JPH0719705Y2 - Tool polishing jig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a tool polishing jig provided in a tool polishing machine for polishing a spiral blade such as an end mill.

(Prior art) In end mills, etc., the spiral angle of the spiral blade is set variously according to the purpose of use, etc. Therefore, when polishing the spiral blade, the feed motion of the tool is quickly changed to a spiral motion that matches the spiral angle. Required to set.

Conventionally, a spindle with a tool attached is supported by the jig body so that it cannot rotate in the axial direction, although it is rotatable with respect to the jig body, the jig body is fixed to the polishing machine table, and the spiral groove of the tool is used. The tool is moved in the main axis direction by moving the entire polishing machine table in the length direction of the main axis, and the guide bar imparts a rotational movement to the tool so that the tool makes a spiral movement.

However, in a structure in which the entire polishing machine table is moved, the moving mass and the stopping motion during the spiral movement are not smoothly performed due to the large moving mass, and skill is required for the feeding work and the like. Further, it takes time and effort to guide each tool with a guide bar according to the twist angle.

As another conventional technique, there is JP-A-63-62632. In this conventional technique, the main shaft is supported rotatably and axially movable with respect to the jig body, but as a spiral feed mechanism, a coil spring set arranged along the outer periphery of the main shaft and closely contacting each other is provided. Two pairs of engaging projections, which are provided on the main shaft so as to project in the radial direction, are engaged with the grooves between the coil springs in close contact with each other, and the coil spring is provided with a twist angle imparting mechanism.
The engaging protrusion is guided by a coil spring that is spirally twisted to a predetermined lead angle and is helically twisted.

However, in the above coil spring type spiral feed mechanism, not only four long coil springs for guides have to be arranged on the outer peripheral surface of the main shaft, but also a large number of pushes are required to maintain the coil spring circumferential distance. Requires a spring and a presser ball,
Further, a twist angle imparting mechanism must be arranged at the front and rear ends of the main shaft. Therefore, the structure is complicated, the assemblability is low, and the assembling cost is high. In addition, the spindle itself needs to be machined.

Furthermore, since a long coil spring is twisted to form a spiral guide, it is difficult to secure a uniform twist angle over the entire length of the spring.

(Object of the Invention) The object of the invention described in claims 1 to 7 of the present application is to enable various simple and accurate spiral lead of the main shaft by means of a cylindrical lead roller which is in pressure contact with the main shaft and has a variable lead angle. (EN) A spiral feed mechanism capable of accurately and easily polishing a spiral blade having a helix angle, and easy to assemble, having a small number of parts, and having a simple structure.

The inventions set forth in claims 2, 3, 4 and 5 also aim to make it possible to grind easily and accurately even with a tool having a tapered spiral blade by adding a copying device.

In the inventions of claims 6 and 7, it is also an object to further improve the guide performance of the lead roller by making it possible to prevent oil or the like from adhering to the pressure contact portion between the lead roller and the main shaft.

(Technical Means and Actions for Achieving the Purpose) In the invention according to claim 1, the main shaft is movably and rotatably supported by the polishing jig main body through the bearing, and the tool is coaxially mounted on the main shaft. A tool holder to hold is made detachable at the spindle end, and a roller holder having an axis perpendicular to the axis of the spindle can be moved in the axis direction of the roller holder and can be fixed by rotation around the axis of the roller holder. Freely supported by the jig body, and the roller holder rotatably supports a cylindrical lead roller for spiral guidance having a rotation axis perpendicular to the roller holder axis, and the roller holder is held by the holder axis. By adjusting the rotational position around the main shaft, the lead angle formed by the roller rotating surface perpendicular to the rotary shaft can be adjusted to a predetermined angle, and the roller holder is biased toward the main shaft by a spring member. Lead by The roller is pressed against the surface of the spindle with the above-mentioned lead angle to spirally guide the spindle.

If the angle of the rotating surface of the lead roller with respect to the axis of the spindle (lead angle) is adjusted to the helix angle of the spiral blade of the tool, the spindle will be spirally guided by the lead roller only by rotating the spindle. The spiral blade is precisely ground with a grindstone.

The invention according to claim 2, 3, 4 or 5 is the device according to claim 1, further comprising: a copying cam configured to move in the axial direction together with the main shaft, and a copying device including a contactor contacting the copying cam. The main shaft and the jig body are moved in the direction perpendicular to the main shaft with respect to the contact of the copying apparatus. Therefore, the polishing work of the tapered spiral blade can be easily performed.

In the inventions according to claims 6 and 7, in the inventions according to claims 1 to 5, the outer peripheral surface of the main shaft and the surface of the lead roller are in contact with the wiper.

This prevents oil components and the like from adhering to the pressure contact portion between the lead roller and the surface of the spindle. Therefore, the frictional force between the lead roller and the main shaft is sufficiently maintained, and the lead roller can perform good spiral guidance.

(Example) FIG. 2 is a vertical side view of a tool polishing jig to which claims 1, 6, and 7 of the present application are applied, and assuming that the tool mounting side is the front,
The polishing jig main body 2 is mounted on a pedestal 1 via a guide rail 3 so as to be movable and fixed in a guide rail length direction, and the pedestal 1 is fixed on a polishing machine table 50. A cylindrical bearing case 5 extending in the front-rear direction (direction orthogonal to the guide rail 3) is fixed to the jig body 2, and the bearing case 5 is fixed.
Ball bearings 6 are provided on the inner peripheral surface of the bearing at a distance in the front-rear direction. Inside the ball bearing 6, a cylindrical main shaft 8 extending in the front-rear direction is supported so as to be rotatable and movable in the front-rear direction. A holder mounting shaft 11 is inserted into the main shaft 8 from the rear, and a taper hole for mounting the holder is provided at the front end.
10 is formed, and the tool holder 9 is provided in the tapered hole 10.
Are fitted and fixed by the tip bolt 12 of the mounting shaft 11.

A holder support hole 21 is formed in the upper part of the jig body 2 at a center line O2 that is perpendicular to the spindle axis O1 and extends vertically. The holder hole 21 is coaxial with the support hole 21 in the vertical direction. A roller holder 14 is movably arranged. The roller holder 14
A needle bearing 20 is fixed to the outer peripheral surface of the needle bearing 20, and the outer peripheral surface of the needle bearing 20 is fitted in the support hole 21 so as to be vertically movable. A lead roller 17 is rotatably supported on the lower half of the holder 14 via a horizontal roller shaft 18,
On the other hand, a disc spring 24 having a strong spring force is contracted between the holding body 14 and the upper bearing 19, and the elastic force of the disc spring 24 causes the lower end portion of the lead roller 17 to exert a strong force on the surface of the main shaft 8. Pressed. The lead roller 17 is a simple cylindrical roller, and has a narrow roller width like the shape shown in the plan view of the second embodiment of FIG. The surface of the lead roller 17 is coated with a member that repels oil components, for example. The upper rod 15 of the holding body 14 extends upward and is provided with the operating disc 22 shown in FIG. That is, when the disk 22 is rotated, the spindle axis O1
The angle (lead angle) of the rotating surface (the surface perpendicular to the roller shaft 18) of the lead roller 17 with respect to the can be matched with the twist angle of the tool.

A first wiper 26 for removing oil and dust is in contact with the upper end portion of the lead roller 17, and a second wiper 28 which is in contact with the outer peripheral surface of the main shaft 8 is arranged in both the front-rear direction of the lead roller 17. There is. The second wiper 28 is replaceably fitted in the inner peripheral annular groove of the bearing case 5. Also the first wiper
Numeral 26 is replaceably attached to the holding body 14 by an appropriate concave and convex engaging means.

FIG. 1 is a side view. A clamp lever 30 is provided on the upper portion of the jig body 2, and the holding body 14 is tightened by operating the clamp lever 30 to set the lead angle of the rotating surface of the lead roller 17 to a desired value. It can be fixed at an angle.

(Operation) By mounting the tool T such as an end mill on the tool holder 9 and adjusting the rotation of the holding body 14 about the axis O2, for example, like a steering apparatus of an automobile, the spindle axis is viewed from above.
The lead angle (corresponding to the steering angle) of the rotating surface of the lead roller 17 with respect to O1 is adjusted to the helix angle of the spiral blade of the tool, and fixed by the clamp lever 30.

Then, when the main shaft 8 is manually rotated, for example, in the A1 direction in FIG. 1, the main shaft 8 is spirally guided along the spiral blade of the tool by the lead roller 17 which is in pressure contact with the main shaft surface.
In other words, it progresses in the direction of A1 while turning around. Therefore, the tool T spirally moves along the spiral blade with respect to the grindstone P and is polished.

(Embodiment of the invention as claimed in claims 2 and 3) FIGS. 3 and 4 show a tool polishing jig which is basically the same as in FIGS. 1 and 2, and a copying apparatus 40 is additionally provided. ing. That is, as shown in FIG. 4, a holder 14 is attached to a main shaft 8 supported by a jig main body 2 so as to be movable in the front-rear direction and rotatable, and rotatable about an axis O2 orthogonal to the main axis O1 and vertically movable. And the disc spring 24 is rotatably supported by the holder 14.
Lead roller 17 pressed against the surface of the spindle by the elastic force of
Is equipped with.

The jig body 2 is fixed on the upper surface of the roller slide base 41,
The roller slide base 41 is the lower roller base fixed side 41a.
Is movably mounted at a right angle to the main shaft 8 via the guide rail 49, and the roller base fixed side portion 41a is mounted on the polishing machine table 50.
It is fixed on the upper surface of.

The copying apparatus 40 shown in FIG. 3 includes a taper copying cam 43 that is replaceably fitted in the rear portion of the main shaft 8 and a roller support leg 45.
Copy roller rotatably supported via an axis perpendicular to the
It is composed of 42 mag.

The roller support leg 45 is fixed to the upper surface of the polishing machine table 50 (or the roller slide base fixing side portion 41a),
The copying cam 43 is fixed to the main shaft 8 by a fixing ring 31. Further, the jig body 2 is moved along with the roller slide base 41 in the direction perpendicular to the main shaft axis by an appropriate biasing means.
It is biased to the side and locked in the position shown in FIG.

Reference numeral 46 denotes a guide blade arranged in front of the tool, which engages with the spiral groove of the tool T. Reference numeral 47 is a handle for moving the lead roller up and down, which is engaged with the roller holder 14 via a cam ball (not shown) for raising and lowering, and when the handle 47 is rotated, the lead roller 17 is raised together with the holder 14 by a cam action. be able to. Reference numeral 48 in FIG. 4 is a lead angle scale.

The spiral induction of the main shaft 8 by the lead roller 17 at the time of polishing is the same as that in the case of FIG. 1 described above, but when the spiral blade of the tool T is formed in a tapered shape, it is adjusted to the taper of the spiral blade. A copying cam 43 having a taper angle is attached and polishing is performed. That is, in the process of the spindle 8 moving forward while spiraling, the copying cam 43 comes into contact with the copying roller 42 so that the spindle 8 moves in the direction of arrow C1 in FIG. 3 together with the jig body 2 and the roller slide base 41 (fine movement). ) Do. Thereby, the tapered spiral blade is precisely ground.

It is also possible to separate the lead roller 17 from the surface of the spindle by the handle 47 for moving the lead roller up and down and to guide the spindle to the copying roller 42 in a rotatable state.

(Embodiment of the Invention According to Claim 4) In FIGS. 5 to 7, a pivot shaft type copying apparatus 59 is added to the tool polishing jig which is basically the same as in FIGS.
That is, in FIG. 6, a main shaft 8 rotatably and rotatably supported by a jig main body 2 and a holder which is rotatable about an axis O2 perpendicular to the main axis O1 and is vertically movable.
14 and a lead roller 17 rotatably supported by the holder 14 and pressed against the surface of the main shaft by the elastic force of the disc spring 24.

As shown in FIG. 7, the jig main body 2 is rotatably supported by an L-shaped jig base 51, which is separate from the jig main body 2, via a pivot shaft 52 parallel to the main shaft 8 and is also supported by a coil spring 53. It is biased in the direction of the arrow D2 in FIG. 7, whereby the copying cam 43 is pressed against the copying roller 42 described below, and the state of FIG. 7 is maintained.

The copying roller 42 is rotatably supported by a roller supporting leg 45 via a vertical axis, and the supporting leg 45 is fixed to a base 51.

According to this structure, the spiral movement of the main shaft 8 by the lead roller 17 at the time of polishing is the same as the operation shown in FIG. 1 described above, but when the spiral blade of the tool T is formed in a tapered shape, The combined copying cam 43 is attached and polished. That is, in the forward stroke while the main shaft 8 spirals, the copying cam 43 comes into contact with the copying roller 42, so that the main shaft 8 moves together with the jig main body 1 around the pivot shaft 52 in the D1 direction in an arc (fine movement). As a result, a grinding stone is used to accurately grind the tapered spiral blade.

(Embodiment of the invention according to claim 5) FIGS. 8 to 10 show a so-called sine bar type copying apparatus in which an inclination angle can be adjusted to a tool polishing jig which is basically the same as in FIGS. 60 is added. That is, in FIG. 8, a main shaft 8 rotatably and rotatably supported by a jig main body, and a holder 14 which is rotatable about an axis O2 perpendicular to the main axis O1 and vertically movable. A lead roller 17 is rotatably supported by the holder 14 and pressed against the surface of the main shaft by the elastic force of the disc spring 24.

The jig body 2 is fixed on the upper surface of the roller slide base 41,
The roller slide base 41 is mounted on the roller base fixed side portion 41a via the guide rail 49 so as to be movable in the direction perpendicular to the main shaft 8, and the roller base fixed side portion 41a is fixed to the upper surface of the polishing machine table 50.

The copying apparatus 60 comprises a stylus 62 and a sine bar type copying cam 63 shown in FIG. As shown in FIG. 9, the stylus 62 is supported by a support base 65 so as to be adjustable in a direction perpendicular to the main shaft axis and is locked by a locking bolt 75. The support base 65 is attached to the polishing machine table 50 (or the roller slide base fixed side). Part 41
It is fixed to a).

As shown in FIG. 10, the sine bar-type copying cam 63 is rotatably supported by a cam base 67 via a support shaft 66 at the front end, whereby the inclination angle (taper angle) θ with respect to the spindle axis can be arbitrarily set. It can be adjusted. A lock bolt 69 is screwed to the rear end portion of the copying cam 63, and the lock bolt 69 is movably inserted into an arc-shaped long hole of the cam base 67, though not shown.
By tightening the lock bolt 69, the sine bar type copying cam 63 can be fixed at an arbitrary inclined position.

Further, as shown in FIG. 9, the cam base 67 is supported by a guide plate 78 fixed to the roller slide base 41 so as to be movable in the main shaft length direction, and a bearing case 73 is integrally formed on the upper end of the cam base 67. It is provided in.

As shown in FIG. 8, the bearing case 73 rotatably supports the rear end of the main shaft 8 via a bearing 74, and the bearing case 73 is fixed to the main ring 8 so as to move in the front-rear direction. It is locked by 80. That is, the cam table 67 and the copying cam 63 shown in FIG. 9 can move axially together with the spindle 8, and the jig body 2, the spindle 8, the cam table 67, and the copying cam 63 together with the roller slide table 41 serve as the spindle. It can be moved in the direction perpendicular to. Further, together with the roller slide base 41 of the jig body 2, it is biased toward the stylus 62 side by an appropriate biasing means.

When polishing a tool such as an end mill having a tapered spiral blade, adjust the inclination angle (taper angle θ) of the sine bar type copying cam 63 to the taper of the tool, and use the bolt 69
Fix with.

The spiral induction of the main shaft 8 by the lead roller 17 at the time of polishing is the same as the operation of FIG. 1 described above, but in the process of the main shaft 8 moving forward while spiraling, the sine bar type copying cam 63 is attached to the tip of the stylus 62. Abutting,
The main shaft 8 moves (finely moves) in the direction of arrow C1 in FIG. 9 together with the cam table 67, the bearing case 73, the jig body 1 and the roller slide table 41. Thereby, the tapered spiral blade is precisely ground.

(Other Embodiments) (1) In the structure shown in FIG. 2, the roller holder 14 is instructed to be rotatable and movable in the vertical direction via the needle bearing 20. The bearing used can also be used as a roller holder bearing.

(2) Install the roller lifting handle 47 shown in FIG.
It is of course possible to provide the jig shown in FIG.

(Effects of the Invention) As described above, according to the inventions according to claims 1 to 7 of the present application: (1) A spindle 8 for mounting a tool is rotatably and axially movably supported with respect to the jig body 2; Since the main shaft 8 is spirally guided by the lead roller 17 that is pressed against the surface of the main shaft 8 to polish the spiral blade of the tool,
The moving mass is significantly smaller than the conventional structure in which the entire polishing machine table is moved in the axial direction. Therefore, the movement and stop operation during the polishing work can be accurately and smoothly performed, and the work can be facilitated and the polishing accuracy can be improved.

(2) The angle (lead angle) of the rotating surface of the lead roller 17 with respect to the axis of the main shaft 8 is adjustable, and the lead roller 17
Since the spiral force is guided by the frictional force between the main shaft surface and the surface of the spindle, it is easy to set the lead angle so that any spiral blade with any helix angle can be easily guided according to the helix angle. Will be easier.

(3) Cylindrical lead roller 17 pressed against the outer peripheral surface of the spindle
By changing (that is, steering) the direction of the rotation surface of the lead roller 17, the lead angle is arbitrarily adjusted, and the frictional force between the lead roller 17 and the outer peripheral surface of the spindle that are steered in a predetermined direction. Since the spiral is guided by the main shaft 8, the main shaft itself does not need to be specially processed for spiral movement or provided with parts, and the main shaft 8
Since it is only necessary to provide the lead roller 17 at one place,
The manufacturing process is facilitated, the assemblability is improved, and the assembling cost can be saved.

(4) In the inventions according to claims 2, 3, 4, and 5, the copying cams 43 and 63 that move in the axial direction together with the main shaft 8 and the copying cam 4 are provided.
A contactor abutting against 3, 63, that is, the copying apparatus 40, 59, 60 including the copying roller 42 or the stylus 62 is arranged,
Since the spindle 8 and the jig body 2 are moved (finely moved) in the direction perpendicular to the spindle axis center with respect to the contacts of the copying devices 40, 59, 60, polishing work of the tapered spiral blade can be easily performed. .

In particular, according to the invention as claimed in claim 5, since the copying cam is of a sine bar type in which the angle can be freely adjusted, it is possible to quickly cope with spiral blades having various taper angles.

Further, according to the inventions of claims 6 and 7, when the wiper 26, 28 is brought into contact with the outer peripheral surface of the main spindle or the surface of the lead roller 17, oil components or dust is attached to the pressure contact portion between the lead roller 17 and the main spindle surface. Since it is prevented, the frictional force between the lead roller 17 and the main shaft 8 is sufficiently maintained, and the lead roller 17 can reliably guide the spiral.

[Brief description of drawings]

1 is a side view of a tool polishing jig to which claims 1, 6, and 7 of the present application are applied, FIG. 2 is a vertical sectional side view of the polishing jig of FIG. 1, and FIG. FIG. 4 is a plan view of a tool polishing jig to which the present invention is applied, FIG. 4 is a view taken along arrow IV of FIG. 3, FIG. 5 is a plan view of a tool polishing jig to which the present invention is applied, and FIG. FIG. 5 is a view on arrow VI, FIG. 7 is a view on arrow VII in FIG. 5, FIG. 8 is a side view of a tool polishing jig to which the invention according to claim 5 is applied, and FIG. 9 is FIG. IX arrow view, Figure 10 is X in Figure 8
It is a -X sectional view. 2 ... Jig body, 6 ... Bearing, 8 ...
… Spindle, 9 …… Tool holder, 14 …… Roller holder,
17: Lead roller, 24: Disc spring (spring member), 2
6, 27 ...... First and second wipers, 40, 59, 60 ... Copying device, 41 ... Roller slide base, 42 ... Copying roller (one example of contactor), 43 ... Copying cam, 51 ... … Jig base, 52 …… Pivot shaft, 53 …… Coil spring, 62 …… Stylus (another example of contactor), 62 …… Sine bar copying cam, 67 …… Cam stand

Claims (7)

[Scope of utility model registration request] 1. A tool holder for supporting a spindle (8) on a polishing jig body (2) via a bearing (6) so that the spindle (8) can move axially and rotatably, and holds the tool coaxially with the spindle (8). (9)
The roller holder (14), which has a shaft center (O1) and is perpendicular to the shaft axis (O1), can be moved in the roller holder shaft center (O2) direction and can be held by the roller. It is supported by the jig body (2) so that it can be rotated and fixed around the body axis,
The roller holder (14) rotatably supports a cylindrical lead roller (17) for spiral guidance having a rotation axis (18) perpendicular to the roller holder axis (02), and the roller holder (14) ) Is rotated about the holder axis (O2) to adjust the lead angle of the roller rotation surface perpendicular to the rotation axis (18) to a specified angle with respect to the main axis (O1). Tool polishing in which the lead roller (17) is pressed against the surface of the spindle with the above lead angle by urging the roller holder (14) toward the spindle with a spring member to spirally guide the spindle (8). jig. 2. A jig main body (2) comprising a copying cam (43) mounted on an outer peripheral surface of a main shaft (8), and a copying device (40) including a contactor contacting the copying cam (43). 3. The tool polishing jig according to claim 1, wherein the tool is movable in a direction perpendicular to the main shaft with respect to the contact. 3. The tool polishing jig according to claim 2, wherein the jig main body (2) is supported on a roller slide base (41) which is movable in the same movement direction as the copying movement direction. 4. A jig main body (2) comprising a copying cam (43) mounted on an outer peripheral surface of a main shaft (8) and a copying device (40) including a contactor contacting the copying cam (43). ) Is the main axis (8)
It is rotatably supported by a jig base (51) via a pivot shaft (52) parallel to the shaft, and the jig body (2) is biased by a spring member in a direction in which the copying cam (43) is pressed against the contact. Then
The tool polishing jig according to claim 1, wherein the copying operation of the lead roller (17) is an arc motion centered on the pivot shaft (52). 5. A cam base (67) having a copying cam (43),
A copying device (60) including a contactor that comes into contact with the copying cam (43) is arranged, and the cam base (67) is connected to the main shaft (8) via a bearing so as to be axially movable together with the main shaft (8). The tool polishing jig according to claim 1, wherein the copying cam (43) is swingably fixed to a cam base (67) so that the inclination of the copying cam (43) with respect to the spindle axis (01) can be adjusted. . 6. The tool polishing jig according to claim 1, wherein a wiper member is brought into contact with the outer peripheral surface of the spindle. 7. The tool polishing jig according to claim 1, wherein a wiper is brought into contact with the surface of the lead roller.