Author Topic: MEM Corliss Attempt  (Read 7231 times)

Offline Larry

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Re: MEM Corliss Attempt
« Reply #60 on: October 21, 2019, 09:21:23 PM »
GUIDE and CRANKSHAFT SUPPORT - This assembly will be fabricated in 4 parts: (1) Crankshaft Support (2) Crosshead Guide Support (3) Base (4) Valve Lever Pivot. The Crankshaft Support is machined from a piece of scrap aluminum 1/2" (.511 actual) x 1 3/8 x 4.622. The drawing shows an end cut out with square corners. I used a 1/4" end mill and left the corners with a 1/8" radius. The center cut out was chain drilled and finished with a 1/2" end mill leaving a 1/4" radius at the 3 corners. Base of center section was machined to correct dimensions.

171851065 - Crankshaft Support - 1/2" (.511 actual) x 1 3/8" x 4.622" aluminum.
9044 - Machine end cut out with 1/4" end mill leaving corners with 1/8" radius.
9045 - Chain drill center cut out.
9047 - Mill cut out with 1/2" end mill leaving 1/4" radius at 3 corners.
165511579 - Center cut out almost complete.
9051 - Machine base to correct dimensions.


Offline Larry

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Re: MEM Corliss Attempt
« Reply #61 on: October 21, 2019, 09:53:46 PM »
CRANKSHAFT SUPPORT (continued) - Drill holes on top for bearing block. Thread one hole on top #5-40, 1/4" deep. Drill two .136 (#29) holes on left for connecting Crankshaft Support to Crosshead Guide Support. C'Bore 7/32" (.218) x .150 deep. These two holes are not shown on drawing.

163112676 - Drill 2 holes on top right for bearing block.
164348332 - Thread one hole on top #5-40 , 1/4" deep.
9056 -  Drill 2 mounting holes (.136) (#29 drill) on left for connecting crankshaft support to crosshead guide support. C'Bore 7/32" (.218) x .150 deep for #5-40 SH screws.
            These 2 holes are for assembly of parts and not shown on drawing.
132328185 - (Same as above.)

Offline b.lindsey

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Re: MEM Corliss Attempt
« Reply #62 on: October 21, 2019, 11:22:23 PM »
Guess I missed a couple of updates Larry. Things are really coming along well. This one is on my list for sometime.

Bill

Offline Larry

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Re: MEM Corliss Attempt
« Reply #63 on: October 23, 2019, 02:51:41 AM »
GUIDE & CRANKSHAFT SUPPORT - (BASE) : The base was machined to size (1/8" x 7/8" x 2.563") from a piece of 1/8" aluminum flat bar. The two mounting holes (#29) (.136) were drilled per dimensions on the drawing. Three holes were drilled and CSK so the base could be attached to the bottom of the Crosshead Guide Support with #5-40 FH screws.

163836137 - Base plate (1/8"x7/8"x2.563") shown in front.
9059 - Drill 3 holes for mounting base to crosshead guide support.
9061 - Countersink 3 holes for #5-40 FH screws.
175411537 - Base attached to crosshead guide support with #5-40 FH screws.
175427884 - Assembly.
175352263 - Assembly.

Offline b.lindsey

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Re: MEM Corliss Attempt
« Reply #64 on: October 23, 2019, 02:31:35 PM »
Beautiful looking parts Larry!! Still following along.

Bill

Offline Larry

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Re: MEM Corliss Attempt
« Reply #65 on: December 05, 2019, 04:01:44 AM »
GUIDE & CRANKSHAFT SUPPORT - (CROSSHEAD GUIDE SUPPORT)  -  The Crosshead Guide Support was made from a piece of 5/8" (.625) scrap aluminum. It was machined to 1.526" x 2.312" per the drawing. I then used a small face mill to reduce the thickness to 9/16" (.563). Two #5-40 holes were drilled & tapped on the side & three #5-40 holes were drilled & tapped on the bottom for assembly with the other parts. These holes & dimensions are not shown on the drawing. To be continued.

163836137 - Crosshead Guide Support (.625 x 1.526 x 2.312) shown in middle.
173126253 - Drill 3 #38 blind holes in bottom.
9066 - Tap 3 #5-40 holes in bottom.
9083 - Drill 2 #38 blind holes in side.
9085 - Tap 2 #5-40 holes in side.

Offline gbritnell

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Re: MEM Corliss Attempt
« Reply #66 on: December 05, 2019, 12:32:18 PM »
Coming along nicely Larry. You'll be very happy with it when complete. It's a nice design.
gbritnell
Talent unshared is talent wasted.

Offline b.lindsey

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Re: MEM Corliss Attempt
« Reply #67 on: December 05, 2019, 03:09:56 PM »
Good to see an update Larry, I always enjoy following your threads and this one is no exception.

Bill

Offline Larry

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Re: MEM Corliss Attempt
« Reply #68 on: December 07, 2019, 12:24:46 AM »
Thanks George & Bill for your kind comments. They are greatly appreciated.

CROSSHEAD GUIDE SUPPORT (continued) - The Crosshead Guide Support was mounted in the vise and the !.125 hole location was centered in preparation for boring. A pilot hole was drilled large enough to accommodate the boring bar. The boring head was mounted in the spindle and the hole bored to approximate size. The hole was finished to size using the telescoping gage and micrometer to measure final inside dimension. The block was then mounted in the vise and the .152 x 1.062 corner was removed using a 2 FL end mill.

9089 - Center 1.125 hole location & drill pilot hole.
9093 - Mount boring head in spindle and bore to approximate size.
9096 - Finish hole to size using telescoping gage & micrometer to measure final inside dimension.
9106 - Remove .152 x 1.062 corner using a 2 FL end mill.

Offline Larry

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Re: MEM Corliss Attempt
« Reply #69 on: December 08, 2019, 01:58:43 AM »
CROSSHEAD GUIDE SUPPORT (continued) - The rotary table was mounted on the mill along with the CO-AX indicator. I used my small chuck to mount the block and clamped on the inside hole. Spacers (3/32") were installed on the bottom of the block next to the chuck jaws to provide clearance for the end mill. The block was centered using the CO-AX indicator in preparation for turning the .687 (11/16") radius. The radius was turned using a 1/4" 2 FL end mill @ 1900 rpm. I was very pleased with the final result not having done this in a long time.

9122 - Rotary table with small chuck and CO-AX indicator mounted on mill. Block was clamped on inside hole. Spacers (3/32") were installed on the bottom of the block next   to chuck jaws to provide clearance for the end mill. Block was centered using the CO-AX indicator. The .687 (11/16") radius was turned using a 1/4" 2 FL end mill @ 1900 rpm. I removed about .005 on each pass.

9124 - Turning radius (full view).
9126 - Turning radius (close up).
9129 - Turning radius (full view-no chips).
9133 - Turning radius (close up-no chips).
9134 - Finished part.
9135 - Finished part.





Online crueby

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Re: MEM Corliss Attempt
« Reply #70 on: December 08, 2019, 02:29:18 AM »
Coming along great! 


 :popcorn: :popcorn: :popcorn:

Offline Larry

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Re: MEM Corliss Attempt
« Reply #71 on: December 11, 2019, 02:58:22 AM »
GUIDE & CRANKSHAFT SUPPORT - (VALVE LEVER PIVOT)  The Valve Lever Pivot was made as a separate part from a piece of 1/4" x .724 12L14 steel rod. A hole was drilled and tapped in the center to accommodate a #3-48 screw. The pivot will be inserted in a 1/4" thru hole in the bottom of the left leg on the crankshaft support. This hole was centered on the leg with a vertical dimension of .140. I added .015 to the specified dimension of .125  to avoid drill break out. I believe it may be tight enough but may have to be secured with some Loctite.

9112 - Drill & tap #3-48 hole in center of 1/4" x .724 12L14 steel rod.
9139 - Valve lever pivot complete.
9109 - Drill a thru hole in the left leg of the crankshaft support centered near the bottom and .140 above the base with a "C" (.242) drill.
9110 - Ream hole to 1/4".
9136 - Guide & Crankshaft Support assembly showing valve lever pivot.

Offline Larry

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Re: MEM Corliss Attempt
« Reply #72 on: January 19, 2020, 03:20:45 AM »
PARTS & TEMPORARY ASSEMBLY - Here are several family shots.

141349630 - Individual parts - family shot
142504162 - Temporary assembly - family shot.
142514522 - Temporary assembly - family shot
142523076 - Temporary assembly - family shot.

Offline Larry

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Re: MEM Corliss Attempt
« Reply #73 on: January 19, 2020, 03:39:54 AM »
VALVE LEVER - The Valve Lever was made from a piece of .063 scrap plate with a zinc chromate finish (not brass). It was cut to a width of .188 (3/16") and a length of 2.550 (longer than drawing dimension). This was done to prevent drill break out on the ends. The holes were laid out to dimension and holes were drilled .098 (#40 drill) to accommodate  #3-48 screw.

9147 - Valve lever cut to size from a piece of .063 scrap plate.
9148 - Valve lever with .098 holes located per drawing dimensions. The radius on each end is about .150 from the center of the end holes.

Offline vcutajar

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Re: MEM Corliss Attempt
« Reply #74 on: January 19, 2020, 11:51:01 AM »
Looking really good Larry.   :ThumbsUp:

Vince