Motorcycle fuel tank multi-station stamping composite forming die

Abstract

The invention provides a motorcycle fuel tank multi-station stamping composite forming die, and relates to the technical field of motorcycle accessory manufacturing, the motorcycle fuel tank multi-station stamping composite forming die comprises a die base, two lower die supports are fixedly connected to the middle of the upper portion of the die base, and a stamping upper die is installed above the die base through a hydraulic cylinder and a supporting beam; two die cushion tables are fixedly connected to the upper portion of the die base and located in front of and behind the lower die support correspondingly, through the automatic workpiece transferring function, traditional manual workpiece transferring operation is replaced, the safety in the production process is improved, the production efficiency and stamping continuity are improved, and the production efficiency is improved. Compared with an existing mechanical gripper, the mechanical gripper is convenient to operate and control, stable in running process and not prone to damage, can enter or move out of a die through stretching and retracting, reduces occupied space, and solves the problems that after single-time punching, semi-finished workpieces need to be manually transferred into a fine forming die from the interior of a semi-forming die, and industrial injuries are easily caused by manual operation; and the operation efficiency is low.

Description

Technical Field

[0001] The invention relates to the technical field of motorcycle parts manufacturing, in particular to a multi-station stamping composite forming die for a motorcycle oil tank. Background Art

[0002] Stamping is a key step in the manufacturing process of motorcycle fuel tanks, and the key process is stretch forming, which specifically refers to the process of drawing a flat blank into a hollow part such as a fuel tank shell. The blank is pressed into a die through a punch to cause the material to plastically flow and form a three-dimensional curved surface structure. It is an indispensable process in the manufacture of motorcycle fuel tanks. For fuel tanks with complex structures, such as those with multiple edges and sharp corners, the material flow is uneven during stamping at the edges and corners, which is prone to drawing, thinning, and even cracking. Therefore, two stamping processes are required for processing. The first is semi-forming stamping, using an arc transition die to pre-form the edges and corners to avoid stress concentration. The second is fine-forming stamping, using an edge-matching die for precise shaping to improve the uniformity of wall thickness.

[0003] For composite molds that are processed by traditional step-by-step stamping, after a single stamping, the semi-finished workpiece needs to be manually transferred from the inside of the semi-forming mold to the inside of the fine-forming mold. Manual operation is prone to cause work injuries, and the operation efficiency is low, the placement accuracy is low, and it is not easy to perform efficient continuous stamping processing. If a mechanical gripper is used, the mechanical gripper will take up a large space and is not conducive to the gripping of special-shaped workpieces. The cost and control difficulty are high. Summary of the Invention

[0004] The present invention provides a multi-station stamping composite forming die for a motorcycle fuel tank to solve the problem that for a composite die for traditional step-by-step stamping and forming processing, after a single stamping, a semi-finished workpiece needs to be manually transferred from the inside of a semi-forming die to the inside of a fine-forming die. Manual operation is prone to cause work injuries, and has low operating efficiency and low placement accuracy, making it difficult to perform efficient continuous stamping processing. If a mechanical gripper is used, the mechanical gripper will take up a large space and is not conducive to grasping workpieces with special-shaped structures, resulting in high cost and difficulty in operation.

[0005] The present invention provides a multi-station stamping composite forming die for a motorcycle fuel tank, specifically comprising: a die base, two lower die supports are fixedly connected to the middle of the upper portion of the die base, a stamping upper die is installed above the die base through a hydraulic cylinder and a support beam, two die pads are fixedly connected to the upper portion of the die base, the two die pads are respectively located in front of and behind the lower die support, a composite transposition push cylinder is fixedly connected to the upper portion of the die pad, a push rod of the composite transposition push cylinder is fixedly connected to a transposition platform, the transposition platform is movably connected to the upper surface of the die pad, a lifting linkage push cylinder is installed above the transposition platform, and the push rod of the lifting linkage push cylinder is fixedly connected to the upper portion of the die pad. The rod is fixedly connected to a linkage push frame, and two push frame sliding sleeves are fixedly connected to the linkage push frame. A moving platform guide rod is fixedly connected to the top of the exchange displacement platform, and the moving platform guide rod is slidably connected to the push frame sliding sleeve. The linkage push frame is movably connected to a unit push plate, and the side of the unit push plate facing the lower mold support is connected to the oil tank push frame through an elastic support rod. A lifting wedge seat is fixedly connected to the top of the mold pad, and the cross-section of the lifting wedge seat is a triangular structure. The lower part of the unit push plate is rotatably connected to a lifting roller, and the lifting roller is rollingly connected to the inclined surface of the lifting wedge seat. The lower mold support is movably connected to a movable inner mold, and the lower part of the movable inner mold is connected to a lower mold push rod connected to the electric push cylinder.

[0006] Furthermore, the upper surface of the mold base is fixedly connected to a loading platform, which is located on the left side of the lower mold support. The upper surface of the mold base is fixedly connected to a unloading platform, which is located on the right side of the lower mold support. The loading platform and the unloading platform are flush with the upper surface of the lower mold support.

[0007] Furthermore, a platform guide rod is fixedly connected to the top of the mold platform, and the platform guide rod is parallel to the front surface of the mold platform. A platform slide groove is provided below the exchange platform, and the platform slide groove is slidably connected to the platform guide rod.

[0008] Furthermore, a platform guide rod is fixedly connected to the top of the translation platform, a push frame sliding sleeve is installed at the bottom of the linkage push frame, the push frame sliding sleeve is slidably connected to the platform guide rod, and the platform guide rod is perpendicular to the front surface of the translation platform.

[0009] Furthermore, the side of the linkage push frame facing the lower mold support is fixedly connected to a push frame guide rod, and the side of the unit push plate away from the lower mold support is fixedly connected to a push plate sliding sleeve, the push plate sliding sleeve is slidably connected to the push frame guide rod, and the push frame guide rod is perpendicular to the upper surface of the mold pad.

[0010] Furthermore, the elastic support rod is made by combining a telescopic tube and a telescopic rod, and the telescopic rod is slidably connected to the inside of the telescopic tube.

[0011] Furthermore, the elastic support rod is fixedly connected to the side of the unit push plate facing the lower mold support by the inner end of the telescopic cylinder, the end of the telescopic rod is fixedly connected to the oil tank push frame, and the telescopic rod is perpendicular to the unit push plate.

[0012] Furthermore, a stretch spring is connected to the outer surface of the telescopic rod, and two ends of the stretch spring are fixedly connected to the telescopic tube and the telescopic rod respectively.

[0013] Furthermore, a push frame clamping plate is welded to each of the two ends of the fuel tank push frame, and a clamping plate clamping groove with a "V"-shaped structure is opened in the middle of the push frame clamping plate.

[0014] The present invention provides a multi-station stamping composite forming die for a motorcycle fuel tank, which has the following beneficial effects: The stamping composite die for the motorcycle fuel tank in the present invention is formed by splicing and combining multiple sets of dies. The multiple sets of dies are used to perform stamping processing on the same fuel tank respectively. Through the first stamping, the arc transition die is used to pre-form the edges and corners to avoid stress concentration. Then the second stamping is performed, and the edge matching die is used for precise shaping to make the product wall thickness more uniform. It is also provided with a workpiece transfer function that matches the multi-station stamping composite die. After a single stamping, the lifting linkage push cylinder is controlled to push the linkage push frame, the unit push plate and the fuel tank push frame in the direction of the lower die support, so that the push frame clamps in front and behind the workpiece cooperate to clamp the stamped workpiece, and the workpiece is simultaneously moved up for demolding during the clamping process, thereby realizing automatic demolding of the workpiece. The composite molding die of the present application can complete demolding without manual operation.

[0015] In addition, the present application has the function of automatic demolding of the workpiece, and cooperates with the function of the compound transposition push cylinder. After the workpiece is lifted, the contraction of the compound transposition push cylinder will synchronously move the transposition platform, the lifting linkage push cylinder, the linkage push frame, the unit push plate and the oil tank push frame to the right, and the workpiece is transferred from the top of the semi-formed mold to the top of the fine-forming mold, thereby realizing the transfer of the workpiece between the two molds. Cooperating with the lifting and lowering functions of the mold, the function of transferring the workpiece from the inside of the semi-formed mold to the inside of the fine-forming mold can be realized. The loading table and the unloading table can be used to place panels and finished products respectively, which is convenient for loading and unloading of products. The function of automatic workpiece transfer replaces the traditional manual operation of transferring workpieces, thereby improving the safety of the production process, and improving production efficiency and stamping continuity. Compared with the existing mechanical gripper, the operation and control are convenient, the operation process is stable and not easy to damage, and it can enter or move out of the mold by telescoping to reduce space occupancy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments are briefly introduced below.

[0017] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0018] In the attached figure: Figure 1A schematic diagram showing the overall structure of the present application; Figure 2 Shows this application Figure 1 A schematic diagram of the structure at the bottom of FIG. Figure 3 It shows the structural schematic diagram of the displacement stage of the present application; Figure 4 Shows a schematic diagram of the structure inside the lower mold support of this application; Figure 5 It shows the structural schematic diagram of the workpiece during demoulding of the present application; Figure 6 It shows the structural schematic diagram of the workpiece of the present application when it is transferred horizontally; Figure 7 Shows this application Figure 5 Schematic diagram of the left view structure; Figure 8 Shows this application Figure 6 Schematic diagram of the left view structure; Figure 9 It shows a schematic structural diagram of the linkage push frame of the present application; Figure 10 Shows a schematic structural diagram of the push plate of the unit of the present application; Figure 11 Shows a schematic structural diagram of the fuel tank push rack of the present application; Figure 12 Shows the application Figure 7 A schematic diagram of the partially enlarged structure at point A in the middle; Figure 13 Shows the application Figure 8 Schematic diagram of the locally enlarged structure at point B in the middle.

[0019] Reference numerals: 1. Mold base; 101. Loading platform; 102. Unloading platform; 103. Mold pad; 104. Pad guide rod; 105. Lifting wedge seat; 2. Lower mold support; 201. Movable inner mold; 202. Lower mold ejector; 3. Compound displacement push cylinder; 4. Shifting platform; 401. Shifting platform slide; 402. Shifting platform guide rod; 5. Lifting linkage push cylinder; 6. Linkage push rack; 601. Push rack slide; 602. Push rack guide rod; 7. Unit push plate; 701. Push plate slide; 702. Lifting roller; 703. Telescopic cylinder; 704. Telescopic rod; 705. Extension spring; 8. Fuel tank push rack; 801. Push rack splint; 802. Splint clamping groove; 9. Stamping upper mold. DETAILED DESCRIPTION

[0020] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figures 1 to 13 : The present invention proposes a multi-station stamping composite forming die for a motorcycle fuel tank, comprising: a die base 1, two lower die supports 2 are fixedly connected to the middle of the upper portion of the die base 1, a stamping upper die 9 is installed above the die base 1 through a hydraulic cylinder and a support beam, two die pads 103 are fixedly connected to the upper portion of the die base 1, the two die pads 103 are respectively located in front of and behind the lower die support 2, a composite transposition push cylinder 3 is fixedly connected to the upper portion of the die pad 103, a push rod of the composite transposition push cylinder 3 is fixedly connected to a displacement platform 4, the displacement platform 4 is movably connected to the upper surface of the die pad 103, a lifting linkage push cylinder 5 is installed above the displacement platform 4, and the lifting linkage push cylinder 5 is fixedly connected to the upper portion of the die pad 103. The push rod of the cylinder 5 is fixedly connected to the linkage push frame 6, and two push frame sliding sleeves 601 are fixedly connected to the linkage push frame 6. The upper part of the displacement platform 4 is fixedly connected to the moving platform guide rod 402, and the moving platform guide rod 402 is slidably connected to the push frame sliding sleeve 601. The linkage push frame 6 is movably connected to the unit push plate 7. The side of the unit push plate 7 facing the lower mold support 2 is connected to the oil tank push frame 8 through an elastic support rod. A lifting wedge seat 105 is fixedly connected to the upper part of the mold pad 103. The cross section of the lifting wedge seat 105 is a triangular structure. The lower part of the unit push plate 7 is rotatably connected to the lifting roller 702. The lifting roller 702 is rollingly connected to the inclined surface of the lifting wedge seat 105. The lower mold support 2 is movably connected to the movable push plate 7. The movable inner mold 201 is connected to the lower mold push rod 202 connected to the electric push cylinder below the movable inner mold 201. The elastic support rod is composed of a telescopic cylinder 703 and a telescopic rod 704. The telescopic rod 704 is slidably connected to the inside of the telescopic cylinder 703. The elastic support rod is fixedly connected to the side of the unit push plate 7 facing the lower mold support 2 by the inner end of the telescopic cylinder 703. The end of the telescopic rod 704 is fixedly connected to the oil tank push frame 8. The telescopic rod 704 is perpendicular to the unit push plate 7. The outer sleeve of the telescopic rod 704 is connected with an extension spring 705. The two ends of the extension spring 705 are fixedly connected to the telescopic cylinder 703 and the telescopic rod 704 respectively. Under normal circumstances, during the normal stamping process of the workpiece, the lifting linkage push cylinder 5 is in a retracted state, and the linkage push frame 6, the unit push plate 7 and the oil tank push frame 8 are away from the lower die support 2. When the stamping is completed, the linkage push cylinder 5 is controlled to move up, and the linkage push frame 6 is pushed in the direction close to the lower die support 2, so that the push frame clamping plate 801 contacts the edge of the workpiece, and as the push rod of the linkage push cylinder 5 is lifted, it continues to extend. Under the action of pressure, the telescopic rod 704 slides into the inside of the telescopic cylinder 703, stretching the extension spring 705 to store force, urging the unit push plate 7 to continue to move, and the lifting roller 702 rolls to the inclined surface of the mold pad 103 and rolls along the inclined surface, and the unit push plate 7 and the oil tank push frame 8 move up, thereby controlling the lifting of the workpiece and realizing the demoulding of the workpiece;After the workpiece is demolded, the composite transposition push cylinder 3 is controlled to retract, causing the transposition stage 4, lifting linkage push cylinder 5, linkage push frame 6, unit push plate 7, and oil tank push frame 8 to move horizontally to the right, transferring the workpiece from above the semi-forming mold to above the finishing mold. The lifting linkage push cylinder 5 is then controlled to retract, pulling the linkage push frame 6 and unit push plate 7 backward. When the lifting roller 702 disengages from the lifting wedge seat 105, it slides downward under its own gravity, and the workpiece in the oil tank push frame 8 is controlled to move downward and into the right lower mold support 2, completing the workpiece transfer from the interior of the semi-forming mold to the interior of the finishing mold.

[0022] In the embodiment of the present disclosure, the upper surface of the mold base 1 is fixedly connected to a loading platform 101, which is located on the left side of the lower mold support 2. The upper surface of the mold base 1 is fixedly connected to a unloading platform 102, which is located on the right side of the lower mold support 2. The loading platform 101 and the unloading platform 102 are flush with the upper surface of the lower mold support 2; the loading platform 101 and the unloading platform 102 can be used to place panels and finished products respectively, which is convenient for loading and unloading of products.

[0023] In the embodiment of the present disclosure, a pad guide rod 104 is fixedly connected to the top of the mold pad 103, and the pad guide rod 104 is parallel to the front surface of the mold pad 103. A shift platform slide groove 401 is provided below the shift platform 4, and the shift platform slide groove 401 is slidably connected to the pad guide rod 104 to play a guiding role, so that the shift platform 4 can move left and right in a straight line under the push of the compound shifting push cylinder 3.

[0024] In the embodiment of the present disclosure, a platform guide rod 402 is fixedly connected to the top of the shifting platform 4, and a push frame sleeve 601 is installed at the bottom of the linkage push frame 6. The push frame sleeve 601 is slidably connected to the platform guide rod 402. The platform guide rod 402 is perpendicular to the front surface of the shifting platform 4. The sliding connection between the push frame sleeve 601 and the platform guide rod 402 plays a guiding role, so that the linkage push frame 6 moves back and forth in a straight line under the push of the lifting linkage push cylinder 5, thereby improving the operating accuracy and stability of the workpiece transfer function.

[0025] In the disclosed embodiment, the side of the linkage push frame 6 facing the lower mold support 2 is fixedly connected to the push frame guide rod 602, and the side of the unit push plate 7 away from the lower mold support 2 is fixedly connected to the push plate slide 701. The push plate slide 701 is slidably connected to the push frame guide rod 602, and the push frame guide rod 602 is perpendicular to the upper surface of the mold pad 103.

[0026] Embodiment 2, on the basis of embodiment 1, a push frame clamp 801 is welded to each of the two ends of the fuel tank push frame 8, and a "V"-shaped clamp groove 802 is provided in the middle of the push frame clamp 801. After the stamping is completed, the movable inner mold 201 is pushed upward by the lower mold push rod 202, so that the workpiece inside the movable inner mold 201 moves upward, so that the edge of the workpiece is flush with the clamp groove 802. Through the setting of the clamp groove 802, when the fuel tank push frame 8 is pushed and contracted, the edge of the workpiece is inserted into the inside of the clamp groove 802, thereby improving the stability of the clamping of the workpiece.

[0027] The working principle of this embodiment is as follows: First, the motorcycle fuel tank is stamped by the cooperation of the lower die support 2 and the upper stamping die 9. The lower die support 2 located on the left and the stamping die 9 are combined to make the material flow plastically, forming a preformed structure of the motorcycle fuel tank with a three-dimensional curved surface structure. Then, the lifting linkage push cylinder 5 is controlled to move, and the linkage push frame 6 is pushed in the direction close to the lower die support 2, so that the push frame clamping plate 801 contacts the edge of the workpiece, and as the push rod of the lifting linkage push cylinder 5 continues to extend, the telescopic rod 704 slides into the inside of the telescopic cylinder 703 under the action of pressure, stretching the extension spring 705 to store force, urging the unit push plate 7 to continue to move, and the lifting roller 702 rolls to the inclined surface of the mold pad 103, and rolls upward along the inclined surface, and the unit push plate 7 and the fuel tank push frame 8 move up. This controls the lifting of the workpiece and realizes the demolding of the workpiece, and then controls the composite transposition push cylinder 3 to retract, and synchronously moves the displacement table 4, the lifting linkage push cylinder 5, the linkage push frame 6, the unit push plate 7 and the oil tank push frame 8 to the right, and transfers the workpiece from above the semi-molded mold to above the fine-molding mold, and then controls the lifting linkage push cylinder 5 to retract, and pulls the linkage push frame 6 and the unit push plate 7 backward. When the lifting roller 702 disengages from the lifting wedge seat 105, it slides downward under the action of its own gravity, and controls the workpiece in the oil tank push frame 8 to move down and place it into the lower mold support 2 on the right, so that the workpiece is transferred from the semi-molded mold of the left lower mold support 2 to the fine-molding mold of the right lower mold support 2. The automatic conversion of the workpiece between the semi-molded mold and the fine-molding mold can be completed without manual operation and robot.

[0028] In this article, there are several points to note: 1. The drawings of the embodiments of the present disclosure only relate to the structures related to the embodiments of the present disclosure. Other structures may refer to conventional designs.

[0029] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to form new embodiments.

[0030] The above are only specific embodiments of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A multi-station stamping composite forming die for a motorcycle fuel tank, comprising: A mold base (1), wherein two lower mold supports (2) are fixedly connected in the middle of the upper part of the mold base (1), and a stamping upper mold (9) is installed above the mold base (1) through a hydraulic cylinder and a support beam, and is characterized in that two mold pads (103) are fixedly connected above the mold base (1), and the two mold pads (103) are respectively located in front of and behind the lower mold support (2), and a composite displacement push cylinder (3) is fixedly connected above the mold pad (103), and the push rod of the composite displacement push cylinder (3) is fixedly connected to a displacement platform (4), and the displacement platform (4) is movably connected to the upper surface of the mold pad (103), and a lifting linkage push cylinder (5) is installed above the displacement platform (4), and the lifting linkage push cylinder (5) is fixedly connected to the upper part of the mold pad (103). The push rod is fixedly connected to a linkage push frame (6), and two push frame sliding sleeves (601) are fixedly connected to the linkage push frame (6). A shift platform guide rod (402) is fixedly connected to the top of the shift platform (4), and the shift platform guide rod (402) is slidably connected to the push frame sliding sleeve (601). The linkage push frame (6) is movably connected to a unit push plate (7), and a side of the unit push plate (7) facing the lower mold support (2) is connected to the oil tank push frame (8) through an elastic support rod. A lifting wedge seat (105) is fixedly connected to the top of the mold pad (103), and the cross section of the lifting wedge seat (105) is a triangular structure. A lifting roller (702) is rotatably connected to the bottom of the unit push plate (7), and the lifting roller (702) is rollingly connected to the inclined surface of the lifting wedge seat (105).

2. A motorcycle fuel tank multi-station stamping composite forming die according to claim 1, characterized in that: The upper surface of the mold base (1) is fixedly connected to a loading platform (101), which is located on the left side of the lower mold support (2). The upper surface of the mold base (1) is fixedly connected to a discharge platform (102), which is located on the right side of the lower mold support (2). The loading platform (101) and the discharge platform (102) are flush with the upper surface of the lower mold support (2).

3. The multi-station stamping composite forming die for a motorcycle fuel tank according to claim 1, characterized in that: A platform guide rod (104) is fixedly connected to the top of the mold platform (103), and the platform guide rod (104) is parallel to the front surface of the mold platform (103). A platform slide groove (401) is provided below the displacement platform (4), and the platform slide groove (401) is slidably connected to the platform guide rod (104).

4. The multi-station stamping composite forming die for a motorcycle fuel tank according to claim 1, characterized in that: A platform guide rod (402) is fixedly connected to the top of the translation platform (4), a push frame sliding sleeve (601) is installed at the bottom of the linkage push frame (6), and the push frame sliding sleeve (601) is slidably connected to the platform guide rod (402), and the platform guide rod (402) is perpendicular to the front surface of the translation platform (4).

5. The multi-station stamping composite forming die for a motorcycle fuel tank according to claim 1, characterized in that: The linkage push frame (6) is fixedly connected to a push frame guide rod (602) on a side facing the lower mold support (2), and the unit push plate (7) is fixedly connected to a push plate sliding sleeve (701) on a side away from the lower mold support (2). The push plate sliding sleeve (701) is slidably connected to the push frame guide rod (602), and the push frame guide rod (602) is perpendicular to the upper surface of the mold pad (103).

6. The multi-station stamping composite forming die for a motorcycle fuel tank according to claim 1, characterized in that: The elastic support rod is made by combining a telescopic cylinder (703) and a telescopic rod (704), and the telescopic rod (704) is slidably connected to the inside of the telescopic cylinder (703).

7. The multi-station stamping composite forming die for a motorcycle fuel tank according to claim 6, characterized in that: The elastic support rod is fixedly connected to the side of the unit push plate (7) facing the lower mold support (2) by the inner end of the telescopic cylinder (703), and the end of the telescopic rod (704) is fixedly connected to the oil tank push frame (8), and the telescopic rod (704) is perpendicular to the unit push plate (7).

8. The multi-station stamping composite forming die for a motorcycle fuel tank according to claim 7, characterized in that: The telescopic rod (704) is externally connected with a stretching spring (705), and both ends of the stretching spring (705) are respectively fixedly connected to the telescopic cylinder (703) and the telescopic rod (704).

9. The multi-station stamping composite forming die for a motorcycle fuel tank according to claim 1, characterized in that: A push frame clamping plate (801) is welded to each of the two ends of the oil tank push frame (8), and a clamping plate clamping groove (802) with a "V"-shaped structure is provided in the middle of the push frame clamping plate (801).

10. The multi-station stamping composite forming die for a motorcycle fuel tank according to claim 1, characterized in that: The lower die support (2) is movably connected to a movable inner die (201) inside, and a lower die push rod (202) connected to an electric push cylinder is connected below the movable inner die (201).

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