Method for forming helical blades for vertical mixers

Abstract

The present application relates to a kind of vertical agitator helical blade forming methods of processing various specifications helical blade by replacing different pitch spline shaft screw, double-end nut and forming mold core, double-end nut is fixed below workbench, spline shaft screw is screwed into double-end nut and helical cooperation, spline of the lower end of spline shaft screw is inserted into spline transmission sleeve connection, spline transmission sleeve is connected with the rotating shaft of speed reducer, forming mold core is installed at the top end of spline shaft screw, switch control panel is fixed on spline shaft, upper travel switch and lower travel switch are respectively located on the workbench above and below switch control panel, cylinder shaft end is connected with rolling wheel guide rod, card slot rolling wheel is installed on rolling wheel guide rod and card slot rolling wheel wheel groove is formed with the card joint cooperation of helical piece material. Advantage: spline shaft screw can be designed into up-down sliding structure in spline transmission sleeve, by replacing different pitch spline shaft screw, double-end nut and forming mold core, various specifications helical blade can be processed.

Description

Technical Field

[0001] This invention relates to a method for forming spiral blades for vertical mixers, which can process spiral blades of various specifications by changing splined shaft screws, double-ended nuts and forming mold cores with different pitches. It belongs to the field of manufacturing vertical mixer spiral blade forming machines. Background Technology

[0002] CN101342562A, entitled "Helical Blade Winding and Forming Method and Forming Equipment", includes the following steps: (1) Steel strip conveying: the end of the steel strip coil is fed into the guide frame of the helical blade winding and forming equipment; (2) Steel strip end positioning and clamping: one end of the steel strip is fixed on the fixed mold, and the inner side of the steel strip is pressed against the end face of the fixed mold, and its lower lateral side is perpendicular to the surface of the central mandrel of the fixed mold. The moving and fixed molds are closed to clamp the steel strip. (3) The drive shaft of the winding machine rotates, which drives the moving and fixed dies and the steel strip clamped by the moving and fixed dies to rotate. The steel strip is pulled out from the guide frame and wound around the spiral blade with its width perpendicular to the axis of the central mandrel. The spiral blade is fitted on the winding mandrel, and the spiral surfaces overlap each other. During the winding process of the spiral blade, the moving die always clamps the wound spiral blade and moves backward as the number of winding turns of the spiral blade increases. The guide frame moves backward synchronously until the set number of winding turns is reached, and then the drive shaft of the winding machine stops rotating. (4) The spiral blade with the overlapping spiral surfaces is demolded. The moving die moves backward to the position, and the guide frame moves backward with the steel strip inserted in it. First, the steel strip is separated from the fixed die, and then the spiral blade with the overlapping spiral surfaces is separated from the central mandrel of the fixed die. Finally, the steel strip is cut. (6) The spiral blade is finally drawn into shape. The spiral blade with the overlapping spiral surfaces is drawn to the required pitch on a special drawing machine. The patented technical solution involves a rotating spindle and a backward-moving guide wheel to rotate and shape the spiral workpiece. This method is only suitable for manufacturing spiral blades of equal thickness and cannot be applied to the manufacturing of spiral blades of various specifications. Summary of the Invention

[0003] Design objective: To overcome the shortcomings of the prior art, this paper designs a method for forming vertical mixer spiral blades that can process spiral blades of various specifications by changing splined shaft screws with different pitches and forming mold cores.

[0004] Design Scheme: To achieve the aforementioned design objectives, this invention, based on the prior art, involves a main shaft and forming mold core rising upwards, while guide wheels laterally compress on the right. A motor rotates clockwise or counter-clockwise, driving a reducer shaft to rotate, causing the spline drive sleeve to rotate clockwise and counter-clockwise. When the spline drive sleeve rotates counter-clockwise, the forming mold core rises; when it rotates clockwise, the forming mold core descends. This invention, however, involves the main shaft rotating while the guide wheels move backward, rotating the spiral workpiece to form the desired shape.

[0005] Technical Solution: A method for forming a spiral blade for a mixer. The forming mold core is lowered to its lower limit. The spiral blade is inserted into the flat groove of the fixing block. The rotating locking screw is rotated to press the spiral blade tightly. The air source switch is activated to push the slotted roller towards the spiral blade. The spiral blade is locked into the slotted roller groove, serving as a guide. At this point, the cylinder is under full load pressure. The blade is now tightly against the forming mold core. The motor start button is pressed, and the forming mold core rises. Simultaneously, the switch control panel rises. After reaching the upper limit switch, the power is cut off and the blade stops. The slotted roller retracts. After retraction, the motor reverses and descends. When the switch control panel reaches the lower limit switch, the motor stops rotating. The forming mold core is in its lowest initial position. The rotating locking screw is released, and the workpiece is removed, completing the entire spiral workpiece forming process.

[0006] Compared with the prior art, the spline shaft screw of the present invention can be designed as a sliding structure within the spline transmission sleeve. By replacing the spline shaft screw with different pitches and the forming mold core, various specifications of helical blades can be processed. Attached Figure Description

[0007] Figure 1 This is a structural schematic diagram of a vertical mixer spiral blade forming machine. The components in the diagram are: 1. Reducer; 2. Splined transmission sleeve; 3. Splined shaft screw; 4. Switch control panel; 5. Double-ended nut; 6. Cylinder; 7. Roller guide rod; 8. Slotted roller; 9. Rotary locking screw; 10. Fixing block; 11. Forming mold core; 12. Spiral workpiece; 13. Worktable; 14. Upper limit switch; 15. Lower limit switch; 18. Start switch.

[0008] Figure 2 This is an assembly diagram of the spline drive sleeve 2, spline shaft screw 3, switch control panel 4, double-ended nut 5, and forming mold core 11.

[0009] Figure 3 This is a schematic diagram of the front sheet 16 of the spiral-formed part.

[0010] Figure 4 This is a schematic diagram of a spiral workpiece, shown in Figure 12.

[0011] Figure 5 This is a schematic diagram of welded workpiece 17.

[0012] Figure 6 This is a schematic diagram of the molding core, with 111 being a through hole and 112 being an open slot.

[0013] Figure 7 This is a schematic diagram of the fixing block, with 101 being the flat groove.

[0014] Figure 8 This is a schematic diagram of a screw.

[0015] Figure 9This is a schematic diagram of a spline drive sleeve.

[0016] Figure 10 This is a schematic diagram of the background technology. Detailed Implementation

[0017] Example 1: Refer to Appendix Figure 1-9 A method for forming a stirrer spiral blade involves lowering the forming mold core 11 to its lower limit, inserting the spiral blade 16 into the flat groove of the fixing block 10, and rotating the locking screw 9 to press the spiral blade 16 tightly. The air supply switch is activated to push the slotted roller 8 towards the spiral blade 16, which then engages with the slotted roller 8 for guidance. At this point, the cylinder is fully loaded with pressure. Pressing the motor start button causes the forming mold core 11 to rise, and simultaneously the switch control panel 4 rises. When it reaches the upper limit switch 14, the power is cut off and the machine stops. The slotted roller 8 retracts, and the motor reverses and descends. When the switch control panel 4 descends to the lower limit switch 15, the motor stops rotating, and the forming mold core 11 is in its lowest initial position. The locking screw 9 is then released, and the workpiece is removed, completing the entire spiral workpiece forming process.

[0018] The equipment used for forming the helical blades of a mixer is a vertical mixer helical blade forming machine. In this machine, a double-ended nut 5 is fixed below the worktable 13. A splined shaft screw 3 is screwed into the double-ended nut 5 for a helical fit. The spline at the lower end of the splined shaft screw 3 passes through a splined transmission sleeve 2 for connection. The splined transmission sleeve 2 is connected to the reducer rotating shaft 1. The forming mold core 11 is installed at the top of the splined shaft screw 3. The motor rotates clockwise or counterclockwise, driving the reducer rotating shaft 1 to rotate, causing the splined transmission sleeve 2 to rotate clockwise and counterclockwise. When the splined transmission sleeve 2 rotates counterclockwise, the forming mold core 11 rises; when the splined transmission sleeve 2 rotates clockwise, the forming mold core 11 falls.

[0019] The forming core 11 has a fixing block 10 with a flat groove 101. A rotating locking screw 9 is screwed onto the fixing block 10, and the end face of the rotating locking screw 10 is used to lock the spiral sheet 16 located in the flat groove of the fixing block. The forming core 11 is designed to connect to a cylindrical head. The cylindrical head has a through hole 111 drilled in the die direction. A transverse pin is used to bolt the spline shaft 3 to the cylindrical head of the forming core 11. An opening groove 112 is designed at the upper end of the forming core 11 to install the fixing block 10. The fixing block 10 has a flat groove 101 with an angle consistent with the spiral angle of the workpiece. A threaded hole is designed above the center of the flat groove, perpendicular to the plane of the flat groove, and the locking screw 9 is installed in the threaded hole.

[0020] It should be understood that although the above embodiments provide a relatively detailed textual description of the design concept of the present invention, these textual descriptions are merely simple textual descriptions of the design concept of the present invention, and not limitations on the design concept of the present invention. Any combination, addition, or modification that does not exceed the design concept of the present invention falls within the protection scope of the present invention.

Claims

1. A method for forming the spiral blades of a vertical mixer, characterized in that: A double-ended nut is fixed below the worktable. The splined shaft screw is screwed into the double-ended nut for a helical fit. The spline at the lower end of the splined shaft screw passes through a splined drive sleeve for connection. The splined drive sleeve is connected to the reducer's rotating shaft. An opening slot is designed at the upper end of the forming mold core for mounting a fixing block. The forming mold core is installed at the top of the splined shaft screw. The motor rotates clockwise or counterclockwise, driving the reducer's rotating shaft to rotate, causing the splined drive sleeve to rotate clockwise and counterclockwise. When the splined drive sleeve rotates counterclockwise, the forming mold core rises; when the splined drive sleeve rotates clockwise, the forming mold core descends to the lower dead center. The helical sheet is inserted into the flat groove of the fixing block, and the locking screw is rotated. The rod presses the spiral sheet tightly. Activating the air supply switch pushes the slotted roller towards the spiral sheet, causing it to engage with the roller's groove and act as a guide. At this point, the cylinder is under full load, and the sheet adheres tightly to the forming mold core. Pressing the motor start button causes the forming mold core to rise, simultaneously raising the control panel. Once the upper limit switch is engaged, the power is cut off, and the roller retracts. After retraction, the motor reverses and descends. When the control panel descends to the lower limit switch engagement point, the motor stops rotating, and the forming mold core is in its lowest initial position. Loosening the locking screw allows the workpiece to be removed, completing the spiral workpiece forming process.

2. The method for forming the spiral blades of a vertical mixer according to claim 1, characterized in that: The forming mold core is provided with a fixing block and a flat groove is opened in the fixing block. The rotating locking screw is screwed onto the fixing block and the end face of the rotating locking screw is used to lock the spiral sheet material located in the flat groove of the fixing block.

3. The method for forming the spiral blades of a vertical mixer according to claim 1, characterized in that: The forming mold core structure is designed with a connecting cylindrical head. The cylindrical head has a through hole drilled in the mold direction, and a transverse pin is used to fasten the spline shaft to the connecting cylindrical head of the forming mold core.

4. The method for forming the spiral blades of a vertical mixer according to claim 1, characterized in that: The fixing block structure has a flat groove with an angle that matches the helical angle of the workpiece. A threaded hole is designed above the center of the flat groove, perpendicular to the plane of the flat groove, and a locking screw is installed in the threaded hole.

Images