A method for processing aluminum handles for household appliances by bending pipes

Abstract

The application discloses a household appliance bent pipe aluminum handle processing method, which can realize the operations of processing symmetrical inclined processing holes at two ends of a household appliance bent pipe aluminum handle and processing symmetrical vertical wire holes at two ends of the household appliance bent pipe aluminum handle. The application can be specially used for processing of the household appliance bent pipe aluminum handle, the distance and angle between power heads are adjustable, various processing modes are realized, and the application has the advantages of high processing efficiency, high processing precision, convenient operation and the like; and the application is suitable for various processing scenes.

Description

Technical Field

[0001] This invention relates to the field of aluminum alloy profile processing technology, specifically a method for processing aluminum handles for household appliance bending. Background Technology

[0002] Aluminum profiles are a common processing substrate in industry, often requiring the machining of multiple or groups of anchor holes and threaded holes. Conventional machining equipment includes CNC machining centers, where the cutting head travels to a designated position for machining, or the cutting head is changed before machining. Maintaining proper spacing between groups of holes, both within and between groups, is crucial. This is especially important when the same hole needs to be machined multiple times, such as when threaded holes require drilling followed by tapping. In these cases, the cutting tool position must be precise each time. In special situations, the vertical angle of the machined holes may also need to be changed.

[0003] Aluminum handles are common aluminum alloy components used in home decoration and appliances. They are characterized by the fact that the main body is made by bending tubular profiles, and threaded holes need to be machined at both ends of the handle. They are then firmly fixed to furniture doors or appliance doors with bolts or screws. Therefore, the machining accuracy of the threaded holes is an important part of the production of bent aluminum handles.

[0004] Therefore, using a conventional three-axis single-head machining center to process bent aluminum handles in the above-mentioned situation is extremely inefficient; and it is impossible to complete the operation of changing the vertical angle during processing. For example, Patent 1: A dual-station fully automatic pneumatic drilling machine; 202110000087.2; Patent 2: A drilling device for processing hinges; 202121668487.2. Although some dual-station processing equipment is described in the prior art, there is no record of processing equipment specifically for bent aluminum handles. How to design a multi-functional device suitable for processing bent aluminum handles in actual production is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a method for processing aluminum handles for household appliances with bent tubes, which can achieve efficient processing of various bent aluminum handles: (1) symmetrical inclined processing holes at both ends of the aluminum handle; (2) symmetrical vertical thread holes at both ends of the aluminum handle; one machine can be used for multiple purposes and can adapt to processing different lengths and different hole spacings. It has high adaptability and meets the needs of flexible production.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] A method for processing aluminum handles for household appliances, used to process symmetrical inclined machining holes at both ends of the aluminum handle for household appliances, includes the following steps:

[0008] A. Place the aluminum handle on the fixture on the workbench of the processing equipment, with the surface to be processed facing upwards;

[0009] B. Adjust the tilt angle of the fixed power head assembly to the preset angle of the hole to be machined, and also adjust the variable power head assembly to the preset angle of the hole to be machined;

[0010] C. By calculating the lateral coordinates of the variable power head group, the position of the variable power head group is coarsely adjusted manually;

[0011] D. Fix the variable power head assembly and test-process 1-2 aluminum handles;

[0012] E. Inspect the processed aluminum handles and fine-tune the angles of the fixed power head assembly and the variable power head assembly, as well as the horizontal position of the variable power head assembly, before proceeding with batch processing;

[0013] A fixed power head assembly is installed on the frame of the processing equipment, and a variable power head assembly is also installed at the same height as the frame. The variable power head assembly is fixed on a power head moving base plate, which is slidably connected to a power head guide rail via a slider. The power head guide rail is fixed on the frame. A worktable is installed below the fixed and variable power head assemblies.

[0014] The power head is an externally sourced drilling power head with its own drive motor. After being connected to the workshop's high-pressure air supply, the internal cylinder of the power head can drive the drill chuck to feed downwards. A coolant nozzle is installed on one side of the power head cutting tool. The nozzle is connected to a coolant pump through a pipe to cool and lubricate the aluminum handle being machined into a bend.

[0015] A coordinate scale is installed on the frame above the fixed power head group and the variable power head group; at the same time, a mark is set on the top of each power head to align with the scale and accurately reflect the coordinate value of each power head on the scale.

[0016] The fixed power head assembly is mounted on the positioning plate A, and the positioning plate A is mounted on the frame via a non-powered rotating shaft; angle scales are set on the edge of the positioning plate A.

[0017] The variable power head assembly is mounted on the positioning disk B, which is mounted on the power head moving base plate via a non-powered rotating shaft. The positioning disk B is set with angle scale.

[0018] The method for calculating the lateral coordinate of the variable power head assembly adjustment in step C is as follows:

[0019] ΔL = A - 2*sinα*(C+e;

[0020] Where: ΔL is the coordinate difference between the variable power head and the fixed power head; A is the distance between the machining holes at both ends of the aluminum handle, which is required by the design drawing; angle α is the angle between the fixed power head and the variable power head and the vertical line; C is the fixed height of the fixed power head or the variable power head when the tool axis is not extended; e is the extension length of the tool axis of the fixed power head or the variable power head, which is directly read from the PLC.

[0021] After calculating ΔL, ΔL + the coordinate value of the top of the fixed power head is the horizontal coordinate value that the variable power head needs to move to. The horizontal coordinate value of the variable power head calculated by the above formula is of reference value. The processed bent aluminum handle needs to be placed on a special inspection fixture for inspection. If the hole spacing and inclination are qualified, no fine adjustment is required; if there are deviations in the hole spacing and inclination, the coordinate value of the variable power head can be finely adjusted by handwheel screw, or the angle can be adjusted by loosening the nut of the central shaft of positioning plate A.

[0022] A wire block is installed in the middle of the moving base plate of the power head. The wire hole of the wire block is threaded through the handwheel screw. The handwheel screw is fixedly installed on the frame by bearings.

[0023] The equipment can also be used to process symmetrical vertical threaded holes at both ends of aluminum handles for household appliance bends, including the following steps:

[0024] A. A smooth drill bit is installed on the left power head of the fixed power head group and the variable power head group, and a tap is installed on the right power head of the fixed power head group and the variable power head group.

[0025] B. Clamp an aluminum handle on the worktable and move it to the left side. Then, feed the left power head of the fixed power head group and the variable power head group to process the light hole.

[0026] C. Move the worktable to the right, and feed the left power head of the fixed power head group and the variable power head group to process the wire hole;

[0027] The bottom of the worktable is slidably connected to the worktable track via a slider, and one side of the worktable is connected to the worktable translation drive mechanism.

[0028] The workbench translation drive mechanism includes a horizontal hydraulic cylinder mounted on the side, a connecting plate connected to the piston rod of the hydraulic cylinder, and the connecting plate is fixedly connected to the workbench; the hydraulic cylinder is connected to a hydraulic pump at the bottom of the frame through a hydraulic pipe.

[0029] The worktable is moved horizontally by hydraulic power; several pneumatic clamps are installed on the worktable to clamp the aluminum profiles.

[0030] The machine frame is equipped with an aluminum chip collection trough at the bottom, and a collection funnel is located above the aluminum chip collection trough. The aluminum chips produced during processing fall into the collection trough through the funnel.

[0031] Advantages of the present invention

[0032] This invention can achieve efficient processing of various bent aluminum handles: (1) symmetrical inclined processing holes at both ends of the aluminum handle; (2) symmetrical vertical wire holes at both ends of the aluminum handle; it is multi-purpose and adaptable to processing different lengths and different hole spacings, with high adaptability and meeting the needs of flexible production.

[0033] This invention solves the problem that traditional three-axis machining centers cannot machine inclined holes when machining symmetrical inclined holes at both ends of aluminum handles. Compared with expensive four-axis machining centers, its cost is greatly reduced, which greatly improves production efficiency and reduces equipment investment costs.

[0034] When machining symmetrical vertical threaded holes at both ends of an aluminum handle, this invention utilizes the characteristic of symmetrical hole machining at both ends of a bent aluminum handle. Through multiple sets of power heads and a transversely movable worktable, it achieves multi-station simultaneous machining of multiple holes in aluminum profiles with symmetrical hole machining. Compared with single-head machining centers machining holes one by one, this invention greatly improves machining efficiency by significantly reducing the tool stroke and allowing dual tools to feed simultaneously. According to calculations, the machining efficiency is increased by nearly 400% compared with the previous single-head machining center machining scheme.

[0035] 4. When machining symmetrical inclined holes at both ends of aluminum handles, this invention enables more precise initial adjustment of the horizontal coordinate value of the variable power head by using the horizontal coordinate scale set on the equipment and the angle scale on the positioning plate. This reduces the time spent on equipment debugging and saves the cost of trial runs and materials. The first-pass yield rate for machining symmetrical inclined holes at both ends of aluminum handles for household appliance bends has increased from less than 20% to over 60%. Attached Figure Description

[0036] Figure 1 This is a front view structural diagram of the present invention;

[0037] Figure 2 This is a side view of the structure of the present invention;

[0038] Figure 3 A schematic diagram of the process for creating symmetrical vertical threaded holes at both ends of an aluminum handle. Figure 1 ;

[0039] Figure 4 A schematic diagram of the process for creating symmetrical vertical threaded holes at both ends of an aluminum handle. Figure 2 ;

[0040] Figure 5 A schematic diagram showing the symmetrical inclined machining holes at both ends of an aluminum handle;

[0041] Figure 6 A schematic diagram showing the calculation of the lateral coordinates for adjusting the variable power head assembly, which has symmetrical inclined machining holes at both ends of the aluminum handle.

[0042] The numbers and component names in the figure are as follows: 1-Positioning plate A; 2-Fixed power head assembly; 3-Power head guide rail; 4-Handwheel screw; 5-Power head moving base plate; 6-Positioning plate B; 7-Variable power head assembly; 8-Workbench track; 81-Workbench; 82-Workbench translation drive mechanism; 83-Hydraulic pump; 9-Coolant pump; 10-Aluminum chip collection tank. Detailed Implementation Example 1

[0043] A method for processing aluminum handles for household appliances, used to process symmetrical inclined machining holes at both ends of the aluminum handle for household appliances, includes the following steps:

[0044] A. Place the aluminum handle on the fixture on the workbench of the processing equipment, with the surface to be processed facing upwards;

[0045] B. Adjust the tilt angle of the fixed power head assembly to the preset angle of the hole to be machined, and also adjust the variable power head assembly to the preset angle of the hole to be machined;

[0046] C. By calculating the lateral coordinates of the variable power head group, the position of the variable power head group is coarsely adjusted manually;

[0047] D. Fix the variable power head assembly and test-process 1-2 aluminum handles;

[0048] E. Inspect the processed aluminum handles and fine-tune the angles of the fixed power head assembly and the variable power head assembly, as well as the horizontal position of the variable power head assembly, before proceeding with batch processing;

[0049] The processing equipment frame is provided with a fixed power head assembly 2, and a variable power head assembly 7 is also provided at the same plane height as the frame. The variable power head assembly 7 is fixed on the power head moving base plate 5. The power head moving base plate 5 is slidably connected to the power head guide rail 3 through a slider. The power head guide rail 3 is fixed on the frame. A worktable 81 is provided below the fixed power head assembly 2 and the variable power head assembly 7.

[0050] A coordinate scale is provided on the frame above the fixed power head group 2 and the variable power head group 7;

[0051] The fixed power head assembly 2 is mounted on the positioning plate A1, and the positioning plate A1 is mounted on the frame via a non-powered rotating shaft; angle scales are set on the edge of the positioning plate A1.

[0052] The variable power head assembly 7 is mounted on the positioning disk B6, which is mounted on the power head moving base plate 5 via a non-powered rotating shaft. The positioning disk B6 is set with angle scale.

[0053] The method for calculating the lateral coordinate of the variable power head assembly in step C of the aforementioned appliance bending aluminum handle processing method is as follows:

[0054] ΔL = A - 2*sinα*(C+e;

[0055] Where: ΔL is the coordinate difference between the variable power head and the fixed power head; A is the distance between the machining holes at both ends of the aluminum handle, which is required to be 850mm according to the design drawing; angle α is the angle between the fixed power head and the variable power head and the vertical line, which is 15°; C is the fixed height of the fixed power head or variable power head when the tool shaft is not extended, which is 512mm; e is the extension length of the tool shaft of the fixed power head or variable power head, which is directly read from the PLC as 22mm.

[0056] Calculated using ΔL=A-2*sinα*(C+e), ΔL=850-2*0.2588*(512+22))=574mm.

[0057] ΔL + the coordinate value of the top of the fixed power head. The coordinate value of the top of the fixed power head can be read directly on the scale as 28mm. Therefore, the horizontal coordinate value that the variable power head needs to move to is 574 + 28 = 602mm.

[0058] A wire block is installed in the middle of the moving base plate 5 of the power head. The wire hole of the wire block is threaded through the handwheel screw 4. The handwheel screw 4 is fixedly installed on the frame by bearings.

[0059] The bottom of the frame is provided with an aluminum chip collection trough 10, and above the aluminum chip collection trough 10 is a collection funnel. Example 2

[0060] The processing equipment frame is provided with a fixed power head assembly 2, and a variable power head assembly 7 is also provided at the same plane height as the frame. The variable power head assembly 7 is fixed on the power head moving base plate 5. The power head moving base plate 5 is slidably connected to the power head guide rail 3 through a slider. The power head guide rail 3 is fixed on the frame. A worktable 81 is provided below the fixed power head assembly 2 and the variable power head assembly 7.

[0061] A coordinate scale is provided on the frame above the fixed power head group 2 and the variable power head group 7;

[0062] A wire block is installed in the middle of the moving base plate 5 of the power head. The wire hole of the wire block is threaded through the handwheel screw 4. The handwheel screw 4 is fixedly installed on the frame by bearings.

[0063] A method for machining aluminum handles for household appliance bends, specifically for machining symmetrical vertical threaded holes at both ends of the aluminum handles for household appliance bends, includes the following steps:

[0064] A. A smooth drill bit is installed on the left power head of the fixed power head group and the variable power head group, and a tap is installed on the right power head of the fixed power head group and the variable power head group.

[0065] B. Clamp an aluminum handle on the worktable and move it to the left side. Then, feed the left power head of the fixed power head group and the variable power head group to process the light hole.

[0066] C. Move the worktable to the right, and feed the left power head of the fixed power head group and the variable power head group to process the wire hole;

[0067] The bottom of the worktable 81 is slidably connected to the worktable track 8 via a slider, and one side of the worktable 81 is connected to the worktable translation drive mechanism 82.

[0068] The workbench translation drive mechanism 82 includes a horizontal hydraulic cylinder mounted on the side, a connecting plate connected to the piston rod of the hydraulic cylinder, and the connecting plate is fixedly connected to the workbench 81; the hydraulic cylinder is connected to the hydraulic pump 82 at the bottom of the frame through a hydraulic pipe.

[0069] The bottom of the frame is provided with an aluminum chip collection trough 10, and above the aluminum chip collection trough 10 is a collection funnel.

Claims

1. A method for processing a bent pipe aluminum handle of a home appliance, characterized by, The method for processing the symmetrical inclined processing hole at both ends of the aluminum handle of the household appliance bending pipe comprises the following steps: A, the aluminum handle is placed on the clamp on the workbench of the processing equipment, and the surface to be processed faces upward; B, the fixed power head group is inclined to the preset angle of the processing hole, and the variable power head group is also adjusted to the preset angle of the processing hole; C, the horizontal coordinate of the variable power head group is adjusted through calculation, and the position of the variable power head group is manually coarsely adjusted; D, the variable power head group is fixed, and 1-2 aluminum handles are trial processed; E, the processed aluminum handle is detected, the angle of the fixed power head group and the variable power head group is finely adjusted, and the horizontal position of the variable power head group is adjusted, and batch processing is performed; The fixed power head group (2) is arranged on the rack, and the variable power head group (7) is arranged on the same plane height of the rack, the variable power head group (7) is fixed on the power head moving base plate (5), the power head moving base plate (5) is slidably connected with the power head guide rail (3) through a sliding block, and the power head guide rail (3) is fixed on the rack; the workbench (81) is arranged below the fixed power head group (2) and the variable power head group (7); The coordinate scale ruler is arranged above the fixed power head group (2) and the variable power head group (7) on the rack; The fixed power head group (2) is installed on the positioning disc A (1), the positioning disc A (1) is installed on the rack through a non-powered rotating shaft, and the edge of the positioning disc A (1) is provided with an angle scale; The variable power head group (7) is installed on the positioning disc B (6), the positioning disc B (6) is installed on the power head moving base plate (5) through a non-powered rotating shaft, and the positioning disc B (6) is provided with an angle scale.

2. According to the household appliance bending pipe aluminum handle processing method of claim 1, the horizontal coordinate calculation method of the variable power head group in step C is: ΔL=A-2*sinα* (C+e); wherein: ΔL is the coordinate difference between the variable power head and the fixed power head; A is the interval of the processing holes at both ends of the aluminum handle, which is obtained from the design drawing; the angle α is the included angle between the fixed power head and the variable power head and the vertical line; C is the fixed height of the fixed power head or the variable power head when the cutter shaft is not stretched out; e is the cutter shaft stretching length of the fixed power head or the variable power head, which is directly read on the PLC; After calculating ΔL, ΔL+the coordinate value of the top of the fixed power head is the horizontal coordinate value to which the variable power head moves.

3. The method of claim 1, wherein the method further comprises: The wire block is installed in the middle of the power head moving base plate (5), the wire hole of the wire block is threadedly connected with the hand wheel screw rod (4), and the hand wheel screw rod (4) is fixedly installed on the rack through a bearing. ​ 4. The method of claim 1, wherein the method further comprises: The method for processing the symmetrical vertical wire hole at both ends of the aluminum handle of the household appliance bending pipe comprises the following steps: ​ A, the left power heads of the fixed power head group and the variable power head group are installed with a light hole drill bit, and the right power heads of the fixed power head group and the variable power head group are installed with a tap; B, the aluminum handle is clamped on the workbench and moved to the left, and the left power heads of the fixed power head group and the variable power head group are fed to process a light hole; C, the workbench is moved to the right, and the left power heads of the fixed power head group and the variable power head group are fed to process a wire hole; The bottom of the workbench (81) is slidably connected with the workbench track (8) through a sliding block, and one side of the workbench (81) is connected with a workbench translation driving mechanism (82); The workbench translation driving mechanism (82) comprises a horizontal hydraulic cylinder mounted on the side surface, a connecting plate connected with the piston rod of the hydraulic cylinder, and the connecting plate is fixedly connected with the workbench (81); the hydraulic cylinder is connected with a hydraulic pump (83) at the bottom of the rack through a hydraulic pipe.

5. The method of claim 1, wherein the method further comprises: An aluminum scrap collecting groove (10) is arranged at the bottom of the rack, and a collecting funnel is arranged above the aluminum scrap collecting groove (10). ​

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