JPS6137494Y2 - - Google Patents

Description

[Detailed description of the invention] This invention rotates the processing tank loaded with the workpiece and media in an eccentric and inclined state to create a tornado-like fluid circulation in the mass, and when processing the workpiece,
The present invention relates to a tornado fluid finishing device characterized by further increasing the fluid motion of the mass through the effect of a spring, thereby improving machining efficiency and further stabilizing the performance of the device.

Conventional barrel finishing methods are broadly classified into three types: rotating barrel finishing, vibrating barrel finishing, and centrifugal barrel finishing. Although the rotating barrel finishing method provides extremely good surface roughness of polished workpieces, it has the disadvantage that it requires a large amount of polishing time. In addition, although the vibrating barrel finishing method is easy to automate and has several times the polishing power compared to the rotating barrel finishing method, it has the disadvantage of requiring a large amount of polishing time when dry polishing small parts, just like the rotating barrel finishing method. . The polishing efficiency of the centrifugal barrel finishing method is several tens of times higher than that of the rotating barrel finishing method, but there are problems such as it takes a lot of time and effort to attach and remove the lid, automation is extremely difficult, and heavy work is required. There was a risk that dents would occur when polishing objects.

However, as shown in Fig. 1, this invention makes the barrel tank 1 eccentric by a distance l with respect to the vertical main axis A, and also tilts it by θ degrees so that the upper side faces inward.
Moreover, a tornado flow finishing device is provided on the substrate in which each point of the barrel tank always maintains the same direction, that is, rotates at high speed on the same self-trajectory around the vertical main axis A without rotating with respect to space. The substrate is suspended on a spring, and the material charged in the barrel tank (mixture of workpiece and media, hereinafter collectively referred to as mass) circulates in a tornado-like manner to polish the workpiece. Therefore, the polishing efficiency is so great that it surpasses the centrifugal barrel finishing method, and since the barrel tank is always tilted inward and rotated, the mass does not protrude outside, making it possible to simplify or omit the lid. And so. In addition, the spring absorbs the friction of the eccentric rotation mechanism in the device on the spring, giving the device more stability, improving the overall safety of the device, doubling the durability, etc. We succeeded in creating a completely new barrel finishing device that solved all problems.

An embodiment of this invention will now be described with reference to FIGS. 2 and 3. That is, the coil springs 2 are arranged on the same circumference on the base 12, and the substrate 8 is suspended thereon so as to be able to vibrate. The rotating body 6 is attached to the bearing 1 on the support shaft 13 fixed vertically onto the center of the substrate 8.
The belt 5 is mounted between a belt groove provided on the outer peripheral wall of the rotating body 6 and the pulley 4 of the electric motor 3, and the rotating body 6 is rotated. An adjusting disc 7 for adjusting the eccentric distance l and the inclination angle θ is screwed onto the rotating body 6, and the axis B of the adjusting disc 7 intersects the axis A of the rotating body 6 above. It is arranged like this. Further, a barrel case 9 to which the barrel tank 1 is attached is supported on the adjustment disc 7 via a bearing 15, and the lower end of the barrel tank 1 is fitted and fixed to the barrel case 9. In the embodiments shown in FIGS. 2 and 3, the axis of the barrel case 9, in other words, the central axis C of the barrel tank 1 is the axis A of the rotating body 6 when the adjustment disc 7 is at a predetermined position. It is set so that it can match. A screw 16 is horizontally screwed into the outer wall of the rotating body 6, and the tip of the screw 16 presses and locks the outer peripheral surface of the adjusting disc 7. The barrel tank 1 (a barrel case may also be used) is connected at one end to the other end of a spring 11 attached to a support 10 planted on the base plate 8, so that even when the rotating body 6 is rotated, Due to the tension of the spring 11, the shaft of the barrel case 9 idles within the bearing of the adjustment disc 7. Therefore, even if the rotating body 6 is rotated, the barrel tank 1 does not rotate relative to the space. The shape of the barrel tank 1 is not only cylindrical as shown in FIGS. 1 and 2, but also prismatic 1a as shown in FIGS. 4 to 9.
Various shapes can be used, such as truncated conical shapes 1b and 1c, bottle shapes 1d and 1e, and spherical shapes 1f. Since the barrel tank shown in FIGS. 5 to 9 is constricted at the top, the floating movement of the upper floating layer of the mass in the barrel tank can be suppressed, which has the advantage of improving polishing efficiency.

In addition, the amount of mass charged in this invention is 40 to 60% of the volume of the barrel tank, and optimally 50%. Therefore, when processing a mass smaller than 50% of the volume of the barrel tank, a device that can create a partition wall or a lid inside the barrel tank so that the total mass becomes 50% and the mass space becomes 50% is necessary. It is effective to use

The operation of this embodiment will be explained based on the above structure. That is, when the central axis C of the barrel tank 1 and the axis A of the rotating body 6 coincide as shown in FIGS. 2 and 3, the eccentricity distance is 0 and the inclination angle is also 0. Even if the rotating body 6 is rotated in this state, the workpiece will not be polished at all. Therefore, when the adjusting disk 7 is rotated about the axis B, the barrel tank 1 becomes eccentric and tilted as shown in FIG. In this example, the eccentricity distance l
The structure is such that as the angle of inclination θ increases, the angle of inclination θ also increases. It is preferable that the eccentric distance l is set to 15% to 85% of the maximum radius of the barrel tank, and the inclination angle θ is selected from a range of 1 degree to 15 degrees. Set the barrel tank 1 to an arbitrary eccentric distance l and inclination angle θ,
After fixing the adjusting disk 7 to the rotating body 6 with the screws 16, charge a predetermined amount of mass into the barrel tank and turn the motor 3.
is driven to rotate the rotating body 6. This rotation speed is preferably selected from a range of 800 rpm to 1700 rpm. Due to the rotation of the rotating body 6, the barrel tank 1 is rotated around the axis A without rotating relative to the space, so that the mass repeats fluid circulation in a tornado shape as shown in Fig. 10, and the workpiece is polished by the media. Ru. Furthermore, the action of the coil spring 2 that suspends the substrate 8 can further enhance the polishing effect and also stabilize the installation of the tornado flow finishing device. Once polishing is complete, motor 3
is stopped, the barrel tank 1 is removed from the barrel case 9, the mass is discharged to a sorter, etc., and only the processed workpieces are taken out, and one process is completed.

As mentioned above, this idea surpasses the centrifugal barrel finishing method by making the barrel tank loaded with workpieces and media eccentric and tilting it inward, allowing it to rotate at high speed without rotating in space. We were able to obtain better polishing ability and a more precise surface roughness. Further, the action of the spring can further enhance the polishing effect, and has the advantage of increasing the stability of the installed device.

[Brief explanation of drawings]

Fig. 1 is a front view of an embodiment of this invention, Fig. 2 is a vertical cross-sectional front view, Fig. 3 is a cross-sectional plan view taken along line X-X in Fig. 2, and Figs. This figure is a perspective view showing another example of the barrel tank used for carrying out this invention, and FIG. 10 is a diagram showing the flow state of the mass in the barrel tank. 1... Barrel tank, 2... Coil spring, 3
...Electric motor, 4...Pulley, 5...Belt, 6
...Rotating body, 7...Adjustment disk, 8...Substrate, 9...
... Barrel case, 10 ... Support column, 11 ... Spring, 12 ... Base, 13 ... Support shaft, 14 ...
Bearing, 15...Bearing, 16...Screw.

Claims (1)

[Claims for Utility Model Registration] 1. A rotating body is horizontally rotatably installed on a substrate suspended on a plurality of springs, and the upper extension line of the central axis of the barrel tank is aligned with the central axis of the rotating body. The barrel tank is rotatably mounted so as to intersect at an acute angle above the rotating body, and the barrel tank is installed so that the barrel tank always maintains the same direction without rotating with respect to space. A tornado flow finishing device, characterized in that one point of the above is pasted on the substrate. 2. The springs are coil springs, and the suspended state of the board is such that the springs are arranged at regular intervals on the same circumference centered on the central axis of the rotating body on the bottom surface of the board, with the center of the spring being vertical. The tornado finishing device according to item 1.