JPH02232155A - Belt polishing device - Google Patents

Abstract

PURPOSE:To perform different polishing work without replacing a polishing belt of different polishing roughness by parallelly mounting two or more sets of belt polishing mechanisms in a device placing its press contact pulley respectively in a different position brought into contact with a workpiece. CONSTITUTION:Two sets of drive pulleys 2a, 2b, tension pulleys 3a, 3b and press contact pulleys 4a, 4b link over polishing belts 5a, 5b parallelly placed respectively with different roughness of mesh. The press contact pulleys 4a, 4b are forced to come into press contact with a workpiece and mounted to respective displacement plates 8 displaced in its position coming into press contact with the workpiece. Accordingly, the displacement plate 8 is turned by driving an actuator placing one of the necessary press contact pulleys 4a, 4b in a grinding position. Thus, the workpiece can be polished by any of the required polishing belts 5a, 5b into different roughness without exchanging the polishing belt.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a belt polishing device for polishing and grinding materials using a polishing belt, and more specifically, to
Or it relates to a mobile belt polishing device used in automated equipment such as NC machine tools. [Prior Art] The belt polishing device 1' as described above has a motor 12 as shown in FIG. 4 and a side view, respectively.
A driving pulley 2' rotates via a V-belt 14 when driven by a tensioner I13', which is movable by a horizontal biasing means to prevent loosening of a gf polishing belt 5' such as a sandpaper belt. The winding portion 6' of the abrasive belt 5' is brought into pressure contact with the workpiece, and the workpiece is ground and polished at the processing point A by a pressure contacting boob 4', and a driven bush which guides the abrasive belt 5' relative to the contacting boob 4'. -'J9
', 10' are arranged on parallel axes, and one polishing belt 5' is connected to each pulley 2'.
, 3', 10', 4', and 9'. Such a belt polishing device 1' has a
When abrasive belts with different abrasivenesses, such as sand beaver belts with different counts, are required, the abrasive belts can be manually replaced with the abrasive belts that meet the requirements. [Problem to be solved by the invention] However, the conventional belt polishing device 1 as described above
When the mounting part 15' is connected to a tool mounting member of an industrial robot, NC machine tool, etc. and used as automated equipment, it must be able to operate for a long time without constant human intervention. Then, the belt polishing device 21
'Since one piece of equipment has only one sand paver belt, if sand vapor belts of various sizes are required for grinding and polishing work, automated four-way belts are required.
! ! There were problems such as having to manually replace the sand paver belt after stopping the machine, or installing multiple automated devices each equipped with a sand paver belt of a different size. ．． Therefore, an object of the present invention is to provide a belt polishing device that can switch between a plurality of grinding and polishing operations with different polishing roughnesses using one polishing device without changing the polishing belt. There is a particular thing. [Means for Solving the Problems] In order to achieve the above object, the main means adopted by the present invention is as follows: A belt polishing device comprising a belt polishing mechanism comprising an abrasive belt stretched around the belt, the belt polishing device polishing and grinding the workpiece by running the polishing belt while pressing the part of the polishing belt wound around the pressure pulley against the workpiece. In the belt polishing apparatus according to the present invention, the belt polishing mechanisms described above are installed in parallel at least 2tJ1, and the positions of the pressure contact pulleys of each of the polishing mechanisms are different.

[Effect]

According to the belt polishing device according to the present invention, the belt polishing mechanism includes at least a driving pulley, a tensioning pulley, a pressure contact pulley, and a polishing belt stretched between these pulleys. Two or more sets of abrasive belts with different abrasive roughnesses are installed in parallel, so even when grinding or polishing a workpiece with different abrasiveness levels, the desired abrasive belt can be applied to the pressure pulley. By displacing the belt to a certain point, the above-mentioned grinding and polishing work can be performed without replacing the polishing belt or installing multiple belt polishing devices depending on the roughness of the polishing. [Examples] Examples embodying the present invention will be described below with reference to the attached drawings to provide an understanding of the present invention. It should be noted that the following examples are examples embodying the present invention, and are not intended to limit the technical scope of the present invention. Here, FIG. 1 is a front view of a belt polishing device according to an embodiment of the present invention, FIG. 2 is a side view of the same belt polishing device, and FIG.
The figure is an explanatory diagram showing the state in which the belt polishing device is polishing a workpiece. In the following explanation, the same numerals will be used for elements with the same functions as those of the conventional belt polishing device 1' shown in FIGS. 4 and 5, and detailed explanations of the functions will be omitted. Omitted.

In the belt polishing device 1 according to this embodiment,? As shown in Figures I and 2, the polishing belt 5. , 5b have two sets of belt polishing mechanisms with different running planes. In addition, in order to distinguish between the respective belt polishing mechanisms mentioned above, in the reference numbers of elements in the figures, the suffix a is added to the belt polishing mechanism on the front front side (Figure 1), and the subscript a is added to the belt polishing mechanism on the front rear side (Figure 1). The subscript b is added to . In this embodiment, drive pulley 2a. 2b are coaxially fixed to a transmission shaft 20 which is rotatably supported via a bearing 16 on the upper left side of the front side of the main body frame 13, and the rotation by the drive of the motor 12 is provided on the back side of the main body frame 13. V-belt 14
It is transmitted via . The driven pulleys 91.9+ are rotatably supported independently on the front left side of the upright portion 13c of the main body frame l3, and the driven pulleys 10a, 10
t, are independently rotatably supported on the main body frame 13 on the front right side of the upright portion l3c. Further, the driven pulleys 111 and 11b are independently rotatably supported by the lower end of the upright portion 13c.

? - On the first day of clear actuation, the drive shaft 19 is connected to the driven pulley 11a. , 1] I, and is arranged on the upright portion 13c of the main body frame 13 on the back side thereof. The displacement Fi8, which has a substantially inverted V-shape from the front, is fixed to the drive shaft 19 so as to be swingable in parallel to the plane of the paper (FIG. 1) by the drive of the row reactuator I8, and is fixed to the drive shaft 19 on both sides of the upright portion 13c. The rocking movement is limited by the damper flaps 21, 22 provided on the respective sides. In this embodiment, the swing angle of the displacement plate 8 is
Approximately 50° to the left and right on the paper (Fig. 1) from the vertical axis of
It is set to . The pressure pulley 4 is rotatably supported on the front right end of the displacement plate 8 via a bearing 17a, and the pressure contact pulley 4 is rotatably supported on the front left end of the displacement plate 8 via a bearing 17a. It is rotatably supported on the shaft. At this time, the bearing 171 is
It is formed so as to protrude perpendicularly to the plane of the paper (Fig. 1) compared to the case of 7.

Also, the swing radius of the pressure welding boob U4■ and the pressure welding boob 4b are as follows:
It's slightly different. In other words, 4■ is better than 4t? It also has a long swing radius. At the upper part of the main body frame 13, there is a bearing 23. whose axis is oriented in the horizontal direction parallel to the plane of the paper (FIG. 1). , 23, are arranged, and springs 24 . ,24
Biasing rods 25a, 2 that are biased in the direction of arrow K by b
5i, are supported by the bearings 23a, 23b so as to be slidable in the axial direction. Guide rod 26 ■. 26b
The bearings 23■, 2 are located above the bearings 23■, 231.
The connecting block 27 is slidably supported by bearings (not shown) provided on the main body frame l3 so that the axes of the connecting blocks 27 and 3l are parallel to each other. , 27 and connecting plate 28, , 28,
Since the biasing irons 251.25l and 251.25l are installed differently from each other, they are similarly biased in the direction of arrow K. Furthermore, the guide rods 26, 26l, and 26l are equipped with an air cylinder 29 disposed on the upper front side (Fig. 1) of the bearing (not shown) and a push plate 38 attached to the rod, so that the guide rods 26 and 26l can be easily rotated when the belt is replaced. Moved in the opposite direction. And the said guide Rondo 26■. At the tip of 26b, there is a 3m tension pulley.
．． 3b are each rotatably supported? ing. Polishing belts 5■, which are approximately the same length and have different polishing roughness. 5&
, drive the inner periphery of the band by driving booleans 92&, 2b, and tensile pulleys 3. ,3,, Pressure pulley 4&,4I, and driven pulley 11■. 11+, respectively, and the outer periphery of the band is stretched around the driven pulleys 10a, 10h, and the driven pulleys 9, 91, respectively. The belt polishing device 1 has its mounting portion 15 fixed to a tool mounting member of an industrial robot (not shown), so that it can be transported. When the belt polishing apparatus 1 configured as described above is used for polishing work, only one belt polishing mechanism is placed in a usable state, as shown in FIGS. 1 and 3. For example, when it is desired to use the abrasive belt 5I hung on the pressure contact pulley 4i, the displacement plate 8 is swung in the direction of the arrow M by the rotary actuator 18, and the damper soparator 2
1 and stop it (Fig. 1). At this point, a straight line connecting the axes of the pressure welding boob 41 and the displacement plate 8, and a vertical line of the upright portion 13c? The axis of direction coincides.
The intersection of the straight line at that time and the winding portion 6 of the abrasive belt 5b around the pressure contact pulley 4 is the processing point A.

The abrasive belt 5l), which is rotated by the drive boot 2 rotated by the drive of the motor 12, runs in the direction of the arrow, passes through the tension pulley 31 and the driven pulley 1oi,
This leads to pressure welding pulley 4I. Then, the winding portion 6 at the position of the processing point A is brought into contact with the part to be polished of the workpiece 7 held by the workpiece holder 30, and the workpiece 7
Grinding and polishing work is performed. Further, the polishing belt 5 passes through the driven pulley 9 and returns to the drive pulley 2, and these rotational operations are continuously performed.

Here, since the polishing belt 5 is urged in the direction of arrow K by the tension pulley 3i, it does not loosen, and in this cradling state, it does not come into contact with the driven pulley l11.

At that time, the belt polishing mechanism on the other side, which is not involved in the polishing work, is connected to the part 6. Is machining point A shifted to the right? It's in position. For this purpose, the abrasive belt 5, which rotates in the same direction and at the same speed as the abrasive belt 51, is connected to the driven pulley 10. After passing, drive to the right side of the front and press the pressure boolean 4a + servant booby IJ.
II. ．． and the driven boolean 9■. here,
The tension pulley 3
, it is displaced in the direction of arrow K against the biasing force of spring 241. Subsequently, when grinding or polishing the workpiece 7 by changing the polishing roughness, the row reactuator 18 is driven, and the displacement plate 8 swings in the opposite direction of the arrow M, comes into contact with the dumb bust collar 22, and stops. ．． As a result, the winding portion 6a of the abrasive belt 51 around the pressure contact pulley 4 is at the processing point A. Reach. The abrasive belt 5 is driven by the driven pulley 11. The expansion is done by pressure welding boob 41
is relieved by being displaced to the machining position. As a result, the tension pulley 3■ moves in the direction of arrow K to, for example, the position shown in FIG. 1, 35. At the same time, since the polishing bell 5b is extended by the driven pulley 111, the tensile pulley 31 moves in the opposite direction of the arrow K, for example to the position shown in FIG. 3. As mentioned above, the belt polishing device l can perform grinding and polishing operations with different polishing roughnesses without replacing the polishing belt by displacing the pressure pulley on which the desired polishing belt is applied to the processing point of the belt. You can do it. Furthermore, when the belt polishing device 1 is attached to an industrial robot or an NC machine tool that can freely program the locus of movement of the belt polishing device I1, the position on the workpiece to which the polishing belt is pressed, e.g. It is also possible to change the position to a position where it can be pressed diagonally, as shown in the workpiece shown in Figure 3. In this example, 21! il belt polishing mechanism was adopted, but it is possible to employ three or more sets as long as the mechanical strength allows, and moreover, they can be driven by a single power source. ．． (Effects of the Invention) According to the present invention, the belt polishing mechanism includes at least a drive pulley, a tension pulley, a pressure pulley, and an abrasive belt stretched between these pulleys, and the pressure pulley of the abrasive belt Polish the workpiece by running the abrasive belt while pressing the part wrapped around the workpiece against the workpiece.
The belt polishing device for grinding is characterized in that two or more belt polishing mechanisms are installed in parallel, and the positions of the pressure contact pulleys of each gf@ mechanism are different, so that polishing cannot be performed manually. Grinding and polishing operations with different roughness can be performed without replacing the belt. Also, there is no need to add additional equipment. This prevents an increase in the number of steps and saves space. As a result, the cost of the entire system related to this device is reduced.

[Brief explanation of the drawing]

FIG. 1 is a front view of a belt polishing device according to an embodiment of the present invention, FIG. 2 is a side view of the belt polishing device, and FIG. 3 is a state in which the belt polishing device is polishing a workpiece. The explanatory drawings, FIGS. 4 and 5, show a conventional belt polishing device. [Explanation of symbols] 1. 1'... Belt polishing device 2a, 2b, 2'... Drive pulley L+ 36.3'... Tensing pulley 41.4 et al. 4'...Pressure pulley L+ 56.5'...Abrasive belt 6,,6,,6'...Wrap part 7...Work 8...Displacement plate 91.9k+ 9'...Driver Pulley 10m. 10b
, 10'... Driven pulley 11t, llb... Driven pulley.

Claims (1)

[Scope of Claims] A belt polishing mechanism comprising at least a drive pulley, a tension pulley, a pressure pulley, and an abrasive belt stretched between these pulleys; In a belt polishing device that polishes and grinds a workpiece by running the abrasive belt in pressure contact with the workpiece, two or more sets of the belt polishing mechanisms are installed in parallel, and the positions of the pressure pulleys of each of the polishing mechanisms are different. A belt polishing device featuring: