JP5255582B2 - Spring making machine - Google Patents

Abstract

The machine has a mandrel (16) movable perpendicular to a fed wire and in a vertical direction and a direction perpendicular to a machine frame. A forming tool (15) i.e. 3-dimensional winding finger, is movable parallel to a feeding direction and in two directions (v, y) that are perpendicular to each other and to the feeding direction. The mandrel has a wire guiding cable (27) formed at a distance from an external side wall (31) that is turned away from the frame. The cable guides the wire to the tool via the mandrel, where the wire is guided to the cable via an opening (46) of the mandrel.

Description

  The present invention also includes a wire entry portion, a wire guide portion for guiding the wire in the supply direction, and further provided in the subsequent stage of the wire guide portion so as to be orthogonal to the supplied wire. A spindle that can also move in a direction orthogonal to the machine frame, and a spindle that can move in two directions parallel to the wire supply direction and in two directions perpendicular to the wire supply direction. The present invention relates to a spring manufacturing machine having a machine frame to which a forming tool is attached.

  Various corresponding machines are known for producing compression springs. In this case, a one finger system, i.e. one movable coiling finger forms a wire into a spring and a two finger system machine (two movable coiling fingers form a wire into a spring. ).

  Among these known machines, one-finger system machines can be used particularly flexibly and can cover various types of springs. However, the accuracy of springs made with such machines is usually inferior to that of two-finger system machines, as is the time production of the machine itself.

  Two-finger system machines are also suitable only for the production of pure coil springs without bent legs. This is because the wire rod is always positioned in the wire rod guide groove of the coiling finger once it arrives. A two finger system cannot produce more numbers and more accurate spring shapes than a one finger system.

  A known spring manufacturing machine according to Patent Document 1 can be used for either a one-finger system operation or a two-finger system operation, and can be switched appropriately. Both drives of the two-finger system provided in this machine can also be used for the operation of the one-finger system. In this known machine, the spindle is used as a normal cutting spindle. When the machine works with a one finger system, the forming tool cannot move perpendicular to the machine wall. Therefore, the spring cannot be bent forward.

  A known spring making machine according to US Pat. No. 6,057,096 works on the principle of a one finger system, and the forming tool is movable in two directions. In this case, the cutting part, the pitch member, and the bending member can move perpendicularly to the movement direction of the forming tool, but cannot be bent forward.

  Patent Document 3 discloses a spring manufacturing machine that operates with a one-finger system and allows a coiling tool to move in three directions perpendicular to each other. In this known machine, a separate tool is used for bending, but it has the disadvantage that it must be lowered from above to bend forward.

  In addition to this, there are many known spring manufacturing machines that work with a one-finger system and the forming tool is operated and moved in various ways (Patent Document 4, Patent Document 5, Patent Document 6, Patent Document 7), All of these have the disadvantage that they cannot form a forward turn.

US Patent Application Publication No. 20080264132A US Pat. No. 4,873,854 US Pat. No. 5,706,687 Japanese Patent Laid-Open No. 11-285758 JP 2002-059233 A JP 2004-209527 A US Pat. No. 7,107,806

  Starting from the above, the object of the present invention is to improve a spring winding machine, which is usually only suitable for the production of pure coil springs (compression springs) with a two-finger system, with a simple leg spring with a one-finger system. It is to be able to be used for manufacturing purposes.

  The problem is that in a spring making machine of the kind described at the outset according to the invention, the spindle has a wire guide path, which is located on the outside of the spindle facing away from the machine frame of the spindle. It is formed by being separated from the side wall, and the supplied wire is guided to the forming tool through the spindle, and further, the spindle has an opening for introducing the wire into the wire guide path.

  In the present invention, the spindle is movable in the vertical direction and the front-rear direction on a plane perpendicular to the wire feed direction, so that the spindle can be moved in two directions perpendicular to each other and to the wire feed direction. By using a movable forming tool ("3D coiling finger"), in addition to coiling of wire rods, bending can be performed in any direction (up and down, front and back). As a result, leg springs can be manufactured in almost any leg position and shape. The production of forward bent legs can also be carried out without the use of additional tool units or tool slides. At the same time, the possibility of manufacturing a highly accurate spring with a large amount of time production by the two-finger coiling method is maintained.

  According to the present invention, a conventional spring winding machine working with a two-finger system can be easily switched to a one-finger system. In this case, by exchanging the forming unit, the spindle unit, and in some cases, the cutter and the wire guide part, the types of products that can be manufactured by the machine can be greatly expanded as a whole. The economic effects achieved by the present invention are very noteworthy.

  In the spring manufacturing machine according to the present invention, it is particularly preferable that the wire guide path is formed in the form of a guide groove, and more preferably the groove depth is at least equal to the diameter of the supplied wire so that the wire passes through the guide groove. It is designed not to jump out of the guide groove. This offers the possibility of forming the wire guide path with a closed cross section.

  It is particularly advantageous when the wire guide path is formed in the form of a guide groove having a cross-section that is not closed and open on one side, but the wire guide path is at the side part facing away from the machine frame. Is connected to the outer side wall of the spindle through a flat boundary wall extending perpendicularly to the longitudinal center plane of the spindle and parallel to the wire supply direction. Preferably, the flat boundary wall is connected to the wire supply direction. Having a width greater than the diameter of the wire in a direction perpendicular to the wire.

  In another advantageous configuration of the invention, the opening for introducing the wire into the wire guide path extends just beside the boundary wall and extends beyond the entire length of the spindle in the wire feed direction. Preferably, the opening has an opening width that is equal to or slightly larger than the diameter of the wire in a direction perpendicular to the flat boundary wall, and the wire can be easily passed from the outside through the opening to the wire guide path. It is possible to introduce without difficulty.

  In the spring manufacturing machine according to the present invention, when the wire guide path is formed as a guide groove, the longitudinal center plane of the guide groove is configured to extend perpendicular to the flat boundary wall.

  In another advantageous configuration of the spring making machine according to the invention, the spindle is composed of two parts, having an upper spindle part and a lower spindle part. In this case, preferably, both spindle parts are formed in one of the spindle parts of the two spindle parts toward the separation surface between the two spindle parts in order to create an opening for introducing the wire into the wire guide path. From the closed position where the open wire guideway is completely covered and closed by the other spindle part, the wire guideway is opened and an opening for introducing the wire into the wire guideway between the two spindle parts Can be brought into the open position where the part is produced. When the spindle is composed of two spindle parts according to the present invention, the opening for introducing the wire into the wire guide path is created only when the wire is led out from the wire guide path or introduced into the wire guide path, In other cases, it is possible to close the guide path section by overlapping the two spindle portions for guiding the wire rod one above the other. This is much preferred over a configuration in which the wire guide path is open within the guide groove frame which is always open on one side.

  The preferred configuration of the two parts of the spindle is that both spindle parts can be pivoted around a common hinge and can be opened like a bowl at that time. Both spindle portions can be opened to create an opening to do (or derive), thereby reaching the wire guide path as desired. However, after the introduction or withdrawal of the wire has been carried out, both spindle parts are closed again, whereby a closed wire guide path is achieved.

  Another preferred configuration of the two-part spindle is capable of moving away from each other while maintaining their positional relationship so that both spindle parts assume an open position and thus face each other in parallel.

  Further, in the configuration composed of two parts of the spindle, the spindle part in which the wire guide path is formed in the form of a guide groove is in the closed position of the spindle, and the outside of this spindle part is projected by the protruding part protruding from the other spindle part. In the closed position, the projection is in contact with the outer boundary surface of the spindle portion having the wire guide path and covers the wire guide path. This provides high rigidity when bending forward.

  In another preferred configuration of the spring manufacturing machine according to the present invention, an arc-shaped bending surface for additionally bending the supplied wire rod is formed on the spindle, and the curvature axis of the bending surface is the wire rod. Is perpendicular to the supply direction. In this case, the bending surface is preferably provided on the spindle while being shifted in a direction perpendicular to the longitudinal center plane of the wire guide path. More preferably, the curvature axis of the bending surface is located perpendicularly or parallel to the longitudinal center plane of the wire guide path.

  Also, a particularly preferred configuration of the present invention is that the depth of the guide groove is such that the spindle is composed of two parts and both parts can be brought from the closed position to the open position (and vice versa). Is selected to be smaller than the diameter of the wire, and the spindle is still movable in the wire feed direction (and the reverse direction). As a result, the spindle can be used as a holding member for the wire at the same time, and the wire is clamped between the two spindle portions in a closed position.

Finally, the invention also relates to a spindle with the above-mentioned features for use in a spring making machine of the kind described at the outset.
In the following, the present invention will be described in detail with reference to the drawings by way of principle illustration.

1 is a perspective view (viewed from diagonally forward) of a spring manufacturing machine (spring winding machine) according to the present invention arranged in a one-finger system. FIG. The enlarged view (perspective view) of the shaping | molding range of the spring manufacturing machine according to FIG. FIG. 2 is a schematic perspective view of components involved in forming in the machine according to FIG. 1 (shown with spaces between the individual elements). FIG. 3 is a principle diagram of various embodiments of a spindle viewed from different viewpoints. FIG. 3 is a principle diagram of various embodiments of a spindle viewed from different viewpoints. FIG. 3 is a principle diagram of various embodiments of a spindle viewed from different viewpoints. FIG. 3 is a principle diagram of various embodiments of a spindle viewed from different viewpoints. FIG. 3 is a principle diagram of various embodiments of a spindle viewed from different viewpoints. The expansion perspective view which looked at the element (only corresponding to FIG. 3) (only corresponding) to shaping | molding at the time of the manufacture start of a leg spring from the diagonally forward direction of a wire supply direction. FIG. 10 is a perspective view corresponding to FIG. The perspective view seen from the wire material supply direction slanting front outside which shows one step at the time of completion | finish of manufacture of a leg spring. FIG. 11B is a perspective view of the same stage as in FIG. FIG. 11B is a perspective view of the next stage after the stage shown in FIG. FIG. 11B is a perspective view of the same stage as that in FIG. FIG. 11B is a perspective view of the next stage after the stage shown in FIG. FIG. 11B is a perspective view of the same stage as in FIG. FIG. 11B is a perspective view of the next stage after the stage shown in FIG. FIG. 11B is a perspective view of the same stage as in FIG. FIG. 11B is a perspective view of the next stage after the stage shown in FIG. FIG. 11J is a perspective view seen from the rear obliquely outside the wire supply direction, showing the same stage as in FIG. 11J

  FIG. 1 shows a perspective view of a spring manufacturing machine 1 working with a one-finger system as seen from the front. The spring manufacturing machine 1 is substantially composed of one machine frame 2 (simply shown as a principle diagram), its front side (similarly shown as a principle diagram), a straightening unit 3, a wire entry part 4, a wire guide. A part 5, a spindle unit 6, a molding unit 7, a pitch device 8 and a cutting unit 9 are arranged.

Since the structures and functions of the straightening unit 3 and the wire entry portion 4 are known per se, only this will be mentioned.
The wire 10 (see FIG. 9 and FIG. 10) is drawn from the wire stock (not shown) by a pair of rotationally driven rollers 11 from the wire entry portion 4 and straightened by several straightening rollers in the straightening unit 3. And is supplied in the wire supply direction s by the wire guide 5 of the forming unit 7 provided at the rear stage of the entry roller 11.

  Similarly, the pitch device 8 is known per se. The pitch device 8 can be moved outwards (perpendicular to the axis of the wire and perpendicularly forward from the machine frame 2) to produce a correspondingly desired pitch between the individual windings of the spring. become. The manner and use of such pitch devices are well known to those skilled in the art and need not be described in detail.

Further, the machine frame 2 is provided with a horizontal skid 12, that is, an upper slide and a lower side, and can move independently of each other in the directions t _u and t _o in parallel to the wire guide direction s.

  As can be seen in FIG. 1, two forming slides 13 (one on each horizontal skid 12) are provided obliquely on the horizontal skid 12, and each of them is inclined obliquely independently of each other by a cam swing 14. It can move in the direction of u or v on the orbit. In this case, with respect to the movement of the molding unit 7, any variation that allows free movement of the molding tool 15 (or a plurality of molding tools 15 when switched to the two-finger coiling system) on the molding surface is conceivable. If desired, both horizontal skids 12 may be connected.

  In the two-finger system, a molding tool 15 is provided at the front end of each molding slide 13, but the spring manufacturing machine 1 switched to the one-finger system shown in FIG. 1 has the molding tool 15 only on the lower molding slide 13. It is provided via an adapter plate 22. Here, the molding tool is a 3D coiling finger 23 (also referred to as a “leg spring device”) that serves as the molding unit 7. The 3D coiling finger 23 has a guide groove 28 for receiving, guiding, and turning the wire 10 on the end face directed to the spindle unit 6 (see FIGS. 9 and 10).

  The two-finger system (upper) forming slide 13, which is not required when switching to one finger, is removed or brought into the retracted position when switching to the one-finger system and remains there.

  The forming spindle 16 is fixed in a spindle box 17 (see a partial view in which the forming range in FIG. 2 is enlarged), and the spindle box 17 is slidably inserted into a spindle slide 18. Since the spindle slide 18 can move vertically in the w direction (perpendicular to the wire 10), the forming spindle 16 can always be directly positioned on the already wound wire. The spindle box 17 is movable forward and backward (also perpendicular to the wire 10) in the x direction. Both moving directions are indicated by arrows in FIG.

  Each of the spindle slides 18 is provided with a cutting slide 20 that is operated via one crankshaft 19, and each of the cutters 21 that cuts the springs produced on the cutting slide 20 (when working with a two-finger system). ) Is provided. In the spring manufacturing machine according to FIG. 1 switched to the one-finger system, the cutter 21 is provided only on the upper cutting slide 20 and is configured to immediately cut the wire at the outlet 25 of the wire guide 5 (FIG. 3). Refer to the following expression). In order to support the wire outlet 25, the lower cutting slide 20 is provided with an opposing cutter 30 that can contact the wire guide 5 from below. As an alternative, the wire 10 can also be cut by the spindle unit 6 moving in the w or x direction between the forming spindle 26 and the wire guide 5, so that a special edge is formed on the forming spindle 26 and the wire outlet 25. Is provided (not shown).

3D coiling finger 23 is oriented parallel to the essentially wire feed direction s, coiling by either both horizontal skid 12 moves in the direction of motion t _o and t _u, or forming a slide 13 is moved in the v direction It can be moved on the surface. Furthermore, the 3D coiling finger 23 can additionally be moved (turned) in the y direction perpendicular to the coiling plane via an additional drive 24 (FIG. 1). Thereby, the forming tool 15 of the 3D coiling finger 23 can be arbitrarily positioned with respect to the wire exit 25 of the wire guide 5 or moves around the wire 10 protruding from the wire exit 25 from above, below, rearward or frontward. It can act on the wire 10 (see also FIG. 3).

The forming spindle 16 is formed in two parts so that all the components involved in the forming can be recognized from the representation of FIG.
The forming spindle 16 has an upper spindle part 16a and a lower spindle part 16b, which are along a plane extending perpendicularly to the machine frame 2 (in the x direction) and parallel to the wire guide direction s. They are positioned above and below each other and are fixed in contact with each other (in an appropriate manner).

  As shown in detail in FIG. 3 which clearly requires reference, the lower spindle portion 16b is formed with a guide groove 27 that opens upward, extends parallel to the wire feed direction s, and has a cross-section. It is adapted to the diameter d of the wire (see FIGS. 7 and 9).

  The forming spindle 16 is movable along the axes of motion w and x so that the wire 10 is located in the guide groove 27 or at any other location or edge of the forming spindle 16. It can position with respect to the wire 10 (FIG. 9 and FIG. 10). With this positioning possibility of the forming spindle 16 and the degrees of freedom t, v, y of the 3D coiling finger 23, the wire 10 can be formed almost arbitrarily.

  According to FIG. 3, the guide groove 27 is separated from the outer surface 31 on the same side of the lower spindle part 16b by a projection 29 on the side facing away from the machine casing 2. The protrusion 29 makes it possible to produce, for example, a leg bent in front of the spring (see also FIGS. 9 and 10 or FIGS. 11A to 11K). A flat boundary wall 32 that is perpendicular to the longitudinal center plane MM (see FIG. 7) of the guide groove 27 and parallel to the wire supply direction s is formed above the protrusion 29. ing. The boundary wall 32 forms the upper boundary surface of the protrusion 29, and connects the upper end portion of the outer side portion of the guide groove 27 and the outer surface 31 of the lower spindle portion 16b.

As can be seen from FIG. 6 (left figure), the width B of the upper boundary wall 32 is larger than the diameter of the wire. The depth T of the guide groove 27 is slightly larger than the diameter of the wire.
Further, as shown in FIG. 3, the lower surface of the upper spindle portion 16a protrudes from the upper surface of the lower spindle portion 16b in the forward direction so as to overhang the guide groove 27 in the lower spindle portion 16b.

  Further, the upper spindle portion 16a is equipped with a rounded portion 35, particularly a curved portion 35, at the front end portion, so that the supplied wire rod 10 can be bent on a corresponding surface.

  However, the arc-shaped bending surface 35 provided here has a different positional relationship with the forming spindle 16, for example, the curvature axis A of the bending surface 35 is the longitudinal center plane MM of the guide groove 27 (see FIG. 7). ), Or can be attached so as to be shifted in parallel with it.

  As shown in the drawings, in the configuration of the forming spindle 16, the bending axis A of the curved surface 35 is perpendicular to the wire guide direction s and perpendicular to the machine frame 2 (hence the axis x). (Parallel to).

  In the illustrated embodiment of the bending surface 35, as shown in FIG. 3, the bending surface 35 extends in a circular arc shape slightly beyond the quadrant, that is, substantially the entire length of the forming spindle 16 as viewed in the wire feed direction s. And extends completely to the upper front end of the upper spindle portion 16a, as shown in FIG.

However, other positional relationships and arrangements are entirely possible, as seen for example in FIG. 5 or FIG. 8, which will be described in detail below.
In the embodiment shown in FIGS. 3, 9 and 10, the end directed outward (forward) of the forming spindle 16 is the boundary surface 32 of the lower spindle portion 16 b and the bending surface of the upper spindle portion 16 a. 35, an opening 46 is created that can be reached from the outside of this arrangement. The width h of the opening 46 (perpendicular to the boundary wall) continuously increases in the wire supply direction s (see FIG. 3).

  The opening 46 extending over the entire length L of the forming spindle 16 (as viewed in the wire supply direction s) is the width at the narrowest cross-sectional position located at the start point of the length L immediately next to the outlet 25 of the wire guide 5. h. The width h is set so that the fed wire 10 can be introduced into the opening 46 from the outside in consideration of the diameter d and then fed into the guide groove 27. In this case, all the necessary relative movement can be carried out by moving the forming spindle 16 relative to the wire 10 in the w or x direction of the spindle 16.

  4 to 8 are schematic views of different embodiments of the forming spindle 16 as viewed from the front side of the forming spindle 16 in the direction opposite to the wire supply direction s. In the figure, broken lines indicate possible positions of the wire 10 for bending, and arrows indicate possible bending directions.

  In the embodiment comprising one part of the forming spindle 16 shown in FIG. 4, an L-shaped path 33 is provided inside and leads to the opening 46 outside the forming spindle 16. A wire rod is introduced through this opening 46 and can be fed into the leg, here upwardly directed, of the path 33 forming the guide groove 27. Different positions of the wire introduced into the path 33 are indicated by broken lines, and possible bending directions for each of these different wire positions are indicated schematically by small arrows.

  A similar molding spindle 16 shown in FIG. 5 is formed of two parts, an upper spindle part 16a and a lower spindle part 16b. The upper representation is the same side view as FIG. 1, but the lower representation shows a plan view of the lower spindle portion 16b viewed from above (with the upper spindle portion 16a removed). Both spindle parts 16a and 16b together form an L-shaped path 33, but in this case the legs of the L-shaped path 33 forming the guide groove 27 extend downward. A rounded portion 35 ′ is provided as a bending surface in the front stage of the guide groove 27 when viewed in the direction of introduction of the wire, and the bending axis thereof is on the longitudinal center plane MM (see FIG. 7) of the guide groove 27. The spring body coiling is facilitated by being positioned in parallel to each other.

  FIG. 6 also shows a forming spindle 16 having two parts, an upper spindle part 16a and a lower spindle part 16b. This configuration is the same as that shown in FIGS. 1-3 and 9-11K. The bending area with the arcuate bending surface 35 is rounded upwards as can be clearly seen from FIG. 3 or FIG. 9 and FIG. Here, the expression on the right side of FIG. 6 shows a front view of the upper molding spindle portion 16a (the figure on the left side as viewed from the left side).

  The illustrated example shows the manufacture of a right-handed spring. Although not shown in the figures, it goes without saying that a left-handed spring can be manufactured when using the present invention. All that is necessary to manufacture the left-handed spring is to replace the forming spindle 16 and the wire guide 5 with a new forming spindle and a new wire guide. In this case, each of these elements is arranged so that the illustrated representation is perpendicular to the longitudinal center plane MM and opposite to the plane passing through the longitudinal center axis of the wire guide path (guide groove 27). Consists of a copied arrangement.

7 and 8 show the closing function of the two-part molding spindle 16, respectively.
In the embodiment according to FIG. 7, the upper spindle portion 16a and the lower spindle portion 16b can pivot in a bowl-like manner around a rotation shaft 36 (mechanism or driving device not shown). In the closed position (representation on the left side of FIG. 7), the wire is in the wire guide 27 with a closed cross-section and is completely enclosed by the forming spindle 16 when the forming spindle 16 passes in the closed position. Has been.

  In this closed position, the upper spindle portion 16a is covered with the outer surface 31 of the lower spindle portion 16b in which the guide path 27 is formed by a protrusion 37 protruding downward on the outer side (left side in FIG. 7). .

  The spindle unit 6 shifts from the closed position shown on the left side of FIG. 7 to the open position shown on the right side of FIG. At this time, an opening 46 is formed between the front projection 37 projecting below the upper spindle portion 16a and the boundary wall 32, and the wire 10 is introduced from the outside into the guide groove 27 through the opening 46. Alternatively, it can be derived from the guide groove 27.

The protrusions 37 and 29 support each other outwardly in a position where the molding spindle 16 is closed, thereby increasing rigidity when bending forward (that is, leftward in FIG. 7).
Finally, FIG. 8 shows another embodiment of a two-part molding spindle 16, again on the left side in the closed position and on the right side in the open position.

  Here, in the open position (representation on the right side of FIG. 8), the upper spindle part 16a and the lower spindle part 16b are no longer connected to each other. On the contrary, in order to create an opening 46 for reaching the guide groove 27, the two spindle parts 16a and 16b are moved away from each other in parallel without changing their positional relationship. Again, this can be done by a simple mechanism (for example, a bell crank, an opening member, a cam mechanism, an electric motor, etc., none of which are shown), and those skilled in the art are well aware of suitable mechanisms or driving devices. ing.

  Further, in this embodiment, the upper spindle portion 16a is composed of elements 38 (spindle member 1) and 39 (spindle member 2) connected to each other. Therefore, for example, a rounded bending surface 35 ″ or the like can be realized by an intermediate member of the forming spindle 16.

  The structure of the forming spindle 16 comprising a plurality of parts simplifies the production of the individual spindle members 16a, 16b, 38 or 39, and by replacing the spindle parts 16a, 16b or the spindle members 38 or 39, the path 33 or The shape of the molding surfaces 28 and 35 can be changed.

  The molding spindle 16 shown in FIGS. 7 and 8 can also be configured as a gripping member that can grip and position the wire rod 10, leg, or spring body by using a movable spindle portion. It arises as another possibility to use. For this purpose, the forming spindle 16 is configured to be movable also in the wire feeding direction s, the depth T of the guide groove 27 is selected to be slightly smaller than the diameter d of the wire rod, and both spindle portions 16a and 16b are in their closed positions. Holding the wire in between is achieved.

The mounting direction of the guide path 27, that is, for example, the upper side (example of FIG. 4) or the lower side (examples of FIGS. 5 and 6) is arbitrary and can be selected individually depending on the application or desired spring shape.
In addition to the above embodiments having rounded spindle portions 35 or 35 'or 35 ", many other variations are possible. For example, it has been found advantageous to additionally polish the end face of the spindle 16 so as not to hinder the wire at all. In this case, the end face is usually configured as a corresponding free-form surface that is not precisely defined geometrically.

  FIGS. 9 and 10 show the molding element shown in FIG. 3 from two different viewpoints in the state of bending the leg 40 facing forward. That is, FIG. 9 is a perspective view as seen from diagonally forward, and FIG. 10 is a perspective view of this arrangement as seen from diagonally rear.

In this case, the wire 10 passes through the guide groove 27 and is bent at the protruding portion 29 via the hollow portion 15 provided in the forming tool 15 as the forming tool 15 moves forward.
The transition from the guide groove 27 to the outward bending direction at the end of the guide groove 27 is facilitated by the roundness 42 provided in the protrusion 29.

  Finally, FIGS. 11A to 11K show the various stages in the manufacture of the spring 43 with the bent legs 44 in principle perspective views of different forming elements. The drawings arranged side by side on the left and right show the same work steps in different perspective views, and in the expression on the left, the movement order of the individual tools is also indicated by arrows.

  FIG. 11A and FIG. 11B show a state in which the wire 10 is unloaded through the forming spindle 16 through the wire guide portion 5 and the guide groove of the lower spindle portion 16b. As the forming tool 15 moves in the direction of the forming spindle 16 and from top to bottom (movement along the movement axes t and v), the wire 10 is at the rear edge of the forming spindle 16 (ie at the lower spindle portion 16b). ) Folded, thereby creating the first bent leg 44.

  Subsequently, the forming tool 15 moves away from the wire 10 in the right direction, turns around behind the wire 10 and descends, and is again applied to the wire 10 from below. At the same time, the wire 10 is fed a little forward, the forming spindle 16 is lowered and shifted slightly backward, and the rounded bending surface 35 is applied to the wire 10 (position according to FIGS. 11C and 11D).

  Next, when the forming tool 15 is raised and the wire feeding is activated, the spring body 47 is produced by coiling. The pitch device 8 can move perpendicular to the wire 10 to create a spacing between the individual windings. This state is shown in FIGS. 11E and 11F.

  After the spring body 47 is completed, the forming tool 15 moves away from the wire rod 10, turns down behind the wire rod 10, and is positioned in the spring body 47 from the rear. At this time, the wire feeding is activated, and then the second leg is bent by lowering the forming tool 15. This bending can be done either freshly (as at the start) in the guide groove 27 of the forming spindle 16 or at the projection 29 (see FIGS. 11G and 11H).

  Finally, as shown in FIGS. 11J and 11K, the spring 43 is released by the retraction of the forming spindle 16 and the forming tool 15. Corresponding leg lengths are produced by feeding the wire 10, and the completed spring 43 is cut when the opposing cutter 30 is raised and the cutter 21 is lowered.

  The new spring manufacturing process can then be started again.

Claims (13)

Wire rod entry portion (4), wire rod guide portion (5) for guiding wire rod (10) in the supply direction (s), and further, wire rod provided provided at the subsequent stage of wire rod guide portion (5) A spindle (16) movable in the vertical direction (w) so as to be perpendicular to (10) and in the direction (x) perpendicular to the machine frame (2), and in the subsequent stage of this spindle (16) A forming tool (15) movable in parallel to the wire supply direction (s) (t) and in two directions (y, v) perpendicular to each other and the wire supply direction (s). In the spring making machine (1) with the machine frame (2) attached,
The spindle (16) has a wire guide path (27) which is arranged in the spindle (16) on the outer side wall (opposed to the machine frame (2) of the spindle). 31), the supplied wire rod (10) is movable to the forming tool (15) through the spindle (16), and further through the opening (46) of the spindle (16). introducible der to Te wire guide path (27) is, the wire guide passage is formed in the guide form a groove (27), the guide groove (27) through an opening (46) of the spindle (16) A spring manufacturing machine (1) characterized in that it communicates with the outside and is L-shaped in cross-sectional view . The spring manufacturing machine according to claim 1, wherein the opening (46) has a width corresponding to at least the diameter of the wire (10) . The spring manufacturing machine according to claim 2, characterized in that the guide groove (27) has a groove depth (T) which is at least equal to the diameter (d) of the wire (10). The guide groove (27) is perpendicular to the longitudinal center plane (MM) of the wire guide path (27) at the side portion facing away from the machine frame (2) and in the wire supply direction (s). Spring manufacture according to claim 2 or 3, characterized in that it is connected to the outer side wall (31) of the spindle (16) via a flat boundary wall (32) extending parallel to (t). Machine. The spring manufacturing machine according to claim 4, characterized in that the wall (32) has a width (B) greater than the diameter (d) of the wire in a direction perpendicular to the wire supply direction (s). The opening (46) for introducing the wire (10) into the wire guide path (27) extends right next to the boundary wall (32), and is the total length (L) of the spindle (16) in the wire supply direction (s). The spring manufacturing machine according to any one of claims 1 to 5, wherein the spring manufacturing machine extends beyond the upper limit. The opening (46) for introducing the wire (10) into the wire guide path (27) has an opening width (h) equal to at least the diameter (d) of the wire in the direction perpendicular to the flat boundary wall (32). The spring manufacturing machine according to claim 6, further comprising: The spring manufacturing machine according to any one of claims 1 to 7, characterized in that the spindle (16) is composed of two parts, and has an upper spindle part (16a) and a lower spindle part (16b). An arc-shaped bending surface (35 ') for additionally bending the supplied wire rod (10) is formed on the spindle (16), and the curvature axis (A) of the bending surface (35') is the wire rod. The spring manufacturing machine according to any one of claims 1 to 8, wherein the spring manufacturing machine is perpendicular to the supply direction (s) of (10) . The bending surface (35 ') is provided on the spindle (16) so as to be shifted in a direction perpendicular to the longitudinal center plane (MM) of the wire guide path (27). The spring making machine described . The spring manufacturing machine according to claim 1, wherein the guide groove (27) is formed by rotating an L shape in a cross-sectional view by about 90 ° along a counterclockwise direction. The spring manufacturing machine according to claim 1, wherein the guide groove (27) is formed by rotating an L shape in a cross-sectional view about 180 ° along a counterclockwise direction. A spindle (16) having the features of any one of claims 1 to 12 for use in a spring making machine (1) according to the premise of claim 1 .

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