JP5264012B2 - VEHICLE CROSS MEMBER HAVING MOUNTING HOLE AND ITS MOLDING METHOD - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a groove form member and a method for molding the member not individually requiring a metal die and capable of changing a web height without varying the position of a mounting hole or the like. <P>SOLUTION: In the groove form member having flanges (F) on upper and lower sides of the web (W) and setting the mounting hole or the like, a hole of the W surface is set so as to be divided to a: a hole of the dimension of an upper F surface reference and b: a hole of the dimension of a lower F surface reference and the dimensions of a and b are retained to constant levels regardless of a W height. In the molding method for the groove form member, the machining of a blank (B) for the groove form member comprises a stage (step) for machining a hole formed in a portion corresponding to the lower F and a hole formed at a dimension of the lower F surface reference after molding, a stage for feeding B in order to obtain a desired W height and a stage for machining a hole formed in a portion corresponding to the upper F and a hole formed at a dimension of the upper F surface reference after molding. In the former, the accurate machining of the mounting hole is possible, and in the latter, boring machining after the machining of B is not required and the cost of a metal die and a machining cost can be reduced. The groove form member having different W heights can be manufactured by the same die B, the reduction of the cost of the metal die is attained and the exchange of the metal die is not required. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

The present invention is cross member for a vehicle having a mounting hole or the like, for example, a vehicle cross member for frequently used in the chassis frame or the like of the track and its molding ones.

As shown in FIG. 10, the vehicle cross member constitutes a structural member for connecting the side members 2 and 2 'of the chassis frame 1 of the truck.

The vehicle cross member 3 shown in FIG. 10 supports the front part of the engine (3-1), supports the rear part of the engine and the transmission (3-2), and is provided in the middle of the chassis frame 1 ( 3-3), those provided near the rear suspension device (3-4), those provided near the rear of the chassis frame 1 (3-5), and the like.

The cross members 3-3, 3-4, and 3-5 shown in FIGS. 11 to 13 are generally used as the vehicle cross member , and 3-3 is an alligator type, 3-4, and 3-5. Is called a groove shape (U-shape), and 3-4 connects two cross member webs back to back and is connected to side members 2 and 2 'by gussets 4.

FIG. 8 shows details of the groove-shaped cross member shown in 3-4. The groove-shaped cross member 3-4 is integrally formed with a flange 3-4-2 on the upper and lower ends of the web 3-4-1. 3-4-3, and the web 3-4-1 is provided with holes 5 and pipes for weight reduction, and notches 6 for wiring, and upper and lower flanges 3-4-2, 3 -4-3 is formed with a smooth cutout 7 having a size that does not affect the strength, and further has attachment holes 8 and 9 for attachment to the side members 2 and 2 '.
In addition, as will be described later, the web 3-4-1 may be provided with holes for mounting components in addition to the hole 5 and the notch 6 for weight reduction.

  The height (cross-sectional height) of the web 3-4-1 of the cross member 3-4, that is, the distance from the upper surface of the upper flange 3-4-2 to the lower surface of the lower flange 3-4-3 is precisely It is necessary to use the upper and lower flanges 2a, 2b of the side member 2 (2 ′) to be assembled that are set to be the same or slightly smaller than the inner method (see FIGS. 9 and 11-13).

  When assembling such a cross member 3-4 to the side member 2 (2 '), as shown in FIG. 9, the side member 2 is such that the end of the cross member 3-4 faces inward at a predetermined position. Align the mounting hole 8 (9) with the hole 10 corresponding to the mounting hole 8 (9) of the cross member 3-4, which is inserted between the upper and lower flanges 2a, 2b of (2 ') and opened there, and rivets, etc. To the side member 2 (2 ').

  By the way, the side member 2 (2 ') needs to have several cross-sectional heights depending on the rigidity, durability strength, etc. required for the vehicle using the side member 2 (2'), and a cross that matches the height of the side member. Member 3-4 needs to be prepared.

  Sheet metal cross members are usually formed by punching from a blank with a blank mold. However, if the cross-sectional height is different, the blank shape will also be different. Equipment costs are incurred, and every time a cross member with a different cross-sectional height is manufactured, it is necessary to change the mold.

Therefore, as described above, the vehicle cross member 3-4 is required to have a large height, more precisely, a large distance from the upper surface of the upper flange 3-4-2 to the lower surface of the lower flange 3-4-3. For example, the following cross members have been devised that can cope with this at a low price.

  That is, (1) Japanese Patent Laid-Open No. 9-308923 discloses that a U-shaped slit is continuously formed over a predetermined length of a flat plate material, and then such a plate is perpendicular to the U-shaped slit. The present invention relates to a widening molding method for a channel-shaped plate member, which is formed in a channel shape by bending the widened molding method according to the first invention. A cross member comprising the second invention is shown, and both inventions can simultaneously save material and reduce the weight of a plate member or a decorative plate that does not apply a large force, and at the same time, a channel plate member such as a cross member. Can be made fresh with a different design from the conventional round holes.

  (2) Japanese Patent Laid-Open No. 2000-25646 discloses an end portion in the width direction of each of the first and second webs of the first member and the second member having a cross-sectional “L” shape and the same shape. A method of manufacturing a cross member by fastening them together with rivets and integrating them is shown, and the web height can be adjusted at a light weight and at a low cost.

  (3) In Japanese Patent Application Laid-Open No. 2005-178542, an L-shaped slide plate is attached to a web in the vicinity of both ends of a cross member so that the cross member can move up and down, and at least one of the upper and lower sides of the cross member is connected to the side through the plate. A cross member connected to the upper flange or the lower flange of the member is shown, and a cross member having a small cross-sectional height can be easily and reliably mounted according to the cross-sectional height of the side member. According to the company, processing costs can be greatly reduced.

  (4) Further, although this is not a cross member, Japanese Patent Application Laid-Open No. 2005-153810 discloses a hole formed in the upper and lower flanges and the web in the entire longitudinal direction of the side member as having the technical idea similar to the cross member. Among the hole groups classified according to use in the vertical direction of the cross section, the pattern including the vicinity of the vertical end of the cross section is shared by multiple models, and when processing the side member, the vertical direction of the side member blank A predetermined group of holes from one end to the other end is processed in advance, the blank feed pitch is changed according to the required length of the web of the side member, and then the remaining holes are processed and processed. The method of manufacturing the vehicle side member that cuts the part is shown, side members with different cross-sectional heights can be manufactured with the same blank mold, mold cost is greatly reduced, mold replacement is also possible Ku, is set to a high capacity utilization.

  However, the above (1) has low torsional rigidity because there are many holes (slits) that can be opened in the web, and the hole (slit) has a constant distance from the adjacent upper or lower flange, so that the height of the web is high. Each time the height changes, the pitch of the upper and lower holes changes, so that the mounting holes must be changed every time the height of the web changes in order to mount the same article at the same position.

  In (2) above, in order to keep the distance between the upper and lower flanges adjacent to the rivet hole for connecting the web constant, the position of the mounting hole must be changed every time the height of the web changes. However, there is a problem that the durability is lower than that of the monolithic structure due to the split structure.

  The above (3) has a problem that the web has a split structure, so that the durability is low and the flange surface is not continuous, so that the torsional rigidity is also low.

  In (4) above, since the criteria for setting the hole group is not clear, it is difficult to accurately maintain the vertical pitch of the component mounting holes on the web, and it is difficult to accurately share various hole groups in a plurality of vehicle types. Have difficulty.

JP 9-308923 A JP 2000-25646 A JP 2005-178542 A JP 2005-153810 A

The problem to be solved by the present invention is a vehicle cross member having mounting holes or the like that can change the web height (cross-sectional height) without requiring a mold individually and without changing the position of the mounting holes or the like. And providing a molding method thereof.

According to the present invention for solving the above-mentioned problems, in the vehicle cross member in which flanges are integrally formed on the upper and lower sides of the web so as to be coupled with the chassis frame and mounting holes are set, the holes to be set on the web surface are formed. A. A hole that can be drilled with a dimension relative to the upper flange surface; b. For vehicles having mounting holes or the like characterized in that they are divided into holes that are opened with dimensions based on the lower flange surface, and the dimensions a and b are kept constant regardless of the height of the web In the invention of the cross member and the processing of the blank for the cross member for a vehicle, the first is to process a hole to be drilled in a portion corresponding to the lower flange and a hole to be drilled with a dimension based on the lower flange surface after molding. And a second hole that is adjacent to the first stage at a predetermined interval and is formed in a portion corresponding to the upper flange and a hole that is formed with a dimension based on the upper flange surface after molding. The invention comprises an invention of a method for forming a cross member for a vehicle having mounting holes and the like, characterized by comprising a stage and a third stage for feeding a blank so as to obtain a required web height.

According to the present invention, in a vehicle cross member in which flanges are integrally formed on the upper and lower sides of a web to be connected to a chassis frame and mounting holes and the like are set, the holes to be set on the web surface include: a. A hole that can be drilled with a dimension relative to the upper flange surface; b. For vehicles having mounting holes or the like characterized in that they are divided into holes that are opened with dimensions based on the lower flange surface, and the dimensions a and b are kept constant regardless of the height of the web In the invention of the cross member and the processing of the blank for the cross member for a vehicle, the first is to process a hole to be drilled in a portion corresponding to the lower flange and a hole to be drilled with a dimension based on the lower flange surface after molding. And a second hole that is adjacent to the first stage at a predetermined interval and is formed in a portion corresponding to the upper flange and a hole that is formed with a dimension based on the upper flange surface after molding. a stage, since composed of a invention of molding of the cross member for a vehicle having a mounting hole or the like, characterized in that it consists of a third stage to send the blank to obtain the desired web height, the In the invention of the cross member for a vehicle having a biasing bore like, even when changing the web height of the cross member for the vehicle, a hole to be set in the web surface, a. A hole that can be drilled with a dimension relative to the upper flange surface; b. Since the holes are drilled with dimensions based on the lower flange surface, the dimensions of a and b are kept constant regardless of the height of the web. The vertical pitch of the holes can be kept constant, and there is an effect that accurate machining is achieved.

Further, in the invention of the method of forming a vehicle cross member having a mounting hole or the like, the hole can be processed by arbitrarily selecting whether the upper flange surface is used as a reference or the lower flange surface as a reference. Drilling after processing is unnecessary or few, and it is possible to reduce tool costs and press costs.

The cross member and its molding method for a vehicle having the mounting holes or the like of the present invention, the web height can be manufactured in different blank types crossmember same vehicle of (sectional height), except that the mold tool costs can be reduced In addition, it is not necessary to replace the mold from the press machine every time a cross member for a vehicle having a different web height (cross-sectional height) is manufactured, and the production efficiency can be improved by reducing the number of setup changes.

Furthermore, in the vehicle cross member according to the present invention, it is possible to manufacture a vehicle cross member having a different web height (cross-sectional height) without making many holes and dividing it as compared with the example shown in the reference. , Strength, durability and torsional rigidity are not reduced.

A preferred embodiment of the present invention will be described with reference to FIGS. 1 to 7. In the vehicle cross member 30 in which the flanges 32 and 33 are integrally formed on the upper and lower sides of the web 31 and the mounting holes 34 and the like are set, Holes 34 set in the surface of the web 31 are: a. A hole 34-1 that can be opened with a dimension based on the surface of the lower flange 33; b. A mounting hole or the like characterized in that it is divided into holes 34-2 that are opened with dimensions based on the surface of the upper flange 32, and the dimensions a and b are kept constant regardless of the height of the web 31. In the invention of the vehicular cross member 30 having the above and the processing of the blank 40 for the vehicular cross member 30, the hole 43-1 formed in the portion 43 corresponding to the lower flange 33 and the surface of the lower flange 33 after molding are used as a reference. With a dimension based on the first stage for machining the hole 34-1 to be drilled with the dimension, the hole 42-1 drilled in the portion 42 corresponding to the upper flange 32, and the surface of the upper flange 32 after molding It has a mounting hole characterized by comprising a second stage for processing the hole 34-2 to be opened, and a third stage for feeding the blank 40 so as to obtain the required height 41 of the web 41. Consisting of a molding of the cross member for a vehicle.

The embodiment shown in the drawings will be described in more detail. FIGS. 1 and 2 are cross members for a vehicle, which will be described as cross members 30A and 30B. FIG. 1 is a cross member having the lowest web height. 30A and FIG. 2 are half-cut front views of a cross member 30B of a type in which the height of the web is increased. Both of the webs 30A-1 and 30B-1 have holes 5 and pipes for wiring and wiring for weight reduction. The notch 6 is formed in the upper and lower flanges 30A-2 and 30B-2 with smooth notches (not shown), and mounting holes for attaching to the side members are formed.

  3 and 4 are half plan views showing the layout of the feeding process of the blanks 40A and 40B of the cross members 30A and 30B, respectively, and are configured to feed from right to left as indicated by arrows. In the figure, a two-dot chain line indicates a boundary (fold) between the upper and lower flange equivalent portions 42 and 43 and the web equivalent portion 41 in the blank 40.

  The strip-shaped steel plate having the required dimensions is sent from the right to the left in the figure, and is first opened in a portion 43 corresponding to the lower flange 33, and is surrounded by a line 43-1 (attachment hole to the side member) 9 and after forming. A first stage for processing the holes 11 and 12 (see FIG. 5) surrounded by the line 34-1 which is opened with a dimension based on the surface of the lower flange 33 is performed.

  Next, a wire that is opened in a portion 42 corresponding to the upper flange 32 and is opened with a dimension based on the hole (attachment hole to the side member) 8 surrounded by the wire 42-1 and the upper flange surface after molding. 2nd stage which processes the holes 13 and 14 enclosed by 34-2 is performed, and also the hole 5, the piping, the wiring notch 6, and the smooth notch 7 for the said weight reduction are formed, and also required A third stage is performed in which a blank is fed so as to obtain the web height.

  In the processing of the blank 40, the feed amount of the steel plate in the third stage is small in the one shown in FIG. 3, but in the one shown in FIG. 4, the feed amount is large depending on the height adjustment area in the web. And

  With respect to the cross member obtained by processing as described above, both the low web height 30A shown in FIG. 6 and the high web height 30B shown in FIG. The dimensions A and B up to the holes 13 and 14 and the dimensions C and D up to the holes 11 and 12 opened with the dimensions based on the lower flange 33 are not changed, but the height of the web shown in FIG. As a result, the dimension shown in e and f only fluctuates in the high 30B.

  The present invention can be applied not only to the cross member in the chassis frame of the truck but also to a building structure material.

  Moreover, even if the cross member is in the chassis frame of the track, if the present invention is applied to the above-mentioned allocator type, those with different widths in the front-rear direction can be manufactured with the same blank type, and the economic effect is high.

FIG. 2 is a half-cut front view of a cross member as a vehicle cross member according to the present invention and has a low web height. FIG. 2 is a half-cut front view of a vehicle cross member according to the present invention and has a high web height. FIG. 2 is a half plan view of a blank of a cross member for a vehicle according to the present invention, which has a low web height. FIG. 2 is a half-cut plan view of a blank of a cross member for a vehicle according to the present invention, which has a high web height. 1 is a half plan view of a blank of a cross member for a vehicle according to the present invention and shows a reference of a hole to be opened in the blank. The cross member for vehicles manufactured by this invention is shown, and a web height is low. 1 shows a cross member for a vehicle manufactured according to the present invention and has a high web height. It is a perspective view of the conventional general vehicle cross member. It is a perspective view which shows the state which assembles the cross member for vehicles of Drawing 8 to a side member. It is a top view which shows an example of the chassis frame for vehicles. It is an example of the cross member for vehicles used for FIG. It is another example of the cross member for vehicles used for FIG. FIG. 11 is still another example of the vehicle cross member used in FIG. 10. FIG.

1 Chassis frame, 2, 2 'side member, 2a, 2b side member flange,
3, 3-1, 3-2, 3-3, 3-4, 3-5, 30A, 30B cross member,
3-4-1 Web of cross member 3-4, 3-4-2 Upper flange of the cross member, 3-4-3 Lower flange of the cross member,
4 gussets, 5 holes for weight reduction, 6 cutouts, 7 large smooth cutouts,
8, 9 Mounting hole 10, 11, 12, 13, 14 Side member hole,
30, 30A, 30B Cross member for vehicle of the present invention,
30A-1, 30B-1, 31 web,
30A-2, 32 Upper flange, 30B-2, 33 Lower flange,
34, 34-1, 34-2, 42-1, 43-1 hole,
40, 40A, 40B blank, 41 web equivalent,
42 A portion corresponding to the upper flange 32, 43 A portion corresponding to the lower flange 33.

Claims (2)

In the vehicular cross member in which flanges are integrally formed on the upper and lower sides of the web to be coupled with the chassis member and mounting holes are set, holes to be set on the web surface are: a. A hole that can be drilled with a dimension relative to the upper flange surface; b. For vehicles having mounting holes or the like characterized in that they are divided into holes that are opened with dimensions based on the lower flange surface, and the dimensions a and b are kept constant regardless of the height of the web Cross member . In the processing of the blank for the vehicle cross member , a first stage for processing a hole drilled in a portion corresponding to a lower flange and a hole drilled with a dimension based on a molded lower flange surface; A second stage that processes a hole that is adjacent to the first stage at a predetermined interval and that is formed in a portion corresponding to the upper flange and a hole that is formed with a dimension based on the upper flange surface after molding; A method for forming a cross member for a vehicle having mounting holes and the like, characterized by comprising a third stage for feeding a blank so as to obtain a web height.

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