JPH09314446A - Workpiece drive unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a workpiece drive unit capable of correctly finishing a workpiece having a part to be ground on each end side in the axial direction at high speed. SOLUTION: An outer circumferential part of a grinding wheel is branched. The braking force against the grinding force is given to a workpiece W by the friction of the outer circumference of a drum 4 whose axis is parallel to that of a grinding wheel, 1 an open belt 10 is provided in the opposite space, and the braking force against the grinding force is given to the workpiece by the belt 10 with the traveling position of the belt 10 to be constant by a workpiece holder 11 in a similar manner to the drum. The workpiece is fed by a carrier 2 concentric with the drum.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work piece driving device.

[0002]

SUMMARY OF THE INVENTION The present invention is an improvement over the prior art described below.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a work piece driving device provided with an automatic feeding device suitable for automatically and accurately machining both axial sides of a cylindrical work piece at a high speed.

[0004]

A first aspect of the present invention is to provide a grindstone having cylindrical outer peripheral portions spaced apart from each other with facing surface intervals shorter than the length of a workpiece in the axial direction, and an axial direction of the grindstone. A drum having a width of an outer peripheral surface facing a space portion spaced apart from the drum shorter than the length of the workpiece, and a drum rotatably supported coaxially with the drum and disposed on the outer peripheral side of the drum, and the workpiece on the outer periphery. A work piece driving device having a carrier having a receiver, a driving device for the drum, and a driving device for the carrier.

A second aspect of the present invention is to drum a work piece at a grinding position on an outer peripheral surface of a belt wound between two pulleys of a parallel belt device provided with the axis of the grindstone parallel to the rotation axis direction. And the work drive device according to the first invention, characterized in that the work drive device is wound so as to be sandwiched by the belt.

A third aspect of the present invention is the workpiece drive device according to the second aspect, further comprising a workpiece retainer for holding the position of the workpiece at the grinding position via the belt. .

A fourth invention of the present invention is the workpiece driving apparatus according to any one of the first to third inventions, characterized in that the workpiece driving means covers the carrier along the outer periphery of the carrier. is there.

A fifth invention of the present invention is the workpiece driving apparatus according to the fourth invention, wherein the workpiece guiding means is opened at a workpiece loading position and a grinding position.

A sixth invention of the present invention is the workpiece driving apparatus according to the fourth invention, wherein the workpiece guiding means is provided from the vicinity of the grinding position to the workpiece discharging position.

According to a seventh aspect of the present invention, the workpiece guiding means is provided with a workpiece loading port corresponding to the upper position of the carrier, is opened around the grinding position, and handles the workpiece corresponding to the lower position of the carrier. The work piece drive device according to the fourth invention is characterized in that the work piece drive device is opened for discharging.

An eighth invention of the present invention is the workpiece drive apparatus according to the first invention, wherein the drum is an adjusting wheel.

A ninth aspect of the present invention is characterized in that it has a workpiece guide means for covering the carrier along the outer periphery of the carrier, and the workpiece guide means is continuous in the workpiece feed direction before and after the grinding position. The work piece drive device according to the eighth invention.

A tenth aspect of the present invention is the workpiece drive device according to the fourth aspect, characterized in that the workpiece guide means and the belt of the belt device are provided so as to partially overlap each other.

[0014]

2. Description of the Related Art A shearing process using a press is performed to process a long round bar into a short cylindrical product. According to such processing, both ends are elliptical, so that chamfering is conventionally performed manually or by turning.

[0015]

[Embodiment 1]

(Overall Structure) FIG. 1 is a front view of a main part of a workpiece driving device as viewed from the axial direction, and FIG. 2 is an enlarged sectional view taken along line AA of FIG.

As shown in FIG. 2, a grindstone having a cylindrical outer peripheral portion 1a spaced apart from each other with a facing distance between the side surfaces of the grindstone shorter than the cylindrical workpiece W in the axial direction (vertical direction in FIG. 2). Reference numeral 1 is rotatably supported by a grindstone base 2 and is rotationally driven by a driving device (not shown). In the above, the outer peripheral portion 1a of the grindstone 1 is formed by fixing two cylindrical grindstones to the grindstone shaft at intervals. Alternatively, it is formed by molding the outer periphery of two grindstones. As shown in FIG. 2, this grindstone 1 is formed into a chamfered CG shape at the corners of the side surface and the outer periphery on the opposite surface side so that the workpiece W can be chamfered.

The drum 4 is supported by a facing space 3 formed by the outer peripheral portions 1a, 1a of the grindstone 1 such that the drum 4 is supported so as to oppose the outer circumference of the grindstone 1 so as to be rotationally driven by an axis parallel to the axis of the grindstone 1. It is provided to be movable in the direction of.

A carrier 5 is rotatably supported on the drum 4 coaxially with the drum 4. Workpiece receiving grooves 6 for holding the workpiece W are provided by equally arranging the outer periphery of the carrier 5.

A belt 10 wound around two pulleys 8 and 9 of a belt device 7 provided parallel to the axis of the grindstone 1 and the axis of rotation is wound around a workpiece W. This belt device 7
As shown in FIG. 2, the belt 10 has an outer peripheral portion 1 of the grindstone 1.
It is provided so as to be disposed in the facing space 3 between a.

Workpiece retainer 1 for holding the position of the workpiece W at the grinding position GP via the belt 10 of the belt device 7.
1 is disposed in the facing space 3 of the grindstone 1.

(Drum and Carrier) FIG. 3 shows a drum shaft 25.
FIG. 4 is a side view showing a drum 4 and a carrier 5 each including FIG. 4, and FIG. A slide 15 that slides on a dovetail-shaped guide 14a of a slide base 14 fixed to a machine base 13 (the grindstone base 2 is not shown) supported on the grindstone base 2 is connected to a servomotor 16 and is connected to the servomotor 16. By means of a screw feeder (not shown) provided between the slides 15, the sheet is fed in a direction perpendicular to the paper surface of FIGS. 3 and 4.

A horizontal guide 15a perpendicular to the moving direction of the slide 15 is provided on the slide 15, and a cross slide 17 whose position can be adjusted in the left and right directions in FIGS. 3 and 4 is fitted to the guide 15a. And screw feed device 1
The position of the cross slide 17 is determined by 7a. In this screw feed device 17a, a feed screw 17b rotatably supported by a bearing bracket 17d fixed to the slide 15 so as not to move in the axial direction is screwed into a nut 17c fixed to the cross slide 17. A dovetail-shaped guide 18a in the same direction as the guide 14a on the slide base 14 is formed on the upper slide base 18 fixed on the cross slide 17, and the drum base body 19 is movably fitted to this guide 18a. The position is adjustable.

The driving device for moving the drum base body 19 is a screw feeding device (not shown) connected to the output shaft 22 fixed to the worm wheel 21b of the worm reducer 21 as shown in FIG. Warm 2
A handwheel 24 is fixed to the input shaft 23 to which 1a is fixed. When the handwheel 24 is rotated, the input shaft 23 is rotated, the worm 21a is rotated, and the output shaft 22 is also rotated by the rotation transmitted to the worm wheel 21b, and the drum base body 19 is rotated through a screw feeder (not shown).
The position of is adjusted.

As shown in FIG. 3, a horizontal drum shaft 25 orthogonal to the guide 14a of the slide base 14 is supported by the drum base body 19 via a bearing 26 so as to be rotatable and not to move in the axial direction. There is. The iron drum 4 is fitted to the taper shaft portion 25a at the tip of the drum shaft 25, and a bolt 28 for inserting the metal plate 27 that abuts against the edge of the center hole of the drum 4 is screwed into the drum shaft 25 so that the drum 4 moves. Axis 2
It is fixed at 5. The rear end of the drum shaft 4 is connected to an output portion of a drive device 29 fixed to the drum base body 19.

The width of the outer peripheral portion 4a of the drum 4 is shorter than the length of the workpiece W. Then, the outer peripheral portion 4a is reduced in diameter on both sides and divided into two steps on both sides, and a step portion 4b, a bearing fitting portion 4c of a step portion having a diameter smaller than the step portion 4b, and a shaft sealing member having a diameter smaller than the bearing fitting portion 4c. A mounting step portion 4d is provided.

The bearing 30 fitted in the above-mentioned bearing fitting portion 4c
The carrier 5 is rotatably supported by the drum 4 via the. The carrier 5 forms a workpiece receiving groove 6 which is a groove in this example as a workpiece receiving member, and when assembled with the drum 4, the bearings 30 are fitted to the above-mentioned bearings 30 to form a gap on both sides of the drum outer peripheral portion 4a. A ring-shaped and plate-shaped side plate 5b abutted and fixed to the outer side in the axial direction of each of the carrier wheels 5a and the carrier wheels 5a arranged at a distance, and a segment piece 5d sandwiched between the side plates 5b and fixed by bolts 5c. Have.

In this embodiment, the segment pieces 5d have an arc shape close to a quadrant of the circumference of the carrier 5 and are arranged along the drum 4 with a slight gap from the outer circumference of the drum 4. The end portions in the circumferential direction are separated from each other, and the workpiece receiving groove 6 is provided between the end portions. This carrier 5
With respect to the circumferential direction of the workpiece, the width of the workpiece receiving groove 6 is a size in which the workpiece W is loosely fitted. As shown in FIG. 2, a stopper 5g that abuts the end surface of the workpiece W at the position of the workpiece receiving groove 6 and restricts the position of the workpiece W is screwed into the side plate 5b.
As a result, the workpiece W is restricted to a position where chamfering of the workpiece W is equal at both ends.

The bearing 30 on one side is fitted to the lid 5f fixed to the carrier wheel 5a and the lid 5f with a small gap, and the shaft sealing member mounting step 4d on the same side as the bearing 30 of the drum 4 is provided.
The shaft is sealed by a seal member 4f fitted and fixed to the shaft. The other bearing 30 on one side is fitted with an annular large gear 31 fixed to the carrier wheel 5a and a small gap on the inner circumference of this large gear 31, and the shaft seal on the same side as the bearing 30 of the drum 4 is sealed. The shaft is sealed by a seal member 4g fitted and fixed to the member mounting step portion 4d and a circumferential groove provided on the inner circumference of the large gear 31.

(Drive Device for Carrier) A large gear 31 coaxial with the drum shaft 25 is fixed to the carrier wheel 5a of the carrier 5. The small gear 32 that meshes with the large gear 31 is
It is fixed to the gear shaft 33. The gear shaft 33 is rotatably supported by a bearing base 34 fixed to the drum base body 19 via a bearing 35, and its rear end is connected to an output shaft 37 a of a servomotor 37 via a shaft joint 36. The servomotor 37 is fixed to a bracket 38 that covers the shaft joint 36 described above. The bracket 38 is fixed to the bearing base 34.

The above-mentioned servo motor 37 is controlled so that the carrier 5 can be indexed and rotated. In this example, the carrier 5 is indexed every quarter rotation. Then, during indexing, rapid feed is performed from the workpiece loading position to near the grinding position GP, followed by a feed speed suitable for rough grinding, and finally finish grinding feed. Then, when the workpiece W at the highest position in FIG. 1 is sent to the grinding position GP by the rotation of the carrier 5, the moving direction around the carrier 5 of the workpiece receiving groove 6 in which the workpiece W is loaded. Regarding the workpiece W on the downstream side, the empty workpiece receiving groove 6 is rotated to the workpiece loading port 41, whereas the unprocessed workpiece W is supplied by the magazine feeder (not shown). .

(Belt device) The pulley 8 of the belt device 7,
As shown in FIG. 1, reference numeral 9 indicates the grindstone 1 in the vertical direction of the grinding position GP.
And outside the carrier 5. As shown in FIG. 2, the belt 10 is arranged in the facing space 3 of the grindstone 1. The upper and lower pulleys 8 and 9 are rotatably supported by columns 60 provided on the upper light base 18, as shown in FIG.

That is, the pulley 8 is fixed to a pulley drive shaft 44 which is rotatably supported by a bearing bracket 42 fixed to a support 60 via a bearing 43, and the shaft 44 is connected to the shaft coupling 4
It is connected to the motor 46 via 5. The motor 46 is fixed to the column 60 via an intermediate casing 47.

The pulley 9 is rotatably supported via a bearing 61 on a fixed shaft 49 fixed to a bracket 48 which is fixed to a column 60 so that its vertical position can be adjusted. The belt 10 wound around the pulleys 8 and 9 is one V belt in this example. As shown in FIG. 8, the belt device 7 has a vertical line L orthogonal to the horizontal center line of the workpiece W.
2 is inclined by a slight angle θ with respect to the traveling direction 10a of the belt 10 so as to come into contact with the workpiece W in an oblique manner. At the position of the groove 6, a force applied to the adjusting screw 5g screwed into the side plate 5b at the time of grinding is generated. As shown in FIG. 5, this oblique adjustment is performed by adjusting the oblique adjustment spacer 6 between the upper slide base 21g and the lower surface of the column 60.
It is done by sandwiching 2.

The work presser 11 is located on the back of the belt 10 and regulates the position of the work W at the grinding position GP. As shown in FIG. 5, the work presser 11 is arranged over the two stands 51 fixed to the columns 60 respectively. The workpiece pressing body 63 is fixed to the beam 52 fitted and fixed to the stand 51. As shown in FIGS. 2 and 9, a presser plate 53, which rubs against the back surface of the belt 10 in a fitted state, is slidably fitted to the workpiece pressing body 63 in a direction in which the workpiece W advances and retracts. Has been done. It is fixed to the work clamp body 63. As shown in FIG. 5 in FIG. 2, the workpiece pressing body 63 has a long hole 53a formed in the pressing plate 53 into which a guide pin 64 fixed to the workpiece pressing body 63 is inserted. Thus, the pressing plate 53 is always biased and attached in the direction in which the workpiece W is pressed through the belt 10.

(Workpiece feed guide means) As shown in FIGS. 1 and 3, a guide cover 54 is arranged along the outer periphery of the carrier 5 with a slight gap from the outer periphery of the carrier 5. The guide cover 54 is divided into an inlet side guide cover 54A and an outlet side guide cover 54B. As shown in FIG. 1, the inlet side guide cover 54A has a workpiece loading port 41 at the top of the carrier 5 so that the workpiece W supplied from a magazine feeder (not shown) can pass to the workpiece receiving groove 6 of the carrier 5. Further, the end portion on the grinding position GP side is extended to a position beyond the belt 10 so that a part thereof overlaps the belt 10 in the width direction. The end 54b is bifurcated at the portion where the belt 10 exists so as not to interfere with the belt 10.

The outlet side guide cover 54B is at the grinding position GP.
1 has a starting end 54c which starts from the bottom, and the end reaches the discharge position 56 at the lowest position of the carrier 5. The starting end 54c is bifurcated and divided into both sides of the belt 10.

The guide cover 54 described above does not need to allow the workpiece W to escape from the workpiece receiving groove 6 of the carrier 5, so the width can be selected within that range, but a size that can cover the length of the workpiece W is desirable. . In this example, the guide cover 54 is fixed to a cover 55 that entirely covers the drum 4, the carrier 5, and the like.

The carrier 5 and the guide cover 54
The workpiece loading port may be provided on the lower side of the carrier 5 or on the side opposite to the grinding position GP in the horizontal direction, and the position of the workpiece discharging portion may be the upper portion of the carrier 5 or the back portion of the carrier 5.

(Operation) The operation of the above configuration will be described.

In the state where the workpiece drive device is stopped without the workpiece W, the upper light base 18 and the grindstone base 2 are at predetermined positions.

At the indexing position of the carrier 5 in this state, the workpiece receiving groove 6 is located vertically and horizontally.

When the workpiece driving device is driven, the driving device 29 rotates the drum shaft 25 and continuously rotates the drum 4 in the clockwise direction shown by the arrow in FIG. In addition, the motor 46 of the belt device 7 rotates as the drum 4 rotates, and the shaft coupling 4
The pulley drive shaft 44 rotates via the pulley 5, and the pulley 8 drives the belt 10. The belt 10 is in a loosely stretched state. In the running direction of the belt 10, the side of the belt 10 with respect to the outer circumference of the drum 4 is opposite to the moving direction of the circumferential surface of the drum 4 (arrow in FIG. 1).

When the switch for starting the supply of the workpiece is pressed here, the unprocessed workpiece W is sent from the magazine feeder (not shown) to the workpiece loading port 41 at the workpiece supply position, and the workpiece on the upper part of the carrier 5 is sent. It is dropped into the receiving groove 6. When the loading of the workpiece W into the workpiece receiving groove 6 of the carrier 5 is detected by a detection means (not shown), the servo motor 3
7 is driven and its output shaft 37a rotates, this rotation is transmitted to the gear shaft 33 through the shaft coupling 36, the gear shaft 33 rotates together with the small gear 32, and the rotation of the small gear 32 is reduced to the large gear. The gear 31 is transmitted to the gear 31, and the large gear 31 and the carrier 5 rotate. Here, the servo motor 37 sends the carrier 5 counterclockwise at a rapid speed in FIG. 1 by a control device (not shown). At this time, centrifugal force acts on the workpiece W to try to escape from the workpiece W from the workpiece receiving groove 6, but since the guide cover 54 is provided, the carrier 5 can be rotated at a high speed. Then, before the position where the guide cover 54 is finished, the workpiece W moves from the guide cover 54 to the belt 1 as the workpiece W advances.
0, and is pushed into the bottom of the workpiece receiving groove 6 by the belt 10. As a result, the belt 10 is stretched by the workpiece W. Then, the workpiece W is brought into contact with the workpiece W and brakes the workpiece W while being rotated by the grinding force of the grindstone 1 together with the drum 4. At this time, the belt 10 obliquely crosses the workpiece W and the workpiece W is adjusted by the adjusting screw 5 g. Move toward and adjust screw 5g
The workpiece W is brought into contact with.

When the workpiece W approaches the grinding position GP, the servo motor 37 causes the carrier 5 to move by the controller (not shown).
The peripheral speed of is reduced to the peripheral speed corresponding to the feed speed of rough grinding.
When the workpiece W comes into contact with the outer circumferences of the grindstone 1 and the drum 4, rough grinding starts, and the shaft of the grindstone 1 and the drum shaft 25 are viewed from the front of the apparatus.
When the grinding action position of the grindstone 1 and the workpiece W goes down slightly above the straight line connecting the two axes, the rough grinding ends. Then, after the rough grinding is finished, the servo motor 37 similarly reduces the peripheral speed of the carrier 5 so as to obtain the feed speed of the workpiece W corresponding to the finish grinding, feeds the workpiece W, and finish-grinds.
Then, finish grinding is performed until the center of the workpiece W passes through a line connecting the center of the axis of the grindstone 1 and the center of the drum shaft 25, and the finish grinding is completed.

During the grinding operation, the outer periphery of the drum 4 rubs the outer periphery of the workpiece W to give a rotational force to the workpiece W.
Normally, only with this rotational force, the grindstone 1 and the workpiece W by the grindstone 1
Although sufficient braking is not applied against the force that attempts to rotate the workpiece W by the main grinding force that is the force in the tangential direction of the grindstone 1 at the grinding action point between the belt 10 and the drum 4, Since the rotating force is applied to the workpiece W in the same direction as the rotating force applied to the workpiece W, the workpiece W is given a braking force necessary to resist the grinding force and is rotated by the grindstone 1 at a stable speed. To be In addition, the workpiece pressing plate 53 described above.
Since the back portion of the belt 10 is pushed in at the grinding position GP in a fitted state, the belt 10 passes a certain position, and the force for driving the workpiece W by the belt 10 is stabilized.

During the above-mentioned rough grinding and finish grinding, a new unprocessed workpiece W is fed from the workpiece loading port 41 by the magazine feeder to the workpiece loading port 41 by the rotation of the carrier 5 by about 90 degrees. The object receiving groove 6 is loaded.

When the finish grinding is completed in this way, a control device (not shown) rapidly rotates the servo motor 37 to feed the carrier 5 in the same direction as before. Similarly, before the new workpiece W comes into contact with both the grindstone 1 and the drum 4, the carrier 5 is decelerated to the feed speed in the rough grinding.
On the other hand, the workpiece W that has been ground is the workpiece receiving groove 6 of the carrier 5.
And the belt 10 holds the outlet side guide cover 54.
The workpiece W enters the cover 54B from the starting end 54c of B.
Is trying to escape from the workpiece receiving groove 6 by the centrifugal force applied to the workpiece W by the carrier 5 and the gravity on the workpiece W, but is held by the outlet side guide cover 54B. The newly-supplied workpiece W approaches the grindstone 1, the rotation of the carrier 5 is decelerated by the rough grinding feed, and the ground workpiece W has come near the lowest position of the drum 1 by the time finish grinding is completed. It is discharged from the discharge portion 56 by gravity.

(Second Embodiment) In the second embodiment, neither the belt device 7 nor the workpiece retainer 11 is used. FIG. 6 is a front view showing the second embodiment. FIG. 7 is an enlarged sectional view taken along line DD of FIG.

The guide cover 54 passes through the facing space 3 between the cylindrical outer peripheral portions 1a of the two grindstones 1 and is continuous as shown in the figure. At this grinding position GP, the guide cover 54 and the workpiece W are particularly close to each other to form a small gap. The drum 4 is an adjusting wheel, and a braking force is applied to the workpiece W against the grinding force of the grindstone 1 applied to the workpiece W only by the drum 4, and the grinding force applied to the workpiece W by the grindstone 1 is used. The workpiece W rotates at a stable speed.

For the drum 4 used as the adjusting wheel, a grindstone of a rubber binder or a grindstone of resinoid bond is used as in the adjusting wheel of a normal coreless grinding machine.

In the case of chamfering both ends of a cylindrical object such as the workpiece W of this example, the adjusting wheel has little wear and has sufficient durability.

(Other Embodiments) For example, the drum shaft 25 is made to protrude to the right in FIG. 3 from the drum 4, and the carrier 5 is rotatably supported by the protruding portion of the drum shaft 25. The outer peripheral portion of the carrier 5 is similar to that of the first embodiment.
The drive device for the carrier 5 is similar to that of the first embodiment, or
For example, a drive device for the output shaft coaxial with the drum shaft 25 is provided (neither is shown).

[0053]

[Embodiments] These are described together with the embodiments.

Needless to say, the shape to be machined at both ends of the workpiece W is not limited to chamfering, and it is possible to grind both ends when both ends are reduced in diameter from the central portion.

[0055]

According to the first aspect of the present invention, there is provided a grindstone having cylindrical outer peripheral portions spaced apart from each other at an opposed surface distance shorter than the length of a workpiece in the axial direction, and an axial distance between the grindstones. A drum whose outer peripheral width is provided to face the open space portion is shorter than the length of the workpiece, and a carrier which is rotatably supported coaxially with the drum and is disposed on the outer peripheral side of the drum and has a workpiece receiver on the outer periphery. By using the work piece driving device having the drum driving device and the carrier driving device, the work piece is automatically fed when performing centerless grinding on both axial sides of the cylindrical work piece. , Can be discharged.

According to a second aspect of the present invention, in the first aspect of the present invention, the outer peripheral surface of the belt wound around two pulleys of a parallel belt device provided with the axis of the grindstone parallel to the axis of rotation is ground. By winding the workpiece on the workpiece at the position so as to be sandwiched between the drum and the belt, the workpiece can be reliably braked.

In a third aspect of the present invention, in the second aspect, a work piece retainer for holding the position of the work piece at the grinding position via the belt is provided, thereby stabilizing the work piece braking force of the belt. Contribute to that.

In a fourth aspect of the present invention, in any one of the first to third aspects of the invention, by providing a workpiece guide means for covering the carrier along the outer periphery of the carrier, the carrier is rotationally indexed at a high speed. be able to.

In a fifth aspect of the present invention, in the fourth aspect, the workpiece guiding means can open the workpiece loading position and the grinding position so that the workpiece can be loaded from the workpiece loading position.

According to a sixth aspect of the present invention, in the fourth aspect, the workpiece guide means is provided from the vicinity of the grinding position to the workpiece discharge position, so that the processed workpiece is at an appropriate position for discharge. Can lead up to.

In a seventh aspect of the present invention, in the fourth aspect, the workpiece guide means is provided with a workpiece loading port corresponding to the upper position of the carrier, and is opened around the grinding position and at the lower position of the carrier. Correspondingly open for discharging the workpiece, the workpiece can be loaded from the upper loading position and can be guided to the discharging position after grinding and discharged.

According to an eighth aspect of the present invention, in the first aspect of the present invention, the drum is an adjusting wheel, and the work piece drive device according to the first aspect is used. Since the necessary braking force is applied to the object, the structure is simple.

In a ninth aspect of the present invention, in the eighth aspect, there is provided a workpiece guide means for covering the carrier along the outer periphery of the carrier, and the workpiece guide means is continuous before and after the grinding position in the workpiece feed direction. Thus, in the grinding position, the workpiece is held by the carrier even when the grinding wheel head or the carrier is retracted and the carrier and the grinding wheel are separated from each other. Therefore, even if the grinding wheel head or the carrier retracts when the machine is stopped in an emergency, the work piece cannot be removed from the machine.

According to a tenth aspect of the present invention, in the fourth aspect, the workpiece guide means and the belt of the belt device are provided so as to partially overlap each other, so that the workpiece guide means performs processing on the belt device side. The work piece stabilizes during the transfer of the work piece.

[Brief description of drawings]

 Each of the drawings shows an embodiment of the present invention,

FIG. 1 is a front view including a partial cross section of a first embodiment.

FIG. 2 is an enlarged sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

4 is a side view of the opposite side of FIG. 3 including a partial cross section parallel to FIG.

FIG. 5 is an enlarged sectional view taken along the line CC of FIG. 1;

FIG. 6 is a front view of the second embodiment.

7 is an enlarged cross-sectional view taken along line DD of FIG.

FIG. 8 is a front view of the belt device as seen from the outer peripheral side of the belt.

FIG. 9 is a side view of a belt retainer.

[Explanation of symbols]

C ... Chamfering GP ... Grinding position W ... Workpiece θ ... Belt inclination angle 1 ... Grinding stone 1a ... Cylindrical outer peripheral portion 2 ... Grinding stone base 3 ... Opposing space 4 ... Drum 4a ... Outer peripheral portion 4b ... Step portion 4c ... Bearing fitting 4d ... Shaft sealing member mounting step 4e ... Boss 4f ... Sealing member 4g ... Sealing member 5 ... Carrier 5a ... Carrier wheel 5b ... Side plate 5c ...
Bolt 5d ... Segment piece 5e ... Stopper 5
f ... Lid 5g ... Adjusting screw 6 ... Workpiece receiving groove 7 ... Belt device 8 ... Pulley 9 ... Pulley 10 ... Belt 10a ... Belt running direction 11 ... Workpiece retainer 13 ... Machine base 14 ... Slide base 14a ... Guide 15 ... Slide 15a ... Guide 16 ... Servomotor 17 ... Cross slide 17a ... Screw feed device 17b
... Feed screw 17c ... Nut 17d ... Bearing bracket 18 ... Upper slide base 18a ... Guide 19 ... Drum base body 21 ... Worm reducer 21a ... Worm 21b ... Worm wheel 22 ... Output shaft 23 ... Input shaft 24 ... Handwheel 25 ... Drum Shaft 25a ... Tapered shaft portion 26 ... Bearing 27 ... Abutment 28 ... Bolt 29 ... Drive device 30 ... Bearing 31 ... Large gear 32 ... Small gear 33 ... Gear shaft 34 ... Bearing base 35 ... Bearing 36 ... Shaft joint 37 ... Servo motor 37a ... Output shaft 38 ... Bracket 41 ... Workpiece loading port 42 ... Bearing bracket 43 ... Bearing 44 ... Pulley drive shaft 45 ... Shaft coupling 46 ... Motor 47 ... Intermediate casing 48 ... Bracket 49 ... Fixed shaft 51 ... Sudund 52 ... Beam 53 ... Workpiece retainer plate 53a ... Oblong hole 54 ... Guide cover 54A ... Enter Side guide cover 5
4B ... Outlet side guide cover 54b ... End 54c ... Start end 55 ... Cover 56 ... Discharge part 60 ... Strut 61 ... Bearing 62 ... Oblique adjustment spacer 63 ... Workpiece retainer main body 64 ... Guide pin 65 ... Spring

Claims (10)

[Claims] 1. A grindstone provided with cylindrical outer peripheral portions spaced apart from each other at an opposing surface distance shorter than the length of a workpiece in the axial direction, and a grindstone facing the axially spaced space portion of the grindstone. A drum having an outer peripheral surface whose width is shorter than the length of the workpiece, a carrier rotatably supported coaxially with the drum and disposed on the outer peripheral side of the drum and having a workpiece receiver on the outer periphery, and a drive device for the drum. , A drive for the carrier, and a workpiece drive. 2. The outer peripheral surface of a belt wound between two pulleys of a parallel belt device provided in parallel with the axis of the grindstone and the rotational axis direction, holds the workpiece at the grinding position between the drum and the belt. The work piece drive device according to claim 1, wherein the work piece drive device is wound around the work piece drive device. 3. The work piece drive device according to claim 2, further comprising a work piece retainer for holding a position of the work piece at a grinding position via the belt. 4. A workpiece guide means for covering the carrier along the outer circumference of the carrier.
The work piece drive device described in any one of 1. 5. The workpiece guide means is a workpiece loading position,
The workpiece drive device according to claim 4, wherein a grinding position is opened. 6. The workpiece drive device according to claim 4, wherein the workpiece guide means is provided from the vicinity of the grinding position to the workpiece discharge position. 7. The workpiece guide means is provided with a workpiece loading port corresponding to the upper position of the carrier, is opened around the grinding position, and is opened to discharge the workpiece corresponding to the lower position of the carrier. The workpiece drive device according to claim 4, wherein the workpiece drive device is provided. 8. The work piece drive apparatus according to claim 1, wherein the drum is an adjusting wheel. 9. A work guide means for covering the carrier along the outer periphery of the carrier, wherein the work guide means is continuous before and after the grinding position in the work feed direction. Workpiece drive device. 10. The workpiece drive device according to claim 4, wherein the workpiece guide means and the belt of the belt device are provided so as to partially overlap with each other.