JPS60155352A - Polisher for t-shaped work - Google Patents

Abstract

PURPOSE:To automatically polish a corner portion of a T-shaped metal article by providing an arcuate holder for forwardly and reversely rotating the metal article around the polishing point of the corner portion thereof in a plane involving a buff rotating shaft and the T-shaped metal article and imparting rotation around the shaft the forward and reverse rotation around the polishing point to the metal article. CONSTITUTION:A work 17 is rotated in a combined reciprocating manner around a rotating shaft c lying in a plane involving a rotating shaft a of a buff 7 disposed in opposition to a corner portion 18 and the work 17 and around a rotating shaft d extending perpendicular to the plane and passing the center of the arc circumscribed about the top surface of the corner portion 18. Thus, the corner portion 18 of the work 17 is polished through the semicircular portion in the circumferencial direction of the section thereof and through 90 deg. portion in the arc direction along the top surface 18a of the corner portion 18, so that the whole curved surface of the corner portion 18 having a contour of a semicylindrical surface curved in such a manner as to bend a cylindrical shaft into an L-shaped form. Therefore, this permits the process of polishing T-shaped works to be performed efficiently with energy saved and provides conformity of finishing of works.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a polishing device for automatically polishing the curved corner of a workpiece having a T-shaped cylindrical surface shape, such as the surface of a corner of a Ti-shaped water supply fitting. .

Traditionally, this type of workpiece has been polished mainly by hand, which has the drawbacks of lower work efficiency and uneven finish, and also requires the use of complex equipment such as robots and copying mechanisms. In the case of polishing, the cost of the equipment increases and the polishing target is limited to large-sized workpieces.

In view of the above-mentioned drawbacks, an object of the present invention is to be able to appropriately and efficiently polish the corner curved surface of a T-shaped workpiece, and to
To provide a polishing device for a T-shaped workpiece which can simplify the polishing mechanism, and in which the workpiece is parallel to the rotating axis of a polishing puff placed opposite to the corner part of the workpiece so as to be able to be constantly pressed against the corner of the workpiece. A first rotation axis included in the extension plane of the vertical cross-section divided into two equal parts of the workpiece, and a second rotation axis passing through the center of an arc perpendicular to the extended plane of the vertical cross-section divided into two equal parts and circumscribed to the top surface of the corner part. In order to allow compound reciprocating rotation about the respective rotation axes, a sub-holder for supporting the workpiece is attached to the main holder which is pivotally supported for reciprocating rotation about the first rotation axis. The polishing device is attached so as to be rotatable back and forth about the second rotation axis, and the puff is disposed outside the space occupied by the loci of movement of the main holder and the sub-holder, respectively. be.

Next, an embodiment of the present invention will be described with reference to the drawings. In the drawing, 1 is horizontally slidable on the first frame 2 of the polishing machine MK via a pair of left and right slide shafts 6, 3. 4 is a constant pressure cylinder device connected to the base 71 in order to always urge the base 1 forward with air pressure; 5 is a constant pressure cylinder device that is rotatably mounted horizontally on the front end of the base 1 and is driven by a motor 6 of the base 11; A rotatably driven buffing shaft 7 is a disc-shaped puff placed on the tip of the puff shaft 5, and is rotatably driven around a rotation axis a set horizontally, and the rotation locus of the tip of its use surface is The rotation plane that contains is a vertical plane.

Reference numeral 8 denotes a main shaft rotatably mounted horizontally on a second frame 91 disposed obliquely in front of the first frame 2, so that its axis is parallel to the rotation axis a of the puff 70 and included in the same horizontal plane. A tenth clear actuator 10 is installed on the second frame 9 to reciprocate and rotate the main shaft 8 in a predetermined angular range (in this example, it is set to 180°). are connected.

Reference numeral 11 denotes a main holder attached to the front end of the main shaft 8, in which a base piece 11a and both side pieces 11b, 11b are connected in a two-shaped configuration with front and both sides open, and the main holder 80 becomes a rotation axis. It is rotated reciprocally in a range of 180° about the first rotation axis C, and both side pieces 11b are respectively vertically erected at the rotation end.

12 is a bracket 1 attached to the outer surface of the side piece 11b of the main holder 11.
20th-clear actuator, 1
A gear 4 is rotatably supported between both side pieces 11b of the main holder 11, and is connected to the 20th tar actuator 12 via a gear shaft 14a so as to be rotatable in a reciprocating manner.

Reference numeral 15 denotes a sub-holder attached between both side pieces 11b of the main holder 11, which has an arcuate side surface and a substantially ten-shaped cross section, and is provided opposite to the inner surface of each side piece 11b of the main holder 11. It is sandwiched between each pair of rollers 16° 16 so that it can slide in an arc shape in a direction parallel to both side pieces 11b, and arc-shaped tooth portions 15a are formed on the outer surface thereof so as to be able to mesh with the gear 14. The reciprocating rotation of the gear 14 moves the buff 70 within a predetermined angular range C around the second rotation axis d which is orthogonal to the rotation axis a and the first rotation axis C and included in the rotation plane of the puff 7. At the same time, the main holder 11 is rotated back and forth in a revolution around the first rotation axis C, and the secondary The puff 7 is disposed outside the space occupied by the loci of movement of the main holder 11 and the sub-holder 15 during the compound rotational movement of the holder 15.

17, a main pipe 17a and a branch pipe 17b intersect at right angles,
A workpiece having a T-shaped cylindrical surface shape,
The outer corner part 18 is screwed into a mounting screw 15b protruding near the inner end of the sub holder 15 so that it can be pressed against the puff 7, and the first rotation axis C is included in the extended plane of the bisecting vertical cross section that includes the axis j1 of the main pipe 17& and the axis j2 of the branch pipe 17b, and divides the work 17 into two equal parts vertically, and the second It is supported by the sub-holder 15 so that the rotation axis d is perpendicular to the extension plane of the bisecting longitudinal section and coincides with a straight line passing through the center of the circular arc circumscribing the top surface 18a of the corner portion 18, and the sub-holder 15' Based on the compound reciprocating rotation movement of the first rotation axis C, the second
It undergoes compound reciprocating rotation around a rotation axis d over a range of 90 degrees. Due to the compound reciprocating rotational movement of the work 17, the corner portion 18 is formed in a 180° range in the circumferential direction of the cross section, which covers approximately the buff side half-circumference, and in a circular arc direction along the top surface 18a of the corner portion 18, in the circumferential direction. A 90° range from the tube 17 and side edge 18b to the branch tube 17b side edge 18c is entirely polished with the puff 7, and the semi-cylindrical surface is polished. ρP1ssgThe curved surface of the corner portion 18, which has a curved shape such that its cylindrical axis is bent into an L shape, is polished over the entire area. That is, for example, when the workpiece 17 is rotated around the first rotation axis 0 and both axes jl, . As shown in Figures 5-5), as the inclination angle A of the axis j2 of the branch pipe 17b with respect to the rotating plane of the buff 7 increases (Figure 4-A),
~←) and Fig. 5 (a) to (e), the angle of inclination is QQ, respectively.

22.5°, 45°, 67.5°, 9o0), the contact point t between the corner portion 17 and the buff 7 is the main pipe 17
At the same time as the workpiece 17 sequentially moves from the edge 18b on the a side to the edge 18c on the branch pipe 17b side, the workpiece 17 rotates around the first rotation axis C to both sides in each rotation posture of rotation υ about the first rotation axis 0. Because the workpiece 17 rotates by 90', the half circumferential surface of the workpiece 17 on the puff 7 side in the cross section that crosses the rotational plane of the buff 7 is polished in each of the above rotational postures, and the polished area k of the corner portion 17 is sequentially polished. It is expanded so that the entire curved surface of the corner portion 170 can be polished.

Then, in the rotation plane d~ of the buff 7, the second rotation axis d
The intersection point O between the horizontal line passing through and the axis j1 or j2 of the workpiece 9 is 180, with the first rotation axis 0 as the center and the deviation e of the intersection point O with respect to the first rotation axis C as the radius. The workpiece 17 is displaced along an arc-shaped locus of movement, and the top surface of the buff side of the workpiece 17 is displaced in the horizontal and vertical directions, but it is elastically biased toward the first rotation axis C side by the constant pressure cylinder device 4. The buff 7 moves horizontally following the displacement of the workpiece 17, and a constant pressure contact state between the buff 7 and the corner portion 18 is ensured.

Next, the operation and effects of the embodiment having the configuration described below will be explained.

Now, in this example, the work 17 is
The buff 70 is disposed opposite to the rotation axis a so as to be able to be constantly pressed against the first rotation axis C, which is parallel to the rotation axis a and included in the extended plane of the bisected longitudinal section of the work 17, and the first rotation axis C included in the extended plane of the bisected longitudinal section In order to perform compound reciprocating rotation about the second rotation axis d, which is perpendicular to the extension plane and passes through the center of an arc circumscribing the top surface of the corner portion 18, the first rotation axis C is connected to the frame 9. A sub-holder 15 for supporting a workpiece 17 is attached to the main holder 11 which is pivotally supported so as to be rotatable back and forth around a second rotation axis d, and a buff 7 to main holder 1
1 and the sub holder 15 are disposed outside the space respectively occupied by their movement trajectories.

Therefore, the corner portion 18 of the workpiece 17 is polished over half the circumferential surface in the circumferential direction of the cross section, and at the same time is polished over a range of 90° in the arcuate direction along the top surface 18a of the corner portion 18. The entire curved surface of the corner portion 18, which has a cylindrical surface curved so that its cylindrical axis is bent into an L shape, can be effectively polished.

Therefore, the polishing process for T-shaped workpieces can be made more efficient and labor-saving, and the polishing conditions between the workpieces can be balanced, and the polishing mechanism for polishing workpieces of various sizes can be simplified and the equipment can be improved. This has the effect of making it more compact and reducing costs.

In addition, since the buff 7 is elastically biased toward the first rotation axis C, the buff 7 is appropriately displaced to follow the displacement of the workpiece accompanying the compound reciprocating rotation operation, and the corner portion 18 Since the buff 7 is disposed outside the movement space occupied by the main holder 11 and the sub-holder 15 during rotation, the outer diameter of the buff 7 can be adjusted to ensure that the curved surface of the buff 7 is properly polished. 11.15 increases without being limited by 15, and improves the follow-up performance of the buff 7 to keep it in constant pressure contact with the corner part 18 at an appropriate pressure during polishing, and the buff 7 can be applied to each part of the curved surface of the corner part 18. It is possible to reduce variation in contact pressure and suppress variations in the polishing state within the workpiece.

That is, the present invention provides a method for attaching a workpiece to a corner portion of the workpiece, which is parallel to the rotational axis of the polishing buff, which is placed in opposition to the corner portion of the workpiece so as to be able to be pressed against the corner thereof, and is included in an extended plane of a bisecting longitudinal section of the workpiece. To cause compound reciprocating rotation with the first rotation axis and the second rotation axis passing through the center of an arc perpendicular to the extension plane of the bisecting longitudinal section and circumscribed to the top surface of the corner portion as rotation centers, respectively. To,
A secondary holder for supporting a workpiece is attached to the main holder which is pivotally supported so as to be rotatable back and forth about the first rotation axis, and is rotatable back and forth about the second rotation axis; Moreover,
By arranging the buff outside the space occupied by the movement loci of the main holder and the sub-holder, Tm
This is an extremely excellent invention as a polishing device for T-shaped workpieces, as it can properly and efficiently polish the curved corner of a T-shaped workpiece, and also simplify the polishing mechanism and reduce costs. .

Note that the axial direction of the first rotation axis C and the relative arrangement between the first rotation axis C and the rotation axis a of the puff 7 are not limited to the embodiment described in E.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a plan view of the polishing device, FIG. 2 is a side view, FIG. 6 is an enlarged plan view of the main parts, and FIGS. E) is an explanatory diagram that sequentially shows the rotating posture and polishing state of the workpiece, and FIGS.
Cross section, X2-X2 cross section in Figure 4 (B), X3-X3 cross section in Figure 4 (C), X4-X4 cross section in Figure 4), and X5-X5 cross section in Figure 4 (E). It is an explanatory diagram. 7...Buff 11...Main holder 15...Sub-holder 17...Work 18...Corner part a...Rotation axis C...First rotation axis d...No. 2 rotation axis applicant
Chuo Seisakusho Co., Ltd. Agent Patent Attorney Hidehiko Okada Figure 1 Figure 2

Claims (1)

[Claims] A polishing device for polishing a corner curved surface of a workpiece having a T-shaped cylindrical surface shape over a predetermined range, the polishing device having a polishing device placed oppositely so as to be able to constantly press the workpiece against the corner portion. a first rotation axis that is parallel to the rotation axis of the puff and included in the extended plane of the bisected longitudinal section of the workpiece; and a first rotation axis that is perpendicular to the extended plane of the bisected longitudinal section and circumscribed to the top surface of the corner part. In order to perform compound reciprocating rotation with a second rotation axis passing through the center of the circular arc as the rotation center, a workpiece is mounted on a main holder that is pivotally supported so as to be rotatable in a reciprocating manner about the first rotation axis. An auxiliary holder for support is attached so as to be rotatable back and forth about the second rotation axis, and the puff is disposed outside the space occupied by the loci of movement of the holder and the auxiliary holder, respectively. A polishing device for T-shaped workpieces.