JPS6250282A - Shaping method for material for frame side member - Google Patents

Abstract

PURPOSE:To easily vary the flange width of a product after bending work by dividing a material in the longitudinal direction in the first process and cutting only the kick-down part and the taper part in the second process. CONSTITUTION:A member is cut in the longitudinal direction and separated into a blank 1a and a blank 1b in the form of the turned blank 1a by 180 deg. in the first process. In each blank 1a, 1b, the undersurface of the kick-down part 3 of a side member and the parallel part 2 as the center part are shaped. Then, in the second process, the part shown by the oblique lines is cut having the parallel part 2 of the blank as standard plane, and the upper surface of the kick-down part 3 and the tapered part 4 are shaped, and the side members 1a' and 1b' are formed. Then, the side members 1a' and 1b' are bending-worked in the direction of width, and a frame side member having the section in U-form is shaped.

Description

Detailed Description of the Invention Industrial Field of Application Truck Chassis Frame Prior Art Small truck chassis frame 1 Due to the cab tilt, the front end is often completely lowered; Take or send as shown in Figure 3,
Cut and remove the shaded part.

Problems to be Solved by the Invention Since the shaded areas in FIGS. 2 and 3 are discarded as scrap, it is necessary to make the shaded areas as small as possible.

The only way to solve the problem is to perform a blank 7-no-zo rate by combining side members in opposite directions.

action We will collect fees to reduce the amount of scrap generated.

In the first step (blank separation) shown in Example FIG.

Next, in the second step shown in FIG. 1(b), the hatched portion is cut out to create site 9 members lα', 16''r.

Side member t b' is side member 1 a' is 1
The shape is rotated by 80°.

In addition, since the second step is to make cut earrings, blank I
a and 1b do not have to be the same size, and the 7 lunge width of the product can be changed by changing the width of the material.

Effects of the invention One step compared to conventional material removal (Planck separation) f
By adding i- and taking two pieces, the amount for lowering the front end of the side member 〇 can be taken from a part of the rear end taper, and the waste of material taking 9 is reduced.

The second step is cutting vias, so by changing the width of the material, it is possible to change the flange width of the product, allowing for specification separation.

[Brief explanation of the drawing]

FIGS. 1A and 1B show the first and second steps of the present invention. Figures 2 and 3 show the conventional method (/(), where one piece is picked up and sent out. 1α, 1b...Blank, 1a', 1b'...Side member agent, patent attorney Shigefumi Okamoto Figure 1 Figure 2 Figure 3 Procedural amendment October 14, 1985 Director General of the Japan Patent Office Michibu Uga 1, Indication of the case 1985 Patent Application No. 189484 2, Name of the invention Frame Method for obtaining materials for side member materials 3. Relationship between the person making the amendment and the case Patent applicant (628) 1 person other than Mitsubishi Motors Corporation 4. Agent (voluntary) 5. Date of amendment order Showa 1920, month, day (Date of shipment)
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tshi njA H i - Akira
Detailed document 1, Title of the invention Method for taking material of frame side member material 2, Claims Kick-down part lowered from the center part and provided at the front end and tapered part provided at the lower surface of the rear end and tapered at the rear end In the first step, the material is cut and separated in the length direction, the shape of the center part and the lower surface of the kickdown are molded, and the two blanks are mutually separated by K 180. A method for preparing a 7-frame side member material, which comprises forming the material by changing its orientation, and then cutting out the blank in a second step to make a mold of the top surface shape of the kickdown part and the shape of the taper part. 3. DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for removing material from a side member material before bending a seven-frame side member used in a truck chassis frame. Conventional technology In small trucks, the front end of the chassis frame is often provided with a kick-down part formed in a lowered shape to secure space for storing the cab tilt mechanism. Generally, it is widely practiced to form a tapered portion on the lower surface of the end portion to make the rear end tapered and to reduce the weight. When removing the side member material used to manufacture such a chassis frame, conventionally, one-piece cutting as shown in Figure 2 or feeding as shown in Figure 3 is carried out to remove the shaded area. The method used was to cut and remove it. Problems to be Solved by the Invention However, FIG. 2 shows a case where a side member member of a chassis frame having a kickdown portion as described above is taken out using such a conventional method. As shown in FIG. 3, there are many diagonally shaded areas below the center of the side member play that are discarded as scrap, which has the disadvantage of poor material yield. In order to improve yield performance, it is necessary to reduce the amount by which the kickdown portion is lowered, which is disadvantageous in that the degree of freedom in design is greatly restricted. Furthermore, in the conventional material extraction method as shown in Figures 2 and 3, the width of the side member material to be taken out is set in advance and the process is carried out, so the width of the side member material to be taken out can be changed to change the width of the side member material to be taken out. If an attempt is made to change the 7-rank width, there is an inconvenience that the process settings must be changed significantly. Means for Solving the Problems The present invention has been devised in view of the above, and its gist is that the kickdown part is lowered from the center part and is provided at the front end, and the kickdown part is provided on the lower surface of the rear end and lowers the rear end. In a method for making a frame side member material having a tapered part, in the first step, the material is cut and separated in the length direction to form two blanks in which the central part shape and kickdown lower surface shape are molded. A method for preparing a frame side member material is characterized in that the blanks are formed with their orientations changed by 1800 degrees, and then in a second step, the blank is cut out to form a mold of the top surface shape of the kickdown part and the shape of the taper part. According to the present invention, scraps are generated by cutting only the molding of the upper surface of the kickdown portion and the tapered portion, and material removal with less scrap generation is realized. Embodiment In the first step (blank separation), the plate material supplied in the form shown in FIG. 1b. The blanks ia and ib are the kickdown portion 3 of the side member material.
The shapes of the lower surface and the parallel portion 2 serving as the central portion are molded. Next, in the second step shown in Fig. 1←), using the parallel part 2 of the blank as a reference plane, the diagonally shaded part is cut out, the top surface of the kickdown part 3 and the tapered part 40 are removed, and the side member materials 1a' and lb' are make. At this time, side member material 1b' is side member material 1
A/ is taken out in a shape rotated by 180°. Incidentally, in the second step, a so-called cut piercing operation is performed in which the above-mentioned diagonally shaded portion is cut out and holes are also punched in the required areas at the same time. That is, in the eleventh second step, two side member materials are taken from the plate material in such a way that the lowering of the kickdown portion 3 provided at the front end is offset by the lower taper portion 4 at the rear end. be. Thereafter, the side member materials 1a', lb' are bent in the width direction to form a frame side member having a U-shaped cross section. Note that in the second process, cutting and drilling are performed using the parallel part 2 of the blank as a reference plane, so the width of the material is changed and the first
Even if the width of the blank formed in the process changes, the second process can be carried out without significantly changing the process settings, and side member materials with different widths can be easily formed.
ξ can be created, and the flange width of the product after bending can be easily changed by changing the width of the plate material. Effects of the invention 17 steps compared to conventional material collection (blank separation)
By adding and making two pieces, the part of the lowered front end of the side member material can be removed by partially removing the rear end taper, which reduces wasted material removal and has the effect of reducing dripping. The first step is to cut the material almost lengthwise and divide it into two parts, and the second step is to cut out only the kickdown part and the tapered part, so by changing the width of the material, , it is possible to easily create side member materials with different widths, and it is also possible to easily change the flange width of the product after subsequent bending processing, and it is possible to easily make out of specification and change specifications. 4. Brief explanation of the drawings FIGS. 1A and 1B are explanatory diagrams showing the first and second steps of the present invention. FIGS. 2 and 3 are explanatory diagrams showing one-piece picking and feeding in the conventional method. la, lb...blank, la', lb'...
- Side member material, 2...Parallel part, 3...Kickdown part, 4...Tapered part.

Claims (1)

[Claims] A method for removing material for a frame side member, characterized by sequentially cutting a frame side member in one direction and a frame side member in the opposite direction in combination.