Today I 3D scanned a stone aged axe my Grandad found many years ago in England. I have always loved the shape and form of the tool and how it fits perfectly into the hand.
I wanted to use this form to create tools to make forms for pieces for the house.
I scanned the axe at the university and then used the files to create both silversmithing stakes and hammers.
For the stakes I kept the original size of the axe and added a section that would allow it to be gripped in a vice. For the hammers I scaled down the model to 85mm and cut out a hole for the handle.
I am planning on 3D printing the models and casting them possibly in bronze.
I have been working more on my egg cups this week. I just? I am now happy with the general shape of them. If there is one thing I am a little disappointed about it is that I have lost the thickness created by colquing the edge and then cutting it off.
I started planishing one of the cups. I soon found that there were a few lines still visible in the head of the hammer from the 3D printing. I sanded and polished these out before continuing.
Before planishing the cups I annealed the copper again and drew on lines as I did when raising. I then planished from the inside out twice and I may repeat this again. I am happy with the shine this has created.
I used my texturing hammer to try and harden up the neck of the spoon. Although I like the effect I find think this is the right piece to use it on. I want my cutlery to be smooth and sleek and all about the lines. I think I may need to make a stake and planish these to a high finish to toughen them up.
I got my first press mould back from the make space this week. I decided I would just print the spoon to begin with as a test. I first used some 0.35mm copper to make sure both the press was strong enough and I can use the thin copper one as a master shape.
I after cutting this out I hammered it flat and used it as a template for a 1mm thick press.
I am happy with both the shape of the handle and the spoon, however the neck is a little thin and I feel I need to plannish this to strengthen it. I may need to make a stake for this as nothing is fitting in the workshop.
I spent some time cleaning up. I think I need to make the shape of the neck a little thinner on the template as this one was overlapping slightly. This will also hardened the metal more but I’m risking loosing strength in the width.
To be continued………..
I have been really enjoying raising metal in the workshop over the last few months. Aside from getting very toned in one arm, there is something very therapeutic about creating objects by hand.
I first cut out two disks 75mm radius. I later had to cut this down by about 12mm so I should have begun with 62-64mm. This means the edge on this piece will be thinner than I would like.
I have almost got them to the shape I like but want to bring in an egg next week to make sure they fit perfectly.
I plan to 3D print and cast matching bases for them.
I have been raising a small water jug which I intend to make into a set with two glasses over the next few weeks.
I used my 3D printed brass hammer to do most of the raising. I wanted to take a similar from to a traditional whisky tumbler only with a small spout.
I finished off the piece with my 3D printed steel texturing hammer which gave an interesting finish.
The last thing I did was hammer in the spout. I used the edge of a hammer to do this. I still have some finishing to do. I’m not entirely happy with the shape around the middle and around the rim.
I feel I may need to make a wooden stake to give me the right shape.
I am planning on 3D printing a base for it to stand as well as a matching handle.
This week I have started to design my cutlery in CAD. I have been thinking about this for a long while and trying to decide weather to hand forge them with my 3D printed hammer or press them. As I have time restraints on the build I decided that pressing them would cut down time in production of a large quantity.
I have played around with shapes and forms and decided to go for something simple but with a twist in the form. The CAD models have taken about 3-4 days of trying to come up with the best forms. I’m the end I used a combination of t-splines and surface modelling. Although the surface modelling took a lot longer I got better results.
I should get the press mold back next week to try the spoon as a test. Then I can make any tweeks I need to make to the design of the mould fore the rest or the range.
I had a very exciting few days in the workshop testing my hammer. One thing that I didn’t realised was that the handle was too big to grip properly. So I went to the wood workshop and got it sanded down on the belt sander.
Sandra Wilson then gave me a quick afternoon master class in Dutch Raising. Dutch raising differs from the more well known technique of angle raising in that you hammer from the inside of your piece out. This creates a wave in the metal as you push the metal round. After each round you calque the edges and the re-anneal.
The second day I continued the piece and go to the planishing stage. I used my 3D printed steel planishing hammer. I also used the wrong steak at one point which put dints into the bottom of the bowl. I actually quite liked this so I ran with it.
I wanted to finish the bowl well and in an interesting way. I had some copper foil which I wanted to use for the inside of the bowl. I tried a sample of copper on copper kuem-boo but this didn’t work because copper doesn’t fuse. the samples just flaked off and they also changed to a more pastel colour.
I decided then to leaf the inside using adhesive. The outside of the bowl I finished with platinol and I burnished the top edge to a shine.
After going through many CAD model designs for the stool. I decided to have a go at constructing a stool thought 3D printing plastic joins that would hold the structure in place whilst welding. I ran into a few problems very quickly in the construction of the base. After welding most of the base together I realised that the steel had warped. this could have been due to heat expansion.
There were also parts of the design that were too close together and difficult to impossible to weld.
After spending a few weeks on this I decided to go back to the drawing board and simplify the design. I drew many other models that gradually became more simple. I still wasn’t entirely happy with the construction and felt what I was trying to achieve was far too complex and may not end up with a good result.
After discussion with Jon Christie about furniture he suggested that a simple three lagged stool is the most stable stool you can have. As the stool is for my workshop I felt it was an important design idea. I then spent a few more CAD models perfecting just one element that would be 3D printed to hold together my stool.
The piece can be screwed into the seat from the middle and the three legs can be slotted in. I am now in the process of 3D printing a prototype to test the element.
One of the main tools I need in my kitchen would be knives. This is the second knife I worked on. For this I designed the knife in CAD and 3D printed the blade in steel. The cost of a solid knife was far too expensive to justify 3D printing, so I decided to cut out most of the weight from the middle of the knife.
I then used algorithms in grasshopper to put back in place a structure to give more strength to the piece. Using grasshopper allowed me to play with the structure until I found an arrangement I was happy with. This was great in this particular case as if I had drawn this in rhino alone I would have only had the option I had drawn and it would have been far more difficult to change.
The knife cost £34.15 to print from Shapeways.
The first job I had was to sharpen the blade. I didn’t want to temper the steel so I avoided using a machine to grind the edges. At first I used a file which took off most of the edge. I was then given a sharpening stone from a friend which was far easier for the job and took very little time.
The next job I had was to make the handle. I wanted a contrast in the piece between handmade and CAD build work as I felt this would add part of my soul into the work more with combining the handmade element.
I cut a piece of metal to act as a stopper at the end of the handle. This slipped down to join between the handle and the blade to make the piece look a bit neater. I then made the handle using a piece of exotic hard wood called black plamera. I cut the wood in half and cut out the shape of the handle. In the centre of the piece I placed some dark blue acrylic sandwiched between light gathering plastic so that when you hold it up to the light you can see through the piece.
After gluing the handle together with epoxy resin I glued two brass rods though the handle to secure.
I then filed the handle into shape and sanded down to a high finish. I used Danish oil to finish the wood to a high polish.