JPH04143089A - Boring method for box-shaped structural parts - Google Patents

Abstract

PURPOSE:To prevent the infiltration of cut pieces into box-shaped structural parts by holding a falling preventive member by means of a clamping device, then cutting the remaining cutting part of the box-shaped structural parts by a laser beam or plasma machine. CONSTITUTION:The cutting start point set on a processing route is irradiated with a laser by the laser beam machine 3 to start the boring of the box-shaped structural parts 1. The laser beam machine 3 moves along the processing route while the machine cuts the front surface of the box-shaped structural parts 1. The laser beam machine 3 is once stopped and a wire 2 is clamped by the clamping device 4 when the machine approaches again the cutting start point. The laser beam machine 3 is then released and the remaining processing route on the front surface of the parts 1 is cut. The wire 2 is welded and joined to the cut piece 5 cut from the parts 1 and this wire 2 is held clamped by the clamping device 4 and, therefore, there is no possibility that the cutting piece 5 falls into the box-shaped structural parts 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for processing box-shaped structural parts, such as automobile door parts, using a laser or plasma processing device.

[Prior Art] For example, automobile door parts generally have a box-shaped structure, and holes are formed on the inner panel side of the door parts for attaching accessory parts such as handles and window regulator handles.

By the way, when processing door parts like this,
Conventionally, there is a press mold for forming door parts according to the car model or specification side, and the holes for attaching accessory parts are made using the press mold at the stage of the sheet material before it is formed into a box-shaped structure as a door part. Komei was processed by a mold.

[Problems to be Solved by the Invention] Recently, as the types and specifications of automobiles have increased, the locations of Komei have also become more diverse depending on the type of vehicle or specifications.

Therefore, if Komei was processing each car model or specification using a press mold as before, there would be problems such as an increase in the space to store processed door parts for each car model or specification. There is.

Therefore, basic processing and forming parts are performed, and after assembling a car with unprocessed parts for processed parts by car model or specification, the assembled parts are processed according to the car model or specification. A method was needed.

This means that drilling is also required for machining, and for example, machining of holes corresponds to the installation of the inner panel side to which accessory parts of door parts are attached. In other words, after the door parts are assembled into the car without machining the holes, the inner panel side for attaching the accessories of the door parts depends on the model or specification of the car. It became necessary to process the holes.

However, since the press molds conventionally used can only process metal plate materials, it is not possible to process the inner panel side of door parts after they have been assembled into an automobile.

Therefore, it was considered to process the holes using laser or plasma processing equipment.

This laser or plasma processing device irradiates or injects a laser or plasma onto a metal plate to locally form through holes, and sequentially moves the irradiation or injection position of the laser or plasma to process the metal plate. It is processed by cutting into a predetermined shape.

However, when Komei processes a box-shaped structural part, such as an automobile door part, using a laser or plasma processing device located above it, the cut pieces cut from the box-shaped structural part I fell inside,
There was a problem in that it was difficult to remove the cut piece.

Therefore, when a box-shaped structural part is machined using laser or plasma processing equipment, a processing method is required that prevents the cut pieces from entering the inside of the box-shaped structural part. became.

Therefore, an object of the present invention is to provide a method for machining a box-shaped structural part without entering the cut pieces into the inside of the box-shaped structural part when processing the box-shaped structural part using a resa or plasma processing device. This is what I am trying to do.

[Means and Effects for Solving the Problems] The present invention includes a step of joining a fall prevention member to a predetermined position of a box-shaped structural component to be processed, and a step of forming the box-shaped structural component into a predetermined shape using a laser or plasma processing device. a step of holding the fall prevention member with a clamp device immediately before cutting the box-shaped structural component into a predetermined shape using a laser or plasma processing device; and a step of holding the fall prevention member with a clamp device and then cutting the box-shaped structural component into a predetermined shape. The method is characterized by comprising a step of cutting the remaining cut portion with a laser or plasma processing device.

Therefore, since the perforation is held by the clamp device via the falling prevention member, there is no possibility that the cut piece cut from the box-shaped structural component will enter the inside of the box-shaped structural component.

[Example] An embodiment of the present invention will be described below with reference to the drawings.

For example, when cutting the top surface of a box-shaped structural part such as an automobile door part into a predetermined shape using a laser processing device (described later), first, when cutting the top surface of the box-shaped structural component into a predetermined shape, the laser processing The coordinates of the processing path along which the laser beam irradiated by moves on the upper surface of the box-shaped structural component are input into a control unit (not shown) in the laser processing apparatus.

As shown in FIG. 1, a wire 2 as a fall prevention material is welded to approximately the center of the inside of the machining path on the top surface of this box-shaped structural component 1 using an automatic welding device (not shown), and the wire is cut. Cut to appropriate length using a device (not shown).

Next, as shown in FIG. 2, the laser processing device 3 irradiates the laser beam onto the cutting start point set on the processing path, and the drilling of the box-shaped structural component 1 begins.

The laser of this laser processing device 3 moves along the processing path while cutting the top surface of the box-shaped structural component 1, and when it approaches the cutting start point again, the laser processing device 3 is temporarily stopped, and as shown in FIG. As shown in FIG. 2, the wire 2 is clamped by the clamping device 4.

Next, as shown in FIG. 4, the temporary stop of the laser processing device 3 is released and the remaining processing path on the top surface of the box-shaped structural component 1 is cut, and when the cutting start point is reached again, Komei finishes processing. do.

At this time, the wire 2 is welded to the cut piece 5 cut from the box-shaped structural component 1 by the laser processing device 3, and the wire 2 is clamped by the clamp device 4. ing. That is, since the cut piece 5 is held by the clamp device 4 via the wire 2, there is no possibility that the cut piece 5 will fall into the inside of the box-shaped structural component 1.

Above, we have described the drilling of the top surface of a box-shaped structural component using a laser processing device, but this can also be applied to a plasma processing device, and can also be applied to the sides and slopes of a box-shaped structural component.

Therefore, it is possible to process a box-shaped structural component assembled as a product even from the direction by using a laser or plasma processing device.

[Effects of the Invention] As detailed above, according to the present invention, when a box-shaped structural component is processed by a laser or plasma processing device, a box-shaped structural component can be produced in which cut pieces do not enter inside the box-shaped structural component. Drilling of mold structure parts can provide a processing method.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Fig. 1 shows a box-shaped structural part with wires welded to predetermined positions, and Fig. 2 shows a box-shaped structural part cut into a predetermined shape by a laser processing device. Figure 3 shows the wire held by a clamp device,
FIG. 4 is a diagram showing the remaining cut portions cut using a laser processing device. DESCRIPTION OF SYMBOLS 1... Box-shaped structural component, 2... Wire, 3... Laser processing device, 4... Clamp device, 5... Cut piece. Applicant's representative Patent attorney Takehiko Suzue Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] A step of joining a fall prevention member to a predetermined position of a box-shaped structural component to be drilled, a step of cutting the box-shaped structural component into a predetermined shape using a laser or plasma processing device, and a step of cutting the box-shaped structural component into a predetermined shape using a laser or plasma processing device. Immediately before cutting the mold structural component into a predetermined shape, the fall prevention member is held by a clamp device, and after the fall prevention member is held by the clamp device, the remaining cut portion of the box type structural component is cut by the laser or 1. A method for drilling holes in a box-shaped structural component, comprising the step of cutting with a plasma processing device.