JPH11138372A - Clamping device and positioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide each simple device for clamping and positioning in a machining process for a member which has a plurality of curvatures, and is formed by means of extrusion molding. SOLUTION: A block 20 is fixed onto a base 10, and a template 30 with a cut-out laid along the curvature of a work W, is locked on the block. A plurality of clamping devices 40 are engaged with a recessed part between the base 10 and the block 20, and with the cut-out so as to be positioned and fixed by means of a magnet holder 46. Each clamping device 40 is equipped over a sub-base with a fixing block 42, a movable block 43, a pneumatic cylinder 44, and with a lever 45, the movable block 43 is movably pressed by means of the pneumatic cylinder 44 so as to allow the work W to be held between the fixed block 42 and the movable block 43, and concurrently, the lever 45 is rotated around an axial member as a fulcrum so as to allow the work W to be pressed from above.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clamping device and a positioning device for machining an extruded member having a plurality of curvatures, such as a frame member of an aircraft.

[0002]

2. Description of the Related Art Conventionally, as a clamping device or a positioning device for a member having such a curvature, Japanese Patent Application Laid-Open No. Hei 6-1265 is known.
No. 67, Japanese Unexamined Patent Publication No. Sho 60-263673 are disclosed.

FIG. 5 shows an example of Japanese Patent Application Laid-Open No. 6-126567.
Shown in In this apparatus, a plurality of positioning devices 103 and clamping devices 104 are arranged on a base 102 so as to face each other with a work 101 interposed therebetween, and each device is indexed at one end by an index plate 105.
Is fixed to a long ball screw 106 fixed thereto and slidable on the base 102, the positioning device 103 is fixed by a wedge-shaped clamp 108 by a positioning bar clamp cylinder 107, and the clamp device 104 is a clamp cylinder. The work is clamped by the actuator 109.

FIG. 6 shows JP-A-60-263673. This is because the slider 203 is reciprocated along the rail 204 by driving the first drive cylinder device 201 to reciprocate the piston 202, and
5 is adjusted in the front-rear direction, and the second drive cylinder device 206 is driven to reciprocate the piston 207 to thereby move the clamp arm 208 around the fulcrum (arrows in the drawing).
A clamp device is disclosed in which the pressing member 205 is moved up and down to move an arbitrary position on a line on a workpiece.

[0005]

However, according to the above-mentioned Japanese Patent Application Laid-Open No. 6-126567, it is possible to cope with works of various shapes, but it is a combination of a ball screw and a plurality of cylinders. Complex and expensive. Further, the apparatus disclosed in Japanese Patent Application Laid-Open No. Sho 60-263676 also has a problem that the apparatus is complicated and expensive because it uses a plurality of cylinders.

Accordingly, an object of the present invention is to provide a clamping device and a positioning device for machining a member having a plurality of curvatures which are extruded and formed by a simple structure in order to solve the problems of the prior art. .

[0007]

According to a first aspect of the present invention, there is provided a fixed block fixed on a plate-shaped sub-base, and a fixed block disposed opposite to the fixed block. A movable block for holding the workpiece in cooperation with the movable block, a pneumatic cylinder connected to the movable block and moving the movable block linearly on the sub-base, and one end rotatably locked to the sub-base, A substantially Z-shaped lever for loosely fitting an elongated hole provided in an intermediate portion to the shaft fixed to the movable block and pressing the work at the other end, and a fixed jig integrally connected to the sub-base; And a tool.

According to a second aspect of the present invention, there is provided a square plate-shaped block fixed on a base and having a concave portion, a sub-base fitted to the concave portion and arranged on the base.
It is placed on the block, is detachably locked, and has a plate-shaped template provided with a plurality of notches in accordance with the curvature of the work, and is fixed on the sub-base and fits into the notch. A fixing block, a fixing jig integrally coupled to the sub-base and fixed to the base, and a mechanism for clamping a work on the sub-base in cooperation with the fixing block, I do.

According to a third aspect of the present invention, there is provided a pin standing on a base for positioning a work, a square plate-shaped block fixed on the base and having a concave portion, and mounted and detachable on the block. And a plate-shaped template provided with a plurality of notches in accordance with the curvature of the work, and a sub-base fitted on the recess and arranged on the base,
A fixed block fixed on the sub-base and fitted to the notch; a movable block disposed opposite to the fixed block and cooperating with the fixed block to clamp the work; A pneumatic cylinder that linearly moves on the sub-base, one end of which is rotatably locked to the sub-base, and a long hole provided at an intermediate portion is loosely fitted to a shaft fixed to the movable block; A substantially Z-shaped lever that presses the work with a fixing jig integrally fixed to the sub-base and fixed to the base;
It is characterized by having.

According to a fourth aspect of the present invention, in the second or third aspect, the material of the base is a magnetic material, and the fixing jig of the clamp device is a magnet holder.

That is, in the present invention, a rectangular plate-like block having a concave portion is fixed on a base, and a template having a plurality of cutouts is placed on the block and detachably locked. Next, a plurality of clamping devices are arranged on the base in a direction perpendicular to the template corresponding to the plurality of notches of the template. Then, one end of the sub-base of the clamp device is inserted and fitted into the recess of the square plate-shaped block, the fixed block on the sub-base is inserted and fitted into the notch of the template, and the fixing jig fixed to the clamp device is used as the base To fix and position the clamp device. Thereafter, the work is placed on the fixed block.

Next, pressure is supplied to the pneumatic cylinder of the clamp device to push the movable block, and the work is strongly held between the fixed block and the movable block. At the same time, the substantially Z-shaped lever is rotated by the movement of the movable block using the elongated hole provided in the intermediate portion as a point of force, pivoting on one end locked to the sub-base as a fulcrum, and pressing the workpiece with the other end as an operating point. .

As described above, since the fixing blocks of the plurality of clamp devices are fitted into the plurality of notches of the template along the curvature of the work to position each clamp device,
Positioning can be easily performed on a work having a plurality of curvatures, and a work having a different curvature can be dealt with by exchanging templates. Further, the work clamp uses a single pneumatic cylinder to operate the movable block and the substantially Z-shaped lever, so that it is possible to provide an inexpensive clamping device and positioning device with a simple structure.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. Here, FIG. 1 is a perspective view of a positioning clamp device according to an embodiment of the present invention, FIG. 2 is a perspective view of the clamp device, and FIG. 3 is a front view of a state before a workpiece is clamped by the clamp device. 4 shows a front view of a state after the work is clamped by the clamp device.

In FIG. 1, a base 10 is made of a material such as a magnetic steel plate, and a block 20 is fixed to one side of the base 10. The block 20 is formed in a rectangular plate shape, and a shelf 21 of a predetermined length is protruded from the long side over the entire length. A plate-shaped template 30 having at least two guide pins 22 for positioning is placed on the upper surface of the block 20 and is detachably locked and fixed. A different template 30 is used depending on the type of the work W. That is, one side of the template 30 is formed in a plurality of notches 31 along the curvature of the work W. A plurality of (only three are shown in FIG. 1) clamping devices 40 are arranged on the base 10 in a direction perpendicular to the plurality of notches 31. The work W is locked by the positioning pins 11 erected on the base 10 and is clamped by the clamp device 40 as described later. In addition, as for the workpiece W, as a partial outline is shown by a two-dot chain line,
It is a long object extending in the longitudinal direction of the template 30.

FIG. 2 illustrates the clamping device 40. The clamp device 40 has a fixed block 42 fixed on a sub-base 41 and a movable block 43 movable on the sub-base 41 facing each other, and a pneumatic cylinder for moving the movable block 43 at the rear of the movable block 43. 44
Are connected via a rod 44a. The pneumatic cylinder 44 includes a bracket 41 fixed on the sub-base 41.
b from an air pressure source (not shown)
Air pressure is supplied via b. Therefore, rod 44
The movable block 43 is linearly slid on the linear way 41a via the line a.

The thickness of the sub-base 41 is set to a thickness that fits into the recess 23 formed between the shelf 21 of the block 20 and the surface of the base plate 10 described in FIG. That is, each clamp device 40 is inserted under the shelf 21 of the block 20 (see a broken line in FIG. 4).

The fixed block 42 and the movable block 43 which are components of the clamp device 40 will be further described with reference to FIGS. The fixing block 42 is formed on a convex portion 42 a that can be fitted into the notch 31 of the template 30 and an upper surface 42 b that sandwiches the work W, and is fixed on the sub-base 41. An edge of the upper surface 42b of the fixed block 42 facing the movable block 43 forms a claw 42c formed in an arc shape.

The movable block 43 has a guide portion 43a at the bottom.
And is slidable by the action of the pneumatic cylinder 44 by fitting into the linear way 41 a fixed on the sub-base 41. Further, the movable block 43 has an arc-shaped claw portion 43c for holding the work W in cooperation with the claw portion 42c of the fixed block 42.

Work W accompanying movement of movable block 43
A lever 45 is provided for pressing the lever. The lever 45 is made of two substantially Z-shaped plate members, and has one end sandwiching a block 41c fixed on the sub-base 41, and is rotatably locked by a shaft member 41d mounted on the block 41c. An intermediate portion of the lever 45 forms an elongated hole 45a, sandwiches the movable block 43, and is loosely fitted to a fixed pin 43d mounted on the movable block 43. Further, the other end is integrally connected with two plate members, and has a pin 45b covered with a rubber member at the tip.

Further, the pneumatic cylinder 44 of the sub-base 41
The sub-base 41 of the clamp device 40 is
A magnet holder 46 as a fixing jig for fixing the base to the base 10 is integrally mounted.

The operation of the positioning clamp device according to the present invention having the above-described structure will be described. As shown in FIGS. 1 and 4, the block 20 is fixed on the base 10, and the template 30 is positioned and locked on the block 20 by the guide pins 22. Next, one end of the sub base 41 of the clamp device 40 is inserted and fitted into the concave portion 23 formed in the space between the shelf 21 of the block 20 and the surface of the base 10. The vertical movement of the clamp device 40 is restricted, and the fixing block 42
Of the template 30 is inserted into the notch 31 of the template 30, and the movement of the clamp device 40 in the left-right direction is regulated, and the clamp device 40 is positioned. Work W
The required number of clamp devices 40 are positioned according to the size and shape of the clamp device 40, and then the magnet holders 46 of the respective clamp devices 40 are attracted to the base 10 to fix the respective clamp devices 40. The preparation for setting the work W is now completed.

Thereafter, the work W is placed on the upper surface 42b of the fixed block 42 of the clamp device 40 (FIG. 3), and the work W is aligned with the positioning pins 11 erected on the base 10 (FIG. 1). .

Next, the pneumatic cylinder 44 is actuated to push the movable block 43 via the rod 44a and to slide linearly on the linear way 41a so that the work W is moved to the claw portion 42c of the fixed block 42 and the movable block 43. Claw part 43c
(FIG. 4). Simultaneously, the lever 45 is slid with the shaft member 41d as a fulcrum and the elongate hole 45a as a point of force and rotated with the pin 45b as a point of action, thereby pressing the work W from above by the movement of the movable block 43. Here, since the claw portions 42c and 43c form an arc shape (FIG. 2), it is possible to cope with the difference in the curvature of the work W, and the pin 45b has its tip covered with an elastic rubber member. Therefore, errors in the thickness of the work W and dimensional errors in the apparatus can be absorbed and dealt with.

[0025]

As described above, according to the present invention, the clamping device is positioned by fitting the concave portion of the block and the template at a position along the curvature of the work W into the notch, and fixing the clamping device to the base. Is performed using a magnet holder, so that it is possible to easily cope with a work having a plurality of curvatures, and it is also possible to easily cope with various works having different curvatures by exchanging templates. In addition, the work clamp has a structure in which the horizontal direction is strongly pressed by the fixed block and the movable block, and the vertical direction is preliminarily pressed through the rubber member. The clamp device requires only one hydraulic cylinder, and is simple and inexpensive. can do.

[Brief description of the drawings]

FIG. 1 is a perspective view of a clamp device and a positioning device according to an embodiment of the present invention.

FIG. 2 is a perspective view of the clamp device according to the embodiment of the present invention.

FIG. 3 is a front view of a state before the clamping device and the positioning device according to the embodiment of the present invention clamp the work;

FIG. 4 is a front view of a state after the clamp device and the positioning device according to the embodiment of the present invention clamp the work;

FIG. 5 is a longitudinal sectional view according to an embodiment of the prior art.

FIG. 6 is a longitudinal sectional view according to another embodiment of the prior art.

[Brief description of reference numerals]

 Reference Signs List 10 base 20 block 23 concave portion 30 template 40 clamp device 41 sub base 41d shaft member 42 fixed block 42a convex portion 42b upper surface 42c claw portion 43 movable block 43a guide portion 43c claw portion 43d fixing pin 44 pneumatic cylinder 44a rod 45 lever 45a long hole 45b Pin 46 Magnet holder W Work

Claims (4)

[Claims] 1. A fixed block 42 fixed on a plate-shaped sub-base 41, and a movable block 4 disposed opposite to the fixed block 42 and cooperating with the fixed block to clamp a workpiece W.
3 and a pneumatic cylinder 44 connected to the movable block and linearly moving the movable block on the sub-base.
A substantially Z-shaped one end of which is rotatably locked to the sub-base, is loosely fitted to a shaft 43d having an elongated hole 45a provided in an intermediate portion fixed to the movable block, and presses the work at the other end. A clamp device comprising: a lever 45 having a shape; and a fixing jig 46 integrally connected to the sub-base. 2. A rectangular plate-shaped block 20 fixedly provided on the base 10 and having a concave portion 23; a sub-base 41 fitted on the concave portion 23 and disposed on the base 10; A plate-shaped template 30 mounted and detachably locked and provided with a plurality of cutouts 31 in accordance with the curvature of the work W;
, A fixing jig 46 integrally connected to the sub-base 41 and fixed to the base 10, and clamping the work W on the sub-base 41 in cooperation with the fixing block 42. A positioning device, comprising: 3. A pin 11 erected on a base 10 for positioning a work W, a square plate-shaped block 20 fixed on the base 10 and having a concave portion 23, and mounted and detached on the block 20 A plate-shaped template 30 arbitrarily locked and provided with a plurality of notches 31 in accordance with the curvature of the work W, a sub-base 41 fitted on the recess 23 and arranged on the base 10; A fixed block 42 fixed on the sub-base 41 and fitted to the notch 31; a movable block 43 disposed opposite to the fixed block 42 and cooperating with the fixed block to clamp the work W; And a pneumatic cylinder 4 for moving the movable block linearly on the sub-base 41.
4 and one end is rotatably locked to the sub-base 41, and a long hole 45a provided in an intermediate portion is loosely fitted to a shaft 43d fixed to the movable block 43, and the other end presses the work W at the other end. A positioning device, comprising: a substantially Z-shaped lever 45; and a fixing jig 46 integrally fixed to the sub-base 41 and fixed to the base 10. 4. The positioning device according to claim 2, wherein the base is made of a magnetic material, and the fixing jig of the clamping device is a magnet holder.