JP2013508164A - Holding device for holding an object such as a wire blank - Google Patents

Abstract

A device for holding and rotating an elongated object (3) in a working position in a working machine for machining. The holder part (4) has a seat part (7) for the object and is rotatable around a center of rotation coinciding with the axis of the object in the range of the object in the seat part. The holder part is supported by the fixed support device (2) using a motion transmission mechanism. This comprises a support arm (17, 18) connected between the drive device (30) and the holder part via a pivot point (21, 22, 24, 25, 27, 28). The pivot points are arranged away from the center of rotation (34) in order to create a torque acting on the holder part for rotation of the holder part. The locking device (5) can be switched between the fixed position and the release position of the object. The support mechanism (32) is disposed between the support device and the holder portion at the same height as the seat portion, and the movable support surface (41-) in the movable support portion that moves together with the holder portion. 45) having a fixed support arm (33) with a fixed support surface (36-40) in contact with it.

Description

  The present invention relates to an object, preferably an elongated object, such as a wire blank, at a work position in a work machine for machining or processing an object in one or more work steps, as in the preamble of the appended claim 1. And, if necessary, an apparatus for rotating the object during the work process. In the manufacturing industry, wires are often bent to become construction components or final products. Today, the production takes place in automatic bending machines supplied with wires or wire blanks. However, known bending machines have holding devices with certain limitations. This means that the product configuration is limited.

  In a known type of holding device used with a bending tool, for example in US Pat. No. 4,662,204, the wire is bent in a fixed position. Such a tool has a specific width, and the use of the tool means that the bending of the wire cannot be performed along a specific length of the wire, i.e. the length occupied by the holding device, and , Meaning that it cannot be performed along the additional wire length closest to the bending tool.

US Pat. No. 4,662,204

  One object of the present invention is to allow bending of the wire along the additional wire length, i.e. the wire length occupied by the tool for fixing the wire during the working or bending process. .

  Another object of the invention is to allow bending of a wire or wire blank to be carried out three-dimensionally using the device according to the invention.

  According to the invention, these objects can be achieved by a holding device for fixing the wire during the bending process. The wire or wire blank is herein held by a holding device separate from the bending tool itself during the bending process. Thereby, the portion of the wire length occupied by the device for fixing the wire can be configured with a shorter length. That is, the portion of the tool that holds the wire has a smaller dimension. Furthermore, the journal bearing of the device can be placed away from the working area and therefore does not penetrate into the limited space that is adjacent to the area where bending is desired to be performed. The device, whose design is relatively simple and substantially mechanically constructed, is reliable in its use and can be manufactured at a relatively low cost.

  The device is characterized by what is stated in the characterizing part of claim 1. The holding device rotates about a center of rotation that coincides or substantially coincides with the longitudinal axis of the object to be machined or processed, i.e. the longitudinal axis in the main area of the object in the seat of the holder. Is possible. Further, the holder is attached to a plurality of support points that are spaced from the center of rotation.

  According to an embodiment of the device according to the invention, the control unit and / or the drive unit are arranged further away from the center of rotation than the support point for the holder.

  In the following description, further features and advantages of the device according to the invention will become apparent from the examples. Also, in the following description, reference will be made to the attached schematic drawings simultaneously.

It is the figure which looked at the Example of the holding | maintenance apparatus by this invention which fixes a wire or a wire blank from the one side. It is a one part perspective view of a holding | maintenance apparatus. It is sectional drawing along the AA line of FIG. It is sectional drawing along the BB line of FIG. It is sectional drawing along the CC line of FIG. It is a front view of a holding device. It is the schematic of a bending machine provided with the holding | maintenance apparatus by this invention. It is the figure which looked at the part of the wire bent in the state fixed using the holding | maintenance apparatus by this invention from the one side. It is the figure which looked at the part of the corresponding wire bent in the state fixed by the known fixing method from the same side.

  1 and 2 show a holding device according to the invention arranged with a suspension device 2 for lifting the holding device 1 from a working machine or bending machine for machining or processing an object 3 in one or more working steps. One embodiment is shown.

  The holding device 1 comprises a holder part 4 and a locking device 5 for clamping, i.e. pinching, an object 3 which is preferably in the form of an elongated object such as a wire or a wire blank.

  The holder part 4 has a seat part 7 for the object 3. The seat portion 7 is, for example, one or more portions that extend toward the seat portion 7 and guide the object toward the seat portion so that the object supplied to the work machine is a target position in the holding device 1. Take the form of one or more surfaces in

  According to the embodiment illustrated in FIGS. 1 and 2, the locking device 5 includes a locking member 9 having a locking projection 10 or equivalent and a drive member 11 in the form of a piston cylinder. In the present embodiment, the locking member 9 is fixed to the movable portion 14 of the driving member 11. The movable part is a piston rod part of a piston cylinder. The cylinder portion 15 is suspended from the holding device 1 so as to be pivotable. Details will be described below.

  In the open position, the seat 7 is arranged to be accessible for supply of the object 3 to the seat 7. In the closed position, the locking member 9 locks or holds the object 3 in the seat 7 through application of pressure by a piston cylinder for tilting the locking member 9 downward with respect to the seat 7. Arranged and the object 3 is arranged between them so that the object 3 is clamped as in the nip in a working position for at least one working step. The object 3 cannot move or rotate in the seat portion 7. For example, when the object 3 is rotated about its axis for a work step to achieve another range of bending, bending in another direction, or bending of the object 3 in additional dimensions, the device 1 As described in detail below, the holder portion 4 and the locking member 9 are arranged to be rotatable around the rotation center 34 in the closed position, that is, while supporting the object 3.

  The locking projection 9 of the locking member 9 is used to ensure that the object 3 supplied to the seat 7 or the switch element 4 is guided or is in the intended position in the seat 7 and In order to ensure that objects of various dimensions can be secured by the locking member 9 in the locking position in the seat 7, one or more inclined or angled edges or surfaces can be provided.

  The center of rotation of the holder part 4 and the locking member 9 coincides with the longitudinal axis of the object 3 at its adopted position in the seat part 7 or the space for the object 3 in the seat part 7 or substantially Matches.

  The holder part 4 does not enter the limited space that is away from the center of rotation, that is, the seat part 7 or adjacent to the region that engages with the object 3 to fix the object 3 to the work machine. Attached to the bearings. Therefore, in this embodiment, the holder portion 4 is rotatably supported by the suspension device 2 using the upper and lower force / motion transmitting support arms 17 and 18 which are two in number. The upper and lower force / motion transmitting support arms 17, 18 have front ends 19, 20 that are articulated to the holder portion 4 at upper and lower pivot points 21, 22 at the front. The support arms 17 and 18 are supported by the suspension device 2 via the lateral arm 23, upper and lower intermediate pivot points 24 and 25, and an intermediate pivot point 26. The support arms 17, 18 also extend rearwardly from the lateral arms and are linked to the central center of rotation 30 by the rear force transmitting lateral arms 29 via upper and lower pivot points 27, 28 at the rear. . The transverse arm 29 is arranged to be rotated by a rotatable drive shaft from a drive device 31 which is, for example, an electric motor schematically shown.

  As a result, the support arms 17 and 18 together with the lateral arms 23 and 29 and the holder portion 4 can rotate the drive device 31 from the drive shaft 30 to rotate the holder portion 4 and the seat portion 7. For example, a parallel mechanism for force / motion transmission that converts the rotational motion of the fixed object 3 that is a wire is formed. The rotational movement of the holder portion 4 is fixed to the holder portion 4 in an articulated manner when the support arms 17 and 18 are separated from the rotation center, and the force applied to the support arms 17 and 18 is a holder around the rotation center of the holder portion. This results from the fact that a torque is created in the holder part for rotation of the part. In this case, pressure is applied to one of the support arms, and tension is applied to the other of the support arms. In principle, the rotary motor can be replaced by a linear motor, such as a hydraulic or pneumatic piston cylinder, acting on one of the support arms 17, 18 in the longitudinal direction of the support arms 17, 18.

  In order to achieve a high stability of the holder part 4, a support mechanism 32 having a fixed support part is provided, in particular against tension applied to the object 3 in the longitudinal direction of the object 3. In this embodiment, the fixed support portion takes the form of a fixed support arm 33, is supported by the suspension device 2, extends forward toward the support portion forming portion in the support mechanism 32, and is movable with respect to the holder portion 4. It is. This is formed on the rear side of the holder part 4 at the same height as the seat part 7, that is, at the same height as the center of rotation of the holder part 4. It coincides with the longitudinal axis 34 of the object 3 which is the longitudinal axis. A fixed support surface 36-40 is disposed at the front end 35 of the support arm 33, and the fixed support surface 36-40 is configured to contact a corresponding movable support surface 41-45 in the main body 46 of the holder part 4. (See FIGS. 2 and 3).

  The fixed support surfaces 36-40 are flat with at least one, in this embodiment two or three, concave, arc-shaped, more precisely fan-shaped support surfaces 36, 37, 38. In other words, the support surfaces 39 and 40 facing each other in the form of two flat arcs as in the present embodiment are included. The support surfaces 36, 37, and 38 have the seat portion 7, that is, the rotation center 34 as the center of curvature. In principle, their concavely curved surfaces may be flat. However, at that time, surface contact with the movable surface that comes into contact is not performed.

  The movable support surfaces 41-45 are best understood by looking at FIG. 2, with at least one, in this embodiment two or three, convexly curved, arc-shaped or fan-shaped support surfaces. And the support surface is in contact with the fixed, concavely curved support surfaces 36, 37, 38 and is therefore approximately the same size as the radius of curvature of their corresponding fixed support surfaces or their It has a smaller radius of curvature than the radius of curvature. In addition, there are one or two movable support surfaces 44, 45 that are opposite to each other but facing the fixed support surface, which are equally flat and substantially semicircular.

  In practice, the movable support surfaces 41-45 are formed at the arcuate, step-like tapered end portion 46 in this embodiment, inside the holder portion 4. Therefore, this end portion 46 forms a movable support portion and enters the recess 47 at the front end 35 of the support arm 33 under the rotational movement of the holder part 4 and passes through the recess 47.

  Therefore, when the movable support surface 41-45 of the support mechanism 32 is allowed to slide with respect to the fixed support surface 36-40 of the movable support surface 41-45, both in the stationary state of the holder portion 4 and during its rotation. , And arranged to be supported by the fixed support surface 36-40 through contact with the fixed support surface 36-40. One or a plurality of support surfaces come into contact with each other according to the force acting on the holder part 4 and according to an allowable range. Importantly, at least one movable support surface can contact a corresponding fixed support surface at least under load.

  The cross-sectional views of FIGS. 3, 4 and 5 and the front view of FIG. 6 show the structure of the holding device in more detail.

  FIG. 7 shows a work table, track, guide bar or the like 48 in a bending machine for bending an object 3 such as a wire or wire blank using a bending tool 49. A clamp or holder for the wire 3 and / or a gripping tool for fixing the wire 3 during bending is indicated by reference numeral 50. Such a clamp 50 takes up space along the wire 3 and is particularly suitable if a holder is additionally arranged between the two clamps 50 shown to fix the wire during the bending process. This means that the wire cannot be bent along the wire length. In the figure, the holding device 1 is shown schematically in order to show that the use of the holding device 1 according to the invention only prevents the application of bending from being of a short wire length. As can be seen in the figure, the locking device 9 of the holding device 1 has a minimum width. Therefore, the bending machine of the present embodiment has a fixed central holder 1 for the wire 3 for fixing the wire 3 first and rotating the wire 3 about its longitudinal axis, and the length of the wire 3. It is of the type having two wire holders 50 that are movable in the direction and integrated with the movable bending tool. The movable bending tool moves between two selected positions along the wire where bending occurs in the relative direction selected by the rotational position for the wire selected by its central holder for each bend.

  FIG. 8 shows the wire 3 that is bent 51 adjacent to the locking device 5 of the holding device 1. The length of the wire 3 that cannot be bent is indicated by reference numeral 1. The corresponding bend 52 when using commonly found tools and holders is shown in FIG. It can be seen that the length l of the wire 6 where the bending 52 cannot be applied is considerable.

  It can therefore be clearly understood that the use of the holding device 1 according to the invention opens up new design approaches and configurations of products with a desirably improved design, or possibilities for the manufacture of new products. . Furthermore, the apparatus 1 has a simple configuration with high operational reliability and can be realized at low cost. In addition, it can be easily accessed for scheduled maintenance and adjustment, and this can be seen to be necessary for repair. However, it is important that the bend 52 can be performed in the immediate vicinity of the device 1 occupying only a short length l of the wire 6. The ability to bend 52 near the holding device 1 provides stability to the work process. The operational problems that often occur with known devices due to the lack of space are completely eliminated when the device 1 according to the invention is used.

  The object or wire 6 can be bent along its range in a bending machine and two-dimensionally bent by a plurality of tools. Through the radial rotation of the wire during the bending process using the device 1 or the holder 2 according to the invention, the wire can be bent in other directions and become a curved object extending in three dimensions. Therefore, the wire is set to rotate at a relatively large rotation angle one or more times during the machining process.

  It is possible to modify the device according to the invention without departing from the scope of the inventive concept. Therefore, the apparatus is not limited to that shown and described in connection with the embodiments, but is only specified by the appended claims. For example, the movable support portion may have a shape of a recess or a groove into which the fixed portion enters.

Claims (8)

An apparatus for holding an object, preferably an elongated object such as a wire blank, in a working position in a work machine for machining or processing the object in one or more work steps, and optionally An apparatus for rotating the object during the process,
A holder portion having a seat for the object where the object is held during the work process;
The holder portion is arranged to be rotatable about a center of rotation that coincides with or substantially coincides with an axis of the object in the range of the object in the seat;
The holder part is interposed between the drive device and the holder part via a plurality of pivot points arranged away from the center of rotation to create a torque acting on the holder part for rotation of the holder part. Supported by a fixed support device by a motion transmission mechanism comprising a support arm connected to
A locking device configured to switch the locking member between a fixed position and a release position for the object in the seat,
Between the support device and the holder part, a support mechanism is arranged at the same height as the seat part,
The support mechanism has a fixed support portion having a fixed support surface that contacts a movable support surface in the movable support portion that can move together with the holder portion.
apparatus. At least one of the movable support surfaces in the movable support portion has an arc-shaped range having a center of curvature coinciding with the rotation center of the holder part.
The apparatus of claim 1. At least one of the fixed support surfaces in the fixed support portion has the same shape as the corresponding movable support surface;
The apparatus of claim 2. The movable support portion is formed as part of an arc and is configured to enter a recess in the fixed support portion for support and guidance.
The apparatus of claim 3. The device is
In combination with the holder part or the main body included in the holder part, or having a locking device that forms part of the holder part or the main body,
The apparatus of claim 1. The locking device has a locking member,
The locking device or the locking member is configured to be able to switch between an open position and a closed position,
The seat is configured such that the seat is accessible in the open position;
In the closed position, the locking member is configured to fix or lock the object at the holder portion or the seat portion.
The apparatus according to claim 5. The locking member holds, locks, and / or secures the position of the object in the seat, and guides the object to a target position in the seat as necessary. Having a locking projection or equivalent,
The apparatus according to claim 6. One end of the support arm is combined with the holder part or the main body,
The other end of the support arm is combined with a drive device, or a drive shaft having the drive device or an equivalent thereof,
The two support arms are configured to be displaceable from each other in the device while maintaining parallelism or parallel motion of each other;
Apparatus according to claim 2, 3 or 4.

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