KR20000030860A - Method of making case of strut bearing using boards - Google Patents

Abstract

PURPOSE: A method for producing a strut bearing case is provided to continuously produce a board into a pipe shape strut bearing case with a presser and to mass-produce by simplifying a production process. CONSTITUTION: A producing method is composed of the steps of a piercing process(10) for forming a hole for making up a position of a steel board, a lance process(20) for forming two arcs on both sides, a pilot process(40) for making up a position of a board, an hour glass process(30) for cutting a space between the arcs into an hourglass shape, a drawing process(50) for sequentially molding into a container shape, a piercing process(60) for punching on the upper part of the container, a burring process(60) for pressing the edge of the hole into a circle to widen the punched hole, a flattening process(90) for spreading the twisted face of the container, a half-trimming process(90) for cutting the thickness of the contact part in the container and a re-striking process for completing the desired shape of a product by spreading the twisted end again.

Description

Method for manufacturing strut bearing case using plate {Method of making case of strut bearing using boards}

The present invention relates to a method for manufacturing a strut bearing case using a plate, and more particularly, to a manufacturing method for processing a pipe-shaped strut bearing case by pressing a plate with a press.

In general, the work is completed by cutting and press working, such as processing using a pipe.

However, the method of manufacturing a strut bearing case using such a conventional pipe has a problem in that the pipe is formed by a press machine and the end thereof is turned, so that the product cannot be continuously moved and a new process is performed again.

In addition, there are many difficulties in mass production because the number of processes and the continuous operation is difficult.

Accordingly, the present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a method for manufacturing a strut bearing case using a plate which continuously manufactures a pipe-shaped strut bearing case with a plate. It is.

Another object of the present invention is to provide a method for manufacturing a strut bearing case using a plate that can be mass-produced due to a simple manufacturing process.

The strut bearing case manufacturing method using the plate of the present invention for achieving the above object is a PIERCING process for forming a pilot hole (Pilot) to hold the position of the iron plate, and cut to form two arcs on both sides LANCE process, and HOUR GLASS process of cutting the front and the back, that is, between the arc and the arc in order to divide between the product and the product, and first forming the container shape sequentially, 2,3 DRAWING process, PIERCING process for drilling in the upper part of the container formed through the above process, BURRING process for pressing the edge of hole in cylindrical shape to widen the PIERCING base diameter, and upper part with small diameter in the process And the FLATTENING process of forming the lower end of the large diameter and extending the twisted surface of the container forming the stepped angle at the center boundary thereof, and the plate and the above Half trimming process that cuts two-thirds of the thickness of the contact with the container, RESTRIKING process to reshape the twisted ends and finalize the desired product shape, and separation process to separate the strut bearing case from the plate. There is no need to turn the end separately.

1 is a development view showing a strut bearing case manufacturing method using a plate of a preferred embodiment of the present invention,

Figure 2 is an illustration of one embodiment to obtain a wireless cutting shape in the flattening (Flattening) process, trimming (trimming) process in the strut bearing case manufacturing method using a plate of the present invention.

Explanation of symbols on the main parts of the drawings

10: Piercing process 20: LANCE process

30: HOUR GLASS process 40: Pilot process

50: DRAWING process 60: Piercing process

70: Burring process 80: Flattening process

90: trimming process 100: resriking process

110: strut bearing case

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a development view showing a strut bearing case manufacturing method using a plate of a preferred embodiment of the present invention, Figure 2 is a flattening (Flattening) process, trimming (trimming) in the strut bearing case manufacturing method using a plate of the present invention It is an illustration of one embodiment which calculates a wireless cutting shape in a process.

1 to 2, in the progressive mold method of forming a pipe by pressing the sheet steel sheet,

A piercing (PIERCING) process (10) for forming a hole for positioning the steel sheet; LANCE process 20 which cut | disconnects two arcs in both sides; Sand between the arc 20-1 and the arc 20-1, front and rear, to divide the product between the product and the pilot process 40 for positioning the plate. An HOUR GLASS process 30 cut into a clock shape; First, second, third, and fourth drawing (DRAWING) processes 50 of sequentially forming the container shape; A piercing (PIERCING) process (60) for drilling into the upper portion of the vessel formed through the above process; A burring process (70) for press-processing the edge of the hole into a cylindrical shape to widen the drilling tool; A flattening process (FLATTENING) process of forming a top of a small diameter and a bottom of a large diameter in the process and straightening the twisted surface of the container forming a stepped angle at a center boundary thereof; A half trimming process 90 for cutting the thickness of the contact portion between the plate and the container formed by the above two thirds; A rewriting process (RESTRIKING) process of refining the twisted end and finally finishing the desired product shape; It consists of a separation process that separates the strut bearing case from the plate.

First, the present invention is a invention in which a bearing case is manufactured from a generalized pipe method in a insulator front strut part by a press method to wirelessly cut both ends.

As a mold used as an automated means for press processing, a product is manufactured through a series of processing steps that are performed while supplying a thin metal plate made of a predetermined coil into the mold in a sequential transfer type to produce a product, and a separate process, that is, an end, is applied to the product. It is a new method of manufacturing bearing cases that do not require turning.

On the other hand, the PIERCING process (10) was to make a continuous working by drilling the iron plate, and to form a precise hole (Pilot Piercing) to hold the exact position of the mold during each process.

The LANCE process 20 is a process for pressing in the shape of a container by cutting in the shape of a good arc 20-1 on both sides of a plate as a work for pressing.

The HOUR GLASS process 30 is chamfered in the form of an hourglass to remove unnecessary parts to easily retract to form the shape of the container by perforating between products.

The 1,2,3,4 BRAWING process 50 is a process for forming the strut bearing case and is formed through the process of gradually forming a shape into the first, second, third, and fourth containers.

The PIERCING process 60 drills the top of the vessel without holes to form a hole in the pipe.

The burring process 70 is a process for widening the perforated tool formed on the upper end of the container, and does not need to turn its end.

The FLATTENING process 70 forms a small diameter upper portion and a large diameter lower end portion, forms a step angle at the center boundary line thereof, and flattens the twisted lower surface of the container.

In the trimming process 80, when the boundary between the plate and the container is half trimmed to 2/3 thickness and the bottom of the container is inclined at 45 ° angle (wireless turning), no additional turning is required (the angle is designed. Phase deformation is possible).

Next, the product is completed by the RESTRIKING process (90) for straightening the twisted end and the process of separating the strut from the plate.

Through this process, the plate is completed by producing the strut bearing case 110. Of course, the end of the finished strut bearing case does not have to be turned.

In the continuous production process, the completed strut bearing case

Formulas that do not need to be turned have been found and applied through a number of tests.

The FLATTENING process 80 is to produce the end of the bearing case by wireless cutting

The trim diameter can be set by applying an equation.

: Throttle cutting threshold : Inner diameter of strut end

Trim diameter θ: Basic angle of bending

value Product Status shape apply 70 or less Severe wrinkles Not applicable due to quality 71-80 Some wrinkles appear Some quality problem 81-85 Wrinkles appear in 4 directions Simultaneously consider mold life and products applied to this product 86-90 Almost no wrinkles Slightly affect the life of mold 91 ~ or more No wrinkle Particular attention should be paid to the selection and design of the molding parts.

In the preferred embodiment shown in Figure 2 the bending angle (θ) in the trim process of the present invention: 45, the inner diameter of the strut bearing case ( ): 42.1, Trim diameter ( ): 52.3

By expression

= (42.1 / 52.3) × 100 + (90 °-45 °) / 10

= 85

Limit value of the cordless line ( The value is determined so that it is included in the appropriate limit according to Table 1, so that the range does not affect the product and the mold. At this time, trim diameter ( ) Value is set so that no additional turning is required and the end is inclined.

According to the above formula, the FLATTENING process is used to produce the end of the bearing case by wireless cutting.

Apply the formula to the wireless line drawing threshold ( ), The inner diameter of the strut bearing case end ( ), Trim diameter ( ), The value of the basic angle (θ) of the bending can be set.

Knowing the diameter of the product in the above formula, it is also possible to find the trim diameter and the cordless drawing threshold in the reverse order.

On the other hand, it is possible to wireless cutting in the flattening process 80, the trimming process 90 during the flattening process, trimming process, the restring process in the above formula. It can be seen as a preparatory process.

For example, the present invention is not limited to the above-described embodiments, and a person skilled in the art without departing from the gist of the present invention claimed in the claims may be modified. Such changes are intended to fall within the scope of the present invention.

The present invention, as described through the above embodiment, is to produce a strut bearing case using a plate material, there is an effect that can be automated by a continuous process. In addition, since the end does not need to be turned separately, the production cost is low, and because the production per hour is large, there is an excellent effect that can be mass-produced is a very useful invention in the automotive parts industry.

Claims (2)

In the progressive mold method of pressing the iron sheet to form a pipe, A piercing process for forming a pilot hole for positioning the steel sheet; LANCE process which cut | disconnects two arcs in both sides; Cut the hole by the pilot process to hold the plate position, and cut the front and rear, ie between the arc and arc in the form of an hourglass to divide the product and the product. A HOUR GLASS process; First, second, third, and fourth drawing processes (DRAWING) step of forming a container sequentially; A piercing (PIERCING) step of punching the upper portion of the container formed through the above process; A burring process of pressing the edge of the hole into a cylindrical shape to widen the base diameter; A flattening process of forming a small diameter upper portion and a large diameter lower end portion in the process, forming a step angle at a boundary line at the center thereof, and extending the twisted surface of the container; A half trimming step of cutting two-thirds of the thickness of the contact portion between the plate and the container formed by the above; A method of manufacturing a strut bearing case using a plate material, comprising a reslicing process of refining a twisted end and finally finishing a desired product shape, and a separating process of separating the strut bearing case from a plate. The method of claim 1, wherein the FLATTENING process is to produce the end of the bearing case by wireless cutting Apply the formula to the wireless line drawing threshold ( ), The inner diameter of the strut bearing case end ( ), Trim diameter ( ), A method for manufacturing a strut bearing case using a plate, characterized in that the value of the basic angle (θ) of the bending can be set.