JPS5937003A - Guide device in peeling machine - Google Patents

Abstract

PURPOSE:To make the supporting condition of a work stable for enhancing cutting accuracy, by supporting the work in the vicinity of a cutter. CONSTITUTION:A plurality of rod-like blades 3 each having a guide surface 5 at its front end are radially arranged around a rod-like work W in the front of a rotary cutter 1. The blades 3 are positioned at positions where the guide surfaces 5 abut against the work W, by means of a positioning mechanism including an arm 13, a cam follower 20, etc., and are urged in the direction in which the guide surfaces 5 are made into contact under pressure with the work W, by means of an urging mechanism including a piston 46, etc. With this arrangement, the work W may be supported in the vicinity of a cutter 1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a two-healing machine (patterning machine) that cuts the outer periphery of a rod-shaped workpiece such as a wire, bar, or tube using a rotary cutter trap. This invention relates to a workpiece guide device that guides and supports a workpiece at the front.

Conventionally, a set of rollers or a collet type have been adopted as this type of guiding device. The roller set device uses multiple rollers to guide and support the outer circumference of the workpiece, and there are relatively few problems when the workpiece is large in diameter. However, since the point of support for the workpiece is separated from the cutter, In this case, it is not possible to stably support the workpiece, resulting in a decrease in cutting accuracy. Further, the workpiece support state becomes unstable due to a decrease in the roundness of the workpiece due to uneven cutting, vibration of the workpiece, or pressure caused by biting of chips. The collet type is a trap that passes the workpiece into a cylindrical body with slits and supports the workpiece on the inner periphery of the tip of the cylindrical body. However, even with this device, the distance between the support point and the cutter cannot be made sufficiently small, which may result in unstable workpiece support and reduced cutting accuracy. In the formula, it is necessary to replace the collet in response to changes in the diameter of the workpiece, so
There are problems in that it takes time to replace and requires a large number of expensive collets.

Furthermore, the support stability for the workpiece is significantly reduced due to uneven wear of the collet, biting of chips, reduction in roundness and runout of the workpiece. A blade type guide device has already been proposed as a countermeasure to these problems. This device guides and supports the workpiece using the tip surfaces of a plurality of rod-shaped blades arranged radially, but even with conventional blade-type devices, the support stability for the workpiece is insufficient and there is a risk that cutting accuracy will decrease. Also, it takes time to adjust the blade when changing the diameter of the workpiece.

In order to solve the above-mentioned conventional problems, the present invention is an improvement of the blade type guide device, and will be explained as follows with reference to the drawings.

In FIG. 1, which is a vertical cross-sectional partial view, 1 is a rotary cutter that cuts the outer periphery of a bar-shaped workpiece W that is fed linearly in the direction of the noon mark F, and in front of the cutter 1 is a front part that guides and supports the workpiece W. A guiding device 2 is provided. Although not shown, a rear guide device is provided at the rear of the cutter 1.

As shown in FIG. 2, which is a partially cutaway view of FIG. The provided guide surface 5 is in contact with the outer periphery of the workpiece W. As shown in FIG. 1, each blade 8 has a rod 6 extending in the radial direction of the workpiece W, and a pole at the tip (inner end in the radial direction) of the rod 6.
+I-: Meshida rod 7 is provided. The rod 7 protrudes rearward (in the direction of arrow FJj) from the rod 6 and is fixed to the inner surface of the rear half (right half of No. 11A) of the rod 7. The guide surface 5 is formed by the carbide tip 9. There is.

As shown in Fig. 2, the end of the rod 6 opposite to the workpiece W has two
A crotch-shaped bracket 10 is formed, and the bracket 1
A small block 11 is rotatably connected via a pin 12 between the two fork portions of the 0. The pin 12 is perpendicular to the longitudinal direction of the rod 6 and the longitudinal direction of the workpiece W with χ↑. As shown in FIG. 1, the block 11 is fitted inside a frame-shaped bracket 15 provided with a serration at the end of an arm 18, and is fixed to the bracket 15 by a center adjustment port 16 and a lock nut 17. The bolt 16 extends in the same direction as the rod 6 and is screwed into the screw hole of the block 11 and bracket 15. The arm 18 is parallel to the workpiece W, has the bracket 15 at the rear end (right end in FIG. 1), has an outward flange 19 with a rectangular cross section in the middle, and has a cam follower \2 at the front end.
0 (bearing) is equipped for comrades. In FIGS. 1 and 8 (a partial cross-sectional view of FIG. It matches. The flange 19 is slidable only in the radial direction within the groove 22, and the flange 19 allows the arm 18 to move freely within the groove 22.
is held in a position parallel to the workpiece W. Groove 22
The body 21 is provided with a radius of 28.24 mm in the workpiece radial direction for passing the arm 18 through. As shown in FIG. 1, the cam follower (20) is fitted into a cam groove 26 in the body 25 in a state where only transfer is possible.As shown in FIG. When the body 25 rotates in the direction of arrow R,
The inner surface of the groove 26 (cam facing).
It is designed to move in the direction away from. In order to enable the above-mentioned rotation, the body 25 is formed of an annular body similar to the workpiece W, and F? Fixed body 21 in Figure 1
It is built in so that it can rotate freely. A worm gear 29 is provided on the outer periphery of the body 25, and a worm pinion 80 meshes with the gear 29. The pinion 80 is connected to a size changing handle shaft 81.

The portion of the lid 6 close to the bracket 10 passes through the hole 32 of the body 21, and an oil seal (v88) in the hole 82 prevents cutting water from entering.

Rod 6 between oil sea/l/8B and rod 7
is provided with a long hole 85 in its longitudinal direction, and a pin 86 parallel to the pin 12 is fitted into the long hole 85. pin 3
6 is a bifurcated bracket 8 provided at the rear end of the connecting rod 37.
9 (Figure 2) is the installation. Rod 8 as shown in Figure 1
7 is a member extending parallel to the workpiece W, and is connected to the hole 3 of the body 21.
The piston rod 45 is slidably fitted into a bush 40 and a seat 1v41 provided in the piston rod 8, and a male threaded portion 42 at the front end is screwed into a threaded hole at the rear end of the piston rod 45. Rod 45 has hole 38
The front end of the rod 45 is fixed to the rear end surface of the piston 46 by a bolt 47. The piston 46 is an annular body similar to the workpiece W, and its inner and outer circumferences fit into a cylinder formed by the body 21, and the block direction hydraulic chamber 48 is connected to the rear end surface of the outer circumference of the piston 46 and the end of the body 21 behind it. An opening direction hydraulic chamber 49 is formed between the front end surface of the outer peripheral portion of the piston 4'6 and the end surface of the body 21 in front thereof. Although not shown, both hydraulic chambers 48 and 49ii are connected to a hydraulic power source via pressure regulating valves and the like. Reference numeral 50 denotes a piston gasket interposed between the piston 46 and the body 21, which is located in a groove on the inner and outer peripheral surfaces of the piston 46 as well as on the outer periphery mi of a cylindrical portion 51 with a slightly smaller diameter that protrudes forward from the piston 46. Each is currently fitted. The unthreaded portion of the bolt 47 is connected to the cylindrical portion 51 and the hole 54 of the piston 46 body.
The threaded portion at the tip of the port 47 is screwed into the threaded hole of the rod 45, and is connected by a diametrical pin 52 so as not to be relatively rotatable.

Explain the operation. Hydraulic pressure is supplied to the hydraulic chambers 48.49 of the cylinder, and the piston 46 pulls the rod 45.87 in the direction of arrow A due to the differential pressure between the two hydraulic chambers 48.49. A tensile force in the same direction is applied through the

As a result, the blade 8 is centered on the bottle 12 as shown by the arrow A'
The blade guide surface 5 is biased in the direction of forward rotation as shown in FIG. IVC pressure contact and cutter 1
The workpiece W is positioned at the center of rotation of the workpiece W.

The workpiece W may tend to become eccentric due to dimensional errors or vibrations. In that case, the workpiece W is one blade 3, for example.
When trying to push and expand only the piston 46, the tensile force from the piston 46, which had been distributed to the 8 wooden blades 8, is
If the workpiece WK is distorted by concentrating on the blade 3 and the force is about 8 times the normal force of the 8 blades, the piston 46
Insert and turn bolt 47. Then, since the rod 45 rotates together with the port 47, the threaded length of the male threaded part 42 changes, and the rod 87 moves in the direction of arrow A or in the opposite direction, slightly rotating the blade 8, which moves the guide surface from the trap. The radial position of the workpiece No. 5 is adjusted. By performing this work while measuring the position of the guide surface 5 with a gauge or the like, the worn guide surface 5 can be returned to a predetermined position.

When changing the diameter of the workpiece W, the size changing handle shaft 81 is turned by an appropriate angle. Then, the pinion 80 rotates together with 1M81, the body 25 rotates, and the eccentric groove 26 moves in the direction indicated by the arrow in FIG. 2 or in the opposite direction.
The cam follower 20 moves in the radial direction of the workpiece. Therefore, while the arm 18 in FIG. The position iKt,K corresponding to the new dimension is positioned.

The bolt 16 that is inserted into the bracket 15 is used as follows. That is, by turning the bolt 16, the position of each blade 8 in the workpiece radial direction can be adjusted together with the block 11 and the bottle 12.

As explained above, according to the present invention, a plurality of rod-shaped blades 8 having guide surfaces 5 at their tips are provided radially around the rod-shaped workpiece W in front of the rotary cutter 1, and are used to position the arm 18, cam follower 20, etc. The mechanism positions the blade 8 so that the guide surface 5 comes into contact with the work WVC, and moves the blade 3 in the direction where the guide surface 5 comes into pressure contact with the work WVC from the piston 46, etc.
It is strong. In this way (1), the workpiece W can be supported at a position near the cutter IVC, and the workpiece tK
It is possible to improve cutting accuracy by stabilizing the support state for the material.

Furthermore, even when the dimensions of the workpiece W change, the position of the blade 8 can be easily changed. When hydraulic pressure is used in the urging mechanism as in the illustrated embodiment, the pressing force of the blade 8 against the workpiece WK can be easily adjusted 75 by simply changing the hydraulic pressure by operating a regulating valve or the like.

[Brief explanation of the drawing]

Fig. 1 shows the vertical cross section 1'2I of the embodiment, and Fig. 2 shows the vertical section 1'2I of the embodiment.
FIG. 8 is a partial schematic cross-sectional view of FIG. l... Cutter, 2... Guide device, 8... Blade, 5... Guide IIi, 13...
... Arm (positioning mechanism), 46... Piston (biasing mechanism), W... Work

Claims (1)

[Claims] A plurality of rod-shaped blades each having a guide surface at the tip are provided radially around the rod-shaped workpiece in front of the rotary cutter,
A guide for a peeling machine characterized in that a positioning mechanism that positions the blade at a position where the guide surface contacts the workpiece and a biasing mechanism that biases the blade in a direction that the guide surface comes into pressure contact with the workpiece are connected to the blade. Device.