JP2007030079A - Gear grinding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To dispense with a feed mechanism exclusively for a dressing wheel and to perform high-accuracy dressing. <P>SOLUTION: One 2 of a pair of tables linearly moving in the directions intersecting perpendicularly to each other on a bed 1 is provided with a grinding wheel 6, and the other table 3 is provided with a work gear 8 and a dressing device 9, whereby the work gear 8 or the dressing device 9 is selectively made opposite to the grinding wheel 6 in a plan view by the movement of the table 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a gear grinding device, and more particularly to a dressing device attached thereto.

  An example of a gear grinding device provided with a dressing device is disclosed in Patent Document 1. In this gear grinding apparatus, the dressing wheel advances into the space between the grinding wheel and the workpiece gear during dressing. This advancing mechanism is provided with a swivel arm that can swivel in a vertical plane, and a bearing base of a dressing wheel is mounted on the tip of the swivel arm. At the time of dressing, the above-mentioned swivel arm turns from the outside into the space created by separating and retreating the grinding wheel from the work gear, and the dressing wheel supported at the tip of the turning wheel moves in reverse so that it faces the grinding wheel. Be positioned.

Thereafter, the grinding wheel is moved relative to the dressing wheel by the same feed mechanism as that for grinding, and the grinding wheel is dressed by the dressing wheel. In such a gear grinding apparatus, it is possible to perform dressing by using a grinding wheel feeding mechanism without providing a dedicated feeding mechanism for the dressing wheel, and to turn the dressing wheel back and forth during grinding. Thus, the grinding operation can be performed smoothly.
JP 2003-39237 A

  However, in the conventional gear grinding apparatus, it is difficult to position the dressing wheel in micron units due to the backlash of the turning mechanism, etc., and there is a risk that the dressing accuracy may not be achieved.

  Therefore, the present invention solves such a problem, and an object of the present invention is to provide a gear grinding apparatus that does not require a feeding mechanism dedicated to a dressing wheel and can perform high-precision dressing.

  In order to achieve the above object, in the present invention, a grinding wheel (6) is provided on one (2) of a pair of tables that are linearly movable in a direction orthogonal to each other on the bed (1), and the other table (3 ) Is provided with a work gear (8) and a dressing device (9), and by moving the other table, the work gear (8) or the dressing device (9) is selectively viewed in plan with respect to the grinding wheel (6). It is made to oppose.

  In the present invention, the dressing device is provided on the same table as the work gear, and by changing the moving position of the table, grinding is performed with the work gear opposed to the grinding wheel, or to the grinding wheel. Dressing is performed with the dressing device (dressing wheel) facing each other. Accordingly, it is not necessary to provide a feeding mechanism dedicated to the dressing device, and the dressing device can be positioned with high accuracy without any play by the table, so that precise dressing can be performed.

  In addition, the code | symbol in the said parenthesis shows the correspondence with the specific means as described in embodiment mentioned later.

  As described above, according to the present invention, it is not necessary to provide a feeding mechanism dedicated to a dressing wheel, and highly accurate dressing can be performed.

  FIG. 1 shows the external appearance of a gear grinding device provided with a dressing device. In FIG. 1, plate-like tables 2 and 3 are provided on a bed 1, and these tables 2 and 3 are respectively placed on parallel guide rails 41 and 42 laid in directions orthogonal to each other, and ball screws It is moved linearly along the guide rails 41 and 42 by the mechanisms 43 and 44.

  A grindstone column 5 is erected on the table 2, and a table 61 is installed between parallel rails 45 provided in the vertical direction on the column 5 so as to be moved up and down by a ball screw mechanism 46. A grindstone head 63 is horizontally supported on the table 61 via a rotary table 62, and the grindstone 6 is attached to one end of the grindstone head 63, and is rotated around a horizontal rotation shaft 64. With the above structure, the grinding wheel 6 can be linearly moved in the X-axis (cutting) direction in the horizontal plane parallel to the bed 1 and in the Z-axis (vertical feed) direction in the vertical plane perpendicular to the bed 1, and the rotary table. 62 can be turned around the central axis V axis.

  A work column 7 is erected on the longitudinal half of the table 3, and an upper grindstone spindle 72 projects from the lower surface of the tip of the support arm 71 projecting sideways from the upper end of the table 3. The work gear 8 is held in a horizontal posture with the lower grinding wheel spindle 73. A dressing device 9 is placed on the other half of the table 3. The dressing device 9 has a pair of parallel dressing wheels 93 and 94 disposed between left and right motor housings 91 and 92. With the above structure, the work gear 8 and the dressing device 9 on the table 3 can be linearly moved integrally in the Y-axis direction orthogonal to the X-axis (cutting) direction in the horizontal plane.

  In the gear grinding apparatus having such a structure, when the work gear 8 is ground, the table 3 is placed on the guide rail 42 so that the work gear 8 faces the grinding wheel 6 in plan view as shown in FIG. Along the Y-axis. In this state, the vertical position (Z axis) and turning position (V axis) of the grinding wheel 6 are adjusted, and the work gear 8 is ground with an appropriate cutting amount (X axis) while rotating the grinding wheel 6.

  When dressing the grinding wheel 6, the table 3 is moved in the Y-axis direction so that the dressing wheels 93 and 94 face the grinding wheel 6 in a plan view as shown in FIG. 3. In this state, the vertical position (Z axis) and the turning position (V axis) of the grinding wheel 6 are adjusted, and the grinding wheel 6 is rotated with the appropriate cutting amount (X axis) while rotating the dressing wheels 93 and 94 and the grinding wheel 6. Dressing.

  According to such a gear grinding apparatus, since the dressing device 9 is provided on the same table 3 as the work gear 8, it is not necessary to provide a dedicated feed mechanism for the dressing wheels 93 and 94, and the dressing is performed by the table 3. Since the wheels 93 and 94 can be positioned with high accuracy without play, precise dressing can be performed.

1 is an overall perspective view of a gear grinding apparatus showing an embodiment of the present invention. It is a schematic plan view of the gear grinding apparatus at the time of workpiece gear grinding. It is a schematic plan view of the gear grinding apparatus at the time of dressing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Bed, 2, 3 ... Table, 6 ... Grinding wheel, 8 ... Work gear, 9 ... Dressing apparatus.

Claims (1)

A grinding wheel is provided on one of a pair of tables that are linearly movable in directions orthogonal to each other on the bed, and a gear work and a dressing device are provided on the other table, and the gear work or the dressing device is provided on the grinding wheel. A gear grinding apparatus characterized by being selectively opposed in a plan view.

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