A method for machining a frame-shaped part

Abstract

This invention relates to the field of industrial product manufacturing technology, and in particular to a method for processing frame-shaped parts. The method includes: S1: initial selection of the frame-shaped part's positioning reference; S2: re-determining the positioning reference before starting work; S3: determining the overlap distance of the bosses on the frame-shaped parts; S4: setting the processing route based on the processing dimensions of the frame-shaped parts; S5: loosening the tooling and disassembling to obtain the part. This invention achieves refined and flexible control of the overall process by having workers select the positioning reference before starting work, using a rib overlap method to overlap the bosses, and then continuing to set the processing route. This enhances the actual operational performance of the overall process and improves upon the existing methods that cannot effectively control processing costs during the processing of frame-shaped parts.

Description

Technical Field

[0001] This invention is a divisional application of the patent application entitled "A Method for Processing Frame-Shaped Parts", filed on April 7, 2023, with application number 2023103656558.

[0002] This invention relates to the field of industrial product manufacturing technology, specifically a method for processing frame-shaped parts. Background Technology

[0003] Parts are the basic elements of a machine. Frame-shaped parts, as the name suggests, are frame-shaped parts. A machine generally includes one or more prime movers (such as electric motors, internal combustion engines, and steam engines) that receive external energy, execution parts that realize the machine's production functions (such as cutting tools in machine tools), transmission parts that transmit the motion and power of the prime mover to the execution parts (such as gear and screw transmission mechanisms in machine tools), and detection and control systems that ensure the coordinated operation of various parts in the machine (such as CNC systems in machine tools). (That is, a machine consists of prime movers, transmission parts, execution parts, and measurement and control parts.) By further decomposing the machine, various types of parts can be obtained.

[0004] The current processing of frame-shaped parts is costly due to the high costs associated with it. It not only wastes more electricity but also places a significant burden on enterprises in terms of labor hours and material consumption. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the prior art by providing a method for processing frame-shaped parts, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a method for processing a frame-shaped part, comprising the following steps:

[0007] S1: Initial selection of the positioning datum for frame-type parts;

[0008] The part has a large smooth surface, and the web is only 1.2 millimeters thick. The part is open over a large area, and the ribs are symmetrically distributed with a large span. There are only two ribs in the Y direction. Therefore, in order to better ensure its machinability, the large smooth surface is selected as the Z-direction reference during machining, and the X and Y directions are positioned using the classic two-pin positioning.

[0009] S2: Re-establish the positioning benchmark before commencing work;

[0010] All the edges of the frame-shaped parts need to be drilled and countersunk. In order to meet the positional requirements, according to the principle of economy, drilling jigs can be used to drill the holes. Based on the principle of unified reference, the large smooth surface is set as the Z-axis reference, and the X and Y axes are based on the holes of 2-12.5 (+0.016 / +0.033) mm on the parts.

[0011] S3: Determine the overlap distance of the bosses on frame-type components;

[0012] The overlap distance between the frame-shaped parts and the boss is 0.2mm. With the 0.2mm distance determined, the boss can be removed after finishing by using the rib overlap method while meeting the processing and clamping requirements. The boss is only connected to the part by 0.2mm, which reduces the workload of the fitter in removing the boss and also reduces the risk to the fitter, i.e., the edge trimmer can be used for chamfering.

[0013] S4: Set the process route according to the processing dimensions of the frame-type parts;

[0014] S41: Fitter operation;

[0015] Mark the dimensions on the side of the material according to the drawing requirements. Then, use an electric pistol drill to drill a center hole at the intersection of the marked lines. Next, use an electric pistol drill to drill a 4-Ø10.3 bottom hole, not exceeding 30 mm in depth. It is best to use an M12 die to tap a 4-M12 lifting hole with an effective thread depth greater than 20 mm.

[0016] S42: CNC milling operation;

[0017] Clamp and tighten the parts according to the process sketch, and check that the gap between the bottom surfaces of the parts does not exceed 0.5 mm. Then, install the tool according to the process requirements, align the parts, determine the origin, process the product according to the process requirements, and then check the parts again according to the process sketch requirements.

[0018] S43: Fitter's alignment;

[0019] According to the process sketch requirements, verify that the deformation of the part does not exceed 7mm. In accordance with the rolling and straightening principle, confirm the deformation correction point. After confirming the correction point, use special rolling and straightening equipment and tools to straighten the part, and use a feeler gauge to check the deformation.

[0020] S44: Deburring by fitter;

[0021] Clamp the parts according to the process sketch, check the gap with a feeler gauge to ensure it does not exceed 0.3mm, install the reversing device on the electric drill gun, process the bottom hole of the part according to the drill jig, use the drill jig to countersink the drill bit to flatten the part, remove local sharp edges and burrs, and use fine sandpaper to polish the local unevenness of the tool joint.

[0022] S5: Loosen the tooling and disassemble to obtain the part; compare it with the shape inspection sample.

[0023] Furthermore, step S42 includes: step 1, dividing the CNC milling area according to the component structure; step 2, setting different specifications of cutting tools and tool order according to the divided CNC milling area, setting the cutting fluid flow rate, and recording the process usage time; step 3, verifying step 2 at the start of operation, and executing step 2 if the verification result meets the component requirements; if it does not meet the component requirements, changing the cutting tools and tool order used in step 2, verifying the result again to meet the component requirements, and executing step 2 until the step verification result meets the machining dimension requirements.

[0024] Furthermore, step 1 is divided into three CNC milling areas based on the frame-shaped component: CNC milling area for machining positioning holes and pin holes; rough and finish milling area for large smooth surfaces; and rough and finish milling area for frame surfaces.

[0025] Dividing different components into different CNC milling zones is a refined technical solution that emphasizes machining accuracy and efficiency while reducing tool wear and saving machining costs. A frame-shaped component can have 3, 4, 5, or 6 CNC milling zones, etc. The more zones selected, the more complex the tooling becomes.

[0026] Furthermore, in step 2, different specifications of cutting tools and tool order are set for the milling area of ​​the positioning holes and pin holes, the cutting fluid flow rate is set, and the process time is recorded.

[0027] The first time a 20mm diameter end mill with a bottom tooth radius of 0mm was used, the AP axial cutter depth was 4mm, the AE radial cutter depth was 20mm, the spindle speed S was 5500 rpm, the feed rate F was 4000mm / min, the cutting fluid flow rate was 30L / min, and the working time was t1 hour.

[0028] The second operation used a 120mm diameter end mill with a bottom tooth radius of 0mm, an axial cutter depth of 80mm (AP), a radial cutter depth of 1mm (AE), a spindle speed of 3000 rpm (S), a feed rate of 1500mm / min (F), and a cutting fluid flow rate of 10L / min; the operation time was t2 hours.

[0029] The third time, a center drill was used, with a radial cutter depth of 0.5 mm, a spindle speed of 2000 rpm, a feed rate of 100 mm / min, and a cutting fluid flow rate of 10 L / min; the working time was t3 hours.

[0030] The fourth time, a 13mm diameter drill bit was used, the spindle speed S was 1000 rpm, the feed F was 100mm / min, and the cutting fluid flow rate was 10L / min; the working time t was 4 hours.

[0031] The fifth time, a 12mm diameter end mill with a bottom tooth radius of 0 was used. The spindle speed S was 2000 rpm, the feed rate F was 200mm / min, and the cutting fluid flow rate was 10L / min. The working time was t5 hours.

[0032] The total milling time for step 1 is 11 hours, i.e., t1+t2+t3+t4+t5=11 hours.

[0033] Step 1: Total cutting fluid consumption L equals

[0034] t1*60 minutes*30 L / min+t2*60 minutes*10 L / min+t3*60 minutes*10 L / min+t4*60 minutes*10 L / min+t5*60 minutes*10 L / min

[0035] Furthermore, in step 2, different specifications of cutting tools and tool order are set for rough and finish milling of the large smooth surface area, the cutting fluid flow rate is set, and the process time is recorded.

[0036] Furthermore, in step 2, rough and finish mill the large smooth surface; use a special vacuum clamp to fix it to ensure that the thin wall is qualified.

[0037] The first time a 20mm diameter end mill with a bottom tooth radius of 0mm was used, the AP axial cutter depth was 4mm, the AE radial cutter depth was 20mm, the spindle speed S was 5500 rpm, the feed rate F was 4000mm / min, the cutting fluid flow rate was 30L / min, and the working time t was 6 hours.

[0038] The second operation used a 20mm diameter end mill with a 1mm root tooth radius, an axial cutter depth of 0.15mm for AP, a radial cutter depth of 0.5mm for AE, a spindle speed of 5500 rpm, a feed rate of 4000mm / min, and a cutting fluid flow rate of 30L / min; the operating time was 7 hours.

[0039] The third operation used an 8mm diameter end mill with a 1mm bottom tooth radius, an AP axial cutter depth of 0.15mm, an AE radial cutter depth of 0.5mm, a spindle speed S of 5500 rpm, a feed rate F of 3000mm / min, and a cutting fluid flow rate of 30L / min; the operating time was t8 hours.

[0040] The total milling time for step 2 is 22 hours, i.e., t6 + t7 + t8 = 22 hours.

[0041] Step 2: Total cutting fluid consumption L equals

[0042] t6*60 minutes*30 L / min + t7*60 minutes*30 L / min + t8*60 minutes*30 L / min

[0043] Furthermore, in step 2, different specifications of cutting tools and tool order are set for the rough and finish milling of the frame surface area, the cutting fluid flow rate is set, and the process time is recorded.

[0044] The first time a 40mm diameter end mill with a root tooth radius of 0.8mm was used, the AP axial cutter depth was 4mm, the AE radial cutter depth was 32mm, the spindle speed S was 6000 rpm, the feed rate F was 4000mm / min, the cutting fluid flow rate was 30L / min, and the working time t was 9 hours.

[0045] The second operation used a 20mm diameter end mill with a 3mm root tooth radius, an AP axial cutter depth of 0.15mm, an AE radial cutter depth of 0.5mm, a spindle speed S of 5500 rpm, a feed rate F of 4000mm / min, and a cutting fluid flow rate of 30L / min; the operating time was t10 hours.

[0046] The third time, a 16mm diameter end mill with a 4mm bottom tooth radius was used. The AP axial cutter depth was 0.5mm, the AE radial cutter depth was 10mm, the spindle speed S was 3500 rpm, the feed rate F was 1500mm / min, and the cutting fluid flow rate was 20L / min. The working time t was 11 hours.

[0047] The fourth time, a 20mm diameter end mill with a bottom tooth radius of 3mm was used. The axial cutter depth of AP was 0.15mm, the radial cutter depth of AE was 0.5mm, the spindle speed of S was 5500 rpm, the feed rate of F was 4000mm / min, and the cutting fluid flow rate was 20L / min. The working time was t12 hours.

[0048] The fifth operation used a 6mm diameter end mill with a root tooth radius of 3, an axial cutter depth of 0.15mm for AP, a radial cutter depth of 0.5mm for AE, a spindle speed of 5500 rpm, a feed rate of 3000mm / min, and a cutting fluid flow rate of 30L / min; the working time was t13 hours.

[0049] The sixth operation used a 12mm diameter end mill with a bottom tooth radius of 4, an axial cutter depth of 0.15mm for AP, a radial cutter depth of 0.5mm for AE, a spindle speed of 5500 rpm, a feed rate of 3000mm / min, and a cutting fluid flow rate of 30L / min; the operating time was 14 hours.

[0050] The seventh operation used a 16mm diameter end mill with a bottom tooth radius of 0mm, an axial cutter depth of 20mm for AP, a radial cutter depth of 0.5mm for AE, a spindle speed of 3500 rpm, a feed rate of 1200mm / min, and a cutting fluid flow rate of 10L / min; the operating time was 15 hours.

[0051] The eighth time, a boring tool was used, with AP axial cutter depth of 0.5mm, AE radial cutter depth of 0.5mm, spindle speed S of 200 rpm, feed rate F of 20mm / min, and cutting fluid flow rate of 10L / min; working time t of 16 hours.

[0052] The total milling time for step 3 is 110 hours, i.e., t9+t10+t11+t12+t13+t14+t15+t16=110 hours.

[0053] Step 3: Total cutting fluid consumption L equals

[0054] t9*60min*30L / min+t10*60min*30L / min+t11*60min*20L / min+t12*60min*20L / min+t13*60min*30L / min+t14*60min*30L / min+t15*60min*10L / min+t16*60min*10L / min

[0055] Furthermore, in step 3 of S42, step 2 is verified at the start of the process. The verification is based on the dimensions of the processed parts. If the verification result meets the requirements of the parts, step 2 is executed. If the result does not meet the requirements of the parts, the tool and tool order used in step 2 are changed, and the verification result is verified again to meet the requirements of the parts. Step 2 is executed again until the verification result meets the processing dimension requirements.

[0056] The present invention has the following beneficial effects:

[0057] The processing method for this frame-shaped part involves workers selecting a positioning datum to ensure the accuracy of the positioning datum.

[0058] The bosses of the present invention are joined together by a rib lap splicing method according to the requirements of the components, which reduces the time required for construction and the risk of personnel injury.

[0059] The process route for dividing the CNC milling area is set up to enable the use of different specifications of tools in different areas and to formulate different usage sequences to achieve fine machining, minimize tool damage, and control the amount of cutting fluid used according to the progress of various CNC milling processes.

[0060] The component processing method of this invention enhances the actual operational performance of the overall process and improves the situation where the processing cost of existing frame-shaped parts cannot be effectively controlled. Attached Figure Description

[0061] Figure 1 This is a structural diagram of the components of the present invention;

[0062] Figure 2This is a schematic diagram of the overlapping method of the boss in this invention;

[0063] Figure 3 This is a schematic diagram of the vacuum suction clamp specifically designed for this invention;

[0064] Figure 4 This is a schematic diagram of the shape inspection sample of the present invention; Detailed Implementation

[0065] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0066] Please see Figure 1-4 In this embodiment: a method for processing a frame-shaped part includes the following steps:

[0067] S1: Initial selection of the positioning datum for frame-type parts;

[0068] The part has a large smooth surface, and the web is only 1.2 millimeters thick. The part is open over a large area, and the ribs are symmetrically distributed with a large span. There are only two ribs in the Y direction. Therefore, in order to better ensure its machinability, the large smooth surface is selected as the Z-direction reference during machining, and the X and Y directions are positioned using the classic two-pin positioning.

[0069] S2: Re-establish the positioning benchmark before commencing work;

[0070] All the edges of the frame-shaped parts need to be drilled and countersunk. In order to meet the positional requirements, according to the principle of economy, drilling jigs can be used to drill the holes. Based on the principle of unified reference, the large smooth surface is set as the Z-axis reference, and the X and Y axes are based on the holes of 2-12.5 (+0.016 / +0.033) mm on the parts.

[0071] S3: Determine the overlap distance of the bosses on frame-type components;

[0072] The overlap distance between the frame-shaped parts and the boss is 0.2mm. With the 0.2mm distance determined, the boss can be removed after finishing by using the rib overlap method while meeting the processing and clamping requirements. The boss is only connected to the part by 0.2mm, which reduces the workload of the fitter in removing the boss and also reduces the risk to the fitter, i.e., the edge trimmer can be used for chamfering.

[0073] S4: Set the process route according to the processing dimensions of the frame-type parts;

[0074] S41: Fitter operation;

[0075] Mark the dimensions on the side of the material according to the drawing requirements. Then, use an electric pistol drill to drill a center hole at the intersection of the marked lines. Next, use an electric pistol drill to drill a 4-Ø10.3 bottom hole, not exceeding 30 mm in depth. It is best to use an M12 die to tap a 4-M12 lifting hole with an effective thread depth greater than 20 mm.

[0076] S42: CNC milling operation;

[0077] Clamp and tighten the parts according to the process sketch, and check that the gap between the bottom surfaces of the parts does not exceed 0.5 mm. Then, install the tool according to the process requirements, align the parts, determine the origin, process the product according to the process requirements, and then check the parts again according to the process sketch requirements.

[0078] S43: Fitter's alignment;

[0079] According to the process sketch requirements, verify that the deformation of the part does not exceed 7mm. In accordance with the rolling and straightening principle, confirm the deformation correction point. After confirming the correction point, use special rolling and straightening equipment and tools to straighten the part, and use a feeler gauge to check the deformation.

[0080] S44: Deburring by fitter;

[0081] Clamp the parts according to the process sketch, check the gap with a feeler gauge to ensure it does not exceed 0.3mm, install the reversing device on the electric drill gun, process the bottom hole of the part according to the drill jig, use the drill jig to countersink the drill bit to flatten the part, remove local sharp edges and burrs, and use fine sandpaper to polish the local unevenness of the tool joint.

[0082] S5: Loosen the tooling and disassemble to obtain the part; compare it with the shape inspection sample.

[0083] Furthermore, step S42 includes: step 1, dividing the CNC milling area according to the component structure; step 2, setting different specifications of cutting tools and tool order according to the divided CNC milling area, setting the cutting fluid flow rate, and recording the process usage time; step 3, verifying step 2 at the start of operation, and executing step 2 if the verification result meets the component requirements; if it does not meet the component requirements, changing the cutting tools and tool order used in step 2, verifying the result again to meet the component requirements, and executing step 2 until the step verification result meets the machining dimension requirements.

[0084] Furthermore, step 1 is divided into three CNC milling areas based on the frame-shaped component: CNC milling area for machining positioning holes and pin holes; rough and finish milling area for large smooth surfaces; and rough and finish milling area for frame surfaces.

[0085] Furthermore, in step 2, different specifications of cutting tools and tool order are set for the milling area of ​​the positioning holes and pin holes, the cutting fluid flow rate is set, and the process time is recorded.

[0086] The first time a 20mm diameter end mill with a bottom tooth radius of 0mm was used, the AP axial cutter depth was 4mm, the AE radial cutter depth was 20mm, the spindle speed S was 5500 rpm, the feed rate F was 4000mm / min, the cutting fluid flow rate was 30L / min, and the working time was t1 hour.

[0087] The second operation used a 120mm diameter end mill with a bottom tooth radius of 0mm, an axial cutter depth of 80mm (AP), a radial cutter depth of 1mm (AE), a spindle speed of 3000 rpm (S), a feed rate of 1500mm / min (F), and a cutting fluid flow rate of 10L / min; the operation time was t2 hours.

[0088] The third time, a center drill was used, with a radial cutter depth of 0.5 mm, a spindle speed of 2000 rpm, a feed rate of 100 mm / min, and a cutting fluid flow rate of 10 L / min; the working time was t3 hours.

[0089] The fourth time, a 13mm diameter drill bit was used, the spindle speed S was 1000 rpm, the feed F was 100mm / min, and the cutting fluid flow rate was 10L / min; the working time t was 4 hours.

[0090] The fifth time, a 12mm diameter end mill with a bottom tooth radius of 0 was used. The spindle speed S was 2000 rpm, the feed rate F was 200mm / min, and the cutting fluid flow rate was 10L / min. The working time was t5 hours.

[0091] The total milling time for step 1 is 11 hours, i.e., t1+t2+t3+t4+t5=11 hours.

[0092] Step 1: Total cutting fluid consumption L equals

[0093] t1*60 minutes*30 L / min+t2*60 minutes*10 L / min+t3*60 minutes*10 L / min+t4*60 minutes*10 L / min+t5*60 minutes*10 L / min

[0094] Furthermore, in step 2, different specifications of cutting tools and tool order are set for rough and finish milling of the large smooth surface area, the cutting fluid flow rate is set, and the process time is recorded.

[0095] Furthermore, in step 2, rough and finish mill the large smooth surface; use a special vacuum clamp to fix it to ensure that the thin wall is qualified.

[0096] The first time a 20mm diameter end mill with a bottom tooth radius of 0mm was used, the AP axial cutter depth was 4mm, the AE radial cutter depth was 20mm, the spindle speed S was 5500 rpm, the feed rate F was 4000mm / min, the cutting fluid flow rate was 30L / min, and the working time t was 6 hours.

[0097] The second operation used a 20mm diameter end mill with a 1mm root tooth radius, an axial cutter depth of 0.15mm for AP, a radial cutter depth of 0.5mm for AE, a spindle speed of 5500 rpm, a feed rate of 4000mm / min, and a cutting fluid flow rate of 30L / min; the operating time was 7 hours.

[0098] The third operation used an 8mm diameter end mill with a 1mm bottom tooth radius, an AP axial cutter depth of 0.15mm, an AE radial cutter depth of 0.5mm, a spindle speed S of 5500 rpm, a feed rate F of 3000mm / min, and a cutting fluid flow rate of 30L / min; the operating time was t8 hours.

[0099] The total milling time for step 2 is 22 hours, i.e., t6 + t7 + t8 = 22 hours.

[0100] Step 2: Total cutting fluid consumption L equals

[0101] t6*60 minutes*30 L / min + t7*60 minutes*30 L / min + t8*60 minutes*30 L / min

[0102] Furthermore, in step 2, different specifications of cutting tools and tool order are set for the rough and finish milling of the frame surface area, the cutting fluid flow rate is set, and the process time is recorded.

[0103] The first time a 40mm diameter end mill with a root tooth radius of 0.8mm was used, the AP axial cutter depth was 4mm, the AE radial cutter depth was 32mm, the spindle speed S was 6000 rpm, the feed rate F was 4000mm / min, the cutting fluid flow rate was 30L / min, and the working time t was 9 hours.

[0104] The second operation used a 20mm diameter end mill with a 3mm root tooth radius, an AP axial cutter depth of 0.15mm, an AE radial cutter depth of 0.5mm, a spindle speed S of 5500 rpm, a feed rate F of 4000mm / min, and a cutting fluid flow rate of 30L / min; the operating time was t10 hours.

[0105] The third time, a 16mm diameter end mill with a 4mm bottom tooth radius was used. The AP axial cutter depth was 0.5mm, the AE radial cutter depth was 10mm, the spindle speed S was 3500 rpm, the feed rate F was 1500mm / min, and the cutting fluid flow rate was 20L / min. The working time t was 11 hours.

[0106] The fourth time, a 20mm diameter end mill with a bottom tooth radius of 3mm was used. The axial cutter depth of AP was 0.15mm, the radial cutter depth of AE was 0.5mm, the spindle speed of S was 5500 rpm, the feed rate of F was 4000mm / min, and the cutting fluid flow rate was 20L / min. The working time was t12 hours.

[0107] The fifth operation used a 6mm diameter end mill with a root tooth radius of 3, an axial cutter depth of 0.15mm for AP, a radial cutter depth of 0.5mm for AE, a spindle speed of 5500 rpm, a feed rate of 3000mm / min, and a cutting fluid flow rate of 30L / min; the working time was t13 hours.

[0108] The sixth operation used a 12mm diameter end mill with a bottom tooth radius of 4, an axial cutter depth of 0.15mm for AP, a radial cutter depth of 0.5mm for AE, a spindle speed of 5500 rpm, a feed rate of 3000mm / min, and a cutting fluid flow rate of 30L / min; the operating time was 14 hours.

[0109] The seventh operation used a 16mm diameter end mill with a bottom tooth radius of 0mm, an axial cutter depth of 20mm for AP, a radial cutter depth of 0.5mm for AE, a spindle speed of 3500 rpm, a feed rate of 1200mm / min, and a cutting fluid flow rate of 10L / min; the operating time was 15 hours.

[0110] The eighth time, a boring tool was used, with AP axial cutter depth of 0.5mm, AE radial cutter depth of 0.5mm, spindle speed S of 200 rpm, feed rate F of 20mm / min, and cutting fluid flow rate of 10L / min; working time t of 16 hours.

[0111] The total milling time for step 3 is 110 hours, i.e., t9+t10+t11+t12+t13+t14+t15+t16=110 hours.

[0112] Step 3: Total cutting fluid consumption L equals

[0113] t9*60min*30L / min+t10*60min*30L / min+t11*60min*20L / min+t12*60min*20L / min+t13*60min*30L / min+t14*60min*30L / min+t15*60min*10L / min+t16*60min*10L / min

[0114] Furthermore, in step 3 of S42, step 2 is verified at the start of the process. The verification is based on the dimensions of the processed parts. If the verification result meets the requirements of the parts, step 2 is executed. If the result does not meet the requirements of the parts, the tool and tool order used in step 2 are changed, and the verification result is verified again to meet the requirements of the parts. Step 2 is executed again until the verification result meets the processing dimension requirements.

[0115] The present invention has the following beneficial effects:

[0116] 1) The processing method for this frame-shaped part involves the worker selecting a positioning datum to ensure the accuracy of the positioning datum.

[0117] 2) The bosses of the present invention are joined together by a rib lap splicing method according to the requirements of the parts, which reduces the working time and the risk of personnel injury.

[0118] 3) Set up the process route for the CNC milling area to enable the use of different specifications of tools in different areas, and formulate different usage sequences to achieve fine machining, minimize tool damage, and control the amount of cutting fluid used according to the progress of various CNC milling processes.

[0119] 4) The component processing method of the present invention enhances the actual operational performance of the overall process and improves the effect that the processing cost of existing frame-shaped parts cannot be effectively controlled during the processing.

[0120] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for machining a frame-shaped part, characterized in that: Includes the following steps: S1: Initial selection of the positioning datum for frame-type parts; The part in S1 has a large smooth surface, and the web is only 1.2 millimeters thick. The part is opened up over a large area, and the ribs are symmetrically distributed with a large span. There are only two ribs in the Y direction. Therefore, in order to better ensure its machinability, the large smooth surface is selected as the Z-direction reference during machining, and the X and Y directions are positioned using the classic two-pin positioning. S2: Re-establish the positioning benchmark before commencing work; All the edges of the parts in S2 need to be drilled and countersunk. The large smooth surface is set as the Z-direction reference, and the X and Y directions use the holes of 2-12.5 (+0.016 / +0.033) mm on the parts as references. S3: Determine the overlap distance of the bosses on frame-type components; The overlap distance between the frame-shaped component and the boss in S3 is 0.2mm. By using the rib overlap method, under the condition of meeting the processing and clamping requirements, after finishing, the boss is removed and only 0.2mm is connected to the part. When removing the boss, the edge trimmer can be used for chamfering. S4: Set the process route according to the machining dimensions of the frame-type parts; S41: Fitter operation; S42: CNC milling operation; S42 further includes the following steps: Step 1: Divide the CNC milling area according to the component structure; Based on the frame-shaped components, the CNC milling area is divided into three areas: the CNC milling area for machining positioning holes and pin holes, the rough and finish milling area for large smooth surfaces, and the rough and finish milling area for frame surfaces; the rough and finish milling area for large smooth surfaces is fixed using a special vacuum clamp. Step 2: Set different specifications of cutting tools and tool order according to the divided CNC milling area, set the cutting fluid flow rate, and record the process time. The rough and finish milling of the large smooth surface area involves setting different specifications of cutting tools and tool order, setting the cutting fluid flow rate, and recording the process time; a special vacuum clamp is used to fix the thin-walled material to ensure its qualification. The first time a 20mm diameter end mill with a bottom tooth radius of 0mm was used, the AP axial cutter depth was 4mm, the AE radial cutter depth was 20mm, the spindle speed S was 5500 rpm, the feed rate F was 4000mm / min, the cutting fluid flow rate was 30L / min, and the working time t was 6 hours. The second operation used a 20mm diameter end mill with a 1mm root tooth radius, an axial cutter depth of 0.15mm for AP, a radial cutter depth of 0.5mm for AE, a spindle speed of 5500 rpm, a feed rate of 4000mm / min, and a cutting fluid flow rate of 30L / min; the operating time was 7 hours. The third operation used an 8mm diameter end mill with a 1mm bottom tooth radius, an AP axial cutter depth of 0.15mm, an AE radial cutter depth of 0.5mm, a spindle speed S of 5500 rpm, a feed rate F of 3000mm / min, and a cutting fluid flow rate of 30L / min; the operating time was t8 hours. Step 3 verifies Step 2 upon commencement. If the verification result meets the component requirements, proceed with Step 2. If the result does not meet the component requirements, change the cutting tools and tool order used in Step 2, and verify again until the verification result meets the component requirements. S43: Fitter's alignment; S44: Deburring by fitter; S5: Loosen the fixture and disassemble to obtain the part.

2. The method for processing a frame-shaped part according to claim 1, characterized in that: The milling area for machining positioning holes and pin holes is set with different specifications of cutting tools and tool order, the cutting fluid flow rate is set, and the process time is recorded. The first time a 20mm diameter end mill with a bottom tooth radius of 0mm was used, the AP axial cutter depth was 4mm, the AE radial cutter depth was 20mm, the spindle speed S was 5500 rpm, the feed rate F was 4000mm / min, the cutting fluid flow rate was 30L / min, and the working time was t1 hour. The second operation used a 120mm diameter end mill with a bottom tooth radius of 0mm, an axial cutter depth of 80mm (AP), a radial cutter depth of 1mm (AE), a spindle speed of 3000 rpm (S), a feed rate of 1500mm / min (F), and a cutting fluid flow rate of 10L / min; the operation time was t2 hours. The third time, a center drill was used, with a radial cutter depth of 0.5 mm, a spindle speed of 2000 rpm, a feed rate of 100 mm / min, and a cutting fluid flow rate of 10 L / min; the working time was t3 hours. The fourth time, a 13mm diameter drill bit was used, the spindle speed S was 1000 rpm, the feed F was 100mm / min, and the cutting fluid flow rate was 10L / min; the working time t was 4 hours. The fifth time, a 12mm diameter end mill with a bottom tooth R of 0 was used. The spindle speed S was 2000 rpm, the feed F was 200mm / min, and the cutting fluid flow rate was 10L / min. The working time was t5 hours.

3. The method for processing a frame-shaped part according to claim 1, characterized in that: The rough and finish milling frame area is equipped with different specifications of cutting tools and tool order, the cutting fluid flow rate is set, and the process usage time is recorded. The first time a 40mm diameter end mill with a root tooth radius of 0.8mm was used, the AP axial cutter depth was 4mm, the AE radial cutter depth was 32mm, the spindle speed S was 6000 rpm, the feed rate F was 4000mm / min, the cutting fluid flow rate was 30L / min, and the working time t was 9 hours. The second operation used a 20mm diameter end mill with a 3mm root tooth radius, an AP axial cutter depth of 0.15mm, an AE radial cutter depth of 0.5mm, a spindle speed S of 5500 rpm, a feed rate F of 4000mm / min, and a cutting fluid flow rate of 30L / min; the operating time was t10 hours. The third time, a 16mm diameter end mill with a 4mm bottom tooth radius was used. The AP axial cutter depth was 0.5mm, the AE radial cutter depth was 10mm, the spindle speed S was 3500 rpm, the feed rate F was 1500mm / min, and the cutting fluid flow rate was 20L / min. The working time t was 11 hours. The fourth time, a 20mm diameter end mill with a bottom tooth radius of 3mm was used. The axial cutter depth of AP was 0.15mm, the radial cutter depth of AE was 0.5mm, the spindle speed of S was 5500 rpm, the feed rate of F was 4000mm / min, and the cutting fluid flow rate was 20L / min. The working time was t12 hours. The fifth operation used a 6mm diameter end mill with a root tooth radius of 3, an axial cutter depth of 0.15mm for AP, a radial cutter depth of 0.5mm for AE, a spindle speed of 5500 rpm, a feed rate of 3000mm / min, and a cutting fluid flow rate of 30L / min; the working time was t13 hours. The sixth operation used a 12mm diameter end mill with a bottom tooth radius of 4, an axial cutter depth of 0.15mm for AP, a radial cutter depth of 0.5mm for AE, a spindle speed of 5500 rpm, a feed rate of 3000mm / min, and a cutting fluid flow rate of 30L / min; the operating time was 14 hours. The seventh operation used a 16mm diameter end mill with a bottom tooth radius of 0mm, an axial cutter depth of 20mm for AP, a radial cutter depth of 0.5mm for AE, a spindle speed of 3500 rpm, a feed rate of 1200mm / min, and a cutting fluid flow rate of 10L / min; the operating time was 15 hours. The eighth time, a boring tool was used, with AP axial cutter depth of 0.5mm, AE radial cutter depth of 0.5mm, spindle speed S of 200 rpm, feed F of 20mm / min, and cutting fluid flow rate of 10L / min; working time t of 16 hours.

Images