JPH0333418Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a dressing device for forming a grindstone.

Conventional technology Conventionally, a grindstone dresser has been used to form a grindstone, and such a grindstone dresser holds multiple types of diamond tools in a holding hole formed in a holder so that they can move forward and backward. There are some that are used selectively as needed. In addition, during the grindstone forming operation, the diamond tool used is fixed in a protruding state, and other diamond tools that are not used are fixed in a standby state pushed into the deep part of the holding hole.

Here, the diamond tool inserted into the holding hole is fixed by tightening with a fixing screw. Further, the change from the standby state to the protruding state is performed by loosening the fixing screw, pulling out the diamond tool by hand, and tightening the fixing screw again.

Problems to be Solved by the Invention Since the change from the standby state to the protruding state is performed by manually pulling out the diamond tool, this operation is time-consuming. In particular, as diamond tools become smaller, it becomes more labor-intensive.

Further, as the fixing screw is repeatedly tightened and fixed, the outer circumferential surface of the diamond tool is scratched, and the damaged portion bulges out. Then, the bulging portion comes into contact with the inner circumferential surface of the holding hole, making it impossible to smoothly insert and remove the diamond tool when changing between the standby state and the protruding state.

Means for Solving the Problem A plurality of holding holes are formed in the holder, and springs are provided at the bottoms of these holding holes. A protruding position engaging part and a standby position engaging part are formed on the outer circumferential surface of the grindstone forming tool to be inserted into the holding hole, and a resilient body and an engaging part are formed to elastically engage with these engaging parts. The holder is provided with a fixing screw that engages and fixes the grindstone forming tool.

Function: When the grindstone forming tool is inserted into the holding hole, the resilient body engages with the protruding position engaging portion or the standby position engaging portion to determine the insertion position. By engaging and tightening the fixing screw with the protruding position engagement part, the grindstone forming tool is fixed in the protruding state, and by engaging the fixing screw with the standby position engaging part and tightening, the grindstone forming tool is fixed in the standby state. be done. When the fixing screw is engaged with the protruding position engaging part or the standby position engaging part and tightened,
Although the portion tightened by the fixing screw bulges out, the bulge portion does not come into contact with the inner peripheral surface of the holding hole, allowing smooth insertion and removal of the grindstone forming tool.

Embodiment An embodiment of this invention will be described based on FIGS. 1 to 6. First, a base block 1 is provided, which is placed on the table surface of a machine tool, etc., and a highly precisely finished sliding groove 2 is formed along the longitudinal direction on the top surface of the base block 1. There is. This sliding groove 2 has a sliding part 3 and a rotating part 4.
A pair of movable blocks 5 and 6 are slidably mounted. A support shaft 7 having an axis perpendicular to the sliding direction of the movable blocks 5 and 6 is attached to the sliding portion 3, and the rotating portion 4 rotates around the axis of the support shaft 7. Connected for free movement. A fixing screw hole 8 is formed in the rotating part 4, and the tip of the fixing screw hole 8 is brought into contact with the outer circumferential surface of the support shaft 7, so that the rotating part 4 can be fixed.
A fixing screw 9 is screwed together to fix the rotational movement. Incidentally, an inclination angle adjustment shaft 10 is fixed to the side surface of the rotary portion 4 at a position separated from the support shaft 7 by a predetermined distance and has an axis parallel to the support shaft 7. A pair of presser covers 11 are fastened to the upper surface of the base block 1 with screws 12 to prevent the movable blocks 5 and 6 from slipping out of the sliding grooves 2. Furthermore, side plates 13 are screwed to both ends of the base block 1 in the longitudinal direction.

Next, threaded holes 14 are formed in the lower parts of the sliding parts 3, and a right-handed thread cut on a threaded rod 15 is screwed into the threaded holes 14 of one sliding part 3, and A threaded rod 15 is inserted into the threaded hole 14 of the sliding part 3.
The left-hand thread cut into the hole is screwed together. One end of the threaded rod 15 passes through one of the side plates 13, and a knob 16 for rotating the threaded rod 15 is fixed to the end of the threaded rod 15 that projects outward from the side plate 13. A scale 17 is engraved on the outer peripheral surface of the knob 16 to indicate the amount of sliding of the movable blocks 5, 6 when the knob 16 is rotated.

Next, the rotating part 14 has a support shaft 18 having an axis aligned in the sliding direction of the movable blocks 5 and 6.
are rotatable around the axis and are supported through the rotating portion 4, and disk-shaped holders 19 are integrally formed at mutually opposing ends of these support shafts 18, respectively. Fitting holes 20 are formed in the rotation centers of these holders 19, and the ends of universal joints 21 that connect the pair of holders 19 integrally and rotatably are removably fitted into these fitting holes 20. ing. Note that a spring 22 is inserted into the bottom of the fitting hole 20 to urge the universal joint 21 to an intermediate position between the pair of holders 19. Note that a retainer 23 is fixed to the other end of the support shaft 18 to prevent the support shaft 18 from falling off from the rotating portion 4, and one retainer 23 has the holder 19 fixed thereto. A handle 24 is connected to the handle 24 for rotational operation.

Here, six holding holes 25 are formed on the opposing surfaces of the holder 19 at equal intervals apart from the center of rotation of the holder 19 by a predetermined distance and located on the same circumference. A spring 26 is inserted into the bottom. Moreover, the holder 1
A ball pressing body 27 which is a resilient body is attached to the ball pressing body 9 so as to face the inner circumferential surface of the holding hole 25, and a ball 28 that can freely move in and out in a direction perpendicular to the center line of the holding hole 25 is attached to the ball pressing body 27. A spring 29 is provided to bias the ball 28 toward the holding hole 25. Further, a screw hole 30 is formed in the holder 19 at a position facing the ball pressing body 27, and a fixing screw 31 is screwed into the screw hole 30.

Next, a diamond tool 32, which is a grindstone forming tool, is inserted into the holding hole 25 and has a diamond fixed to its tip.
The outer peripheral surface of the diamond tool 32 includes a standby position engagement groove 33 which is a standby position engagement part located approximately at the center of the diamond tool 32 and a protruding position engagement part located at the rear end side of the diamond tool 32. A protruding position engagement groove 34 is formed. Note that the standby position engagement groove 33 is formed wider than the protrusion position engagement groove 34. Further, there are a plurality of types of diamond tools 32 depending on the shape of the diamond fixed to the tip, etc., and different types of diamond tools 32 are inserted into each holding hole 25 of the holder 19.

In such a configuration, each holding hole 25 of the holder 19 is equipped with a different type of diamond tool 3.
2 is inserted and fixed, each diamond tool 32 is inserted deep into the holding hole 25, the ball 28 of the ball pressing body 27 is elastically engaged with the standby position engagement groove 33, and the fixing screw 31 is inserted and fixed. is engaged with the standby position engagement groove 33, and this diamond tool 32
is tightened and fixed. Here, in one molding process, a predetermined type of diamond tool 32 is used.
The diamond tool 32 used is set in a protruding state that protrudes from other diamond tools 32.

When setting the diamond tool 32 to the protruding state, first loosen the fixing screw 31 that tightens and fixes the diamond tool 32 to be used.
The diamond tool 32 is pulled out toward the outside of the holding hole 25. Diamond tool 32 is spring 2
6, and the diamond tool 32 can be easily pulled out. Further, during this pulling out, the balls 28 of the ball pressing body 27 enter the main body side of the ball pressing body 27 and do not interfere with the pulling out. And ball 28
When facing the protruding position engaging groove 34, the spring 29 pops out due to the urging force of the spring 29 and the protruding position engaging groove 34
is resiliently engaged. Therefore, positioning of the diamond tool 32 in the protruding state can be easily performed. The outward drawing is stopped at the position where the ball 28 engages with the protruding position engagement groove 34, and the fixing screw 31 is tightened. The fixing screw 31 is engaged with the protruding position engaging groove 34, and the setting of the protruding state of the diamond tool 32 is completed.

Here, when the fixing screw 31 is tightened, the standby position engagement groove 33 and the protrusion position engagement groove 34 are scratched and the corresponding portions bulge, but this is a bulge within the engagement grooves 33 and 34. Therefore, the swollen part is the holding hole 2.
5 is prevented from hitting the inner peripheral surface. Therefore, the diamond tool 32 can be moved in and out of the holding hole 25 smoothly. Furthermore, the standby position engagement groove 33 is formed wider than the protrusion position engagement groove 34;
This is because high precision is not required for the fixing position when fixing the diamond tool 32 in the standby state, and the fixing operation of the diamond tool 32 in the standby state can be easily performed.

After the diamond tool 32 to be used has been set in the protruding state, the opposing holders 19 are connected by the universal joint 21 so that they rotate together, and the grindstone 35 attached to the rotating shaft of the machine tool is inserted between the holders 19. Position it in the middle. Next, the knob 16 is turned to slide the movable blocks 5 and 6 closer to each other, and the tip of the diamond tool 32 set in the protruding state is brought into contact with both sides of the grindstone 35. Then, by rotating the rotating shaft of the machine tool and turning the handle 24 to integrally rotate the pair of holders 19, both sides of the grindstone 35 are formed simultaneously.

When forming with another diamond tool 32 after forming with one diamond tool 32, the used diamond tool 32 is pushed deep into the holding hole 25 and fixed in a standby state, and the other diamond tool 32 to be used is pulled out. Fixed in a protruding state.

Next, when the side surface of the grindstone 35 to be formed is an inclined surface, the rotating part 4 is rotated around the axis of the support shaft 7 to adjust the inclination angle of the rotating part 4. As shown in FIG. 3, when the holders 19 are inclined so as to face each other in a substantially V-shape, a grindstone 35 having a thick outer peripheral width is formed, and the holders 19 are made to face each other in an inverted V-shape. If the grinding wheel is inclined to , a grindstone with a thin outer circumferential width will be formed. In addition, the left and right rotating parts 4
By setting the inclination angles of the rotating parts 4 to be equal, a symmetrical whetstone can be formed, and by setting the inclination angles of the rotating parts 4 to different angles as necessary, a whetstone with one side being straight and the other side being inclined can be formed. be done.

Here, the inclination angle adjustment of the rotating part 4 will be specifically explained. First, as shown in FIG.
A block gauge 36 of a predetermined height dimension is placed on the block gauge 1, and the rotating part 4 is rotated around the axis of the support shaft 7 to bring the inclination angle adjustment shaft 10 into contact with the upper surface of the block gauge 36. . At this time, on the straight line connecting the axial center of the support shaft 7 and the axis of the inclination angle adjustment shaft 10, the distance L between the axial center O of the support shaft 7 and a point A on the outer peripheral surface of the inclination angle adjustment shaft 10. is maintained constant. Furthermore, on the perpendicular line passing through the axis O, the distance _l1 from the axis O to the point B on the upper surface of the presser cover 11 is always constant, and the distance l1 from the point B on the upper surface of the presser cover 11 to the upper surface of the block gauge 36 is always constant. The distance _l2 to point C is determined by the height dimension of the block gauge 36 used. here,
In the right triangle AOC, the relationship cos θ = l ₁ + l ₂ /L is obtained, and by selecting the height dimension of the block gauge 36 to be used, the inclination angle θ of the rotating part 4 can be adjusted.
is determined. After adjusting the angle, tighten the fixing screw 9 to fix the rotating part 4 at the set inclination angle.

Next, a second embodiment of this invention will be explained based on FIG. 7. In addition, the same parts as those explained in FIGS. 1 to 6 are indicated by the same reference numerals.
Explanation will also be omitted. The leading and rear ends of the diamond tool 37, which is a grindstone forming tool inserted into the holding hole 25, are formed into large diameter portions 38 having an outer diameter that is approximately the same as the inner diameter of the holding hole 25. A small diameter part 39 is formed between these large diameter parts 38 and is a standby position engagement part whose diameter is slightly smaller than the outer diameter of the large diameter part 38. Further, a protruding position engagement groove 34 whose diameter is smaller than the outer diameter of the small diameter portion 39 is formed between the rear end side of the small diameter portion 39 and the large diameter portion 38 on the rear end side.

In such a configuration, in a standby state in which the diamond tool 37 is pushed deep into the holding hole 25, the ball pressing body 27 and the fixing screw 31 engage with the small diameter portion 39, and the diamond tool 37
is tightened and fixed in the standby state.

Next, when setting the diamond tool 37 in the protruding state, the fixing screw 31 is loosened and the diamond tool 37 is pulled out of the holding hole 25. At this time of withdrawal, the ball pressing body 27
The ball 28 slides relatively along the small diameter portion 39 while maintaining a small protruding state due to the biasing force of the spring 29, and when it faces the protruding position engaging groove 34, it protrudes largely and engages the protruding position engaging groove 34. engage with. Therefore, in combination with the fact that the diamond tool 37 is urged outward by the spring 26, the operation of pulling out the diamond tool 37 to the protruding position can be made much easier. Then, the outward drawing of the diamond tool 37 is stopped at the position where the ball 28 engages with the protruding position engagement groove 34, and the setting of the diamond tool 37 in the protruding state is completed by tightening the fixing screw 31.

Effects of the invention This invention provides a spring at the bottom of the holding hole as described above, which makes it easy to pull out the grindstone forming tool from the holding hole and bring it into the protruding state. Since the elastic body elastically engages with the protruding position engaging part and the standby position engaging part when inserting and removing the grindstone, the grindstone forming tool can be easily positioned, and the fixing screw can be tightened. Although a bulging portion is formed in the engaging portion when the engagement portion is pressed, the bulging portion does not come into contact with the inner peripheral surface of the holding hole, and has the effect that the grindstone forming tool can be smoothly inserted and taken out.

[Brief explanation of drawings]

Figures 1 to 6 show the first embodiment of this invention; Figure 1 is a front view, Figure 2 is a side view, and Figure 3 is a working state in which the rotating part is tilted at a predetermined angle θ. FIG. 4 is an explanatory diagram showing how the tilt angle of the rotating part is adjusted using a block gauge;
Fig. 5 is an enlarged front view showing the diamond tool fixed in the standby state, Fig. 6 is an enlarged front view showing the diamond tool fixed in the protruding state, and Fig. 7 is the second diagram of this invention. FIG. 2 is an enlarged front view showing a diamond tool in an example. 19... Holder, 25... Holding hole, 26... Spring, 7
...Ball pressing body (elastic body), 31...Fixing screw, 3
2...Diamond tool (grindstone forming tool), 33...
Standby position engagement groove (standby position engagement part), 34...Protrusion position engagement groove (standby position engagement part), 37...Diamond tool (grindstone forming tool), 39...Small diameter part (standby position engagement part).

Claims (1)

[Scope of utility model registration request] A plurality of holding holes are formed in the holder, springs are provided at the bottoms of these holding holes, and a protruding position engaging part and a standby position engaging part are formed on the outer peripheral surface of the grindstone forming tool to be inserted into the holding holes. and a dressing device characterized in that the holder is provided with an elastic body that elastically engages with the engagement portion and a fixing screw that engages with the engagement portion and fixes the grindstone forming tool. .