KR101185713B1

KR101185713B1 - Roller style mandrel for square pipe bending

Info

Publication number: KR101185713B1
Application number: KR1020100042806A
Authority: KR
Inventors: 송재열; 조현덕; 최성종
Original assignee: (주) 지.에이 테크; 주식회사 금창
Priority date: 2010-05-07
Filing date: 2010-05-07
Publication date: 2012-09-24
Also published as: KR20110123367A

Abstract

The present invention relates to a roller-type mandrel for rectangular tube bending, and more particularly, the direction in which the rectangular tube is bent when bending a rectangular tube used in various shapes such as a hanger arm connected to a trunk lid of an automobile in an arbitrary shape and It is an object of the present invention to provide a roller-shaped mandrel for rectangular tube bending configured so that both sides can be bent without depression or deformation.
Roller type mandrel for rectangular tube bending according to the present invention for achieving the above object is to form a round end of the square rod and the support is installed to move a certain angle by the shaft pin on both sides, the roller between the support shaft shaft pin It is characterized in that the present invention is configured to move or configure the support rod is formed in the rounded end of the square bar to move a certain angle by the center shaft pin, the roller is installed on both sides of the support by moving the shaft pin,
According to the present invention as described above, since the tip of the square bar constituting the mandrel is formed in a round, and the roller is rotated by the support, the bending part is supported at two points during the bending operation There is no need to precisely adjust the speed, and because the roller rotates, there is an effect of improving the workability and productivity by reducing the friction and fast during bending work,
In addition, it can be bent while maintaining the shape of the bent direction, side, and corner of the rectangular tube, so it is expected to improve the quality of the bent products used in the trunk lid hanger arm of automobiles or various mechanical devices. It is an invention to become.

Description

Roller style mandrel for square pipe bending

The present invention relates to a roller-type mandrel for rectangular tube bending, and more particularly, the direction in which the rectangular tube is bent when bending a rectangular tube used in various shapes such as a hanger arm connected to a trunk lid of an automobile in an arbitrary shape and A roller-shaped mandrel for rectangular tube bending configured to be able to bend without both sides being depressed or deformed.

As is well known, the rectangular tube is used to be bent in an arbitrary shape according to the purpose of the hanger arm connected to the trunk lid of the vehicle or various mechanical mechanisms, and bends when the rectangular tube is bent in an arbitrary shape. Depression occurs.

As described above, the mandrel is used in order to prevent a phenomenon in which the depression occurs in the bending direction when the rectangular tube body is bent in an arbitrary shape according to the use.

By the way, as shown in Figure 1, the mandrel has the same outer shape as the inner space of the square tube body, and the tip portion is formed in a round.

Since the mandrel 100 configured as described above is composed of a rounded tip only as a rectangular bar, the bending part of the mandrel should be precisely matched with the bending point of the rounded part of the mandrel.

However, when the mandrel was inserted into the square tube, the exact position could not be adjusted when the mandrel was moved to match the bent portion of the square tube.

If the bending portion of the rectangular tube and the round portion, which is the tip of the mandrel, do not match, the mandrel may not function, and thus the depression occurs in the bending direction when the rectangular tube is bent. In the barrel, there are many problems in the structure of the mandrel, such that it is impossible to bend the rectangular tube body at various angles, thereby narrowing the range of application to various machine parts.

The roller-type mandrel for rectangular tube bending according to the present invention is to solve the above problems, and comprises a roller and a support configured to be movable at the tip of the mandrel at two points when inserting and bending the rectangular tube. By supporting the inner surface of the rectangular tube, it is possible to bend while preventing the bending of the rectangular tube, and to provide a roller-type mandrel that can bend quickly by not having to precisely adjust the bending part. There is this.

Roller type mandrel for rectangular tube bending according to the present invention for achieving the above object is to form a round end of the square rod and the support is installed to move a certain angle by the shaft pin on both sides, the roller between the support shaft shaft pin It is characterized in that the present invention is configured to move or configure the support bar is formed by the rounded end of the square rod and the movement of a certain angle by the center shaft pin, the roller is installed on both sides of the support to move the shaft pin.

According to the present invention as described above, since the tip of the square bar constituting the mandrel is formed in a round, and the roller is rotated by the support, the bending part is supported at two points during the bending operation There is no need to precisely adjust the speed, and because the roller rotates, there is an effect of improving the workability and productivity by reducing the friction and fast during bending work,

In addition, it can be bent while maintaining the shape of the bent direction, side, and corner of the rectangular tube, so it is expected to improve the quality of the bent products used in the trunk lid hanger arm of automobiles or various mechanical devices. It is an invention to become.

1 is a perspective view showing the configuration of a conventional mandrel
Figure 2 is a roller type perspective view installed on both supports of the mandrel according to the present invention
Figure 3 is a roller type perspective view installed on the center support of the mandrel according to the present invention
4 is a cross-sectional view coupled to the roller-type square tube installed on both supports of FIG.
5 is a cross-sectional view coupled to the roller-type square tube installed in the center support of FIG.
Figure 6 is an exemplary view showing a state of use of the mandrel according to the present invention

Hereinafter, with reference to the accompanying drawings in detail with respect to the configuration of the roller-shaped mandrel for the square tube bending as follows.

Figure 2 is a roller type perspective view installed on both supports of the mandrel according to the present invention, Figure 3 is a roller type perspective view installed on the center support of the mandrel according to the invention, Figure 4 is a roller type installed on both supports of Figure 2 5 is a cross-sectional view of the mandrel coupled to the square tube, and FIG. 5 is a cross-sectional view of the roller-type mandrel installed on the center support of FIG. 3 coupled to the square tube, and FIG. 6 is an exemplary view showing a use state of the mandrel according to the present invention.

The roller-shaped mandrel for the square tube bending according to the present invention is configured as a square rod type to be inserted into the inside of the square tube.

A screw hole 10 for connecting the rod is formed at the rear of the square bar, and the front end portion is formed in a round shape, and a seating groove on both sides has an arcuate seating jaw 4 'around the shaft pin hole 6 on the side of the round portion. After forming (4), install the support (3) using the seating groove (4), the support has the same arc-shaped with both ends in close contact with the arc-shaped seating jaw (4 ') and the support (3) The shaft pin 5 is inserted into the shaft pin hole 6 so as to penetrate, and the support 3 is installed to move about the shaft pin 5.

On the opposite side of the shaft pin (5) of the support (3) by using another shaft pin (2) to install the roller (1) between the support (3) to rotate, the diameter of the roller (1) is roller (1) It is configured to have a diameter equal to the inner surface distance of the rectangular tube facing the outer surface of the.

In another embodiment, as shown in Figures 3 and 5, the front end of the square rod is formed in a round, forming a seating groove 4 in the middle to support the support (3) by a certain angle by the shaft pin (5),

The roller (1) on both sides of the support (3) is installed by moving the shaft pin (2).

In the drawings, reference numeral 40 denotes a rectangular tube and 41 denotes a mandrel.

Referring to the operation of the roller-shaped mandrel for the square tube bending of the present invention configured as described above in detail.

By using a known bending machine for bending the rectangular tube 40 using the roller-shaped mandrel 41 for the rectangular tube body bending according to the present invention, description of the operation of the bending machine will be omitted.

First, the mandrel is inserted into the square tube body 40 so that the roller 1 constituting the mandrel 41 is positioned at a portion to be bent in the square tube body.

In this state, when the rectangular tube body is bent by a known bending machine, the roller 1 constituting the mandrel 41 comes into contact with the inner surface of the bent portion of the rectangular tube body and is rubbed, whereby the roller 1 rotates. Since the friction is minimized to reduce the pressing force required for bending, the rectangular tube is bent while maintaining the same cross-sectional shape.
In the bending process, the support (3) acts while the arc of the rear end is in close contact with the arc-shaped seating jaw (4 '), so that the stress received by the support (3) at the time of bending the arc-shaped seat (5) and the mandrel arc-shaped seating jaw Since the 4 'is distributed and accepted, the support 3 rotates smoothly to maintain the bending action.

Since the roller constituting the mandrel is installed on the support 3, the roller 1 rotates about the shaft pin 2, and at the same time, the support 3 moves about a certain angle about the shaft pin 5. Since the tip of the mandrel is round, the round part and the roller (1) part, i.e., at the two points, Will support the inner surface.

Therefore, the bending portion of the rectangular tube can be prevented from being recessed as a result of broadly supporting the bent portion of the square tube without moving the mandrel tightly.

In addition, in the case of the mandrel configuration in which the rollers 3 are installed on both sides with the center of the support connected to the tip of the square tube forming the mandrel,

In particular, since the roller can be bent in a state where the roller is in close contact with both sides of the square tube, the side and the corner can be prevented from being recessed.

1: roller
2,5: shaft pin
3: support
4: settling groove
4 ': arcuate seating jaw
6: shaft pin ball

Claims

In the mandrel is composed of a square rod type is inserted into the inside of the square tube to bend the square tube, the end portion is formed in a round while the screw hole 10 for connecting the rod is formed at the rear of the square rod,
After forming a seating groove 4 having an arc-shaped seating jaw 4 'centering on the shaft pin hole 6 on the side of the round part of the tip, the support 3 is installed using the seating groove 4. The support 3 has the same arc shape in which both ends are in close contact with the arc-shaped seating jaw 4 ', and the support pin 3 is inserted into the shaft pin hole 6 so as to penetrate the support. 5) to be able to rotate around
On the opposite side of the shaft pin (5) of the support (3) to install the roller (1) using another shaft pin (2) so that the roller can rotate, the diameter of the roller (1) is a square that the outer surface of the roller abuts Roller type mandrel for rectangular tube bending, characterized in that configured to have a diameter equal to the inner surface distance of the tube.

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