JPH045240Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is equipped with a pair of vertical rotation shafts, upper and lower, centered on the same axis, and a grindstone is detachably fixed to the opposing ends of both rotation shafts, and the grindstone is rotated. The present invention relates to a vertical double-head surface grinding machine equipped with a carrier disk that passes between both grinding wheels and supplies a workpiece between the grinding wheels.

(Prior art and its problems) When replacing the grinding wheel in a conventional surface grinder of this type, for example, a guide plate or a roller guide device is laid down, the grinding wheel is placed on it, and the grinding wheel is pushed and moved by hand. It even moves to parts.

Therefore, it takes a lot of time to replace the grindstone, and the efficiency of the replacement work is poor.

(Purpose of the invention) The purpose of the invention is to improve the efficiency of grindstone replacement by making it possible to replace the grindstone easily and in a short time.

(Means for Achieving the Object) In order to achieve the above object, the present invention has a grindstone exchange arm on which a grindstone can be mounted, which is rotatably arranged via a vertical support shaft, and the arm has a shape that fits the outer circumference of the grindstone. A guide stepped portion is formed along the outer circumference of the rotating shaft flange, and an arcuate recessed portion is formed along the outer circumference of the rotating shaft flange.
It is rotatable between an internal position where it enters the lower side of the lower grindstone and the centers of the arc-shaped recess and the guide step substantially coincide with the center of the rotating shaft, and an external position outside the machine.

(Function) When replacing the whetstone, the used whetstone removed from the rotating shaft is placed on the replacement arm at the internal position, and the arm is rotated to the outside position to take out the whetstone to the outside of the machine. The new grindstone is then placed on the replacement arm, carried by rotation of the arm to an internal position corresponding to the rotation axis, and attached to the rotation axis.

(Example) In FIG. 4 showing a front view of a vertical double-head surface grinder to which the present invention is applied, a pair of vertical rotating shafts 5 and 6, upper and lower, are rotatably supported on the machine body 1. Both rotating shafts 5 and 6 are aligned on the same axis, and are each operatively connected to a rotating shaft drive device (not shown) via a belt transmission mechanism. Flanges 5a, 6a are formed at opposing ends of both rotating shafts 5, 6, respectively, and grinding wheels 7, 8 are fixed to each flange 5a, 6a, and both grinding wheels 7, 8 face each other with a grinding gap in between. are doing. A grinding fluid supply passage 29 is formed in the upper rotating shaft 5, and is adapted to supply grinding fluid to the portion between the grindstones. The positions of both rotating shafts 5 and 6 in the vertical direction can be adjusted using position adjustment handles 19 and 20.

To the right of the grinding wheels 7 and 8 is a horizontal carrier disk 15.
The carrier disk 15 is fixed to a vertical rotating shaft 17 and rotated by a disk drive device 16 so as to pass between the grindstones while rotating. Although not shown, the carrier disk 15 has a plurality of workpiece holding pockets spaced apart in the circumferential direction, and the workpieces are held in the pockets and fed between the grinding wheels.

Both grindstones 7 and 8, parts of both rotating shafts 5 and 6, and a part of carrier disk 15 are housed in a box-shaped grindstone guard 12, and grindstone guard 12 is fixed to machine body 1. The grindstone guard 12 is provided with an L-shaped inspection door 33 extending from its front wall to the left wall, and the door 33 is supported by the grindstone guard 12 via a hinge so as to be freely openable and closable. It can be opened to the left as shown.

In FIG. 1, which is an enlarged cross-sectional view of FIG. , the spindle stand 23 is fixed to the bottom wall of the grindstone guard 12. A boss portion of a grinding wheel replacement arm 22 is rotatably fitted and supported on the support shaft 21, and a guide stepped portion 27 that follows the outer circumference of the grinding wheel 8 is formed on the arm 22, and a rotating shaft flange 6a is formed on the arm 22. An arc-shaped recess 22a is formed along the outer circumference of the arm 22 (FIG. 1), and the grindstone 8 can be placed on the arm 22. The stepped portion 27 and the recessed portion 22a are formed concentrically.

The arm 22 is rotatable around the support shaft 21 between an internal position shown by a solid line and an external position shown by a phantom line,
The internal position is a position where the centers of the recessed portion 22a and the stepped portion 27 coincide with the rotational axis center O, and the external position is a position where most of the arm 22 protrudes in front of the grindstone guard 12. Of course, the rotation range of the arm 22 is such that it does not interfere with the right carrier disk 15.

Further, a dresser 25 is provided at the left rear end portion of the grindstone guard 12 so as to be rotatable about a vertical support shaft.

In FIG. 2, which is an enlarged cross-sectional view of FIG. It is being The arm 22 can be easily pulled out upward relative to the support shaft 21, and its height can be changed by using thrust receiving plates 31 of different heights. However, in FIG. 2, the upper surface of the arm 22 is set so as to be approximately aligned with the upper surface of the lower flange 6a.

Each grindstone 7, 8 has a mounting bolt 36, 37, respectively.
It is attached to and detached from the upper and lower flanges 5a and 6a.

Next, the operation will be explained. A workpiece held by a rotating carrier disk 15 in FIG. 4 is ground between both grindstones 7 and 8. Both surfaces of the workpiece are ground while passing between the grindstones 7 and 8. During grinding work, the
The arm 22 in the figure has been removed from the support shaft 21, and the door 33 is of course closed.

When replacing the whetstones 7 and 8, for example, remove the bolts 36 and 37 shown in FIG. 2, place both the whetstones 7 and 8 on the lower flange 6a, and then
2 is fitted onto the support shaft 21 and rotated to the internal position indicated by the solid line in FIG. The arm 22 is then rotated to the outside position, and the used grindstones 7 and 8 are removed by, for example, a forklift.

Next, new upper and lower grindstones 7 and 8 are stacked and placed on the arm 22 at the external position, and the arm 22 is rotated to the internal position to align the centers of the grindstones 7 and 8 with the center of rotation O. Then, the upper rotary shaft 5 is lowered a little, and the upper grindstone 7 is fixed to the upper flange 5a with bolts 36, and the lower grindstone 8 is fixed to the lower flange 6a with bolts 37.

After installing both grindstones 7 and 8, return the arm 22 to the external position, remove it from the spindle 21, and open the door 3.
3 and move on to the next grinding operation.

(Another embodiment) (1) In the illustrated embodiment, the spindle 21 is connected to the grindstone guard 12.
The arm 22 is rotatably supported on the support shaft 21, but a boss portion is formed on the grindstone guard 12, and the arm 22 having the support shaft 21 integrally is rotatably supported on the boss portion. It can also be inserted.

(2) The arm 22 or the support shaft 21 may be coupled to a drive device such as a step motor and driven by the drive device.

(3) As shown in Figure 5, attach the grinding wheel guard 12 to the machine body 1.
The supporting legs 41 are arranged at intervals from the supporting legs 41.
The present invention can also be applied to a grinding machine supported through a heat insulating material 43. In FIG. 5, 44 is a grinding fluid discharge pipe, and 45 is a heat insulating plate disposed between the machine body 1 and the rear surface of the grindstone guard 12.

According to the structure shown in FIG. 5, the grinding fluid is discharged only through the inside of the grindstone guard 12, and the grindstone guard 12 is connected from the machine body 1 to the support leg 41 and the heat insulating material 43.
Since the machine body 1 is isolated by the grinding fluid, thermal deformation of the machine body 1 due to the grinding fluid can be effectively prevented.

(Effects of the invention) As explained above, in the present invention, the grindstone exchange arm 22 on which a grindstone can be placed is rotatably arranged via the vertical support shaft 21, and the arm 22 is arranged to correspond to the rotation axis center O. Since it is rotatable between the internal position and the external position outside the machine, the following: (1) The grindstone can be placed on the arm 22 and easily moved from the inside of the machine to the outside or from the outside to the inside of the machine.

That is, when replacing the grindstone, the used grindstone can be easily taken out of the machine by simply rotating the arm 22 from the internal position to the external position, and a new grindstone can be easily replaced by simply rotating the arm 22 from the external position to the internal position. Since it can be carried up to the rotating shaft, the efficiency of the grindstone replacement work is improved.

(2) Arm 2 for replacing the grinding wheel using the so-called swing method
2 is supported rotatably, the structure is simple and the arm arrangement space is also compact.

(3) In addition, the arm 22 is formed with a guide step 27 that follows the outer circumference of the grinding wheels 7 and 8, and an arcuate recess 22a that follows the outer circumference of the rotating shaft flange 6a, so that the arm 22 is in the inner position. At times, the arm 22 enters the lower side of the lower whetstone 8 so that the centers of the arcuate recess 22a and the guide stepped portion 27 approximately coincide with the center of the rotation axis, so when removing the whetstone, the arm 22 is positioned at the internal position. If you do so, you can simply remove the whetstones 7 and 8 and place them on the arm in a stable state, and when installing a new whetstone, place the whetstone on the guide step 27.
The grindstones 7 and 8 can be set coaxially with the axis of rotation by simply placing them along the axis and bringing them to the internal position.

That is, it becomes easy to align the grindstone with respect to the rotating shaft, to attach and detach it, and to load and unload the grindstone onto the arm, and the condition of the grindstone being moved by the arm is stabilized, making the moving operation easier.

[Brief explanation of the drawing]

Figure 1 is an enlarged horizontal cross-sectional view of the grinding wheel portion of a double-head surface grinder to which the present invention is applied (an enlarged cross-sectional view in Figure 4), Figure 2 is an enlarged partial view in cross-section in Figure 1, and Figure 3 is an enlarged cross-sectional view in Figure 1. 4 is a plan view of the entire surface grinder, FIG. 4 is a front view of the entire surface grinder, and FIG. 5 is a partial perspective view showing a modification of the surface grinder to which the present invention is applied. 1... Machine body, 5, 6... Rotating shaft, 7,
8... Grindstone, 12... Grindstone guard, 15... Carrier disc, 21... Support shaft, 22... Grindstone replacement arm, 22a... Arc-shaped recess, 27... Guide stepped portion.

Claims (1)

[Scope of utility model registration request] It is equipped with a pair of vertical rotating shafts, upper and lower, centered on the same axis, and a rotating grindstone is removably fixed to the rotating shaft flanges at opposite ends of both rotating shafts, and the workpiece is passed between the two grinding wheels while rotating. In a vertical double-headed surface grinding machine equipped with a carrier disk that supplies between grinding wheels,
A grindstone replacement arm on which a grindstone can be placed is rotatably arranged via a vertical support shaft, and the arm has a guide step that follows the outer circumference of the grindstone and an arcuate recess that follows the outer circumference of the rotating shaft flange. , and the arm is rotatable between an internal position where the arm is inserted under the lower grindstone and the centers of the arc-shaped recess and the guide step approximately coincide with the center of the rotation axis, and an external position outside the machine. A vertical double-head surface grinder characterized by the following.