Processing equipment

Abstract

To provide a processing apparatus capable of cutting scrap within a wrinkle-holding surface. [Solution] The processing apparatus according to the present disclosure is a processing apparatus for cutting scrap of plastically deformed material with a scrap cutter, comprising a lower die, a first cushion ring and a second cushion ring disposed above the lower die, a first upper die disposed above the first cushion ring, and a second upper die disposed above the second cushion ring and connected to the first upper die via a pressure source, wherein the second cushion ring, together with the first cushion ring, forms a wrinkle-holding surface during the drawing process of the material, and after the drawing process, it restricts the descent of the second upper die by attaching it to the lower die, and the scrap cutter is located within the wrinkle-holding surface and is exposed when the first cushion ring descends relative to the second cushion ring.

Description

Technical Field

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[0001] The present disclosure relates to a processing device.

Background Art

[0002] In recent years, technologies related to press working using a wrinkle presser have been disclosed. For example, Patent Document 1 discloses a technology related to punching processing of a metal plate configured by a combination of a punch die, a die, and a wrinkle presser die, and having a pressing means for the wrinkle presser die interlocked with the movement of the punch die. In the punching processing device according to Patent Document 1, as the punch die descends, the wrinkle presser die presses the metal plate against the die. At this time, by setting the pressing range of the wrinkle presser die to be larger than the outer shape of the punch die and not more than twice the plate thickness of the metal plate, an end face shape consisting only of a smooth sheared cross section can be obtained.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the punching processing method according to Patent Document 1, the end portion of the wrinkle presser die is used as the trim line in the shearing process. Therefore, in this punching processing method, it is difficult to perform cutting processing on the scrap generated by the press working within the wrinkle presser surface.

[0005] The present disclosure has been made to solve such problems, and an object thereof is to provide a processing device capable of performing cutting processing on scrap within the wrinkle presser surface.

Means for Solving the Problems

[0006] The processing apparatus according to this disclosure is a processing apparatus for cutting scrap of plastically deformed material with a scrap cutter, comprising a lower die, a first cushion ring and a second cushion ring disposed above the lower die, a first upper die disposed above the first cushion ring, and a second upper die disposed above the second cushion ring and connected to the first upper die via a pressure source, wherein the second cushion ring, together with the first cushion ring, forms a wrinkle-holding surface during the drawing process of the material, and after the drawing process, it restricts the descent of the second upper die by attaching it to the lower die, and the scrap cutter is located within the wrinkle-holding surface and is exposed when the first cushion ring descends relative to the second cushion ring. The processing apparatus does not expose the scrap cutter during the drawing process, but exposes the scrap cutter after the drawing process. As a result, the processing apparatus can cut the scrap of material within the wrinkle-holding surface while drawing the material. [Effects of the Invention]

[0007] This disclosure provides a processing apparatus capable of cutting scrap within a wrinkle-holding surface. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a cross-sectional view of the processing apparatus 1 according to this disclosure. [Figure 2] Figure 2 is a cross-sectional view of the processing apparatus 1 after plastic deformation. [Figure 3] Figure 3 is an enlarged perspective view of the boundary between the punch 5 and the cushion ring 7 and the divided cushion ring 9. [Modes for carrying out the invention]

[0009] Embodiments of the present disclosure will be described below with reference to the drawings. Figure 1 is a cross-sectional view of the processing apparatus 1 according to the present disclosure. Figure 2 is a cross-sectional view of the processing apparatus 1 after plastic deformation. Specifically, Figure 2(A) is a cross-sectional view AA of the processing apparatus 1 after plastic deformation, and Figure 2(B) is a cross-sectional view BB of the processing apparatus 1 after plastic deformation. The processing apparatus 1 performs plastic deformation on a material (workpiece) W. The material W is typically a metal plate. The metal plate is a strip-shaped thin sheet material made of metal such as steel or aluminum. The processing apparatus 1 may perform drawing or bending. The processing apparatus 1 may perform shearing along with plastic deformation on the plate material. When the processing apparatus 1 performs shearing, the processing apparatus 1 may perform precision shearing or ordinary shearing. When the processing apparatus 1 performs precision shearing, the processing apparatus 1 may perform fine blanking or opposing die shearing.

[0010] The processing apparatus 1 according to this embodiment performs deep drawing and fine blanking. Specifically, the processing apparatus 1 performs deep drawing on the material W, and then performs shearing on the material W by fine blanking. In other words, the processing apparatus 1 shown in Figure 1 is a drawing-type processing apparatus for the fine blanking method.

[0011] The processing apparatus 1 comprises an upper die 2, a lower die 3, a pad 4, a punch 5, a pad pressure source 6, a cushion ring 7, a divided upper die 8, a divided cushion ring 9, a divided upper die pressure source 10, and a scrap cutter 11.

[0012] First, Figure 1 will be used to explain the upper die 2 and lower die 3. The upper die 2 and lower die 3 are a pair of molds. Here, the upper die 2 may also be called the first upper die. The upper die 2 and lower die 3 are positioned opposite each other in the vertical direction. In Figure 1, the upper die 2 and lower die 3 are positioned opposite each other in the Z-axis direction (vertical direction). The upper die 2 presses the material W placed between the upper die 2 and the lower die 3 by pushing the upper die 2 downwards when a press machine (not shown) positioned above it pushes the upper die 2 downwards. The upper die 2 is a movable die, while the lower die 3 is a fixed die.

[0013] The upper die 2 is connected to the pad pressure source 6 and, via the pad pressure source 6, to the pad 4. The upper die 2 is also connected to the divided upper die pressure source 10 and, via the divided upper die pressure source 10, to the divided upper die 8. Furthermore, the upper die 2 comes into contact with the cushion ring 7 via the material W during the drawing process. The lower surface of the upper die 2 that comes into contact with the cushion ring 7 via the material W forms a wrinkle-retaining surface for restraining, for example, the outer end of the material W.

[0014] Here, we will explain some of the components of the processing apparatus 1 using Figure 2. The pad 4 has the function of drawing the material W by pressing on, for example, the center of the material W from above. Specifically, the pad 4 deforms the material W by pressing on it from above during the drawing process. The pad 4 is located below the upper die 2. The pad 4 moves up and down in accordance with the vertical movement of the upper die 2 by being connected to the upper die 2 via the pad pressure source 6. The pad 4 is molded into any shape, such as a U-shape, V-shape, or concave shape.

[0015] The punch 5 has the function of performing a drawing process on the material W pressed by the pad 4. The punch 5 is a fixed type located between the bottom of the material W and the lower die 3 and is connected to the lower die 3. In other words, the processing apparatus 1 according to this embodiment is an inverted configuration type. The punch 5 has a convex forming surface that protrudes upward.

[0016] The pad 4 contacts the punch 5 via the material W before the upper die 2 reaches its bottom dead center. That is, the pad 4 reaches its bottom dead center before the upper die 2 reaches its bottom dead center. The pad 4 and punch 5 may also be equipped with trimming blades (not shown) for trimming the drawn material W. The trimming blades may be provided on the outer edges of the pad 4 and punch 5. The trimming blades of the pad 4 and punch 5 may come into contact with the material W due to further downward movement by the upper die 2 after the pad 4 reaches its bottom dead center.

[0017] The pad pressure source 6 is located between the upper die 2 and the pad 4, and connects the upper die 2 and the pad 4. The pad pressure source 6 provides a reaction force to the force acting on the material W when the pad 4 performs drawing. The pad pressure source 6 is, for example, a coil spring or a gas spring. The pad pressure source 6 can absorb the vertical downward force from the upper die 2 after the pad 4 reaches its bottom dead center by the contraction of a coil or the like.

[0018] Returning to Figure 1, let's continue the explanation of each component of the processing apparatus 1. The cushion ring 7 is configured to be movable in the vertical direction by a hydraulic cylinder or the like. The cushion ring 7 is provided on the outside of the punch 5. The cushion ring 7 may also be provided so as to surround the punch 5. That is, the cushion ring 7 may be provided on part or all of the outer edge of the punch 5. Here, the cushion ring 7 may be referred to as the first cushion ring.

[0019] The cushion ring 7 is positioned below the upper die 2 and above the lower die 3. At least a portion of the cushion ring 7 contacts the upper die 2 via the material W during the drawing process. On the other hand, the cushion ring 7 may or may not be connected to the lower die 3. That is, the cushion ring 7 may have multiple legs, and these legs may support the portion of the cushion ring 7 other than the legs, thereby allowing it to be positioned above the lower die 3 without being connected to it.

[0020] Of the cushion ring 7, the upper surface that abuts on the upper die 2 via the material W forms a wrinkle suppressing surface for restraining, for example, the outer end portion of the material W. That is, the upper surface and the lower surface of the portion of the upper die 2 that abuts on the cushion ring 7 via the material W function as a wrinkle suppressing surface during the drawing process by the pad 4 and the punch 5.

[0021] Here, the positional relationship among the upper die 2, the cushion ring 7, the pad 4, and the punch 5 will be described. The height of the boundary portion between the wrinkle suppressing surface in the upper die 2 and the lower surface of the pad 4 may be the same during the drawing process. Also, the height of the boundary portion between the wrinkle suppressing surface in the cushion ring 7 and the upper surface of the punch 5 may be the same during the drawing process.

[0022] The bottom dead center of the wrinkle suppressing surface in the upper die 2 is lower than the bottom dead center of the lower surface of the pad 4. Similarly, the bottom dead center of the wrinkle suppressing surface in the cushion ring 7 is lower than the upper surface of the punch 5. That is, the wrinkle suppressing surface in the upper die 2 continues to descend even after the pad 4 reaches the bottom dead center, and similarly, the wrinkle suppressing surface in the cushion ring 7 also continues to descend. In other words, the wrinkle suppressing surfaces in the upper die 2 and the cushion ring 7 continue to descend even after the drawing process by the pad 4 and the punch 5.

[0023] After the drawing process, the wrinkle suppressing surfaces in the upper die 2 and the cushion ring 7 may descend so that the trimming blade is exposed. The trimming blade may abut on the material W before the wrinkle suppressing surfaces in the upper die 2 and the cushion ring 7 reach the bottom dead center and trim the material W along the trimming line.

[0024] Returning to the description of the configuration of the processing apparatus 1, the divided upper die 8 functions as a wrinkle-holding surface to restrain, for example, the outer end of the material W during the drawing process of the material W by the pad 4 and the punch 5. That is, the divided upper die 8 forms a wrinkle-holding surface together with a part of the upper die 2 during the drawing process of the material W. The divided upper die 8 may also be referred to as the second upper die in relation to the upper die 2. The divided upper die 8 is connected to the upper die 2 via the divided upper die pressure source 10. For example, the upper surface of the divided upper die 8 is connected to the lower surface of the upper die 2 via the divided upper die pressure source 10. Also, the lower surface of the divided upper die 8 is in contact with the upper surface of the divided cushion ring 9 via the material W.

[0025] The height of the boundary between the lower surface of the divided upper die 8 and the lower surface of the pad 4 may be the same during the drawing process. Also, the bottom dead center of the lower surface of the divided upper die 8 may be lower than the bottom dead center of the lower surface of the pad 4, or it may be at the same height as the bottom dead center of the lower surface of the pad 4. In other words, the lower surface of the divided upper die 8 may or may not continue to descend together with the wrinkle-holding surface of the upper die 2 even after the pad 4 has reached its bottom dead center. In other words, the divided upper die 8 may or may not continue to descend together with the wrinkle-holding surface of the upper die 2 even after the drawing process by the pad 4 and the punch 5.

[0026] The divided cushion ring 9 functions as a wrinkle-holding surface to restrain, for example, the outer end of the material W during the drawing process of the material W by the pad 4 and the punch 5. That is, the divided cushion ring 9 forms a wrinkle-holding surface together with the cushion ring 7 during the drawing process of the material W. The divided cushion ring 9 may also be referred to as a second cushion ring in relation to the cushion ring 7. The upper surface of the divided cushion ring 9 is in contact with the lower surface of the divided upper die 8 via the material W.

[0027] The divided cushion ring 9 is provided on the outside of the punch 5. The divided cushion ring 9 may be provided so as to surround the punch 5. That is, the divided cushion ring 9 may be provided on a part of the outer edge of the punch 5.

[0028] Here, an example of the arrangement of the cushion ring 7 and the divided cushion ring 9 will be described. Figure 3 is an enlarged perspective view of the boundary between the punch 5 and the cushion ring 7 and the divided cushion ring 9. The arrangement of the cushion ring 7 and the divided cushion ring 9 in Figure 3 corresponds to the arrangement in Figures 1 and 2. As shown in Figure 3, the cushion ring 7 and the divided cushion ring 9 may each be provided on a part of the outer edge of the punch 5.

[0029] Referring to Figures 1 and 2, the explanation of the divided cushion ring 9 will continue. The divided cushion ring 9 may form a wrinkle-retaining surface together with the cushion ring 7 by attaching it to the cushion ring 7 during the drawing process of the material W. For example, the lower surface of the divided cushion ring 9 may be attached to a part of the upper surface of the cushion ring 7 until the drawing process of the material W is completed. In this way, the divided cushion ring 9 may move up and down in accordance with the vertical movement of the cushion ring 7, thereby forming a wrinkle-retaining surface together with the cushion ring 7. In Figure 1, the divided cushion ring 9 forms a wrinkle-retaining surface together with the cushion ring 7 by attaching it to the cushion ring 7.

[0030] Furthermore, the divided cushion ring 9 may be movable vertically by a hydraulic cylinder or the like, similar to the cushion ring 7. In this case, the divided cushion ring 9 may move vertically in conjunction with the cushion ring 7 until the drawing process of the material W is completed, thereby forming a wrinkle-holding surface together with the cushion ring 7.

[0031] The height of the boundary between the upper surface of the divided cushion ring 9 and the upper surface of the punch 5 may be the same during the drawing process. Also, the bottom dead center of the upper surface of the divided cushion ring 9 may be lower than the upper surface of the punch 5, or it may be at the same height as the upper surface of the punch 5. In other words, the divided cushion ring 9 may continue to descend along with the wrinkle-holding surface of the cushion ring 7 even after the drawing process by the pad 4 and the punch 5, or it may not.

[0032] The divided cushion ring 9 is attached to the lower die 3 after the drawing process of the material W. For example, the lower surface of the divided cushion ring 9 is attached to the upper surface of the lower die 3 after the drawing process of the material W. As shown in Figure 1, the cushion ring 7 has a cylindrical cavity in the vertical direction, and a part of the lower die 3 may be formed to protrude vertically upward and penetrate the cavity. The lower surface of the divided cushion ring 9 may be attached to the upper surface of the protruding part of the lower die 3.

[0033] The downward movement of the divided cushion ring 9 is restricted by its attachment to the lower mold 3. In other words, the position where the divided cushion ring 9 is attached to the lower mold 3 becomes the bottom dead center of the divided cushion ring 9. Similarly, the downward movement of the divided upper mold 8, which is located above the divided cushion ring 9, is also restricted by the attachment of the divided cushion ring 9 to the lower mold 3. Therefore, the position where the divided cushion ring 9 is attached to the lower mold 3 becomes the bottom dead center of the divided upper mold 8.

[0034] When the trim blade trims the material W along the trim line after the drawing process, the split cushion ring 9 is attached to the lower die 3 when the height of the upper surface of the split cushion ring 9 is lower than the height of the upper surface of the punch 5. After the drawing process, the split upper die 8 and the split cushion ring 9 continue to descend together with the wrinkle-holding surfaces of the upper die 2 and the cushion ring 7, exposing the trim blade, which can then trim the material W.

[0035] Here, we will explain the relationship between the bottom dead center of the wrinkle-holding surface in the upper die 2 and cushion ring 7, and the bottom dead center of the lower surface of the divided upper die 8 and the upper surface of the divided cushion ring 9. The bottom dead center of the wrinkle-holding surface in the upper die 2 is lower than the bottom dead center of the lower surface of the divided upper die 8. Also, the bottom dead center of the wrinkle-holding surface in cushion ring 7 is lower than the bottom dead center of the upper surface of the divided cushion ring 9. This is because the downward movement of the divided upper die 8 and divided cushion ring 9 is restricted by the division cushion ring 9 being attached to the lower die 3. As shown in Figures 1 and 2, when the divided cushion ring 9 is attached to the cushion ring 7 during the drawing process, after the drawing process, the divided cushion ring 9 is attached to the lower die 3, and the cushion ring 7 continues to descend further. As a result, the cushion ring 7 separates from the divided cushion ring 9. This also creates a step at the boundary between the wrinkle-holding surface in the upper die 2 and the lower surface of the divided upper die 8 when viewed from the X-axis direction (horizontal direction). Similarly, a step is created at the boundary between the wrinkle-holding surface in cushion ring 7 and the upper surface of the divided cushion ring 9.

[0036] The split upper pressure source 10 is located between the upper mold 2 and the split upper mold 8, connecting the upper mold 2 and the split upper mold 8. The split upper pressure source 10 provides a reaction force to the force that acts on the split upper mold 8 due to the downward movement of the upper mold 2 after the split upper mold 8 reaches its bottom dead center. The split upper pressure source 10 is, for example, a coil spring or a gas spring. The split upper pressure source 10 can absorb the vertical downward force from the upper mold 2 by the contraction of a coil or the like.

[0037] Finally, the scrap cutter 11 will be described using Figure 3. The scrap cutter 11 has the function of cutting scrap of material W that has been plastically deformed, such as by deep drawing. The scrap cutter 11 is located within the wrinkle-holding surface formed by the cushion ring 7 and the divided cushion ring 9 during deep drawing. The scrap cutter 11 is positioned, for example, on the upper surface of the boundary between the cushion ring 7 and the divided cushion ring 9. The scrap cutter 11 is exposed as the upper die 2 and cushion ring 7 descend. Specifically, the scrap cutter 11 is exposed as the upper die 2 and cushion ring 7 continue to descend after the divided cushion ring 9 is attached to the lower die 3. For example, the scrap cutter 11 may be exposed through a step created at the boundary between the wrinkle-holding surface of the cushion ring 7 and the upper surface of the divided cushion ring 9 as the cushion ring 7 continues to descend. The scrap cutter 11 bites into the scrap of material W as the upper die 2 and cushion ring 7 descend, and cuts the scrap.

[0038] When the processing device 1 performs trimming using a trim blade, the scrap cutter 11 may be provided to cut the scrap material W perpendicular to the trim line of the trim blade. In Figure 3, the scrap cutter 11 is provided to cut the material W perpendicular to the trim line. The scrap cutter 11 may also be provided to cut the scrap material W in two places.

[0039] As described above, the processing apparatus 1 according to this embodiment can cut scrap material W within the wrinkle-pressing surface. Specifically, the processing apparatus 1 divides the cushion ring into a cushion ring 7 and a divided cushion ring 9, and divides the upper die into an upper die 2 and a divided upper die 8. During the drawing process, the divided cushion ring 9 functions as a wrinkle-pressing surface in the drawing process together with the cushion ring 7 by, for example, attaching it to the cushion ring 7. Similarly, the divided upper die 8 also functions as a wrinkle-pressing surface together with the upper die 2. When the drawing process is completed, the divided cushion ring 9 reaches the bottom dead center by attaching it to the lower die 3. As a result, the divided upper die 8, which is in contact with the divided cushion ring 9 via the material W, also reaches the bottom dead center. Meanwhile, as the upper die 2 and cushion ring 7 continue to descend, the scrap cutter 11 positioned within the wrinkle-pressing surface is exposed. The scrap cutter 11 can cut the scrap material W by biting into it. As a result, the processing apparatus 1 can cut scrap material W within the wrinkle-pressing surface.

[0040] In a drawing apparatus using related technology, if the scrap cutter 11 is placed within the wrinkle-holding surface, cutting begins when the wrinkle-holding surface blanks the material W, making drawing impossible. This is because the wrinkle-holding surface is the surface that blanks the material W during drawing. Therefore, in related technology, it is not possible to cut scrap within the wrinkle-holding surface. However, in the processing apparatus 1 according to this embodiment, the scrap cutter 11 is not exposed during drawing, and is exposed after drawing. As a result, the processing apparatus 1 can cut scrap within the wrinkle-holding surface while drawing the material 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 device, 2 Upper die, 3 Lower die, 4 Pad, 5 Punch, 6 Pad pressure source, 7 Cushion ring, 8 Split upper die, 9 Split cushion ring, 10 Split upper die pressure source, 11 Scrap cutter, W Material

Claims

[Claim 1] A processing apparatus for cutting plastically deformed material scrap with a scrap cutter, Lower mold and A first cushioning ring and a second cushioning ring are positioned above the lower mold, A first upper mold positioned above the first cushion ring, The system comprises a second upper mold positioned above the second cushioning ring and connected to the first upper mold via a pressure source, The second cushioning ring, together with the first cushioning ring, forms a wrinkle-preventing surface during the drawing process of the material, and after the drawing process, it is attached to the lower die to restrict the downward movement of the second upper die. The scrap cutter is located within the wrinkle-holding surface and is exposed as the first cushioning ring descends relative to the second cushioning ring. Processing equipment.

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