Patent Application
20140201926
1. Field of the Invention
This invention relates to a chamfering machine, and more particularly to an edge-band chamfering machine capable of receiving a trimming tool.
2. Description of the Related Art
Referring to
To chamfer a top side of an edge band 100 adhered to a side surface 102 of a workpiece 101, the bottom surface of the positioning portion 112 is brought into contact with the top surface 103 of the workpiece 101, and, subsequently, the cutter 123 is moved along the edge band 100.
However, when the edge band 100 is thin, since the edge-band chamfering machine is bulky, and since the power output of the motor 122 is relatively large, it is difficult to use the edge-band chamfering machine, and too many chips are produced, so that a manual trimming tool is required, thereby resulting in inconvenience during use.
The object of this invention is to provide an edge-band chamfering machine capable of receiving a trimming tool to increase applicable range of the edge-band chamfering machine.
According to this invention, an edge-band chamfering machine includes a supporting frame unit, a driving unit, and a tool assembly. The supporting frame unit includes a mounting portion defining a vertical mounting hole, and a positioning portion having an abutment surface and a receiving groove. The driving unit is disposed within the mounting hole, and includes a spindle and a cutter disposed on the spindle for performing a chamfering operation on an edge band. The tool assembly includes a connecting member disposed pivotally on the positioning portion, and a trimming tool disposed removably on the connecting member. The tool assembly is convertible between a tool-taking position, where the tool assembly extends outwardly from the abutment surface, and a tool-concealing position, where the tool assembly is concealed within the receiving groove.
Due to the presence of the tool assembly, the applicable range of the edge-band chamfering machine is increased.
These and other features and advantages of this invention will become apparent in the following detailed description of a preferred embodiment of this invention, with reference to the accompanying drawings, in which:
Referring to
The supporting frame unit 2 includes a mounting portion 21 defining a vertical mounting hole 22, and a positioning portion 23 extending laterally from the mounting portion 21.
The positioning portion 23 has a downwardly facing horizontal abutment surface 26 disposed at a bottom side thereof, a receiving groove 27 formed in the abutment surface 26, an upper shell 24, and a lower shell 25 connected to the upper shell 24. The lower shell 25 has a base wall 251, two lugs 252 extending upwardly from the base wall 251 and spaced apart from each other, a vertical stop wall 253 extending upwardly from the base wall 251 and located at a side of the lugs 252, two sidewalls 254 extending upwardly from the base wall 251 and located at an opposite side of the lugs 252, a top stop wall 255 connected between the sidewalls 254, and a stop seat 256 connected to the base wall 251. The abutment surface 26 is disposed at a bottom side of the base wall 251. The receiving groove 27 is defined by the lugs 252, the vertical stop wall 253, the sidewalls 254, and the top stop wall 255. The stop seat 256 defines a slide slot 257 in spatial communication with the receiving groove 27.
The driving unit 3 is disposed within the mounting hole 22 in the supporting frame unit 2, and includes a housing 31, a motor 32 disposed within the housing 31, a spindle 33 driven by the motor 32, and a cutter 34 disposed on the spindle 33 for performing a chamfering operation.
The tool assembly 4 includes a connecting member 41 disposed pivotally on the positioning portion 23, a pivot pin 42 for connecting the connecting member 41 pivotally between the lugs 252, a stop member 43 disposed movably in the slide slot 257, a resilient member 44 disposed in the slide slot 257 for biasing the stop member 43, a trimming tool 45 disposed removably on the connecting member 41 and extending along a central axis L, and a cushion ring 46 sleeved on the trimming tool 45. In this embodiment, the connecting member 41 is hollow and cylindrical, the stop member 43 is spherical, and the pivot pin 42 is parallel to and vertically and horizontally misaligned from the slide slot 257, as shown in
The connecting member 41 is sleeved rotatably on the pivot pin 42, and has an insert hole 411. The trimming tool 45 has an insert section 451 sleeved by the cushion ring 46 and inserted removably into the insert hole 411, a tool body 452 connected to the insert section 451, and a grip portion 453 connected to an end of the tool body 452 distal from the insert section 451. In this embodiment, the insert section 451 is formed with an annular groove 457 for receiving the cushion ring 46.
The tool body 452 has a first base surface 454, a second base surface 455 perpendicular to the first base surface 454, and a blade portion 456 disposed between the first and second base surfaces 454, 455. In this embodiment, the central axis L extends through the first and second base surfaces 454, 455. In an alternative embodiment, the first and second base surfaces 454, 455 may be parallel to the central axis L.
With further reference to
As such, the connecting member 41 is rotatable about the pivot pin 42, and is perpendicular to the abutment surface 26 when the tool assembly 4 is at the tool-taking position.
In this embodiment, a bottom surface of the top stop wall 255 has a concaved surface portion 258 (see
During pivoting movement of the connecting member 41, the stop member 43 is confined within the slide slot 257 by the connecting member 41. When the tool assembly 4 is at the tool-concealing position or the tool-taking position, the stop member 43 is biased by the resilient member 44 to press against the connecting member 41 at a position misaligned from the rotating axis of the connecting member 41, so as to maintain the position of the connecting member 41.
To chamfer an edge band 500 adhered to a workpiece 501, the tool assembly 4 is first converted into the tool-concealing position. Next, the abutment surface 26 is bright into contact with the top surface 502 of the workpiece 501. Hence, the cutter 34 can be moved to perform a chamfering operation on the top side of the edge band 500.
With particular reference to
It should be noted that, if the connecting member 41, the pivot pin 42, and the lugs 252 are sized to create a sufficient friction, the stop member 43, the resilient member 44, and the stop seat 255 can be omitted.
In view of the above, due to disposition of the tool assembly 4 within the receiving groove 27, if necessary, the trimming tool 45 can be removed from the receiving groove 27 for use in a chamfering operation. As a consequence, the applicable range of the edge-band chamfering machine of this invention can be increased effectively. Thus, the object of this invention can be achieved.
With this invention thus explained, it is apparent that numerous modifications and variations can be made without departing from the scope and spirit of this invention. It is therefore intended that this invention be limited only as indicated by the appended claims.
