JPS61186141A - Enlarged flange part working method and its device - Google Patents

Abstract

PURPOSE:To form easily the flange part having bigger thickness with a simple device by adding the load in the right angles direction with the thickness of a plate material on the end part of the plate and by forming a flange part by enlarging the thickness of the end part. CONSTITUTION:The processing device to form the flange part 14 expanding to the end part of the leg part 12 of a plate material is composed of the plural dies 18, 20 which are movable from the preforming position P upto the main forming position M and to pinch the leg part 12 of the plate, the reserve holder 40 to have the preforming recessed part 48 of gimlet shape corresponding to the plate material 26 projected from the dies 18, 20 which are in the state of close contact at the reforming position P, the preforming punch 50 to preform into the preforming recessed part 48 with pressing in the right angles direction of the thickness the end part of the plate 26 projecting from the dies 18, 20 at the preforming position P, the main forming holder 56 to have the enlarged head part forming recessed part 58 corresponding to the preforming part 10A projected from the dies 18, 20 at the main forming position M and the holder 56 to form to the enlarged head part forming recessed part 58 with pressing in the right angles direction of the thickness the preforming part 10A projected from the dies 18, 20 at the main forming position M.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an enlarged flange processing method and apparatus for forming a flange that is thicker than the legs.

[Background Art] In general, engineering-type or H-shaped cross-sectional materials in which the head portion is thicker than the leg portions need to be manufactured by extrusion molding, roll molding, or the like.

However, with this manufacturing method, the manufacturing equipment is large-scale, and although it is possible to manufacture straight-shaped materials such as steel sections and rails, it is possible to manufacture curved materials such as when forming an enlarged brim at a bowl-shaped entrance. It is impossible to produce such materials. For this reason, the bowl-shaped entrance portion is generally bent only outward or inward by bending.

The present invention has been made in consideration of the above-mentioned facts, and an object of the present invention is to provide an enlarged flange processing method and apparatus that can form a flange with an enlarged wall thickness using a simple device.

[Summary of the Invention] In the enlarged flange processing method according to the present invention, a load is applied to the end of the plate material in a direction perpendicular to the wall thickness, and the wall thickness of this end is expanded to form the flange. .

Therefore, it is possible to simply and easily form the enlarged flange portion without requiring large-scale equipment such as extrusion molding or roll molding.

Further, the enlarged flange processing device according to the present invention is an enlarged flange processing device that forms an enlarged head at the end of a plate leg, and is movable from a preforming position to a main forming position and clamps the plate leg. a plurality of dies, a preform holder having a conical preform recess corresponding to the plate material protruding from the die at the forming position; a preforming punch for preforming into the preform recess by pressing in the direction perpendicular to the thickness; a main forming holder equipped with an enlarged head forming recess corresponding to the preform protruding from the die at the main forming position; It has a main forming punch that presses the preformed part protruding from the die at the main forming position in a direction perpendicular to the wall thickness to form the enlarged head forming recess.

Therefore, it is possible to simply and easily form the enlarged flange portion without requiring large-scale equipment such as extrusion molding or roll molding.

[Embodiment of the Invention] Figs. 1 to 11 show an enlarged flange processing device to which this embodiment is applied, and Fig. 12 shows an anchor fitting 10 manufactured according to this embodiment. has been done. As shown in FIG. 12(F), this anchor metal 310 has a structure that integrally has a relatively thin leg portion 12 and a relatively thick enlarged collar portion 14 formed at one end of this leg portion 12. can be,
- As an example, this anchor fitting 10 is used to movably lock an occupant restraining webbing of an automobile seat belt device to a vehicle body.

The enlarged flange processing device to which this embodiment is applied is shown in Figs.
As shown in FIG. 3, a pair of dies 18.
20 is accommodated, and the tip of a guide rod 22 having one end fixed to the die 18 can be inserted into and extracted from the through hole 24 of the die 20, so that the dies 18 and 20 can be moved toward and away from each other. These dies 18,20 have recesses 28 for receiving the workpiece 26 between them in contact.
is formed on the die 20.

Furthermore, these dies 18 and 20 are movable within the guide table 16 from the preforming position CP) to the main forming position (M). Means may be provided for guiding the movement of this die 18,20. Note that the recess 28 accommodates the base of the plate-shaped processed material 26 with the die 18, 20 in close contact with it, and allows a portion of the base to protrude.

A knockout pin 33 whose tip can protrude toward the contact surface passes through the die 18.20, and the processed material is discharged when the die 18.20 is separated by the operation of a drive device (not shown). There is.

The knockout pin 33 is attached to the guide stand 16 with die 18.20.
A long hole 32 is formed for guiding during movement.

Above the guide table 16 are lifting blocks 34 corresponding to the dies 18 and 20 at the preforming position (P) and the main forming position (M).
．． 35 is arranged so that it can be moved up and down from the state shown in FIG. 1 to the state shown in FIG. 4 by driving a drive means (not shown).

A case 36 is fixed to this lifting block 34, and a suppression block 38 is fixed to the inside of this case 36. Further, a holder 40 is held in the case 36, and the amount of protrusion from the case 36 can be changed by a predetermined length. The amount of relative movement of the holder 40 with respect to the case 36 is such that the pin 42 fixed to the inner circumference of the case 36 is
until it comes into contact with a notch 44 formed on the outer periphery of.

Therefore, in the state shown in FIG.
The holder 40 is in a state where it protrudes the maximum amount from the holder 40, and the holder 40 can be inserted into the case 36 until the bottle 42 comes into contact with the opposite side of the notch 44. Moreover, since this holder 40 has an elastic body 46 interposed between it and the pressing block 38,
It is biased in the direction of protruding from the case 36.

The protruding tip of the holder 40 has a preformed recess 48 arranged around the protruding tip of the workpiece 26 as shown in FIG. 5 when the lifting block 34 is in the lowered state. This preformed recess 48 is designed to form a preformed head 10A, which has a substantially triangular shape as shown in FIG. 2, into a part of the leg 12 when viewed from the width direction of the workpiece 26.

A punch 50 is arranged at the axial center of the holder 40,
It is movable relative to the holder 40 in the vertical direction in FIG. In the state shown in FIG. 2, the punch 50 has moved in the direction of maximum protrusion with respect to the holder 40, and from this state it can move in the direction of entering the inside of the holder 40, that is, upward in FIG. .

This punch 50 comes into contact with the pressing block 38 and receives a downward pressing force in FIG. It has the role of forming into

Above the main molding position MM is a lifting block 35 and a case 52.
is fixed, and the suppression block 5 is inserted into this case 52.
4. It has a holder 56.

A main molding recess 58 corresponding to the enlarged flange 14 is formed at the tip of the holder 56 .

Next, the processing procedure of the enlarged flange portion using this embodiment will be explained.

As shown in FIGS. 1 to 3, the dies 18 and 20 are placed at the preforming position P, and the dies 18 and 20 are brought into close contact to sandwich the base of the workpiece 26.

In this case, the processing material 26 is prepared in advance from FIG. 12(A) to
As shown in (D), a blank material 26 is formed from a flat plate material 26A through a punched material 26B whose outer diameter is blanked, a material 26C which has an embossed material 60, and a material 26 after being bent.

Here, the lifting block 34 is lowered, and the driving force of the lifting block 34 is transmitted to the holder 40 via the elastic body 46, as shown in FIG.
8 holds the protruding tip of the workpiece 26. Here, if the lifting block 34 is further lowered, the suppression block 38 will also lower the punch 50, so the punch 50 will be attached to the holder 40.
The preform head 10A (see FIG. 2(E)) is formed in the preform recess 48 by applying pressure in a direction perpendicular to the wall thickness to the tip of the workpiece 26.

The lifting block 34 is raised, the die 18.20 is moved to the main molding position M as shown in FIGS. 6 and 7, and the lifting block 35 is lowered.

As a result, the holder 56 molds the preformed head 10A into the main molding recess 58 to form the enlarged flange 14.

When the lifting block 34 rises again, the anchor fitting 10 with the enlarged collar 14 formed at the tip of the leg 12 is completed, and the die 18.20 is opened and the anchor fitting 10 is removed from the die 18.20 by the knockout pin 33. let

Next, FIGS. 13 to 15 show the manufacturing procedure of the anchor fitting 10 to which the second embodiment is applied. In this anchor fitting 10, the enlarged flange portion 14 protrudes to both sides of the leg portion 12, and the protrusion dimensions W and W2 are different (Wl < W2). To this end, during preforming, the preformed head 10A is shaped to have slopes on both sides of the leg portions 12, and the respective slope angles are 01,
The inner peripheral angle of the preformed recess 48 may be determined so that θ2 is a different angle (θ1 minus θ2).

Note that the above embodiment is applied to the case where the present invention manufactures an anchor fitting for a seat belt device, but the 17th embodiment
As shown in the figure, the present invention can be widely applied to plate materials having a width twice or more than the wall thickness, such as when a flange 64 is formed at the entrance of a dish-shaped body 62.

[Effects of the Invention] As explained above, in the enlarged flange forming T method according to the present invention, a load is applied in the direction perpendicular to the wall thickness of the plate material to enlarge the wall thickness to form a tail portion, so it can be easily performed using a simple device. It has an excellent effect of making it possible to form a thick brim portion.

In addition, the enlarged flange processing device according to the present invention has the above-mentioned configuration and applies a load in the direction perpendicular to the wall thickness of the plate material to form a tail portion that enlarges the wall thickness. It has an excellent effect of making it possible to form a flange.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a collar processing device to which the present invention is applied;
Fig. 2 is a right-angle sectional view of Fig. 1, Fig. 3 is a plan view of Fig. 1, Fig. 4 is an operation diagram of Fig. 1, Fig. 5 is an operation diagram of Fig. 2,
Fig. 6 is a sectional view corresponding to Fig. 1 showing the final molding state, Fig. 7 is a sectional view taken along the line ■-■ in Fig. 6, Fig. 8 is a plan view of Fig. 6, and Fig. 9 is a sectional view of Fig. 5. Fig. 10 is an operation diagram of Fig. 9, Fig. 11 is a plan view of Fig. 10, Fig. 12 is a process diagram showing the anchor fitting of the first embodiment, Fig. 13 is a diagram of the second embodiment. 14 is a plan view of the anchor fitting after preforming, FIG. 15 is a sectional view showing the fully formed state of the second embodiment, and FIG. 16 is a sectional view of the second embodiment. FIG. 17 is a plan view of the anchor metal fitting and a cross-sectional view showing a molded state in a skin state. DESCRIPTION OF SYMBOLS 10...Anchor metal fitting, 10A...Fist preform head, 12...Legs, 14...Enlarged brim part, 18.20--Die. 26...Processed material, 40.560-Number holder, 48-Fist/preformed recess, 50--Punch, 58--Final molded recess, 62...Dish-shaped body, 64--Brim part .

Claims (4)

[Claims] (1) Expansion characterized by applying a load in the direction perpendicular to the wall thickness to the end of a plate material with a width dimension that is more than twice the wall thickness, and expanding the wall thickness of this end to form a flange. Brim processing method. (2) a preforming step of forming the end portion into a tapered shape;
The enlarged flange processing method according to claim 1, further comprising a main forming step of forming the flange by applying a load in a direction perpendicular to the wall thickness. (3) The enlarged flange processing method according to claim 2, wherein the tapered end portion has a flange portion having different protruding dimensions on the front and back sides by changing the inclination angles on both sides. (4) An enlarged flange processing device for forming an enlarged head on the end of a plate leg, which includes a plurality of dies that are movable from a preforming position to a main forming position and clamp the plate leg, and the forming position A preforming holder is provided with a conical preforming recess corresponding to the plate material protruding from the die, and the end portion of the plate protruding from the die is pressed in a direction perpendicular to the wall thickness at the preforming position to preform the material. a preforming punch for preforming into the recess; a main forming holder having an enlarged head forming recess corresponding to the preform projecting from the die at the main forming position; An enlarged brim processing device comprising: a main forming punch that presses the preformed portion in a direction perpendicular to the wall thickness to form the enlarged head forming recess.