JPS6031851Y2 - Knurled piece holder - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a knurling piece holder in which a knurling piece for knurling a round bar material is mounted so as to be movable toward and away from the round bar material.

Conventionally, knurling has been used to create small ridges or bumps on the surface of a round bar for secure gripping or decorative purposes.

The machining method involves fixing a round bar material to a rotating chuck of a lathe, supporting a knurling piece on a knurling holder, and attaching it to a tool rest.

The process was carried out by pressing a knurling piece onto the outer circumferential surface of the round bar.

However, this causes an excessive bias force to be applied to the rotating shaft of the lathe, resulting in a reduction in the life of the lathe.

In addition, in a grasp type knurling piece holder, which is mainly used in turret lathes and which presses the outer peripheral surface of a round bar material from both sides with two knurling pieces, when the round bar material is thin, when the knurling pieces are pressed, the material It was prone to eccentricity, which caused problems with centering.

The present invention solves the above-mentioned drawbacks, extends the life of the processing machine, and provides a knurling piece holder that facilitates centering work for materials.

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

Reference numeral 1 denotes a cylindrical holder main body, on one end surface of which three slider sliding grooves 1a are formed radially at equal intervals.

The cross-sectional shape of the slider sliding groove 1a is approximately trapezoidal with the width of the groove bottom being the maximum.

A hole of a desired diameter is provided at the center where the three slider sliding grooves 1a intersect in the holder main body 1.

2 is a slider, and the cross-sectional shape is approximately trapezoidal with the width of the bottom being the maximum so as to fit with the slider sliding groove 1a, and 1 can freely slide in contact with the slider sliding groove 1a as a guide. .

A knurling piece 3 is rotatably supported by a bolt near one end of the upper surface of the slider 2 in the sliding direction.

The slider 2 is assembled so that all the knurling pieces 3 are concentrated near the center of the holder main body 1.

A pin 6 that engages with a cam 5 (described later) to drive the slider 2 is screwed onto the bottom surface of the slider 2.

5 is the aforementioned disc-shaped cam having a desired width and having a through hole in the center.

Corresponding to the arrangement of the pins 6, three penetrating pin drive holes 5a are formed at equal intervals on the flat surface of the cam.

The shape of the pin drive hole 5a is approximately the same width as the diameter of the pin 6, and is long and arcuate or linear, with one end of the long hole located near the through hole of the cam 5, and the other end near the outer peripheral edge. All three are formed to be inclined in the same direction.

Note that the shape and inclination angle of the pin drive hole 5a are based on the cam 5.
It is easy to move the slider 2 by rotating the cam 5, and on the other hand, the cam 5 cannot be rotated due to the load in the moving direction of the slider 2.

A lever 7 for rotating the cam is screwed into a desired position on the outer peripheral surface of the cam 5.

On the other surface of the holder main body 1 on which the slider sliding groove 1a is not formed, a 61b for rotatably housing the cam 5 is formed, and a lever 7 is inserted into the outer peripheral surface and rotated in the circumferential direction. A movable elongated hole 1c is formed.

Further, on the bottom surface of the slider sliding R1a, three guides R1d are formed in which the pin 6 can freely move together with the slider 2.

A sleeve 8 is integrally formed with a flange 9 and a mounting portion 10.

The tip of the flange 9 is formed with a protrusion 9a that fits into the 61b of the holder main body 1 and restricts movement of the cam 5 in the axial direction.

The holder main body 1 and the flange 9 are connected with bolts 11.

Three guide grooves 9b are formed radially at equal intervals on the end surface of the protrusion 9a to guide the movement of the pin 6.

The mounting portion 10 has a substantially tapered shape so as to fit into a processing machine body 12 such as a processing machine, for example, a lathe.

Note that the guide groove 9b in the protrusion 9a is not necessarily necessary, and is not necessary as long as the slider 2 and pin 6 can move smoothly.

Next, the action will be explained.

By tilting the lever 7 left and right, the cam 5 rotates within the holder main body 1 by an amount corresponding to the tilting angle of the lever 7.

In addition, each pin 6 attached to the slider 2 is attached to a cam 5.
As the cam 5 rotates, it is driven by the pin drive hole 5a and simultaneously moves toward the center or the outer circumferential edge of the cam 5 by the same distance.

Since the pin 6 is attached to the slider 2, the pin 6
At the same time as the slider 2 moves, the slider guide groove 1a also moves.
Move by sliding inside.

In this case, the movement of the slider 2 in the circumferential direction is restricted by the slider guide 'fR1a of the holder body 1, and the pin 6 is restricted by the guide groove 1d and the guide i9b of the flange 9.

The slider 2 is the slider sliding groove 1a of the holder body 1.
As the knurling piece 3 attached to the slider 2 moves in the same manner, it presses against or separates from the round bar material to be knurled.

For example, when the pin regulation 1115a of the cam 5 is inclined in the direction shown in FIG. Move to.

Further, when the cam 5 is rotated in the direction of the arrow B, the knurling piece 3 moves toward the center of the holder main body 1 and comes into pressure contact with the round bar material, thereby performing knurling.

Since it has the above structure and operation, the following effects are achieved.

In other words, knurling is performed by pressing the outer circumferential surface of a round bar with three or more knurling pieces at regular intervals, so there is no unbalanced force applied to the processing machine such as a lathe (the length of the processing machine Not only can the service life be extended, but also the work of centering the knurling pieces on the round bar material is simplified, and the work time is shortened.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the knurling piece holder according to the present invention, and FIG. 2 is an exploded perspective view of the embodiment of FIG. 1. 1... Holder main body, 2... Slider, 3... Field piece, 5... Cam,
5a...In drive hole, 6...Pin, 8.
·····sleeve.

Claims (1)

[Scope of utility model registration request] A cam for regulating the movement of the sliders is rotatably attached to a holder body on which three or more sliders, each having a knurling piece pivotally supported, are radially and movably mounted, and the holder body is supported. A knurling piece holder characterized in that a sleeve that fits into a processing machine body is fixed to the holder body.