Machining method for bent pipe aluminum handle of household appliance

Abstract

According to the machining method for the household appliance elbow aluminum handle, operation such as machining of symmetrical inclined machining holes in the two ends of the household appliance elbow aluminum handle and machining of symmetrical vertical screw holes in the two ends of the household appliance elbow aluminum handle can be achieved. The device can be specially used for machining the bent pipe aluminum handle of the household appliance, the distance and the angle of the power head are adjustable, multiple machining modes are achieved, and the device has the advantages of being high in machining efficiency and machining precision, convenient to operate and the like; and the method is suitable for various processing scenes.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum alloy profile processing, in particular to a method for processing a bent tube aluminum handle of a household appliance. Background Art

[0002] Aluminum profiles are common processing substrates in the industry. It is often necessary to process multiple or multiple groups of anchor holes, threaded holes, etc. on their surfaces. Conventional processing equipment is a CNC machining center, and the processing head moves to the specified position for processing, or the head is replaced before processing. The spacing between multiple groups of processing holes must be guaranteed not only between groups, but also within the group; especially when the same hole needs to be processed multiple times, such as the threaded hole needs to be drilled first and then tapped, the tool processing position must be accurate each time. Under special circumstances, the processing hole position also needs to change the vertical angle.

[0003] Handle aluminum profiles are common aluminum alloy parts in home decoration and home appliances. Their characteristics are: the main body is obtained by bending the tubular profile, and threaded holes need to be processed at both ends of the handle, which are firmly fixed to the furniture door or home appliance door by bolts or screws. Therefore, the processing accuracy of the threaded holes is an important link in the production of bent tube aluminum handles.

[0004] Therefore, when using an ordinary three-axis single-head machining center to process the bent tube aluminum handles in the above situation, the efficiency is extremely low; and the operation of changing the vertical angle processing cannot be completed. For example, Patent 1: A double-station fully automatic pneumatic drilling machine; 202110000087.2; Patent 2: A drilling device for processing hinges; 202121668487.2. Although some double-station processing equipment is also described in the prior art, there is no relevant record of processing equipment specifically used for bent tube aluminum handles. How to design a multifunctional equipment suitable for the processing of bent tube aluminum handles in actual production is a technical problem that technicians in this field need to solve. Summary of the invention

[0005] The purpose of the present invention is to provide a method for processing bent tube aluminum handles for household appliances, which can realize efficient processing of various bent tube 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 be adapted to realize processing of different lengths and different hole spacings, with high adaptability and meeting the needs of flexible production.

[0006] To achieve the above object, the technical solution of the present invention is as follows: A method for processing a household appliance curved tube aluminum handle, which is used to process inclined processing holes symmetrical at both ends of the household appliance curved tube aluminum handle, comprising the following steps: A. Place the aluminum handle on the fixture on the workbench of the processing equipment with the processing surface facing up; B. Adjust the inclination angle of the fixed power head group to the preset angle of the hole to be processed, and also adjust the variable power head group to the preset angle of the hole to be processed; C. Calculate the lateral coordinates of the variable power head group and manually adjust the position of the variable power head group; D. Fix the variable power head group and try to process 1-2 aluminum handles; E. Inspect the processed aluminum handles, and fine-tune the angles of the fixed power head group and the variable power head group, as well as the horizontal position of the variable power head group, for batch processing; A fixed power head group is arranged on the frame of the processing equipment, and a variable power head group is arranged at the same plane height as the frame. The variable power head group is fixed on a power head moving base plate. The power head moving base plate is slidably connected with a power head guide rail through a slider. The power head guide rail is fixed on the frame; a workbench is arranged below the fixed power head group and the variable power head group. The power head adopts an externally purchased drilling power head with its own drive motor. After being connected to the high-pressure air in the workshop, the cylinder inside the power head can drive the drill chuck to feed downward. A coolant nozzle is installed on one side of the power head tool. The nozzle is connected to the coolant pump through a pipe to cool and lubricate the aluminum handle when processing the bent pipe.

[0007] A coordinate scale is arranged on the frame above the fixed power head group and the variable power head group; at the same time, a mark is arranged on the top of each power head for aligning the scale to accurately reflect the coordinate value of each power head on the scale.

[0008] The fixed power head group is installed on the positioning plate A, and the positioning plate A is installed on the frame through a non-powered rotating shaft; an angle scale is set on the edge of the positioning plate A; The variable power head group is installed on the positioning disk B, the positioning disk B is installed on the power head moving base plate through the non-powered rotating shaft, and the positioning disk B is provided with an angle scale.

[0009] The calculation method of the lateral coordinate of the variable power head group adjustment in step C is: ΔL=A-2*sinα*(C+e); Among them: ΔL is the coordinate difference between the variable power head and the fixed power head; A is the spacing between the processing 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 shaft is not extended; e is the extended length of the tool shaft of the fixed power head or the variable power head, which is directly read from the PLC; After ΔL is calculated, ΔL + the top coordinate value of the fixed power head is the horizontal coordinate value to which the variable power head is to move. The horizontal coordinate value of the variable power head calculated by the above formula is of reference significance. The processed bent tube aluminum handle will be placed on a special inspection fixture for inspection. If the hole spacing and inclination are qualified, no fine adjustment is required; if there is a deviation in the hole spacing and inclination, the coordinate value of the variable power head is fine-tuned by the handwheel screw, or the nut of the center axis of the positioning plate A is loosened to adjust the angle.

[0010] A thread block is installed in the middle of the power head moving base plate, the thread hole of the thread block is threadedly connected with the hand wheel screw rod, and the hand wheel screw rod is fixedly installed on the frame through a bearing.

[0011] The equipment can also be used to process symmetrical vertical wire holes at both ends of the bent aluminum handle of household appliances, including the following steps: A. The left power head of the fixed power head group and the variable power head group is equipped with a light hole drill bit, and the right power head of the fixed power head group and the variable power head group is equipped with a tap; B. Clamp the aluminum handle on the workbench and move it to the left. The left power head of the fixed power head group and the variable power head group feeds the processing light hole; C. The workbench moves to the right, and the left power heads of the fixed power head group and the variable power head group feed the processing thread holes; The bottom of the workbench is slidably connected to the workbench track through a slider, and one side of the workbench is connected to the workbench translation drive mechanism; The workbench translation driving mechanism comprises a horizontal hydraulic cylinder installed on the side, the piston rod of the hydraulic cylinder is connected to a connecting plate, 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.

[0012] The workbench is moved horizontally by hydraulic drive; a number of pneumatic clamps are installed on the workbench to clamp aluminum profiles.

[0013] An aluminum chip collecting trough is arranged at the bottom of the frame, and a collecting funnel is arranged above the aluminum chip collecting trough. The processed aluminum chips fall into the collecting trough through the funnel. Advantages of the invention

[0014] The present invention can realize the efficient processing of various bent tube 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 be adapted to realize the processing of different lengths and different hole spacings, with high adaptability and meeting the needs of flexible production.

[0015] The present invention solves the defect that the traditional three-axis machining center cannot process the inclined holes when processing the symmetrical inclined holes at both ends of the aluminum handle, and its cost is greatly reduced compared with the expensive four-axis machining center, which greatly improves the production efficiency and reduces the investment cost of the equipment.

[0016] When processing the symmetrical vertical wire holes at both ends of the aluminum handle, the present invention utilizes the characteristics of the symmetrical processing holes at both ends of the bent tube aluminum handle, and realizes multi-station simultaneous processing of multiple holes of the symmetrical hole processing type aluminum profile through multiple sets of power heads and a workbench that can be moved laterally. Compared with the single-head machining center that processes the holes one by one, the tool stroke is greatly reduced, and the dual tools are fed simultaneously for processing, which greatly improves the processing efficiency. It is calculated that compared with the previous single-head machining center processing solution, the processing efficiency is improved by nearly 400%.

[0017] 4. When the present invention processes symmetrical inclined processing holes at both ends of the aluminum handle, a relatively accurate initial adjustment of the horizontal coordinate value of the variable power head is achieved through the horizontal coordinate scale provided on the equipment and the angle scale on the positioning plate, thereby reducing the time consumed in equipment debugging and saving the cost of testing the machine and testing the materials; the first-time qualified rate of processing symmetrical inclined processing holes at both ends of the aluminum handle of the bent pipe of household appliances is increased from less than 20% to more than 60%. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a main structural diagram of the present invention; Figure 2 It is a side structural diagram of the present invention; Figure 3 Illustration of the process of making symmetrical vertical holes on both ends of the aluminum handle Figure 1 ; Figure 4 Illustration of the process of making symmetrical vertical holes on both ends of the aluminum handle Figure 2 ; Figure 5 It is a schematic diagram of the symmetrical inclined processing holes at both ends of the aluminum handle; Figure 6 The diagram of the calculation of the transverse coordinates of the variable power head group for the symmetrical inclined processing holes at both ends of the aluminum handle; The serial numbers and component names in the figure are: 1-positioning plate A; 2-fixed power head group; 3-power head guide rail; 4-handwheel screw; 5-power head moving base plate; 6-positioning plate B; 7-variable power head group; 8-workbench track; 81-workbench; 82-workbench translation drive mechanism; 83-hydraulic pump; 9-coolant pump; 10-aluminum chip collection trough. DETAILED DESCRIPTION Example 1

[0019] A method for processing a household appliance curved tube aluminum handle, which is used to process inclined processing holes symmetrical at both ends of the household appliance curved tube aluminum handle, comprising the following steps: A. Place the aluminum handle on the fixture on the workbench of the processing equipment with the processing surface facing up; B. Adjust the inclination angle of the fixed power head group to the preset angle of the hole to be processed, and also adjust the variable power head group to the preset angle of the hole to be processed; C. Calculate the lateral coordinates of the variable power head group and manually adjust the position of the variable power head group; D. Fix the variable power head group and try to process 1-2 aluminum handles; E. Inspect the processed aluminum handles, and fine-tune the angles of the fixed power head group and the variable power head group, as well as the horizontal position of the variable power head group, for batch processing; A fixed power head group 2 is arranged on the frame of the processing equipment, and a variable power head group 7 is arranged at the same plane height as the frame. 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 slider, and the power head guide rail 3 is fixed on the frame; a workbench 81 is arranged below the fixed power head group 2 and the variable power head group 7; A coordinate scale is provided on the frame above the fixed power head group 2 and the variable power head group 7; The fixed power head group 2 is installed on the positioning plate A1, and the positioning plate A1 is installed on the frame through a non-powered shaft; an angle scale is set on the edge of the positioning plate A1; The variable power head group 7 is installed on the positioning plate B6, and the positioning plate B6 is installed on the power head moving base plate 5 through a non-powered rotating shaft. The positioning plate B6 is provided with an angle scale.

[0020] In the method for processing the bent tube aluminum handle of household appliances, the method for calculating the transverse coordinates of the variable power head group in step C is: ΔL=A-2*sinα*(C+e); Among them: ΔL is the coordinate difference between the variable power head and the fixed power head; A is the spacing between the processing 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 the variable power head when the tool shaft is not extended, which is 512mm; e is the extended length of the tool shaft of the fixed power head or the variable power head, which is directly read from the PLC as 22mm; Calculated by ΔL=A-2*sinα*(C+e), ΔL=850-2*0.2588*(512+22))=574mm.

[0021] ΔL+fixed power head top coordinate value. The fixed power head top coordinate value is directly read on the ruler as 28mm, that is, the horizontal coordinate value to which the variable power head needs to move is 574+28=602mm.

[0022] A wire block is installed in the middle of the power head moving base plate 5, and the wire hole of the wire block is threadedly connected with the handwheel screw rod 4, and the handwheel screw rod 4 is fixedly installed on the frame through a bearing.

[0023] An aluminum chip collecting trough 10 is arranged at the bottom of the frame, and a collecting funnel is arranged above the aluminum chip collecting trough 10 . Example 2

[0024] A fixed power head group 2 is arranged on the frame of the processing equipment, and a variable power head group 7 is arranged at the same plane height as the frame. 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 slider, and the power head guide rail 3 is fixed on the frame; a workbench 81 is arranged below the fixed power head group 2 and the variable power head group 7; A coordinate scale is provided on the frame above the fixed power head group 2 and the variable power head group 7; A wire block is installed in the middle of the power head moving base plate 5, and the wire hole of the wire block is threadedly connected with the handwheel screw rod 4, and the handwheel screw rod 4 is fixedly installed on the frame through a bearing.

[0025] The method for processing a household appliance bent tube aluminum handle is used for processing symmetrical vertical thread holes at both ends of the household appliance bent tube aluminum handle, and comprises the following steps: A. The left power head of the fixed power head group and the variable power head group is equipped with a light hole drill bit, and the right power head of the fixed power head group and the variable power head group is equipped with a tap; B. Clamp the aluminum handle on the workbench and move it to the left. The left power head of the fixed power head group and the variable power head group feeds the processing light hole; C. The workbench moves to the right, and the left power heads of the fixed power head group and the variable power head group feed the processing thread holes; The bottom of the workbench 81 is slidably connected to the workbench track 8 via a slider, and one side of the workbench 81 is connected to the workbench translation driving mechanism 82; The workbench translation drive mechanism 82 includes a horizontal hydraulic cylinder installed on the side, the piston rod of the hydraulic cylinder is connected to a connecting plate, and the connecting plate is fixedly connected to the workbench 81; the hydraulic cylinder is connected to a hydraulic pump 82 at the bottom of the frame through a hydraulic pipe.

[0026] An aluminum chip collecting trough 10 is arranged at the bottom of the frame, and a collecting funnel is arranged above the aluminum chip collecting trough 10 .

Claims

1. A method for processing bent tube aluminum handles for household appliances, characterized in that: The method is used to process symmetrical inclined holes at both ends of the bent tube aluminum handle of household appliances, including the following steps: A. Place the aluminum handle on the fixture on the workbench of the processing equipment with the processing surface facing up; B. Adjust the inclination angle of the fixed power head group to the preset angle of the hole to be processed, and also adjust the variable power head group to the preset angle of the hole to be processed; C. Calculate the lateral coordinates of the variable power head group and manually adjust the position of the variable power head group; D. Fix the variable power head group and try to process 1-2 aluminum handles; E. Inspect the processed aluminum handles, and fine-tune the angles of the fixed power head group and the variable power head group, as well as the horizontal position of the variable power head group, for batch processing; A fixed power head group (2) is arranged on the frame of the processing equipment, and a variable power head group (7) is also arranged at the same plane height as the frame, 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 to the power head guide rail (3) through a slider, and the power head guide rail (3) is fixed on the frame; a workbench (81) is arranged below the fixed power head group (2) and the variable power head group (7); A coordinate scale is provided on the frame above the fixed power head group (2) and the variable power head group (7); The fixed power head group (2) is mounted on a positioning plate A (1), and the positioning plate A (1) is mounted on a frame via a non-powered rotating shaft; an angle scale is provided on the edge of the positioning plate A (1); The variable power head group (7) is mounted on a positioning disk B (6), the positioning disk B (6) is mounted on a power head moving base plate (5) via a non-powered rotating shaft, and the positioning disk B (6) is provided with an angle scale.

2. According to the method for processing bent tube aluminum handles for household appliances as described in claim 1, the method for calculating the lateral coordinates adjusted by the variable power head group in step C is: ΔL=A-2*sinα*(C+e); in: ΔL is the coordinate difference between the variable power head and the fixed power head; A is the spacing between the processing 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 shaft is not extended; e is the extended length of the tool shaft of the fixed power head or the variable power head, which is directly read from the PLC; After ΔL is calculated, ΔL + the top coordinate value of the fixed power head is the horizontal coordinate value to which the variable power head is to move.

3. The method for processing bent tube aluminum handles of household appliances according to claim 1, characterized in that: A thread block is installed in the middle of the power head moving base plate (5), the thread hole of the thread block is threadably connected with the hand wheel threaded rod (4), and the hand wheel threaded rod (4) is fixedly installed on the frame via a bearing.

4. The method for processing bent tube aluminum handles of household appliances according to claim 1, characterized in that: It is used to process symmetrical vertical wire holes at both ends of the bent tube aluminum handle of household appliances, including the following steps: A. The left power head of the fixed power head group and the variable power head group is equipped with a light hole drill bit, and the right power head of the fixed power head group and the variable power head group is equipped with a tap; B. Clamp the aluminum handle on the workbench and move it to the left. The left power head of the fixed power head group and the variable power head group feeds the processing light hole; C. The workbench moves to the right, and the left power heads of the fixed power head group and the variable power head group feed the processing thread holes; The bottom of the workbench (81) is slidably connected to the workbench track (8) via a slider, and one side of the workbench (81) is connected to a workbench translation drive mechanism (82); The workbench translation drive mechanism (82) comprises a horizontal hydraulic cylinder installed on the side, the piston rod of the hydraulic cylinder is connected to a connecting plate, and the connecting plate is fixedly connected to the workbench (81); the hydraulic cylinder is connected to a hydraulic pump (82) at the bottom of the frame through a hydraulic pipe.

5. The method for processing bent tube aluminum handles of household appliances according to claim 1, characterized in that: An aluminum chip collecting trough (10) is provided at the bottom of the frame, and a collecting funnel is provided above the aluminum chip collecting trough (10).

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