Processing apparatus and manufacturing method

Abstract

This disclosure provides a processing apparatus and manufacturing method capable of suppressing vertical vibration of a workpiece by pulling the workpiece in the width direction. [Solution] The processing apparatus according to the present disclosure is a processing apparatus 1 for press-working a magnetic strip-shaped workpiece W that is conveyed in one direction, and comprises one or more sets of guides 15 provided opposite each other on both sides in the width direction of the workpiece W, the guides 15 having grooves G that restrict vibration in the thickness direction of the end We of the workpiece W, and further comprising a magnet 16 that pulls the end We of the workpiece W into the grooves G by magnetic force.

Description

Technical Field

[0001] The present disclosure relates to a processing apparatus and a manufacturing method.

Background Art

[0002] Techniques related to a processing apparatus that presses a strip-shaped workpiece conveyed in one direction using a punch and a die have been developed. For example, Patent Document 1 discloses a press processing apparatus having a guide portion that restricts the movement of the workpiece in the width direction and a pressing portion that presses the workpiece from above in order to suppress the vibration of the workpiece that occurs during conveyance or press processing of the workpiece. The press processing apparatus can suppress the vibration of the workpiece in the width direction by the guide portion and the vibration of the workpiece in the vertical direction by the pressing portion, respectively.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Regarding the processing apparatus disclosed in Patent Document 1, the inventors have found the following problems. The pressing portion suppresses the vibration of the workpiece in the vertical direction by pressing the workpiece from above. Therefore, the pressing portion needs to have a shape that avoids contact with the punch. Thus, since it is not possible to provide a pressing portion around the punch, the vibration suppression mechanism as in Patent Document 1 has low versatility. Further, since the workpiece comes into contact with the pressing portion, there is a risk of causing conveyance failure or damage of the workpiece due to friction.

[0005] The present disclosure has been made to solve such problems, and provides a processing apparatus and a manufacturing method capable of suppressing the vibration of the workpiece in the vertical direction by pulling the workpiece in the width direction.

Means for Solving the Problems

[0006] The processing apparatus according to this disclosure is a processing apparatus for press-working a magnetic strip-shaped workpiece that is conveyed in one direction, and comprises one or more sets of guides provided opposite each other on both sides of the workpiece in the width direction, the guides having grooves that restrict vibration in the thickness direction of the end of the workpiece, and further comprising a magnet that pulls the end of the workpiece into the groove by magnetic force. By pulling the workpiece into the groove by magnetic force, the workpiece is pulled in the width direction. As the workpiece is pulled, the processing apparatus can suitably suppress vibration in the thickness direction of the workpiece.

[0007] The magnet may constitute all or part of the guide.

[0008] The retraction force used to pull the end portion into the groove by the magnetic force can be adjusted, and the retraction force when pressing the workpiece may be greater than the retraction force when transporting the workpiece. When pressing the workpiece, the processing device can press the workpiece with greater precision by increasing the retraction force, preventing the workpiece from shifting relative to the die and punch. On the other hand, when transporting the workpiece, the processing device can efficiently transport the workpiece while suppressing vibrations by reducing the retraction force to an extent that does not hinder the transport of the workpiece.

[0009] The manufacturing method according to this disclosure is a method for manufacturing a press-formed product by press-forming a magnetic strip-shaped workpiece that is conveyed in one direction, comprising the steps of: starting the conveyance of the workpiece; drawing the end of the workpiece into a groove provided in a guide that restricts vibration of the end of the workpiece in the thickness direction using magnetic force; and press-forming the workpiece. By drawing the workpiece into the groove using magnetic force, the workpiece is pulled in the width direction. As the workpiece is pulled, the processing apparatus can suitably suppress vibration of the workpiece in the thickness direction.

[0010] The process may include a step of weakening the magnetic force after performing press working on the workpiece. When transporting the workpiece, the processing device can efficiently transport the workpiece while suppressing vibrations by reducing the pulling force to an extent that does not hinder the transport of the workpiece. [Effects of the Invention]

[0011] This disclosure provides a processing apparatus and manufacturing method that can suppress vertical vibration of a workpiece by pulling the workpiece in the width direction. [Brief explanation of the drawing]

[0012] [Figure 1] Figure 1 is a cross-sectional view of the processing apparatus according to Embodiment 1. [Figure 2] Figure 2 is a top view of the processing apparatus according to Embodiment 1, with the upper die removed. [Figure 3] Figure 3 is a cross-sectional view taken along the line III-III in Figure 2. [Figure 4] Figure 4 shows the state in which the workpiece is pulled into the groove by magnetic force and the state in which the pull-in is released, according to Embodiment 1. [Figure 5] Figure 5 is a flowchart of the manufacturing method according to Embodiment 1. [Modes for carrying out the invention]

[0013] The following describes specific embodiments of this disclosure in detail with reference to the drawings. However, this disclosure is not limited to the following embodiments. Also, for clarity, the following descriptions and drawings have been simplified as appropriate.

[0014] (Embodiment 1) <Configuration of the processing equipment> First, referring to FIGS. 1 to 3, the processing apparatus 1 according to Embodiment 1 will be described. FIG. 1 is a cross-sectional view of the processing apparatus according to Embodiment 1. FIG. 2 is a top view of the processing apparatus in a state where the upper mold is removed according to Embodiment 1. FIG. 3 is a cross-sectional view taken along the cutting line III-III of FIG. 2.

[0015] As shown in FIG. 1, the processing apparatus 1 includes a lower mold 10, an upper mold 20, and a roller 30. The processing apparatus 1 press-processes a belt-shaped workpiece W having magnetism. The workpiece W is conveyed in one direction to the processing apparatus 1 by the rotational drive of the roller 30. The processing apparatus 1 can control the conveyance speed of the workpiece W by controlling the rotational speed of the roller 30.

[0016] In the following description, an xyz three-dimensional orthogonal coordinate system will be used as appropriate for the description. The x-direction, y-direction, and z-direction are directions parallel to the respective sides of the workpiece W in a horizontal state. In the present Embodiment 1, the width direction of the workpiece W is the x-direction, the conveyance direction of the workpiece W to the processing apparatus 1 is the y-direction, and the thickness direction of the workpiece is the z-direction. Also, in the following description, the z-direction is the vertical direction, and the xy plane is the horizontal plane. Of course, the z-direction may be a direction inclined from the vertical direction, and the xy plane may also be a plane inclined from the horizontal plane.

[0017] The lower mold 10 includes a base portion 11, a guide post 12, a die 13, a lifter 14, a guide 15, and a magnet 16. The base portion 11 holds the guide post 12, the die 13, the lifter 14, the guide 15, and the magnet 16.

[0018] The guide post 12 is a columnar member extending from the base portion 11 toward the upper mold 20. The guide post 12 suppresses the horizontal displacement (in the xy plane direction) of the upper mold 20 with respect to the lower mold 10. In other words, the guide post 12 regulates the movement of the upper mold 20 in the horizontal direction (xy plane direction) while allowing movement in the vertical direction (z-direction).

[0019] The die 13 is provided one or more on the base portion 11. When the die 13 provided on the lower die 10 engages with the punch 23 provided on the upper die 20, the workpiece W is press-processed. More specifically, the processing device 1 press-processes the workpiece W by pressing the tip of the punch 23, which is a male mold, against the workpiece W placed on the die 13, which is a female mold. Note that the press-processing includes, for example, punching, bending, drawing, and the like.

[0020] The lifter 14 is provided on the upper surface (+z direction side) of the base portion 11 so as to be movable in the vertical direction (z direction). When the workpiece W is pressed against the die 13 by the upper die 20, the lifter 14 sinks downward (-z direction). On the other hand, when the upper die 20 moves away from the workpiece W, for example, due to the restoring force of a spring, the lifter 14 rises upward (+z direction). When the upper die 20 moves away from the workpiece W, the lifter 14 lifts the workpiece W upward (+z direction) and holds the workpiece W in a state separated from the die 13. Therefore, when the workpiece is conveyed, since the lifter 14 rises upward (+z direction), the workpiece W is conveyed in a state separated from the die 13.

[0021] As shown in FIG. 2, the guides 15 are provided to face both sides in the width direction (x direction) of the workpiece W respectively. The guides 15 are not limited to one set, and a plurality of sets may be provided. When there are a plurality of sets of guides 15, each set of guides 15 is installed on the base portion 11 along the conveyance direction (y direction). Also, as shown in FIG. 3, the guide 15 is composed of a guide upper portion 15a and a guide lower portion 15b. And, the guide 15 has a groove portion G by the guide upper portion 15a and the guide lower portion 15b.

[0022] The groove G has a recessed shape with a depression on the inside in the width direction (x direction) of the workpiece W. The guide end faces S, which are the inner end faces of the upper guide 15a and lower guide 15b that constitute the groove G, are located inside the outer end face in the width direction (x direction) of the workpiece W when the workpiece W is in the reference position where it should be located in the width direction (x direction). The height of the groove G in the vertical direction (z direction) is greater than the thickness of the workpiece W, and is able to accept the workpiece W.

[0023] The upper guide 15a restricts the position of the workpiece W from above, near the outer end face in the width direction (x direction) of the workpiece W. The lower guide 15b restricts the position of the workpiece W from below, near the outer end face in the width direction (x direction) of the workpiece W. The bottom surface of the groove G restricts the position of the workpiece W from the outside, near the outer end face in the width direction of the workpiece W. In the groove G, each inner wall portion of the recess enclosing the workpiece W can come into contact with the workpiece W, but it is not necessary for them to be in constant contact with the workpiece W. Therefore, the bottom surface distance Gd of the pair of grooves G is greater than or equal to the workpiece width Wd. The workpiece W is transported while its position is restricted by the groove G. Note that the upper guide 15a and the lower guide 15b may be configured as a single unit.

[0024] The magnet 16 is provided on the outside in the width direction (x direction) from the guide end face S. The magnet 16 can pull the end We of the magnetic workpiece W into the groove G by magnetic force. In this embodiment 1, the magnet 16 is located on the outside in the width direction (x direction) of the guide 15, but it may also be located inside the groove G, for example. The magnet 16 may also constitute all or part of the guide 15. The functions of the guide 15 and the magnet 16 will be described in detail later.

[0025] Returning to the explanation of Figure 1, the upper die 20 comprises a punch holder 21, a stripper 22, and a punch 23. The upper die 20 moves up and down in the vertical direction (z direction) by a drive source (not shown). The punch holder 21 holds one or more punches 23.

[0026] The stripper 22 is connected to the punch holder 21 by a connecting member 24. When the stripper 22 holds down the workpiece W, the punch 23 presses the workpiece W, thereby suppressing displacement and deformation of the workpiece W. The stripper 22 also separates the workpiece W that is in close contact with the area around the punch 23.

[0027] The punch 23 is positioned opposite the die 13. As the upper die 20 descends downward (-z direction), the tip of the punch 23 is pressed against the workpiece W. As the upper die 20 descends further, the punch 23 press-works the workpiece W, for example by punching, bending, or drawing it. In this embodiment 1, the tip of the punch 23 is rounded, but the punch 23 may also have a flat tip, or a punch 23 that tapers towards the tip.

[0028] <Functions of Guide 15 and Magnet 16> Next, the functions of the guide 15 and magnet 16 will be explained in detail with reference to Figure 4. Figure 4 is a diagram showing the state in which the workpiece is pulled into the groove by magnetic force and the state in which the pull is released, according to Embodiment 1.

[0029] When the processing device 1 transports and presses the workpiece W without the guide 15 and magnet 16 installed, the workpiece W vibrates in the width direction (x direction) and thickness direction (z direction). This is due to the inertial force acting on the workpiece W, changes in the surrounding airflow, and vertical vibrations of the lifter 14. Vibration of the workpiece W during transport or press processing may cause transport failures or damage to the workpiece W.

[0030] Therefore, as shown in the upper diagram of Figure 4, by providing a guide 15 to the processing device 1, the processing device 1 can restrict the movement of the end We of the workpiece W in the width direction (x direction) of the workpiece W. Thus, the processing device 1 can suppress vibrations in the width direction (x direction) of the workpiece W. Furthermore, the groove G provided in the guide 15 allows the processing device 1 to restrict the movement of the end We of the workpiece W in the thickness direction (z direction). More specifically, by the lower surface (-z direction side) of the upper part 15a of the guide and the upper surface (+z direction side) of the end We, or by the upper surface (+z direction side) of the lower part 15b of the guide and the lower surface (-z direction side) of the end We, the processing device 1 can restrict the movement of the end We in the thickness direction (z direction) of the workpiece W. Thus, the processing device 1 can suppress vibrations in the thickness direction (z direction) of the workpiece W.

[0031] Furthermore, as shown in the lower diagram of Figure 4, the processing device 1 can pull the workpiece W in the width direction (x direction) by drawing the end portion We into the groove G using the magnetic force of the magnet 16. Therefore, by pulling the workpiece W in this way, the processing device 1 can further suppress vibrations in the thickness direction (z direction) of the workpiece W.

[0032] The positions and shapes of the die 13 and punch 23 are not limited by the positions of the guide 15 and magnet 16. Therefore, the processing apparatus 1 according to this embodiment 1 is highly versatile. Furthermore, since the workpiece W is pulled by the magnetic force of the magnet 16 to draw the end portion We into the groove portion G, the processing apparatus 1 can reduce contact between the workpiece W and other components during the transport of the workpiece W. Therefore, the processing apparatus 1 can suppress damage to the workpiece W and workpiece transport defects caused by contact between the workpiece W and other components.

[0033] Furthermore, if the workpiece W is pulled too strongly by the magnetic force, the transport of the workpiece W may be hindered, and the processing device 1 may not be able to transport the workpiece W at high speed. Therefore, the processing device 1 may adjust the pulling force when transporting the workpiece W and when pressing it. More specifically, the pulling force when pressing the workpiece W may be greater than the pulling force when transporting the workpiece W. When pressing the workpiece W, the processing device 1 can press the workpiece W with greater precision by increasing the pulling force, so that the workpiece W does not shift relative to the die 13 and punch 23. On the other hand, when transporting the workpiece W, the processing device 1 can efficiently transport the workpiece W while suppressing vibrations of the workpiece W by reducing the pulling force to an extent that does not hinder the transport of the workpiece W.

[0034] The method for controlling the magnetic force to adjust the attraction force is not particularly limited. For example, the processing device 1 may use an electromagnet as the magnet 16. By controlling the current supplied to the electromagnet, the processing device 1 can adjust the attraction force. The processing device 1 may also be provided with a mechanism to control the position of the magnet 16. By moving the magnet 16 closer to or further away from the workpiece W, the processing device 1 can adjust the attraction force.

[0035] <Manufacturing method> Next, a manufacturing method for producing press-formed products using the processing apparatus 1 according to Embodiment 1 will be described. Figure 5 is a flowchart of the manufacturing method according to Embodiment 1. Note that the order of the steps is not limited to this and may be rearranged as appropriate.

[0036] First, the processing device 1 starts transporting the workpiece W by rotating the roller 30 (step S101). By transporting the workpiece in one direction (+y direction) through the groove G, the processing device 1 can suppress vibrations in the width direction (x direction) and thickness direction (z direction) of the workpiece W. Alternatively, the processing device 1 may pull the workpiece W into the groove G using a magnetic pull force that does not hinder the transport of the workpiece W. This allows the processing device 1 to efficiently transport the workpiece W while suppressing vibrations of the workpiece W. Since the lifter 14 is floating upward (+z direction), the workpiece W is transported in a state separated from the die 13. Once the workpiece W has been transported by a predetermined feed amount, the processing device 1 stops the rotation of the roller 30 and stops transporting the workpiece W.

[0037] Next, the processing device 1 uses magnetic force to pull the end We of the workpiece W into the groove G (step S102). As the end We is pulled into the groove G, the workpiece W is stretched, and the processing device 1 can further suppress vibrations in the thickness direction (z direction) of the workpiece W. Note that if magnetic force pulling is performed during workpiece transport (step S101), the processing device 1 will pull the workpiece W with a pulling force greater than the pulling force in step S101.

[0038] Next, the processing device 1 presses the workpiece W (step S103). While maintaining the tensile state of the workpiece W in step S102, the processing device 1 lowers the upper die 20 downward (-z direction). Then, the processing device 1 presses the workpiece W with the die 13 and punch 23. When the pressing is complete, the processing device 1 raises the upper die 20 upward (+z direction). As a result, the lifter 14 floats upward (+z direction), lifting the workpiece W upward. The lifter 14 holds the workpiece W separated from the die 13.

[0039] Next, the processing device 1 weakens the magnetic force (step S104). By weakening the magnetic force after performing the press work, the processing device 1 reduces the pulling force of the end portion We into the groove G. The processing device 1 reduces the pulling force to an extent that does not hinder the transport of the workpiece W. Finally, the processing device 1 rotates the roller 30 and resumes the transport of the workpiece W (step S105).

[0040] As described above, the processing apparatus 1 according to this embodiment 1 can suppress vibration in the width direction (x direction) of the workpiece W by providing the guide 15. Furthermore, the groove G provided in the guide 15 allows the processing apparatus 1 to suppress vibration in the width direction (x direction) of the workpiece W. In addition, the magnetic force of the magnet 16 pulls the end portion We into the groove G, causing the workpiece W to be pulled in the width direction (x direction). Therefore, by pulling the workpiece W, the processing apparatus 1 can further suppress vibration in the thickness direction (z direction) of the workpiece W.

[0041] It should be noted that the present invention is not limited to the embodiments described above, and can be modified as appropriate without departing from the spirit of the invention. [Explanation of Symbols]

[0042] 1 Processing equipment 10 Lower mold 11 Base 12 Guideposts 13 Dies 14 Lifters 15 Guide 15a Guide top 15b Guide bottom 16 Magnets 20 Upper mold 21 Punch holder 22 Strippers 23 Punch 24 Connecting Members 30 Laura S Guide end face Double job Wd Work width We end Gd Distance between the bottom surfaces of a pair of grooves

Claims

1. A processing apparatus for press-forming a magnetic strip-shaped workpiece that is conveyed in one direction, The workpiece is provided with one or more sets of guides facing each other on both sides in the width direction, The guide has a groove that restricts vibration in the thickness direction at the end of the workpiece. Furthermore, the processing apparatus has a magnet that pulls the end of the workpiece into the groove by magnetic force. Processing equipment.

2. The magnet constitutes all or part of the guide. The processing apparatus according to claim 1.

3. The retraction force used to pull the end into the groove by the magnetic force can be adjusted. The pulling force when pressing the workpiece is greater than the pulling force when transporting the workpiece. The processing apparatus according to claim 1 or 2.

4. A manufacturing method for producing a press-formed product by press-forming a magnetic strip-shaped workpiece that is conveyed in one direction, The steps include: starting the transport of the workpiece, A step of using magnetic force to pull the end of the workpiece into a groove provided in a guide that restricts vibration in the thickness direction of the end of the workpiece, The process includes the step of press-forming the aforementioned workpiece. Manufacturing method.

5. The manufacturing method according to claim 4, further comprising the step of weakening the magnetic force after performing press working on the workpiece.

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