JP2888631B2 - Bending equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method in which a work such as a metal extruded shape member such as aluminum is cooperated with a fixed mold and a movable gyro mold arranged in front of the fixed mold. The present invention relates to a bending device that performs three-dimensional bending.

In this specification, the term aluminum is used to include its alloy.

2. Description of the Related Art For example, when a long aluminum extruded shape used for building materials, machine parts, automobile parts, etc. is bent in two dimensions or three dimensions, a fixing metal generally called a multi-bender is recently used. A bending apparatus provided with a mold and a movable gyro mold has been used recently. The bending by the multi-bender is performed by dominantly utilizing the principle of so-called compression bending, in which the work is pressed and bent, so that the local elongation of the material can be relatively small, and the material defect can be reduced. This is advantageous in obtaining a bent product having less surface defects. Thus, in such a multi-bender, a die called a feed case for guiding having a work conduction hole is provided behind the fixed die to guide the work pushed into the fixed die straight to the fixed die. It is generally deployed. The work is guided and supported while being in contact with the inner surface of the feed hole of the feed case, and is pushed to a fixed mold and further to a movable gyro mold.

However, since the above-mentioned feed case was conventionally made of iron such as S45C and SS41, if the aluminum material or the like was bent in particular for a long time, the surface of the aluminum material which slidably contact the inner surface of the feed hole of the feed case was galled, Seizure occurs, and as a result, a situation occurs in which a flaw is generated in the work, and smooth bending is often hindered.

In addition, since machining is not easy with an iron feed case, especially when the workpiece has a special shape, the machining accuracy of the feed case to be adapted to the shape is reduced, and therefore, it is not possible to supply a smooth workpiece. there were.

The present invention has been made in view of such a technical background, and has a problem in which a work caused by a feed case is galled.
An object of the present invention is to provide a bending apparatus capable of preventing the occurrence of seizure and the like, and capable of processing a complicated shape with high accuracy.

Means for Solving the Problems The present inventors have conducted intensive experiments and researches to achieve the above object, and as a result, formed a feed case of aluminum and provided a lubricating surface coating layer on a contact surface with a work. Forming and guiding and supporting the work does not cause galling or seizure due to contact with the feed case, and enables smooth pushing support with almost no harmful defects on the surface of the work. The inventor has found that it is possible to perform a bending process, and completed the present invention.

That is, the bending apparatus according to the present invention comprises: a fixed mold having a work conducting hole; and a fixed mold disposed in front of the fixed mold, also having the work conducting hole, and capable of turning and displacing in a three-dimensional direction. A movable gyro mold; and a work guide feed case having a work conduction hole disposed at a rear position of the fixed mold. The fixed mold and the movable gyro mold are guided and supported by the feed case. A workpiece that is successively forcibly conducted to the workpiece, the movable gyro mold to give a predetermined bending by the operation of the die, wherein the feed case is formed of aluminum, the feed case A lubricated surface treatment layer is formed on at least the work contact surface.

The type of the above-mentioned lubricating surface treatment layer is not particularly limited, and the lubrication between the work and the feed case is ensured and the abrasion resistance is good, for example, a fluorine resin film such as an anodized film (alumite film) or Teflon. Can be suitably adopted.

In the above bending machine, a lubricating surface treatment film is formed on the work contact surface of the feed case. Therefore, the lubrication of the surface prevents the work from sticking to the feed case, causing seizure and galling. Is prevented. Moreover, since the feed case is formed of aluminum, the processing is facilitated and the processing accuracy is improved.

Examples Examples of the present invention will be described below.

In the bending apparatus shown in FIG. 1, (1) is an iron fixed mold, (2) is an iron movable gyro mold disposed in front of the fixed mold (1), and (3) is A work feeder arranged at a position behind the fixed mold (1),
(4) and (5) are mold unit driving devices.

The fixed mold (1) is composed of a pair of upper and lower mold units (6) and (6) arranged opposite to each other, and a work having a circular cross section having a size suitable for the outer circumferential work (A) between the two. A conduction hole (7) is formed. Each mold unit (6) (6)
A retaining mold member (6b) is arranged on the inner surface of the holding mold member (6a) on the inlet side, and a bending fulcrum mold member (6c) is arranged on the inner surface on the outlet side of the retaining mold member (6a). It is.

On the other hand, the movable gyro mold (2) is also formed by a pair of upper and lower mold units (9) and (9), and has a size between the two that is also suitable for the outer peripheral circular work (A). A work conduction hole (10) having a circular cross-section is formed. The gyro mold (2) is mounted on a gyro mold mounting frame (not shown) that can move up, down, left, and right, and is three-dimensionally turned and displaced using the gyro principle. .

The mold unit driving devices (4) and (5) are of an electromagnetic type or the like, and as shown in FIG. 1, each mold unit of the fixed mold (1) and the movable mold (2). (6) and (9), and connect the mold units (6) and (9) with the conduction holes (7) and (1).
The work (A) is operated so as to be pressed against the outer peripheral surface of the work (A).

On the other hand, the work feeder (3) includes a cylindrical feed case (12) and a pusher (13) that travels in the feed case (12) in the front-rear direction. The feed case (12) is a pair of upper and lower case units (12a) (12
a), and these case units (12a) and (12a) are arranged to face each other with a slit (12b) therebetween, and a work conduction hole having a circular cross section of a size that is also suitable for the work (A) is provided at the center between the two. (10c). In addition, the presser (13) is provided with protrusions (13a) provided on both sides thereof.
The feed case (12) is passed through the left and right slits (12b) so as to protrude to the side of the case (12), and is moved by operating a driving device connected to the protruding piece (13a). ) Is transferred to the fixed mold (1) side.

By the way, the feed case (12) is made of aluminum from the viewpoints of workability, weight reduction, and the like. The material of aluminum is not particularly limited, and 5000 series alloys such as 5052, 5N01, 5056, 7N01, 7003, 70
7000 series alloys such as 75 and 7078 and other alloys can be appropriately employed. Further, as shown in FIG. 2, the feed case (12) has an alumite film, a Teflon or other fluororesin film on the opposing surfaces of the case units (12a) and (12a) including the inner surface of the work conduction hole (12c). And a surface treatment layer (12d) having lubricity and wear resistance. The thickness of the surface treatment layer (12d) is not particularly limited. Moreover, the fact that the feed case itself is made of aluminum is also dusty, so that the adhesion of these films is good, and the lubricating effect can be more effectively exerted over a long period of time.

The three-dimensional bending of the outer circumferential work by the bending apparatus is performed as follows. First, the work (A) is placed in the feed case (12), and the leading end of the work (A) is pressed by the presser (13) into the conduction holes (7) of the two dies (1) and (2).
Conductive arrangement at (10). At this time, the work (A) is guided to the fixed mold (1) while slidingly contacting the inner surface of the conduction hole (12c) of the feed case (12). The lubricated surface treatment layer (12d) exerts a lubricating action on the work (A), and seizure or seizure of the work on the feed case (12) is prevented even by continuous transfer of the work (A). Then, the respective mold unit driving devices (4) and (5) are driven to press the inner surfaces of the mold units (6) and (9) against the outer peripheral surface of the work (A), and to rotate the work (A) in the rotation direction. Constrain displacement. The pressing force on the work (A) does not cause rotation of the work (A) during the three-dimensional bending, and does not hinder conduction of the work (A) into the molds (1) and (2). Within such a range, it is determined based on calculated values, empirical data, and the like. In the pressed state, the presser (13) is driven forward, and the movable gyro mold (2) is operated three-dimensionally to perform three-dimensional bending of the work (A). At this time, even if a couple acts on the work due to a change in the center of gravity position of the processing part which moves and draws a three-dimensional shape in front of the movable gyro mold, the work is rotated by the press contact force. Absent.

The configurations of the fixed mold (1) and the movable gyro mold (2) do not affect the requirements of the present invention.
Therefore, they are not limited to those in the illustrated embodiment.

As described above, according to the multi-bender type bending apparatus of the present invention, the feed case for guiding and supporting the work disposed behind the fixed mold is made of aluminum, and at least the work contact of the feed case is performed. Since the lubricating surface treatment layer is formed on the surface, the lubrication of the surface prevents the work from sticking to the feed case and prevents seizure and galling. Therefore, bending of a workpiece made of aluminum or the like can be smoothly performed without causing surface defects, and a high-quality bent product can be obtained. Moreover, since the feed case itself is made of aluminum, it can be processed easily and with high precision, and can be a feed case that can sufficiently cope with complicated work shapes. In addition, there is an effect that the weight of the feed case itself can be reduced due to the lightness of aluminum.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the entire configuration of the bending apparatus, and FIG. 2 is a sectional view taken along line II-II of FIG. (1) ... fixed mold, (2) ... movable mold, (7) (1
0) Work conduction hole, (12) Feed case, (1
2c) Workpiece conduction hole, (12d) Surface treatment layer.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B21D 7/00-7/16 B21C 9/00 B21D 43/02

Claims (1)

(57) [Claims] A fixed dies having a work conducting hole, a movable gyro mold disposed in front of the fixed mold, also having a work conducting hole, and capable of turning and displacing in a three-dimensional direction; A feed case for work guide having a work conduction hole disposed at a position rearward of the fixed mold, and forcibly conducting the fixed mold and the movable gyro mold sequentially while being guided and supported by the feed case. A bending machine for imparting a predetermined bending to a work to be performed by an operation of a movable gyro mold, wherein the feed case is formed of aluminum, and at least a work contact surface of the feed case is lubricated. Bending device characterized in that a surface treatment layer having a characteristic property is formed.