GRINDER EQUIPPED WITH A CURVED MOTION MECHANISM
A grinder equipped with a curved motion mechanism to process a working piece to form a double-envelope structure includes a grinding wheel, a driving shaft, a track bracket and a holder. The grinding wheel includes a grinding edge which has a grinding zone in contact with the working piece. The driving shaft drives the grinding wheel spinning. The track bracket holds the driving shaft and is movable in a curved motion against the holder. The driving shaft is coupled with the track bracket via a middle section and driven by the curved motion to tilt against the holder and oscillate about the grinding zone of the grinding wheel as an oscillation center. Thus the invention can process the working piece at varying angles to form a worm with the double-envelope structure and improve process precision.
The present invention relates to a machining grinder and particularly to a machining grinder equipped with a curved motion mechanism.
BACKGROUND OF THE INVENTIONMachining processes usually rely on a machining grinder to process various types machining tools such as gears, worms, drills, milling cutters, hobbing cutters and the like. Such a machining grinder mainly includes a cutting power mechanism, a cutting position adjustment mechanism and a feeding mechanism for an intended working piece. For processing the worms the commonly adopted approach is turning with a cutter.
U.S. patent application No. 20090241712 discloses a worm processing manner. It mainly clamps a working piece in a chuck first; next, forms an intended shaping portion at one end of the working piece by turning; then processes a primary helical teeth section on the intended shaping portion via two opposing shape-forming wheels; then clamps the working piece in a chuck and performs precise machining on the helical teeth section via a hobbing cutter inclined at 15 degrees against the axis of the working piece; the hobbing cutter and the working piece are spun at the same speed ratio, and the axes of the hobbing cutter and working piece are maintained at a constant distance to finish the product.
While processing the worm by turning can make the finished product in one process at a faster speed to facilitate mass production, there is still room for improvement in terms of precision.
SUMMARY OF THE INVENTIONThe primary object of the present invention is to solve the problem of the conventional technique that processes the worms by turning and results in deficiency in precision.
To achieve the foregoing object the present invention provides a grinder equipped with a curved motion mechanism to process a working piece to form a double-envelope structure. The grinder of the invention includes a grinding wheel, a driving shaft, a track bracket and a holder. The grinding wheel includes a grinding edge which has a grinding zone in contact with the working piece. The driving shaft drives the grinding wheel spinning and has a fastening end connecting to the grinding wheel, a free end remote from the fastening end and a middle section between the fastening end and free end. The track bracket holds the driving shaft and is movable in a curved motion against the holder. The driving shaft is coupled with the track bracket via the middle section and driven by the curved motion and tilts against the holder to oscillate about the grinding zone of the grinding wheel as an oscillation center.
Through the curved motion of the track bracket against the holder the driving shaft is driven in the oscillation to process the working piece on the grinding zone at varying angles. Thus a worm can be formed with the double-envelope structure, and a multi-angle grinding process also is formed to improve process precision
The foregoing, as well as additional objects, features and advantages of the invention will be more readily apparent from the following detailed description, which proceeds with reference to the accompanying drawings.
Please refer to
Referring to
Referring to
Please refer to
As a conclusion, the invention, through the curved motion of the track bracket against the holder, can drive the driving shaft in oscillation to perform process on the working piece via the grinding zone at different angles to form a worm with the double-envelope structure. In addition, grinding precision improves. Moreover, with the rotary seat hinged on the holder, the grinding zone not only can oscillate horizontally at varying angles, also can swivel vertically increase angle alterations to achieve multi-angle grinding effect, thus is adaptable for grinding of diversified working pieces. It provides significant improvement over the conventional techniques.
While the preferred embodiment of the invention has been set forth for the purpose of disclosure, modifications of the disclosed embodiment of the invention as well as other embodiments thereof may occur to those skilled in the art. Accordingly, the appended claims are intended to cover all embodiments which do not depart from the spirit and scope of the invention.
Claims
1. A grinder equipped with a curved motion mechanism to process a working piece to form a double-envelope structure, comprising:
- a grinding wheel contained a grinding edge which includes a grinding zone in contact with the working piece,
- a driving shaft which drives the grinding wheel spinning and includes a fastening end connecting to the grinding wheel, a free end remote from the fastening end and a middle section between the fastening end and the free end; and
- a holder and a track bracket which holds the driving shaft and forms a curved motion against the holder;
- wherein the driving shaft is coupled with the track bracket via the middle section and driven by the curved motion to tilt against the holder and oscillate about the grinding zone as an oscillation center.
2. The grinder equipped with a curved motion mechanism of claim 1, wherein the track bracket includes an indented upper curved track and an indented lower curved track opposing the upper curved track, the holder including an upper latch and a lower latch to latch respectively the upper curved track and the lower curved track.
3. The grinder equipped with a curved motion mechanism of claim 1 further including a rotary seat located at one side of the holder remote from the track bracket and hinged on the holder to swivel against the holder.
4. The grinder equipped with a curved motion mechanism of claim 2, wherein the track bracket includes an elongate gear racked on the upper curved track, the holder including a transmission gear to engage with the gear rack.
5. The grinder equipped with a curved motion mechanism of claim 4, wherein the transmission gear is coupled with a motor.
6. The grinder equipped with a curved motion mechanism of claim 1, wherein the driving shaft includes a spinning axis, the oscillation center being on the grinding zone and extended to form an oscillation axis perpendicular to the spinning axis.
Type: Application
Filed: Mar 6, 2012
Publication Date: Sep 12, 2013
Inventors: Shi-Duang CHEN (Hsinchu City), Tay-Cheng Kuo (Hsinchu City)
Application Number: 13/413,047
International Classification: B24B 41/00 (20060101); B24B 47/00 (20060101);