JPS6232760Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a brushing device for removing, for example, scale (oxidized film due to welding) from a workpiece that has been subjected to weld overlay processing.

BACKGROUND OF THE INVENTION Crankshafts of internal combustion engines are built up by welding in order to achieve rotational balance, and after welding, scales that have formed at the built up areas are removed with a brush. A conventional device for performing such work is configured such that a crankshaft is fixedly installed on a machine base and a rotating brush is moved in the axial direction of the crankshaft. In such devices, the time it takes to move the brush in the axial direction is the time required for the work, and since the crankshaft is a workpiece with a long axis, it takes a long time, and the brushes wear out due to repeated work. Since the brush simply moves along the crankshaft, it has become necessary to frequently replace the brush.

The present invention has been devised in view of the above-mentioned conventional problems and to solve them.

The purpose of this invention is to place a workpiece such as a crankshaft horizontally on the upper surface of an elevating member so that it can be raised and lowered freely.
A rotary shaft with a brush at the tip is placed above the locus of the lifting and lowering movement of the lifting member so that the horizontal direction perpendicular to the length direction of the workpiece is the axial direction, and this allows the lifting member to move up and down. Scales, etc. can be removed using the brush in a fixed position, thereby reducing work time.Also, by making the rotating shaft move freely in the direction of the workpiece together with the brush, the amount of wear can be compensated even if the brush wears out. Furthermore, by providing the elevating member with a fixed clamp member and a swinging clamp member that is swingable around a horizontal support shaft and that clamps the workpiece together with the fixed clamp member as the elevating member rises, The object of the present invention is to provide a brushing device for a workpiece, which can automatically clamp the workpiece when the elevating member rises to perform the brushing work, and which contributes to improving workability in this respect as well.

A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a partially sectional side view of the device according to the present invention, and FIG. 2 is a plan view. A lifter 3, which is an elevating member, is attached to the top of the stem 2, which vertically penetrates the machine base 1. A piston rod 4a of a cylinder 4, which is connected upward to the machine base 1, is connected to the lifter 3. The lifter 3 moves up and down due to the extension behavior and contraction behavior of 4a. On the upper surface of the lifter 3, a workpiece receiving member 5 in which a V-shaped workpiece placement groove is formed and a fixed clamping member 6 equipped with a claw 6a are fixed in an upright manner. There are two clamp members 6, and the clamp member 6 is provided between them. A support shaft 7 is installed horizontally on the upper surface of the lifter 3, which faces the fixed clamp member 6 in the front and rear directions, and is supported by support brackets 8, 8, and the horizontal support shaft 7 has a swinging clamp member 9 provided with a claw 9a.
is pivotally mounted, and the swinging clamp member 9 is swingable around the support shaft 7.

A lower portion 9b of the swinging clamp member 9 protrudes toward the lower surface of the lifter 3, and a roller 10 is rotatably attached to the lower end. A box 11 is fixed to the lower surface of the lifter 3, and a piston 13, which is constantly pressed in the direction of the clamp member 9 by a spring 12, is built into the box 11 so as to be freely movable. Machine 1 has L facing front and rear with box 11.
Since the letter-shaped cam member 14 is fixed upright and the pressing force of the piston 13 is acting on the lower part 9b of the swinging clamp member 9, the clamp member 9 is rotated counterclockwise in FIG. However, since the roller 10 is in contact with the cam member 14 at the lowered position of the lifter 3 shown by the chain line, the clamp member 9 does not swing counterclockwise and remains fixed. The swinging clamp member 9 maintains an open state with respect to the clamp member 6.

In the above-described lowered position of the lifter 3, the long-shaft crankshaft W from which the work of removing the scale 15 is carried out is supported by the workpiece receiving members 5, 5 in a horizontal position, and this support is carried out by the crankshaft. Pin portion W ₁ of shaft W receiving member 5
This is done by placing it on the V-shaped groove. When the lifter 3 rises due to the operation of the cylinder 4,
After the roller 10 rolls along the cam member 14a of the cam member 14, the roller 10 releases its contact with the cam member 14, so the swinging clamp member 9 rotates around the horizontal support shaft 7 due to the pressing force of the piston 13. As a result, the fixed clamp member 6 and the swing clamp member 9 are connected to the crankshaft W.
The crankshaft W is clamped by clamping the journal portion _W2 of the crankshaft W2.

A rotating shaft 16 is disposed at the upper part of the ascending and descending trajectory of the lifter 3, that is, at a position corresponding to the position of the crankshaft W when the lifter 3 is raised, and the axial direction of the rotating shaft 16 is a horizontal crankshaft. The horizontal direction is perpendicular to the length direction of W, and a rotating brush 17 is integrally connected to the tip. The rotating shaft 16 is a cylindrical shaft 1 that is rotatably supported by a machine frame 18 that is assembled and integrated with the machine base 1.
9 and is spline-fitted to the cylindrical shaft 19.
A pulley 21 to which the power of _M1 is transmitted via a belt 20 is fixed, and the cylinder shaft 19 is driven by a motor _M1.
and the rotating shaft 16 are rotated, and the rotating shaft 16, together with the brush 17, can freely move forward and backward in the direction of the crankshaft W with respect to the cylindrical shaft 19 due to the spline fitting.

As shown in Fig. 2, the rotating shaft 16 is the crankshaft W.
There are two brushes forming a set in the axial direction of the crankshaft W, and there are two sets on both sides of the front and rear sides of the crankshaft W, and four rotating brushes 17 are prepared with the crankshaft W between them. A pulse motor M2 is attached to the machine frame 18, located between the two rotating shafts 16, 16 forming a pair, and a connecting shaft ₂₂ is connected to the motor _M2 as shown in FIG. Feed screw portion 22 of connecting shaft 22
A nut member 23 is screwed onto a. A connecting plate 24 extending in the axial direction of the crankshaft W is coupled to the nut member 23 as shown in FIG.
Bearings 25, 25, which are fitted and connected to the rotating shafts 16, 16, are coupled to both ends of the rotating shaft 16, and the rotating shaft 16 is rotatable and slidable relative to the bearings 25. A spring 26 is interposed between the rotary shaft 16 and the cylindrical shaft 19, and the resilient force of the spring 26 constantly presses the rotary shaft 16 in the direction of the crankshaft W. When the lifter 3 is lowered when there is no
7 is the thrust bearing 2 installed inside the bearing 25
It is regulated by contacting the retainer 28a of No.8.

When the pulse motor M2 rotates while the rotary shaft ₁₆ has reached the forward or backward position, the nut member 23 moves forward due to the feeding action of the feed screw portion 22a of the connecting shaft 22 that rotates together with the pulse motor M2, and the nut member 23 moves forward. is transmitted to the connecting plate 24, and the bearing 25 moves forward with the connecting plate 24 relative to the rotating shaft 16, so that the rotating shaft 16 can further move forward due to the elastic force of the spring 26. In this way, the rotating shaft 16 It is configured to be able to move forward in the direction of the crankshaft W by an amount corresponding to the amount of rotation of the pulse motor _M2 . Of course, when the pulse motor M ₂ is rotated in the reverse direction, the rotating shaft 16 can be moved backward by the retainer 28a coming into contact with the sleeve 27.

Next, we will discuss brushing work.

The crankshaft W is supported by the workpiece receiving member 5 and the lifter 3 is raised. During the ascent, the fixed clamp member 6 and the swinging clamp member 9
Since the crankshaft W is automatically clamped, the workpiece clamping time can be included in the lifter raising time, and the work time can be shortened by the amount that the clamping time is omitted.
The lifter 3 rises above the solid line position in Figure 1,
After reaching the rising limit, it descends. When ascending or descending,
Since the rotating shaft 16 and the brush 17 are rotating, the scale 15 of the crankshaft 16 is removed by the brush 17, and even if the crankshaft 16 has a long shaft, the brush 17 can be rotated in a fixed position. The removal work is completed in a short time by simply moving the lifter 3 up and down. During the lowering process of the lifter 3, the roller 10 of the swinging clamp member 9 comes into contact with the cam member 14, so the clamp member 9 returns to the open state, so that the crankshaft W is automatically unclamped. Further, when the crankshaft W is raised by the lifter 3, the rotating shaft 16 and the brush 17, which have reached their forward limit as described above, are caused to retreat by the crankshaft W against the spring 26. As a result, brushing work can be performed while pressing the brush 17 against the crankshaft W by the elastic force of the spring 26, and the rotating shaft 16 and the brush 17 can be made to follow workpieces of slightly different sizes.

The above brushing work is performed on a large number of crankshafts, the number of brushes is counted with a counter, and when the amount of wear of the brush 17 reaches the number of crankshafts that exceeds the allowable amount, the pulse motor is
Drive _M2 . As is clear from the above description, the brush 17 is thereby moved forward together with the rotary shaft 16, and the amount of wear on the brush 17 can be corrected.

In the above embodiment, the device according to the present invention was used for descaling a crankshaft, but the device can also be applied to deburring any workpiece, for example.

As is clear from the above explanation, according to the present invention, the workpiece brushing work is completed by simply moving the lifting member up and down, which shortens the work time and improves work efficiency even for long-axis workpieces. It can be achieved, and
When the elevating member rises, the fixed clamp member and the swinging clamp member automatically clamp the workpiece, improving work efficiency in this respect as well.Furthermore, the rotating shaft with a brush at the tip is fixed in the direction of the workpiece. Since it can move forward and backward freely, wear of the brush can be compensated for by advancing the rotating shaft, and the number of times one brush is used can be reduced.
You can increase the time.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, with FIG. 1 being a partially sectional side view and FIG. 2 being a plan view. In the drawing, 3 is a lifter which is a lifting member, 5 is a workpiece receiving member, 6 is a fixed clamp member, 9 is a swinging clamp member, 16 is a rotating shaft, 17 is a rotating brush, and W is a crankshaft which is a workpiece. .

Claims (1)

[Utility Model Registration Claim] A lifting member that is driven to move up and down by a lifting device while maintaining a horizontal position; a receiving member fixed to the upper surface of the lifting member, on which a workpiece on a long axis is placed horizontally, and a fixed clamp member that abuts one side of the work; a swinging clamp member that is arranged to face the fixed clamp member and sandwich the workpiece, and has a claw portion at its upper end that abuts the other end of the workpiece and is further pivoted at approximately its center to the lifting member; a piston that is arranged on the underside of the lifting member and elastically presses against the vicinity of the lower end of the swinging clamp member, causing the claw portion to abut against the other side of the workpiece using the pivot portion as a swing axis; and a cam member that is arranged at the lowered position of the lifting member and abuts against the swinging clamp member as the lifting member descends, causing the piston to retreat against the elastic pressure and releasing the claw portion from contact with the workpiece. a rotating shaft that is provided at the elevated position of the lifting member so as to be perpendicular to the work and constantly biased in the direction of the work, and has a brush at its tip in the biasing direction for brushing the work.