JPH06759A - Profile sander for polishing corner section of frame-like member - Google Patents

Abstract

PURPOSE:To provide a polishing machine capable of automatically polishing the corner section of a frame-like member such as the window frame of an automobile. CONSTITUTION:A profile sander 1 for polishing the corner section of a frame- like member is provided with a work holding device 20 holding the frame-like member, i.e., a work, and a sanding belt V traveled in the endless belt state in contact with the work on the work holding device 20, and the work holding device 20 is rotated in the range of a fixed angle centering on the machining position in this polishing device.

Description

Detailed Description of the Invention

[0001]

[Object of the Invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic polishing machine for polishing a corner portion of a frame-shaped member used for polishing and finishing a weld bead on a corner portion of an automobile window frame, for example. In particular, it relates to a profile sander using a sanding belt as a polishing means.

[0002]

2. Description of the Related Art Conventionally, when polishing a weld bead on a corner portion of a window frame of an automobile, the complexity of the window frame shape, the variety of window frame shapes due to the difference in the vehicle type, and the bead type. As a result, it is extremely difficult to automate the polishing process, and most of them have been done manually. This is often done as a grind processing means of these metal workpieces, grind processing by a grindstone, in performing such grinder processing, it is necessary to securely hold the workpiece, This is because various factors such as the complexity of the shape of the work piece become an obstacle, and it is extremely difficult to reliably hold the work piece.

[0003]

[Technical Items Attempted to Develop] The present invention has been made from such a background, and by using a sanding machine using a sanding belt as a means for polishing such a metal workpiece, This is to propose a new polishing machine that eliminates the difficulty and makes it possible to automate this type of polishing.

[0004]

[Constitution of the invention]

That is, a first invention of a profile sander for polishing a corner portion of a frame-shaped member according to the present application is a work holding device for holding a frame-shaped member which is a workpiece, and a work to be processed in the work holding device. In a polishing processing apparatus comprising a sanding processing plate equipped with an endless belt-like running sanding belt that is in sliding contact with an object, the work holding device is configured to rotate within a fixed angle range about a processing operation position. It is characterized by being configured.

The second invention of the profile sander for polishing the corner portion of the frame-shaped member according to the present application is, in addition to the above requirements, that the work holding device swings in a range of a constant angle about the rotation axis. The corner base that supports the corners of the frame-shaped member that is the workpiece, the frame base that supports the frame of the frame-shaped member, and the frame-shaped members are fixed to these bases. A corner chucking device, a frame side stopper, and a frame upper stopper are provided.

Furthermore, in addition to the above requirements, the third invention of the profile sander for polishing the corner portion of the frame-shaped member according to the present application is such that the sanding machine has a drive pulley, a tension pulley and a fixed pulley. An endless belt sanding belt is wound around the pulley,
Between the tension pulley and the fixed pulley, a pressing roll that comes into contact with the back surface of the sanding belt and presses the sanding belt against a frame-shaped member as a workpiece is provided so as to be retractable. Is.
The above objects are intended to be achieved by these inventions.

[0007]

According to the present invention, since a sanding machine using a sanding belt is used as a means for polishing a work piece, it is possible to set a large working area in contact with the work piece for polishing. . Further, since the work holding device can swing in a range of a certain angle, the traveling direction of the sanding belt with respect to the workpiece can be appropriately changed. Further, by adjusting the pressing amount of the pressing roll, the pressing force of the sanding belt applied to the workpiece can be changed.

Further, according to the present invention, a corner supporting base and a frame supporting base are provided on the swing base, and a frame-shaped member as a workpiece is placed on these, and a corner chucking device,
The frame-shaped member, which is a workpiece, is held by sandwiching the frame-shaped member between the corner support and the frame support by the frame side stopper and the frame upper stopper.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The profile sander for polishing a corner portion of a frame-shaped member of the present invention will be specifically described below with reference to the drawings. Reference numeral 1 in the drawing is a profile sander of the present invention, which is used for polishing a metal frame member such as a window frame of an automobile. In the following description, the case of polishing the corner portion c of the automobile window frame F will be described as an example.

The profile sander 1 of the present invention is a base portion 1
In contrast to 0, a work holding device 20 that holds a window frame F as a workpiece on its upper surface and rotates in a range of a fixed angle is provided, and a movement that can slide forward and backward and up and down behind the base portion 10 is provided. A gantry 30 is provided, and a sanding board 40 for polishing the window frame F, which is a workpiece, is tiltably provided on the movable gantry 30.

The base portion 10 is a skeleton member formed by assembling an angle member or the like into a rectangular parallelepiped shape, a top plate 11 having a relatively thick top surface, side plates 12 having a relatively thin wall on the left and right side surfaces,
Although not shown, a back plate and a bottom plate are attached to the back and bottom, respectively, and a door 13 that opens and closes to the left and right is attached to the front as an example. Also, the side plate 1 on the left side of the base unit 10
2 is provided with a swing drive device 15 as a drive source for swinging a work holding device 20 described later, and
An operation box 6 is provided at the upper end of the stay 5 that extends to the side and then extends upward. Further, a support guide 7 formed in an arch shape is provided behind the top plate 11 on the upper surface of the base 10, and the support guide 7 supports the front end of the frame part f of the window frame F. There is.

A work holding device 20 is provided on the top plate 11 on the upper surface of the base 10 thus constructed. The work holding device 20 is a swing base 22 having a fan-shaped planar shape that swings in a range of a constant angle about a rotary shaft 21 provided at a substantially machining position, and a corner portion of a window frame F is provided on an upper surface thereof. Corner support 23 that supports c
And a frame part support base 24 that supports a part of the frame part f of the window frame F.
And a corner chucking device 25 for fixing the window frame F to the corner support 23, the frame support 24, a frame side stopper 26, and a frame upper stopper 27. Further, on the lower surface of the swing base 22, like the swing base 22, a fan-shaped gear 28 having a flat fan shape is formed.
And the rack 28 engraved on the side peripheral portion of the fan-shaped gear 28.
A pinion gear 29 that meshes with a is provided.

The drive from the swing drive device 15 is transmitted to the pinion gear 29. Specifically, the output of the swing drive device 15 is transmitted from the drive sprocket 16 to the driven sprocket 17 by the chain 18, and the rotation transmitted to the driven sprocket 17 is corrected in the rotation direction by the relay bevel gear 19 to cause the pinion gear 29 to rotate. Will be finally transmitted to.

On the other hand, the corner support 23 provided on the upper surface of the swing base 22 is located at the center of the fan of the fan-shaped swing base 22, and the upper surface of the corner support 23 is smooth to support the window frame F. Has been done. Also, this corner support 23
A frame support 24 is provided at a position slightly moved from the swing base 22 to the side circumferential side. The frame support base 24 is a plate-like member provided on the side L-shaped holding bracket B such that its height position can be adjusted.

Further, the corner chucking device 25 is
The window frame F is intended to be fixed by abutting the inside of the corner c of the window frame F in a state where the window frame F is placed on the corner support 23 and the frame support 24. It is composed of a chevron piece 25a that directly abuts the inside of the portion c, and a corner cylinder 25b that moves the top of the chevron piece 25a forward or backward toward the corner c of the window frame F. The frame portion side stopper 26 is a member that supports the frame portion f of the window frame F from the outer side, and includes a rotating piece 26a that directly abuts on the frame portion f, and the rotating piece 26a.
It is composed of a rotary actuator type side cylinder 26b that rotates over an angle of °.

Further, the frame upper stopper 27 is a member for pressing the frame f of the window frame F from above and sandwiching and holding the window frame F between the corner support 23 and the frame support 24. This is composed of a planar rectangular pressing piece 27a that directly abuts the frame portion f, and a pressing cylinder 27b that slides the pressing piece 27a in the vertical direction. Further, limit switches 8 are provided on the left and right sides of the swing base 22 on the top plate 11 of the base unit 10, and the limit switches 8 determine the left and right rotation limits of the swing base 22.

From the rear side to the upper side of the base portion 10, a movable base 30 is provided so as to be slidable forward and backward and up and down. Specifically, a support base 31 for supporting the moving base 30 is provided from the back surface of the base 10 to the rear, and the base 33 is slidable with respect to a guide rail 32 laid on the upper surface of the support base 31. Engage. A pedestal frame 34 supported by the pedestal base 33 and rising upward is provided with a guide rail 35 in the up-down direction. The guide rail 35 engages with the guide rail 35 and can slide in the up-down direction. A movable mount 30 is provided in the. Further, on the tip end side of the movable pedestal 30, there is provided a rotation support portion 36 for tiltably supporting a sanding processing board 40 described later.

The sanding board 40 tiltably provided with respect to the rotation support portion 36 has a drive motor 42 mounted on an upper portion of a support frame 41 directly supported by the rotation support portion 36. The traveling mechanism 43 of the sanding belt V, which will be described below, is driven by 42 to press the pressing roll 50 provided at the lower portion of the support frame 41 against the back surface of the sanding belt V, and further to some extent by pushing it toward the workpiece side. The sanding belt V is brought into contact with the work piece to polish the work piece.

The traveling mechanism 43 includes a drive pulley 44 provided on the output shaft of the drive motor 42 and a support frame 41.
The tension pulley 45 and the fixed pulley 46 provided on the lower left and right sides of the drive pulley 44, and the sanding belt V wound between the drive pulley 44, the tension pulley 45, and the fixed pulley 46. Further, the pressing roll 50 is provided so as to be retractable at a position substantially in the middle of the tension pulley 45 and the fixed pulley 46, and the pressing roll 50 is positioned above the sanding belt V at least in the retracted position. However, it does not come into contact with the sanding belt V, but comes into contact with the sanding belt V at the protruding position, and the working surface of the sanding belt V is located below the tension pulley 45 and the fixed pulley 46 located on the left and right of the pressing roll 50. The stroke required to bring the working surface of the sanding belt V into contact with the work piece is required.

Next, a description will be given of how the corner portion c of the window frame F of an automobile is actually ground by using the profile sander 1 of the present invention thus constructed. The window frame F of the automobile is made by welding the frame portion f at the corner portion c as shown in FIG. 4 due to the complexity of its shape. The welded portion at the corner portion c of the window frame F thus formed is Weld beads b are formed.

Then, the window frame F, which is a workpiece, is set on the work holding device 20 in order to polish the weld bead b at the corner portion c of the window frame F by the profile sander 1 of the present invention. The operator is in the corner c of the window frame F.
Is set on the corner support 23, and the frame part f is set on the frame support 24. Then, a predetermined operation button in the operation box 6 is pressed to operate the corner chucking device 25, the frame side stopper 26, and the frame upper stopper 27, and the window frame F is fixed to the work holding device 20.

Then, the operator presses a predetermined start-up switch on the operation box 6 to start polishing the profile sander 1 of the present invention in accordance with a preset processing program. Needless to say, the tilting angle of the sanding processing board 40, the position setting of the movable pedestal 30, the adjustment of the stroke position of the pressing roll 50, and the like need to be performed in advance according to the shape of the workpiece. .

The sanding board 40, which receives the command from the start switch, rotates the drive motor 42,
The sanding belt V is caused to run around the drive pulley 44, the tension pulley 45, and the fixed pulley 46 by rotating the drive pulley 44 provided at the tip of the output shaft. At the same time, the movable base 30 also starts moving, and the pressing roll 50 is positioned on the corner portion c of the window frame F. Then, the pressing roll 50 projects toward the window frame F side, pushes the back surface of the sanding belt V to bring the working surface of the sanding belt V into contact with a predetermined portion of the corner portion c of the window frame F, and perform the polishing process. In the polishing process, the swing drive device 15 is driven to swing the work holding device 20 so that the surface of the welding beat b can be uniformly processed. In addition, the stroke of the pressing position of the pressing roll 50 is changed in synchronization with the swinging movement of the work holding device 20, the tilt angle of the sanding processing board 40, and the moving platform 3 are changed.
It is of course possible to adjust the moving position of 0.

After the series of machining programs is completed, the pressing roll 50, the sanding machining board 40, and the movable pedestal 30 return to their predetermined origin positions, and the frame side stoppers 26 and the frame upper stoppers of the work holding device 20. 27 is released, and thereafter, the slider of the corner cylinder 25b in the corner chucking device 25 is further extended, and the chevron piece 2 provided at the tip thereof.
The window frame F polished by 5a is pushed forward. Then, the slider of the corner cylinder 25b contracts to the initial position again, and the operator is ready to set the next window frame F.

In the above embodiment, the sanding machine 4 is used.
0 is a type in which the sanding belt V runs on a substantially triangular orbit, but an appropriate shape can be applied according to the shape of the workpiece. Further, in the above-mentioned embodiment, the setting of the workpiece is performed manually, but it is of course possible to automate all the steps including the setting, the removal and the transfer to the next step. Further, depending on the work piece, high surface processing accuracy may be required. To perform such work piece polishing, two sanding work boards 40 are provided, and each sanding work board 40 has a rough surface. It is also possible to attach two types of sanding belts V having different heights and perform the polishing process in two steps.

[0026]

The profile sander 1 of the present invention is constructed as described above and exhibits the following effects. First of all, in the present invention, since the processing means by the sanding belt V is adopted as the means for polishing the work piece, the working area for the work piece can be wide,
Along with this, it becomes possible to perform polishing without firmly fixing the workpiece. That is, the pressing force applied to the work piece by the sanding belt V also contributes to fixing the work piece. Therefore, even if a deformed component such as a frame-shaped member, which is the object of the present invention, is difficult to fix, the work piece is held. The holding of the workpiece by the device 20 ensures reliable holding, and accordingly, the polishing process becomes possible.

Further, by swinging the work holding device 20, the working direction of the sanding belt V can be changed at any time, and it is possible to prevent deviation in the working. With these, it becomes possible to automate the polishing process of this type of workpiece, which has been difficult in the past.

[Brief description of drawings]

FIG. 1 is a front view showing a profile sander for polishing a corner portion of a frame-shaped member of the present invention.

FIG. 2 is a right side view of the above.

FIG. 3 is a plan view showing the same sanding processing board omitted.

FIG. 4 is an enlarged perspective view showing the periphery of the work holding device.

FIG. 5 is a plan view showing a work holding device.

FIG. 6 is an auxiliary projection diagram showing a state seen from the arrow A in FIG.

[Explanation of symbols]

 1 Profile Sander 5 Stay 6 Operation Box 7 Bearing Guide 8 Limit Switch 10 Base Part 11 Top Plate 12 Side Plate 13 Door 15 Swing Drive Device 16 Drive Sprocket 17 Driven Sprocket 18 Chain 19 Relay Bevel Gear 20 Work Holding Device 21 Rotation Axis 22 Swing base 23 Corner support 24 Frame support 25 Corner chucking device 25a Angle piece 25b Corner cylinder 26 Frame side stopper 26a Rotating piece 26b Side cylinder 27 Frame upper stopper 27a Pressing piece 27b Pressing cylinder 28 Fan-shaped gear 28a Rack 29 Pinion gear 30 Moving stand 31 Support stand 32 Guide rail 33 Stand base 33a Rail holder 34 Stand frame 35 Guide rail 36 Rotation support part 40 Sanding processing Board 41 Support frame 42 Drive motor 43 Travel mechanism 44 Drive pulley 45 Tension pulley 46 Fixed pulley 50 Pressing roll b Welding bead B Holding bracket c Corner part f Frame part F Window frame V Sanding belt

Claims (3)

[Claims] 1. A polishing comprising a work holding device for holding a frame-shaped member as a work, and a sanding work plate equipped with an endless belt-shaped running sanding belt that slidably contacts the work in the work holding device. In the processing apparatus, the work holding device is configured to rotate within a range of a constant angle about a processing operation position, and a profile sander for polishing a corner portion of a frame-shaped member. 2. The work holding device comprises: a swing base that swings about a swing shaft within a certain angle range;
A corner support base that supports the corner of the frame-shaped member that is the workpiece, and a frame support base that supports the frame of the frame-shaped member,
2. A corner portion polishing profile for a frame member according to claim 1, further comprising a corner chucking device for fixing the frame member to these pedestals, a frame side stopper and a frame upper stopper. Sanda. 3. The sanding machine has a drive pulley, a tension pulley, and a fixed pulley, and an endless belt-shaped sanding belt is wound around these pulleys, and between the tension pulley and the fixed pulley. The corner of the frame-shaped member according to claim 1 or 2, wherein a pressing roll that abuts against a back surface of the sanding belt and presses the sanding belt against a frame-shaped member that is a workpiece is provided so as to be retractable. Profile sander for polishing parts.