KR20220039316A - Wheelhouse processing method that enables process optimization by reducing the number of processes - Google Patents

Abstract

A wheelhouse processing method enabling process optimization through a reduction in the number of processes according to the present invention comprises: a step of preparing a wheelhouse steel plate for a vehicle; a step of completing the entire shape of a wheelhouse for a vehicle through a blanking process from the wheelhouse steel plate for a vehicle; a step of conducting a drawing process for the blanked wheelhouse for a vehicle; a step of performing a trimming/piercing process on the wheel house for a vehicle on which the drawing process has been performed; a step of performing a flanging/re-striking process on the wheelhouse for a vehicle on which the trimming/piercing process has been performed; and a step of continuously performing separation (SEP), burring, straight flanging, and restriking processes on the wheelhouse for a vehicle on which the flanging/restriking process has been performed. Through this, the burring, separation (SEP), and restriking processes performed over two processes are integrated into one process.

Description

Wheelhouse processing method that enables process optimization by reducing the number of processes

The present invention relates to a processing technology that enables process optimization by reducing the number of processes from 10 existing processes to 4 processes in the process of manufacturing a rear wheel house product through development of a rear wheel house mold.

Recently, in automobile parts, environmental regulations and driver safety are becoming major issues. Automakers are seeking the best possible driving experience while focusing on reducing carbon emissions, and suspension systems are essential to ensure a smooth and enjoyable ride by reducing noise and vibrations for the driver and passengers.

Suspension of a vehicle is a mechanism for supporting a wheel with respect to a vehicle body with appropriate rigidity in a direction other than up and down, and supporting it through a spring and a damping mechanism in the up-down direction. On the other hand, the path of road noise of the vehicle is transmitted in order of response through the source of excitation due to friction between the road surface and the tire, the path along the suspension, and the noise due to body vibration. A suspension tower is formed so that the rear suspension of the vehicle can be mounted on the wheel house when the damper and the spring are integrated. Further, in the rear suspension of a vehicle, when the damper and the spring are of a separate type, the spring is generally mounted to the rear side frame and the damper is mounted to the wheelhouse.

In general, the rear wheel house is configured to include a body integrally formed, a mounting bracket installed on one upper side of the body to which a shock absorber is mounted by welding, and a support bracket for supporting the mounting bracket, or on one upper side of the body It is installed and is configured to include a mounting bracket to which the shock absorber is mounted by welding, and support brackets that vertically support the left and right sides of the mounting bracket.

The rear wheel house is a product that supports the inside of the tire, which is the rear wheel of the car. According to the design, it is an exclusive part that supports the free space of the luggage room and the driver so as not to injure the driver when the rear part collides.

Such a rear wheel house usually consists of #50 process including drawing process, trimming/piercing process, flanging/restriking process, burring/restriking process, and separation/restriking process, thus increasing the cost of product development There are various problems such as problems, labor costs, etc., and the problem of expanding the scope of management.

As described above, the process of manufacturing the rear wheel house is a product having difficulties in the manufacturing process in which quality problems such as productivity problems and an increase in the defect rate frequently occur due to the complexity of multiple processes and the difficulty in forming the product structure shape. It is necessary to consider the inconsistency of the conditions of product development and the problem of moldability, and there are cases of defects caused by defective molding and mold design errors.

Design errors and structural parts of these vehicles can affect the production of finished vehicles, and in particular, the characteristics of the wheelhouse can affect the safety of the driver in the event of a rear-end collision, so it is necessary to develop parts that reflect this.

(Patent Document 1) KR10-1371480 B

The present invention is to solve the above conventional problems, and in the process of manufacturing the rear wheel house product, processes #10 to #50 for the LH side forming the rear wheel house and processes #10 to #50 for the RH side forming the rear wheel house # It is to provide a method that enables process optimization through process improvement and reduction in the number of processes from 10 processes including 10 to #50 to 4 processes including #10 to #40.

According to the present invention for achieving the above object, there is provided a wheel house processing method that enables process optimization by reducing the number of steps, comprising the steps of: preparing a wheel house steel plate for a vehicle; Completing the overall shape of the wheel house for a car through a blanking process from the steel plate for the car wheel house; Carrying out a drawing process for the blanked car wheel house; performing a trimming/piercing process on the wheel house for a vehicle on which the drawing process has been performed; performing a flanging/restriking process for the wheel house for a vehicle on which the trimming/piercing process has been performed; And a step of continuously performing a separation (SEP, separation), burring (burring), flanging (Straight flenging), and restriking (restriking) process with respect to the wheel house for a vehicle in which the flanging / restriking process has been performed. ; is characterized in that the burring (burring), separation (SEP, separation) and restriking (restriking) processes made over two processes are integrated into one process through this.

By applying the parting line on the LH side and RH side of the wheel house mold, twin type production is possible through a single mold.

Process optimization for forming a function hole and required shape used to configure the burring/restriking process and separation/restriking process constituting the rear wheelhouse manufacturing method according to the present invention as described above into one single process As a shortening technology applied by applying

That is, the present invention includes a drawing process, a trimming/piercing process, a flanging/restriking process, a burring/restriking process, and a separation/restriking process through each of the LH side mold and the RH side mold constituting the existing wheel house. 10 processes, each of 5 processes, are optimized into a total of 4 processes including drawing process, trimming/piercing process, flanging/restriking process, and separation/burring/flanging/restriking process through one mold make it

1 shows a wheel house processing step that enables process optimization by reducing the number of steps according to the present invention.
FIG. 2 shows modeling of simultaneously forming a wheel house having LH/RH using one steel sheet.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and the scope of the invention to those of ordinary skill in the art It is provided for complete information. In the drawings, like reference numerals refer to like elements.

According to the present invention, the wheel house processing method, which enables process optimization through reduction of the number of steps, is process #10 to #50 for the LH side constituting the existing rear wheel house and process #10 for the RH side forming the rear wheel house It is a key feature of improving the process and reducing the number of processes from 10 processes including to #50 to 4 processes including #10 to #40. In other words, it is to improve the Press Stamping Operation process so that problems do not occur in the wheel house product, including the review of the final function hole, shape, and matching part on the mold required for wheel house production.

Includes drawing, trimming (TR, trimming), piercing (PI, piercing), flanging (FR, flanging), restriking (RE, restriking), burring, separation (SEP, separation), etc. By integrating the burring, separation (SEP), and restriking processes that take place over two processes among the sequential press processes of to increase the efficiency of

Table 1 below shows information on the applied material of wheel house products having LH side and RH side.

parts information raw materials
information YS (Yield Strength)
Unit:Mpa
TS(min) El. (%) Remark Product Name YS
(min) YS
(max) (N/mm^2) kgf/㎟) (MPa) PANEL-RR W/H LH SPCEN /60/60
0.8T 140 280 270 2649 270 34% GI hot-dip galvanized steel PANEL-RR W/H RH

On the other hand, if the thickness of the material constituting the wheel house is 0.8t and the drawing depth is about 200mm or more, the product quality is greatly affected if the initial press method and lay-out are not optimized. In many cases, it is impossible to grasp the quality distribution of LOT characteristics that occurs in the future.

Hereinafter, a wheel house processing method that enables process optimization through reduction of the number of steps according to an embodiment of the present invention will be described with reference to FIG. 1 .

First, prepare a wheel house iron plate for automobiles, which is a metal plate material.

The entire shape is completed through the blanking process from the steel sheet of the wheel house for automobiles.

The blanking process proceeds through 3D laser cutting.

First, before proceeding with 3D laser cutting, prepare a wheel house mounting jig to mount the wheel house steel plate for automobiles. The wheel house mounting jig is manufactured in a shape having a plurality of supports to enable stable support for a wheel house iron plate for automobiles manufactured in a three-dimensional shape.

Next, vibration compatibility measurement is performed for 3D laser cutting application. In order to compensate for the vibration weakness of the 3D Laser-Cutting method, pre-vibration analysis is performed on the 3D Laser-Cutting installation line to prevent quality problems. For example, 3D type precision analysis, which is a vibration analysis in the three axes of X, Y, and Z, is performed. The 3D type precise analysis determines whether an unnecessary vibration peak occurs based on a preset upper limit of vibration. As a measurement standard, it is judged by whether an abnormal vibration peak occurs along the three axis directions of X, Y, and Z.

A drawing process is performed on the blanked wheel house steel plate for automobiles (#10). In the drawing process, the wheel house steel plate, which is a material with high plasticity, is dragged into the die to form a seamless structure without wrinkles or cracks.

Trimming (TR, trimming) and piercing (PI, piercing) processes are performed on the steel sheet of wheel house for automobiles that have undergone the drawing process (#20). The process proceeds through 3D laser cutting.

Next, the flanging and restriking process is performed (#30).

Flanging is a work of bending the end of the wheel house for an automobile, and it is classified into straight flanging, stretch flenging, and shrink flanging according to the shape of the bending line.

Restriking refers to the finishing work in which the deformed part is pushed and corrected in order to accurately measure the shape or dimensions of the product made in the previous process.

Finally, a separation (SEP), burring, straight flenging, and restriking processes are continuously performed through one process (#40).

Burring is a processing method in which a screw is formed after the iron plate is folded like a steel plate when the required thread does not come out due to the thin thickness.

On the other hand, the present invention consists of a twin type (double type) mass production system in which the LH side and the RH side constituting the wheel house are simultaneously produced. That is, the innovative process optimization according to 4 processes is applied to the existing LH Side/RH Side products, which are produced through the single type mold method, respectively, and at the same time, the LH Side/RH Side parting line is applied to make It is to propose a mold method that can be produced as a twin type (double type).

The present invention proposes an optimized product manufacturing method by changing the wheel house mold type, applying the LH Side/RH Side Partying Type mold method, increasing the cavity from 1 piece to 2 pieces, and improving the cycle time.

FIG. 2 shows modeling of simultaneously forming a wheel house having LH/RH using one steel sheet.

When analyzing the LH Side/RH Side single units that make up the wheel house, distortion of the product, which is abnormal behavior, occurs in some positions of the product. In the case of forcibly performing single-part analysis, since the mold file does not exist, abnormal phenomena such as dents, folds, and punctures continue to occur.

Since the original process is a form of simultaneous forming using one steel plate and cutting with LH/RH, LH/RH is considered as one product. Proceed with modeling by modifying one part.

As described above, the present invention includes processes #10 to #50 for the LH side forming the rear wheelhouse and processes #10 to #50 for the RH side forming the rear wheelhouse in the process of manufacturing the rear wheelhouse product It enables process optimization through process improvement and reduction of the number of processes with four processes including #10 to #40.

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

Claims (2)

preparing an automobile wheel house iron plate;
completing the overall shape of the wheel house for a car through a blanking process from the steel plate for the wheel house for the car;
Carrying out a drawing process for the blanked car wheel house;
performing a trimming/piercing process on the wheel house for a vehicle on which the drawing process has been performed;
performing a flanging / restriking process for the wheel house for a vehicle on which the trimming / piercing process has been performed; and
Separation (SEP, separation), burring (burring), flanging (Straight flenging), and restriking (restriking) with respect to the wheel house for a car in which the flanging / restriking process has been performed continuously performing the process; including,
Through this, characterized in that the burring (burring), separation (SEP, separation) and restriking (restriking) processes made over two processes are integrated into one process,
A wheel house machining method that enables process optimization by reducing the number of steps.
The method of claim 1,
By applying a parting line on the LH side and RH side of the wheel house mold, it enables twin type production through a single mold.
A wheel house machining method that enables process optimization by reducing the number of steps.

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