A processing method for adjusting the wall thickness uniformity of thin-walled hollow parts

Abstract

This invention relates to the field of machining technology for thin-walled hollow parts, specifically to a machining method for adjusting the uniformity of wall thickness in thin-walled hollow parts. The method includes rough milling the outer contour of the thin-walled hollow part, leaving a allowance sufficient to adjust the wall thickness deviation and coordinate system position during finish milling; accurately detecting the wall thickness dimensions at each point after rough milling; calculating the adjustment values ​​of the process datum at both ends and the coordinate system offset based on the wall thickness values ​​using a calculation software; and finish milling the outer contour of the thin-walled hollow part. This invention improves the wall thickness quality and machining efficiency of thin-walled hollow parts by adjusting the milling allowance and developing an algorithm program. The operator inputs the wall thickness detection results into a small program, which automatically calculates the results. The operator can then directly adjust the coordinate system based on the results.

Description

Technical Field

[0001] This invention relates to the field of machining technology for thin-walled hollow parts, specifically to a machining method for adjusting the uniformity of wall thickness in thin-walled hollow parts. Background Technology

[0002] Thin-walled hollow parts are a new type of structural component researched in China in recent years, and are currently in the research and exploration stage. The uneven wall thickness of thin-walled hollow parts is the most difficult technical problem encountered in their machining. To ensure the uniformity of wall thickness, after rough machining and before finish machining, inspectors need to measure the wall thickness variation values, manually calculate the deviation between the measured and theoretical wall thickness values, analyze the general trend of the wall thickness deviation values ​​at various points, and manually determine how to adjust the coordinate system and process references. The entire calculation process is cumbersome, and manual calculation carries a significant risk of error and inaccuracies, resulting in unsatisfactory machining efficiency and results. Summary of the Invention

[0003] To address the problems existing in the prior art, this invention provides a processing method for adjusting the wall thickness uniformity of thin-walled hollow parts. The method clearly defines the process from wall thickness detection, software calculation of wall thickness deviation, and coordinate system adjustment to ensure the uniformity of the wall thickness of the thin-walled hollow parts.

[0004] The technical solution of this invention is:

[0005] A processing method for adjusting the wall thickness uniformity of a thin-walled hollow component includes the following steps:

[0006] Step 1: Rough mill the outer contour of the thin-walled hollow part, leaving enough allowance to adjust the wall thickness deviation and coordinate system position when finishing milling the outer contour of the thin-walled hollow part;

[0007] Step 2: Accurately measure the wall thickness at each point after rough milling:

[0008] Step 2.1: Compile a CNC program to drive the marker pen to draw points. The X, Y, and Z values ​​of the points to be measured are programmed into the CNC program. The CNC program is as follows:

[0009] N10 G00 G17 G90 G54

[0010] N15 T1

[0011] N20 X0.0 Y0.0 Z100 A0.0 B0.0 C180.

[0012] N25 G01 X50 Y30 Z10 F5000

[0013] N30 Y-30

[0014] N35 X80

[0015] N40 Y-30

[0016] N35 X110

[0017] N40 Y30

[0018] N35 X140

[0019] N40 Y-30

[0020] N20 Z100

[0021] N20A0.0 B0.0 C0.0

[0022] N25 G01 X50 Y30 Z10 F5000

[0023] N30 Y-30

[0024] N35 X80

[0025] N40 Y-30

[0026] N35 X110

[0027] N40 Y30

[0028] N35 X140

[0029] N40 Y-30

[0030] N20 Z100

[0031] N47 M30

[0032] Step 2.2: Install the marker on the machine tool holder, start the prepared CNC program, and the marker will draw precise points according to the point trajectory in the CNC program;

[0033] Step 2.3: Use a roughness wall thickness instrument to measure the wall thickness at each point marked in Step 2.2.

[0034] Step 3: Precision mill the outer contour of the thin-walled hollow part:

[0035] Step 3.1: Calculate the adjustment values ​​of the process datum at both ends and the coordinate system offset using the wall thickness calculation software, and enter the calculation process program as follows:

[0036]

[0037]

[0038] Step 3.2: Adjust the pad value of the thin-walled hollow part according to the process reference adjustment values ​​calculated in Step 3.1:

[0039] Step 3.3: Substitute the coordinate system offset calculated in Step 3.1 into the precision milling CNC program to perform precision milling operation;

[0040] Step 4: Repeat steps 2 and 3 until the required wall thickness is measured, then stop processing.

[0041] The preferred embodiment of the above-mentioned processing method for adjusting the wall thickness uniformity of a thin-walled hollow part is that the allowance in step 1 is 0.3mm.

[0042] The preferred embodiment of the above-mentioned processing method for adjusting the wall thickness uniformity of a thin-walled hollow part is as follows: The formula for calculating the adjustment values ​​of the process references at both ends using the calculation software in step 3.1 is:

[0043] in,

[0044] dz: Height of the large end pad;

[0045] m: The total number of points corresponding to the pelvic and dorsal sides;

[0046] P n : Wall thickness at the side of the basin;

[0047] b n : Backside wall thickness value;

[0048] P n and b n These are the points corresponding to the pelvic and dorsal sides.

[0049] The calculation procedure is as follows:

[0050] Sub calculates the offset()

[0051] Sheets(Sheets.Count).Activate

[0052] 'Reset to zero'

[0053] Range("b8") = 0' Offset

[0054] Dim w, pad value, ratio, result, change

[0055] pad value = 0

[0056] Ratio = 10

[0057] 'Calculate offset'

[0058] Dim d, offset

[0059] d=(Range("J14")-Range("J15")+Range("J17")-Range("J18")) / 2

[0060] Offset = Round(d,2)

[0061] Range("B8") = Range("B8") + offset

[0062] End Sub

[0063] The preferred embodiment of the above-mentioned processing method for adjusting the wall thickness uniformity of thin-walled hollow parts is as follows: Step 3.1 The formula for calculating the coordinate system offset by the calculation software is:

[0064] in,

[0065] dm: Current offset value;

[0066] d0: Original offset value;

[0067] m: The total number of points corresponding to the pelvic and dorsal sides;

[0068] P n : Wall thickness at the side of the basin;

[0069] b n : Wall thickness at the back side point;

[0070] P n and b n These are the points corresponding to the pelvic and dorsal sides.

[0071] The calculation procedure is as follows:

[0072]

[0073] Advantages and beneficial effects of the present invention:

[0074] This invention clarifies a method for adjusting wall thickness uniformity, eliminating the need for manual calculation of wall thickness and reducing human intervention. By adjusting the milling allowance and developing an algorithm program, the operator inputs the wall thickness detection results into a mini-program, which automatically calculates the detection results. The operator can then directly adjust the coordinate system based on the results, thereby improving the wall thickness quality and processing efficiency of thin-walled hollow parts. Attached Figure Description

[0075] Figure 1 This is the process flow of the processing method for adjusting the wall thickness uniformity of thin-walled hollow parts according to the present invention. Detailed Implementation

[0076] The specific embodiments of the present invention will be described in further detail below. These embodiments are for illustrative purposes only and should not be used to limit the scope of the present invention.

[0077] Example

[0078] A processing method for adjusting the wall thickness uniformity of a thin-walled hollow component includes the following steps:

[0079] Step 1: Rough mill the outer contour of the thin-walled hollow part, leaving a 0.3mm allowance to allow for adjusting the wall thickness deviation and coordinate system position when finishing milling the outer contour of the thin-walled hollow part;

[0080] Step 2: Accurately measure the wall thickness at each point after rough milling:

[0081] Step 2.1: Compile a CNC program to drive the marker pen to draw points. The X, Y, and Z values ​​of the points to be measured are incorporated into the CNC program. The CNC program is as follows:

[0082] N10 G00 G17 G90 G54

[0083] N15 T1

[0084] N20 X0.0 Y0.0 Z100 A0.0 B0.0 C180.

[0085] N25 G01 X50 Y30 Z10 F5000

[0086] N30 Y-30

[0087] N35 X80

[0088] N40 Y-30

[0089] N35 X110

[0090] N40 Y30

[0091] N35 X140

[0092] N40 Y-30

[0093] N20 Z100

[0094] N20A0.0 B0.0 C0.0

[0095] N25 G01 X50 Y30 Z10 F5000

[0096] N30 Y-30

[0097] N35 X80

[0098] N40 Y-30

[0099] N35 X110

[0100] N40 Y30

[0101] N35 X140

[0102] N40 Y-30

[0103] N20 Z100

[0104] N47 M30

[0105] Step 2.2: Install the marker on the machine tool holder, start the prepared CNC program, and the marker will draw precise points according to the point trajectory in the CNC program;

[0106] Step 2.3: Using a roughness and wall thickness gauge, measure the wall thickness at each point marked in Step 2.2. The wall thickness values ​​are shown in Table 1.

[0107] Table 1. Wall thickness values ​​at various points for part No. 1

[0108] Part No. 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Leaf Pot 1.52 1.52 1.52 1.52 1.52 1.55 1.56 1.56 1.57 1.58 1.58 1.57 1.56 1.56 leaf back 1.38 1.41 1.43 1.44 1.45 1.46 1.46 1.46 1.49 1.50 1.49 1.49 1.49 1.52

[0109] Step 3: Precision mill the outer contour of the thin-walled hollow part:

[0110] Step 3.1: Calculate the adjustment values ​​of the process datum at both ends and the coordinate system offset using the wall thickness calculation software.

[0111] Initial measurements: dm = +0.07, dz = 0.15. All subsequent calculations will be rounded to two decimal places.

[0112] In the following computer calculation process,

[0113] dm: Current offset value;

[0114] dz: Height of the large end pad;

[0115] d0: Original offset value;

[0116] m: The total number of points corresponding to the pelvic and dorsal sides;

[0117] P n : Wall thickness at the side of the basin;

[0118] b n : Backside wall thickness value;

[0119] P n and b n These are the points corresponding to the pelvic and dorsal sides;

[0120] The calculation process for coordinate system offset by the calculation software is as follows:

[0121] Given d0 = 0.07, m = 14 + 14 = 28,

[0122] Therefore

[0123]

[0124] The calculation process for the adjustment values ​​of the process references at both ends by the calculation software is as follows:

[0125]

[0126] Step 3.2: Based on the process reference adjustment value calculated in Step 3.1, adjust the shim value at the small end of the thin-walled hollow part to 0.17mm by -0.17.

[0127] Step 3.3: Substitute the coordinate system offset of 0.06 calculated in Step 3.1 into the finish milling CNC program for finish milling operation.

[0128] Step 4: Repeat steps 2 and 3 until the required wall thickness is measured, then stop processing.

Claims

1. A processing method for adjusting the wall thickness uniformity of a thin-walled hollow part, characterized in that, Includes the following steps: Step 1: Rough mill the outer contour of the thin-walled hollow part, leaving enough allowance to adjust the wall thickness deviation and coordinate system position when finishing milling the outer contour of the thin-walled hollow part; Step 2: Accurately measure the wall thickness at each point after rough milling: Step 2.1: Compile a CNC program to drive the marker pen to draw points. Incorporate the X, Y, and Z values ​​of the points to be measured into the CNC program. Step 2.2: Install the marker on the machine tool holder, start the prepared CNC program, and the marker will draw precise points according to the point trajectory in the CNC program; Step 2.3: Use a roughness wall thickness instrument to measure the wall thickness at each point marked in Step 2.

2. Step 3: Precision mill the outer contour of the thin-walled hollow part: Step 3.1: Calculate the adjustment values ​​of the process datum at both ends and the coordinate system offset using the design calculation software based on the wall thickness values; The formula used by the calculation software to calculate the adjustment values ​​of the process references at both ends is: ,in, dz: Height of the large end pad; m: The total number of points corresponding to the pelvic and dorsal sides; P n : Wall thickness at the side of the basin; b n : Backside wall thickness value; P n and b n These are the points corresponding to the pelvic and dorsal sides; The formula for calculating the coordinate system offset is: ,in, dm: Current offset value; d0: Original offset value; m: The total number of points corresponding to the pelvic and dorsal sides; P n : Wall thickness at the side of the basin; b n : Backside wall thickness value; P n and b n These are the points corresponding to the pelvic and dorsal sides; Step 3.2: Adjust the pad value of the thin-walled hollow part according to the process reference adjustment values ​​calculated in Step 3.1: Step 3.3: Substitute the coordinate system offset calculated in Step 3.1 into the precision milling CNC program to perform precision milling operation; Step 4: Repeat steps 2 and 3 until the required wall thickness is measured, then stop processing.

2. The processing method for adjusting the wall thickness uniformity of a thin-walled hollow part according to claim 1, characterized in that, The allowance mentioned in step 1 is 0.3 mm.

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