Auxiliary positioning mechanism for workpiece disengagement from a cylinder

Abstract

The utility model discloses an auxiliary positioning mechanism that workpiece is separated from cylinder body belongs to SLM selective laser sintering field, the utility model aims at solving in the metal printing post -processing, when taking out large -size cylinder body workpiece, because of the auxiliary equipment height and cost limit, need first cylinder body drop and turn out, again individually jacking workpiece to the workpiece position, but the cylinder body inner wall friction can cause its with jacking mechanism ascending after because dead weight back and fall, and then damage sealing washer and influence cylinder body and equipment precision, influence the problem of printing use, the utility model discloses a cylinder body, the cylinder body is the cylindrical structure of upper and lower opening, the both sides of cylinder body all movably connect with base, the inside of cylinder body is provided with workpiece platform, the below of workpiece platform is connected with piston plate, the piston plate is through the end face of sealing washer and base and is resisted, be provided with the stop pin on the base, one side of stop pin is connected with the pneumatic cylinder.

Description

Technical Field

[0001] This utility model relates to the field of SLM selective laser sintering technology, specifically to an auxiliary positioning mechanism for workpiece separation from the cylinder. Background Technology

[0002] Currently, in the post-processing section of metal printing, during the cylinder lifting process, auxiliary equipment is typically used to lift the fork arm to a certain height before lifting the workpiece. However, when retrieving large workpieces, height and cost limitations prevent the auxiliary equipment from lifting them from a higher height. Therefore, to facilitate smooth workpiece transfer from the bottom, the cylinder must be lowered and rotated to a designated position before the workpiece is lifted separately to the lifting position. However, during this process, due to friction between the inner walls of the cylinder, it is lifted to a certain height along with the lifting mechanism and then falls back due to its own weight. This can cause friction damage to the sealing rings and also impair the precision of the cylinder and the equipment, affecting printing performance. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model proposes an auxiliary positioning mechanism for workpiece detachment from a cylinder, comprising a cylinder, which is a cylindrical structure with openings at the top and bottom. Bases are movably connected to both sides of the cylinder. A workpiece platform is disposed inside the cylinder, and a piston plate is engaged below the workpiece platform. The piston plate abuts against the end face of the base via a sealing ring. A stop pin is disposed on the base, and a cylinder is connected to one side of the stop pin.

[0004] As a further improvement of this utility model, a stop pin seat is connected to the base, and the stop pin is connected to the base through the stop pin seat.

[0005] As a further improvement of this utility model, the cylinder is connected to the cylinder via a connecting rod.

[0006] The beneficial effects of this utility model are:

[0007] By using a pin stop, the cylinder that has moved out of the conveyor belt is restricted to the workpiece platform position, preventing it from following the piston's rise or fall. This reduces abnormal friction of the sealing ring, allowing subsequent actions to proceed smoothly and effectively improving the stability of the piston movement.

[0008] It can effectively ensure the stability of the piston during movement and avoid the life reduction of the seal ring due to abnormal use. Attached Figure Description

[0009] Figure 1 This is a cross-sectional view of the auxiliary positioning mechanism for detaching the workpiece from the cylinder in this embodiment.

[0010] Figure 2This is a side sectional view of the auxiliary positioning mechanism for disengaging the workpiece from the cylinder in this embodiment.

[0011] In the diagram: 1. Cylinder body, 2. Sealing ring, 3. Workpiece platform, 4. Stop pin, 5. Base, 6. Cylinder, 7. Connecting rod, 8. Stop pin seat, 9. Piston plate. Detailed Implementation

[0012] To facilitate understanding of this application, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings illustrate the described embodiments. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of this application.

[0013] In this embodiment, the stop pin 4 adopts a limiting method commonly used in industrial equipment. The stop pin 4 is often used to limit the workpiece or carrier. During use, the spacing and quantity are selected according to the actual situation to ensure the stability of the cylinder 1 during the movement of the piston plate 9.

[0014] like Figures 1-2 As shown, an auxiliary positioning mechanism for workpiece detachment from a cylinder includes a cylinder 1, which is a cylindrical structure with openings at the top and bottom. Bases 5 are movably connected to both sides of the cylinder 1. A workpiece platform 3 is provided inside the cylinder 1. A piston plate 9 is engaged below the workpiece platform 3. The piston plate 9 abuts against the end face of the base 5 through a sealing ring 2. A stop pin 4 is connected to the base 5. A cylinder 6 is connected to one side of the stop pin 4.

[0015] A stop pin seat 8 is connected to the base 5, and the stop pin 4 is connected to the base 5 through the stop pin seat 8. The cylinder 6 is connected to the cylinder 6 through the connecting rod 7.

[0016] This utility model mainly addresses the workpiece removal process after powder cleaning in 3D printing equipment, specifically the design improvement of the passive lifting of cylinder 1 during the substrate removal process.

[0017] In use, the piston plate 9 is placed inside the cylinder body 1, and the cylinder body 1 is positioned on the base 5. The side is tightly attached to the inner wall of the cylinder body 1 by the sealing ring 2. When the piston plate 9 is about to move upward, the stop pins 4 on both sides are driven by the cylinder 6 and driven by the connecting rod 7, so that the stop pins 4 extend, thereby restricting the Z-axis movement of the cylinder body 1.

[0018] Specifically, after the forklift transfers the printed workpiece along with the cylinder 1 from the host to the powder cleaning station, the lifting mechanism needs to lift the piston plate 9 and the workpiece upwards to the powder cleaning position. At this time, the piston plate 9 and the workpiece move together as a single motion unit. After a series of powder cleaning actions, all the powder in the cylinder 1 is removed. After the powder cleaning operation is completed, the piston plate 9 and the workpiece are reset and fall back to the bottom of the cylinder 1. They are then moved out along with the cylinder 1 via a conveyor belt to the workpiece removal position. To remove the workpiece from the bottom of the cylinder 1, the motion unit that integrates the piston plate 9 and the substrate workpiece needs to be pushed out of the cylinder 1 again until the workpiece is completely exposed above the top edge of the cylinder 1 so that it can be removed. However, because the sealing ring 2 of the piston plate 9 is in close contact with the inner wall of the cylinder 1, the friction between the cylinder 1 and the sealing ring 2 is greater than the weight of the cylinder itself during the process of the piston plate 9 being pushed out by the lifting mechanism. As a result, the cylinder 1 is passively raised along with the piston plate 9. This solves the problem of cylinder 1 moving during piston plate 9 ejection, ensuring smooth removal of the workpiece, and allowing the friction force on the four sides of sealing ring 2 to be evenly distributed, effectively solving the problem of cylinder 1 moving during workpiece removal and the problem of abnormal wear of sealing ring 2.

[0019] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An auxiliary positioning mechanism for workpiece disengagement from a cylinder, characterized by, Includes a cylinder body (1), which is a cylindrical structure with openings at the top and bottom. Both sides of the cylinder body (1) are movably connected to a base (5). Inside the cylinder body (1) is a workpiece platform (3). A piston plate (9) is snapped into the bottom of the workpiece platform (3). The piston plate (9) abuts against the end face of the base (5) through a sealing ring (2). A stop pin (4) is provided on the base (5). A cylinder (6) is connected to one side of the stop pin (4).

2. The workpiece assist positioning mechanism of claim 1, wherein, A stop pin seat (8) is connected to the base (5), and the stop pin (4) is connected to the base (5) through the stop pin seat (8).

3. The auxiliary positioning mechanism for workpiece disengagement from the cylinder body according to claim 1, characterized in that, The stop pin (4) is connected to the cylinder (6) via the connecting rod (7).

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