KR20180093314A - Variable jig for waterjet processing cfrp inner hood - Google Patents

Abstract

The present invention relates to a variable jig for waterjet processing a CFRP inner hood for various kinds of vehicles, comprising: X axis and Y axis driving systems controlled by a servo control system; and X axis driving system applied with an air slide, thereby automatically producing the CFRP inner hood for various kinds of vehicles.

Description

{VARIABLE JIG FOR WATERJET PROCESSING FOR CFRP INNER HOOD}

The present invention relates to a variable jig for water jet processing of various kinds of automotive CFRP inner hoods.

Waterjet processing technology is a processing technology that processes a workpiece by spraying water at high pressure.

The principle of water-jet technology is water erosion, which is common in nature. In other words, a technique using a phenomenon in which a workpiece is eroded by an impact caused by a high-speed water jet impacting a workpiece, and recently, a water jet with abrasives added to increase the cutting ability, The present invention is applicable to cutting and cutting of a substrate.

The water jet cutting device is basically divided into two parts, a high pressure generating device and an injection nozzle. The high-pressure generating apparatus is a device for pressurizing water at a desired pressure, and a pump for continuously pressurizing water at a pressure of 4000 bar or more is put into practical use. The injection nozzle has a function of changing high-pressure water into high-speed water jet. Injection nozzles are usually made of a carbide material such as sapphire or diamond, and the diameter of the injection nozzle is usually less than 1 mm.

The water jet cutting apparatus can be largely divided into a dry method in which an abrasive material is mixed with a water jet stream and a wet method in which an abrasive material is mixed with water in advance and sprayed.

On the other hand, hard-to-break materials are excellent materials with high mechanical properties such as high stiffness and light weight. However, they are classified as materials which are difficult to cut. Heat resistance, corrosion resistance and abrasion resistance such as titanium, inconel, aluminum alloy and carbon fiber reinforced plastic It means excellent material.

The demand for such hard materials is continuously increasing. As a result, the shape processing of hard materials is mainly dependent on the machining by the tools. As a result, there is a problem of lowering the machining workability such as frequent replacement of tools and short life span.

That is, when the hard material is machined, the tool wear is quick, the cutting temperature and the cutting resistance are large, the surface roughness is large, and the cutting chip fuses to the blade. Therefore, it is necessary to take into consideration various characteristics such as abrupt plastic deformation during machining, rapid abrasion of cutting tool and chemical reaction with tools depending on the material. For example, titanium and its alloys, which are called mysterious metals, are excellent in heat resistance, corrosion resistance and abrasion resistance, and thermal conductivity and electrical conductivity are lower than those of other metals. This happens easily. In addition, in the case of a metal having a large ductility such as brass, copper, aluminum and alloys thereof, the machinability is not good during machining, so that the surface roughness after machining becomes large, which makes it difficult to carry out precision machining.

In addition, in order to solve problems such as increase of processing cost, energy consumption, environmental pollution and low efficiency due to the use of excessive cutting oil in the conventional cutting process, it is required to minimize the cutting oil or to increase the processing efficiency without using cutting oil have. Particularly, since the high machining temperature generated in the machining of the hard material is a main cause of the decrease of the wear of the tool and the surface quality of the material, cutting fluids are mainly used for lowering the temperature. However, Odor, smoke, and bacteria are the factors that threaten workers' health and cause environmental pollution due to the disposal of cutting oil.

On the other hand, eco-friendly processing technology can be divided into development related to eco-friendly processing technology using dry processing or a very small amount of cutting oil and development of tools for eco-friendly processing.

Eco-friendly processing technologies include cryogenic processing technology using liquid nitrogen (-196 ° C), laser assisted machining technology, and minimum quantity lubrication processing technology.

Tool development includes development of tool materials, development of coatings with low coefficient of friction or lubrication.

U.S. Published Patent Application No. US 2009/0311944 A1 (published Dec. 17, 2009) PCT Published Patent WO2014 / 045030 A1 (published in 2014. 3.27)

As mentioned above, until now, the hard machining of the hard machining has been performed by using the expensive hard machining tool, resulting in a myriad of problems.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a variable jig for water jet machining that can process an automotive CFRP inner hood by water jet.

In order to solve the above problems, the present invention provides a variable jig for water jetting various types of automotive CFRP inner hoods, comprising: an X-axis and Y-axis drive system controlled by a servo control system; And a Z-axis drive system to which an air slide is applied. The present invention provides a variable jig for water jetting various types of automotive CFRP inner hoods.

As described above, the present invention provides a variable jig for water jet machining that can process a CFRP inner hood for an automobile by water jet.

This enables automatic production of various types of automotive CFRP inner hoods.

Particularly, the present invention can cut a difficult material in a non-contact manner without using a tool (contact type).

Further, according to the present invention, it is possible to secure the quality of the CFRP, which is a costly material, and to reduce the defect rate by the water jet machining technique, thereby improving the yield and securing diversity of the water jet processing technology.

Also, by replacing expensive cutting equipment according to the present invention, import substitution effect is expected, national cost reduction effect can be obtained, and competitiveness can be secured for automotive CFRP inner hood parts.

1 is a plan view of a rotary jig integrated type turntable for water jet machining for cutting difficult-to-cut materials according to an embodiment of the present invention;
Fig. 2 is a front view conceptual view of Fig. 1; Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention in the drawings, portions not related to the description are omitted, and like reference numerals are given to similar portions throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

FIG. 1 is a plan view and a side view of a variable jig for water jet processing of various types of automotive CFRP inner hood according to an embodiment of the present invention, and FIG. 2 is a front view conceptual view of FIG.

The present embodiment relates to various types of automotive CFRP parts, in particular, a variable jig for water jetting an inner hood.

Particularly, in this embodiment, various types of inner hoods can be water-jetted by moving in the X-axis, Y-axis, and Z-axis during water jet machining to cope with various types of CFRP inner hoods of different sizes and shapes for each vehicle type.

The driving of the X and Y axes is controlled by the servo control system. For driving the Z axis, the air slide is applied to smoothly mount and remove the product.

As a whole, the stand-type frame type was applied to the variable jig in consideration of the work convenience of the operator.

This variable jig is composed of linear module, servo control and air cylinder control system to form an automated module.

Particularly, when the model of the vehicle or inner hood is selected on the touch screen, the position of the four points is automatically determined and waterjet processing is performed.

On the other hand, the servo motors, LM rails and ball screws are applied to the X and Y axes to improve the positional accuracy of the X and Y axes.

In addition, the ball screw is subjected to symmetric movement by the left and right ball screws.

To prevent sagging of relatively long X-axis slides, the secondary slides are mounted in a gantry type.

The variable jig of the present embodiment is used for machining the CFRP inner hood for an automobile.

Particularly, this embodiment can be mainly used for processing the CFRP inner hood, which is a three-dimensional shaped rough material.

Water jet machining is no longer required for cutting fluid and corresponds to clean machining technology, and the present invention can be extended to automation technology of other machining processes such as laser cutting.

In addition, according to the present invention, water jet processing of CFRP inner hood for automobiles is expected to replace imported cost cutting equipment by replacing expensive cutting equipment, thereby achieving national cost saving effect and securing competitiveness of automobile parts.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the embodiments described above are intended to be illustrative, but not limiting, in all respects. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

Claims (1)

As a variable jig for water jet processing of various types of automotive CFRP inner hoods,
And a Z-axis drive system to which an air slide is applied, characterized by comprising: an X-axis and Y-axis drive system controlled by a servo control system; and a Z-axis drive system to which an air slide is applied. The variable jig.

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