I sometimes have to press premade registers and pins into molds that are >rather to large to hold flat easily on the arbor press or my shop press.
Also the location can be awkward. I was thinking it might be useful
to setup a small HEAVY table with some rails to move the bridge of a >hydraulic press back and forth for this purpose. I have seen presses
that will allow for side to side movement of the ram. They roll on
bearings, but when activated a large flange is pressed against the
bottom of the bridge.
Ok... tell me everything that is stupid about this idea.... Well
besides the fact that I don't have to do it that often so its kind of
like swatting flies with a 2 x 4.
"Bob La Londe" wrote in message news:sg8glm$22t$1@gioia.aioe.org...
I sometimes have to press premade registers and pins into molds that are rather to large to hold flat easily on the arbor press or my shop press.
Also the location can be awkward. I was thinking it might be useful
to setup a small HEAVY table with some rails to move the bridge of a hydraulic press back and forth for this purpose. I have seen presses
that will allow for side to side movement of the ram. They roll on bearings, but when activated a large flange is pressed against the
bottom of the bridge.
Ok... tell me everything that is stupid about this idea.... Well
besides the fact that I don't have to do it that often so its kind of
like swatting flies with a 2 x 4.
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This email has been checked for viruses by AVG.
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-----------------------
I solved a heavy lifting and sliding problem at Segway by ordering a
platform stacker similar to this: https://www.northerntool.com/shop/tools/product_200273774_200273774
It's so handy as a mobile work platform or extension table that I bought
one for $10 at an auction to use around the house, mostly to work on motorized yard equipment. It drops lower and raises higher than a
scissors lift table. A lever chain hoist replaced the broken hydraulics.
"Bob La Londe" wrote in message news:sg8glm$22t$1@gioia.aioe.org...
I sometimes have to press premade registers and pins into molds that are rather to large to hold flat easily on the arbor press or my shop press.
Also the location can be awkward. I was thinking it might be useful
to setup a small HEAVY table with some rails to move the bridge of a hydraulic press back and forth for this purpose. I have seen presses
that will allow for side to side movement of the ram. They roll on
bearings, but when activated a large flange is pressed against the
bottom of the bridge.
Ok... tell me everything that is stupid about this idea.... Well
besides the fact that I don't have to do it that often so its kind of
like swatting flies with a 2 x 4.
'''-- <- Sig marker commented out. OK?
This email has been checked for viruses by AVG.
https://www.avg.com
-----------------------
I solved a heavy lifting and sliding problem at Segway by ordering a
platform stacker similar to this: https://www.northerntool.com/shop/tools/product_200273774_200273774
It's so handy as a mobile work platform or extension table that I bought
one for $10 at an auction to use around the house, mostly to work on motorized yard equipment. It drops lower and raises higher than a scissors lift table. A lever chain hoist replaced the broken hydraulics.
I sometimes have to press premade registers and pins into molds that are rather to large to hold flat easily on the arbor press or my shop press.
Also the location can be awkward. I was thinking it might be useful
to setup a small HEAVY table with some rails to move the bridge of a hydraulic press back and forth for this purpose. I have seen presses
that will allow for side to side movement of the ram. They roll on
bearings, but when activated a large flange is pressed against the
bottom of the bridge.
"Bob La Londe" wrote in message news:sg8glm$22t$1@gioia.aioe.org...
I sometimes have to press premade registers and pins into molds that are rather to large to hold flat easily on the arbor press or my shop press.
Also the location can be awkward. I was thinking it might be useful
to setup a small HEAVY table with some rails to move the bridge of a hydraulic press back and forth for this purpose. I have seen presses
that will allow for side to side movement of the ram. They roll on bearings, but when activated a large flange is pressed against the
bottom of the bridge.
Ok... tell me everything that is stupid about this idea.... Well
besides the fact that I don't have to do it that often so its kind of
like swatting flies with a 2 x 4.
-----------
A gantry crane is a fine answer to lifting problems as it makes you
Superman, able to lift great weights and fly them through the air. Their problems for me are that they are expensive, bulky and unable to operate
off level pavement. https://www.harborfreight.com/1-ton-telescoping-gantry-crane-41188.html
For temporary hoisting and moving loads under 1/2 ton I rig two 8'
sections of (salvaged) channel iron overhead and run HF beam trolleys
#97392 on them with chain hoists. Individually the channels are about
half the weight of one comparable Wide Flange beam, easy for two people
to lift and manageable for one with stepladder aid. I set up and took
down the 16', 200 Lb gantry track by myself by attaching boat trailer
winches to the supporting tripod legs with muffler clamps.
The bolts that join the channel webs at the ends provide several possibilities for leveling hangers, such as turnbuckles or long forged
eye bolts. Depending on length and load the channels may need
intermediate bolts and spacers connecting the webs to prevent shear and lateral deflection. A single W section beam is better for a permanent installation, but more difficult to erect and suspend. The channel
requires only a few bolt holes through the web. I used a battery drill
and a Portalign. https://www.engineeringtoolbox.com/beam-stress-deflection-d_1312.html https://www.engineeringtoolbox.com/american-standard-steel-channels-d_1321.html
https://www.engineeringtoolbox.com/american-wide-flange-steel-beams-d_1319.html
Two hoists could lift a pair of long angle irons under the sides of the
mold, held in place with threaded rod. The rigid slings at the ends
could be slotted angle which allow width changes and suspend the mold
from above its center of gravity. Web slings might let the load twist
and fall. As long as you can jack up one side of the mold to remove or
place the angle irons this should allow you to shift the mold in and out
of the press and set it on the bed. The same rig works even better if
the mold has corner lift eyes.
The wheels on the 97392 need to be turned a little smaller to fit into
3" x 4.1 channel. They fit as-is in 4" (high) x 5.4 (Lbs per foot)
channel. The trolley is easier to assemble onto the beam if you drill
the lower corners for long bolts or threaded rod that holds the sides in place while fitting the hanger rod and spacers.
I use a trolley and hoist at each end to move logs into or out of the
storage shed, thus I stay outside the stack, clear of danger if logs
shift sideways. Once the log is more than half way out I chain the outer
end to the overhead track and move the trolley and hoist to the center
so the log can be swung a quarter turn onto the sawmill bed. The
overhead track is permanent within the shed, temporary outside it.
I described this as if starting from scratch. My second 3" channel
trolley is a shop made mount for the HF 1300 Lb electric hoist that lets
me stay even further from the load than a manual chain fall allows. When working out back away from power it takes a centered eye bolt to hang a
lever chain hoist. The electric hoist starts with a jolt that visibly deflects the track, so I've considerably derated its load capacity. A
manual hoist can position much more precisely.
Good luck.
"Bob La Londe" wrote in message news:sgdq1g$fv2$1@gioia.aioe.org...
I was not at all talking about lifting and hauling a piece of stock. I
was talking specifically about making a press with a X & Y moveable ram.
** I was thinking it might be useful to setup a small HEAVY table with
some rails to move the bridge of a hydraulic press back and forth for
this purpose. **
Like a bridge mill, but reinforced differently with a hydraulic ram
instead of a spindle.
--------------------
You wrote about moving the ram to the mold, I suggested two fairly
simple and inexpensive alternatives to position the mold under the ram because of the difficulty I've had designing and building a man-portable bridge-like structure to withstand only one ton, using material on hand that's too large to accurately machine on my mill (or fit in my shop).
It's the inverse of your problem, with tension and compression swapped.
The Engineeringtoolbox references should help you size the structural elements to the desired span and force.
"Cam followers" are stud-mounted rollers that are easy to turn into low profile retractable landing gear for the heavy moving parts. Since the
ram will lift the bridge upward they might not even have to retract.
Maybe you could find and use an old radial arm drill press to press in
the pins? https://nsmachine.com/product/4-x-9-cincinnati-bickford-radial-arm-drill-2/
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