Vibrating cutting tool

The easy-to-use and comfortable design enables convenient function for the completion of quick tasks. From ordinary tools for household use to large ones, vibrating cutting tool are available at industry-leading prices and promise optimal performance. With many suppliers worldwide, Alibaba. Each product is designed for a particular purpose and exhibits superior performance.

A comprehensive catalog with detailed information on each product is available for shoppers. It also offers the option of choosing the products' materials. Supplier Types. Product Types. Ready to Ship. Suggestions Japan 1. Pakistan Taiwan, China 1. Turkey 1. To start cutting operation, the input shaft secured to the live spindle of a machine tool is rotated and moved forward together with the live spindle to press the cutter fixedly mounted on the cutter mounting shaft of the output shaft against the work.

In the above cutting process, irregular microscopic vibration is produced at the cutter edge due to fluctuations in the cutting force. In case of a prior art cutting tool in which the input and output shafts are integral with each other, such vibration at the cutter edge is extremely irregular as represented by the amplitude fluctuation curve shown in FIG.

In contrast, according to this invention, in which the input shaft and the output shaft are movable relative to each other within a predetermined limited range, the amplitude is smoothed out as shown in FIG.

In FIGS. When the cutter cuts into the work, the turning torque is transmitted from the input shaft to the output shaft through the moving elements pressed against the recesses in the input shaft by the springs. While the fluctuation of the cutting force is small, the torsional rigidity for torque transmission is small because it is determined mainly by the springs. Thus, the cutter edge can vibrate relatively freely and the amplitude of vibration is large compared with a conventional integral type cutting tool.

When the fluctuation of cutting force grows and thus the springs are compressed to a greater extent, the moving elements displace until they abut the stoppers. Now the output shaft is rotated directly by the input shaft irrespective of the springs. Thus, the torsional rigidity between the input shaft and the output shaft increases to a value near to the value obtained with a conventional integral type cutting tool, thus suppressing the amplitude of vibration at the cutter edge.

The amplitude of vibration at the cutter edge is kept large where it is small with a conventional integral type cutting tool and kept small where it is large with a conventional tool. As a result, the amplitude of vibration is smoothed out as a whole as shown in FIG. According to this invention, the input shaft and the output shaft are circumferentially movably coupled together.

Moving elements are mounted between the recesses formed in one of the input and output shafts and the holes formed in the other. The turning torque is transmitted by urging the moving elements against the recesses with the springs.

The movement of the moving elements is restricted only in a circumferential direction and a direction in which the springs are compressed within a predetermined range.

In this arrangement, among the irregular vibrations produced at the cutter edge of a conventional integral type cutting tool, any part where the amplitude is small grows large, since at this part the torsional rigidity for torque transmission between the input shaft and the output shaft is determined mainly by the springs.

Thus, the vibration at the cutter edge is not restricted so much and thus kept large. In contrast, at parts where the amplitude is large, the amplitude at the cutter edge is suppressed since the movement of the moving elements is restricted and thus the torsional rigidity between the input shaft and the output shaft increases.

As a result, the amplitude at the cutter edge is smoothed out as a whole. This also makes it possible to reduce fluctuations in the cutting force. Thus, the feed speed and the number of revolution during cutting can be increased compared with a conventional integral type cutting tool. This contributes to increased productivity, better finished surface roughness of the work after cutting and long life of the tool.

Further, as compared with a cutting tool which utilizes a forcible vibration source, no complicated, large-sized and expensive device is necessary. Its appearance is not different from a prior art integral type cutting tool. Thus, adjustment and handling are easy.

It also has various other advantages including the advantage that it can be used within a large range of vibration frequency. Other features and objects of the present invention will become apparent from the following description taken with reference to the accompanying drawings, in which:. In the embodiment shown in FIGS. The input shaft 1 has a straight shank portion 3 at the rear part thereof and is integrally formed with a flange 4 at the front part thereof.

The input shaft 1 has a center bore 5 in which a small-diameter shank 6 provided at the rear of the output shaft 2 is rotatably mounted. The shank 6 is provided at the rear end thereof with a stepped small-diameter portion 7. A protrusion 9 is formed on the inner peripheral surface of the center bore 5 at an intermediate portion thereof.

A thrust bearing 10 is mounted outside the protrusion 9. A stop bolt 11 is provided at the rear end thereof with a large-diameter head which is supported on the thrust bearing The bolt 11 rotatably extends through the protrusion 9 and is threaded into a small-diameter shank 6.

A plurality of steel balls 13 are mounted between the small-diameter stepped portion 7 and the front side of the protrusion 9. As shown in FIGS. Further, the flange 4 is formed in the front inner side thereof with an annular recess 17 extending over the entire circumference thereof.

A plurality of steel balls 20 are arranged in the recess 17 on a protrusion 19 formed on a rear end face of a large-diameter portion 16 of the output shaft 2 at the inner part thereof. The through holes 21 and the threaded holes 22 correspond to the recesses 15 formed in the flange 4. The threaded holes 22 are provided at the rate of one for a plurality of through holes A moving element 23 in the form of a steel ball is fitted in each of the through holes 21 and the threaded holes 22 at the rear end thereof.

The moving elements 23 are partially engaged in the recesses 15 of the flange 4. A spring 26 is mounted in each hole 21 while a setscrew 27 as a stopper means is threaded in each threaded hole A tiny gap is defined between the rear end of the setscrew 27 and each moving element The gap can be adjusted by adjusting the position of the setscrew Further, a setscrew 30 having a roller pin 29 is threaded into the front end of each threaded hole The pins 29 protrude toward the front surface of the large-diameter portion A ring 31 is slidably fitted on the front side of the large-diameter portion 16 of the output shaft 2.

We gathered eight machines, six corded and two cordless, that represent a cross section of this industry, with all major brands represented. We tested their power by cutting hardwood, softwood, and wood with nails embedded in it. We looked at whether it was easy to mount and dismount blades and accessories, and how comfortable the tools are to use, particularly in tough cuts that can be tiring, such as into the nail-embedded wood. Likes: This is clearly a pro-duty tool, and the price reflects it.

The Fein does more work per amp—and does it more smoothly—than any other tool in this category. It cuts and sands with almost no vibration, and accessories snap on and off in seconds. Likes: We tested the predecessor to this tool the MM45 and were impressed with its power and its value.

We expect good things of the MM50, which has two key improvements. It features a slightly shorter nose measured from a blade to the top of the housing and a new angled motor-body configuration. The offset allows better access when flush cutting a door trim and jamb when you install flooring or when you need to cut into a tight corner.

Otherwise, the tool has the same great five-amp motor of the previous tool, and it comes with 30 accessories, such as a variety of blades, sandpaper, and mounting pads. Likes: This powerful saw excelled in long cuts, drop cuts, and the embedded-nail test. It sands as well as a dedicated sander, and the snap-on accessories are, well, a snap to use. Dislikes: Expensive. The included saw blades are longer and work most effectively on long straight cuts, though they are more difficult to control than the blades that come with the other tools.

We also liked its dial speed control numbered 1 through 12 , which is extremely precise. That extra level of precision could be a help to somebody like a kitchen cabinet installer or a cabinetmaker, say.

Note that we show it above equipped with a battery. The Amazon link and price is for the bare tool.