JPH0544453U - Surface grinding machine sharpening device - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to improve the dressing accuracy of a dressing device for a surface grinder. [Structure] Dressing arm for dressing that can swing freely on the side of the rotating grindstone (1) with an arm axis parallel to the axis of rotation as a fulcrum.
(12) is provided, and the dressing arm (12) has a grinding surface of the grindstone (1).
A pressing pressure applying mechanism (24) that supports the dressing tool (20) movably in a substantially vertical direction with respect to (1a) and presses the dressing tool (20) against the grinding surface with a constant pressing pressure.
Is a sharpening device for a surface grinding machine.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a dressing device for a surface grinding machine, which mainly performs dressing and truing correction of a rotating grindstone that uses super abrasive grains such as CBN or DIA grindstone.

[0002]

[Prior Art]

 Generally, dressing tools are fixed on a surface grinder by setting the dressing tool to a specified depth and moving the grindstone in a direction perpendicular to the axis of rotation, or dressing tools. There is a method in which a person holds it directly with his / her hand and presses it against the grinding stone correction surface.

[0003]

[Problems to be solved by the device]

 In the former case, even if the dressing tool position (cutting depth) is set first, when the dressing tool hits the rotary grindstone, the dressing tool will be consumed, so dress the area to be corrected accurately on the same plane. Is difficult. Further, the latter method has a problem in safety.

[0004]

[Means for Solving the Problems]

 According to the present invention, a dressing arm for dressing is provided on the side of a rotating grindstone, the dressing arm being capable of swinging about an arm axis parallel to the axis of rotation as a fulcrum. The dressing device for a surface grinding machine is characterized in that the dressing tool is movably supported on the grinding machine and a pressing pressure applying mechanism for pressing the dressing tool against the grinding surface with a constant pressing pressure is provided.

[0005]

[Action]

 With the pressing pressure application mechanism, the dressing tool is pressed against the grinding surface of the grindstone with a pressing force in the vertical direction, and the dressing arm is swung while maintaining the pressed state, so that the grinding surface of the rotating grindstone is dressed. Alternatively, corrective work such as truing is performed.

[0006]

【Example】

 1 to 3 are examples applied to a vertical type double-sided surface grinder. In FIG. 3, a pair of upper and lower rotary grindstones 1 are arranged on the same axis and face each other with a grinding gap in the axis direction. However, each is fixed to the vertical rotating main shaft 3. As shown in FIG. 1, a rotatable carrier disk 7 projects between the grindstones 1. The carrier disk 7 holds a work in a pocket 8 and passes between the grindstones, while the two surfaces of the work are parallel to each other. It is designed to be ground.

The dressing arm 12 of the dressing device 10 is arranged on the side opposite to the carrier disk 7, and the base end of the dressing arm 12 is fixed to an arm shaft 11 parallel to the rotary main shaft 3, and the arm shaft 11 is It is rotatably supported by the bearing portion 13 of the main body of the grinder.

In FIG. 3, a pin shaft 15 perpendicular to the arm shaft 11 is fixed to the tip of the dress arm 12, and an intermediate part of a tool holder 17 is rotatably supported on the pin shaft 15. .. The tip of the tool holder 17 is formed in a bifurcated upper and lower shape and has a pair of upper and lower tool mounting portions 17a, and a disc-shaped dressing tool 20 is fixed to each mounting portion 17a. Each dressing tool 20 is inclined so as to be closer to the center line of the holder as it goes to the tip side, and when the tool holder 17 is rotated around the pin shaft 15, the dressing surface 20a of the dressing tool 20 is rotated by a rotary grindstone. It is attached to the grinding wheel surface 1a of No. 1 at an angle such that the grinding wheel surface 1a can come into contact with the grinding wheel surface 1a.

At the portion of the dress arm 12 corresponding to the base end of the tool holder 17, a pressing cylinder 24 is provided on one side (upper side) of the swinging direction of the tool holder 17, and a neutral cylinder 25 is provided on the other side. It is provided. A through hole 27 is formed in the base end portion of the tool holder 17, and a head engaging pin 28 loosely fitted in the through hole 27 is screwed onto the rod portion 24a of the pressing cylinder 24, thereby The base end of the holder 17 and the pressing cylinder 24 are interlockingly connected.

The pressing cylinder 24 is connected to a hydraulic control device (not shown). As shown by a solid line in FIG. 3, a neutral position for keeping the tool holder 17 in a neutral position and a rod portion 24a protruding for a constant stroke. , The upper dressing position where the upper tool 20 is pressed against the grinding surface 1a of the upper grindstone 1 with a constant pressing pressure, and the rod 24a is retracted by a constant stroke, and the lower tool 20 is ground with the constant pressing pressure of the lower grinding wheel 1. It is controlled so that it can be changed to a lower dress position that is pressed against the surface 1a. The rod 25a of the neutral cylinder 25 projects a predetermined stroke and abuts against the head of the engagement pin 27, thereby maintaining the tool holder 17 in the neutral position shown in FIG.

A worm wheel 31, for example, is fixed to the arm shaft 11, the worm wheel 31 meshes with a worm 32, and the worm 32 is interlocked with a variable motor 35 with a reduction gear via a joint or the like.

In FIG. 2, the bearing portion 13 is provided with limit switch mechanisms 31, 30 for controlling the moving positions of the left and right ends of the dress arm 12.

The mounting portion 17a of the tool holder 17 is formed in an annular shape having a slit 17b at one location, and can be reduced in diameter by a bolt 33 which is inserted over both side portions of the slit 17b and screwed into one portion. It is like this. The small diameter portion 20b of the dressing tool 20 is fitted into the mounting portion 17a and is fixed to the mounting portion 17a by tightening the bolt 33.

Next, the operation will be described. When the dress arm 12 is moved from the left end position of FIG. 2 to the intermediate position A corresponding to the outer peripheral end of the grindstone 1, the rod portion 24a of the pressing cylinder 24 of FIG. The tool 20 is pressed against the grinding surface 1a of the upper grindstone 1 with a constant pressing pressure, and in this pressing state, the dressing arm 12 is rotated to the right end position to dress the convex portion or the like of the grinding surface 1a.

During dressing, the dressing tool 20 is constantly pressed against the grindstone surface 1a with a constant pressing force in a direction perpendicular to the grindstone surface 1a. Also, the entire area to be corrected can be accurately dressed on the same plane.

When the dress arm 12 reaches the right end position, the dress arm 12 is temporarily stopped by the operation of the right end limit switch mechanism 30. Next, the dress arm 12 is reversed, dressed again, and then removed from between the grindstones 1 and stopped at the left end position by the left end limit switch mechanism 31.

When the dressing work of the upper grindstone 1 is completed, the rod portion 25a of the neutral cylinder 25 is once projected, and the rod portion 24a of the pressing cylinder 24 is pulled in by being pushed by the rod portion 25a of the pressing cylinder 24, and the rod portion of the pressing cylinder 24 is pulled. 24a is maintained in a neutral position. Next, while moving the dress arm 12 of FIG. 3 from the left end position to the right, the rod portion 24a of the pressing cylinder 24 is retracted at the intermediate position A (FIG. 2), and the lower dressing tool 20 is lowered. The dressing arm 12 is pressed against the grinding surface 1a of the side grindstone 1 with a constant pressing pressure, and in this pressed state, the dressing arm 12 is rotated to the right end position for dressing. The subsequent operation is the same as in the case of the above work.

[0018]

[Another embodiment]

 The illustrated embodiment is applied to a vertical type surface grinding machine in which the rotating main shaft is arranged vertically, but is also applicable to a horizontal shaft type surface grinding machine in which the rotating main shaft is arranged in a horizontal posture. As the pressing pressure applying mechanism, either a hydraulic cylinder or a pneumatic cylinder can be used.

[0019]

As described above, according to the present invention, the dressing tool 20 is constantly pressed against the abrasive surface 1a with a constant pressing pressure by the pressing pressure applying mechanism (pressing cylinder 24), and the dressing tool side is pressed. Since the dressing work such as dressing is performed by moving the dressing tool 20, even if the dressing tool 20 is worn when the dressing tool 20 contacts the convex portion of the grinding surface 1a during the dressing work. Since the pressing pressure is constant, it is possible to accurately set the entire area of the polishing surface to be corrected on the same plane.

Also, since the dressing tool 20 can be moved with respect to the rotary grindstone 1 by using the freely swingable dress arm 12, it is safer than when carrying out the work by hand. is there.

[Brief description of drawings]

FIG. 1 is a plan view of a dressing device for a surface grinder to which the present invention is applied.

FIG. 2 is an enlarged partial view of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 rotating grindstone 1a grinding surface 11 arm shaft 12 dressing arm 20 dressing tool 24 pressing cylinder (pressing pressure applying mechanism)

Claims (1)

[Scope of utility model registration request] 1. A dressing arm for dressing, which is swingable about an arm axis parallel to the axis of rotation as a fulcrum, is provided on the side of the rotary grindstone, and the dressing arm is substantially perpendicular to the grinding surface of the grindstone. A dressing device for a surface grinding machine, which supports a dressing tool so as to be movable in a predetermined direction, and is provided with a pressing pressure applying mechanism that presses the dressing tool against a grinding surface with a constant pressing pressure.