JP2018199166A - Clamp implement - Google Patents

Abstract

To provide a clamp implement which can process workpieces without applying a setup change to the clamp implement by using one kind of a clamp claw, although the workpieces have been processed hitherto by applying the setup change to the clamp implement which is adapted to diameters of the workpieces, when processing the workpieces having different diameters by using a machine tool or an exclusive machine by coaxially clamping them.SOLUTION: A clamp curve is formed by which a plurality of workpieces having different diameters can be clamped on workpiece gripping/holding abutment faces of a coaxial clamp implement for machining a pipe body, a rod body, and a ball body. The clamp implement has the clamp curve obtained by connecting a plurality of the gripping/holding abutment faces which are drawn by deviating a workpiece core position and also making it eccentric, by a mild curve.SELECTED DRAWING: None

Description

The present invention relates to a clamp tool for concentrically clamping a workpiece having a plurality of diameters with a single type of clamping claw, with a structure of a concentric clamp tool of a rod body, a tube body and a sphere in machine tool processing.

When machining workpieces with different diameters on a machine tool or dedicated machine tool, grip or grip the workpiece by moving it in the core direction of the V-shaped clamp claw from the left or right (or top or bottom), or clamp the clamp claw with the workpiece diameter. In the case of the V-shaped clamp claw, it is a point-by-point clamp that grips and holds (clamps) the workpiece without moving during processing. It was difficult.

JP 2009-262256 Gripping jig Actual opening 07-015287 Work gripping device

A gripping jig that can easily set rod-shaped gripping members with different diameters. In order to grip the rod-shaped gripping member in a box-like case with a recess, Two operation shafts connected to the member and slidable in a direction to separate the two gripping members, and an elastic member to move the two gripping members in the approaching direction are provided. The gripping member whose gripping surface interval is narrowed by being urged by the elastic member is slid in the direction to be separated by operating the operation shaft, and after inserting the member to be gripped between the gripping members, There is a technique (for example, Patent Document 1) relating to being able to grip a member to be gripped by urging by an elastic member by stopping the operation.
The workpiece gripping device prevents the rear end of the finger from falling off the rear end of the pusher and allows the finger opening / closing angle to be adjusted. The total length of the pusher is larger than the stroke of the piston rod. As a result, even if the piston rod protrudes to the foremost limit, the roller pivotally supported at the rear end of the finger does not fall off from the rear end of the pusher. In addition, since the pusher is provided on the piston rod so that the front / rear position can be adjusted and detachable, a technique in which the opening / closing angle of the finger can be appropriately adjusted according to the size of the workpiece (for example, Patent Document 2). There is.

When machining a workpiece with a different diameter on a machine tool or a dedicated machine, it is possible to replace the clamp claw that matches the workpiece diameter. The invention is to invent a clamp claw that can be processed without doing so.

A first invention provides a clamp tool provided with a clamp curve capable of concentrically clamping a workpiece having a plurality of diameters on a workpiece gripping / gripping contact surface (line) of the clamp tool.
The clamp curve is a clamp claw that can be drawn by drawing arcs decentered at equal intervals from the small diameter to the large diameter of the workpiece diameter to be processed, with the core of the smallest diameter of the workpieces having a plurality of diameters as the reference center point. The abutting surface at the time of clamping is provided as a gripping / gripping surface for clamping a workpiece having a plurality of diameters, and arcs eccentrically spaced at equal intervals from the small diameter to the large diameter of the workpiece diameter (for example, A clamping tool characterized by having a gripping / gripping surface drawn with a gentle curve to clamp a workpiece drawn in an infinitely small unit.
A second invention provides a clamp tool provided with the clamp curve described in the first invention as a clamp tool capable of clamping a sphere having a plurality of diameters.
The clamp curves of the spheres (balls) having a plurality of diameters are arranged in a structure that adapts the concentric clamp curves corresponding to the rods and tubes described in the first invention to the concentric clamps of the spheres (balls). A clamp device characterized by that.
3rd invention is a clamp tool which has a clamp curve as described in 2nd invention, and when the work (W1) of the above-mentioned ball (ball) object is a thing of various diameters like a pearl, a clamp curve Is drawn in an infinitely small unit (for example, 0.1 mm) arcs eccentrically spaced at equal intervals from the small diameter of the work to the large diameter, and the work drawn in the infinitely small unit is clamped Use a clamping tool with a clamping curve drawn by connecting the gripping and gripping surfaces with a gentle curve. Clamping tool characterized in that the gripping part can be a line or a surface and can handle objects of various diameters.

When machining a workpiece with a different diameter on a machine tool or a dedicated machine tool, the setup change was not necessary because the setup change was made to a clamp claw that matched the workpiece diameter. I was able to save.

Since spheres other than rods and tubes can be clamped concentrically, for example, a sphere (ball) workpiece such as a pearl can be processed without changing the setup.

Clamping curve AA and BB sectional drawing of FIG. Schematic of work clamp. The clamp state figure with the clamp nail of a ball (ball) body.

Clamp claw of this application can be processed without changing the work of multiple diameters in machine tool processing with one clamp jig (claw). It can be implemented as a concentric clamp for workpieces with different diameters used in one machine in a mass production line.

Each dimensional relationship in the drawings is enlarged for important portions, exaggerated where details are difficult to understand, and reduced when describing wide portions or portions that are less important in the present invention. Thus, the dimensions between and within the drawings are not proportional, and are not actual or scaled.
If the distance between the lines is narrow, it is likely to become a single line that is black and thick at the scanning stage, so the distance between the lines is widened or described with a single line.
Furthermore, parts other than the basic (main) mechanism of the present invention are omitted between the drawings.

In the first aspect of the present invention, the work holding / grip contact surface (line) of the clamp claw is provided as a clamp curve capable of clamping a work having a plurality of diameters. Although the setup was changed to a clamp claw adapted to the diameter as a clamp jig having a clamp curve, it is not necessary to change the setup, but the clamp curve is calculated from the minimum diameter of the workpiece flowing in the processing line. It is a line provided between the cores of the radius of the smallest workpiece, and the contact surface between the workpiece and the clamping jig at the time of clamping is a point on the clamping curve.
For example, at the time of implementation, I think that there are almost no cases where it is possible to clamp 2 to 3 types (for example, R20, R40, and R60 described in FIGS. 1A and 1B), so that AB, BC, and C- in FIG. If the work surface and clamping jig contact surface are provided between D and C, the workpiece can be clamped strongly and concentrically without causing a clamp mark, so it corresponds to the required diameter (work flowing on the machining line). It is preferable to provide three types of contact surfaces.

FIG. 2A is a schematic view of a state in which a workpiece (W2) of a tubular body or a rod body having joint portions at both ends is clamped by a clamping jig (K2), and the clamping jig is clamped. It is the figure which clamps a workpiece | work with a core by the movement of the up-down relative direction of the arrow described on the jig | tool left.

FIG. 2B is a schematic diagram of a state in which a ball (ball) work (W1) is clamped by a clamp jig (K1), and the clamp jig is in the vertical relative direction of the arrow on the right or left of the clamp jig. It is the figure which clamps the workpiece | work with a core by the movement of.

FIG. 1A shows an example of a clamp curve setting procedure (point) described in the first invention. In this figure, the workpiece minimum R is 20, and the arc core drawn by R20 and the R20 The center point of R40 from the vertex A of R20 is plotted on the line extending the center line connecting to the vertex A of R20, and the center point of R40 is decentered by 5 mm in the direction away from the vertex A of R20 from the plotted center point. R40's arc is drawn as a point, and then the center point of R20 is plotted from the vertex A of R20, and the center point of R60 is decentered by 5 mm * 2 in the direction away from the vertex A of R20. Then, an arc of R60 is drawn, and then the center point of R80 from the vertex A of R20 is plotted, and a point that is eccentric by 5 mm * 3 in the direction away from the vertex A of R20 from the plotted center point is R80. Although the arc of R80 is drawn as the center point, the arc of R80 is located to the right of the center line R20H in the vertical direction of R20, so it cannot be set as the workpiece contact surface. It means that it is limited to the setting within the radius of the minimum workpiece.

FIG. 1B shows that the set eccentricity of the clamp curve in FIG. 1A is changed from 5 mm to 2,5 mm. If the set eccentricity is decreased, the curve of the clamp curve is reduced but the width in the vertical direction is increased. Therefore, it is preferable to set the clamp curve by determining the amount of eccentricity according to the space installed in the machine and the diameter of the workpiece to be processed.

FIG. 1C is a ball (ball) with the clamp curve of FIG. 1A arranged vertically at 60 ° (this angle can be arbitrarily set as long as it is an example and can hold and hold the workpiece). It is an arrangement diagram of a clamp jig having a clamp curve corresponding to the workpiece (W1) of the above, and shows that the setting procedure of the upper right clamp curve is the same as FIG. 1A, the target clamp workpiece in this case is The clamp curve in R20, 40, 60 is illustrated.
Furthermore, when the work (W1) of the sphere (ball) body has various diameters such as pearls, the setting of the clamp curve is decentered at equal intervals from the small diameter to the large diameter of the work diameter. Clamping as a clamp curve drawn by connecting the gripping and gripping surfaces with gentle curves to draw a circular arc in infinitely small units (for example, 0.1 mm) and clamping the workpiece drawn in infinitely small units By coating or fixing a thin film (for example, synthetic resin) having elasticity on the contact surface with the workpiece, the point gripping / gripping surface can be made into a line or a surface with various diameters. Can correspond to things.

FIG. 3 is a schematic state diagram in which R20 (W1a), 40 (W1b), and 60 (W1c) of the work (W1) of a ball (ball) body are clamped. In this case, the clamps R20 (K1a) and 40 are clamped. (K1b) and 60 (K1c) are illustrated as being structured to be clamped by relative movement from the left and right.

It can be used as a clamping tool (claw) for machining a workpiece with several diameters using a machine tool.

The first invention is
Ri clamp fixtures der provided with a work杷持-gripping contact surface of the clamp fixture a workpiece of a plurality of diameters as concentric clamp can clamp the curve, the clamping curve relative to the center of the smallest diameter of the workpiece a plurality of diameter X of the clamp curve that is eccentric so that it passes through the arc of the minimum diameter of the workpiece that is sequentially set from the apex on the X axis of the drawn arc of the minimum diameter, and then from the small diameter to the large diameter. Clamping tool characterized in that it is formed as a clamp curve by connecting the gripping and gripping contact surfaces of the workpiece generated between the arc and arc contacts, which can be drawn with an arc on the shaft core to provide.
Furthermore, the clamp curve is a clamp claw that can be drawn by drawing arcs that are eccentric at equal intervals from the small diameter to the large diameter of the workpiece to be machined, with the core of the radius of the minimum diameter of workpieces of multiple diameters as the reference center point. The abutment surface at the time of clamping is provided as a gripping and gripping surface for clamping workpieces of multiple diameters, and the eccentricity arcs that are eccentric at equal intervals from the small diameter to the large diameter of the workpiece are limited. draw in the rather small units (e.g. 0.1 mm), most of the work diameter of the machining by being in that the drawn infinitely small unit work depicting杷持-gripping surface for clamps in gentle curve For workpieces between small diameter and maximum diameter, it is possible to use a clamp that can be clamped .

FIG. 1B shows that the set eccentricity of the clamp curve in FIG. 1A is changed from 5 mm to 2,5 mm. If the set eccentricity is decreased, the curve of the clamp curve is reduced but the width in the vertical direction is increased. Therefore, it is preferable to set the clamp curve by determining the amount of eccentricity according to the space installed in the machine, the radius of the smallest workpiece to be machined, and the number of workpiece diameters to be set.

FIG. 3 is a schematic state diagram in which R20 (W1a), 40 (W1b), and 60 (W1c) of the work (W1) of a ball (ball) body are clamped. In this case, the clamps R20 (K1a) and 40 are clamped. (K1b) and 60 (K1c) are illustrated as being structured to be clamped by relative movement from four directions .

Claims (3)

Clamping tool provided with a clamping curve that can clamp workpieces of multiple diameters concentrically. A clamp tool provided with the clamp curve according to claim 1 as a clamp tool capable of concentrically clamping a sphere having a plurality of diameters. The setting of the clamp curve according to claim 2 is drawn with an arc decentered at equal intervals from a small diameter to a large diameter of the work diameter in an infinitely small unit, and a work drawn in the infinitely small unit Either clamp or clamp the gripping / grip surfaces to be clamped with a gentle curve, and either attach or coat a thin film with elasticity on the contact surface with the workpiece Clamping tool provided with a point or gripping part as a line or surface.

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