JPS6335387B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a belt grinding device for grinding a workpiece with an abrasive belt.

Conventional technology and problems Technical magazine "Machinist" VOL28, No.9, No.51
The latest grinding machines are listed on the page. According to this, by preparing grindstones molded into various shapes and controlling their movements in various combinations, it is possible to finish many kinds of shapes. On the other hand, if a conventional abrasive belt is used instead of a grindstone, work safety and work efficiency can be improved, but there is a problem that shape conformity to the finished shape is low. An object of the present invention is to provide a belt grinding device that uses an abrasive belt and has high shape conformability and excellent grinding ability.

Means and Effects for Solving the Problems In order to solve the above problems, a belt grinding device according to the present invention is a belt grinding device that grinds a workpiece with an abrasive belt, and includes a main body of the device and a main body of the device. A grinding head cartridge is detachably attached to the grinding head cartridge, and the grinding head cartridge includes a support member formed in an elongated shape, and a drive rotatably provided at one end of the support member on the side of the apparatus main body. a pressing member provided at the other end of the support member and formed in a shape corresponding to the workpiece to press the abrasive belt against the surface of the workpiece; The abrasive belt, which is endless and capable of running, is stretched between the pressing member and the abrasive belt, and the apparatus main body includes a storage section that removably accommodates the drive roller side of the grinding head cartridge, and the grinding head cartridge. and a drive means that engages with the drive roller and rotates the drive roller when the drive roller is accommodated. Therefore, the drive roller applies a driving force to the abrasive belt, and the abrasive belt rotates along the pressing member and is pressed against the surface to be processed. This pressing member can be given various shapes, and various shapes can be prepared as grinding head cartridges. When the grinding head cartridge is attached to the apparatus main body, the drive roller of the grinding head cartridge engages with the drive means of the apparatus main body, and rotational force is transmitted to the abrasive belt. The driving means of the apparatus main body is preferably formed by an endless transmission belt, so that the drive roller and the endless transmission belt are in surface contact at the same time as the grinding head cartridge is attached to the apparatus main body. Preferably, if the support member includes a built-in spring that biases the driving roller and the pressing member away from each other, the pressing force of the abrasive belt along the surface to be processed can be made almost constant, and the surface to be processed can be can better accommodate the shape of

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In Figures 1 and 2, 1 is the main body of the device, 2
3 is a grinding head cartridge, 3 is an endless abrasive belt, and 4 is an endless power transmission belt. The grinding head cartridge 2 is removably attached to the apparatus main body 1 by a collector-like ring-shaped threaded locking member 5, and the drive roller 10 at the upper end of the grinding head cartridge 2
is engaged with the transmission belt 4 to apply a driving force to the polishing belt 3, and at the same time, the pressing member 11 at the lower end thereof is protruded, and the polishing belt 3 stretched thereon engages with and grinds the surface to be processed.

The structure of the grinding head cartridge 2 will be explained first. Figures 3 to 5 show the detailed structure of the grinding head cartridge 2, and while the shape of the lower end portion is different from that of Figures 1 and 2, most of the shapes are the same. . According to the invention,
As described above, by preparing a plurality of grinding head cartridges 2 with different lower end portions, it is possible to grind a desired surface, and FIGS. 6 and 7 are further examples of such lower end portions. It is shown.

In the grinding head cartridge 2 shown in FIGS. 3 to 5, an endless polishing belt 3 is stretched between a driving roller 10 and a pressing roller or a pressing member 11 having a pressing sliding surface at the upper and lower ends, respectively. . The pressing member 11 is used in place of a rotating roller or pulley that is generally used to support the belt, and slides on the back surface of the polishing belt 3. Therefore, forming the lower part of the grinding head cartridge 2 in various shapes means forming the sliding surface of the pressing member 11 in various shapes, for example, as shown in FIGS. 1 and 2. The one shown in the figure is suitable for surface grinding, and the one shown in FIGS. 3 to 6 a and b is suitable for curved surface grinding under NC control etc. The one shown in FIG. 6c is suitable for finishing a horizontal wall surface flatly. The width of the polishing belt 3 can be changed depending on the shape of the pressing member 11, and the cross-sectional shape of the polishing belt 3 can also be changed as shown in FIG. FIG. 7 shows a pressing member in which a polishing belt is attached to an elastic member A having a semicircular cross section so as to be suitable for grinding a three-dimensional free-form surface. The pressing member may be hard or elastic, and can be selected depending on the purpose of use.

In FIGS. 3 to 5, the drive roller 10 and the pressing member 11 are interconnected and held by a support member. This support member includes a longitudinal center member 12 that is integrally formed as an extension of the pressing member 11 or formed separately and fixed to the pressing member 11, and a bracket 13 that rotatably supports the drive roller 10.
and a longitudinal outer circumferential member 14 extending outside of the longitudinal center member 12. The longitudinal center member 12 has an H-shaped cross section as shown in FIG. It is arranged inside the member 14. Longitudinal center member 1
An arcuate member 15 is interposed between 2 and the longitudinal outer peripheral member 14, and the arcuate member 15 is fixed to the outer peripheral member 14 with screws or the like and is arranged with a slight gap from the central member 12. . Therefore, the central member 12 is relatively movable using the arcuate member 15 as a guide. As shown in FIG. 5, the aforementioned bracket 13 is fixed to the arcuate member 15 and engaged to the central member 12 by means of a pin 16. As shown in FIG. The pin 16 is attached to both these members 12 and 13.
The central member 12 is longitudinally movable relative to the bracket 13.

A longitudinal hole is formed in the central member 12, in which a spring 17 and its upper and lower piston-like members 18, 19 are arranged. As is clear from FIG. 5, the lower piston-like member 19 can be changed in position by an adjusting screw 21 via a ball 20, and by operating the adjusting screw 21, the spring 17 can be changed.
The spring force is adjustable. The upper end of the upper piston-like member 18 passes through a stepped hole formed in the bracket 13 and is fixed to the bracket 13 by a retaining ring or the like. Therefore, the central member 12 can move in the axial direction relative to the bracket 13 and the arcuate member 15, but since the abrasive belt 3 is stretched between them, they will not come off, and the spring 17 will not disengage. The spring force will provide proper belt tension.

A shaft 22 is attached to the bracket 13, and the aforementioned driving roller 10 is rotatably attached to the shaft 22 via a bearing. As shown in FIG. 5, the drive roller 10 has two parts coaxially and offset, the abrasive belt 3 is applied to the left part in FIG. and the transmission belt 4 explained in FIG. 2 are brought into contact with each other. Therefore, when this grinding head cartridge 2 is attached to the apparatus main body 1, the right side portion of the drive roller 10 comes into contact with the transmission belt 4 of the apparatus main body 1, and the transmission belt 4 is connected to the drive source of the apparatus main body 1. Therefore, when the rotation is transmitted to the drive roller 10, the drive roller 10 drives the polishing belt 3, and the polishing belt 3 is pressed against the workpiece together with the pressing member 11, and the polishing belt 3 scrapes the surface to be polished. . Four pins 23 protruding from the outer peripheral surface of the longitudinal outer peripheral member 14 are attached.

Referring to FIGS. 1 and 2, the upper half of the grinding head cartridge 2 configured as described above is inserted into the apparatus main body 1, and the outer peripheral member 14 of the grinding head cartridge 2 is inserted into the lower half of the apparatus main body 1. The cylindrical portion 24 is fitted with a cylindrical portion 24 formed correspondingly to the cylindrical portion 24, and the cylindrical portion 24 is provided with an internally threaded flange or a ring 25 that is latched at a certain position. The grinding head cartridge 2 is attached to the apparatus main body 1 by being screwed into the flange 25 while contacting the protruding pin 23 of the outer circumferential member 14 on the other hand, and the locking member 5 is loosened by loosening the screw of the flange 25. By removing it, the grinding head cartridge 2 is removed. Thus, when the grinding head cartridge 2 is attached to the cylindrical portion 24,
The driving roller 10 is in contact with the transmission belt 4 and is connected to the driving force.

The apparatus main body 1 has a main shaft 26 in the axial direction of the apparatus main body 1 connected to a motor (not shown), etc., and a bevel gear 27 is attached to the main shaft 26. In this embodiment, the main shaft 26 is connected to the main shaft of the machine by a tapered connection, but an independent drive motor may be provided in the main body 1 of the apparatus. On the other hand, the power transmission belt 4 is stretched around three rollers 28 that extend perpendicularly to the main shaft 26, and therefore its support shaft 29 (Fig. 2) also extends perpendicularly to the main shaft 26 and is supported by three rollers 28 extending at right angles to the main shaft 26. A second bevel gear 30 is attached to the shaft 29. Due to the meshing of these bevel gears 27 and 30, the rotation of the main shaft 26 is transmitted to the support shaft 29 and the roller 28, and the driving force is transmitted to the polishing belt 3 via the transmission belt 4 and the drive roller 10. At this time, the housing 41 of the device main body 1 is locked to a key 43 fixed to a fixed portion 44 of the spindle head via an engaging member 42. Therefore, main shaft 2
6 has a structure in which the housing 41 of the device main body 1 does not rotate even if it rotates.

Effects of the Invention As explained above, according to the present invention, the grinding head consisting of the abrasive belt stretched between the drive roller and the pressing member is formed as a cartridge, and such a cartridge can be easily attached to and detached from the main body of the apparatus. Therefore, if you prepare grinding head cartridges with pressing members and abrasive belts of various shapes in advance, you can freely select and use them depending on the surface to be ground. A belt grinding device was obtained that has excellent compatibility and is easy to operate such as replacing the abrasive belt.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a belt grinding device according to the present invention, FIG. 2 is a block diagram of a cross section perpendicular to FIG. 1, and FIG.
The figure is a sectional view of the grinding head cartridge, FIG. 4 is a sectional view taken along the line - of FIG. 3, and FIG.
FIG. 6 is a cross-sectional view taken along line - in the figure, FIG. 6 is a diagram showing examples of various shapes of the pressing member, and FIG. 7 is a diagram showing still another example of the pressing member. 1... Device main body, 2... Grinding head cartridge, 3... Polishing belt, 4... Transmission belt, 5...
... Locking member, 10 ... Drive roller, 11 ... Pressing member, 12 ... Longitudinal center member, 13 ... Bracket, 14 ... Outer peripheral member, 17 ... Spring, 23 ...
Pin, 24... Cylindrical part of the main body of the device.

Claims (1)

[Scope of Claims] 1. A belt grinding device for grinding a workpiece with an abrasive belt, which consists of a device main body and a grinding head cartridge detachably attached to the device main body, the grinding head cartridge being detachably attached to the device main body. , a support member formed in an elongated shape, and a drive roller rotatably provided at one end of the support member on the side of the device main body;
a pressing member provided at the other end of the support member and formed in a shape corresponding to the workpiece to press the abrasive belt against the surface of the workpiece, the driving roller and the pressing member; The abrasive belt, which can run endlessly, is stretched between the abrasive belt and the abrasive belt. A belt grinding device comprising: a drive means that engages with the drive roller and rotates the drive roller. 2. The driving means of the apparatus main body includes an endless transmission belt connected to a rotational drive source, and when the grinding head cartridge is housed in the apparatus main body, the endless transmission belt and the drive roller are brought into surface contact. The belt grinding device according to claim 1, wherein the belt grinding device is configured such that the rotational force of the rotational drive source is transmitted to the drive roller. 3. The belt grinding device according to claim 2, wherein the drive roller has a portion on which the endless abrasive belt is applied and a portion that comes into contact with the endless power transmission belt at coaxially shifted positions. 4. The belt grinding device according to claim 3, wherein the endless power transmission belt is stretched around at least three rollers within the device main body. 5. The driving means for the device main body includes a housing of the device main body that is attached to a rotating main shaft of a machine having a rotating main shaft via a bearing, and a locking device that prevents the housing from rotating on a fixed part of the machine.
a first bevel gear attached to the rotating main shaft of the machine; and a second bevel gear that is rotatably supported by the housing, rotates about an axis perpendicular to the axis of the rotating main shaft of the machine, and meshes with the first bevel gear. , a first roller that is pivotally supported by the housing and rotates coaxially and integrally with the second bevel gear; and second and second rollers that are pivotally supported by the housing and each have an axis parallel to the first roller. 3 rollers, and an endless transmission belt stretched between the first, second, and third rollers, and when the grinding head cartridge is housed in the apparatus main body, the endless transmission belt and the drive The belt grinding device according to claim 1, wherein the belt grinding device is configured so that the belt is in surface contact with the roller. 6. The support member of the grinding head cartridge is:
6. The belt grinding device according to claim 1, further comprising a built-in spring that urges the driving roller and the pressing member away from each other. 7. The belt grinding device according to claim 6, wherein the spring has an adjustable spring force. 8. The supporting member has a cylindrical portion forming the outer shape of the grinding head cartridge, and the cylindrical portion is fitted into a hollow cylindrical portion formed as the accommodating portion of the apparatus main body. A belt grinding device according to claim 1. 9. The belt grinding device according to any one of claims 1 to 8, wherein the grinding head cartridge is attached to the device main body by a threaded locking member.