JPH031173Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a diamond tool mounting structure for a grindstone dresser.

BACKGROUND ART Conventionally, a grindstone is generally shaped using a grindstone dresser. The structure of such a grindstone dresser is that a support body is attached to a support block whose inclination angle can be freely adjusted with respect to the grindstone attached to a machine tool so that it can slide vertically, and a diamond tool is inserted into a mounting hole formed in this support block. Generally, it is inserted and fixed by tightening with fixing screws, etc. When replacing the diamond tool, the fixing screw is loosened, the diamond tool is removed from the mounting hole, another diamond tool is inserted into the mounting hole, and the fixing screw is tightened again.

Problems that the invention aims to solve: The outer diameter of the diamond tool and the inner diameter of the mounting hole are set to be approximately equal, and the diamond tool is mounted with its outer circumferential surface in close contact with the inner circumferential surface of the mounting hole. . For this reason, if the diamond tool is tightened and fixed with grindstone shavings or the like getting into the inner circumferential surface of the mounting hole, it is very time consuming to remove the diamond tool from the mounting hole.

Means for solving the problem A mounting hole is formed into which a diamond tool is inserted and mounted in a support movably attached to a support block, and the diamond tool mounted in this mounting hole is inserted into the mounting hole by a fixing means. fixed,
A spring is attached to the bottom of the mounting hole to bias the diamond tool in the direction of removal from the mounting hole with a force above a certain level. Here, "force above a certain level"
is a force sufficient to assist in removing the diamond tool from the mounting hole if the removal becomes difficult.

Function The diamond tool installed in the mounting hole is biased in the removal direction by a spring, and when removing the diamond tool from the mounting hole when replacing the diamond tool, etc., it can be easily removed with a small amount of force. Ru. Note that the diamond tool is fixedly attached to the support body by the fixing means against the biasing force of the spring. Therefore,
The spring does not have a significant effect on the grinding operation of the diamond tool, and there is no need to be delicate in setting the spring strength.

Embodiment A first embodiment of this invention will be described based on FIGS. 1 to 4. First, a base block 1 is provided, which is placed on a 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 this base block 1. . This sliding groove 2 has a sliding part 3 and a rotating part 4.
A pair of movable blocks 5 and 6, which are supporting blocks, are slidably mounted. Here, a groove having a substantially semicircular cross section is formed in the upper end surface of the sliding portion 3, and a cylindrical support shaft 7 is fixed to this groove. On the other hand, a groove having a substantially semicircular cross-section that slides into the upper half of the support shaft 7 is formed on the lower end surface of the rotating portion 4 . Further, a substantially L-shaped support member 8 is fixed to both sides of the rotating part 4, and an end of the support shaft 7 is rotatably inserted into a support hole 9 formed in the support member 8. Thereby, the rotating part 4 is connected to the sliding part 3 so as to be rotatable about the axis of the support shaft 7. Note that one support member 8 fixed to one side of the rotating part 4 has a fixing part (not shown) for fixing the rotating part 4 at any position rotated around the axis of the support shaft 7. The other supporting member 8 fixed to the other side of the rotating part 4 is provided with a substantially horizontally extending extending part tip for adjusting the inclination angle of the rotating part 4. The adjustment shaft 10 is fixed. Note that a straight line that serves as both a tangent to the support shaft 7 and a tangent to the adjustment shaft 10 is perpendicular to the center line of the rotating portion 4 passing through the center of 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 fixed to both ends of the base block 1 in the longitudinal direction.

A screw hole 14 is formed in each of the sliding parts 3, and a right-handed thread cut on a threaded rod 15 is screwed into the screw hole 14 of one sliding part 3, and a right-hand thread cut on a threaded rod 15 is screwed into the screw hole 14 of one sliding part 3. A left-handed thread cut into a threaded rod 15 is screwed into the threaded hole 14. One end of the threaded rod 15 passes through one of the side plates 13, and the end of the threaded rod 15 protrudes outward from the side plate 13.
A knob 16 that rotates the knob 5 is fixed.
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 as the knob 16 is rotated.

Next, the rotating part 4 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 part 4, and disk-shaped rotating bodies 19, which are supports, are integrally attached to mutually opposing ends of these support shafts 18. It is formed. Fitting holes 20 are formed in the center of rotation of these rotating bodies 19, and a pair of rotating bodies 1 are inserted into these fitting holes 20.
An end portion of a universal joint 21, which is a connecting body that connects the parts 9 integrally and rotatably, is removably fitted. 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 rotating bodies 19. Note that a retaining body 23 for preventing the supporting shaft 18 from falling off from the rotating portion 4 is fixed to the other end of the spindle 18, and one of the retaining bodies 23
A handle 24 for rotating the rotating body 19 is connected to the handle 24 .

An inclined hole 25, which is a mounting hole, is formed on the opposing surfaces of the rotating body 19 at a position separated by a predetermined distance from the center of rotation of the rotating body 19.
A diamond tool 26 is inserted into each of the holes, and each of the diamond tools 26 is secured by a tap screw 27 serving as a fixing means. Note that the diamond tool 26 of one rotating body 19 and the diamond tool 26 of the other rotating body 19 are arranged to face each other with a predetermined angle shift. A spring 28 is attached to the bottom of the inclined hole 25 to bias the diamond tool 26 in the direction of removal from the inclined hole 25.

In such a configuration, first, when the side surface of the grindstone is an inclined surface inclined at an angle θ with respect to the vertical plane, the rotating part 4 is moved to the axis of the support shaft 7 according to the inclination angle θ of the side surface of the grindstone. The inclination angle of the rotating part 4 is adjusted by rotating the rotating part 4 in the following directions. To adjust the inclination angle of the rotating part 4, as shown in FIG. Adjustment axis 1 by rotating it around the axis.
This is done by bringing 0 into contact with the upper surface of the block gauge 30.

To explain this adjustment specifically, the spindle 7
The rotating part 4 is tilted at an angle θ with respect to the perpendicular line around the axis of the support shaft 7 from a position where the common tangent line a between the axis and the adjustment shaft 10 is horizontal, and the block gauge 30 is placed on the mounting part 29. The outer circumferential surface of the adjusting shaft 10 is brought into contact with the upper surface of the adjusting shaft 10. At this time, point A on support shaft 7 and adjustment shaft 1
The distance L between the abutment point B and the block gauge 30 on 0 is maintained equal to the distance between the axis of the support shaft 7 and the axis of the adjustment shaft 10. If the intersection of the perpendicular drawn from point B and line a is C, then in triangle ABC,
AB=L, BC=l (l is the value obtained by subtracting the distance between the mounting portion 29 and line a from the height of the block gauge 30). And ∠BAC=θ,
From the relationship sin θ=l/L, the angle θ is determined by selecting the height dimension of the block gauge 30 to be used.

Perform the same adjustment on both rotating parts 4,
The inclination angles of both rotating parts 4 with respect to the vertical plane are both θ
Set to . Thereby, the rotating parts 4 are opposed to each other in an inverted V-shape, and the fixing parts are tightened and fixed, thereby fixing the rotating parts 4 at the set inclination angle θ. Next, the diamond tool 26 is attached to the inclined hole 25 of the rotating body 19, and both rotating bodies 19 are connected by the universal joint 21 so that they rotate together. In addition, at this time, the diamond tool 26
The rotating bodies 19 are connected to each other at a position where their tips do not face each other.

Next, a grindstone with left and right sides parallel to each other, which is attached to the machine tool, is positioned at an intermediate position between the left and right rotating bodies 19, and the handle 24 is turned to rotate the rotating body 19, and the knob 16 is turned to rotate the movable block 5. , 6 in the direction toward each other. As the handle 24 is rotated, the angle θ with respect to the vertical plane
The tip of the diamond tool 26, which rotates in an inclined locus circle, first comes into contact with the outer periphery of the lower end of the grindstone and grinds it, and as the movable blocks 5 and 6 are fed in the direction closer to each other, the grinding area increases. spread. Then, by rotating the tip of the diamond tool 26 while drawing a trajectory circle inclined at an angle θ with respect to the vertical plane, both side surfaces of the grindstone are formed into inclined surfaces inclined at an angle θ with respect to the vertical plane.

As the movable blocks 5 and 6 are brought closer together, the area of the flat part of the outer periphery of the grinding wheel becomes narrower, and eventually the trajectory circle drawn by the tip of the diamond tool 26 attached to one rotating body 19 and the circle attached to the other rotating body 19 become smaller. The locus circle drawn by the tip of the diamond tool 26 intersects at the outer periphery of the grindstone, and the periphery of the grindstone is formed at an acute angle. In addition, when the locus circles drawn by the tips of the diamond tools 26 intersect with each other, since the diamond tools 26 face each other with a predetermined angle shifted from each other, interference with each other is prevented. In this way, a grindstone with an acute peripheral edge can be formed easily and in a short time. Moreover, diamond tool 2
This is processing by rotating 6 in a plane,
A smooth finish is obtained on both sides of the whetstone without any difference in level. Further, since the handle 24 can be rotated at a position away from the grindstone, there is no risk of an accident in which the user's hand hits the rotating grindstone.

Next, when replacing the diamond tool 26 with another diamond tool 26, loosen the tap screw 27, remove the diamond tool 26 from the inclined hole 25, and replace the diamond tool 26 with another diamond tool 26.
Insert it and tighten the tap screw 27 again to fix it. Here, since the diamond tool 26 is biased by the spring 28 in the direction of removal from the inclined hole 25, the diamond tool 26 can be easily removed from the inclined hole 25.

Next, a second embodiment of this invention will be explained based on FIG. In addition, the same parts as those explained in FIGS. 1 to 4 are indicated by the same reference numerals.
Explanation will also be omitted. A support body 3 is attached to a support block 31 whose angle can be freely adjusted with respect to the table surface of a machine tool, etc.
2 is attached so as to be slidable in the vertical direction, and a mounting hole 33 into which the diamond tool 26 is inserted and fixed is formed in the surface of the support 32 facing the grindstone. A spring 28 is attached to the bottom of the mounting hole 33 for biasing the diamond tool 26 in the direction of removal from the mounting hole 33. Therefore,
When the diamond tool 26 is to be replaced or the like, it can be easily removed from the mounting hole 33.

Effects of the invention In this invention, by installing a spring at the bottom of the mounting hole as described above, the diamond tool can be easily removed from the mounting hole by the biasing force of the spring, and the diamond tool can be replaced. In addition, by providing a fixing means to fix the diamond tool in the mounting hole, the spring does not affect the machining operation of the grindstone. Therefore, there is no need for subtlety in setting the strength of the spring, and the design can be simplified.

[Brief explanation of the drawing]

Figures 1 to 4 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 a front view showing the second embodiment. 5, 6...Movable block (support block), 1
9... Rotating body (support body), 25... Inclined hole (attachment hole), 26... Diamond tool, 28... Spring, 31... Support block, 32... Support body, 33... Attachment hole.

Claims (1)

[Scope of utility model registration request] A support is movably attached to the support block, a mounting hole is formed in the support for inserting and mounting a diamond tool, and a fixing means is provided for fixing the diamond block attached to the mounting hole in the mounting hole. A diamond tool mounting structure for a grindstone dresser, characterized in that a spring is attached to the bottom of the mounting hole to bias the diamond tool with a certain strength or more in the direction of removal from the mounting hole.