Here is a way to record each body of construction welded in part, modifying it perhaps possible to save in step.
'**********************
'Copyright(C) 2025 Xarial Pty Limited
'Reference: https://www.codestack.net/solidworks-api/geometry/insert-bodies-to-part/
'License: https://www.codestack.net/license/
'**********************
Const CUT_LIST_PRPS_TRANSFER As Long = swCutListTransferOptions_e.swCutListTransferOptions_FileProperties
Const OUT_DIR As String = ""
Dim swApp As SldWorks.SldWorks
Sub main()
Set swApp = Application.SldWorks
Dim swPart As SldWorks.PartDoc
Set swPart = swApp.ActiveDoc
Dim vBodies As Variant
vBodies = GetSelectedBodies(swPart.SelectionManager)
If IsEmpty(vBodies) Then
vBodies = swPart.GetBodies2(swBodyType_e.swSolidBody, True)
End If
Dim i As Integer
For i = 0 To UBound(vBodies)
Dim swBody As SldWorks.Body2
Set swBody = vBodies(i)
If False <> swBody.Select2(False, Nothing) Then
Dim outFilePath As String
outFilePath = GetOutFilePath(swPart, swBody, OUT_DIR)
Dim errs As Long
Dim warns As Long
If False <> swPart.SaveToFile3(outFilePath, swSaveAsOptions_e.swSaveAsOptions_Silent, CUT_LIST_PRPS_TRANSFER, False, "", errs, warns) Then
swApp.CloseDoc outFilePath
Else
Err.Raise vbError, "", "Failed to save body " & swBody.Name & " to file " & outFilePath & ". Error code: " & errs
End If
Else
Err.Raise vbError, "", "Failed to select body " & swBody.Name
End If
Next
End Sub
Function GetSelectedBodies(selMgr As SldWorks.SelectionMgr) As Variant
Dim isInit As Boolean
isInit = False
Dim swBodies() As SldWorks.Body2
Dim i As Integer
For i = 1 To selMgr.GetSelectedObjectCount2(-1)
Dim swBody As SldWorks.Body2
Set swBody = GetSelectedObjectBody(selMgr, i)
If Not swBody Is Nothing Then
If Not isInit Then
ReDim swBodies(0)
Set swBodies(0) = swBody
isInit = True
Else
If Not Contains(swBodies, swBody) Then
ReDim Preserve swBodies(UBound(swBodies) + 1)
Set swBodies(UBound(swBodies)) = swBody
End If
End If
End If
Next
If isInit Then
GetSelectedBodies = swBodies
Else
GetSelectedBodies = Empty
End If
End Function
Function GetSelectedObjectBody(selMgr As SldWorks.SelectionMgr, index As Integer) As SldWorks.Body2
Dim swBody As SldWorks.Body2
Dim selObj As Object
Set selObj = selMgr.GetSelectedObject6(index, -1)
If Not selObj Is Nothing Then
If TypeOf selObj Is SldWorks.Body2 Then
Set swBody = selObj
ElseIf TypeOf selObj Is SldWorks.Face2 Then
Dim swFace As SldWorks.Face2
Set swFace = selObj
Set swBody = swFace.GetBody
ElseIf TypeOf selObj Is SldWorks.Edge Then
Dim swEdge As SldWorks.Edge
Set swEdge = selObj
Set swBody = swEdge.GetBody
ElseIf TypeOf selObj Is SldWorks.Vertex Then
Dim swVertex As SldWorks.Vertex
Set swVertex = selObj
Set swBody = swVertex.GetBody
End If
End If
Set GetSelectedObjectBody = swBody
End Function
Function Contains(vArr As Variant, item As Object) As Boolean
Dim i As Integer
For i = 0 To UBound(vArr)
If vArr(i) Is item Then
Contains = True
Exit Function
End If
Next
Contains = False
End Function
Function GetOutFilePath(model As SldWorks.ModelDoc2, body As SldWorks.Body2, outDir As String) As String
If outDir = "" Then
outDir = model.GetPathName()
If outDir = "" Then
Err.Raise vbError, "", "Output directory cannot be composed as file was never saved"
End If
outDir = Left(outDir, InStrRev(outDir, "\") - 1)
End If
If Right(outDir, 1) = "\" Then
outDir = Left(outDir, Len(outDir) - 1)
End If
GetOutFilePath = ReplaceInvalidPathSymbols(outDir & "\" & body.Name & ".sldprt")
End Function
Function ReplaceInvalidPathSymbols(path As String) As String
Const REPLACE_SYMB As String = "_"
Dim res As String
res = Right(path, Len(path) - Len("X:\"))
Dim drive As String
drive = Left(path, Len("X:\"))
Dim invalidSymbols As Variant
invalidSymbols = Array("/", ":", "*", "?", """", "<", ">", "|")
Dim i As Integer
For i = 0 To UBound(invalidSymbols)
Dim invalidSymb As String
invalidSymb = CStr(invalidSymbols(i))
res = Replace(res, invalidSymb, REPLACE_SYMB)
Next
ReplaceInvalidPathSymbols = drive + res
End Function
The link to the page with the code:
No time to go further in the macro but it can be a good base, to test to see if the parts are not duplicated and if the names are suitable.
Then you have to open these parts and export them as a step. Unless it's possible by replacing this line with a step export.
See on this line:
If False <> swPart.SaveToFile3(outFilePath, swSaveAsOptions_e.swSaveAsOptions_Silent, CUT_LIST_PRPS_TRANSFER, False, "", errs, warns) Then
swApp.CloseDoc outFilePath