JPS62251052A - Rotary feed device for cylinder grinding machine - Google Patents

Abstract

PURPOSE:To enable execution of high-precise grinding processing, by providing two support rollers, mounted to a base bed, a drive roller, provided with a moving means and a rotary means and situated on the support rollers in a manner to incline a rotary shaft at a slight angle, and a stopper. CONSTITUTION:A drive roller table 17 is raised around a rocking axle 18 serving as a fulcrum through the medium of an air cylinder 19 and a piston rod 20, and a cylinder part 1, being a work, is placed on two support rollers 12 and 13 in a way to release a drive roller 21 and support rollers 12, 13 from contact therebetween. The drive roller 21 is lowered again to press the cylinder part 1 with a specified pressure. With the drive roller 21 driven with the aid of a motor 25 through the medium of a belt 26 and a pulley 24, the rotation axis of the work is coincided with the central axis of the cylinder part 1. Further, since a rotary axis C1 of the drive roller 21 has a slight angle with rotary axes C2 and C3 of the support rollers 12 and 13, a thrust force is exerted to prevent axial displacement of the work caused by press of the end surface of the cylinder part 1 against a stopper axially situated, enables application of high-precise grinding processing, and facilitates precise maintenance of a rotary device.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a rotary feed mounting for a cylindrical grinding machine.

[Conventional technology]

Conventionally, in order to support the workpiece in cylindrical grinding,
There are cases where the workpiece is supported based on the center hole, and cases where the outer diameter of the workpiece is gripped by placing it on a chuck. However, when grinding stepped parts, the reference surface of the moss also becomes a problem.

For example, in a workpiece 3 made of a cylinder 1 and a ring body 2.2' fitted into it as shown in FIG. 5, the ring body 2.2' is press-fitted after grinding the outer diameter of the circle fil+1. After that, the ring body 2.2' must be ground with high accuracy so that the runout of the outer diameter of the ring body 2.2' is within a predetermined tolerance value with respect to the outer diameter of the cylinder 1. In such a case, if the center hole 4 is provided on the end face of the cylinder 1 and the outer diameter of the cylinder 1 is machined based on the center hole 4, the outer diameter of the ring body 2.2' may be ground. When machining, the center hole 4 may be used as a reference. However, a problem arises when the outer diameter of the cylinder 1 is not machined with the center hole 4 as a reference, or when the cylinder 1 is a hollow cylindrical member and the center hole 4 is not provided.

In conventional mounting, in such a case, the cylinder 1 is gripped by chuck mounting and the ring body 2.2' is ground.

However, in order to ensure machining accuracy (run-out accuracy of the ring body 2.2' with respect to the cylinder 1), the center of the chuck placed on the chuck and the center of rotation must exactly match, and the center of the chuck placed on the chuck must be There was a problem in that it was extremely difficult to maintain the drawing accuracy on a daily basis. Furthermore, if a foreign object is caught between the chuck mounting and the workpiece 3, there is a problem in that the runout accuracy is greatly deteriorated.

[Problem that the invention seeks to solve]

The present invention has been made in order to solve the above problems, and it is possible to accurately hold and rotate a workpiece having different diameter parts with respect to the cylindrical surface as a reference, and also to It is an object of the present invention to provide a rotary feed mounting for a cylindrical grinding machine that allows grinding to be performed with extremely high runout accuracy and that allows easy maintenance of mounting accuracy.

[Means for solving problems]

Therefore, in the present invention, two receiving rollers whose center axes are parallel to each other and rotatably supported on a base, and a workpiece placed on the two receiving rollers are provided. a drive roller that can come into contact with it, a stopper that can come into contact with an end face of a workpiece placed on the receiving roller and that determines the axial position of the workpiece, and a drive that rotatably supports the drive roller. The drive roller includes a roller stand, a moving means for moving the drive roller stand with respect to the base, and a rotation means for rotationally driving the drive roller, and the drive roller applies a force to the workpiece by rotation of the drive roller. A cylinder supported on the driving roller stand so that its rotational center axis forms a slight angle with the rotational center axis of the receiving roller so that the axial component of the force is directed toward the stopper. A rotary feed mounting of the N-cutting machine is provided.

[Effect]

According to the above configuration, the workpiece has a cylindrical portion serving as a reference supported by the two receiving rollers, and is pressed and rotationally driven by the drive roller. Therefore, the rotational center axis of the workpiece exactly coincides with the center IItI line of the cylindrical portion serving as a reference. Since the accuracy is ensured by the roundness of the two receiving rollers and the parallelism of the rotation center axis, it is easy to maintain the placement accuracy.

In addition, since the drive roller is supported so that its rotational center axis forms a slight angle with the rotational center axis of the receiving roller, force can be applied to the workpiece not only in the rotational direction but also in the thrust direction. The workpiece can be rotated by being constantly pressed against the stopper, and the position of the workpiece in the axial direction does not shift (1° [Embodiment] An embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a sectional view of the rotary feed mounting according to the present invention, FIG. 2 is a side view, and FIGS. They are a top view, a front view, and a side view of a grinding machine. FIG. 1 corresponds to a sectional view taken along the line I--I in FIG. 3(a), and FIG. 2 corresponds to a view taken along the line .

Two receiving rollers 12.13 are rotatably supported on a substantially box-shaped base 11 by bearings 14.15, respectively. The two receiving rollers 12 and 13 have exactly the same shape, and a thin hard rubber material 16 is uniformly adhered to and coated on their cylindrical surfaces. The two receiving rollers 12 and 13 are supported on the base 11 so that their rotation center axes are precisely parallel.

A substantially box-shaped drive roller stand 17 is swingably supported by a swing shaft 18 provided at the upper part of the base 11. The drive roller stand 17 is connected to a piston rod 20 of an air cylinder 19 whose one end is fixed to the base 11, and is driven to swing by the air cylinder 19. The air ring 19 serves as a moving means for raising and lowering the drive roller stand 17 about the swing shaft 18 as a fulcrum.

On the drive roller stand 17, the drive roller 21 is mounted on the lees tray 22.2.
It is rotatably supported by 3. Like the receiving rollers 12, 13, the driving roller 21 has its cylindrical surface covered with a thin hard rubber material 16 uniformly adhered thereto. A boot 1724 is fixed to the shaft end of the drive roller 21, and is rotationally driven by a motor 25 attached to the drive roller stand 17 via a seamless V-belt 26.

As schematically shown in FIG. 4, the drive a-721 is arranged such that its rotation center axis C1 forms a slight angle θ with the rotation center axes C2 and C3 of the bearing rollers 12.13 in a substantially horizontal plane. is supported on a driving sealer stand 17. As shown in FIG. 1, a bracket 27 is fixed to the base 11.
A stopper 28 is fixed to. The stopper 28 is 2
It can come into contact with the end surface of the workpiece 3 held between the book receiving rollers 12, 13 and the driving roller 21.

The base 11, the drive roller stand 17, the receiving rollers 12, 13, the drive roller 21, the motor 25, etc., which have been described above, constitute the up-rotation and feed mounting. As shown in FIG. 3, the base 11 that supports the entire rotary feed mounting is supported by a main body base 32 fixed on the table 31 of the cylindrical grinder in the axial direction of the receiving rollers 12 and 13 (FIG. ), (b
), it is guided and movable in the left-right direction). Then, the distance between the workpiece 3 and the grinding wheel 33 is appropriately adjusted according to the shape and dimensions of the workpiece 3, and the workpiece 3 is clamped and used.

Based on the above configuration, the workpiece 3 shown in FIG.
This will be explained using the grinding process as an example.

The workpiece 3 is a part with different diameters, which is made up of a polished cylinder 1 and an annular body 2.2' fitted therein. The outer diameter portions of the ring bodies 2, 2' are ground so that the deflection of the outer diameter of the ring body 2.2' is below a permissible value based on the polished outer diameter portion (cylindrical surface) of the circle fi 211. It is assumed that there is no center hole 4.

First, the air cylinder 19 is operated to raise the drive roller stand 17 and open the space between the drive roller 21 and the receiving rollers 12,13. Next, the workpiece 3 is placed so that the cylindrical portion 1 serving as a reference is in contact with the two receiving rollers 12 and 13. At this time, the end surface of the cylindrical portion 1 is brought into contact with the stopper 28. Next, drive the air cylinder 19 to drive the drive a-ra stand 1.
7 is lowered, and the drive row 721 presses the cylindrical portion 1 of the workpiece 3 with a constant pressure. When the motor 25 is driven to rotate, the workpiece 3 is rotated while the cylindrical portion 1 serving as a reference is supported by the three rollers 12, 13 and 21.

The rotation center of the workpiece 3 coincides with the central axis of the reference circle #1 section 1.

Further, as shown in FIG. 4, the rotational center axis C1 of the driving roller 21 is aligned with the rotational center axis C2, C3 of the receiving rollers 12.13.
Therefore, the force F1 transmitted from the drive roller 21 to the cylindrical portion 1 of the workpiece 3 is not only a force component F2 in the rotational direction of the workpiece 3, but also a force in the axial direction. It has component F3.

Therefore, the workpiece 3 is constantly pressed against the stopper 28 and rotated, and its position in the axial direction does not shift.

In this way, the workpiece 3 is rotated around the central axis of the cylindrical portion 1, so that the grinding wheel 33 is fed and the ring body 2.
The outer diameter of ′ can be ground with high runout accuracy.

Workpieces of different shapes can be handled by replacing the stopper 28 and adjusting the position of the base 11 on the main body base 32.

This embodiment has the following advantages.

(1) Two receiving rollers 12, 13 and driving roller 21
Since the cylindrical surface of the workpiece 3 is covered with a hard rubber material 16 that is softer than the workpiece 3, there is no risk of damaging the workpiece 3, especially the cylindrical portion 1 that serves as a reference.

(2) Three rollers 12, 13 that hold the workpiece 3.
21 is constantly rotating, so even if a foreign object is caught between the workpiece 3 and the rollers 12, 13, and 21, it can be expected that it will be ejected immediately, and the center will only shift momentarily. Therefore, the influence on machining accuracy is extremely small. Furthermore, it is also possible to attach a foreign matter removal mounting to each roller 12, 13, 21 to reliably prevent center runout due to foreign matter being caught.

(3) The run-out accuracy of the rotation center axis of the workpiece 3 with respect to the center axis of the cylindrical portion 1 is guaranteed by the roundness of the two receiving rollers 12.13 and the parallelism of the two receiving rollers 12.13. Therefore, there is no need to perform centering adjustment unlike when mounting on a chuck, making it extremely easy to maintain and manage accuracy.

〔Effect of the invention〕

As explained above, the present invention has the above-mentioned configuration, supports the cylindrical part that is the reference of the workpiece by three rollers, and rotates the workpiece, so it is possible to use the workpiece having different diameter parts. It has the excellent effect of being able to perform grinding with extremely high runout accuracy. Further, there is an effect that it is easy to maintain accuracy in rotational feeding and placement.

[Brief explanation of drawings]

Figures 1 to 4 show an embodiment of the present invention, with Figure 1 being a cross-sectional view of the rotary feed placement, Figure 2 being a side view, and Figure 3(a)
, (b) and (e) are a plan view, a front view, and a side view showing a cylindrical grinder in which the mounting according to the present embodiment is used, and FIG. 4 is a plan view schematically showing the operation of the rollers. FIG. 5 is a plan view showing an example of a workpiece having a different diameter portion. 1... Cylindrical part, 3... Workpiece, 11... Base,
12.13...Receiving roller, 16...Hard rubber material, 1
7... Drive roller stand, 19... Air cylinder, 21
... Drive roller, 25 ... Motor, 28 ... Stopper, 33 ... Grinding wheel. 1'ff: ''':'1 Figure 3 (a) (b)

Claims (1)

[Scope of Claims] 1. Two receiving rollers whose rotation center axes are parallel to each other and rotatably supported on a base, and a workpiece placed on the two receiving rollers comes into contact with the workpiece. a stopper that can come into contact with the end surface of the workpiece placed on the receiving roller and determines the axial position of the workpiece, and a drive roller stand that rotatably supports the drive roller. a moving means for moving the drive roller stand relative to the base; and a rotation means for rotationally driving the drive roller; A cylindrical grinding machine, characterized in that the cylindrical grinding machine is supported on the drive roller stand so that its rotation center axis forms a slight angle with the rotation center axis of the receiving roller so that the axial component force is directed toward the stopper. Rotary feed mounting. 2. The rotary feeding mounting of a cylindrical grinding machine according to claim 1, wherein the cylindrical surfaces of the driving roller and the receiving roller are coated with a soft material.