KR19980019949A - Car chassis frame bending mold - Google Patents

Abstract

The present invention relates to a mold for bending a chassis frame for a vehicle, the mold being used for bending a square tube pipe forming a chassis frame of a vehicle, wherein the square tube pipe is accommodated and rotated to have a predetermined curvature. And a clamp means for clamping the cam member having a predetermined shape for bending and clamping the square tube pipe received in the cam member to prevent the square tube pipe from being separated from the cam member. Provide a mold for frame bending.

Description

Mold for Bending Shasha Frame for Vehicle

The present invention relates to a vehicle chassis frame bending mold, and more particularly, to a chassis frame for a vehicle having a square tube-shaped pipe section, the chassis corresponding to the corner portion of the bus frame can be bent by the same curvature. It relates to a bending die.

As shown in FIG. 6, when round-processing a square tube pipe forming a chassis frame of a bus according to the prior art, an iron plate having a predetermined thickness (usually about 2.0-2.5 mm) is cut using a cutting machine. Blanking process using presses and molds as required for the process and pipe bending process, and formingmigating the half shape of the finished pipe product which is bent by using presses and molds. Process, trimming process by using press and mold to weld the end of the formed material, symmetrically joining the two processed materials and then primary welding, and protruding by welding Finishing process for primary grinding work, secondary welding process for welding straight material to rounded square tube material, and secondary welding Smoothing the protruding welded surface is to include a step of mapping the second grinding operation.

As described above, a lot of work processes are required to bend a square tube pipe forming a corner portion rounded out of the chassis frame of the bus, thereby increasing the cost of work by increasing work time and workforce.

In addition, since the curvature of the bending portion of the square tube life is slightly different for each product, there is a problem in that the competitiveness of the product is lost due to defective products.

Accordingly, an object of the present invention is to mold a vehicle chassis frame bending mold to improve the quality of the product by reducing the defect rate of the product by bending the rounded portion of the square tube pipe forming the chassis frame of the bus with the same curvature. To provide.

Another object of the present invention is to significantly reduce the cost cost by reducing the number of workers and simplifying the work process required for the round processing of the square tube pipe forming the chassis frame, thereby increasing the cost competitiveness of the vehicle chassis frame It is to provide a die for bending.

1 is an exploded perspective view of a mold according to the present invention.

Figure 2 is a schematic diagram of the initial state that the square tube pipe is supplied to the mold according to the present invention.

Figure 3 is a schematic view of the clamped state of the square tube pipe supplied to the mold according to the present invention.

4 is a schematic view of a state in which a rectangular tube pipe is bent by a mold according to the present invention.

5 is a schematic view of the clamper being released from the bent square tube pipe according to the present invention.

6 is a process flowchart when bending a rectangular tube pipe according to the prior art.

Explanation of symbols on the main parts of the drawings

10: die 11: cam member

12: square tube pipe 13: seating groove

14: first clamper 15: second clamper

16: Supporter 17: Mandril

The object of the present invention described above, in the mold used to bend the square tube pipe forming the chassis frame of the vehicle, the predetermined shape for receiving the square tube pipe and bending the square tube pipe at a predetermined curvature during rotation. And a clamp means for clamping the cam member and the square tube pipe received in the cam member to prevent the square tube pipe from being separated from the cam member. By providing.

According to a preferred feature of the present invention, the cam member has a seating groove for receiving the square tube pipe which is bent by the rotation of the cam member from the initial stage when the square tube pipe is clamped.

According to another preferred aspect of the present invention, the clamp means is installed so as to be movable in a direction perpendicular to the supply direction of the square tube pipe, the pressing to clamp the square tube pipe inserted into the seating groove of the cam member. It is provided with a first clamper and an initial state for crimping and supporting the square tube pipe inserted into the seating groove, and a second clamper for bending the square tube pipe clamped to the seating groove during rotation.

Another desirable feature of the present invention further includes an uneven portion formed in the seating groove to increase the ground pressure when clamping the square tube pipe.

Hereinafter, a preferred embodiment of the present invention will be described in detail according to the accompanying drawings.

1 is an exploded perspective view of a mold according to the present invention, Figures 2 to 5 is a view showing a step-by-step operation of bending a square tube pipe using the mold of the present invention.

As shown in the figure, the cam member 11 of a predetermined shape for bending the square tube pipe 12 at a predetermined curvature during rotation by a driving means not shown on one side of the upper surface of the die 10 is rotatably mounted. The cam member 11 has a seating groove 13 formed at a predetermined angle to receive the square tube-shaped pipe 12 which is bent and processed by the rotation of the cam member 11 from the initial time when the square tube-shaped pipe 12 is supplied and clamped. And, the uneven portion 13A is formed to increase the ground pressure when clamping the square tube pipe 12 in the seating groove (13).

The first clamper 14, which press-supports the square tube pipe 12 inserted into the seating groove 13 to one side of the cam member 11, moves in a direction perpendicular to the supply direction of the square tube pipe 12. The second clamper 15 is installed to be capable of bending the square tube-shaped pipe 12 clamped to the seating groove 13 at a predetermined curvature by the driving means, not shown, mounted on the die 10. The tubular pipe 12 is installed to be movable in a direction perpendicular to the supplied direction.

Reference numeral 16 is a supporter for supporting the square tube type pipe 12 when clamping the square tube type pipe 12 inserted into the seating groove 13 by the first and second clampers 14 and 15. It is a mandrel which supports the square tube pipe 12 supplied to the groove 13.

Referring to the bending working procedure of the square tube pipe corresponding to the round portion forming the chassis frame of the bus according to the present invention configured as described above, the square tube pipe which is cut by a predetermined length and then supported by the mandrel 17 ( 12 is supplied to the seating groove 13 of the cam member 11 to be in close contact with the supporter 16 (shown in FIG. 2), the first clamper 14 is driven by a die (not shown) by the driving means (not shown). Sliding movement along the guide rail (10A) of the first to the cam member 11 side advances and presses and supports the square tube pipe (12) by the pressing piece (14A) of the first clamper 14, and at the same time the second clamper ( 15) In addition, the pressing piece 15A of the second clamper 15 is seated in the cam member 11 as it slides along the guide rail 10B mounted on the die 10 and moves toward the cam member 11 side. Inserted into the (13) is to clamp the support by pressing the upper surface of the square tube pipe (12). At this time, the square tube pipe 12 accommodated in the seating groove 13 of the cam member 11 is the first, second clamper by the uneven portion 13A formed in the seating groove 13 (14) (15) As the ground pressure increases during clamping, accurate fixing is possible.

As shown in FIG. 4, as the second clamper 15 rotates at a predetermined angle in a state in which the second clamper 15 is clamped by the non-illustrated driving means built in the die 10 (at this time, the cam The member 11 is also rotated in the same direction as the second clamper 15) and the square tube pipe 12 inserted into the seating groove 13 of the cam member 11 is bent as a predetermined curvature.

As shown in FIG. 5, the first clamper 14 is retracted with respect to the cam member 11 along the guide rail 10A by the driving means, and the second clamper 15 moves the guide rail 10B. Accordingly, the retraction from the cam member 11 and then rotated toward the first clamper 14 to return to the initial position, the bending work process of the square tube pipe 12 is completed.

When bending the square tube pipe 12 with a predetermined curvature using the mold of the present invention as described above, the first step of cutting the square tube pipe 12 to a predetermined length and the cut square tube pipe 12 The work is completed by a second process of bending the cam member 11 and the first and second clampers 14 and 15 at a predetermined curvature.

As described above, the vehicle chassis frame bending mold according to the present invention has the advantage of significantly lowering the cost of work by reducing the work process and the number of workers to bend the square tube pipe forming the chassis frame of the bus to a predetermined curvature, When bending tubular pipes, the bending of the same curvature improves the quality of the product and enables mass production to lower the price and increase competitiveness.

Claims (4)

In the mold used to bend the square tube pipe forming the chassis frame of the vehicle, A cam member having a predetermined shape for accommodating the square tube pipe and bending the square tube pipe at a predetermined curvature during rotation; And clamping means for clamping the square tube pipe accommodated in the cam member to prevent the square tube pipe from being separated from the cam member. The vehicle chassis frame bending mold as set forth in claim 1, wherein the cam member includes a seating groove for receiving the square tube pipe that is bent to the round bottom of the cam member from the initial stage when the square tube pipe is clamped. . The method of claim 1, wherein the clamp means, the first clamper is installed so as to be movable in a direction perpendicular to the supply direction of the square tube pipe, the clamping and clamping the square tube pipe inserted into the mounting groove of the cam member; , Vehicle chassis frame bending for the vehicle, characterized in that it is installed in the initial state for crimping and supporting the square tube-type pipe inserted into the seating groove, the second clamper for bending the square tube-type pipe clamped in the seating groove during rotation; mold. The vehicle chassis frame bending mold of claim 2, further comprising an uneven portion formed in the seating groove to increase ground pressure when clamping the square tube pipe.