is wrapped around it. The V-belt 5 has a pulley 6 placed at almost the same height as the belt groove.
When the pulley 6 is rotated by a table drive motor 7 fixedly installed inside the box 1, the turntable 3 is driven to rotate. That is, in this embodiment, the table drive motor 7, the pulley 6, and the V-belt 5 constitute a table drive device.

A dog 8 is fixed to the outer surface of the outer peripheral wall of the turntable 3, as shown in FIG.
Further, a limit switch 9 which is pressed and operated by the dog 8 is fixedly mounted on the upper plate 1a.
The dog 8 and the limit switch 9 constitute a table rotation speed detection device that detects the rotation speed of the turntable 3.

A claw support member 1 is provided on the back side of the turntable 3.
0 and a scroll gear 11 are provided (see FIG. 5). The claw support member 10 is provided with four grooves, in which four claws 12 are accommodated. One auxiliary pawl 13 is attached to one end of each pawl 12 so as to protrude upward from a drilled attachment hole in the center of the turntable 3.

Note that this auxiliary claw 13 can be omitted if the drill diameter is large and long. A protrusion is formed on the pawl 12, and this protrusion is inserted into a spiral groove formed on the lower surface of the scroll gear 11, and when the scroll gear 11 is rotated, this groove and the pawl are connected. The pawls 12 and the auxiliary pawls 13 are moved in the expansion or contraction direction by the guiding action of the protrusions 12. The scroll gear 11 meshes with a gear 14a fixed to the chuck handle 14, and is rotated by the operating force applied to the handle 14.

As shown in FIG. 3, a grinding wheel 15 and a drill stopper 16 are arranged below a chuck device consisting of a claw 12, a scroll gear 11, and a handle 14. The drill stopper 16 is rotatable around a shaft 17 supported vertically on the upper plate 1a, and has a blade abutment part 18, which prevents the drill stopper 16 from abutting against the front edge of the cutting edge of the tip of the drill. This serves to define the grinding start position of the drill. As shown in FIGS. 4 and 7, the rotation mechanism of the drill stopper 16 is such that a swing arm 21 is connected with a pin to a forward and backward shaft 20 operated by a solenoid 19, and one end of a swing plate 22 is attached to the other end of the arm 21. and a pin 23, and the rotary plate 22 is connected to rotate about the shaft 17 of the drill stopper 16 as a fulcrum. Note that the advance/retreat shaft 20 is always urged in the extrusion direction by a spring. Further, a transmission rod 24 is pin-coupled to the rotation plate 22, and a rotation arm 26 connected to the transmission rod 24 via a follow-up swinging member 25 is provided with a corrosive stopper 27 at the tip. A stopper 27 is made to protrude upward from the window hole 1b.

The disk-shaped grinding wheel 15 is made of diamond, and the axial center of the grinding wheel shaft 15a is parallel to the rotational axis of the turntable 3 and is positioned at right angles thereto, as shown in FIG. It is placed in a state where it can be used. The grindstone 15 is rotatably supported by a quill (first support member) 28 that is relatively movable in its axial direction (hereinafter referred to as the vertical direction), and the lower end that protrudes below the quill 28 is a pulley. 29, 30 and a flat belt 31, it is connected to a grindstone drive motor 32 fixed inside the machine case. While the belt 31 is marked as a detected part, as shown in FIG.
An optical sensor 33 attached to the lower surface of the upper plate 1a is disposed near the upper plate 1a, and the passage of the mark is detected by this optical sensor 33. That is, the rotation speed of the belt 33 is detected, and thereby the rotation speed of the grindstone 15 is indirectly detected.

The quill 28 is connected to the spindle housing (second
It is supported slidably up and down by a support member) 34. Further, as shown in FIG. 4, the spindle housing 34 is connected to the grinding wheel 15 by a support rail (guiding member) 35 fixed to the back surface of the upper plate 1a.
It is supported so as to be slidable in a horizontal direction perpendicular to the axis of the turntable 3, that is, the rotational axis of the turntable 3. That is, the grindstone 15 is movable vertically and horizontally by a grindstone support device including the quill 28, spindle housing 34, and rail 35. The quill 28 has a compressed coil spring 37 interposed between a locking plate 36 at its lower end and a locking protrusion of the spindle housing 34.
(see Figure 5).

On the other hand, as shown in FIG. 4, the spindle housing 34 is connected to the axis of the turntable 3 by means of a spring 39 interposed between the presser plate 38 fixed to the rail 35 and the spindle housing 35.
In other words, it is biased in the direction toward the axis of the drill. One end of a rod 40 is connected to this housing 34 as shown in FIG.
The other end is connected to an intermediate portion of a rotating lever 41 shown in FIG. The rotating lever 41 is the upper plate 1a.
A mounting member 43 whose lower end is rotatably supported by a bracket 42 fixed to and attached to its upper end
is projected onto the upper plate 1a. Mounting material 43
As shown in FIGS. 3 and 5, a pin 45 is fixed to the upper plate 1a via a screw rod member 44 for fine adjustment.
One end of an L-shaped transmission lever 46 rotatably connected to the upper plate 1 is coupled to the other end of the transmission lever 46.
It is located below an arm portion 48a of a follower lever 48 rotatably connected to a pin 47 fixed to a. A part of the following lever 48 has a roller 49 that comes into contact with a horizontal movement cam 86 protruding from the outer periphery of the table 3.
is provided. A transmission lever 46 operated by an arm portion 48a has an elongated hole 46a extending vertically therethrough, and an engagement pin 50 is inserted into the elongated hole 46a and projects downward from the elongated hole. The engagement pin 50 is provided to protrude from the lower surface of a movable plate 51 placed on the transmission lever 46, and a engraved rack 51a is connected to the pin 45.
It is provided in mesh with a pinion 45a provided in the.

Therefore, the rotation of the knob 52 fixed to the pin 45 causes the movable plate 51 to slide through the pinion rack, thereby displacing the position of the engagement pin 50. The transmission lever 46, movable plate 51, engagement pin 50, pinion rack, etc. constitute an adjustment mechanism.

On the other hand, a vertically movable cam 88 is fixedly installed below the horizontally movable cam 86 on the outer peripheral wall of the table 3, and a follower roller 53a disposed at one end of the swing lever 53 is in contact with this cam 88. . The transmission mechanism using the swing lever 53 has the same structure as the engagement structure of the transmission lever 46 and the movable plate 51.

That is, a movable plate 55 with a long hole 54a and a rack is placed on the transmission plate 54, and a pin 56 is placed on the transmission plate 54.
The movable plate 55 is moved by meshing the rack with the pinion provided on the
An engaging pin 57 protruding from the bottom surface of the tip of the movable plate 55 is disposed in the elongated hole 54a and projects downward, and the other end of the swinging lever 53 is transparently provided to the engaging pin 57. . As a result, by rotating the pin 56, the movable plate 55 slides and the position of the engagement pin 57 within the elongated hole 54a can be changed.

Reference numeral 58 denotes a grindstone drive lever, which is supported on a shaft 59 perpendicular to the axis of the grindstone so as to be movable up and down.
A contact bolt 58a is fixed upwardly at one end, and is brought into contact with the lower surface of the locking plate 36 of the quill 28, while a threaded portion 60 is provided at the other end, where the first transmission shaft 61 are screwed together. One end of the first transmission shaft 61 is connected to the tip of a rotating arm 63 as shown in FIGS. 4 and 5, and is pulled in the axial direction by the rotation of this arm 63. It's summery. The proximal end of the rotating arm 63 is fixed to a vertical shaft 64 .
4 has an upper end protruding above the upper plate 1a, and the transmission plate 54 is connected thereto with a pin 56.

As shown in FIG. 5, this first transmission shaft 61 is a grindstone correction (displacement)
It is also connected to a knob 65 via a connecting rod 66, and the rotation of this knob 65 also causes it to be pulled to the right in FIG.

On the other hand, a second transmission shaft 6 is attached to the other end of the first transmission shaft 61.
2 are connected so that they cannot rotate relative to each other and are movable relative to each other in the axial direction. One end of a spiral spring 67 is fixed to one end of the second transmission shaft 62, so that when the second transmission shaft 62 rotates the grindstone drive lever 58, elastic force is stored in the spiral spring 67. It's getting old. A bevel gear 68, a ratchet member 69, and a disc member 71 having a pin 70 are coupled to the second transmission shaft 62 by a key so as to rotate together with the second transmission shaft 62. The pin 70 of the disc member 71 fits into a groove (not shown) on an arc of the intermediate member 72 that is rotatable relative to the second transmission shaft 62, and when the second transmission shaft 62 is rotated, By moving this pin 70 along the groove, relative rotation between the second transmission shaft 62 and the intermediate member 72 is allowed. A protrusion (not shown) is formed on the intermediate member, and the protrusion is adapted to come into contact with the tip of the stopper bolt. The pin 70 and the stopper bolt serve as a stopper part for defining the original position of the second transmission shaft 62,
When these two are brought into indirect contact via the intermediate member 72, rotation of the second transmission shaft 62 in one direction is prevented.

The bevel gear 68 rotates around the rotating shaft 74 of the Geneva wheel 74 based on the biasing force of the coil spring 73.
It is meshed with a bevel gear 76 fixed to a. The Geneva wheel 74 is the turntable 3
It is arranged rotatably at a portion near the.

On the other hand, an engagement pin 7 is provided between the horizontal movement cam 86 and the vertical movement cam 88 on the outer peripheral wall of the turntable 14.
5 is fixed, and this engagement pin 75 is adapted to be engaged with the Geneva wheel 74.

At the front of the machine box 1, as shown in FIG. 1, a control device 79 including a microcomputer, a power switch 77, and an operating switch 78 are arranged. The control device 49 receives signals from a power switch 77, an operating switch 78, a limit switch 9, and an optical sensor 33 that detects the number of rotations of the grindstone, and the control device 79 controls the solenoid based on these signals. 19, controls the motors 7, 32, etc.

Next, the operation of this device will be explained along with the procedure of drill grinding work.

First, when the power switch 77 is pressed, the grindstone drive motor 32 is activated and the solenoid 19 is activated.
is excited and its advance/retreat shaft 20 is retracted, and the shaft 17 is rotated via the swing arm 21, so that the drill stopper 16 is rotated to the operating position. At the same time, the corrostopper 2 is transmitted via the transmission rod 24, etc.
7 rotates and engages with the notched groove 3b formed on the lower surface of the table 3 to position and stop the table 3.

In this state, the drill is vertically inserted into the drill mounting hole at the center of the turntable 3, and its tip is brought into contact with the drill stopper 16. Then, when the drill is rotated slightly by hand, the front edge of the drill cutting edge comes into contact with the blade abutment part 18, and the grinding start position of the drill is determined.

Next, when the chuck handle 14 is rotated, the scroll gear 11 is rotated and the claws 12 are moved to grip and fix the drill from all sides.

Next, the number of times of grinding (specifically, the number of rotations of the table for rough cutting) that determines the amount of grinding of the drill is input numerically, and then the operation switch 78 is pressed. Then, the solenoid 19 is demagnetized and the forward/backward shaft 20 is pushed out, and at the same time, the drill stopper 16 and the blade abutment part 18 are retracted to a position where they do not interfere with the cutting edge of the drill, and the claw member (not shown) is engaged with the ratchet member 69. engaged with the teeth. At the same time, the table drive motor 7 is operated in response to a command from the control device 79, and the turntable 3 is rotationally driven.

When the table 3 rotates, the vertically moving cam 88 and the horizontally moving cam 86 also rotate. When the horizontal movement cam 86 is rotated, the lever 48 is rotated via the follower roller 49, and the movement is caused by the engagement pin 50, the movable plate 51, the transmission lever 46, and the mounting member 43.
is transmitted to the rotation lever 41 via the rod 40, and is further transmitted to the spindle housing 34 via the rod 40, so that the grinding wheel 15 is reciprocated in the horizontal direction in conjunction with the action of the spring 39.

Further, when the vertical movement cam 88 is rotated, the lever 53, the engagement pin 57,
It is transmitted to the transmission plate 54 and further converted into a rotational movement of the vertical shaft 64 and the rotational arm 63, and then the first transmission shaft 6
1 is reciprocated in the axial direction. First transmission shaft 6
1 is reciprocated, the grindstone drive lever 58 is rotated around the shaft 59, and the abutment bolt 58a
acts on the locking plate 36 and thereby the grinding wheel 1
5 are interlocked in reciprocation up and down.

In this way, as the table 3 rotates, the horizontal moving cam 8
6. As the vertical movement cam 88 changes the rotation angle, the grinding wheel 15 reciprocates twice during one rotation of the drill while maintaining organic linkage in the horizontal direction and the vertical direction.

As a result, the clearance angle from the cutting edge at the tip end of the drill and the thinning of the cheesel part are simultaneously applied. Note that, in order to perform similar grinding on the two cutting edges of the cutting edge at the tip of the drill, the grindstone 15 continuously repeats the same movement twice during one revolution of the drill.

Furthermore, when the turntable 3 rotates, the engagement pin 75 comes to engage with the Geneva wheel 74 at a certain angular position. Furthermore, when the table 3 rotates, the Geneva wheel 74 is also rotated, and the engagement pin 75 separates from the Geneva wheel 74 at a certain position, at which point the Geneva wheel 74 stops rotating. The rotation of the Geneva wheel 74 is transmitted to the second transmission shaft 62 via the bevel gears 68 and 76, and the second transmission shaft 62 is rotated together with the first transmission shaft 61. Then, the grindstone drive lever 58 screwed onto the first transmission shaft 61 is rotated by the screw feeding action at the threaded portion with the first transmission shaft 61,
The contact bolt 58a is connected to the quill 28 via the locking plate 36.
is pushed up a certain amount against the biasing force of the coil spring 37. That is, the Geneva wheel 7 is rotated intermittently every time the turntable 3 rotates.
The grinding wheel 15 is pushed upward little by little according to the amount of rotation of the grinding wheel 4, thereby increasing the length of cut into the drill.

When the grinding wheel 15 rises by a predetermined amount, in other words, when the turntable 3 rotates by the input set rotation speed, the solenoid 19 is activated by a command from the control device 79, and the bevel gears 68 and 76 are activated. They are separated against the biasing force of the spring 73. That is, Geneva wheel 74
The clutch that transmits and interrupts motion between the second transmission shaft 62 and the second transmission shaft 62 is disconnected, and the operational connection between the two is severed. After this, the grinding wheel 15 does not rise and only the finishing rotation of the drill is performed, and the number of rotations is set to a predetermined number (for example, 2
When the number of rotations (times) is reached, a command is issued from the control device 79 to stop the table drive motor 7, and at the same time, the solenoid 19 is energized. Then, the drill stopper 16 is returned to the working position for the next time, and the table stopper 27 is rotationally engaged with the notch groove 3b of the table 3, so that the turntable 3 is stopped at a predetermined position. At the same time, the claw member and the ratchet member 69 are disengaged. As a result, the second transmission shaft 62 and the first transmission shaft 61 are rotated in the opposite direction by the restoring force stored in the spiral spring 67, and the grinding wheel 15 is lowered and returned to the initial position. be.

Then, after rough cutting and finishing cutting of the drill are completed, the drill is replaced, and grinding is performed again with a new drill.

During this period, if there is an abnormality in the rotational speed of the grinding wheel 15 detected by the sensor 33 (for example, when the rotational speed has decreased by 20% or more), the turntable 3 is automatically activated by a command from the control device 79. be stopped. Abnormalities may occur in the rotational speed of the grinding wheel 15, for example, if the flat belt 31 stretches due to fatigue and slips between the pulleys 29 and 30, or if a load exceeding the set value is applied to the grinding wheel drive motor 32. In some cases, the grindstone drive motor 32 may overheat and the rotation speed may drop.

In this way, in this device, the grinding wheel 15 automatically rises according to the amount of rotation of the turntable 3, and automatically stops rising at the desired position, so anyone can use it without any skill and without the need for a drill. It is possible to precisely re-grind and thin the amount.

The feature of this example is that when setting the drill, the leading edge of the drill bit comes into contact with the blade abutment part 18 of the drill stopper 16 and is positioned.
The stopper 27 engages with the cutout groove 3b provided on the lower surface of the table 3 through the operating member of the solenoid 19 that operates the table 3, thereby positioning the table 3 to stop. This makes it possible to reliably search from the leading edge of the cutting edge. Furthermore, the horizontal movement distance of the grindstone 15 can be adjusted by arbitrarily changing the rotation distance received by the follower lever 48 for starting the roller 49 by following the horizontal movement cam 86. That is, by lifting the knob 52 slightly upward and rotating the pinion 45a so that it meshes with the rack 51a, the movable plate 51 is moved via the pinion rack, and by changing the position of the engagement pin 50, it is engaged with the follower lever 48. Matching pin 5
0 contact changes, the amount of rotation of the transmission lever 46 changes, and thereby the amount of movement of the rod 40 also changes, so the horizontal movement distance of the grindstone 15 can be changed.

Similarly, by turning the pin 56, the movable plate 55 can be moved and the engagement pin 57 can be displaced.
It is also possible to change the vertical movement distance of the grindstone 15 by changing the contact point 7.

Although this example is configured as described above, the present invention is not limited to this. For example, the mechanism for displacing the drill stopper to the operating position does not matter, and the configuration of the blade rest does not matter either. Further, the structure of the stopper for stopping and positioning the table is also appropriate.

Furthermore, an adjustment mechanism that can be connected to the horizontal movement mechanism of the grinding wheel and that can displace the following lever and the transmission action position is also optional, and as shown in Fig. 9, the engagement pin is inserted into the transmission lever with many arrangement holes in permuted abutment. Alternatively, although not shown in the drawings, it may be configured such that a screw that has been screwed is loosened and a movable plate having an engagement pin is slid and tightened.

Note that the configurations of the first support member, second support member, and guide member that support the grindstone are not limited either. Furthermore, the vertical movement mechanism for vertically moving the grindstone and the mechanisms for raising and lowering the grindstone are not limited.

(Effects of the Invention) According to the present invention, since the operating amount of the follower lever that rotates due to the rotation of the horizontal cam can be changed by the adjustment mechanism and transmitted to the rotation lever, the horizontal movement distance of the grinding wheel can be adjusted. This has the effect of being able to perform grinding according to the diameter.

Furthermore, since the leading edge of the drill bit can be positioned by contacting the blade abutment and the table can also be positioned, it is possible to reliably grind from the leading edge of the cutting edge, and there is an advantage that even drills with different shapes of the cutting edge surface can be ground.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is a plan view, Figure 3 is a plan view with the cover plate removed, Figure 4 is a bottom view with the bottom plate removed, Figure 5 is a sectional view of Figure 2, and Figure 6 is a cross-sectional view of Figure 2.
The figure is a sectional view of FIG. 2, FIG. 7 is an enlarged vertical sectional view of the main part showing the operation of the drill stopper and table stopper, and FIG. 8 is an enlarged vertical sectional view of the main part of the adjustment mechanism linked to the horizontal mechanism. 9 are plan views showing another example of the adjustment mechanism. 3: table, 7: table drive motor, 1
5: Grindstone, 16: Drill stopper, 18: Blade rest, 19: Solenoid, 27: Stopper, 32:
Grinding wheel drive motor, 35: rail, 40: rod,
41: Rotating lever, 46: Conduction lever, 48: Follow-up lever, 49: Roller, 50: Engagement pin, 52:
Knob, 77: Power switch, 78: Operation switch, 79: Control device, 86: Horizontal movement cam, 88:
Vertical movement cam.

Claims (1)

[Scope of Claims] 1. A turntable equipped with a chuck device, a rotation device for the table, and a second turntable that is vertically movably supported by a first support member and that supports the first support member.
The grinding wheel of the drill blade supported horizontally by the support member and the guide member, the rotation device for the grinding wheel, and the horizontal movement cam provided on the table are connected to each other, and the rotation thereof is controlled by the rotation lever and the 2. A horizontal mechanism that moves the grinding wheel back and forth horizontally via a rod connected to a support member, a vertical movement mechanism that moves the grinding wheel up and down in conjunction with a vertical movement cam provided on the table, and a vertical movement mechanism that moves the grinding wheel up and down as the table rotates. In a drill grinding machine, the drill grinding machine is equipped with a grinding wheel raising mechanism and its return/lowering mechanism that gradually raises the grinding wheel, and a drill stopper displacement mechanism that is operated by a solenoid and is provided with a blade abutment that positions the drill with a chuck.
The drill stopper is provided with a blade abutting portion at a position where the front edge of the drill bit comes into contact, and a positioning table stopper is provided that rotates in conjunction with the operating member by the solenoid and locks on a part of the table, and the horizontally movable cam A transmission lever that transmits horizontal rotation is interposed between a follower lever that contacts the rod and rotates horizontally, and a rotation lever that is connected to the rod of the second support member and transmits horizontal motion, thereby creating a horizontal movement mechanism for the grindstone. A small drill grinding machine characterized in that an adjustment mechanism capable of displacing the operating positions of a follower lever and a transmission lever is linked to a horizontal movement mechanism. 2. Bring the opposite arm of the follower lever, which has a roller at one end that contacts the horizontal movement cam, into contact with the engagement pin on one side of the transmission lever, and rotate the knob to push the engagement pin through the rack and pinion. A drill grinding machine according to claim 1, wherein the adjustment mechanism is a displacement mechanism.