JPH0871906A - Copying belt sander - Google Patents

Abstract

PURPOSE: To provide a copying belt sander by which the processing of grinding/ polishing of workpieces having various curvature can be executed. CONSTITUTION: Pressure rolls 25a, 25b, 29 engergized on a material feeding passage side by a bounding machine are arranged in front of and in rear of a polishing head on one side of the material feeding passage, and also a pair of feeding/driving rolls 30a, 30b which are brought in contact with the other side surface of a workpiece w so as to be fed/driven, are arranged on the other side of the material feeding passage, further a guide mechanism by which the driving shafts of the pair of feeding/driving rolls 30a, 30b are guided in parting/ approaching directions, is provided to a copying belt sander so that the movement of the pair of feeding/driving rolls 30a, 30b can be adjusted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copying belt sander capable of polishing curved materials having various curvatures.

[0002]

2. Description of the Related Art A polishing head is arranged on one side of a material feeding passage, and a pressing roll urged toward the material feeding passage by an ammunition is arranged on one side of the polishing head in the front-rear position of the polishing head. Proposed a configuration in which a pair of feed drive rolls for feeding and driving the processed material are disposed on the other side so as to drive the processed material to run the processed material and to grind and polish the side surface of the processed material. Can be done.

In such a structure, the processed material is run by being clamped by the pressing roll and the feed drive roll on both the left and right sides of the processed material, so that the processed material is run by the belt feeding device. Unlike the above, there is an advantage that a curved processed material can be applied.

[0004]

By the way, as described above, in the construction capable of polishing a curved work material, the work material which can be processed by the distance between the feed drive rolls supporting the work material. Has a fixed curvature, and it is impossible to grind or polish a workpiece having a curvature smaller than that. Therefore, in order to make it possible to process a workpiece having a wide curvature with such a configuration, it is conceivable to dispose the feed drive rolls in advance (see FIG. 2). However, there is a problem in that the supporting points are too close to each other and a workpiece having a large curvature cannot be stably run.

It is an object of the present invention to provide a copying belt sander capable of grinding and polishing workpieces having various curvatures.

[0006]

SUMMARY OF THE INVENTION According to the present invention, an endless polishing belt is hung on a belt driving mechanism composed of a plurality of rolls equipped with a drive motor driven and controlled by a sanding motor, and the endless polishing belt is pressed against a work material. A treading body to be arranged is provided on one side of the material feeding passage with a polishing head provided inside the endless polishing belt, and on one side of the material feeding passage, at a front and rear position of the treading body of the polishing head, A pressing roll that is urged to the material feeding passage side by an ammunition machine is arranged, and a pair of feed drive rolls that come into contact with the other side surface of the processed material to drive the processed material are arranged on the other side, and The copying belt sander is characterized in that a guide mechanism for guiding the drive shaft of the feed drive roll pair in a separation direction is provided to allow movement adjustment of the feed drive roll pair.

[0007]

The function of adjusting the distance between the feed drive roll pairs is adjusted by the guide mechanism so as to match the curvature of the processed material. This allows
The feed drive roll can be pressed against the curved surface of the processed material.

When the processed material is supplied to the material feeding passage,
The pressing roll is brought into pressure contact with one side surface by the urging force of the pressing roll, and the feed drive roll pair is brought into pressure contact with the other side surface, whereby the feed drive force is applied by the feed drive roll. Then, the polishing belt travels while being pressed against the processed material by the pressure roller such as the contact roll of the polishing head and the pressure pad, and is ground and polished in accordance with the curve.

[0009]

【Example】

3 to 6 show a copying belt sander to which the present invention is applied, and this copying belt sander is a processed material w.
It is possible to selectively grind and polish both surfaces and only one surface, and when performing the one-side grinding, the curved processing material w
It becomes possible to grind and polish.

The copying belt sander having such a structure will be described. As shown in FIG. 3, polishing heads 3a and 3b are arranged on the left and right sides of the base frame 1 and covered with covers 50 and 50. The material feeding passage 2 is formed between 3a and 3b.

The polishing heads 3a and 3b are mounted on the left and right plates 51 and 52. The right plate 51 has a guide metal 54 fitted in a guide 53 formed in the left-right direction on the base frame 1 so as to be movable in the left-right direction along the base frame 1 along the guide 53. The width of the material feeding passage 2 can be set by the movement of the plate 51. Further, before and after the material feeding passage 2, material feeding tables 55, 55 for supporting the processed material w are arranged in the front and rear.

The structure of the polishing heads 3a and 3b is shown in FIG.
6 will be described.

Each of the polishing heads 3a and 3b comprises a belt drive mechanism composed of a plurality of roll groups, and an endless polishing belt 4 hung on the belt drive mechanism. The roll groups are supported so as to be close to the material feeding passage 2. Contact roll 5 that doubles as a treadle
And a feed drive roll 6 that is driven and controlled by a sanding motor M, and a tension roll 7 that comes into contact with the inner surface of the endless polishing belt 4 and urges the endless polishing belt 4 outward to bring it into a tensioned state. .

As shown in FIG. 4, the contact rolls 5 and 5 of the polishing heads 3a and 3b are arranged to face each other on both sides of the material feeding passage 2, and the processed material w is lined by the contact rolls 5 and 5 from both sides. It is designed so that it can be held in contact.

To explain this structure in more detail, as shown in FIG. 8, one end of a swinging link 9 is rotatably supported by a support shaft 8 which is supported below the plate 51 in the vertical direction, and the swinging link 9 is swingably supported. The contact roll 5 is rotatably supported at the other end of the moving link 9, and thereby the contact roll 5 is supported so as to be movable in the approaching direction to the material feeding passage 2. Further, as shown in FIG. 7, the tip end of the cylinder rod 11 of the advancing / retreating cylinder 10 composed of an air cylinder whose rear end is pivotally supported is pivotally supported on the swing link 9.

Then, by the forward / backward drive of the forward / backward cylinder 10, the swing link 9 is tilted about the swing shaft 8, and the contact roll 5 is applied with a stepping pressure to the retracted position of the solid line in FIG. 1 and the energized position of the chain line in FIG.

The tension roll 7 is pivotally supported by the support shaft 14 on the other end of the swing link 13 whose rear end is pivotally supported as shown in FIG.
It supports the tip of the cylinder rod 16. The urging cylinder 15 has a rear end supported by a shaft 17 so as to be tiltable, and when the cylinder rod 16 extends, the oscillating link 1
3 is tilted about the support shaft 18 at the rear end, the tension roll 7 is inscribed in the endless polishing belt 4, and the extension force makes the endless polishing belt 4 in a tensioned state.

Contact roll 5 of the polishing head 3a
Presser rolls 25a and 25b are arranged on the upstream side of the processed material w near the side of the material feeding passage 2. The press rolls 25a and 25b are supported in the front and rear by a bracket 24 which is rotatably supported by a shaft 23 on a swing arm 22 which is rotatably supported by a support shaft 21, and the spring 2
The urging action of 6 urges the material feeding passage 2 side.

The contact roll 5 of the polishing head 3a
On the downstream side of the processed material w, a pressing roll 29 urged toward the material feeding passage 2 by a spring 28 is also provided near the side of the material feeding passage 2.

On the other hand, drive rolls 30a and 30b driven by a drive traveling motor 33 are provided on both sides of the contact roll 5 of the polishing head 3b.

FIG. 11 shows the control means for the advancing / retreating cylinder 10 and the urging cylinder 15. The forward / backward cylinder 10,
The urging cylinder 15 is provided for each of the polishing heads 3a and 3b and is connected to the same pressure source P, but only one of the advancing / retreating cylinder 10 and the urging cylinder 15 is shown.
Omit the other.

A solenoid valve 60 is connected to the front chamber side and a solenoid valve 60 is connected to the rear chamber side via a regulator 61 to the air supply port communicating with the front chamber and the rear chamber of the piston of the advance / retreat cylinder 10. Then, the pressure from the air source P is connected to either the front chamber or the rear chamber. At the position shown in FIG. 4, the air source P communicates with the front chamber and the rear chamber communicates with the atmosphere by the control of the solenoid valve 60, and the contact roll 5 becomes the standby position. Further, when the solenoid valve 60 is conversion-controlled from this state, the air source P communicates with the rear chamber side, the contact roll 5 is converted to the urging position, and the position becomes the chain line position in FIG. This rear chamber has an air source P via the regulator 61.
When the cylinder rod 11 retreats, air is released by the copying action of the processed material w of the contact roll 5, and the contact roll 5 is always biased with a constant pressure.

On the other hand, the biasing cylinder 15 is also similarly
The solenoid valve 64 is connected to the front chamber side of the piston and the solenoid valve 64 is connected to the rear chamber side via a regulator 65, and the pressure from the air source P is connected to either the front chamber or the rear chamber. In the normal state, the urging cylinder 15 is in a state in which the air source P communicates with the rear chamber side, the tension roll 7 is positioned to urge the endless polishing belt 4 from the inside, and the endless polishing belt 4 is replaced. Then, the air source P is supplied to the front chamber side to retract the tension roll 7 and relieve the tension of the endless polishing belt 4.

The regulator 65 retracts the cylinder rod 16 when the contact roll 5 is extended and the endless polishing belt 4 is in a tensioned state.
The endless polishing belt 4 is made to have a natural tension. Then, the regulator 61 and the regulator 65
The urging pressure of the contact roll 5 and the urging pressure of the tension roll 7 set by are set so that the urging pressure of the contact roll 5 is high, and the contact roll 5 always applies a predetermined pressure to the workpiece w. And the tension roll 7 is made to follow.

Further, in front of the pair of presser rolls 25a and 25b, there is a detection switch SW consisting of a proximity switch.
Is provided.

Then, the processed material w supplied to the material feeding passage 2
When the tip of the work piece w is detected by the detection switch SW, the advance / retreat cylinder 10 is converted from the standby position to the urging position in synchronization with the arrival of the tip of the processed material w between the contact rolls 5. The contact roll 5 extends, and the contact roll 5 is pressed against both surfaces of the processed material w via the endless polishing belt 4.

The timing control will be described with reference to FIG. 11. The central control unit CPU has the detection switch S.
W, a rotary encoder k, a counter C that sequentially counts pulses from the rotary encoder k, and the solenoid valve 60 are connected. The rotary encoder k includes the feed drive rolls 30a, 30
A pulse is generated by detecting passage of a slit formed around a slit plate f fixed to a drive shaft of a drive traveling motor 33 that drives b.

The counter C is preset with the number of pulses corresponding to the amount of rotation of the drive shaft of the drive traveling motor 33 corresponding to the traveling distance from the detection switch SW to the contact roll 5.

Then, the counter C is sequentially counted and consumed by the traveling of the work material w accompanying the driving of the feed drive rolls 30a and 30b, and the set value is consumed in synchronization with the arrival of the tip of the work material w on the contact roll 5. The central controller CPU issues a conversion command for the solenoid valve 60, and as described above, the rear chamber is connected to the air source P, and the contact roll 5 extends toward the material feeding passage 2 as shown by the chain line in FIG. Put out. Then, the urging force is applied to both side surfaces of the processed material w via the endless polishing belt 4, and the side surface of the processed material w is polished by the endless polishing belt 4.

In this structure, the side surface of the processed material w is ground by the endless polishing belt 4 by the copying action of the contact roll 5 on the side surface of the processed material w. Alternatively, even if it is wavy, appropriate polishing will be performed along both sides thereof.

When the processed material w is supplied to the material feeding passage 2, the left side surface is supported by the pressing rolls 25a, 25b and 29, and the right side surface is provided with running force by the feed drive rolls 30a and 30b to proceed. Then, when the tip end is located between the contact rolls 5 and 5, the contact rolls 5 and 5 are converted from the standby position of FIG. 1 to the biasing position of FIG.
Both side surfaces of the roller are subjected to a stepping pressure in a linear contact state by the contact rolls 5 and 5, and the polishing belt 4 is brought into pressure contact therewith.

The above is the basic operation of this embodiment on the premise of polishing both side surfaces, but as described above, this copying belt sander is also capable of grinding curved workpieces. Copy polishing is performed only by the polishing head 3a.

Next, the essential parts of the present invention relating to the grinding of curved material will be described.

The feed drive rolls 30a and 30b are shown in FIG.
As shown by, the chains 36 and 36 are hooked on the sprockets 35a and 35b fixed to the drive shaft 34 of the drive traveling motor 33 and the sprocket 32a and 32b fixed to the lower end of the drive shaft 31 of the feed drive rolls 30a and 30b. The feed drive roll 30 is driven by the transfer and drive traveling motor 33.
The a and 30b are synchronously driven in the same direction.

The feed drive rolls 30a and 30b can be moved in the direction of separation by a guide mechanism. The structure of the guide mechanism will be described.

Both ends of the feed drive rolls 30a, 30b are rotatably held by a bracket 39 formed by connecting the upper and lower support plates 37, 37 shown in FIG. 9 with a connecting rod 38. The slider 40 fixed to the lower end of the connecting rod 38 is projected in the arc groove 53 formed in the plate 52.

Further, the links 43, 43 are supported along the lower surface of the plate 52 by a support shaft 42 arranged at a position vertically aligned with the drive shaft 34 of the drive traveling motor 33,
Further, the other end is fixed to the slider 40 with a screw 44. Here, the arc groove 53 is an arc centered on the support shaft 42, as shown in FIG. Positioning holes 45a and 45b are formed in the plate 52, and one of the positioning holes 4a is formed from the lower support plate 37.
By inserting a pin 46 into 5a and 45b, the bracket 39 that supports the feed drive rolls 30a and 30b is held at any two positions.

In this structure, the links 43, 43 are rotated about the support shaft 42. At this time, the bracket 39 rotates together with the links 43, 43, and the arc groove 5
The rotation is allowed by 3. Further, due to such integral rotation, the drive shaft 31 of the feed drive rolls 30a and 30b also rotates about the support shaft 42, and the support shaft 42 is vertically aligned with the drive shaft of the drive traveling motor 33. Therefore, even with this movement, the sprocket 32a,
32b and the chains 36, 36 suspended between the sprockets 35a, 35b are not loosened or excessively tensioned, and the position conversion of the feed drive rolls 30a, 30b is allowed. Then, one of the positioning holes 45
The feed drive rolls 30a and 30b are fixed at any two positions by inserting the pins 46 into the a and 45b.

If the pin 46 is fitted in the positioning hole formed of an arcuate hole centering on the support shaft 42, the feed drive rolls 30a, 30b can be moved and adjusted in a stepless manner. In this case, it is possible to easily hold the position by using the bolt structure that can fix the position of the pin 46.

With this structure, in order to grind and polish the curved work material w, as shown in FIG. 3, the polishing head 3 is used.
After the contact roll 5 of b is moved to the retracted position by the drive control of the advancing / retreating cylinder 10, the feed drive roll 30
The close positions of a and 30b are adjusted to two positions. That is,
When the curvature of the processed material w is large, as shown in FIGS. 1 and 3, the bracket 39 is held outside by using the positioning hole 45a, and the distance between the feed drive rolls 30a and 30b is widened. . Further, in order to grind and polish the processed material w having a small curvature, as shown in FIG. 2, the bracket 39 is held outside by using the positioning hole 45b, and the interval between the feed drive rolls 30a and 30b is widened. To do. Or
By applying the positioning hole formed of the arcuate hole described above, the interval between the feed drive rolls 30a and 30b is adjusted steplessly according to the curvature of the processed material w.

Then, in this way, the feed drive roll 30
After adjusting the interval between a and 30b, the workpiece w is supplied to the material feeding passage 2 as shown in FIG. 4, and due to the front end detection of the workpiece w by the detection switch SW, the timing control described above is performed. When the processed material w arrives at the contact roll 5 of the polishing head 3a, the contact roll 5 is in the urging position, and presses the processed material w to the rolls 25a, 25b, 29.
At the same time, it is pressed against the feed drive rolls 30a and 30b,
The processed material w is caused to travel along the curve, and the polishing belt 4 is pressed against the curved surface of the processed material w by the stepping pressure of the contact roll 5, and the surface is ground and polished.

Thus, it is possible to perform a wide range of copy grinding and polishing from a small curvature to a large curvature while applying a running force to the processed material w at appropriate front and rear intervals by the feed drive rolls 30a and 30b.

In the above-mentioned configuration, the contact roll 5 is applied as the treading body, but a treading pad may be used as the treading body. Further, in this configuration, a curved belt sander capable of grinding and polishing both side surfaces by disposing grinding heads 3a and 3b on the left and right sides is used to grind and grind one curved surface using only the grinding head 3a. However, the present invention is also applicable to a single-sided polishing copying belt sander.

The guide mechanism guides the feed drive rolls 30a and 30b closer to each other by making them rotatable about the support shaft 42, but the feed drive rolls 30a and 30b are fed. It may be configured to be movable along the material passage 2 in the close-up direction. In this case, the distance between the drive shaft 31 of the feed drive rolls 30a and 30b and the drive shaft 34 of the drive traveling motor 33 changes, but by providing a tension mechanism to the chains 36 and 36, While absorbing the change, the driving force of the drive shaft 34 can be transmitted to the drive shaft 31 without causing looseness or tension in the chains 36, 36.

[0046]

According to the present invention, as described above, the material feeding passage 2
On one side, at the front and rear positions of the polishing head 3b, presser rolls 25a, 25b, which are urged toward the material feeding passage by a bullet,
29, and a pair of feed drive rolls 30a, 30b for feeding and driving the other side by contacting the other side surface of the processed material w.
And a guide mechanism for guiding the drive shaft 31 of the pair of feed drive rolls 30a and 30b in the close-up direction so that the feed drive roll pair can be moved and adjusted, which is suitable for the curvature of the workpiece w. Therefore, by adjusting the distance between the feed drive rolls, the feed drive rolls can be pressed against the curved surface of the workpiece w, which enables stable traveling of the workpiece w. However, there is an excellent effect that grinding and polishing with various curvatures are possible.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing a standby state of a copying belt sander of the present invention.

FIG. 2 is a conceptual diagram showing an operating state of the copying belt sander of the present invention.

FIG. 3 is a front view of a copying belt sander.

FIG. 4 is a plan view of the copying belt sander of the present invention.

FIG. 5 is a plan view of the copying belt sander with only the polishing head 3a being effective.

FIG. 6 is a plan view of the copying belt sander to which a bending material w is applied.

7 is a front view of the advancing / retreating cylinder 10. FIG.

FIG. 8 is a vertical cross-sectional side view showing a drive mechanism of a contact roll 5.

FIG. 9 Feed drive rolls Feed drive rolls 30a, 30b
It is a side view showing a drive mechanism of.

FIG. 10 is a plan view showing a main part of a plate 52.

FIG. 11 is a conceptual diagram showing a control means such as an advancing / retreating cylinder.

FIG. 12 is a vertical sectional side view showing a drive mechanism of a tension roll 7.

[Description of sign]

 2; material feeding passages 3a, 3b; polishing head 4; endless polishing belts 5, 5; contact rolls (stepping bodies) 7, 7; tension rolls 10; advancing and retracting cylinders 11; cylinder rods 15; biasing cylinders 30a, 30b feeding drive Roll 33; Drive traveling motor 42; Support shafts 43 and 43; Link 60; Solenoid valve 70; Regulator (pressure control device) 71; Control circuit 72; Solenoid valve 73; Pressure sensor SW; Detection switch M; Sanding motor

Claims (1)

[Claims] 1. A treading body for hanging an endless polishing belt on a belt drive mechanism comprising a plurality of roll groups equipped with a drive motor driven and controlled by a sanding motor, and pressing the endless polishing belt against a work material. A polishing head disposed inside of the material feeding passage is disposed on one side of the material feeding passage. A pressing roll to be urged is disposed, and a pair of feed drive rolls that contact the other side surface of the processed material to drive the processed material are disposed on the other side,
A copying belt sander characterized in that a guide mechanism for guiding the drive shaft of the feed drive roll pair in the approaching direction is provided so that the feed drive roll pair can be moved and adjusted.