JPS5932259B2 - Moving table feeding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for feeding a movable table such as a grinding wheel head in a grinding machine.

SUMMARY OF THE INVENTION An object of the present invention is to provide a feeding device that keeps the depth of cut in the diametrical direction of a work piece constant even if the angle of the angular slide changes.

5 In an angular slide grinding machine, the grinding wheel head is advanced at a predetermined angle with respect to the axis of the workpiece, so in order to obtain the desired depth of cut in the diameter direction of the workpiece, a speed change means for the angle is generally provided by a feed system gear train. However, in universal grinding machines, the slide angle is changed depending on the machining purpose and is used for general purposes, so it is extremely difficult to accommodate this with a gear train. The operator performs the complicated and inefficient work of converting the amount into the feed amount in the diameter direction of the workpiece and then processing the feed.15
The current situation is that

In order to deal with such conventional problems, the present invention supports a base on which a rotating table is mounted, such that a pushing member having a pressing surface parallel to the workpiece axis is movable in a direction perpendicular to the workpiece axis. And the pressing of this pushing member! 0 surface, an abutting member operatively connected to a movable table slidably mounted on a swivel table is brought into contact with the feed means for moving the pushing member in a direction perpendicular to the workpiece axis. The depth of cut of the movable base in the diametrical direction of the workpiece can always be maintained at a constant value, regardless of changes in the sliding angle of the movable base.

Embodiments of the present invention will be described below with reference to the drawings. 1st
In the figures and FIG. 2, 1 is a bed, 2 is a base fixed to the bed 1, and a circular rotation guide member 3 is fixed thereto.

Reference numeral 4 denotes a swivel table which is placed on the base 2 so as to be able to rotate around the swivel guide member 3, and has a swivel guide surface 5 that fits around the outer periphery of the swivel guide member 3 so as to set the desired swivel position. is fixed on base 2.

5 A slide surface 6 is formed on the upper surface of the swivel table 4, and a grindstone head 7, which is a movable table, is slidably mounted thereon.

8 is a grinding wheel, and 9 is a motor for rotating this grinding wheel 8.

A fixed block 10 is fixedly installed on the swivel table 4 (or on the grinding wheel head 7 side), and a support member 11 that is slidable in the same direction as the moving direction of the grinding wheel head 7 is attached to the fixed block 10. It is fitted.

A follower roller 12 is rotatably supported on one end of the support member 11 by a shaft 13 as an abutting member. Further, the grindstone head 7 is provided with a rapid feed cylinder 14, whose piston rod 15 end is connected to the support member 11.
It is in contact with the other end surface. In addition, the fluoro roller 1
A pushing member 18 having a pressing surface parallel to the workpiece axis and in contact with the base 2 is pivoted to the base 2 by a shaft 17 so as to be swingable in a plane perpendicular to the workpiece axis. link 16
A roller 1 is provided at the upper end of the rotary link 16, and a roller 1 is provided at the lower end of the rotation link 16.
9 is rotatably supported.

A compression spring 20 is interposed between the rear end of the grindstone head 7 and the fixed block 10 as a biasing means.
The biasing force of the spring 20 pulls the grindstone head 7 in the backward direction to keep the follower roller 12 in constant contact with the pressing surface of the pressing member 18. This follower roller 12 is rolled and displaced along the pressing surface as the grindstone head 7 moves by the pressing member 18 . On the other hand, the roller 19 at the lower end of the rotary link 16 is in contact with the cam 26, as also shown in FIG. The cam 26 is rotated by the feed handle 21 or an automatic feed device (not shown). That is, a worm 23 is provided at the tip of a feed shaft 22 that is rotated by a feed handle 21, and this worm 23 meshes with a worm wheel 24 formed on a camshaft 25 orthogonal to the camshaft 25. The cam 26 is attached to the end of the camshaft 25. Therefore, the rotation of the cam 26 causes the rotation link 16 to swing about the shaft 17 via the roller 19, thereby moving the pushing member 18 back and forth. Reference numeral 27 denotes a table that slides on the bed 1 in front of the grindstone head 7 in a direction perpendicular to the moving direction of the pushing member 18.

28 is a headstock fixed on this table 27, w
indicates a workpiece held in a machining position by a chuck device or the like of the headstock 28.

Next, the operation of the apparatus of the present invention having the above configuration will be explained.

The grindstone head 7 is rotated at an arbitrary angle θ with respect to an axis perpendicular to the axis of the workpiece W held at a processing position by the rotation table 4. That is, the grindstone head 7 is tilted at a predetermined angle with respect to the workpiece axis. However, no matter what angle of inclination the whetstone head 7 is at, the fluoro roller 12
The pushing member 18, which is always in contact with the roller roller 12, is in contact with the roller roller 12 so as to push the follower roller 12 in a plane parallel to the workpiece axis. Now, supply pressure oil to the left chamber of the rapid feed cylinder 14 and
is located at the forward end of rapid traverse (the state shown in Fig. 1), and the cutting feed is applied from this position.

In this state, as shown in Fig. 2 and Fig. 4, the depth of cut
In this case, the feed handle 21 (or an automatic feed device may be used) is rotated in the forward direction of the grindstone head 7. This causes the feed shaft 22 to rotate, and the cam 26 to rotate in the direction indicated by the arrow in FIG. 3 via the worm 23, worm wheel 24, and camshaft 25. Therefore, the roller 19 in contact with the cam 26 moves according to the cam surface of the cam 26, and swings the rotary link 16 counterclockwise about the shaft 17 as a fulcrum. Therefore, the pushing member 18 moves forward in the P1 direction, that is, in the workpiece diameter direction by the cutting amount X, and the follower roller 1
Press 2. The driven follower roller 12 is moved forward to the grinding wheel head 7 via a support member 11 fitted to the fixed block 10 and a piston rod 15 which is in contact with the end face of this support member 11 and is locked by pressure. give. The forward movement direction of the grinding wheel head 7 is moved forward by the amount of cut X/COsθ in the P2 direction with the preset inclination angle θ, and the amount of cut X in the diameter direction of the workpiece is given to the grinding wheel 8. As described above, according to the device of the present invention, the pushing member having a pressing surface parallel to the axis of the workpiece is moved in the diametrical direction of the workpiece to give feed to the grinding wheel head, that is, the moving table. The feed amount in the workpiece diameter direction does not change even if the angle of This method has the advantage of not only eliminating the need for additional labor and improving work efficiency, but also having a simple mechanism and being able to be provided at low cost.

Furthermore, this embodiment has the advantage that the compression spring that biases the movable table in the backward direction eliminates backlash within the mechanism and provides highly accurate feed followability.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view of the device of the present invention, FIG. 2 is a sectional view taken along the line in FIG. 1, FIG. 3 is a sectional view taken along the line shown in FIG. It is a diagram. DESCRIPTION OF SYMBOLS 1...Bed, 2...Base, 3...Swivel guide member, 4...Swivel base, 6...Sliding surface, 7...Moving table (grindstone head), 8...Whetstone Car, 10... Fixed block, 11... Support member, 12... Contact member (follower roller), 14... Rapid feed cylinder, 15...
Rapid feed piston, 16... Rotating link, 18... Pushing member, 19... Mouth roller, 20... Biasing means (spring), 21... Feed handle, 22... Feed Axis, 23... Worm, 24... Worm wheel,
25...Cam shaft, 26...Cam.

Claims (1)

[Claims] 1. A swivel table is mounted on a base so that it can be rotated, and a movable table is mounted on a slide surface provided on the swivel table so that it can be slid in a direction intersecting the axis of the workpiece. , an abutting member is connected to a rapid-feeding piston provided on the moving table, and a pushing member having a pressing surface parallel to the workpiece axis is supported on the base so as to be movable in a direction perpendicular to the workpiece axis; A biasing means is provided for biasing the movable base in a direction in which the abutting member abuts on the pressing surface of the pushing member, and the biasing means causes the abutting member to move toward the pressing surface of the pushing member. A movable table feeding device comprising a feeding means for causing a contact member to displaceably contact a pressing surface as the table moves, and for moving the pressing member in a direction perpendicular to a workpiece axis. 2 The abutting member consists of a follower roller, and this follower roller is supported by a support member slidably fitted to the swivel base in the same direction as the sliding direction of the movable base, and this support member is connected to the fast-forwarding piston of the movable base. A moving table feeding device according to claim 1, which is connected to a movable table feeding device.