A tooling for manufacturing screen plates for a screw extrusion dewatering machine

Abstract

This invention discloses a tooling for manufacturing a screen plate for a spiral extrusion dewatering machine, including a support frame with a cylinder horizontally fixed on the support frame. A positioning plate is provided on each of the left and right sides of the cylinder, and the positioning plates are horizontally fixed on the support frame, with the plane of the positioning plate and the axis of the cylinder being on the same horizontal plane. This invention uses the cylinder and positioning plates for positioning, ensuring that the workpiece maintains good precision after welding, meeting assembly requirements. After welding, there is no need to use a large machine tool to process the inner diameter, saving costs, reducing processes, improving efficiency, and featuring a simple structure and high practicality.

Description

Technical Field

[0001] This invention relates to the field of papermaking equipment technology, and in particular to a tooling for manufacturing screen plates for a screw extrusion dewatering machine. Background Technology

[0002] The sieve plate of the screw extrusion dewatering machine is welded from a semi-circular steel plate, reinforcing ribs, and side plates. Each set of sieve plates consists of two semi-circular sieve plates. Because the gap between the inner diameter of the sieve plate and the outer diameter of the screw is very small, it is necessary to ensure that the machining accuracy of each set of sieve plates meets the requirements.

[0003] The previous manufacturing method was as follows: First, a certain machining allowance was left on the inner diameter of the arc-shaped steel plate before welding. Then, the steel plate was fixed and welded into shape using a welding platform. After welding, the two semi-circular screen plates were aligned and merged into one complete circle. After being tightened with bolts, the inner hole was machined on a lathe.

[0004] Disadvantages: During welding, the workpiece shape deforms randomly due to the heat generated, resulting in uneven machining allowance of the inner diameter of the workpiece after welding, distortion of the mounting plate surface, and misalignment of the mounting plate surfaces when assembling two screen plates into a complete circle, and inability to coincide with the center of the screen plate circle. The inner diameter of the assembled complete circle can only be machined by large machine tools, which is time-consuming and costly. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a tooling for manufacturing the screen plate of a spiral extrusion dewatering machine.

[0006] The objective of this invention is achieved in the following manner: a tooling for manufacturing a screen plate for a screw extrusion dewatering machine includes a support, on which a cylinder is horizontally fixed. A positioning plate is provided on each of the left and right sides of the cylinder. The positioning plate is horizontally fixed on the support, and the plane on which the positioning plate is located is on the same horizontal plane as the axis of the cylinder.

[0007] A scale is provided on one side of the positioning plate.

[0008] The cylinder has through holes on both its front and rear end faces.

[0009] A support plate is fixed between the positioning plate and the bracket.

[0010] Compared with existing technologies, this invention uses a cylinder and a positioning plate to position the workpiece so that it can maintain good accuracy after welding, which can meet assembly needs. After welding, there is no need to use a large machine tool to process the inner diameter, saving costs, reducing processes, improving efficiency, and the structure is simple and highly practical. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the present invention.

[0012] Figure 2 This is a schematic diagram of the semi-circular sieve plate.

[0013] Among them, 1 is the bracket; 2 is the cylinder; 3 is the positioning plate; 4 is the support plate; 5 is the through hole; 6 is the semi-circular screen plate; 7 is the arc-shaped steel plate; 8 is the side plate; and 9 is the reinforcing rib. Detailed Implementation

[0014] As shown in the attached figure, the present invention includes a support 1, on which a cylindrical tube 2 is horizontally fixed. A positioning plate 3 is provided on each of the left and right sides of the cylindrical tube 2. The positioning plate 3 is horizontally fixed on the support 1, and the plane on which the positioning plate 3 is located is on the same horizontal plane as the axis of the cylindrical tube 2. During welding, the two side plates 8 of the semi-circular screen plate are first fixed to the positioning plate 3 with screws. Then, the arc-shaped steel plate 7 is placed on top of the cylindrical tube 2 for welding. The screen plate of the spiral extrusion dewatering machine includes a semi-circular screen plate 6. The semi-circular screen plate 6 is formed by welding the arc-shaped steel plate 7, the reinforcing rib 9, and the side plates 8. During manufacturing, the two side plates are first fixed to the positioning plate 3 with screws. Then, the two ends of the arc-shaped steel plate are welded to the two side plates respectively.

[0015] The positioning plate 3 has a scale on one side. When welding the arc-shaped steel plate 7, the distance between two adjacent arc-shaped steel plates 7 can be determined according to the scale on the positioning plate 3, so that the sieve plate is welded evenly.

[0016] The cylinder 2 has through holes 5 on its front and rear end faces, which reduces the weight of the tooling without affecting its use.

[0017] A support plate 4 is fixed between the positioning plate 3 and the bracket 1, which increases the stability of the manufacturing tooling.

[0018] The outer diameter of the cylinder 2 is manufactured according to the inner diameter of the sieve plate.

[0019] The working process of this invention is as follows: First, the two side plates 8 of the semi-circular screen plate are fixed to the positioning plate 3 with screws to prevent the two side plates from moving on the positioning plate 3. The first arc-shaped steel plate 7 is placed on the cylinder 2, and then the two sides of the first arc-shaped steel plate 7 are welded to the side plate 8. According to the scale on the positioning plate 3, the distance between the first arc-shaped steel plate 7 and the second arc-shaped steel plate 7 is adjusted. The two sides of the second arc-shaped steel plate 7 are welded to the side plate 8. Then, the remaining arc-shaped steel plate 7 is welded to one side, so that the arc-shaped steel plate 7 is evenly fixed on the side plate 8. After the arc-shaped steel plate 7 is welded, the reinforcing rib 9 is inserted through the arc-shaped steel plate 7 and welded to the arc-shaped steel plate 7, so that the arc-shaped steel plate 7, the reinforcing rib 9, and the side plate 8 are welded to form a semi-circular screen plate 6. After loosening the screws on the side plate 7, the welded semi-circular screen plate 6 is removed, and the welding of another semi-circular screen plate 6 begins. Finally, the two semi-circular screen plates 6 are fixed together.

[0020] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several changes and improvements without departing from the overall concept of the present invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. A method for using a tooling for manufacturing a screen plate for a screw extrusion dewatering machine, characterized in that: Includes a bracket (1), on which a cylinder (2) is horizontally fixed. A positioning plate (3) is provided on each of the left and right sides of the cylinder (2). The positioning plate (3) is horizontally fixed on the bracket (1), and the plane on which the positioning plate (3) is located is on the same horizontal plane as the axis of the cylinder (2). A scale is provided on one side of the positioning plate (3). First, fix the two side plates (8) of the semi-circular sieve plate to the positioning plate (3) with screws to prevent the two side plates from moving on the positioning plate (3). Place the first arc-shaped steel plate (7) on the cylinder (2), and then weld the two sides of the first arc-shaped steel plate (7) to the side plate (8). According to the scale on the positioning plate (3), adjust the distance between the first arc-shaped steel plate (7) and the second arc-shaped steel plate (7). Weld the two sides of the second arc-shaped steel plate (7) to the side plate (8), and then weld the remaining arc-shaped steel plate (7) to one side. 7) The arc-shaped steel plate (7) is evenly fixed on the side plate (8). After the arc-shaped steel plate (7) is welded, the reinforcing rib (9) is inserted through the arc-shaped steel plate (7) and welded to the arc-shaped steel plate (7), so that the arc-shaped steel plate (7), the reinforcing rib (9) and the side plate (8) are welded into a semi-circular screen plate (6). Then loosen the screws on the side plate (8), remove the welded semi-circular screen plate (6), start welding another semi-circular screen plate (6), and finally fix the two semi-circular screen plates (6) together.

2. The method of using the tooling for manufacturing the screen plate of a screw extrusion dewatering machine according to claim 1, characterized in that: The cylinder (2) has through holes (5) on its front and rear end faces.

3. The method of using the tooling for manufacturing the screen plate of a screw extrusion dewatering machine according to claim 1, characterized in that: A support plate (4) is fixed between the positioning plate (3) and the bracket (1).

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