JPS62140759A - Drum for barrel polishing machine - Google Patents

Abstract

PURPOSE:To perform polishing with no unevenness in a short time, by providing both end surfaces of a drum tilting with respect to a main spindle so as to allow chips to flow in a circumferential direction and an axial center direction. CONSTITUTION:Both end surfaces 2 are mounted to be stopped to main spindles 3, 3 having a fixed tilt angle theta with respect to the center axis Z-Z of a drum. If the drum of such constitution rotates, the drum, generating unbalance in a part corresponding to ABC, DEFT, is balanced by weights 5, 6. Because of this constitution, rotation of the drum causes chips and polished materials to generate a flow by their movement in the axial direction in addition to the flow along the circumferential direction. According, the chips and the polished materials can perform polishing providing a predetermined glossy surface in a short time, while the chips and the polished materials, uniformly mixing with each other, enables the polishing with no unevenness to be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a drum configuration of a barrel sander used for cleaning the outer surface of small parts.

(Prior art) There are various types of barrel polishing machines, but the simplest and typical one uses a drum with a polygonal cross section as shown in Figure 4, and the center of the drum is Those that rotate at a constant speed with a shaft as the main axis are often used.

By rotating the drum, the polishing machine lifts the chips (abrasive material) and the material to be polished, which are placed inside the drum, along the inner wall of the drum to a certain height, and then drops them again, resulting in a series of circulations. Relative slippage occurs between the tip and the material to be polished. The principle of the barrel polishing machine is to shorten the polishing time by contacting and sliding between the tip and the material being polished (regardless of whether or not the material being polished is fixed to a support frame). In addition, it is necessary to increase the number of contact stitches between the two (t!
? It is also possible to aim for the direction of =M. In the barrel polishing machine shown in FIG. 5, in order to impart a large amount of momentum to the chips, a drum is mounted at a constant distance from a drive shaft and rotates at high speed around the drive shaft. Furthermore, there is also known a device as shown in FIG. 6, which has features in the manner in which the drum is attached to the drive shaft. The drum of this barrel sander is installed at a predetermined angle of intersection, with the drive shaft of the drum not aligned with the center axis of the drum. This polishing machine was developed for the purpose of uniform (no unevenness) polishing by creating an original flow that allows the chips and the material to be polished to mix well.

In this way, regardless of the type of barrel polisher, the flow speed and path of the chips are very important in order to finish the material to be polished with a glossy surface of a certain level or higher within a short period of time. By the way, among such a variety of barrel polishing machines for various uses, the one to which the present invention is directed shares the same purpose as the model shown in Fig. 6. In order to flow in the axial direction, if the rotary drive shaft is installed intersecting the central axis, it is not easy to determine the position of the drive shaft, and the balance between the left and right end surfaces becomes unbalanced7.
In addition to producing i(ff), it is not easy to install such a barrel in a centrifugal high-speed barrel polishing machine with the central axis of the drum intersecting with the rotating axis. There is no evidence that it was ever used.

(Problems to be Solved by the Invention) In this way, by mounting the rotating shaft so as to intersect with the central axis of the drum, the damage caused by chips from the four rotations of the drum can be avoided in the axial direction of the drum. In a barrel polishing machine that generates a large amount of force, not only is it not easy to attach the drive shaft, but also a large bending moment (couple) is generated on the drive shaft. On the other hand, in recent years, as the use of centrifugal high-speed barrel sanders has been increasing, the flow of chips generated in the drum of these high-speed barrel sanders is also biased only in the radial direction, and sometimes the chips and the material being polished are The present invention is a drum for a barrel polishing machine developed to solve these problems.It rotates at high speed and causes chips to flow in the axial direction of the drum, thereby separating the chips and the polished object. This allows the materials to be mixed uniformly and polished without any unevenness.

(Means for Solving the Problems) Since the drum of the present invention causes chips to flow in the direction of the drum axis as it rotates, both end surfaces of the drum are not perpendicular to the central axis but are formed with a constant inclination. . Of course,
The inclined portion may be formed over the entire end surface or in a portion thereof, and when the chips hit the inclined surface, a flow is generated in the axial direction of the drum. Although the mass balance at each point of the drive shaft will be slightly disrupted by providing such an inclined section, the unbalance of only the drum end surfaces will be much smaller than when the entire drum is installed at an angle. Therefore, it is possible to easily deal with this by providing a balancer. Here, a polishing machine for attaching such a drum is most suitable not only for the conventional type shown in FIG. 4 but also for a centrifugal type high-speed barrel polishing machine as shown in FIG. 5.

Embodiments of the present invention will be described in detail below with reference to the drawings.

(Example) FIGS. 1a and 1b show one form of a drum according to the present invention, in which the outer surface 1 has a hexagonal shape, and the end surface 2 is aligned with respect to the central axis (Z-Z) of the drum. It is not vertical but has a constant inclination angle θ. Main shafts 3, 3 to be attached to the main body of the machine are fixed to the end face 2, and serve as a rotating shaft of the drum. Here, the outer surface l forming the record 8 is the individual side plate 4.
It may be formed by joining two pieces together, or it may be formed into an integral molded body, and the material thereof is not limited in the present invention even if it is made of wood or steel.

Although a detailed explanation is omitted, a lid is formed on a part of the outer surface 1 or the end surface 2 for taking in and out the chips and the material to be polished. By the way, when rotating a drum with such an inclined end surface 2 around the main shaft 3, ABC
The portions corresponding to
．． By fixing 6, the centrifugal force can be balanced.

On the other hand, FIGS. 2a and 2b show another embodiment of the wooden block, in which the outer surface 1 is not polygonal but circular. The end surface 2 is not sloped over the entire area as shown in FIG. 1, but only the end surface 2a is sloped, and the end surface 2b is provided perpendicular to the central axis. The drum does not have a main shaft 3 and is intended for use in a centrifugal high-speed barrel polisher.

By the way, if such a drum is attached and the drum actually rotates, it goes without saying that the chips and the material to be polished will flow along the circumferential direction, but if the drum rotates in the direction a+b in Fig. 3, The area of abed becomes efg,
The tip located at the abcd will inevitably be moved in the axial direction. Although both end faces do not necessarily have to be formed in parallel, they are generally arranged side by side, which causes a left and right flow in the axial direction of the drum as it rotates. It also provides axial flow even when applied to high-speed barrel sanders. That is, the chips flowing in a radial outward direction due to centrifugal force collide with the inclined end face and the flow direction is changed to the opposite direction of the drum.

Although the drum for a barrel sander according to the present invention is not limited to the embodiments described below, it is possible to obtain the following effects.

(Effects) (1) The drum according to the present invention has a rotation center axis on the center axis of the drum, and simply forms sloped portions on both end surfaces 2, 2, so that the chips are moved in the circumferential direction by the rotation of the ram. By adding an axial flow to the flow, it is possible to polish a surface with a desired gloss in a shorter time, and the chip and the material to be polished are evenly mixed, resulting in uniform polishing. It can be performed.

(2) The drive shaft can be attached to the center axis of the drum as in the barrel polishing device of the type shown in Fig. 4, compared to the conventional case where the drive shaft and the center axis intersect. It is easy to balance the weight against the drive shaft and is convenient for manufacturing.

(3) In particular, the drum according to the present invention can be fixed as it is to the drum mounting case of a centrifugal high-speed barrel polisher without attaching the main shaft 3 to the end surface, and the chip flow within the drum can be controlled in the radial direction. It can be applied not only in the axial direction, but also in the axial direction, and polishing without deviation can be performed in a short time.

[Brief explanation of drawings]

Figures 1 a and b show one embodiment of the drum for a Hale sanding machine according to the present invention, a is a front IN including a cross section, b is a side view, and Figures 2 a and b are other embodiments. Similarly, a is a front view including a cross section, b is a side view, and FIG. 3 shows the flow state TE of chips using the drum.
Fig. 6 shows an outline of a conventional/Herel sanding machine, respectively. ■...Outer surface 2...End face 3...
・Main shaft 4...Side plate 56...Weight 7...Inner surface 0...Inclination angle 6 (α) Fig. 1 (b) Fig. 20 (b)

Claims (4)

[Claims] (1) A drum for a barrel sander having a rotation center on the central axis of the drum, characterized in that both end surfaces of the drum are inclined with respect to the main axis. (2) The drum for a barrel sander according to claim 1, wherein a part of the end face is inclined. (3) The drum for a barrel sander according to claim 1, wherein the entire end face is sloped uniformly. (4) The drum for a barrel polishing machine according to claim 1, 2, or 3, wherein a weight is attached as a balancer to the inclined portion.