JPH0366053B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the configuration of an automatic processing device that can bend a flexible wire such as a metal wire into an annular frame of predetermined dimensions without error.

[Prior Art] Conventional frames made of metal wires and the like have been used, for example, as base frame materials for grilling nets. In processing such flexible wire into a frame, generally, first,
This method is based on the method of preparing cut straight wire rods and bending them as appropriate.Although this method has already been automated and mechanized, it is still carried out manually. This is the current situation.

[Problems to be Solved by the Invention] Conventionally, in the bending process for flexible wire rods, as shown in FIG. , due to the elasticity of the wire itself, both end portions tend to deform into a state of expanding outward as shown by H'.
For this reason, as shown in Fig. 13, taking into consideration the degree of deformation due to the elasticity of the wire, as in the case of the primary processed wire I, the correction values are calculated in advance for both end portions, and each end is bent significantly inward. This method was used to obtain a predetermined primary processed wire I'.

In addition, in the case of a secondary processed wire material that has been processed into a frame shape, a predetermined frame material J' as shown in FIG.
On the other hand, the degree of deformation increases depending on the number of bends, and therefore, the bending process by the above-mentioned operation that takes into account the correction value in advance is extremely complicated as shown in the secondary processed wire K shown in Fig. 15. Become. Note that K' indicates a predetermined frame-shaped material.

As described above, it is generally difficult to obtain a frame-shaped secondary processed wire rod in a predetermined shape with accurate dimensions, so the tertiary processing of welding both ends to form an annular frame is extremely difficult. It becomes difficult. In other words, when the above-mentioned frame-shaped both end portions are subjected to an outward elastic action, the frame E having the welded portion W' bulges outward as a whole, as shown in Fig. 16. Obtained in form. In this case, both ends of the wire rod, which is the part to be welded, are separated, so the welded part W' becomes thin and weak.

Therefore, the present invention eliminates the drawbacks of the above-mentioned conventional example, and enables a predetermined wire frame to be formed accurately and uniformly.
Furthermore, the purpose of the present invention is to provide a device that maintains the necessary welding strength and can be automatically mass-produced.

[Means for Solving the Problems] In order to achieve the above object, the present invention has an automatic wire frame manufacturing apparatus configured as follows.

That is, the convex metal has a protruding and retractable side surface, and has a straightening piece at the bottom thereof, which forms a sloped surface slightly wider than the protruding side surface corresponding to the bending position with respect to the wire to be processed. It has a mold and a concave surface that matches the cross-sectional shape of this convex mold, and pressurizes both open ends based on this concave surface and moves along the open surface of this concave surface, and crosses the receiving groove on the front side surface. This concave mold has a processing groove formed along the moving direction on the rear side surface so that the wire to be processed can be received, and two pressurizing heads are integrally disposed facing each other. The protruding side surface of the convex mold is introduced into the concave surface of the concave mold through the open part thereof, and the wire rod to be processed is introduced in a state spanning between the receiving grooves on each of the pressurizing heads. A welding machine is disposed along one plane so that the convex mold can be received under pressure, and a welding machine is disposed on this plane in front of the convex mold with a welding electrode facing the convex mold. The present invention is characterized in that it is equipped with a straightening press device having a pressurizing frame located above the mold and lowered under pressure that presses and lowers the convex mold along at least symmetrical side surfaces thereof.

In the above-described features of the present invention, the wire to be processed includes not only a metal wire but also a flexible plastic wire. Moreover, the shape of the frame as a processed product can be various, such as a rectangular shape, a circular shape, and a hexagonal shape.

In addition, the configuration for receiving the convex mold onto the concave mold in a pressurized state can be achieved, for example, by interlocking one of these with a pressurizing cylinder having a drive shaft that drives the convex mold along the receiving direction. It can be realized.

Furthermore, the protruding and retracting structure of the side surface of the convex mold may be such that the entire side surface protrudes and retracts at one time, or a portion of the side surface may move in this manner. In addition, an appropriate concave portion can be provided on the side surface of the convex mold facing the welding machine so that the welding electrode end can be extended.

In addition, the position of the correction piece on the convex mold corresponds to the bending position of the wire to be processed, but for example, if the target frame is rectangular, it may be provided corresponding to the four corners of the frame, or In the case of a shaped mold, it is sufficient that the entire lower part of the convex mold has a widening slope.

Moreover, the respective machined grooves of the two pressurizing heads do not have to be on a straight line with each other. In other words, these may be formed slightly shifted vertically. Such a configuration is convenient for obtaining a wire material processed into a frame shape, with both ends thereof overlapping each other.

Further, on each pressurizing head, guide grooves are formed on the mutually opposing sides thereof in series with the receiving and processing grooves, and the concave mold is formed so as to be continuous with these guide grooves. A groove may be formed on the upper concave surface according to the shape of the concave surface to receive the wire to be processed.

[Operation] A state in which the convex mold having the protruding side surface portion is received under pressure into the concave surface of the concave mold via the open part in a pressurized state, straddling the respective receiving grooves on each pressurizing head. The straight wire to be processed introduced in step 1 is forcibly guided into the concave surface of the concave mold while its intermediate portion is supported by each receiving groove on each pressing head.

In this process, the intermediate portion of the wire to be processed is deformed into a shape that follows a concave shape. At this time,
The convex mold is completely accommodated in the concave surface of the concave mold, and the deformed wire rod is in close contact with the side surface of the convex mold and is placed at a position corresponding to each receiving groove. maintained. Therefore, when each pressurizing head is pressurized and transferred along the open surface of the concave mold, the end portions of the wire to be processed are guided into the pressurizing grooves, and both end portions are Each of the convex molds is deformed along the corresponding side surface. At this stage,
Both ends of the wire to be processed are in close proximity to form a frame shape.

Next, when the side part of the convex mold is recessed,
Both end portions of the wire rod to be processed are held in such a manner that their end surfaces are in contact with each other or overlapped by the extrusion force of each pressing head. Therefore, by moving the welding machine and extending its electrode portion to this, both end portions can be welded to obtain a frame-shaped material.

Next, each pressure head is returned to its original position, and the receiving state between the convex mold and the concave mold is released. At this time, the frame member is still on the convex mold in a loosely fitted state.

Next, when the pressurizing frame on the straightening press device is pressurized and lowered along the symmetrically located side parts of the convex mold, the frame body in the above-mentioned loosely fitted state is forcibly pressed against the lower part of the convex mold. It is made to extend over the slope of each correction piece and also to pass through that part.

As a result, the frame-shaped material is corrected and deformed to a predetermined shape, and at the same time, the strain stress caused by bending is also eliminated.

[Example] Next, examples of the present invention will be described.

As shown in FIG. 1, the wire frame automatic manufacturing apparatus 1 in this embodiment has a convex mold 2 and a concave mold 6, and a side surface of the convex mold on an open surface 6b based on a concave surface 7 on the concave mold 6. The mold apparatus is provided with mold devices disposed back and forth along one plane with the parts facing each other.

The convex mold 2 is fixedly disposed and has a cross-sectional shape corresponding to the rectangular shape of the target frame.
As shown in FIGS. 2 and 3, this convex mold 2 consists of a mold stand 3, convex portions 2a, 2a, and a stopper shaft 20. The mold stand 3 is made up of upper and lower base plates 3a, 3a each having a through hole 3b on its surface, supported mutually in parallel by support walls 3c, 3c. Between these base plates 3a, 3a are convex surface portions 2a, which constitute side surfaces of this convex mold 2.
2a are arranged with their respective end faces facing each other. The convex portions 2a, 2a have guiding recesses 2c, 2c on their opposing end surfaces, respectively, into which support walls 3c, 3c are fitted, and are continuously connected under tension by springs 2d, 2d. has been done. In addition, each through hole 3 is provided on each end surface portion.
It has a notch 2e that communicates between b and 3b. Therefore, when the stopper shaft 20 is inserted from above between the through holes 3b, 3b, it extends between the notches 2e, 2e and the convex portions 2a, 2e.
2a is expanded against the elasticity of springs 2d, 2d. For this reason, the stopper shaft 2
0 is sandwiched between the notches 2e and 2e, and its inserted state is maintained. Also, at this time, each convex surface portion 2
As a, 2a move in opposite directions, their end surfaces protrude from the corresponding edge portions on the base plates 3a, 3a, respectively, and are exposed on both side surfaces of the convex mold 2. A protruding surface will be formed.

Also, correction pieces 4 are fixedly installed at corner positions on the lower surface of the base plate 3a located at the lower part so as to expand downward. At this time, the outer surface portion of each correction piece 4 forms a slope that slightly projects from the corresponding corner edge on the above-mentioned projecting surface.

In addition, at the center of the front side surface of the convex mold 2, from the convex surface portions 2a, 2a to each base plate 3a, 3a.
A concave portion 2b extending as far as It is arranged.

In addition, the stopper shaft 20 is coaxial with the shaft rod 21.
This shaft rod 21 is configured to move up and down by a cylinder 19 suspended and fixed on a support plate 18 disposed above the convex mold 2.

On the other hand, the concave surface 7 on the concave mold 6 is the convex surface portion 2 described above.
The convex mold 2 having a convex surface according to a and 2a has a shape that matches its cross-sectional shape. Further, this concave mold 6 is connected to a drive shaft on a cylinder 8 disposed at the rear, which drives in the front-rear direction.

In addition, the open ends 6a, 6a on the concave mold 6,
Cylinders 11 each having a drive shaft 12 extending along an open surface 6b based on the concave surface 7 are arranged in series. At the end of each drive shaft 12, pressurizing heads 9 are fixed, respectively, having side surfaces facing each other that are flush with the concave surface 7 at the open end 6a when the shaft is contracted. A receiving groove 9a is formed on the front side surface adjacent to the opposing side surfaces of these pressurizing heads 9, and a processed groove 9b is formed on the rear side surface of the pressurizing heads 9, 9, in the center thereof, along the direction of movement thereof. It will be done.

In addition, a straightening press device 1 is located above the convex mold 2.
3 is arranged. This device 13 consists of two processing frames 1 each having a molding surface that matches the side shape of a convex mold 2.
4, 14, and these pressurizing frames 14, 14 are respectively supported on the lower ends of support rods 15 that hang down at intervals corresponding to the width of the convex mold 2, with their molding surfaces facing each other. These support rods 15... each have a through hole 18.
A drive shaft 1 that extends above the support plate 18 and drives the press cylinder 17 up and down while penetrating through a...
It is fixed on the surface of a fixed plate 16 joined to the end of 7a. Accordingly, as the drive shaft 17a is driven downward, the pressurizing frames 14, 14 are lowered under pressure with their opposing surfaces close to the side surfaces of the convex mold 2.

Further, a wire rod receiver 22 is disposed between the convex mold 2 and the concave mold 6 and at a position in front of each pressurizing head 9, respectively. These wire rod holders 22 are supported so as to be slidable in the front and back directions on the upper end of a support shaft 24 which is vertically and elastically displaceable, and furthermore, there are grooves at the bottom of both ends that correspond to the sliding direction. Therefore, springs 23 and 23 are provided, respectively, to which tensile force is evenly applied. Further, each of these wire rod holders 22 has a front flat part 22b.
It has a protruding portion 22a on the rear surface that protrudes from the rear surface,
Due to the action of the springs 23, 23, the flat portion 22b is stabilized in advance in a slightly rearwardly inclined state.

The automatic wire frame manufacturing apparatus 1 described above functions and operates as follows.

First, as shown in FIG.
It is introduced so that it straddles the top of the two. At this time, the wire rod A to be processed is supported near the boundary between the inclined plane portion 22b and the convex curved portion 22a on each wire rod holder 22, and is placed at a position between the convex mold 2 and the concave mold 6. will be done.

Further, the stopper shaft 20 is inserted in advance in the concave mold 2, and the above-mentioned protruding surfaces formed by the respective convex surfaces 2a, 2a are located at predetermined positions on both side surfaces.
Further, each pressure head 9 is in a retracted position in advance,
The opposing surface is flush with the concave surface 7. Next, when the cylinder 8 is driven, the concave mold 6 is pressurized and moved forward integrally with the pressurizing head 9 and the like. In this process, as shown in FIG. 4, the lower edge of the front side of each pressurizing head 9 extends over each wire rod holder 22, and as the end of each support shaft 24 descends, each convex curved portion 22a, and each wire rod receiver 22 is swung so as to further incline each flat portion 22b.
As a result, the wire rod A to be processed is received within the receiving grooves 9a, 9a.

Next, when the concave mold 6 and the like move further forward, the intermediate portion of the wire rod A to be processed located between the receiving grooves 9a and 9a collides with the rear side surface of the convex mold 2, and further the convex mold 2 into the concave surface 7 of the concave mold 6, the processed wire A is bent at the corresponding corner on the convex mold 2 like the primary processed wire B. It is guided into the concave surface 7 in close contact with the side peripheral surface.

When the convex mold 2 is completely received in the concave surface 7, the intermediate part of this primary processed wire B is in the convex mold 2.
It is held between the side surface and the concave surface 7, and is fixed in such a manner that both end portions thereof are exposed from within the concave surface 7. Next, as shown in FIG. 5, in the process of pressure transfer of each pressure head 9 along the open surface 6b of the concave mold 6, both end portions of the primary processed wire B are respectively convex. It is bent at the corresponding corner on the mold 2. At this time, the above-mentioned both end portions are held in the processing grooves 9b, and guided processing is performed so that the both end portions are located close to each other, thereby obtaining the secondary processed wire C.

Next, when the stopper shaft 20 is removed from the top of the convex mold 2 by driving the cylinder 19, the convex mold 2
The side portions that were in the protruding state become recessed. Therefore, the end surfaces of both ends of the secondary processed wire C come into contact with each other due to the pressing force of the pressing heads 9, 9. In this state, the welding machine 25 is moved rearward so that its electrode portion 26 extends into the concave portion 2b, thereby strongly welding the two ends together. This welded portion is indicated by W in FIG. As a result, a frame wire D was obtained.

Note that the above-mentioned strong weld W can be obtained in the same way even when both ends of the secondary processed wire C are overlapped with each other. Therefore, by increasing the degree of immersion in the side surface of the convex mold 2 and/or by making the wire to be processed longer, each pressure head is Section 9 can also be activated.

Next, after the welding machine 25 and each pressurizing head 9 return to their original retracted positions, the cylinder 8 is driven to return the concave mold 6 and the like to their initial positions, and the convex mold 2 is in the receiving state. is resolved. At this point, as shown in FIG. 6, the frame-shaped wire D is still partially locked onto the side surface of the convex mold 2 and is loosely fitted.

Next, the drive shaft 17a is moved downward by driving the cylinder 17, and the fixing plate 16 and the support rod 15...
In the process of pressurizing and lowering the pressurizing frames 14, 14 through the pressurizing mold 2, as shown in FIGS. The frame-shaped wire D is simultaneously moved over the lower straightening pieces 4 and further forced to pass over the slopes above these straightening pieces 4. At this time, the frame-shaped wire D is expanded as a whole as shown in FIG. 8, and as a result, it is possible to obtain a processed wire frame E which is corrected to a predetermined dimension and in which the stress effect caused by the above-mentioned bending process is eliminated. can.

According to the present invention, as shown in FIG.
When the frame-shaped wire rod is obtained as a circular frame F, this can also be further obtained as a hexagonal processed wire frame G in the straightening press unit.

Next, FIG. 10 and FIG. 11 show a mold device section in a second embodiment of the present invention.

In this embodiment, a concave mold 6' has a concave groove 7a approximately in the center of the concave surface 7 that follows the shape of the concave surface, and a receiving groove 9a that is continuous with the concave groove 7a when in the retracted position on the opposing surface. and a machining head 9', 9' having a machining groove 9b and a series of guide grooves 9c, and other components are the same as the apparatus described above.

In the apparatus of this embodiment, when the convex mold 2 is received in the concave surface 7 of the concave mold 6', the primary processed wire B is guided into the concave groove 7a via the corner guiding grooves 9c, 9c. be done. As a result, even if the design accuracy between the convex mold 2 and the concave surface 7 of the concave mold 6' is inferior to some extent, it is possible to always ensure that the primary processed wire B is guided to a predetermined position. .

[Effects of the Invention] Since the present invention is configured as described above, the following effects are exhibited.

Since the wire to be processed is bent by the receiving operation between the convex die and the concave surface of the concave die and the shifting operation of each processing head, the bending state is always constant.

In addition, the welding process on both ends of the wire to be processed fixes the entire wire after bending between the convex die, the concave die, and each pressure head, and also ensures that both ends are in sufficient contact with each other. Since it is executed in the state,
Strong welds can be formed.

In addition to the formation of this strong weld, the straightening process using the straightening piece on the convex mold and the straightening press device ensures that the product always matches the design dimensions and eliminates internal distortions caused by bending. A wire frame can be obtained.

Furthermore, the apparatus of the present invention makes it possible to automatically mass-produce the above-mentioned product wire frames.

[Brief explanation of drawings]

FIG. 1: A perspective view of an automatic wire rod frame manufacturing apparatus according to an embodiment of the present invention, FIG. 2: A front view of a broken surface of the convex mold, FIG. 3: A plan view of the center cross section of the convex mold, Fourth
FIG. 5: An explanatory partial sectional plan view, FIG. 6: An explanatory partial sectional plan view, FIG. 7: An explanatory partial front view, FIG. 8: An explanatory partial sectional plan view. A plan view of the product wire frame, FIG. 9... A plan view of the product wire frame, FIG. 10... An explanatory partial cross-sectional plan view, FIG. 11
FIG. 12: An explanatory plan view of the processing state of the wire rod. FIG. 13: An explanatory plan view. FIG. 14: An explanatory plan view. FIG. 15: An explanatory plan view. FIG. 16 is an explanatory plan view of the processing form of the wire rod. Explanation of drawing symbols, 1... Wire frame automatic manufacturing equipment,
2...Convex mold, 2a...Convex surface part, 3...Mold stand,
4... Correction piece, 6... Concave mold, 6a... Open end, 6b... Open surface, 7... Concave surface, 7a... Concave groove, 9... Machining head, 9a... Receiving groove, 9b... Machining groove, 13... Straightening press, 14... Pressure frame, 1
5...Support rod, 20...Stopper shaft, 25...
Welding machine, 26...Welding electrode section.

Claims (1)

[Scope of Claims] 1. Straightening pieces each having a protruding and retractable side surface and forming a sloped surface slightly wider than the protruding side surface corresponding to the bending position with respect to the wire to be processed. It has a convex mold and a concave surface that matches the cross-sectional shape of the convex mold, and pressurizes both open ends based on this concave surface and moves along the open surface of this concave surface to be received on the front side surface. A concave mold with a groove formed on the rear side surface and two pressurizing heads formed along the moving direction so as to be able to receive the wire material to be processed are integrally disposed facing each other. However, the workpiece is introduced into the concave surface of the concave mold through the open part thereof with the protruding side surface of the convex mold straddling between the receiving grooves on each of the pressurizing heads. The wire rods are arranged one after the other along one plane so that they can be received together with the wire under pressure, and a welding machine is arranged on this plane at a position in front of the convex mold with welding electrodes facing each other. Further, a straightening press device is disposed above the convex mold and has a pressurizing frame provided at a lower part thereof, which pressurizes and lowers the convex mold along at least a symmetrical side surface of the convex mold. Automatic wire frame manufacturing equipment. 2. Form a guide groove on the opposing side surface of each pressure head so as to be continuous with the receiving groove and the processed groove, and form the concave mold so as to be continuous with the guide groove, respectively. 2. The wire frame automatic manufacturing apparatus according to claim 1, wherein a groove for receiving the wire to be processed is formed on the upper concave surface according to the shape of the concave surface. 3. A convex mold has two base plates each having a through hole in the center of the surface, supported by a support wall in parallel to each other so that the through holes are connected in series, and this mold. two convex portions which are disposed between the base plates on the table and whose side portions slidably facing each other are connected in tension by an elastic member; The wire rod according to claim 1 or 2, characterized in that the wire rod comprises a stopper shaft whose end face can be made to project outward from the corresponding end edge on each base plate, respectively. Automatic frame manufacturing equipment.