JP3538772B2 - Electric hemming machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor-driven hemming apparatus for performing edge bending of a workpiece by a mechanical press, and more particularly, to a motor-driven hemming apparatus which combines two types of detecting motions for pre-bending and main bending. It relates to a processing device. The terms edge bending and hemming are used synonymously and interchangeably.

[0002]

2. Description of the Related Art Conventionally, a hemming device (pressing device in a broad sense) for bending a door or the like of an automobile has been known, but most of the pressurizing means are hydraulically driven (a hydraulic cylinder type). So, using a press mold 100 ~
Forming (edge bending) has been performed at a stretch with a large pressure of 200 t. In this type of processing apparatus, there is no electric type.

[0003] By the way, if it does not matter whether edge bending is performed or not, there has been proposed an all-electric mechanical press device. For example, in Japanese Patent Application Laid-Open No. 8-19895, a rotary drive device 20 is driven by a motor, and a cross head 6 and an upper die 7 are moved up and down between a bed 2 and a lower die 8 by a ball screw screw mechanism 5 so as to move up and down. (Press molding). Here, the work is made of a synthetic resin material.

However, in the above press apparatus, the work is placed on a lower die (bed) and the whole work is pressed from above, which is the same as the case of the hydraulic press, and only the driving means is changed. .

[0005] Of course, the problems of the hydraulic press described in the publication are common to the present invention. That is, there are problems such as a large load on an apparatus scale (exclusive area), introduction and maintenance costs of the apparatus, and management problems including machine performance.

[0006]

SUMMARY OF THE INVENTION In this context, the present invention has reviewed the problems of conventional hydraulic presses, particularly with regard to hemming of automobile-related members, construction-related members, and steel furniture-related members. It is an object of the present invention to provide an electric hemming machine which is an alternative to this, and which has improved functionality and economy.

[0007]

SUMMARY OF THE INVENTION In order to solve the problem, the present invention relates to an electric hemming apparatus for performing edge bending of a work by a mechanical press by combining two types of weighing motions related to preliminary bending and main bending. Then, the pre-bending link and the main bending link are staggered by the same electric drive source for the workpiece placed on the die, and the pre-bending and the main bending are performed by the respective working link materials. It is characterized by having a system toggle link mechanism.

In the two-system toggle link mechanism, the pre-bending link and the main bending link are connected to a rotating drive shaft that rotates forward and backward by the same electric drive source so as to perform stroke movements separately, and to perform respective operations. The link member is punched or hammered in a staggered manner from the orthogonal direction.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment of the present invention, in the above-mentioned structure, the preliminary bending link is a first link member as a drive arm which is pivotally mounted on a rotary drive shaft, and one end of an arm element is a first link. The second link member pivotally supported at one end of the member, the one apex end of the triangular element is rotationally fixed by a fixing pin, and
A third link member whose other apex end is rotatably supported on the other end of the arm of the second link material, a vertex end of the triangular element is rotatably supported on the remaining apex end of the third link material, and A fourth link member as a working link member having the pre-bending punch holder and the pre-bending punch member mounted with the other one apex end as a working end, and turning one end of the arm element to the remaining apex end of the fourth link material. The fifth link member is movably supported and the other end of the arm is rotationally fixed by a fixing pin.

In addition, the bending link has a first link member as a drive arm which is pivotally mounted on a rotary drive shaft, and one end of an arm element having an elastic body interposed in a body portion is connected to one end of the first link member. One end of the second link member and the triangular element, which are pivotally supported, are rotationally fixed by a fixing pin, and the other
A third link member pivotally supported at the other end of the link member; a fourth link member pivotally supported at one end of the arm element at the remaining apex end of the third link member; Rotationally supported at the other end of the arm of the 4-link material, the remaining one apex end is rotatably fixed by a fixing pin, and the other bending angle holder is used as a working end, and a main bending punch holder and a main bending punch member are mounted. And a fifth link material as a working link material.

Further, as will be described later, a double standing type device configuration in which the toggle link mechanisms having the above configuration are provided side by side (tandem arrangement) via an electric drive source (drive unit) can be provided.

[0012]

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic side view showing the configuration of a toggle link mechanism for preliminary bending.

FIG. 2 is a schematic side view showing the configuration of a toggle link mechanism for the main bending.

As shown in the figure, the apparatus (X) of the present invention uses the same electric drive source for the pre-bending link (1) and the main bending link (2) for the work (6) placed on the die (5). The staggering movement is performed staggered by the
(11-15); 2 (21-25)], and two systems of toggle link mechanisms for performing the preliminary bending and the subsequent main bending.

Specifically, by turning on an electric motor and a reduction gear (drive unit) (not shown), the rotation drive shaft (3), which is the main shaft, is rotated forward and backward, thereby
The pre-bending link (1) and the main bending link (2), which are connected by the same rotation drive shaft (3), are separately stroked, and the respective working link materials [1 (11-15); twenty one-
25)] is performed in a staggered manner (punching or hammering operation) from the orthogonal direction, and a preliminary bending and a subsequent main bending are performed.

FIG. 3 is a schematic side view showing the operation (stroke motion) of the toggle link mechanism relating to the preliminary bending and the main bending.

As shown in the figure, the toggle link mechanism for preliminary bending moves the preliminary bending link [1 (11-15)] from its initial position based on the forward rotation of the rotary drive shaft (3) as the main shaft. (Outward path), and transmit the motion (power) to the working link material [fourth link material] (14) equipped with the pre-bending punch holder (141) and the pre-bending punch member (142), and place it on the die (5). The pre-bending punch member (142) horizontally moves (punches) the placed work (6) to perform pre-bending. Here, since the edge of the work (6) to be processed is formed in advance, the pre-bending is performed in the vertical direction.
It is bent 45 to 50 ° inward as °.

While the rotary drive shaft (3) continues to rotate forward, the pre-bending link [1 (11-15)] returns to the initial position by making a stroke movement on the return path.

In the toggle link mechanism relating to the main bending, the rotary drive shaft (3), which is the main shaft, continuously rotates forward from the initial position after the completion of the pre-bending, and based on this, the main bending link [2 (21- 25)] to perform a stroke motion (outward path), and to transmit a motion (power) to a working link material [fifth link material] (25) equipped with the final bending punch holder (251) and the final bending punch member (252); The main bending punch member (252) is perpendicular (downward) to the pre-bent work (6) placed on the die (5).
Move (hammer ring) and perform inward bending of ~ 0 °.

At this point, the rotary drive shaft (3) changes its motion and starts to rotate in the reverse direction.
(21-25)] makes a return stroke and returns to the initial position.

The pre-bending link [1 (11-15)] again performs a stroke movement (reciprocation) based on the reverse rotation of the rotation drive shaft (3) during this time. In this case, the working link material [fourth link material] (14) is blanked.

Therefore, the preliminary bending link performs two stroke movements for one stroke movement of the main bending link.

The turning angle of the turning drive shaft (3) in the main bending stroke (or two pre-bending strokes) is about 120 °,
The detection of the both end positions related to start / stop and movement change and the drive command are performed by the stop switches (7, 7), respectively.

For reference, the specifications of the embodiment apparatus (single standing type) are listed. Machining capacity ・ Horizontal direction: 2ton / at5mm ・ Vertical direction: 15ton / at5mm Stroke ・ Horizontal direction: about 40mm ・ Vertical direction: about 120mm Processing length: Max.500mm Main motor: 1.5kw Motor processing with worm reducer Time: about 10 sec Dimensions: 500mm x 450mm x 750mm (approximate) Installation area: 500mm x 450mm

FIG. 4 is a schematic diagram of (a) a single standing type (XS) and (b) a double standing type (XW) of the device (X) of the present invention.

FIG. 5 is a plan view layout explanatory view in which the device (X; XS, XW) of the present invention is applied to the edge bending of an automobile door (8).

As shown in FIG. 4, the double standing type (XW) has a toggle link mechanism, specifically the above-mentioned toggle link mechanism, via an electric drive source (drive unit) (4) composed of an electric motor and a speed reducer (not shown). A single standing type (XS) is installed (tandem arrangement).

As shown in FIG. 5, three single standing type (XS) and two double standing type (XW) of the apparatus of the present invention are arranged in the edge bending of a door (full door) (8) for an automobile. ing. In addition, another device is in charge of the edge bending processing of the corner portion.

[0030]

The present invention has the above-described structure, and according to the present invention, at least the following effects can be obtained.

(1) Since the operation in the press is not required, the safety is high. (2) Machine adjustment and management are possible for each single machine, and the edge bending quality is high. (3) The manufacturing period is shortened, the manufacturing cost is low, and the amount of capital investment can be reduced. (4) Since the device types are combined and arranged (variable configuration) with respect to the work, power consumption (pressure) is not wasted and energy is saved. (5) The device configuration is compact and space-saving. (6) The operation (place) can be kept clean because it is electric and does not use oil (working fluid). (7) Machine adjustment and management can be performed for each single machine, and trials are easy. (8) It is sufficient to mainly inspect the link material, and maintenance is easy.

As a whole, it realizes low price, high productivity, space saving, and maintenance-free, and has high industrial value in that it can be expected to contribute to improvement of productivity in the manufacturing industry of small and medium enterprises. It is.

[Brief description of the drawings]

FIG. 1 is a side view device configuration schematic diagram showing a toggle link mechanism relating to preliminary bending.

FIG. 2 is a schematic diagram of a side view device configuration showing a toggle link mechanism related to a main bending.

FIG. 3 is a schematic side view showing a series of operations (stroke motions) of a toggle link mechanism relating to preliminary bending and main bending.

FIG. 4 is a schematic view of (a) a single standing type and (b) a double standing type of the device of the present invention.

FIG. 5 is a plan view layout explanatory view in which the device of the present invention is applied to edge bending of an automobile door.

[Explanation of symbols]

1 Preliminary bending link 11 First link material 12 Second link material 13 Third link material 14 4th link material (working link material) 141 Pre-bending punch holder 142 Pre-bending punch member 15 Fifth link material 16 Fixing pin Two bending links 21 First link material 22 Second link material 221 elastic body 23 Third link material 24 4th link material 25 Fifth link material (working link material) 251 bending punch holder 252 bending punch members 26 Fixing pin 3 Rotation drive shaft (spindle) 4 Electric drive source (drive unit) 5 die 6 Work 7 Stop switch 8 Automotive doors X device of the present invention XS device of the present invention (single standing type) XW device of the present invention (double standing type)

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-61-165233 (JP, A) JP-A-4-59140 (JP, A) JP-A-7-185677 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) B21D 5/04 B21D 19/00 B21D 19/08 B21D 39/02 B30B 1/26

Claims (4)

(57) [Claims] 1. An electric hemming apparatus for performing edge bending of a workpiece by a mechanical press, wherein the electric hemming apparatus combines two types of profiling motions related to preliminary bending and main bending, and is mounted on a die. A two-way toggle link mechanism is provided for performing preparatory bending by each working link material and subsequent main bending by making the preliminary bending link and main bending link staggered by the same electric drive source. An electric hemming device, characterized in that: 2. A toggle link mechanism of two systems connects a preliminary bending link and a main bending link to a rotational drive shaft that rotates forward and reverse by the same electric drive source and separately performs a stroke movement, and each of the operation links. 2. The electric hemming apparatus according to claim 1, wherein the material is punched or hammered with a time difference from an orthogonal direction. 3. A first link member as a drive arm which is pivotally mounted on a rotation drive shaft, a second link member having one end of an arm element pivotally supported on one end of the first link member, and
A third link material in which one apex end of the triangular element is rotatably fixed by a fixing pin and the other apex end is rotatably supported on the other end of the arm of the second link material; As a working link material having a pre-bending punch holder and a pre-bending punch member mounted with the other bending angle end as the working end and the other bending angle end as the working end. And a fifth link member having one end of the arm element rotatably supported by the remaining apex end of the fourth link member and the other end of the arm being rotatably fixed by a fixing pin. A first link member as a drive arm mounted on a shaft, a second link member rotatably supporting one end of an arm element having an elastic body interposed on a body portion at one end of the first link member, a top of a triangular element The corner end is rotated and fixed by a fixing pin, and the other apex end is fixed to the second link material. A third link member rotatably supported at the other end of the arm, a fourth link member rotatably supported at one end of the arm element at the remaining apex end of the third link material, and a fourth link material at one apex end of the triangular element. The link is pivotally supported on the other end of the arm, the remaining one apex end is rotatably fixed by a fixing pin, and the other bending angle end is used as a working end, and a working link is provided with the main bending punch holder and the main bending punch member. The electric hemming apparatus according to claim 1 or 2, wherein the apparatus comprises a fifth link material. 4. The electric hemming apparatus according to claim 1, wherein a toggle link mechanism is provided on both sides via an electric drive source.