Water tower end cover manufacturing equipment and its manufacturing method

Abstract

This invention provides a water tower end cap manufacturing equipment and a water tower end cap manufacturing method. The water tower end cap manufacturing equipment includes: a machine base, an upper pressing unit, and a lower pressing unit. The upper pressing unit is disposed on the machine base and includes an upper hydraulic cylinder, an upper slide, and an upper mold. The lower pressing unit is disposed on the machine base and located directly below the upper pressing unit, and includes a lower hydraulic cylinder, a support seat, a slide, and a lower mold. The water tower end cap manufacturing method includes the following steps: (a) plate placement step, (b) limiting step, (c) preliminary forming step, (d) final forming step, and (e) demolding step. This achieves the synergistic effect of segmented forming, lateral limiting, and longitudinal pushing, eliminating the need for a high-tonnage press, thus improving energy efficiency, effectively preventing excessive stretching and structural damage of the plate, ensuring the integrity of the grain structure, thereby extending the service life and safety of the water tower end cap, and improving production efficiency.

Claims

1. A water tower end cap manufacturing equipment, comprising: a machine base; an upper pressing unit disposed on the machine base, comprising an upper hydraulic cylinder, an upper slide block, and an upper mold, the upper hydraulic cylinder being fixedly disposed on the top of the machine base, the upper slide block being connected to the lower end of the upper hydraulic cylinder, and the upper mold being fixedly connected to the lower end of the upper slide block, such that the upper slide block and the upper mold can be driven by the upper hydraulic cylinder to move back and forth in a vertical direction, the upper mold having a limiting abutment and an upper forming part, the upper forming part being recessed in the central region of the limiting abutment, the limiting abutment being in the shape of a hollow cylinder, and its bottom surface forming an annular limiting abutment flange for pressing a plate before forming. The outer region of the material allows for lateral material flow during forming, restricting longitudinal displacement. A lower pressing unit, positioned on the machine base and directly below the upper pressing unit, includes a lower hydraulic cylinder, a support seat, a lower sliding seat, and a lower mold. The support seat is annular and fixed to the machine base to support the material to be processed. The lower sliding seat is connected to the upper end of the lower hydraulic cylinder. The lower mold has a lower forming section and is housed within the hollow area of ​​the support seat, fixedly connected to the upper end of the lower sliding seat. This allows the lower sliding seat and the lower mold to be driven by the lower hydraulic cylinder to move back and forth vertically. The lower hydraulic cylinder drives the lower mold to rise sequentially to a first positioning point and a second positioning point. At the first positioning point, the lower forming part pushes the central area of ​​the sheet material upward to perform initial plastic deformation. At the second positioning point, the sheet material is pushed and combined with the stop of the upper forming part to complete the forming of an end cap with a continuous curved surface. During the forming process, the upper hydraulic cylinder continuously applies a limiting pressure to the limiting stop to control the material flow direction.

2. The water tower end cap manufacturing equipment as described in claim 1, wherein the upper pressing unit further includes an upper slide stroke control device, the upper slide is connected to an upper slide stroke sensor, the upper slide stroke control device is disposed at a position corresponding to the upper slide stroke sensor, and a first upper slide sensor switch and a second upper slide sensor switch are sequentially arranged from top to bottom.

3. The water tower end cap manufacturing equipment as described in claim 1, wherein the lower pressing unit further includes a sliding seat stroke control device, the sliding seat is connected to a sliding seat stroke sensor, the sliding seat stroke control device is disposed at a position corresponding to the sliding seat stroke sensor, and a first sliding seat sensor switch, a second sliding seat sensor switch and a third sliding seat sensor switch are sequentially arranged from bottom to top.

4. The water tower end cap manufacturing equipment as described in claim 1, wherein a circular hole cutter is provided in the central part of the upper forming part of the upper mold, and a circular hole anvil corresponding to the circular hole cutter is provided in the central part of the lower forming part of the lower mold.

5. A method for manufacturing a water tower end cap, using the water tower end cap manufacturing equipment as described in any one of claims 1 to 3, comprising the following steps: (a) a plate placement step, wherein a metal plate is placed flat on the support seat of the lower pressing unit, and its periphery is stably supported by the support seat; (b) a limiting step, wherein the upper hydraulic cylinder is driven to press down the upper mold, causing the annular limiting abutment edge of the limiting abutment to contact the outer periphery of the plate, thereby limiting the plate to only undergo lateral displacement and not longitudinal displacement during subsequent forming; (c) a preliminary forming step, wherein the lower hydraulic cylinder is driven to raise the lower mold to a first positioning point, and the lower forming part of the lower mold pushes the central area of ​​the plate upward, causing it to undergo plastic deformation and initially form an arc-shaped profile; and (d) a final forming step, wherein the lower mold is further driven to rise to a second positioning point, causing the plate to be blocked by the upper forming part of the upper mold, and finally forming a non-perforated water tower end cap with a continuous curved surface appearance; wherein... During the molding process in steps (c) and (d), the upper hydraulic cylinder continuously applies a limiting pressure to the limiting stop to control the material flow direction.

6. The method for manufacturing the end cap of the water tower as described in claim 5, wherein in step (a), the metal sheet is provided with a size for deformation.

7. The water tower end cap manufacturing method as described in claim 5, wherein in step (c), the periphery of the plate is simultaneously moved towards the center, so that the plate is formed by pushing rather than stretching.

8. The water tower end cap manufacturing method as described in claim 5, after step (d), further includes a demolding step (e), in which the upper hydraulic cylinder of the upper pressing unit drives the upper slide and the upper mold to move upward to return to their original positions, and the lower hydraulic cylinder of the lower pressing unit drives the lower slide and the lower mold to move downward to return to their original positions, so as to remove the holeless end cap.

9. A method for manufacturing a water tower end cap, using the water tower end cap manufacturing equipment as described in claim 4, comprising the following steps: (a) a plate placement step, wherein a metal plate is placed flat on the support seat of the lower pressing unit, and its periphery is stably supported by the support seat; (b) a limiting step, wherein the upper hydraulic cylinder is driven to press down the upper mold, causing the annular limiting abutment edge of the limiting abutment to contact the outer periphery of the plate, thereby limiting the plate to only be able to undergo lateral displacement during subsequent forming processes, and preventing longitudinal displacement; (c) a preliminary forming step, wherein the lower hydraulic cylinder is driven to press down the lower mold... The die rises to the first positioning point, where the lower forming part of the lower die pushes the central area of ​​the sheet metal upwards, causing plastic deformation and initially forming an arc-shaped contour; and (d) in the final forming step, the lower die continues to rise further to the second positioning point, where the sheet metal is pushed against and stopped by the upper forming part of the upper die, forming a continuous curved surface appearance on one hand, and simultaneously cutting a circular hole in the center of the sheet metal through the corresponding shearing action of the circular hole cutter and the circular hole anvil, ultimately forming a perforated water tower end cap with a continuous curved surface appearance; wherein, During the molding process in steps (c) and (d), the upper hydraulic cylinder continuously applies a limiting pressure to the limiting stop to control the material flow direction.

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