JPS60146676A - Grinding head - Google Patents

Abstract

PURPOSE:To greatly save labor and time for grinding process and make the quality of grinding uniform by equipping a grinding head with a built-in automatic reciprocating feed mechanism and by providing a control device to switch this reciprocating motion. CONSTITUTION:With the pressure fluid supplied into a second pressure chamber 16b of a fluid pressure room 16 in a cylinder body 10, a piston 17 and sliding shaft 15 are pushed and slided forward, and a grinding wheel 23, which is being rotated by an air motor 18, is automatically moved forward to grind the surface of a work. Next, when the sliding shaft 15 slides over the prescrived distance, a detector ring 26 engages with a mechanical valve 28, and the supply source of pressure fluid is changed from the second pressure chamber 16b to the first pressure chamber 16a; then, the piston 17 and the sliding shaft 15 slide backward and the grinding wheel 23 is automatically moved backward to grind the work surface. And, when the sliding shaft 15 slides over the prescribed distance, the detector ring 26 engages with a mechanical valve 27 and the supply source of pressure fluid is changed to the second chamber 16b again. Then the sliding shaft 15 moves forward again.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a small-sized grinding head device having a built-in automatic feed mechanism, and more particularly to a grinding head device suitable for grinding the inner surface of a large machine.

Grinding heads are used for grinding workpieces, the inner surface of holes, etc., but conventional grinding heads do not have a cutting mechanism or a two-rotation drive mechanism, and are used by being attached to a rotation drive device. Even in such cases, it was necessary to provide a separate feed mechanism metal.

In addition, even when this grinding head is attached to a rotary drive device equipped with a feed PA mechanism, such as a lathe, a milling machine, a boring machine, etc., the feed operation can be performed manually.
The feed direction had to be changed manually. For this reason, the finish of the processed product varies depending on the surface roughness, grinding allowance, material, etc., and the grinding feed speed, number of reciprocating movements, etc. of the grinding process vary, which is not only time-consuming but also causes an increase in processing time. As a result, it has been difficult to achieve uniform quality of the finished surface. Furthermore, since a lathe, milling machine, boring machine, etc. is used as the rotary drive device, 1. There was a problem with the overall size of the grinding device. Also, conventionally, milling machines, boring machines, etc.
In machine tools where the spindle acts only in the direction of the center of the spindle, it is impossible to grind a machined surface that is inclined relative to the mounting base, such as the inner surface of a tapered hole. There was a request.

In view of the problems and demands of the conventional grinding head, the present invention has been developed to automatically control feed and feed p switching, thereby reducing machining time and improving machining quality. It is an object of the present invention to provide a small-sized grinding hand device which is easy to manage and also allows easy grinding of a workpiece having a machined surface inclined with respect to a mounting base.

The structure of the grinding head device of the present invention that achieves this object includes: a support body having a fluid pressure chamber connected to a pressure fluid supply source and having a piston reciprocating within the fluid pressure chamber; and a support body connected to the piston. a grinding wheel mounted on the sliding body so as to be rotatable around an axis parallel to the reciprocating direction of the sliding body; a means for controlling the forward motion of the piston by detecting the end of the reciprocating motion and switching the supply of pressure fluid to the fluid pressure chamber; and a support body and a mounting base for holding the support body. The present invention is characterized in that it includes an angle adjustment plate interposed between the mounting base and the angle adjusting plate that can adjust the inclination Kl of the sliding body in the reciprocating direction with respect to the mounting base.

Below, regarding one embodiment of the grinding head device according to the present invention, FIG.
This will be explained in detail with reference to FIG. 2, which shows the right side shape of the grinding head device shown in the figure.

The grinding hend device 1 of this embodiment is mounted, for example, on the upper surface of a mounting base 2 on a machine tool side, and constitutes a grinding device as a whole. Grinding head device 1! jl is fixed in a state where the mounting base 2 is clamped by screwing the mounting plate 3 and the presser foot 4 together with bolts 5, and by loosening this bolt 5, the grinding hand device 1 is attached to the mounting base 2. It is movable along the long groove 2aK. Further, a contact plate 6 is attached to the mounting plate 3, and this contact plate 6 serves as a guide when moving the grinding head device 1t-length@2a and setting the position with respect to the mounting base 2. An annular holding metal fitting 7 having a flange 7ai on the inside 1'll is fixed to the mounting plate 3 with bolts 8.
This holding hardware 7 includes a cylindrical core metal 9 having a stepped portion 9ai.
is loosely fitted so as to be freely rotatable around its axis, so that it cannot be removed from the holding hardware 7. A substantially cylindrical cylinder body 10 as a support is fixed to the core bar 9 by a pole 11, and this cylinder body 10 is attached to a core bar 9' (which is rotatable with respect to the mounting base 2 as an i-axis). Furthermore, as shown in FIG. 2, a pair of angle adjusting plates 12a, 12b are installed between the cylinder main body 10 and the mounting plate 3 with bolts 13a, 13b.
These angle adjustment plates 12a,
By appropriately setting the plate thicknesses H1 and H21i of the cylinder body 12b, the inclination of the cylinder body 10 with respect to the upper surface of the mounting base 2 can be adjusted.

Cloud-shaped bearing covers 14a are provided at both ends of the cylinder body 100,
14b are tightly fixed, and these bearing covers 1
4a and 14b are positioned coaxially, and their inner diameters are set to be the same. A sliding shaft 15, which is a cylindrical sliding body with a smaller diameter than the cylinder main body 10, coaxially passes through the cylinder body 10. It is supported so as to be slidable in a direction parallel to the direction. That is, when the cylinder body 10t is installed with an inclination relative to the mounting base 2 as described above, the slide #115 slides with respect to the mounting base 2 in a direction having the same inclination as the cylinder body 10.

The cylinder body IO is an inner circumferential surface of this cylinder body 10,
The outer peripheral surface of the sliding J14115 and the bearing cover 14a.

It has a fluid pressure chamber 16 defined by 14b, and a piston 17 accommodated in this fluid pressure chamber 16 is attached to the sliding shaft 15.
A first pressure chamber 16a and a second pressure chamber 16a are integrally fixed to each other, and the fluid pressure chamber 16 is connected to a pressure fluid supply source (not shown), respectively.
It is divided into two parts, a pressure chamber 16b, and a double-acting cylinder as a whole.

An air motor 18 is housed within the sliding shaft 15.
This air motor 18 is connected to a compressed air supply source (not shown). The air motor 18 is screwed and integrally connected to a substantially cylindrical bearing case 19, and the bearing case 191 is fixed to the sliding shaft 15 coaxially and non-rotatably.

The output shaft 18a of the air motor 18 is connected to the base end of the grindstone shaft 21 via a universal joint 20, and the output shaft 18a and the grindstone shaft 21 are coaxially located. The grinding wheel shaft 2 is rotatably supported in the bearing case 9 via shelf supports 22a and 22b, and the grinding wheel 23 is attached to the tip of the grinding wheel shaft 21 that protrudes from the bearing case 19. are fastened so that they rotate together coaxially. A seal member 24 is in sliding contact with the grinding wheel shaft 21 to prevent dust. A portion of the grinding wheel 23 is covered by a cover 25, and the cover 25 is fixed to the cylinder body 10 together with the bearing cover 14a. A diamond dresser 25a is screwed onto the cover 25 so that its protrusion amount can be adjusted, and the diamond dresser 25a/d dresses the grinding wheel 23.

A detection ring 26 is screwed onto the rear end of the sliding shaft 15, and this detection ring 26 is attached to a mechanical valve 27, 28 (
(conceptually shown in FIG. 1) to perform pulp opening/closing operations. Mechanical pulp 27.2
8 is attached to a mounting bracket 29.30 protruding from the cylinder body 10 with a screw 31, as shown in FIG. The reciprocating stroke of the sliding shaft 15 can be set as appropriate. Detection ring 26 and mechanical valve 27.
28 is a control means t-et that detects the reciprocating end of the sliding shaft 15 and switches the supply of pressure fluid to the fluid pressure chamber 16, and includes a detection ring 26 and a mechanical valve r27.
．． 28 is engaged, the first pressure chambers 16a and 1
The supply of pressure fluid to and from the @2 pressure chamber 16b is switched, and the reciprocating movement of the sliding shaft 15 is switched.

Next, the operation of the grinding head device 1 will be explained. First, compressed air is supplied to the air motor 18 from a compressed air supply source (not shown), and the output shaft 18affi is driven and rotated, and the universal joint 20. Grindstone shaft 21? ! - rotate the grinding wheel 23' through the At this time, the rotational vibration of the near motor 180 is absorbed by the universal joint 20, and the rotation of the grinding wheel 230 has low vibration, which is suitable for grinding. Next, the second pressure chamber 1 is supplied from a pressure fluid supply source (not shown).
Piston 17, sliding 1 due to the pressure fluid supplied to 6b
The curve 15 slides forward (to the left in FIG. 1), and the grinding wheel 23 is automatically fed forward to grind the machined surface. Next, when the sliding shaft 15 or 131 slides (forward movement) a certain distance, the detection ring 26 is engaged with the mechanical valve 28, and the pressure fluid is supplied from the second pressure chamber 16b to the first pressure chamber 16a. Switched, now piston 17. The sliding shaft 15 releases the force (
At the same time, the grinding wheel 23 is automatically fed in a backward motion to grind the machined surface. Then, when the sliding shaft 15 slides a predetermined distance (backward movement) in the same manner as described above, the detection ring 26 engages with the mechanical valve 27 and the pressure fluid is supplied from the first royal chamber 16a to the second pressure chamber 16b.
The program is switched again to , and the writing mk starts. i.e. mechanical valve 27.28
By setting the position and interval of the grinding wheel 2
3 can perform grinding by reciprocating a predetermined range of processing surfaces.

'i, square plate 71M of angle adjustment plates 12a and 12b,
.

By appropriately shortening Lk and tilting the cylinder body 10 with respect to the mounting base 2, the feed and direction of the grinding wheel 23 can be tilted with respect to the mounting base 2 on which the workpiece is placed and fixed. For example, it is possible to easily grind a machined surface that is inclined with respect to the mounting base 2, such as the inner surface of a tapered hole.

As mentioned above, the grinding head device 1 of this embodiment has the port 5
It can be moved by loosening the bolt ia
a, 1abt- By loosening it, it can be rotated around the core bar 9, and its position and orientation can be freely set while it is attached to the mounting base 2. When the grinding head device 1 is rotated, the core metal 9 is prevented from being removed from the holding metal 7, so the grinding head device lt cannot be removed.
Even when installed on the side or bottom surface of the stand 2, the cutting hend device 1 will not fall off the mounting stand 2, and workability is extremely good. Furthermore, the grinding wheel 23 is kept in a good condition by being strained by a tire drainer 25a every time it is fed.

f^j1 In the above embodiment, the support body and the sliding body are cylindrical, but for example, a rail-shaped member with a cylinder at the end may be used as the support, or the sliding body may be attached to this rail-shaped member. The support body and the sliding body may be guided to slide, and the shapes of the support body and the sliding body are not limited to the above embodiments. Further, the air motor may be a well-known type such as an electric motor. In addition, the control means is not limited to a mechanical valve type, but may also be a known mode having a position detection and switching function, such as a one-stroke type using a rim switch or the like, or a previous type that uses light to detect the position. It could be something like that.

As explained above, according to the present invention, the grinding head device is equipped with a built-in automatic reciprocating mechanism and a control means for switching this reciprocating motion, so that the grinding process is more labor-intensive than in the past. , time, etc. can be greatly reduced, and the grinding quality can also be made uniform. Also,
Because grinding feed can be done without using a large machine in front of the lathe,
The entire grinding device can be downsized to a size of 1. In addition, because the angle adjustment plate allows the body stone wheel to be tilted as appropriate in the feeding direction (11-) relative to the grinding table, it is possible to easily grind machining areas that are inclined relative to the mounting table, such as the inner surface of a taper hole. It can be realized.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 are diagrams showing an embodiment of the lUf cutting device according to the present invention, and FIG.
FIG. 2 is a right side electrogram of that in FIG. In the drawing, 2 is a U stand, 10 is a cylinder main body, 12a, 12b are angle adjustment plates, 15 is a sliding shaft, 16 is a fluid pressure chamber, 17 is a piston, 23 is a grinding wheel, 26 is a detection ring, 27.281'j:, 7' canical pulp. Patent applicant Mitsubishi Heavy Industries, Ltd.

Claims (1)

[Claims] □ A support body having a fluid pressure chamber connected to a pressure fluid supply source and having a piston that reciprocates throughout the fluid pressure chamber, and a sliding body connected to the piston and supported by the support body so as to be able to reciprocate. , a grinding wheel attached to this sliding body so as to be rotatable around an axis parallel to the reciprocating direction of the sliding body, and a grinding wheel that detects the reciprocating end of the sliding body and supplies pressure fluid to the fluid pressure chamber. A control means for switching the reciprocating motion of the piston by completely switching the feed, and a control means interposed between the support body and a mounting base for holding the support body to control the reciprocation direction of the sliding body with respect to the mounting base. A grinding head device characterized by comprising an angle adjustment plate capable of adjusting the inclination. −