JPH0542465A - Working device for irregular-shape molded product - Google Patents

Abstract

PURPOSE:To highly precisely work an irregular-shape molded product of a complicated form by providing a working base which is slid by working reaction of a specific value or more and rotatable at the feed speed of the working ability limit of a working means, and a copying mechanism. CONSTITUTION:A working base 2 on which a work piece 1 of an irregular-shape molded product, which base is slid by working reaction of a specific value or more and rotatable at the feed speed of the working ability limit of a working means, and a copying mechanism 3 copying along the end surface of the work piece 1 so that the working tool of the working means regularly makes contact with the end surface of the workpiece 1 in the optimum working state to continuously continue the working are provided. The workpiece in which a cylinder, a rectangle, a flat surface and a curved surface are coexistent is continuously worked. The working base 2 is formed of a first rotating base 7 provided with a rated speed driving device, and a second rotating base 9 placed on the first rotating base 7 through a bearing, and slid or idled by a fixed external force or more.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for processing an irregularly shaped product, and particularly to a processing suitable for use when a processing such as trimming is required after molding such as a molded product made of FRP (fiber reinforced plastic). It relates to the device.

[0002]

2. Description of the Related Art FRP is currently used in products in many fields because of its high strength and light weight, and its manufacturing process is mainly a molding operation using a mold.
In many cases, however, unnecessary substances called burrs are adhered to the edge of the molded product after this molding or a demolding margin is secured, and it is required to remove this.

Normally, such trimming work is performed manually by a worker using a processing means such as a grinder, but in this work dust is generated by cutting. This dust can be sucked by a separately provided dust collecting hood, but since the worker is located in this dust, it is still in a bad environment. Such a problem is F
This is particularly noticeable when manufacturing large containers, bathtubs, boats, etc. with RP, and improvement thereof has been strongly desired.

From the viewpoint of the processing means, it is assumed that an NC-controlled machine tool is used to perform processing such as cutting. However, this type of machine accurately fixes the workpiece and the processing means side is used. Most of them are movable, and this is FRP
It is practically difficult to apply even a molded product having a low rigidity and the same molded product, such as a molded product, to an irregularly shaped product having a different shape accuracy.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and automates almost the entire machining work to eliminate the need for manual work and improve the working environment.
Providing a processing device that can perform predetermined trimming and other processing with high precision even for irregularly shaped products with complicated shapes, does not require accurate setting of the workpiece, and is cost effective The purpose is to do.

[0006]

To achieve this object, a processing apparatus according to the present invention is provided with a workpiece of an irregularly shaped product which is slid by a processing reaction force above a certain level and has a processing capability of the processing means. The worktable, which can rotate at the limit feed speed, and the processing tool of the processing means always contact the end surface of the work piece in the optimum processing state, and follow the end surface of the work piece so that the processing work can be continued continuously. It is characterized by comprising a copying mechanism and continuously processing a cylindrical, rectangular parallelepiped, and an irregularly shaped article in which planes and curved surfaces coexist.

[0007] Therefore, the above worktable includes a first rotary table provided with a constant speed drive device, and a second rotary table that is mounted on the first rotary table via bearings and slides or idles by an external force above a certain level. It consists of a turntable. The first rotary table may be electrically controlled separately so that the number of rotations of the workpiece becomes constant (constant processing load).

Further, the above-mentioned copying mechanism has a predetermined sliding projection on the end surface of the work piece provided at least before and after the working direction of the working tool of the working means, and a predetermined work piece for the work piece moving the sliding projection. And a holding mechanism for holding the processing means and the sliding projection so as to be able to move up and down and move back and forth in the horizontal direction.

Further, the processing apparatus may be provided with a hood for covering the processing tool of the processing means, a dust collecting hose having a tip attached to the hood, and a dust collector having the rear end of the hose connected. In addition, it is preferable that the processing apparatus of the present invention is applied to an indefinitely-formed FRP-made shaped product manufactured by frame molding.

[0010]

According to the present invention, in the actual machining of the work piece, the work table for rotating the work piece at a constant speed is decelerated by slipping or idling due to the working reaction force of the working means whose position is fixed. However, this speed can be set to a speed substantially equivalent to the processing limit capacity of the processing means. Moreover, the machining tool can accurately guide the machining tool along the linear or curved workpiece while maintaining this speed.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in the drawings. 1 and 2 are overall views showing an embodiment of the present invention, in which 1 is an object to be processed, for example, an FRP bathtub formed by a mold, and 2 is an optimum object on which the object 1 is placed. A rotary workbench 3 for rotating and moving at a processing feed speed performs a necessary processing at a required processing position (trimming position) of the workpiece 1 and a processing copying mechanism for continuously performing this processing. Show. Further, in the figure, reference numeral 4 is a dust collector for machining dust attached to the machining copying mechanism 3.

The rotary workbench 2 is required to slide (or idle) due to a processing reaction force of a certain level or more and to be rotatable at a feed speed that is the processing capacity limit of the processing means. For this reason, the rotary work table 2 adopts a two-stage rotary table structure as shown in FIGS. 3 and 4. That is, the fixed cradle 5 at the bottom stage
A circular first rotary table 7 is mounted on the upper surface of the first rotary bearing 6a and the like, and a movable receiving table 8 is integrally installed on the upper part of the first rotating table 7 and further the movable receiving table 8 is installed. A circular second rotary table (work table) 9 is mounted on the plate 8 via the second thrust bearing 6b and the like. Further, a friction wheel (for example, a rubber wheel) 11 for rotation transmission rotated by a rotation drive device (motor) 10 is pressed against the first rotary table 7, and the first rotary table 6 is driven by the drive device 10. Rotates at a predetermined speed, and accordingly, the movable pedestal 7 and the second rotary table 9 placed on the upper part also rotate at the same time.

Usually, the work piece 1 is placed on the second turntable 9, and if necessary, the weight 4 is provided in the light work piece.
3 is mounted, the second rotary table 9 and the work piece 1 are placed on the first rotary table 7 when there is no resistance in the rotation direction.
It will rotate at the same speed as. However, in the actual work, since a processing tool such as a grinder is pressed against the end surface of the work piece 1, a large reaction force is exerted if the feed (rotation) speed of the work piece is faster than its working capacity. If this reaction force is too large, the processing means may be destroyed. Therefore, in the rotary work table 2 of the present invention, when the processing reaction force (external force) above a certain level acts, the first rotary table 7 is driven by the drive unit 1.
Although rotating at the same speed based on 0, the second rotary base 9 slides or idles due to the second thrust bearing 6b. At this time, since the processing means is operating, the work piece is subjected to processing such as cutting, and as a result, the work piece 1 that is continuously receiving the driving force by the drive device 10 is Although it slows down due to slippage, it rotates at a feed rate within the processing capacity limit of the processing means. This feed speed can be obtained in advance in consideration of the set speed of the drive device 10, the processing capacity of the processing means, the thickness of the workpiece, and the like.

As in the case of processing a thin work piece, the reaction force generated by the processing is small and the frictional force between the movable pedestal 8 and the second rotary base 9 is not exceeded, and the second rotary base 9 is prevented. If you think that the car will not slip or spin,
As shown in FIG. 4, a friction force adjusting plate 12 made of rubber or the like is provided inside the second turntable 9 so as to be movable back and forth.
It is preferable that the feed rate is adjusted by appropriately pressing it against the inner circumference of the movable pedestal 8.

Next, a machining copying mechanism which is an important constitution of the present invention will be described. As shown in FIG. 1, FIG. 2 and FIG. 5, the column 13 that holds the entire mechanism is a movable base 14.
A bracket 15 which is erected upright (may be fixed at an arbitrary position) and which moves vertically along the column 13 is provided, and a cantilevered horizontal arm 16 is attached to a side surface of the bracket 15. ing. The bracket 15 is roughly moved up and down by a wire 17a fixed to the bracket 15, for example.
May be rotated in either direction by a winch 17c via a pulley 17b arranged on the upper part of the column 13.

As shown in FIGS. 1, 2 and 6, the arm 16 is provided with a horizontal slider 29 for suspending the head 18 holding the processing means and the copying means.
It is movably held along a certain range. As means for moving the horizontal slider 29, a pulley (belt wheel) 20 driven by a moving motor 19 provided on the back side of the bracket 15 and a driven pulley (belt wheel) 21 provided on the tip side of the arm 16 are connected to the wire (wire). The timing belt) 22 is connected and the motor 19 is operated (see FIGS. 2 and 5).

A first clutch 23 is interposed between the drive pulley 20 and the motor 19 as shown in FIG. 5, and a copying sheave 25 and a brake 26 are provided on the opposite side of the drive pulley 20 via a second clutch 24. Are arranged side by side in the axial direction.
The copying sheave 25 has a balance weight 2 further downward.
Another sheave 28 to which 7 is suspended is connected via a wire. The balance weight 27 applies a pressing force in the horizontal direction to the copying roller that comes into contact with the vertical edge portion of the workpiece to be described later via the sheave.

Further, the horizontal slider 29 and the head 18 are provided with a lifting air cylinder 3 provided on the horizontal slider 29 side.
As shown in FIG. 6, the rod 30a of No. 0 is attached to the head 18 side so that only the tip is locked and the others are loosely fitted, and the rods 30a are connected by interposing a plurality of linear shafts 31. Therefore, the head 18 can be moved up and down by the stroke amount of the air cylinder 30, and the air cylinder 30 is in a free (no load) state during the copying operation described later, and the head 18 applies its own weight to the copying roller.

Next, in the lower part of the head 18, a machining means (a grinder is shown as a machining tool in the illustrated example, a trimming operation of a vertical edge of the workpiece is taken as an example) which directly contacts the workpiece is modeled. Means are suspended. First, as the processing operation, as shown in FIG. 7, an example of cutting and removing the vertical edge portion 1a of the workpiece 1 with the axis of the grinder 32 being vertical is shown, and the driving of the grinder 32 is performed by the base. 1
This is done by connecting the motor 33 on the No. 4 and the grinder shaft 32a with the flexible shaft 34.
Further, the grinder shaft 32a is directly connected to the thin air cylinder 35, and the blade surface of the grinder 32 is moved forward and backward with respect to the edge of the workpiece by driving the cylinder 35.

On the other hand, the direct copying means is for the grinder 32 to always maintain the same direction and the same interval with respect to the edge portion of the workpiece 1, and a plurality of first grinders 32 arranged so as to sandwich the grinder 32 therebetween. 1 small-diameter copying roller 36,
It is composed of a second small-diameter copying roller 37 having an axis in a 90-degree positional relationship with the axis of the copying roller 36. These copying rollers 36 and 37 are housed in a frame 38 so as to constitute one block together with the grinder 32, and the frame 38 is rotatable about the head axis with respect to the lower end of the head 18 as shown in FIG. It is connected via a shaft 39. The shaft 39 enables the copying roller 36 to follow the change of the copying angle in combination with the horizontal pressing force applied by the balance weight 27 during the working operation as described above.

The above-mentioned copying rollers 36 and 37 can be brought close to each other by dealing with small radius and unevenness by changing the mounting position by reducing the diameter and increasing the number as much as possible, but in terms of operation and space. Considering this, it is appropriate that the number of rows is about 4 (see FIG. 8). Of course, grinder 3
It is possible to achieve the purpose if there is one each before and after 2. Further, in the case of processing the horizontal flange portion of the workpiece, the grinder 32 and the copying roller 36 shown in the figure are used.
Turns 90 °.

The frame to which the first small-diameter copying roller 36 is attached has a grinder 3 as shown in FIG.
A hood 40 that covers the periphery of the two is configured. The hood 4
The tip of the dust collecting hose 41 is attached in the cutting direction of 0, and the rear end of the dust collecting hose 41 is connected to the dust collector 4 so that the chips and chips during the cutting work are not scattered to the outside. It is concentrated in places.

The actual operation of the illustrated example will be described below. For example, the mold-molded FRP bathtub 1 is placed on the movable carriage 44, placed on the workbench 2, and fixed in position. In this case, the bathtub 1 does not need to be set at a precisely determined position. Arm 1 of the copying mechanism after the bathtub is set
6 The height position is adjusted by the winch 17c, and the position of the horizontal slider 29 is determined by rotating the pulley 20 by the motor 19. At this time, the first clutch 23 is in the on state and the second clutch 24 is in the off state. Next, the cylinder 30 is operated to lower the head 18, the copying roller 37 is brought into contact with the horizontal flange portion of the bathtub 1, and then the cylinder 30 is brought into a free state. Further, the first clutch 23 is disengaged, and the second clutch 24 is engaged, so that the pulley 20
If the weight of the balance weight 27 is applied to the pulley 20 by connecting the sheave 25 with the sheave 25, a movement force to the bathtub side is generated in the horizontal slider 29 and the head 18, which causes the copying roller 36 to move in the bathtub. The vertical edge portion 1a of 1 is contacted. In this state, the thin cylinder 35 is driven to push the retracted grinder 32 against the vertical edge portion 1a of the bathtub, and at the same time, the motor 33 starts rotating the grinder 32. With the start of driving of the grinder, the rotation of the bathtub 1 is also started by the rotation operation of the workbench 2.

Since the bathtub 1 has a rectangular shape having an R portion at each corner when viewed two-dimensionally, the distance from the center of rotation to the cut position changes each time. Therefore, when the bathtub 1 is rotated in a direction away from the copying roller 36 that comes into contact with the end surface of the bathtub 1, the balance weight 27 acts to cause the copying roller 3 to move.
6 (that is, the head 18 and the horizontal slider 29) follow so as to follow the end surface of the bathtub, and when the bathtub rotates in the direction of pushing back the copying roller 36, the horizontal slider 29 is pushed back to the column side. Even if the angle of the end surface of the bathtub changes, the copying roller 36 can cope with this by the shaft 39. Therefore, the position of the horizontal arm 16 is fixed, but the horizontal slider 29 inside the horizontal arm 16 repeats the reciprocating motion along the arm 16 according to the shape of the workpiece. Moreover, when a reaction force larger than that of the straight portion is applied to the grinder 32 like the R portion, the feed speed is automatically reduced and the workpiece is rotated at the optimum processing speed.

The present invention is not limited to the illustrated example, but can be arbitrarily modified within the scope of the present invention. For example, the structure and shape of each part can be replaced with other appropriate structure and shape as long as they can perform the same function, and a drive source for performing vertical movement, elevation, horizontal movement, rotation, etc. of each part. As a matter of course, the present invention is not limited to the one shown in the figure, and may be replaced with another known method. Further, in the present invention, an example of cutting the outer end surface of the work piece is shown,
It is also possible to cut the inner peripheral surface side of the workpiece, and in that case, it is also possible to adopt a method in which a separate and independent copying block is created and copied. This copying block can also be applied to small R machining.

[0026]

According to the processing apparatus of the present invention described above, the following effects can be expected. During machining work, the workpiece side is moved, and the workpiece simply follows the vertical and horizontal directions according to the workpiece,
Since the position is almost fixed and the machining tool is accurately guided by the copying machine, even if the setting of the work piece is slightly misaligned, the machining tool will follow without any trouble, and the machining will be performed accurately to the target fixed scale. can do. The feed speed of the workpiece can be maintained within the range of the processing capacity after the start of the processing, and the work can be always performed at the optimum speed. It is possible to accurately respond to each irregularly shaped product with simple and inexpensive equipment without the need for a mother die (template), which is indispensable in conventional copying machine tools. Local dust collection is possible and dust leakage can be prevented, contributing to environmental improvement.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a processing apparatus according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a plan view of a workbench used in the present invention.

FIG. 4 is a front sectional view of a workbench.

FIG. 5 is a front view of a column portion of the machining copying mechanism according to the present invention.

FIG. 6 is a cross-sectional view showing a main part of a machining copying mechanism according to the present invention.

FIG. 7 is a sectional view showing a copying roll and a processing tool according to the present invention.

FIG. 8 is an enlarged view of a copying roll and a processing tool.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Workpiece 2 Rotating workbench 3 Machining copy mechanism 4 Dust collector 6 Thrust bearing 7 1st rotary table 9 2nd rotary table 10 Drive device 11 Friction wheel 13 Strut 15 Bracket 16 Horizontal arm 17c Winch 18 Head 19 Motor 20 Drive pulley 27 Balance weight 29 Horizontal slider 30 Cylinder 32 Grinder 36, 37 Copying roller 39 Swivel axis

Claims (5)

[Claims] 1. A workbench capable of sliding an indefinitely shaped workpiece to be slid by a reaction force of a certain level or more and rotating at a feed speed at the limit of the machining capacity of the machining means, and a machining tool of the machining means. It consists of a copying mechanism that follows the end surface of the work piece in an optimal processing state and follows the end surface of the work piece so as to continue the working operation continuously, and cylinders, rectangular parallelepipeds, flat surfaces and curved surfaces coexist. An apparatus for processing an irregularly shaped product, which is capable of continuously processing a workpiece. 2. The workbench is a first work station to which a constant speed drive device is attached.
The processing apparatus according to claim 1, comprising a rotary table and a second rotary table that is mounted on the first rotary table via bearings and slides or idles by an external force above a certain level. 3. The copying mechanism comprises a copying sliding projection provided on at least an end surface of a workpiece provided in front of and behind a machining tool of a machining tool of a machining means, and a predetermined force to a workpiece moving the sliding projection. 3. The processing apparatus according to claim 1 or 2, comprising a pressing mechanism for pressing with and a holding mechanism for holding the processing means and the sliding projection so as to be able to move up and down and move back and forth in the horizontal direction. 4. A hood for covering the processing tool of the processing means, a dust collecting hose having a tip attached to the hood, and a dust collector having a rear end of the hose connected thereto. The processing device described. 5. An F produced by forming a work piece by molding.
The processing apparatus according to any one of claims 1 to 4, which is an irregularly shaped product made of RP.