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OP 7 completed on the MP-44 trunnions

Op 7 has been completed. This is a major mill stone on making the MP-44 trunnions. The rest of the machining will be done on the manual mill. It will be easier on the manual mill then making the number of fixtures and tooling that would be required on the cnc machining center.

This is […]

More on the MP-44 trunnion

Operation 6 has been completed on the MP-44 trunnions. A couple of problems were noted. The first is the difference in length on the front of the trunnions and the second was the fit up of the locking shoulder.

This photo shows the difference in the lengths

You can see the corrected locking shoulder fit […]

MP-44 trunnions finish op 6

We have finished operation 6 on the MP-44 trunnions. The reason that we started with 6 samples was to insure that we would have correct samples when we finished. Two of the trunnions ended up out of spec after we finished this operation. The drawings and cam programing were changed to correct and problems. These […]

Continuing the MP-44 trunnion

We have just completed the first operation 6 on the trunnion. It has also pointed out a few minor differences. When we started this project all we had was an original trunnion in very bad condition and a collection of out of spec drawings with incorrect dimensions.

Later a trunnion in very good […]

MP-44 Trunnions up date

We have now finished the first six test pieces up to the 5th operation. This next week we will complete op’s 6 and 7 and send them for verification for proper fit.

With the first 5 operations completed we will be starting on op6 soon. This is a master cam simulation of the process.

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MP-44 trunnion part 2

The next machining operation has been completed on the trunnion. This is one of the many unexpected problems with reverse engineering a component. The magazine did not fit. An error occurred that was missed. It is a good thing to check after every step which we do.

You can see the differences here and it […]

Making the VG1-5 cocking handle

Sunday was spent bending all the cocking handles for the VG1-5 project. These are the steps necessary to accomplish that task.

step 1

Step 2

step 3

step 4

The complete process.

This is the video taken to accomplish this part.

 

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Reverse Engineering and machining the MP-44 trunnion

Here at Gun Lab we do a fair amount of reverse engineering, most of what we like to make have no drawings. However when there are drawings or solid models available we will use them. With this said I have found that most of what is available on the internet or in books is just […]

Pressing the AR-180B bolt hold open

Previously I showed a few pictures of the process in pressing the AR-180B bolt hold open device.

We started with a laser cut then machined blank.

This is the video showing the steps.

And after the pressing operation we have a completed part ready for heat treat.

 

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Weekend update for 7-6-15

A number of projects were tackled this weekend, as always around here. First the comm trench was completed and 3 sets of cat 6 wiring was pulled.

Next weekend I will bring it into the shop.

A small a/c unit was set up in the wood shop. It is not big enough but it does […]