JPH02124268A - Dresser for plane grinder - Google Patents

Abstract

PURPOSE:To dress the grinding face of a rotary grindstone in optional shape by providing a profile mechanism moving a dressing tool in the axial direction. CONSTITUTION:When a dressing arm 13 is turned around a dressing shaft 12 with driving a rotary grindstone 10 by its rotation, the probe 26 of a stylus 21 is slided by being guided by a face 25 because of its being fixed. The sliding of this stylus 21 is transmitted to a tool shaft 22 by a link 23, a dressing tool 16 is moved in the axial direction and the grinding face 18 of the rotary grindstone 10 is subjected to dressing in the desired shape.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a dresser for a surface grinder that dresses the grinding surface of a rotary grindstone of the surface grinder.

(Prior Art and its Problems) For example, in a dresser for a two-axis opposed double-headed surface grinder with opposing rotating grindstones, the dressing tool 100 has conventionally been orthogonal to the grindstone shaft 101 at the dressing arm 102, as shown in FIG. Since the grinding wheel 104 is movable only within the surface 103, it is easy to grind the grinding surface 105 of the grindstone 104 into a flat surface, but it is not possible to dress the grinding surface 105 into a shape that allows ideal grinding. .

Furthermore, a mechanism for tilting a grindstone rotating shaft, called a tilting mechanism, has been known. When dressing the grinding surface of the grinding wheel into a shape other than a flat surface, use this tilting mechanism to adjust the grinding wheel shaft lo of the double-headed grinder as shown in Fig. 9.
t is tilted so that the grinding surface opens forward with respect to the workpiece feeding direction shown by arrow A, and the grinding surface is dressed in a conical shape with an inclined deaf. After dressing, the front half 10B of the grinding surface opens forward, and the rear half becomes a parallel plane 10B.
7, and if grinding is performed in this state, grinding suitable for cases where the grinding allowance is large is possible. However, when the workpiece leaves the grindstone, the grindstone 1 forms a parallel plane 107.
There is a problem that in the latter half of 04, the workpiece is kicked by one of the grinding surfaces and the finish of the workpiece is damaged.

To solve this problem, it is desirable to form the part where the workpiece leaves the grinding wheel in a tapered shape that opens backwards, as shown in the grinding surface 110 in Figure 8.However, with the current dresser, the grinding wheel is shaped into an ideal shape. I can't do anything.

Furthermore, since the cutting speed of the grinding surface near the grindstone axis becomes extremely slow, it is actually preferable not to perform polishing work near the grindstone axis. Therefore, it would be ideal if the area near the grinding wheel axis of the grinding surface could be dressed into a concave surface 112 so as not to polish the workpiece, but similarly, with conventional dressers, it is not possible to make only the area near the grinding wheel axis concave.

(Object of the Invention) An object of the present invention is to provide a dresser for a back surface grinder that can shape the grinding surface of a rotary grindstone into an arbitrary shape.

(Structure of the Invention) (1) Technical Means The present invention provides a surface grinding machine in which a dressing arm is provided that is movable along the axial end face of a rotating grindstone, and a dressing tool is provided on the dressing arm to dress the grinding surface of the rotating grindstone. This dresser for a surface grinding machine is characterized in that the dressing tool is provided with a copying mechanism that moves the dressing tool in the direction of the rotating grindstone axis, and the grinding surface of the rotating grindstone is dressed in an arbitrary cross-sectional shape.

(2) The dressing tool is moved in the axial direction by the action copying mechanism, and the grinding surface is shaped into an arbitrary shape.

(Embodiments) (1) First Embodiment FIG. 1, which shows the main parts of a double-head surface grinder employing the present invention, is a side view of a right-hand rotary grindstone 10 viewed from the direction of the grindstone shaft 11. As shown in FIG. In FIG. 1, a dressing shaft 12 is provided near the rotating grindstone 10 and extends parallel to the grindstone shaft 11. As shown in FIG. A boss portion 14 of a dressing arm 13 is rotatably fitted onto the dressing shaft 12, and a dressing tool 16 made of, for example, diamond is provided at the tip of the dressing arm 13. The dressing tool 16 moves in an arc on a track 17 with the dressing shaft 12 as the center, and is movable in the axial direction, that is, in the direction perpendicular to the plane of the paper, as will be described in detail later, to form the grinding surface 18 of the rotary grindstone 10 into an arbitrary shape. It comes with dressing.

The dressing arm 13 is provided with a copying mechanism 20 for moving the dressing tool 16 in the axial direction. As shown in FIG. 2, which is a view in the direction of the ■ arrow in FIG. A tool shaft 22 that holds the tool so as to be movable in the axial direction relative to the dressing arm 13.
, a link 23 connecting the stylus 21 and the tool shaft 22
, and is formed from a template 24, etc., which is traced by the stylus 21.

The right end of the stylus 21 is slidably fitted into the dressing arm 13 parallel to the dressing shaft 12 (only the center is shown), and the left end of the stylus 21 is fitted with a template 24 in the shape of an arcuate plate (see FIG. 3). ) is provided with a probe 26 that comes into pressure contact with the cam surface 25 of the probe.

As shown in FIG. 4, the cross-sectional shape of the cam surface 25 is such that when the grinding surface 18 is dressed along the arcuate trajectory 17 (FIG. 1), the grinding surface 18 can be ground into a predetermined shape. It is set. The template 24 is supported by a boss portion 30 that fits on the dressing shaft 12, and the boss portion 30 is fixed to a fixing member 36 of the grinding machine body (not shown) with a bracket 31.

Therefore, even if the dressing arm 13 rotates around the dressing shaft 12, the template 24 does not rotate and is always fixed at a constant phase position.

The tool shaft 22 is slidably fitted to the tip of the dressing arm 13 in the same manner as the stylus 21. Tool axis 2
The left end of 2 protrudes from the trace arm 13 and connects to the link 23.
The tips of the two are rotatably connected by a pin 32. Link 2
The base end of the link 3 is rotatably connected to the stylus 21 with a pin 33, and the intermediate part of the link 23 is connected with a bracket 35 with a pin 34.
It is supported by a shaft. The bracket 35 is fixed to the dress arm 13.

In FIG. 2, the copying mechanism 20 is shown to be provided only on the right-hand grindstone 10, but by similarly providing the copying mechanism 20 on the left-hand grindstone 10, both grindstones 10 can be dressed. It is possible. In addition, copying mechanism 2
If two sets of copying mechanisms 20 are provided, but if the copying mechanisms 20 can be mounted in the left and right directions with respect to the dressing shaft 12, one set of copying mechanisms 20 can dress the rotary grindstones 10 on both sides.

Next, the effect will be explained. In the first embodiment described above, when the dressing arm 13 is rotated around the dressing shaft 12 while rotating the rotary grindstone 0, the probe 2 of the stylus 21 is rotated.
The stylus 6 slides while being guided by a fixed cam surface 25 (Fig. 4), and the sliding movement of the stylus 21 is transmitted to the tool shaft 22 through the link 23, and the dressing tool 16 moves in the axial direction to rotate the rotating grindstone. For example, the grinding surface 18 of No. 10 is the grinding surface of FIG.
Dress like 0.

(2) Second Embodiment In FIG. 5 showing a second embodiment of the present invention, parts indicated by the same symbols as in FIG. 1 indicate the same or equivalent parts.

In Fig. 5, the left side rotary grindstone 1o of the double-headed grinding machine is viewed from the direction of the grindstone shaft 11, and there is a dressing shaft 1 near the rotary grindstone 1o.
2, and a boss portion 14 of a dressing arm 13 is rotatably fitted to the dressing shaft 12. dress arm 1
Dress tool 1 is on the top surface of 3, as will be described in detail later.
6 along a linear track 40 is provided, and the slider 41 is slidable by a hydraulic cylinder 42.

The dressing arm 13 is provided with a copying mechanism 44 that drives a tool shaft 43 holding the dressing tool 16 in the axial direction (perpendicular direction as shown in FIG. 5).

As shown in FIG. 6, the copying mechanism 44 includes a template 45 arranged substantially parallel to the dressing arm 13, a probe 46 connected to the right end of the tool shaft 43, and the like. The tool shaft 43 is fitted into the boss portion 50 of the slider 41 so as to be slidable in the axial direction (left-right direction in FIG. 5) parallel to the dressing shaft 12.

A flange portion 51 is formed at the right end of the tool shaft 43, and a coil spring 52 is compressed between the flange portion 51 and the boss portion 50 to urge the tool shaft 43 to the right in the figure. ing.

The slider 41 is provided on the dress arm 13.
The trace arm 1 is guided by the book rail 53 (Fig. 7).
It is slidable in the longitudinal direction of 3.

The left end of the slider 41 in FIG. 7 is rotatably connected to a rod 54 of a hydraulic cylinder 42 or a pin 55.

In FIG. 6, the template 45 is arranged substantially parallel to the dressing arm 13, and the template 45 is rotatably fitted to the dressing shaft 12 at a boss portion 56. Furthermore, the boss portion 56
is connected to the boss portion 14 by a connecting vibrator 57, and the dress arm 13 and template 45 are integrally connected.

In FIG. 6, the copying mechanism 44 is shown to be provided only on the left-hand grindstone 10, but by similarly providing the copying mechanism 44 on the right-hand grindstone 10, both grindstones 10 can be dressed. It is possible. In addition, copying mechanism 4
4, but if the copying mechanism 44 can be installed in the left and right directions with respect to the dressing shaft 12, one set of the copying mechanism 44 can dress the rotary grindstones 10 on both sides.

Next, the effect will be explained. In the second embodiment described above, when the hydraulic cylinder 42 slides the slider 41 on the rail 53 while rotating the rotary grindstone 10, the probe 46 of the tool shaft 43 moves in the axial direction along the cam surface 58 of the template 45. The dressing tool 16 dresses the grinding surface 18 of the rotary grindstone 10 by following the cam surface 58.

(Another embodiment) (1) The copying mechanism of the present invention is not limited to the above two embodiments,
Other structures may be used as long as the dressing tool 16 can be moved in the axial direction.

(2) Furthermore, a dress tool is linked to the template]
In addition to the copying mechanism that moves the dressing tool 16, it is also possible to electronically control a hydraulic mechanism, an electric motor, or the like to directly drive the dressing tool 16 in the axial direction.

(Effects of the Invention) As explained above, in the dresser of the surface grinding machine according to the present invention, since the copying mechanism 20 and the copying mechanism 44 for moving the dressing tool 16 in the axial direction are provided, the grinding surface 18 of the rotary grindstone 10 can be freely adjusted. An ideal rotary grindstone 1, such as the grinding surface 110, 112 in Fig. 8, can be dressed in the shape of
0 shape.

By using the dresser of the present invention as shown in FIG. 9, there is no need to tilt the grinding wheel shaft 101.
Since there is no need to provide a tilting mechanism on the grinding wheel 1, the structure of the grinding machine is simplified, the rigidity is increased, and the
1 improves the accuracy of the axis center.

[Brief explanation of the drawing]

1 is a schematic side view showing the first embodiment of the present invention, FIG. 2 is a view in the direction of the ■ arrow in FIG. 2, FIG. 3 is a view in the direction of the ■ arrow in FIG. 2, and FIG. 4 is a view in the direction of the ■ arrow in FIG. IV-rV sectional view, FIG. 5 is a schematic side view of the second embodiment, FIG. 6 is a view in the direction of the ■ arrow in FIG. 5, FIG. 7 is a view in the direction of the ■ arrow in FIG. 6, FIGS. 8 and 9 Each figure is a structural diagram showing a conventional example. 10... Rotating grindstone, 12... Dressing axis, 13... Dressing arm, 16... Dressing arm,
20.44... Copying mechanism,... Stylus, 2... Tool axis, 3... Link, 24,... Template

Claims (1)

[Claims] In a dresser for a surface grinding machine, a dresser for a surface grinding machine is provided with a dressing arm that is movable along an axial end surface of a rotating grindstone, and a dressing tool for dressing the grinding surface of the rotating grindstone is provided on the dressing arm, and a copying mechanism is provided for moving the dressing tool. , a dresser for a surface grinding machine, characterized in that the grinding surface of a rotary whetstone can be dressed into an arbitrary cross-sectional shape.