JPH01153260A - Device for polishing surface of metal rod - Google Patents

Abstract

PURPOSE:To remove completely flaws, dirt, etc., from the surface of a metal rod by causing the metal rod to contact a brush of a polishing body on both ends and bends of said rod while the metal rod is moved through the polishing body so that the whole surface of metal rod is polished irrespective of the size of rod diameter during the passage through the polishing body. CONSTITUTION:A relative angle between a pair of arms of a polishing body rotational drive device is adjusted to bend the polishing body 2 held by a tubular holder on the central portion according to the diameter of a metal rod 1 to be polished. Then, while the polishing body 2 is rotated through the tubular holder, the metal rod 1 is shifted longitudinally toward one end opening 2a or the other end opening 2b of polishing body 2. During the shift, the metal rod 1 contacts brushes 7 located on the inside gaps of central bend 2c and both ends 2a, 2b of polishing body 2, so that the whole surface of metal rod is polished uniformly irrespective of the size of metal rod 1 diameter to remove securely flaws, rust, dust, etc., from the surface.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a surface polishing device for metal bars that removes scratches, rust, dust, etc. from the surface of metal bars and polishes them.

(Prior Art) Generally, when drawing a metal bar using dust, first sand particles are applied to the bar by shot blasting to remove rust, dirt, etc. from the surface, and then dust is passed through the bar, followed by polishing with a grinder.

However, even with a grinder, small scratches may remain on the surface of the bar, and fine sand grains that cannot be removed from the surface of the bar during the shot blasting process and adhere to the surface of the bar are transferred to the surface of the bar as it passes through the dust. This type of material cannot be treated with a grinder, so the final step is to have the inspector re-inspect it and polish it with sandpaper to finish the product.

However, the scratches and rust on the surface of the metal bar polished during the above final inspection are extremely minute and difficult for normal humans to visually recognize, and the diameter of the metal bar varies depending on its use. It is extremely difficult to mechanize the final polishing because of the complexity of the adjustment mechanism to accommodate different bar types. Therefore, at present, the inspection must be carried out manually by skilled inspectors.

(Technical Problem of the Invention) The present invention solves the above-mentioned drawbacks and provides a surface polishing device for a metal bar that can always easily and reliably polish the surface of the metal bar regardless of its diameter. The technical challenge is to do so.

(Means for Solving the Problems) In order to solve the above problems, a surface polishing device for a metal bar according to the present invention includes a polishing body formed in a coil shape and provided with a brush inside at least part of the polishing body. and rotating the metal bar in a curved manner, and moving the metal bar in its longitudinal direction from an opening at one end of the polishing body toward an opening at the other end, so that the surface of the metal bar comes into contact with the brush of the polishing body. It is characterized by

(Operations and Effects of the Invention) Since the present invention is configured as described above, when the metal rod is inserted from the opening at one end of the polishing body to the opening at the other end,
Its surface contacts the ends of the polishing body and the brush located in the inner gap of the curved portion. Therefore, while rotating the polishing body, the metal rod is moved in the longitudinal direction from the opening at one end of the polishing body toward the opening at the other end. As the metal rod comes into contact with the brush at both ends and the curved part while moving through the polishing body, its entire surface is polished as it passes through the polishing body, and scratches, rust, dirt, etc. on the surface are reliably removed. be done.

Furthermore, since differences in the diameters of the rods can be accommodated by changing the degree of curvature of the abrasive body, the adjustment mechanism is extremely simple, and even if the brush wears out, it can be accommodated with the same adjustment. Therefore, the efficiency of surface polishing of metal rods can be greatly improved with a simple structure.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

In the figure, reference numeral A indicates a polishing apparatus for a metal rod l. This surface polishing apparatus A is composed of a polishing body rotation drive device 3 for rotating a polishing body 2, and a metal bar moving device.

As shown in FIGS. 1 and 2 (at (b)), the polishing body 2 is attached along one surface with a strip 6 having a U-shaped cross section, with the grooves 5 facing inside. The metal brush 7 is fixed to the groove, and is attached to the polishing body rotation drive device 3.

The polishing body rotation drive device 3 has cylindrical holding members 8 and 9 disposed at both ends, and a pulley l integrally attached to one cylindrical holding member 8.
This pulley lO and electric motor 1
The polishing body 2 is connected to a pulley 13 provided on a rotating shaft 12 by a belt 14, and both ends of the polishing body 2 are held inside the cylindrical holding members 8 and 9, respectively.

Said cylindrical holding element 8.9 is supported by a support element 15.16. Each support member 15.1'6 is pivotally supported on the base frame 9 by a support shaft 17.18 perpendicular to the center line of the cylindrical holding member 8.9. In addition, each of the above-mentioned support shafts 17.18
Arms 20 and 21 are provided protrudingly, and these arms 20 and 21
．． The ends of 21 are overlapped and connected by a connecting shaft 22. Furthermore, the connecting shaft 22 has a rotary operation handle 2.
An adjustment shaft 24 having a diameter of 3 is screwed together. Further, the support shaft 17 of the cylindrical holding member 8 is provided with a pedestal 2 of the electric motor 11.
5 is fixed.

Therefore, together with the rotary operation handle 23, the adjustment shaft 24
By rotating the connecting shaft 22, the connecting shaft 22 moves in the front and back directions in FIG. The orientation of the holding member 8.9 changes. For this reason,
The polishing body 2 held in the holding member 8.9 is also curved in the middle. Therefore, as shown in FIG. 3, the size of the inner gap between both ends of the polishing body 2 and the central curved portion can be variably adjusted depending on the degree of curvature of the polishing body 2. The curved portion is maintained in a curved state by appropriate means.

Incidentally, since the direction of the pedestal 25 changes at the same time as the angle of the arm 20 changes, the direction of the electric motor 11 also changes, and the center of its rotation axis also corresponds to the change in the direction of the cylindrical holding member 8.9.

The metal rod moving device may be any device that moves the metal rod l to be inspected in the elongated direction from the opening at one end of the polishing body 2 of the polishing body rotation drive device 3 toward the opening at the other end. do not.

Next, how the polishing apparatus A having the above configuration is used will be explained.

First, as described above, by adjusting the angle of the arms 20, 21 of the polishing body rotation device 3, the degree of curvature of the polishing body 2 is adjusted in accordance with the diameter of the metal bar l to be polished. As shown in FIG. 4, this degree of curvature is such that when the metal bar 1 is passed from one end opening 2a of the polishing body 2 to the other end opening 2b, the surface of the metal bar 1 is formed between both ends of the polishing body 2 and the central curved part. 2
Adjust so that it contacts the brush 7 located in the inner gap of c.

Next, the polishing body rotation drive device 3 and the bar moving device are operated to rotate the cylindrical holding member 8.9 and the metal bar material l.
is moved in the longitudinal direction from the opening at one end of the polishing body 2 toward the opening at the other end. As a result, the metal bar l comes into contact with the brush 7 at three locations a, b, and c, so that its entire surface is polished while passing through the polishing body 2, ensuring that there are no scratches, rust, dirt, etc. on the surface. will be removed.

As mentioned above, according to the surface polishing apparatus A for the metal bar 1, differences in the diameter of the bar 1 can be accommodated by changing the degree of curvature of the polishing body 2, so the adjustment mechanism is very simple. This is simple, and even if the brush 7 wears out, it can be handled with the same adjustment. Therefore, the efficiency of surface polishing of the metal rod l can be greatly improved with a simple structure.

Note that the curve of the polishing body 2 is not limited to one location, but may be configured to curve at two or more locations.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the surface polishing apparatus for metal bars according to the present invention, FIG. 2 (al (b) is a side view of the band-shaped body and a front view of the polishing body, and FIG. FIG. 4 is a front view in a curved state, and FIG. 4 is a diagram illustrating the principle of polishing by the polishing apparatus.

Claims (1)

[Claims] A polishing body formed in a coil shape and provided with a brush inside the polishing body is rotated with at least a portion thereof curved, and a metal rod is moved along its longitudinal direction from an opening at one end of the polishing body to an opening at the other end. A surface polishing device for a metal bar, characterized in that the surface of the metal bar is brought into contact with a brush of the polishing body by moving the metal bar in a direction.