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kernel-cases: a thread off its hole or shaft size is refused
A modelled thread never changes the size of the hole or shaft it is on (#1018, #2853): one that isn't the thread's size is refused, naming the size to use. The seven cases that expected the hole filled to the tap drill or the shaft turned down to the major diameter (995, 1443, 2152, 2969, 3366, 2369, 2705) now expect that refusal, with its numbers worked out from ISO 68-1 and the message in `refusal`. An opt-in fit option, if it comes, gets cases of its own. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Brennen Herbruck
@@ -1,32 +1,13 @@
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{
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"sources": [
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"tangency-labs/solidcraft#1443",
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"tangency-labs/solidcraft#3060"
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"tangency-labs/solidcraft#3060",
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"tangency-labs/solidcraft#1018",
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"tangency-labs/solidcraft#2853"
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],
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"what": "a modelled M5x0.7 thread in a 5 mm hole (refused: it would cut 0.00 mm of the thread's depth)",
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"what": "a modelled thread on a hole that isn't the thread's size: refused with the size to use, never a silent change of the hole",
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"source": "analytic",
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"method": "ISO 68-1 basic profile: H = P sqrt3/2, basic depth 5H/8. External groove (the space between teeth): a trapezoid P/4 wide at the root radius d/2 - 5H/8, widening by 2 tan30 per unit of radius to 7P/8 at d/2. Internal groove: P/8 wide at the major radius d/2, widening to 3P/4 at the minor radius, cut only where there is material (r >= hole radius). Pappus: volume per turn = 2 pi A rc (A the trapezoid area, rc its centroid radius from the axis); a helical sweep of L/P turns removes exactly (L/P) x that, where each end of the thread is a free end or lies inside material. A 5 mm hole through a D14 x 4.2 disc, drawn at the thread's nominal size, takes a modelled M5x0.7: the hole is first filled to the tap drill (major - pitch = 4.3 mm, rho=2.15), then the groove is cut, the same thread as in a hole drilled at the tap drill. Whole length, both ends free (6 turns): V = pi 7^2 4.2 - pi 2.15^2 4.2 - 6 x V_turn(clipped at rho) = 646.5398 - 60.9925 - 6 x 1.45465 = 576.8194 mm3. The thin lips a tap leaves at each end are below 0.2% of the volume. Tolerance 1%: a modelled thread is a faceted helical solid (radial chord error up to 1% of the pitch on every wall, i.e. a volume deficit of about 4/3 x sag/R).",
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"outcome": "solid",
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"body_count": 1,
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"volume_mm3": 576.8194,
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"tolerance": {
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"rel": 0.01
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},
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"bbox": {
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"min": [
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-7,
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-7,
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0
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],
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"max": [
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7,
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7,
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4.2
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]
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},
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"center_of_mass": [
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0,
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0,
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2.1
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]
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"method": "Decision (#1018, #2853): a modelled thread never changes the size of the hole it is on; one that isn't the thread's size is refused, naming the size to use. A fill-to-tap-drill or turn-down option would be opt-in, off by default (see #3060), and get its own case. The refusal's numbers, from ISO 68-1 (H = P sqrt3/2, basic depth 5H/8): M5x0.7: tap drill = 5 - 0.7 = 4.3 mm; depth 5H/8 = 5/8 x 0.7 x sqrt3/2 = 0.379 mm; the 5 mm hole is at the major diameter, so nothing would be cut. Expected message: \"this 5 mm hole is too wide for a modelled M5x0.7 thread: it would cut 0.00 mm of the thread's 0.38 mm depth; drill 4.3 mm for M5x0.7, or thread this hole M6\".",
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"outcome": "refused",
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"refusal": "this 5 mm hole is too wide for a modelled M5x0.7 thread: it would cut 0.00 mm of the thread's 0.38 mm depth; drill 4.3 mm for M5x0.7, or thread this hole M6"
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}
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@@ -1,31 +1,12 @@
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{
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"sources": [
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"tangency-labs/solidcraft#2152"
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"tangency-labs/solidcraft#2152",
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"tangency-labs/solidcraft#1018",
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"tangency-labs/solidcraft#2853"
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],
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"what": "a modelled M3x0.2 thread in a 3 mm hole (the same refusal as a hole at the nominal size)",
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"what": "a modelled thread on a hole that isn't the thread's size: refused with the size to use, never a silent change of the hole",
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"source": "analytic",
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"method": "ISO 68-1 basic profile: H = P sqrt3/2, basic depth 5H/8. External groove (the space between teeth): a trapezoid P/4 wide at the root radius d/2 - 5H/8, widening by 2 tan30 per unit of radius to 7P/8 at d/2. Internal groove: P/8 wide at the major radius d/2, widening to 3P/4 at the minor radius, cut only where there is material (r >= hole radius). Pappus: volume per turn = 2 pi A rc (A the trapezoid area, rc its centroid radius from the axis); a helical sweep of L/P turns removes exactly (L/P) x that, where each end of the thread is a free end or lies inside material. A 3 mm hole through a D10 x 2 disc, drawn at the thread's nominal size, takes a modelled M3x0.2: the hole is first filled to the tap drill (major - pitch = 2.8 mm, rho=1.4), then the groove is cut, the same thread as in a hole drilled at the tap drill. Whole length, both ends free (10 turns): V = pi 5^2 2 - pi 1.4^2 2 - 10 x V_turn(clipped at rho) = 157.0796 - 12.3150 - 10 x 0.07477 = 144.0169 mm3. The thin lips a tap leaves at each end are below 0.2% of the volume. Tolerance 1%: a modelled thread is a faceted helical solid (radial chord error up to 1% of the pitch on every wall, i.e. a volume deficit of about 4/3 x sag/R).",
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"outcome": "solid",
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"body_count": 1,
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"volume_mm3": 144.0169,
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"tolerance": {
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"rel": 0.01
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},
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"bbox": {
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"min": [
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-5,
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-5,
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0
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],
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"max": [
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5,
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5,
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2
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]
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},
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"center_of_mass": [
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0,
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0,
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1.0
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]
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"method": "Decision (#1018, #2853): a modelled thread never changes the size of the hole it is on; one that isn't the thread's size is refused, naming the size to use. A fill-to-tap-drill or turn-down option would be opt-in, off by default (see #3060), and get its own case. The refusal's numbers, from ISO 68-1 (H = P sqrt3/2, basic depth 5H/8): M3x0.2: tap drill = 3 - 0.2 = 2.8 mm; depth 5H/8 = 5/8 x 0.2 x sqrt3/2 = 0.108 mm; the 3 mm hole is at the major diameter. Expected message: \"this 3 mm hole is too wide for a modelled M3x0.2 thread: it would cut 0.00 mm of the thread's 0.11 mm depth; drill 2.8 mm for M3x0.2, or thread this hole M4\".",
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"outcome": "refused",
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"refusal": "this 3 mm hole is too wide for a modelled M3x0.2 thread: it would cut 0.00 mm of the thread's 0.11 mm depth; drill 2.8 mm for M3x0.2, or thread this hole M4"
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}
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@@ -1,33 +0,0 @@
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{
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"sources": [
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"tangency-labs/solidcraft#2369",
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"tangency-labs/solidcraft#2688",
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"tangency-labs/solidcraft#2853"
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],
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"what": "a modelled M8 thread in a hole narrower than the thread's minor diameter (6.3 mm, and 6 mm in #2688), refused as 'the face is too far from the thread's diameter'",
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"source": "analytic",
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"method": "ISO 68-1 basic profile: H = P sqrt3/2, basic depth 5H/8. External groove (the space between teeth): a trapezoid P/4 wide at the root radius d/2 - 5H/8, widening by 2 tan30 per unit of radius to 7P/8 at d/2. Internal groove: P/8 wide at the major radius d/2, widening to 3P/4 at the minor radius, cut only where there is material (r >= hole radius). Pappus: volume per turn = 2 pi A rc (A the trapezoid area, rc its centroid radius from the axis); a helical sweep of L/P turns removes exactly (L/P) x that, where each end of the thread is a free end or lies inside material. A 6.3 mm hole through a D16 x 5 disc takes a modelled M8 (P=1.25). The hole is narrower than the thread's minor diameter 8 - 2 x 5H/8 = 6.6468 mm (ISO D1 = D - 1.0825 P), so a tap takes the extra material off first: the hole is bored out to the minor diameter (rho=3.3234) and the groove cut from there. Whole length (4 turns): V = pi 8^2 5 - pi rho^2 5 - 4 x V_turn(clipped at rho) = 1005.3096 - 173.4961 - 4 x 8.32555 = 798.5114 mm3. Tolerance 1%: a modelled thread is a faceted helical solid (radial chord error up to 1% of the pitch on every wall, i.e. a volume deficit of about 4/3 x sag/R).",
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"outcome": "solid",
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"body_count": 1,
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"volume_mm3": 798.5114,
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"center_of_mass": [
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0,
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0,
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2.5
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],
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"tolerance": {
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"rel": 0.01
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},
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"bbox": {
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"min": [
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-8,
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-8,
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0
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],
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"max": [
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8,
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8,
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5
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]
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}
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}
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@@ -0,0 +1,13 @@
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{
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"sources": [
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"tangency-labs/solidcraft#2369",
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"tangency-labs/solidcraft#2688",
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"tangency-labs/solidcraft#2853",
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"tangency-labs/solidcraft#1018"
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],
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"what": "a modelled thread on a hole that isn't the thread's size: refused with the size to use, never a silent change of the hole",
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"source": "analytic",
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"method": "Decision (#1018, #2853): a modelled thread never changes the size of the hole it is on; one that isn't the thread's size is refused, naming the size to use. A fill-to-tap-drill or turn-down option would be opt-in, off by default (see #3060), and get its own case. The refusal's numbers, from ISO 68-1 (H = P sqrt3/2, basic depth 5H/8): M8 (P 1.25): tap drill = 8 - 1.25 = 6.75 mm; basic minor diameter D1 = 8 - 2 x 5H/8 = 8 - 1.353 = 6.647 mm; a 6.3 mm hole is below the minor diameter, so the thread's teeth would fill part of the hole. Expected message: \"this 6.3 mm hole is too narrow for a modelled M8 thread (its teeth would fill the hole); drill 6.75 mm for M8\".",
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"outcome": "refused",
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"refusal": "this 6.3 mm hole is too narrow for a modelled M8 thread (its teeth would fill the hole); drill 6.75 mm for M8"
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}
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-26
@@ -1,26 +0,0 @@
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{
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"sources": [
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"tangency-labs/solidcraft#2705"
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],
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"what": "a modelled M14 thread on a 14.6 mm boss, slightly thicker than the thread (refused: the face is too far from the thread's diameter)",
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"source": "analytic",
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"method": "ISO 68-1 basic profile: H = P sqrt3/2, basic depth 5H/8. External groove (the space between teeth): a trapezoid P/4 wide at the root radius d/2 - 5H/8, widening by 2 tan30 per unit of radius to 7P/8 at d/2. Internal groove: P/8 wide at the major radius d/2, widening to 3P/4 at the minor radius, cut only where there is material (r >= hole radius). Pappus: volume per turn = 2 pi A rc (A the trapezoid area, rc its centroid radius from the axis); a helical sweep of L/P turns removes exactly (L/P) x that, where each end of the thread is a free end or lies inside material. A 14.6 mm boss (R=7.3, 15 tall) on a 20x20x4 plate takes a modelled M14 (P=2) over 10 mm from its free top end. The boss is thicker than the major diameter, so a die turns it down to 14 mm over the threaded length first (ring pi (7.3^2 - 7^2) 10 = 134.7743) and the groove is cut from there (5 turns, 50.18900 each). V = 1600 + pi 7.3^2 15 - 134.7743 - 5 x 50.18900 = 3725.5127 mm3. The groove's last end may nick the unturned boss by well under 0.2 mm3. Tolerance 1%: a modelled thread is a faceted helical solid (radial chord error up to 1% of the pitch on every wall, i.e. a volume deficit of about 4/3 x sag/R).",
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"outcome": "solid",
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"body_count": 1,
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"volume_mm3": 3725.5127,
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"tolerance": {
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"rel": 0.01
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},
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"bbox": {
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"min": [
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-10,
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-10,
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0
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],
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"max": [
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10,
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10,
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19
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]
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}
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}
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@@ -0,0 +1,12 @@
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{
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"sources": [
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"tangency-labs/solidcraft#2705",
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"tangency-labs/solidcraft#1018",
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"tangency-labs/solidcraft#2853"
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],
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"what": "a modelled thread on a shaft that isn't the thread's size: refused with the size to use, never a silent change of the shaft",
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"source": "analytic",
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"method": "Decision (#1018, #2853): a modelled thread never changes the size of the shaft it is on; one that isn't the thread's size is refused, naming the size to use. A fill-to-tap-drill or turn-down option would be opt-in, off by default (see #3060), and get its own case. The refusal's numbers, from ISO 68-1 (H = P sqrt3/2, basic depth 5H/8): M14: an external thread's major diameter is 14 mm; a 14.6 mm shaft is above it, so the thread would have to turn the shaft down. Expected message: \"this 14.6 mm shaft is too thick for a modelled M14 thread; make the shaft 14 mm for M14\".",
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"outcome": "refused",
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"refusal": "this 14.6 mm shaft is too thick for a modelled M14 thread; make the shaft 14 mm for M14"
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}
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@@ -1,31 +1,12 @@
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{
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"sources": [
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"tangency-labs/solidcraft#2969"
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"tangency-labs/solidcraft#2969",
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"tangency-labs/solidcraft#1018",
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"tangency-labs/solidcraft#2853"
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],
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"what": "a modelled M48x0.75 internal thread in a 48 mm hole (a workflow Fusion accepts)",
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"what": "a modelled thread on a hole that isn't the thread's size: refused with the size to use, never a silent change of the hole",
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"source": "analytic",
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"method": "ISO 68-1 basic profile: H = P sqrt3/2, basic depth 5H/8. External groove (the space between teeth): a trapezoid P/4 wide at the root radius d/2 - 5H/8, widening by 2 tan30 per unit of radius to 7P/8 at d/2. Internal groove: P/8 wide at the major radius d/2, widening to 3P/4 at the minor radius, cut only where there is material (r >= hole radius). Pappus: volume per turn = 2 pi A rc (A the trapezoid area, rc its centroid radius from the axis); a helical sweep of L/P turns removes exactly (L/P) x that, where each end of the thread is a free end or lies inside material. A 48 mm hole through a D54 x 3 disc, drawn at the thread's nominal size, takes a modelled M48x0.75: the hole is first filled to the tap drill (major - pitch = 47.25 mm, rho=23.625), then the groove is cut, the same thread as in a hole drilled at the tap drill. Whole length, both ends free (4 turns): V = pi 27^2 3 - pi 23.625^2 3 - 4 x V_turn(clipped at rho) = 6870.6631 - 5260.3515 - 4 x 17.37563 = 1540.8091 mm3. The thin lips a tap leaves at each end are below 0.2% of the volume. Tolerance 1%: a modelled thread is a faceted helical solid (radial chord error up to 1% of the pitch on every wall, i.e. a volume deficit of about 4/3 x sag/R).",
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"outcome": "solid",
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"body_count": 1,
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"volume_mm3": 1540.8091,
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"tolerance": {
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"rel": 0.01
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},
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"bbox": {
|
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"min": [
|
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-27,
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-27,
|
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0
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||||
],
|
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"max": [
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27,
|
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27,
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3
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||||
]
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},
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"center_of_mass": [
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0,
|
||||
0,
|
||||
1.5
|
||||
]
|
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"method": "Decision (#1018, #2853): a modelled thread never changes the size of the hole it is on; one that isn't the thread's size is refused, naming the size to use. A fill-to-tap-drill or turn-down option would be opt-in, off by default (see #3060), and get its own case. The refusal's numbers, from ISO 68-1 (H = P sqrt3/2, basic depth 5H/8): M48x0.75: tap drill = 48 - 0.75 = 47.25 mm; depth 5H/8 = 5/8 x 0.75 x sqrt3/2 = 0.406 mm; the 48 mm hole is at the major diameter. Expected message: \"this 48 mm hole is too wide for a modelled M48x0.75 thread: it would cut 0.00 mm of the thread's 0.41 mm depth; drill 47.25 mm for M48x0.75, or thread this hole M56\".",
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"outcome": "refused",
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"refusal": "this 48 mm hole is too wide for a modelled M48x0.75 thread: it would cut 0.00 mm of the thread's 0.41 mm depth; drill 47.25 mm for M48x0.75, or thread this hole M56"
|
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}
|
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|
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@@ -1,32 +1,13 @@
|
||||
{
|
||||
"sources": [
|
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"tangency-labs/solidcraft#3366",
|
||||
"tangency-labs/solidcraft#3367"
|
||||
"tangency-labs/solidcraft#3367",
|
||||
"tangency-labs/solidcraft#1018",
|
||||
"tangency-labs/solidcraft#2853"
|
||||
],
|
||||
"what": "a modelled M20 internal thread in a 20 mm hole, made after the 20 mm cylinder's own thread",
|
||||
"what": "a modelled thread on a hole that isn't the thread's size: refused with the size to use, never a silent change of the hole",
|
||||
"source": "analytic",
|
||||
"method": "ISO 68-1 basic profile: H = P sqrt3/2, basic depth 5H/8. External groove (the space between teeth): a trapezoid P/4 wide at the root radius d/2 - 5H/8, widening by 2 tan30 per unit of radius to 7P/8 at d/2. Internal groove: P/8 wide at the major radius d/2, widening to 3P/4 at the minor radius, cut only where there is material (r >= hole radius). Pappus: volume per turn = 2 pi A rc (A the trapezoid area, rc its centroid radius from the axis); a helical sweep of L/P turns removes exactly (L/P) x that, where each end of the thread is a free end or lies inside material. A 20 mm hole through a D48 x 10 disc, drawn at the thread's nominal size, takes a modelled M20: the hole is first filled to the tap drill (major - pitch = 17.5 mm, rho=8.75), then the groove is cut, the same thread as in a hole drilled at the tap drill. Whole length, both ends free (4 turns): V = pi 24^2 10 - pi 8.75^2 10 - 4 x V_turn(clipped at rho) = 18095.5737 - 2405.2819 - 4 x 74.96751 = 15390.4218 mm3. The thin lips a tap leaves at each end are below 0.2% of the volume. Tolerance 1%: a modelled thread is a faceted helical solid (radial chord error up to 1% of the pitch on every wall, i.e. a volume deficit of about 4/3 x sag/R).",
|
||||
"outcome": "solid",
|
||||
"body_count": 1,
|
||||
"volume_mm3": 15390.4218,
|
||||
"tolerance": {
|
||||
"rel": 0.01
|
||||
},
|
||||
"bbox": {
|
||||
"min": [
|
||||
-24,
|
||||
-24,
|
||||
0
|
||||
],
|
||||
"max": [
|
||||
24,
|
||||
24,
|
||||
10
|
||||
]
|
||||
},
|
||||
"center_of_mass": [
|
||||
0,
|
||||
0,
|
||||
5.0
|
||||
]
|
||||
"method": "Decision (#1018, #2853): a modelled thread never changes the size of the hole it is on; one that isn't the thread's size is refused, naming the size to use. A fill-to-tap-drill or turn-down option would be opt-in, off by default (see #3060), and get its own case. The refusal's numbers, from ISO 68-1 (H = P sqrt3/2, basic depth 5H/8): M20 (P 2.5): tap drill = 20 - 2.5 = 17.5 mm; depth 5H/8 = 5/8 x 2.5 x sqrt3/2 = 1.353 mm; the 20 mm hole is at the major diameter. Expected message: \"this 20 mm hole is too wide for a modelled M20 thread: it would cut 0.00 mm of the thread's 1.35 mm depth; drill 17.5 mm for M20, or thread this hole M22\".",
|
||||
"outcome": "refused",
|
||||
"refusal": "this 20 mm hole is too wide for a modelled M20 thread: it would cut 0.00 mm of the thread's 1.35 mm depth; drill 17.5 mm for M20, or thread this hole M22"
|
||||
}
|
||||
|
||||
@@ -1,32 +1,12 @@
|
||||
{
|
||||
"sources": [
|
||||
"tangency-labs/solidcraft#995",
|
||||
"tangency-labs/solidcraft#1018"
|
||||
"tangency-labs/solidcraft#1018",
|
||||
"tangency-labs/solidcraft#2853"
|
||||
],
|
||||
"what": "a modelled M5 thread in a hole drawn at 5 mm, the thread's own size (nothing was cut: the wall only turned faceted)",
|
||||
"what": "a modelled thread on a hole that isn't the thread's size: refused with the size to use, never a silent change of the hole",
|
||||
"source": "analytic",
|
||||
"method": "ISO 68-1 basic profile: H = P sqrt3/2, basic depth 5H/8. External groove (the space between teeth): a trapezoid P/4 wide at the root radius d/2 - 5H/8, widening by 2 tan30 per unit of radius to 7P/8 at d/2. Internal groove: P/8 wide at the major radius d/2, widening to 3P/4 at the minor radius, cut only where there is material (r >= hole radius). Pappus: volume per turn = 2 pi A rc (A the trapezoid area, rc its centroid radius from the axis); a helical sweep of L/P turns removes exactly (L/P) x that, where each end of the thread is a free end or lies inside material. A 5 mm hole through a D14 x 4 disc, drawn at the thread's nominal size, takes a modelled M5: the hole is first filled to the tap drill (major - pitch = 4.2 mm, rho=2.1), then the groove is cut, the same thread as in a hole drilled at the tap drill. Whole length, both ends free (5 turns): V = pi 7^2 4 - pi 2.1^2 4 - 5 x V_turn(clipped at rho) = 615.7522 - 55.4177 - 5 x 1.87431 = 550.9629 mm3. The thin lips a tap leaves at each end are below 0.2% of the volume. Tolerance 1%: a modelled thread is a faceted helical solid (radial chord error up to 1% of the pitch on every wall, i.e. a volume deficit of about 4/3 x sag/R).",
|
||||
"outcome": "solid",
|
||||
"body_count": 1,
|
||||
"volume_mm3": 550.9629,
|
||||
"tolerance": {
|
||||
"rel": 0.01
|
||||
},
|
||||
"bbox": {
|
||||
"min": [
|
||||
-7,
|
||||
-7,
|
||||
0
|
||||
],
|
||||
"max": [
|
||||
7,
|
||||
7,
|
||||
4
|
||||
]
|
||||
},
|
||||
"center_of_mass": [
|
||||
0,
|
||||
0,
|
||||
2.0
|
||||
]
|
||||
"method": "Decision (#1018, #2853): a modelled thread never changes the size of the hole it is on; one that isn't the thread's size is refused, naming the size to use. A fill-to-tap-drill or turn-down option would be opt-in, off by default (see #3060), and get its own case. The refusal's numbers, from ISO 68-1 (H = P sqrt3/2, basic depth 5H/8): M5 (P 0.8): tap drill = 5 - 0.8 = 4.2 mm; basic depth 5H/8 = 5/8 x 0.8 x sqrt3/2 = 0.433 mm; a 5 mm hole is at the major diameter, so the internal thread (major d, minor d - 2 x 5H/8) cuts 0.00 mm. Expected message: \"this 5 mm hole is too wide for a modelled M5 thread: it would cut 0.00 mm of the thread's 0.43 mm depth; drill 4.2 mm for M5, or thread this hole M6\".",
|
||||
"outcome": "refused",
|
||||
"refusal": "this 5 mm hole is too wide for a modelled M5 thread: it would cut 0.00 mm of the thread's 0.43 mm depth; drill 4.2 mm for M5, or thread this hole M6"
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user