JPH0426192Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a device for preventing chips generated during cutting by a lathe or the like from entering important parts adjacent to the cutting part.

[Conventional technology]

There is no prior art related to the present invention.

[Problem that the invention attempts to solve]

When cutting with a lathe or the like, for example, when turning the end face Ca or pilot hole Cb of the crankshaft C as shown in the upper left of Fig. 1, there is a gap between the roller-type work rest R that supports the journal part Cj and the journal part Cj. There is a risk that chips may enter and create impressions, rendering the entire expensive crankshaft C defective, but there has been no suitable method for this problem in the past.

[Means for solving problems]

The present invention has been developed to solve the above-mentioned problems, and its gist is to face the cutting point of the workpiece, move freely in the direction of the cutting point in front of the cutting point, and in a direction orthogonal to the moving direction. A rotatable chip prevention plate is disposed on the chip prevention plate, and the workpiece can be cut from the front of the chip prevention plate through a hole drilled at a position corresponding to the cutting location of the chip prevention plate. A chip prevention device is characterized in that it is configured to cut a portion.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to an embodiment of an apparatus suitable for mixed production of two types of workpieces, such as crankshafts.

In the figure, reference numeral 1 denotes a fan-shaped chip prevention plate whose base is fixed to one end of the support shaft 2, and at the same distance from the axis of the crankshaft C.
Holes 1a and 1b are formed for fitting into the shaft end Cc adjacent to Ca and Cb, respectively.

The support shaft 2 is supported by a boss 4 of a support stand 3 attached to a position close to the workpiece of the lathe, and the other end of the support shaft 2 is provided with a deep hole 2 in the axial center.
A spline groove 6 is formed at the entrance thereof, and a spline boss 5 as shown in FIG. , are positioned so as to appear and disappear in the hole 2a.

The rear end of the spline shaft 7 is supported on the support base 3 by a bearing 9 via a spline boss 8, and an arm 10 is fixed to the spline boss 8 for rotating the spline shaft 7.

Reference numerals 11 and 12 are rotation angle adjustment mechanisms for the chip prevention plate 1 provided facing both sides of the upper end of the arm 10;
When the chip prevention plate 1 is rotated as described later, the holes 1a and 1b are adjusted so as to fit accurately into the shaft end Cc of the crankshaft C, which is the workpiece.

An actuator 13 rotates the chip prevention plate 1 and is operated hydraulically, pneumatically or electrically, and the tip of the rod 13a is connected to the lower end of the arm 10 by a connecting fitting 13b.

Reference numeral 14 denotes an actuator that moves the chip prevention plate 1 from side to side.The power source is the same as described above, but the tip of the rod 14a is fixed to the lower end of the forked arm 15 as shown in FIG. The upper end forked portion 15a of the arm 15 is fixed to the support shaft 2 with a bolt 16.

The stroke of the chip prevention plate 1 by the actuator 14 is determined as follows.

First, as shown in FIG.
When 4a is retracted, the hole 1a or 1b of the chip prevention plate 1 fits into the shaft end Cc of the crankshaft C. Furthermore, when the chip prevention plate 1 is moved back the most, that is, when the rod 14a of the actuator 14 protrudes, the chip prevention plate 1 is placed at a position where there is sufficient space between it and the inspection rod B, as shown in the imaginary line position. The stroke is determined so as to stop at .

In the embodiment of the present invention constructed in this manner, when the crankshaft C is set on a lathe or the like and the actuator 14 is operated after supporting the journal portion Cj with the roller type work rest R, the support shaft 2 is moved to the boss 4. Move inside to the left in Figure 1.

During this time, the actuator 13 also operates to rotate the arm 10, for example, clockwise, until one side of its upper end abuts the adjustment mechanism 11, and the hole 1a is connected to the shaft end Cc of the crankshaft C as shown in FIG. Match them so that they fit together.

As a result, by continuing the operation of the actuator 14, the chip prevention plate 1 is moved so that the hole 1a is located at the shaft end of the crankshaft C, as shown by the solid line in FIG.
Cc, and the chip prevention plate 1 is stopped and held at this position.

Here, the crankshaft C is rotated and the turning points Ca and Cb are cut by the cutter H, but the chips generated at this time are blocked by the chip prevention plate 1 and enter the roller type work rest R side, as described above. do not.

When turning a crankshaft C having a different shaft diameter, the actuator 13 is operated in the opposite direction so that the other end of the arm 10 is aligned with the adjusting mechanism 10.
Rotate counterclockwise until it touches hole 1b.
can be fitted onto the shaft end Cc of the crankshaft C.

[Effect of idea]

As described above, the chip prevention device according to the present invention includes a chip prevention plate that faces the cutting location of the workpiece, is movable in the direction of the cutting location in front of the cutting location, and is rotatable in a direction orthogonal to the moving direction. is arranged, and the cutting part of the workpiece is cut from the front of the chip prevention plate through a hole drilled at a position corresponding to the cutting part of the chip prevention plate. The chips that fly away when cutting the workpiece are blocked by the chip prevention plate and do not enter important areas such as the journal.

Therefore, it is possible to avoid damage caused by entering between the roller-type work rest and the journal part and causing damage such as, for example, rejecting the entire expensive crankshaft, resulting in a highly accurate crankshaft, etc. Furthermore, when a plurality of holes with different diameters are formed in the chip prevention plate, there are various effects such as being able to handle workpieces of different diameters, so that there is no problem in mixed flow production.

[Brief explanation of the drawing]

FIG. 1 is a front view of the present chip prevention device, FIG. 2 is a sectional view taken along line A--A in FIG. 1, and FIG. 3 is a view taken in the direction of arrow B in FIG. 1...Chip prevention plate, 1a, 1b...hole, 2...
Support shaft, 3... Support stand, 5, 8... Spline boss, 7... Spline shaft, 6, 9... Bearing, 10
... Arm, 11, 12 ... Rotation angle adjustment mechanism,
13, 14... Actuator.

Claims (1)

[Scope of utility model registration request] A chip prevention plate that faces the cutting part of the workpiece and is movable in the direction of the cutting part and rotatable in a direction perpendicular to the moving direction is disposed in front of the cutting part. A chip prevention device characterized in that the chip prevention device is configured to cut the cutting part of the workpiece from the front of the chip prevention plate through a hole drilled at a position corresponding to the cutting part.