A method for processing frame parts

Abstract

The present invention discloses a frame part processing method, comprising the following steps: (1) rough milling of the contour; (2) rough milling of the inner cavity; (3) rough milling to remove the flange of the blank; (4) fine milling of the upper plane and the outer contour; (5) processing the connector mounting structure and the hole position set on the side of the part; (6) fine milling of the inner cavity, the boss and the hole position. The method can efficiently complete the processing of the frame parts, and the processing accuracy and surface quality of the parts are stable and reliable.

Description

Technical Field

[0001] The invention belongs to the technical field of parts processing, and in particular relates to a frame parts processing method. Background Art

[0002] With the continuous development of electronic technology, electronic products are showing a trend of serialization and modularization. Modular electronic products are increasingly used in various electronic devices. They basically adopt the structural form of encapsulating circuit boards and electronic components in hollow frame-like structural parts, and then encapsulating them with cover plates. However, due to the large amount of material removal and thin walls of hollow frame parts, the parts are greatly deformed during the processing, and the dimensional accuracy and shape position accuracy of the parts are not easy to guarantee.

[0003] The patent with application number 2020110852925 discloses a method for processing hollow frame parts, which first processes ribs in the hollow frame of the part, then cuts the part, and removes the ribs after the cutting is completed. When cutting the ribs in the hollow frame, due to the thin wall between the outer contour and the inner cavity, this method is prone to tool deflection during processing. The patent with application number 2019103897789 discloses a mechanical processing method for frame parts, including the following steps: rough milling the front and back of the part, leaving a process block at the part cavity according to the processing accuracy, and leaving a single-side margin of 0.5mm at the remaining processing locations; fine milling the front and back of the part respectively, manually removing the process block and then fine milling the cavity; because the dimensional accuracy and surface quality requirements are high when processing frame parts, and due to the thin wall between the outer contour and the cavity, this method is used to manually remove the process block at the end, and the dimensional accuracy and surface quality do not meet the requirements. Summary of the invention

[0004] In order to solve the above problems, the present invention aims to provide a frame parts processing method, which can efficiently complete the processing of frame parts, and the parts processing accuracy and surface quality are stable and reliable.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A frame parts processing method comprises the following steps:

[0007] (1) Rough milling of the contour: mill one of the large planes in the thickness direction of the part and mill out two parallel planes on the side of the part; turn over, use the machined large plane as the bottom surface, clamp the two machined parallel planes with a vise, and rough mill the upper plane and the outer contour arranged opposite to the machined large plane to form a blank flange;

[0008] (2) Rough milling of the inner cavity: Based on the outer contour and upper plane processed in step (1), the pressing plate presses the flanges of the blank around the inner cavity, and roughly mills the inner cavity, leaving a margin on the inner cavity. The margin of the inner cavity is larger than the contour of the mounting boss of the inner cavity of the part, and a process boss is provided on the inner cavity wall of the margin; when processing the inner cavity, the intermediate waste is cut by milling along the contour;

[0009] (3) Rough machining to remove the blank flange: remove the intermediate waste material after cutting, turn the part over, clamp it in a vise, rough machine to remove the blank flange in the thickness direction of the part, and then finish machine the upper plane;

[0010] (4) Finishing the upper plane and outer contour: Flip the part again, press the process boss on the inner cavity wall with a pressing plate, finish the upper plane, and then finish the outer contour;

[0011] (5) Connector mounting structure and hole positions set on the side of the processed parts;

[0012] (6) Finishing the inner cavity, mounting bosses and holes: embed the part into the base cavity on the machine table, then press the upper surface of the part with a pressing plate, remove the process bosses by milling, semi-finish the inner cavity and mounting bosses, and finally finish the inner cavity, mounting bosses and holes.

[0013] In the step (1), the upper plane is milled out by 0.5mm-1mm; the outer contour has a single-sided allowance of 1mm-2mm, and when the outer contour is roughly processed, the processing depth is 1mm greater than the thickness of the part.

[0014] In the step (2), the inner cavity margin is 3mm-5mm larger than the outline of the inner cavity mounting boss of the part.

[0015] In the step (2), the intermediate waste is cut by milling along the contour, and the milling width is 1.2-1.5 times the diameter of the tool.

[0016] In the step (2), before rough machining the inner cavity, a process hole is set in the hollow area of ​​the part; the part is fixed to the base plate of the machine tool workbench by screws passing through the process hole.

[0017] In the step (3), after rough machining to remove the flange of the blank in the thickness direction of the part, the thickness after machining is 1 mm greater than the actual thickness of the part; after fine machining of the upper plane, the thickness after machining is 0.5 mm greater than the actual thickness of the part.

[0018] In the step (4), after finishing the upper plane, the thickness dimension after finishing is consistent with the actual thickness dimension of the part; and after finishing the outer contour, the outer contour dimension after finishing is consistent with the actual outer contour dimension of the part.

[0019] In the step (6), the part outer contour and the substrate cavity are clearance matched, the clearance value range is 0.02mm-0.04mm, and the depth of the substrate cavity is 0.5mm-1mm smaller than the part thickness.

[0020] In the step (6), when semi-finishing the inner cavity and installing the boss, a single-sided allowance of 0.5 mm is left.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. When rough machining the inner cavity, leave a machining allowance that exceeds the contour of the mounting boss of the inner cavity of the part by 3-5mm, so that the part machining is rigid enough, avoiding the phenomenon of tool letting go, and the surface of the part will not bulge outward.

[0023] 2. When rough machining the inner cavity, adopt milling along the contour to cut the intermediate waste, and the milling width is 1.2-1.5 times the tool diameter; it is not necessary to remove all the blank materials in the hollow part of the part by milling, and the production efficiency is high; in addition, the milling width is 1.2-1.5 times the tool diameter, which is convenient for chip removal and avoids the tool from being stuck.

[0024] 3. When rough machining the inner cavity, a process boss is left to facilitate the subsequent fine machining of the outer contour, avoiding the processing method of machining the outer contour by removing and replacing the pressure plate, which is highly efficient and light and low in labor.

[0025] 4. After finishing the outer contour, the structure on the side is processed. Since the inner cavity has not been finished at this time and the parts are rigid enough, it is convenient to position and clamp the structure on the side, and the processing accuracy is easy to ensure.

[0026] 5. After all the outer contours and structural features on the side are processed, the inner cavity can be fine-machined. When fine-machining the inner cavity, the outer contour is surrounded by the substrate cavity to avoid the tool deflection caused by thin walls during processing, and at the same time avoid the phenomenon of bulging of the processed surface. The processing accuracy and surface quality are excellent, stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the structure of the frame parts processed by the processing method of the present invention;

[0029] Figure 2 It is a schematic diagram of the part processing structure of the rough milling processing contour in the present invention;

[0030] Figure 3 It is a schematic diagram of the parts processing structure of rough milling inner cavity in the present invention;

[0031] In the figure, 1-part; 11-large plane; 2-mounting boss; 3-blank flange; 4-process boss; 5-process hole. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various modifications, substitutions and changes made according to the common technical knowledge and customary means in the field are included in the scope of the present invention.

[0033] A frame parts processing method in the present invention is used to process Figure 1 Part 1 shown includes the following steps:

[0034] (1) Rough milling of the contour: mill one of the large planes 11 in the thickness direction of the part and mill out two parallel planes on the side of the part; turn over, use the machined large plane 11 as the bottom surface, clamp the two machined parallel planes with a vise, and roughly mill the upper plane and the outer contour arranged opposite to the machined large plane 11 to form the blank flange 3;

[0035] (2) Rough milling of the inner cavity: Based on the outer contour and upper plane processed in step (1), the pressing plate presses the surrounding blank flange 3, and roughly mills the inner cavity, leaving a margin on the inner cavity. The margin of the inner cavity is larger than the contour of the inner cavity mounting boss 2 of the part, and a process boss 4 is provided on the inner cavity wall of the margin. When processing the inner cavity, the intermediate waste is cut by milling along the contour;

[0036] (3) Rough machining to remove the blank flange 3: Take out the intermediate waste after cutting, turn the part over, clamp it in a vise, and roughly machine to remove the blank flange 3 in the thickness direction of the part, and then fine machine the upper plane;

[0037] (4) Finishing the upper plane and outer contour: Flip the part again, press the process boss 4 on the inner cavity wall with a pressing plate, finish the upper plane, and then finish the outer contour;

[0038] (5) Connector mounting structure and hole positions set on the side of the processed parts;

[0039] (6) Finishing the inner cavity, mounting boss 2 and holes: embed the part into the base plate cavity on the machine table, then press the upper plane of the part with a pressing plate, remove the process boss 4 by milling, semi-finish the inner cavity, mounting boss 2, and finally finish the inner cavity, mounting boss 2 and holes.

[0040] In the step (1), the upper plane is milled out by 0.5mm-1mm; the outer contour has a single-sided allowance of 1mm-2mm, and when the outer contour is roughly processed, the processing depth is 1mm greater than the thickness of the part.

[0041] In the step (2), the inner cavity margin is 3mm-5mm larger than the outline of the part inner cavity mounting boss 2.

[0042] In the step (2), the intermediate waste is cut by milling along the contour, and the milling width is 1.2-1.5 times the diameter of the tool.

[0043] In the step (2), before rough machining the inner cavity, a process hole 5 is set in the hollow area of ​​the part; the part is fixed to the base plate of the machine tool workbench by screws passing through the process hole 5.

[0044] In the step (3), after rough machining to remove the rough flange 3 in the thickness direction of the part, the thickness after machining is 1 mm greater than the actual thickness of the part; after fine machining of the upper plane, the thickness after machining is 0.5 mm greater than the actual thickness of the part.

[0045] In the step (4), after finishing the upper plane, the thickness dimension after finishing is consistent with the actual thickness dimension of the part; and after finishing the outer contour, the outer contour dimension after finishing is consistent with the actual outer contour dimension of the part.

[0046] In the step (6), the part outer contour and the substrate cavity are clearance matched, the clearance value range is 0.02mm-0.04mm, and the depth of the substrate cavity is 0.5mm-1mm smaller than the part thickness.

[0047] When semi-finishing the inner cavity and installing the boss 2, leave a single-sided allowance of 0.5mm.

[0048] Specifically, one of the large planes 11 in the thickness direction of the part 1 is milled, and the large plane 11 can be milled out; two parallel planes on the side of the part 1 are milled out, and the two planes can be milled out; turn over, with the processed large plane 11 as the bottom surface, clamp the two processed parallel planes with a vise, and roughly mill the upper plane and the outer contour that are relatively set with the processed large plane 11 to form a blank flange 3; the upper plane is milled out by 0.5mm-1mm, and the upper plane mentioned here refers to another plane in the thickness direction of the milling process, that is, the plane that is relatively set with the large plane 11; the outer contour has a single-sided allowance of 1mm-2mm, and in this embodiment, the single-sided allowance of the outer contour can be 2mm or 1mm; and when rough-machining the outer contour, the machining depth is 1mm greater than the thickness of the part 1. Refer to Figure 2 The schematic diagram of the parts processing structure shown in the figure is formed after the above processing steps. Figure 2The step-shaped structure shown in the figure forms a rough flange 3 , and the portion above the rough flange 3 is a structure after the rough machining of the outer contour of the frame part 1 .

[0049] Based on the processed outer contour and upper plane, the pressure plate presses the surrounding rough flange 3 and roughly mills the inner cavity; a margin is left on the inner cavity, and the inner cavity margin is larger than the contour of the inner cavity mounting boss 2 of the part, and the inner cavity margin is 3mm-5mm larger than the contour of the inner cavity mounting boss 2 of the part 1. As a preferred solution of this embodiment, the inner cavity margin is 4mm larger than the contour of the inner cavity mounting boss 2 of the part 1. In other embodiments, it can also be 3mm, 5mm, etc.; the margin makes the processing rigidity of the part 1 sufficient, avoids the phenomenon of tool letting, and the surface of the part 1 will not bulge outward. At the same time, process bosses 4 are evenly arranged on the inner cavity wall of the margin, which is convenient for subsequent fine processing of the outer contour and avoids the processing method of processing the outer contour by replacing the pressure plate, which is efficient and low in labor intensity. When processing the inner cavity, the processing depth penetrates the entire thickness of the blank, and the intermediate waste is cut along the contour to release the processing stress. The milling width is 1.2-1.5 times the tool diameter, preferably 1.4 times. In other embodiments, it can be selected according to the processing needs. When processing the inner cavity, it is not necessary to remove all the blank materials in the hollow part of the part 1 by milling, which has high production efficiency. In addition, the milling width is 1.2-1.5 times the tool diameter, which is convenient for chip removal and avoids the tool from being stuck. Referring to the schematic diagram of the part processing structure shown in Figure 3, before rough processing the inner cavity, process holes 5 are evenly arranged in the hollow area of ​​the part 1; the part 1 is fixed to the base plate of the machine tool workbench by screws passing through the process holes 5; that is, the blank material of the part 1 in the hollow area is tightly suspended on the base plate on the machine tool workbench by screws to prevent the blank in this area from moving when milling through.

[0050] After rough milling the inner cavity, remove the cut intermediate waste, turn over part 1, clamp it in a vise, and roughly machine the rough flange 3 in the thickness direction of part 1. The thickness dimension after machining is 1mm larger than the actual thickness of part 1; then fine machine the upper plane. The thickness dimension after machining is 0.5mm larger than the actual thickness of part 1. After the fine machining of the upper plane is completed, turn over part 1 again, press the process boss 4 on the inner cavity wall with a pressure plate, and fine machine the upper plane again. The thickness dimension after machining is consistent with the actual thickness dimension of part 1; then fine machine the outer contour. The outer contour dimension after machining is consistent with the actual outer contour dimension of part 1.

[0051] After finishing the upper plane and the outer contour, the connector installation structure and hole positions set on the side of part 1 are processed; after finishing the upper plane and the outer contour, the structural features on the side are processed. Since the inner cavity has not been finished at this time, part 1 is rigid enough. At this time, the structural features on the side are convenient for positioning and clamping, and the processing accuracy is easy to ensure. After the outer contour and the structural features on the side are all processed, the inner cavity is finished. The specific operation is to embed the part 1 into the substrate cavity on the machine table, so that the substrate cavity surrounds the outer contour of the part 1, and the substrate cavity and the outer contour of the part 1 are in a clearance fit, the clearance is 0.02-0.04mm, preferably 0.03mm, and the clearance can also be 0.02mm, 0.04mm, etc.; the depth of the substrate cavity is 0.5mm-1mm less than the thickness of the part 1. As a preferred solution of this embodiment, the depth of the substrate cavity is 0.8mm less than the thickness of the part 1. In other embodiments, it can also be 0.6mm, 0.7mm, 0.9mm, etc.; then use a pressing plate to press the upper plane of the part 1, milling to remove the process boss 4, semi-finish the inner cavity and the mounting boss 2, leaving a single-sided margin of 0.5mm, and finally finish the inner cavity, the mounting boss 2 and the hole position. When finishing the inner cavity, the outer contour is surrounded by the substrate cavity, which avoids the phenomenon of tool letting caused by thin walls during processing, and at the same time avoids the phenomenon of the processing surface bulging outward, and the processing accuracy and surface quality are excellent, stable and reliable.

[0052] The present invention ensures the processing accuracy and surface quality of the frame parts by rough machining the contour, milling the inner cavity, cutting the intermediate waste, setting the process boss 4, finishing the outer contour, processing the structural features on the side, and finally finishing the inner cavity, and has high production efficiency and low cost.

[0053] The above is a detailed introduction to a frame parts processing method provided by the present invention. This article uses specific examples to illustrate the structure and working principle of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A frame parts processing method, characterized in that: The steps include: (1) Rough milling of the contour: milling one of the large planes (11) in the thickness direction of the part and milling out two parallel planes on the side of the part; turning over, using the processed large plane (11) as the bottom surface, clamping the two processed parallel planes with a vise, and rough milling the upper plane and the outer contour arranged opposite to the processed large plane (11) to form a blank flange (3); (2) Rough milling of the inner cavity: taking the outer contour and the upper plane processed in step (1) as the reference, the pressing plate presses the surrounding blank flanges (3), and roughly mills the inner cavity, leaving a margin on the inner cavity, the inner cavity margin being larger than the contour of the inner cavity mounting boss (2) of the part, and a process boss (4) is provided on the inner cavity wall of the margin; when processing the inner cavity, the intermediate waste is cut by milling along the contour; (3) Rough machining to remove the blank flange (3): remove the intermediate waste material cut off, turn the part over, clamp it in a vise, and roughly machine the blank flange (3) in the thickness direction of the part, and then fine machine the large surface; (4) Finishing the upper plane and outer contour: Flip the part again, press the process boss (4) on the inner cavity wall with a pressing plate, finish the upper plane, and then finish the outer contour; (5) Connector mounting structure and hole positions set on the side of the processed parts; (6) Finishing the inner cavity, mounting boss (2) and hole positions: The part is embedded in the base plate cavity on the machine table, and then the upper plane of the part is pressed with a pressing plate, and the process boss (4) is removed by milling, and the inner cavity and mounting boss (2) are semi-finished, and finally the inner cavity, mounting boss (2) and hole positions are finish-machined.

2. A frame parts processing method according to claim 1, characterized in that: In the step (1), the upper plane is milled out by 0.5mm-1mm; the outer contour has a single-sided allowance of 1mm-2mm, and when the outer contour is roughly processed, the processing depth is 1mm greater than the thickness of the part.

3. A frame parts processing method according to claim 1, characterized in that: In the step (2), the inner cavity margin is 3 mm to 5 mm larger than the outline of the part inner cavity mounting boss (2).

4. A frame parts processing method according to claim 1, characterized in that: In the step (2), the intermediate waste is cut by milling along the contour, and the milling width is 1.2-1.5 times the diameter of the tool.

5. A frame parts processing method according to claim 1, characterized in that: In the step (2), before rough machining the inner cavity, a process hole (5) is provided in the hollow area of ​​the part; the part is fixed to the base plate of the machine tool workbench by screws passing through the process hole (5).

6. A frame parts processing method according to claim 1, characterized in that: In the step (3), after rough machining to remove the rough flange (3) in the thickness direction of the part, the thickness after machining is 1 mm greater than the actual thickness of the part; after fine machining of the large plane, the thickness after machining is 0.5 mm greater than the actual thickness of the part.

7. A frame parts processing method according to claim 1, characterized in that: In the step (4), after finishing the upper plane, the thickness dimension after finishing is consistent with the actual thickness dimension of the part; and after finishing the outer contour, the outer contour dimension after finishing is consistent with the actual outer contour dimension of the part.

8. A frame parts processing method according to claim 1, characterized in that: In the step (6), the part outer contour and the substrate cavity are clearance matched, the clearance value range is 0.02mm-0.04mm, and the depth of the substrate cavity is 0.5mm-1mm smaller than the part thickness.

9. A frame parts processing method according to claim 1, characterized in that: In the step (6), when semi-finishing the inner cavity and installing the boss (2), a single-sided allowance of 0.5 mm is left.

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