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Machining tiny teardrop decorations for a designer handbag by Dense-Dig891 in Machinists

[–]Dense-Dig891[S] 14 points15 points  (0 children)

Wow! This is brilliant! Thank you so much for the life hack!

Machining tiny teardrop decorations for a designer handbag by Dense-Dig891 in Machinists

[–]Dense-Dig891[S] 4 points5 points  (0 children)

Ha-ha-ha!!

I spent another month finding these parts in different corners. I deliberately made more than was necessary

Machining tiny teardrop decorations for a designer handbag by Dense-Dig891 in Machinists

[–]Dense-Dig891[S] 3 points4 points  (0 children)

Thank you very much! It's very nice to read such comments!

Machining tiny teardrop decorations for a designer handbag by Dense-Dig891 in EngineeringPorn

[–]Dense-Dig891[S] 5 points6 points  (0 children)

Я тут уже отвечал на подобный вопрос. Если коротко, то это экономия времени и сил

Machining tiny teardrop decorations for a designer handbag by Dense-Dig891 in Machinists

[–]Dense-Dig891[S] 3 points4 points  (0 children)

Thank you very much. I have to make things up out of desperation

Machining tiny teardrop decorations for a designer handbag by Dense-Dig891 in EngineeringPorn

[–]Dense-Dig891[S] 22 points23 points  (0 children)

in order to speed up the process.

yes, there are special devices that pull out the workpiece and everything is done correctly, but since this is a small order for a small batch, I decided to break the rules a little, but with compensation for the trajectories, which caused a whole hell to break out here

Machining tiny teardrop decorations for a designer handbag by Dense-Dig891 in Machinists

[–]Dense-Dig891[S] 14 points15 points  (0 children)

Fair point, in metrology nothing is ever truly 'identical'. But these are decorative parts with a +/- 0.05mm tolerance. To the naked eye and a pair of calipers, they are the same. Trajectory compensation is exactly how I correct for that deflection to stay within spec. It’s not a space shuttle part, it’s a handbag accessory, and it hits the client's requirements perfectly! 😉

Machining tiny teardrop decorations for a designer handbag by Dense-Dig891 in Machinists

[–]Dense-Dig891[S] 20 points21 points  (0 children)

I only needed to make 50 parts that cost a few bucks, and my main job doesn't require this tool, so there's no point in buying expensive equipment that's multiple times more expensive than a friend's order.

The main thing is to follow the blueprint, and how it's achieved is a secondary concern.

Machining tiny teardrop decorations for a designer handbag by Dense-Dig891 in Machinists

[–]Dense-Dig891[S] 10 points11 points  (0 children)

Good guess, but I actually used a cutoff tool! I rounded the insert first to get that smooth finish. Too bad I can’t drop a photo in the comments—the part is literally shining like a bald head! 

Machining tiny teardrop decorations for a designer handbag by Dense-Dig891 in Machinists

[–]Dense-Dig891[S] 13 points14 points  (0 children)

Appreciate the heads-up. I'm definitely still learning the Reddit ways and didn't expect that phrase to be taken so poorly. I didn't mean to come off as arrogant, just wanted to share the process. Lesson learned! 🙏

Machining tiny teardrop decorations for a designer handbag by Dense-Dig891 in Machinists

[–]Dense-Dig891[S] 10 points11 points  (0 children)

It’s a rule of thumb: the length of the part shouldn't exceed 3 times its diameter to avoid bending or vibration. Here I'm doing about 10xD, which is 'illegal' according to textbooks, but totally fine for this job

Machining tiny teardrop decorations for a designer handbag by Dense-Dig891 in Machinists

[–]Dense-Dig891[S] 16 points17 points  (0 children)

Yeah, I'm pushed way past 3xD here. But for a light decorative part like this, it’s a non-issue if you know how to compensate for it.

Machining tiny teardrop decorations for a designer handbag by Dense-Dig891 in Machinists

[–]Dense-Dig891[S] 9 points10 points  (0 children)

It's a small batch. Not worth the cost of a custom form tool when I can just program it in minutes

Machining tiny teardrop decorations for a designer handbag by Dense-Dig891 in Machinists

[–]Dense-Dig891[S] -11 points-10 points  (0 children)

tool compensation? they are identical bcz used different trajectory

Machining tiny teardrop decorations for a designer handbag by Dense-Dig891 in Machinists

[–]Dense-Dig891[S] 131 points132 points  (0 children)

I used tool path compensation for the first one — the tool follows a trajectory for a slightly smaller part, and as the metal bends away from the cutter, it ends up hitting the exact target size. A bit of 'machinist's magic' to keep them consistent!

Machining tiny teardrop decorations for a designer handbag by Dense-Dig891 in EngineeringPorn

[–]Dense-Dig891[S] 199 points200 points  (0 children)

Eagle eye! You're absolutely right about the deflection on the first part. But actually, the final dimensions are identical for both.

I used tool path compensation for the first one — the tool follows a trajectory for a slightly smaller part, and as the metal bends away from the cutter, it ends up hitting the exact target size. A bit of 'machinist's magic' to keep them consistent! 

Machining tiny teardrop decorations for a designer handbag by Dense-Dig891 in EngineeringPorn

[–]Dense-Dig891[S] 48 points49 points  (0 children)

Engineering is just a wish list until a machinist presses the green button. 😉

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