KR20190006700A - Apparatus for clamping of jig - Google Patents

Abstract

According to the present invention, an apparatus for clamping of a jig to maintain a fastening state of first and second jigs for preventing a gap between the first and second jigs during a process of applying heat to the first and second jigs to cure a composite material contained in the first and second jigs comprises: a hydraulic cylinder fastened to the first jig; and a clamping bar having one end fastened to the hydraulic cylinder and the other end fastened to the second jig so that the clamping bar is lifted by the hydraulic cylinder and maintaining a position of the second jig bonded to the first jig since hydraulic pressure supplied to the hydraulic cylinder is maintained. The apparatus may improve the reliability of manufacturing composite materials and have the effect of preventing muscular skeletal disease of a worker.

Description

[0001] APPARATUS FOR CLAMPING OF JIG [0002]

The present invention relates to a clamping device for a tool, and more particularly, to a clamping device for a tool for maintaining a clamped state of a tool so as to prevent a gap between two tools during a process of applying heat to the tool to cure the composite, To a clamping device.

Among the methods for producing the composite material for aircraft, there is a method of containing the composite material in the interior of the two tools and curing the composite material by applying heat to the two tools. During the composite hardening process, the fastening state of the two tools must be maintained firmly. Therefore, a clamping device for a tool is used to firmly hold the fastening state of the two tools until the composite hardening process is completed.

1 is a view illustrating a clamping device for a tool according to an embodiment of the present invention.

Referring to FIG. 1, the clamping device for a tool according to the related art uses bolt fastening. That is, the left screw 21 is fastened to one of the two tools 11 and 12, the right screw 22 is fastened to the other, and a turnbuckle 30 is fastened to the two screws 21 and 22 And the distance between the two screws 21 and 22 is adjusted by rotating the turnbuckle 30 to adjust the distance between the two screws.

However, since the bolt fastening method requires the operator to rotate the turnbuckle by using a separate tool, there is a problem that it takes a lot of force and causes the worker's musculoskeletal diseases.

2 is a view showing a clamping device for fixture according to another embodiment of the present invention.

Referring to FIG. 2, a clamping device for a tool according to another embodiment of the present invention uses a link-type cylinder. That is, a hinge is provided outside the cylinder 40 and the clamping force of the two tools 11 and 12 is maintained as the operator rotates the clamping bar 60 installed to rotate around the hinge 50.

However, there is a problem that the link type cylinder system must consider the turning radius of the clamping bar 60, the size of the equipment is large, and maintenance due to the complexity of the hydraulic hose is difficult.

Korean Registered Patent No. 1277826 (Announced on Mar. 21, 2013)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a clamping device for a tool for maintaining the fastening force of a tool with a simple structure and for the convenience of the operator.

In the present invention in which the first and second fixtures are held in a state in which the first and second fixtures are heat-sealed to prevent a gap between the first and second fixtures during a process of curing the composite material contained in the first and second fixtures, The clamping device for the tool may further comprise a hydraulic cylinder coupled to the first tool and one end fixed to the hydraulic cylinder and the other end fixed to the second tool to be lifted and lowered by the hydraulic cylinder, And a clamping bar for holding the position of the second fixture connected to the first fixture as it is held.

Wherein the hydraulic cylinder includes a piston rod having a first hydraulic oil path for supplying hydraulic pressure and having a threaded portion formed at a lower end thereof for engagement with the first tooling hole, a piston rod integrally formed with the piston rod, And a second hydraulic oil passage communicating with the first hydraulic oil passage and opening downward. The cylinder head is disposed below the piston head and moves downward with respect to the piston head as the hydraulic pressure is supplied through the second hydraulic oil passage. A cylinder head restrained by the cylinder and moving down with the cylinder, and a spring disposed between the piston head and the cylinder head to lift the cylinder head when the oil pressure is released.

The clamping device for a tool may further include a position fixing nut coupled to the threaded portion to maintain a position of a fixing bracket fastened to the first tool.

The cylinder head may have a coupling groove into which the clamping bar is inserted, and a coupling protrusion inserted into the coupling groove may be formed at one end of the clamping bar.

When the hydraulic pressure is released and the cylinder head is restored to its original position, the coupling groove can be opened to the front and rear so that the clamping bar can be detached.

And a second coupling protrusion inserted into the clamping groove is coupled to the other end of the clamping bar, and the second coupling protrusion is coupled to the second tooling hole at a height of the second tooling hole And may be screwed to the other end of the clamping bar so that the position of the clamping bar may be varied at the other end of the clamping bar.

INDUSTRIAL APPLICABILITY The clamping device for a tool according to the present invention has a simple structure and firmly holds the fastening force of a tool, thereby improving the reliability of manufacturing a composite material.

Further, since the clamping device for a tool according to the present invention provides a convenience of an operator, it is possible to prevent a musculoskeletal disease of a worker.

1 is a view illustrating a clamping device for a tool according to an embodiment of the present invention.
2 is a view showing a clamping device for fixture according to another embodiment of the present invention.
3 is a cross-sectional view showing an installation state of the clamping device for fixture according to the present embodiment.
4 is an exploded perspective view showing a clamping device for fixture according to the present embodiment.
5 is a cross-sectional view showing an unclamping state of the clamping device for fixture according to the present embodiment.
6 is a cross-sectional view showing a clamping state of the clamping device for fixture according to the present embodiment.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms and the inventor may appropriately define the concept of the term in order to best describe its invention It should be construed as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are only examples of the present invention, and are not intended to represent all of the technical ideas of the present invention, so that various equivalents and modifications may be made thereto .

Hereinafter, a clamping device for a tool according to the present invention will be described with reference to the accompanying drawings.

FIG. 3 is a cross-sectional view showing the mounting state of the clamping device for fixture according to the present embodiment, and FIG. 4 is an exploded perspective view showing the clamping device for fixture according to the present embodiment.

3 and 4, the first clamping hole 11 is formed with a first clamping groove 11a for connecting the piston rod 110 and the clamping bar 200 is connected to the second clamping hole 12. [ A second clamping groove 12a may be formed. The first clamping groove 11a and the second clamping groove 12a may be coaxial with each other.

The clamping device 100 for a tool according to the present embodiment may include a hydraulic cylinder 100 and a clamping bar 200.

The hydraulic cylinder (100) is fastened to the first tool (11). One end of the clamping bar 200 is fastened to the hydraulic cylinder 100 and the other end is fastened to the second tooling hole 12. The clamping bar 200 may be raised or lowered depending on whether the hydraulic cylinder 100 is supplied with the hydraulic pressure.

That is, the hydraulic cylinder 100 may include a piston rod 110, a piston head 120, a cylinder 130, a cylinder head 140, and a spring 150.

The piston rod 110 may be provided in a cylindrical shape. A thread may be formed at the lower end of the piston rod 110. The lower end of the piston rod 110 is fastened to the first tool hole 11 and its position is fixed. In order to firmly maintain the position of the piston rod 110, a position fixing nut 111 may be fastened to the piston rod 110. A first hydraulic fluid path 113 may be formed in the piston rod 110. A hydraulic pressure supply line 101 for supplying hydraulic pressure may be fastened to the lower end of the piston rod 110.

The piston head 120 is integral with the piston rod 110 and can have a larger outer diameter than the piston rod 110. Thus, the piston head 120 may protrude from the upper end of the piston rod 110. The piston head 120 may be provided with a second hydraulic oil path 121 communicating with the first hydraulic oil path 113 and opening downward.

Since the piston rod 110 is fastened to the first tool hole 11 and the piston head 120 is integrated with the piston rod 110, the piston rod 110 and the piston head 120 are positioned .

On the other hand, the cylinder 130 has the same outer diameter as the piston head 120 and can have an inner diameter that is in contact with the piston rod 110. The cylinder 130 is disposed below the piston head 120. When the hydraulic pressure supply line 101 is coupled to the lower end of the piston rod 110 and the hydraulic pressure is supplied, the hydraulic pressure supplied through the first hydraulic oil passage 113 and the second hydraulic oil passage 121 is transmitted to the piston rod 120 So that the cylinder 130 can move downward.

The cylinder head 140 is fastened to the outer diameter portion of the cylinder 130 and extends upward of the piston head 120. Therefore, the cylinder head 140 can move down with the cylinder 130.

The spring 150 is supported on the piston head 120 and resiliently supports the cylinder head 140. After releasing the hydraulic pressure, the spring 150 exerts an elastic force upward to lift the cylinder head 140. As the cylinder head 140 is raised, the cylinder 130 can be lifted together with the cylinder head 140.

A first coupling protrusion 210 may be formed at a lower end of the clamping bar 200 and a second coupling protrusion 220 may be coupled to an upper end of the clamping bar 200. A coupling groove 141 into which the first coupling protrusion 210 is inserted may be formed at an upper end of the cylinder head 140 in correspondence with the first coupling protrusion 210. [ At this time, it is preferable that the binding groove 141 is opened backward and forward to easily separate the clamping bar 200 from the binding groove 141 after the clamping is released. A thread is formed on the upper end of the clamping bar 200 and a second coupling protrusion 220 is formed on the upper end of the clamping bar 200 As shown in Fig.

Hereinafter, the operation of the clamping device for a tool according to the present invention will be described with reference to the accompanying drawings.

5 is a cross-sectional view showing an unclamping state of the clamping device for fixture according to the present embodiment.

Referring to FIG. 5, in order to clamp the first and second tooling holes 11 and 12, the operator clamps the hydraulic cylinder 100 to the first tooling hole 11. That is, the worker inserts the lower end portion of the piston rod 110 into the first clamping groove 11a. The worker fixes the position of the piston rod 110 by fastening the position fixing nut 111 below the first clamping groove 11a.

As the position of the piston rod 110 is fixed, the piston rod 110 and the piston head 120 are coupled to the first tool hole 11, and the position of the piston rod 110 is not varied.

The user adjusts the position of the second coupling protrusion 220 according to the distance between the coupling groove 141 and the second clamping groove 12a and then the first coupling protrusion 210 is inserted into the coupling groove 141 And the second coupling protrusion 220 is inserted.

The first and second tooling holes 11 and 12 can be connected to each other by the hydraulic cylinder 100 and the clamping bar 200. [

In the above description, the hydraulic cylinder 100 is fastened to the first tool hole 11 and then the clamping bar 200 is fastened to the second tool hole 12. However, The clamping bar 200 and the hydraulic cylinder 100 may be jointly connected to the first and second tooling holes 11 and 12 together.

The composite material is accommodated between the first and second tooling holes 11 and 12 while the first tooling hole 11 and the second tooling hole 12 are connected to each other.

6 is a cross-sectional view showing a clamping state of the clamping device for fixture according to the present embodiment.

Referring to FIG. 6, in the process of curing the composite material contained in the first and second tooling holes 11 and 12 by applying heat to the first and second tooling holes 11 and 12, The hydraulic pressure supply line 101 is fastened to the lower end of the piston rod 110 and then the hydraulic pressure is supplied to maintain the fastened state of the first and second tooling openings 11 and 12 so as to prevent a gap.

As the hydraulic pressure is supplied, the hydraulic pressure acts on the cylinder 130 through the first hydraulic oil passage 113 and the second hydraulic oil passage 121, and the cylinder 130 moves downward. As the cylinder 130 moves downward, the cylinder head 140 moves down together with the cylinder head 140 and the clamping bar 200 moves downward.

Therefore, the second tooling (12) is in close contact with the first tooling (11), and when the oil pressure is maintained, the fastening force between the first tooling (11) and the second tooling (12) can be maintained.

Thereafter, when the curing process of the composite material is completed, the hydraulic pressure is released. When the hydraulic pressure is released, the spring 150 exerts an elastic force toward the cylinder head 140, and the cylinder head 140 moves upward. As the cylinder head 140 moves upward, the cylinder 130 moves upward together with the cylinder head 140, and the clamping bar 200 is lifted from the second tooling hole 12.

When the clamping state of the first and second tooling holes 11 and 12 is released as described above, the composite material can be drawn out from the first and second tooling holes 11 and 12.

As described above, the clamping device 100 for a tool according to the present embodiment has a simple structure and can firmly hold the fastening force of the two tools 11, 12. Therefore, the clamping device 100 for a tool according to the present embodiment can improve the reliability of manufacturing a composite material and can provide a convenience of a worker, thereby preventing a worker's musculoskeletal disease.

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art will be able to modify the technical idea of the present invention in various forms. Accordingly, such improvements and modifications will fall within the scope of the present invention as long as they are obvious to those skilled in the art.

11: first tooling hole 11a: first clamping groove
12: second tooling hole 12a: second clamping groove
100: Hydraulic cylinder 110: Piston rod
120: piston head 130: cylinder
140: cylinder head 150: spring
200: clamping bar 210: first binding protrusion
220: second binding protrusion

Claims (6)

A plurality of first and second tool holders for holding a clamping state of the first and second tool holders so as to prevent a gap between the first and second tool holders during a process of applying heat to the first and second tool holders to cure the composite material accommodated in the first and second tool holders, In the apparatus,
A hydraulic cylinder coupled to the first tool;
And the other end is fastened to the second tool and is lifted and raised by the hydraulic cylinder, and as the hydraulic pressure supplied to the hydraulic cylinder is maintained, the position of the second tool, which is joined to the first tool, And a clamping bar for holding the clamping bar. The method according to claim 1,
The hydraulic cylinder
A piston rod in which a first hydraulic oil path for supplying hydraulic pressure is formed and a threaded portion for fastening with the first tool is formed at a lower end;
A piston head integrally formed with the piston rod and protruding from the piston rod, the piston head communicating with the first hydraulic oil path and having a second hydraulic oil path opened downward;
A cylinder disposed under the piston head and performing a downward movement with respect to the piston head as hydraulic pressure is supplied through the second hydraulic oil path;
A cylinder head restrained by the cylinder and moving down with the cylinder;
And a spring disposed between the piston head and the cylinder head to lift the cylinder head when the hydraulic pressure is released. 3. The method of claim 2,
Further comprising a position fixing nut for holding a position of a fixing bracket fastened to the screw portion and fastened to the first tool hole. 3. The method of claim 2,
Wherein the cylinder head is formed with a coupling groove into which the clamping bar is inserted,
Wherein one end of the clamping bar is formed with a first coupling protrusion inserted into the coupling groove. 5. The method of claim 4,
Wherein when the cylinder head is restored to its original position by releasing the hydraulic pressure, the coupling groove is opened to the front and rear sides so that the clamping bar can be detached. 5. The method of claim 4,
A clamping groove into which the clamping bar is inserted is formed in the second tool hole,
A second coupling protrusion inserted into the clamping groove is coupled to the other end of the clamping bar,
The second coupling protrusion
And the clamping bar is screwed to the other end of the clamping bar so that the position of the clamping bar can be varied at the other end of the clamping bar according to the height of the second tooling hole.

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