Molding machine with cutting device

Abstract

The molding machine (100) has a molding station (91) and a cutting device (1). The cutting device (1) cuts rod portions (W) from a bar stock and supplies the cut rod portions (W) to the molding station (91). The cutting device (1) includes a cutting carriage (2) that can move back and forth and a cutting blade (30) attached to the cutting carriage (2). The cutting blade (30) enables the rod portions (W) to be cut from the bar stock and supplied to the molding station (91) while the cutting carriage (2) is moving forward. The cutting device (1) includes means for adjusting the stroke and direction of the forward movement of the cutting carriage (2). In this way, the cut rod portions (W) can be optimally positioned at the molding station (91).

Description

[Technical Field]

[0001] The present invention relates to a forming machine having a forming station and a cutting device for cutting rod portions from a rod stock, as defined in the preamble of claim 1, and to a forming station and a method for cutting rod portions from a rod stock, as defined in the preamble of claim 10. [Background technology]

[0002] Multi-stage molding machines including multiple forming stations arranged in succession and each having a cutting device for cutting rod sections from the bar stock are known in the prior art. Such machines, in particular, include a cutting device that is used not only to cut rod sections from the bar stock but also to feed the cut rod sections to the first forming station. German Patent Application No. 2940375C2 discloses such a machine, in which the cutting device includes a cutting carriage movable back and forth and a cutting blade attached to the cutting carriage. The cutting blade allows the rod sections to be cut from the bar stock and then fed to the first forming station during the first forward movement of the cutting carriage. The cutting carriage is driven by a double cam via a double roller lever. This method makes it impossible to adjust the position of the cut rod section at the first forming station, especially during operation without stopping the machine. This is disadvantageous because, due to the cutting, the cut rod section usually has an irregular geometry and its center of gravity is not always located at the axis of rotation. Therefore, to obtain an optimal volume distribution at the first forming station, the cut rods should be positioned in an optimal way at the first forming station. This can be achieved, for example, by adjusting the position using an adjustment plate and adjustment screws, but this results in long machine downtimes. This becomes even more problematic as the adjustment procedure may have to be repeated several times until the volume distribution at the first forming station is uniform. Summary of the Invention

[0003] Against this background, the problem underlying the present invention is to provide a forming machine with a forming station and a cutting device, and a method for cutting rods from a rod stock of the type mentioned at the outset, in which the position of the rods cut from the rod stock and fed to the forming station can be optimally adjusted in a simple manner at the forming station, possibly without completely stopping the machine.

[0004] This problem is solved by a forming machine and a method for cutting rods according to the invention as defined in independent claims 1 and 10. Particularly advantageous developments and embodiments are evident from the dependent claims.

[0005] The essence of the present invention regarding the molding machine is as follows: the molding machine has a molding station and a cutting device, and the cutting device is for cutting rod portions from a bar stock and supplying the cut rod portions to the molding station. The cutting device includes a cutting carriage that can move back and forth (forward and backward movement) and a cutting blade attached to the cutting carriage. By the cutting blade, the rod portions can be cut from the bar stock and supplied to the molding station during the forward movement of the cutting carriage. The cutting device includes means for adjusting the stroke and direction of the forward movement of the cutting carriage.

[0006] In the present disclosure, "rod" is to be understood as any shape of material having a definite longitudinal extent and any desired cross-section that is generally constant over that longitudinal extent. In particular, metal rods, bars, and wires of any dimensions fall under this definition. As a rule, the cross-section is circular, but the invention is not limited to this. The rod may extend along a straight line or may be wound.

[0007] "Moveable forward and backward" includes movement along horizontal, vertical and diagonal spatial directions.

[0008] Since the cutting device includes means for adjusting the stroke and direction of the forward movement of the cutting carriage, the position of the bar parts cut from the bar stock and fed to the forming station can be easily and optimally adjusted at the forming station, which results in significant time savings and reduced machine downtime compared to the prior art.

[0009] Advantageously, the means for adjusting the stroke and direction of the forward movement of the cutting carriage of the cutting device are configured to be able to adjust the stroke and direction of the forward movement of the cutting carriage during operation of the forming machine, and preferably include a control unit for controlling the means for adjusting the stroke and direction of the forward movement of the cutting carriage.

[0010] The ability to adjust the stroke and direction of the cutting carriage's forward movement while the forming machine is running means that a complete shutdown of the machine can be avoided while the position of the cut bar is adjusted at the forming station, resulting in significant time savings and reduced machine downtime compared to the prior art.

[0011] A control unit for controlling the means for adjusting the stroke and direction of the forward movement of the cutting carriage allows for easy operation of said means and, if necessary, automation.

[0012] Advantageously, the cutting device includes a variable stroke cutting carriage drive, by means of which the cutting carriage can be moved forward and backward, and such a cutting carriage drive allows for easy adjustment of the stroke of the forward movement of the cutting carriage.

[0013] The cutting carriage drive is preferably independent of the drives for the forming tools at the forming station described above and at other forming stations of the machine.

[0014] Preferably, the cutting carriage drive includes a hydraulic cylinder and a piston displaceable in the hydraulic cylinder, the piston being connected to the cutting carriage via a piston rod. With such a cutting carriage drive, a variable stroke controllable by the control unit can be easily realized.

[0015] Advantageously, the cutting carriage is pivotable about a pivot axis so as to adjust the direction of forward movement of the cutting carriage. By pivoting the cutting carriage, adjustment of the direction of movement can be easily achieved.

[0016] Preferably, the cutting carriage is movable back and forth transversely to the longitudinal direction of the rod, with the rotation axis extending parallel to the longitudinal direction of the rod.

[0017] The ability of the cutting carriage to move back and forth transversely to the longitudinal direction of the rod portion means that, during forward movement of the cutting carriage, rod portions can be cut from the rod material in a straight line transversely to the longitudinal direction of the rod portion, and the cut rod portions can be fed to the forming station in the same step.

[0018] Because the pivot axis runs parallel to the longitudinal direction of the rod, the position of the cut rod at the forming station is adjustable in a plane perpendicular to the pivot axis of the cutting carriage and the longitudinal direction of the rod, which, combined with the variable stroke of the cutting carriage, allows the cut rod at the forming station to be positioned at a specific location in that plane.

[0019] Advantageously, the cutting carriage is guided in a cutting carriage bearing, which is at least partially rotatable about a pivot axis, and the rotation of the cutting carriage and therefore the direction of the forward movement of the cutting carriage can be adjusted via the cutting carriage bearing.

[0020] Preferably, the means for adjusting the stroke and direction of the forward movement of the cutting carriage comprises a rotation angle adjusting device, which acts dispersively on the cutting carriage bearing and, during the adjustment, adjusts the rotation angle of the cutting carriage bearing, and which preferably comprises an eccentric. By means of such a rotation angle adjusting device, the rotation angle of the cutting carriage bearing and, therefore, the direction of the forward movement of the cutting carriage, can be easily adjusted.

[0021] In a preferred embodiment, the cutting carriage bearing is connected to at least one stationary mounting by at least one elastically deformable connection, which reduces maintenance efforts since no high-maintenance hinges are required.

[0022] The core of the present invention, with regard to the method, is as follows: In a method for cutting rod portions from a bar stock and supplying the cut rod portions to a forming station of a forming machine, the cutting device includes a cutting carriage movable back and forth and a cutting blade attached to the cutting carriage. During forward movement of the cutting carriage, the cutting device causes the cutting blade to cut the rod portions from the bar stock and supply them to the forming station. The stroke and direction of the forward movement of the cutting carriage are adjusted so as to position the rod portions at the forming station.

[0023] By adjusting the stroke and direction of the forward movement of the cutting carriage, the position of the bar that is cut from the bar and fed to the forming station can be easily and optimally adjusted at the forming station, resulting in significant time savings and reduced machine downtime compared to prior art.

[0024] The machine according to the invention and the method according to the invention for cutting rods are explained in more detail below with reference to exemplary embodiments shown in the drawings. [Brief explanation of the drawings]

[0025] [Figure 1]1 is a partial cross-sectional and partial perspective view of a portion of a molding machine having a cutting device when cutting a bar portion from a bar stock according to the present invention; FIG. [Figure 2] 2 is a partial cross-sectional side view showing the molding machine and a portion of the rod of FIG. 1, without showing some omitted mechanical components, and showing an enlarged detail view; [Figure 3] FIG. 2 is a perspective view showing the cutting device of the molding machine of FIG. 1 together with the cut rod portion; [Figure 4] 4 is a side view of the cutting device with the cut bar of FIG. 3, seen from the direction of the first forming station of the forming machine; [Figure 5] FIG. 4 is a perspective view showing a cutting carriage bearing of the cutting device of FIG. [Figure 6] 6 is a perspective view of the cutting carriage bearing of FIG. 5 from another perspective; [Figure 7] 2 is a perspective, partially cut-away view of the molding machine and part of the rod of FIG. 1, showing only diagrammatically represented components, and showing a cut-away rod centrally located at a first molding station; [Figure 8] 8 is a partial cross-sectional side view showing a portion of the molding machine and rod of FIG. 7, without showing some omitted mechanical components, and showing an enlarged detail view. [Figure 9] 8 is a perspective, partially cut-away view of the molding machine and a portion of the rod of FIG. 7, showing the cut-away rod in a displaced position to the right and to the right at the first molding station; [Figure 10] 10 is a partial cross-sectional side view showing a portion of the molding machine and rod of FIG. 9, without showing some omitted mechanical components, and showing an enlarged detail view. [Figure 11] 8 is a perspective, partially cut-away view of the molding machine and a portion of the rod of FIG. 7, showing the cut-away rod in a displaced position downward and to the left at the first molding station; [Figure 12] 12 is a partial cross-sectional side view showing the molding machine and a portion of the rod of FIG. 11, without showing some omitted mechanical parts, and showing an enlarged detail view. DETAILED DESCRIPTION OF THE INVENTION

[0026] The following notes apply to the following description: When reference numbers are not referred to in the drawings but are directly related to the description for the sake of clarity, reference should be made to the interpretation of these reference numbers in the preceding and succeeding descriptions. On the other hand, in order to avoid overcomplicating the drawings, reference numbers that are less relevant to immediate understanding are not included in all drawings. In such cases, reference should be made to other drawings.

[0027] 1 is a partial cross-sectional and partial perspective view of a portion of an exemplary embodiment of a molding machine 100 according to the present invention, where molding machine 100 is a multi-stage molding machine. Machine 100 includes a machine body 90 in which a plurality of successive forming stations 91, 92, etc., are arranged in a known manner for forming a workpiece in stages. Of the successive forming stations, only the die-side portion of a first forming station 91 and a portion of the die-side portion of forming station 92 are shown in FIG. 1.

[0028] The molding machine 100 further includes a cutting device 1, which is also attached to the machine body 90. The cutting device 1 allows a workpiece to be formed in the first forming station 91 to be cut from a bar material as a bar portion W and supplied to the first forming station 91. The bar material here is composed of a metal rod extending obliquely rearward from the bar portion W shown in FIG. 1, but the portion other than the bar portion W is completely hidden by the mechanical components of the molding machine.

[0029] The cutting device 1 includes a cutting carriage bearing 5 extending through a cylindrical opening in the machine body 90, at which the cutting carriage 2 is attached so as to be movable back and forth in the longitudinal direction. A sliding bush 50 is arranged in a sub-area of the cutting carriage bearing 5 between the cutting carriage 2 and the cutting carriage bearing 5, and the sliding bush 50 supports the cutting carriage 2 so as to be easily slidable.

[0030] As best seen in Figures 5 and 6, the cutting carriage bearing 5 has a hollow cylindrical body 51, which includes a longitudinally extending slot 52 on its upper side. The hollow cylindrical body 51 is connected to two mounting parts 58 and 59 via two connecting parts 56 and 57, respectively. The hollow cylindrical body 51, the two connecting parts 56 and 57, and the two mounting parts 58 and 59 are integrally formed. As shown in Figures 1, 3, 4, and 7 in particular, the cutting carriage bearing 5 is screwed to the machine body 90 via the two mounting parts 58 and 59 with screws 581, 582, 591, and 592, so that one side is fixed and stationary. The hollow cylindrical body 51 can rotate at a small angle relative to the stationary part of the cutting carriage bearing 5. As shown in Figures 1 and 2, the rotation axis A passes through the elastically deformable, relatively thin connecting parts 56 and 57. Because it is elastically deformable, there is no need for hinges, which require a lot of maintenance.

[0031] To rotate the hollow cylindrical body 51 about the pivot axis A, the cutting device 1 includes a pivot angle adjustment device 6. As can be seen particularly from FIGS. 1 to 4, the pivot angle adjustment device 6 includes a servomotor 61, by means of which a drive shaft 63 having an eccentric disk 64 can be rotated via a gear mechanism 62, in particular via a worm gear. The drive shaft 63 is arranged in a housing 67, which is attached to the machine body 90 via a mounting plate 68. An eccentric arm 65 is connected by one eccentric arm end 651 to the eccentric disk 64 and by the other eccentric arm end 652 to an adjusting collar 66, which is connected to an end region of the hollow cylindrical body 51 of the cutting carriage bearing 5 and is arranged around the cutting carriage bearing 5. The drive shaft 63, the eccentric disk 64, and the eccentric arm 65 together form an eccentric. Rotation of the shaft 63 with the eccentric disk 64 displaces the eccentric arm 65, which is connected to the eccentric disk 64 at its end 651. This results in a translational displacement of the adjusting collar 66, which is connected to the cutting carriage bearing 5. This causes the end region of the hollow cylindrical body 51 of the cutting carriage bearing 5, which is connected to the pivot angle adjustment device 6, to rise or fall. This causes the hollow cylindrical body 51 to rotate about the pivot axis A or adjusts the pivot angle α of the cutting carriage bearing 5 or of the hollow cylindrical body 51 of the cutting carriage bearing 5, which is shown in Figures 10 and 12.

[0032] Referring to FIG. 10, the rotation angle α can be defined as the angle between the longitudinal direction g of the hollow cylindrical body 51 of the cutting carriage bearing 5 when it is rotating about the rotation axis A and the longitudinal direction a of the hollow cylindrical body 51 of the cutting carriage bearing 5 when it is not rotating relative to the stationary part of the cutting carriage bearing 5. The longitudinal direction g shown in FIG. 10 is the central axis of the hollow cylindrical body 51 of the cutting carriage bearing 5. The non-rotating state of the hollow cylindrical body 51 of the cutting carriage bearing 5 is shown in FIG. 2. The longitudinal direction a shown in FIG. 2 coincides with the central axis of the hollow cylindrical body 51 of the cutting carriage bearing 5.

[0033] The pivot angle α is adjustable in the range of −20° to 20°. The machine is preferably dimensioned such that an adjustment range of −10° to 10°, more preferably −5° to 5°, is sufficient.

[0034] As best seen in Figures 1, 3 and 4, the cutting carriage 2 mounted on the cutting carriage bearing 5 includes a cylindrical body 21 with a lug 22 extending upwardly from the body 21. The lug 22 engages with a slot 52 in the hollow cylindrical body 51 of the cutting carriage bearing 5 and together with the slot 52 forms an anti-rotation device.

[0035] The cutting head 3 is attached to the cutting carriage 2 on the side facing the first forming station 91, and has a cutting blade 30. The cutting head has a cutting blade 30 that is open on the side facing the first forming station 91 and abuts against the rod portion W. The cutting blade 31 is attached to a rotating lever 32, and presses the rod portion W against the cutting blade 30 from the side opposite the cutting blade 30. In this way, the rod portion W cut from the rod material is held by the cutting blade 30, and the held rod portion is transported to the first forming station 91. The cutting of the rod portion W from the rod material and the transport or supply of the cut rod portion to the first forming station 91 are performed by moving the cutting carriage 2, together with the cutting head 3 and cutting blade 30, forward in the direction toward the first forming station 91. The rotating lever 32 with the attached cutting blade 31 operates as follows: when the rod W to be cut is placed in front of the cutting blade 30 by the advancement of the rod material, the rotating lever 32 presses the rod W against the cutting blade 30 and holds the cutting blade 30 against the rod until the cut rod is sent to the first forming station 91 and taken up by the holding device of the first forming station 91. What has been said in this paragraph and the details of how to implement it are known to those skilled in the art and are comprehensively described in DE 2940375 C2, the disclosure of which is therefore expressly incorporated herein by reference. Those skilled in the art do not need any further explanation in this regard.

[0036] The cutting device 1 includes a variable-stroke cutting carriage drive unit 4 for moving the cutting carriage 2 back and forth. The cutting carriage drive unit 4 includes a hydraulic cylinder 41 and a piston 42 displaceable within the hydraulic cylinder 41. The piston 42 is connected to the cutting carriage 2 via a piston rod 43. As shown in FIG. 1 , the hydraulic cylinder 41 communicates with a fluid reservoir 46 via a hydraulic line 44 and a hydraulic line 45. The hydraulic line 44 has an opening behind the piston 42, and the hydraulic line 45 has an opening in front of the piston 42. By supplying hydraulic fluid from the fluid reservoir 46 via the hydraulic line 44 behind the piston 42 and discharging hydraulic fluid via the hydraulic line 45, the cutting carriage 2 moves forward toward the first forming station 91. Meanwhile, the cutting carriage 2 moves backward from the first forming station 91 by supplying hydraulic fluid from a fluid reservoir 46 via a hydraulic line 45 in front of the piston 42 and discharging hydraulic fluid via a hydraulic line 44. The stroke of the cutting carriage 2 can be adjusted by controlling the amount of hydraulic fluid supplied.

[0037] To control both the cutting carriage drive 4 and the pivot angle adjustment device 6, the forming machine 100 has a control unit 7, which is shown diagrammatically in FIG. 1. The control unit 7 allows for simple activation of both the cutting carriage drive 4 and the pivot angle adjustment device 6, for example via an input unit 70. The input unit 70 allows for the desired stroke of the cutting carriage 2 and the desired advance direction of the cutting carriage 2 or the desired pivot angle α of the cutting carriage bearing 5 to be input, or alternatively the desired position of the bar W in the first forming station 91 to be input directly. If necessary, extensive automation can be implemented by the control unit 7.

[0038] As mentioned above, the cutting carriage 2 is mounted on the cutting carriage bearing 5 and can move back and forth in the longitudinal direction. In this case, the cutting carriage 2 is guided by slide bushings 50 arranged in a sub-area of the cutting carriage bearing 5, which, as shown in particular in FIG. 1, is provided between the cutting carriage 2 and the hollow cylindrical body 51 of the cutting carriage bearing 5. As a result, the longitudinal direction in which the cutting carriage 2 moves back and forth coincides with the longitudinal direction g of the hollow cylindrical body 51 of the cutting carriage bearing 5. The cutting carriage 2 has the same axis of rotation A and the same angle of rotation α as the hollow cylindrical body 51 of the cutting carriage bearing 5.

[0039] The pivot axis A is preferably parallel to the longitudinal direction of the cut rod W, and the cutting carriage 2 is preferably movable back and forth transversely to the longitudinal direction of the rod W.

[0040] FIG. 2 shows the hollow cylindrical body 51 of the cutting carriage bearing 5 in a non-rotating state. The rotation angle α is 0. The longitudinal direction a in the figure coincides with the central axis of the hollow cylindrical body 51 of the cutting carriage bearing 5 and the longitudinal direction and central axis of the cutting carriage 2. The eccentric disk 64, eccentric arm 65, and adjustment collar 66 are centrally located, as can be seen in detail in FIG. 2B. In detail in FIG. 2A, the piston 42 is located approximately at the left end of the hydraulic cylinder 41, i.e., approximately at the position where the piston 42 has moved most rearward. In detail in FIG. 2C, the cutting blade 30 is in contact with the uncut bar W, which is held on the opposite side by the section holder 31.

[0041] As a result of the longitudinal movement of the piston 42 in the hydraulic cylinder 41, the cutting carriage 2 advances in the longitudinal direction a, cutting a bar W from the bar stock and transporting or feeding it to the first forming station 91. When the state shown in Figures 7 and 8 is reached, in detail 8C the bar W is located in the center of the first forming station 91. In detail 8A, the piston 42 is located near the right end of the hydraulic cylinder 41, but can move further to the right. Details 8A and 8C show the intermediate stroke of the cutting carriage 2. The eccentric disk 64, eccentric arm 65 and adjusting collar 66 remain in their central position without being displaced, as can also be seen in detail 8B.

[0042] 9 and 10 show a different situation, with the rod W in detail 10 in a position displaced upwards and to the right in the first forming station 91. On the other hand, this is achieved by an increased stroke, which is shown in detail 10A by the piston 42, which has moved further to the right compared to detail 8A. Here, the piston 42 also covers part of the opening of the hydraulic line 45 to the hydraulic cylinder 41. Here, the increased stroke by a distance h1 is approximately 1.5 mm.

[0043] The upward displacement of the rod W in the first forming station 91 is achieved by rotating the drive shaft 63 counterclockwise by an angle γ in detail view 10B. The eccentric disk 64 rotates through the angle γ, pulling the eccentric arm 65 and the adjusting collar 66 downward, causing the hollow cylindrical body 51 of the cutting carriage bearing 5 to pivot downward by a pivot angle α relative to the pivot axis A. As a result, the cutting carriage 2 pivots downward by the pivot angle α on the left side of the pivot axis A, and similarly pivots upward by the pivot angle α on the right side of the pivot axis A.

[0044] 11 and 12 show a different situation, with the rod W in detail 12C in a position displaced downwards and to the left at the first forming station 91. On the other hand, this is achieved by a stroke reduction, which is shown in detail 12A by the piston 42 having moved further to the left compared to detail 8A. The piston 42 is now further away from the opening of the hydraulic line 45 to the hydraulic cylinder 41. Here, the stroke has been reduced by a distance h2, which is approximately 1.5 mm.

[0045] In detail FIG. 12B, downward displacement of the rod W in the first forming station 91 is achieved by rotating the drive shaft 63 clockwise through an angle γ. This rotates the eccentric disk 64, pushing the eccentric arm 65 and the adjusting collar 66 upward, causing the hollow cylindrical body 51 of the cutting carriage bearing 5 to pivot upward through a pivot angle α relative to the pivot axis A. As a result, the cutting carriage 2 pivots upward through the pivot angle α on the left side of the pivot axis A, and similarly pivots downward through the pivot angle α on the right side of the pivot axis A.

Claims

1. A molding machine (100) comprising a molding station (91) and a cutting device (1), the cutting device (1) for cutting a rod portion (W) from a bar material and supplying the cut rod portion (W) to the molding station (91), the cutting device (1) including a cutting carriage (2) movable back and forth and a cutting blade (30) attached to the cutting carriage (2), the rod portion (W) being cut from the bar material by the cutting blade (30) while the cutting carriage (2) is moving forward and being supplied to the molding station (91), the cutting device (1) including means for adjusting the stroke and direction of the forward movement of the cutting carriage (2).

2. The molding machine (100) of claim 1, wherein the means for adjusting the stroke and direction of the forward movement of the cutting carriage (2) is configured to be adjustable during operation of the molding machine (100), and preferably includes a control unit (7) for controlling the means for adjusting the stroke and direction of the forward movement of the cutting carriage (2).

3. 3. The molding machine (100) according to claim 1 or 2, wherein the cutting device (1) includes a variable stroke cutting carriage drive (4), and the variable stroke cutting carriage drive (4) enables the cutting carriage (2) to move back and forth.

4. 4. The molding machine (100) according to claim 3, wherein the cutting carriage drive (4) includes a hydraulic cylinder (41) and a piston (42) displaceable within the hydraulic cylinder (41), the piston (42) being connected to the cutting carriage (2) via a piston rod (43).

5. The molding machine (100) according to any one of claims 1 to 4, wherein the cutting carriage (2) is rotatable about a pivot axis (A) so as to adjust the direction of forward movement of the cutting carriage (2).

6. 6. The molding machine (100) of claim 5, wherein the cutting carriage (2) is movable back and forth transversely to the longitudinal direction of the rod portion (W), and the rotation axis (A) extends parallel to the longitudinal direction of the rod portion (W).

7. 7. The molding machine (100) according to claim 5 or 6, wherein the cutting carriage (2) is guided in a cutting carriage bearing (5), the cutting carriage bearing (5) being at least partially rotatable about the pivot axis (A).

8. 8. The molding machine (100) according to claim 7, wherein the means for adjusting the stroke and direction of the forward movement of the cutting carriage (2) comprises a rotation angle adjusting device (6), which acts in a distributed manner on the cutting carriage bearing (5), and during the adjustment, the rotation angle adjusting device (6) adjusts the rotation angle (α) of the cutting carriage bearing (5), and the rotation angle adjusting device (6) preferably comprises an eccentric.

9. 9. The molding machine (100) according to claim 7 or 8, wherein the cutting carriage bearing (5) is connected to at least one stationary mounting (58, 59) by means of at least one elastically deformable connection (56, 57).

10. A method for cutting a rod portion (W) from a rod stock and supplying the cut rod portion (W) to a forming station (91) of a forming machine (100), the method comprising: a cutting device (1) including a cutting carriage (2) movable back and forth and a cutting blade (30) attached to the cutting carriage (2), the method adjusting the stroke and direction of the forward movement of the cutting carriage (2) so that, while the cutting carriage (2) is moving forward, the cutting blade (30) cuts the rod portion (W) from the rod stock and supplies the rod portion (W) to the forming station (91), and the rod portion (W) is positioned at the forming station (91).

Images