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Milled components / PRODUCT CASE
Aluminum positioning block: define datums, pockets and acceptance
Use this photographed aluminum positioning-block reference to define the locating faces before specifying pockets and holes. Distinguish the fixture contacts from clamping surfaces, state the aluminum grade and delivered finish, and agree dimensional records separately from a fixture-fit trial.
Which faces locate the block, and how should its pockets and holes be referenced from them?
02 / READ THE GEOMETRY
Details that shape the requirement.
01
Which faces locate the block?
Show the installed position and mark the faces that contact the fixture. Separate locating contacts from clamping faces and non-functional exterior surfaces, so drawing review and inspection use the intended references.
02
Which pocket surfaces contact the mating part?
Provide the pocket outline, internal corners and depths on the current drawing. Mark contact surfaces separately from clearance regions. Identify geometry that is open for a machining proposal, rather than treating an unapproved change as the quoted design.
03
What does each hole do?
Label each hole by its function: location, fastening or passage. Identify the required size and position from the chosen drawing references, and include relevant mating hardware. A similar-looking hole should not be assumed to have the same acceptance requirement.
FROM GEOMETRY TO THE WORKSHOP
See the manufacturing context.
Explore a Chengshuo workshop scene alongside the features in this product study. This is general process footage, not footage of the reference part or its inspection results.
Chengshuo footage7 sec
Milling, workholding and tool access
Machine-interior views show the spindle, cutting tool and held components.
Mark the locating contacts, pocket interfaces and clearance regions on the same assembly view. State which geometry is fixed and which points are open for review, so a proposed machining change can be assessed before it becomes a drawing revision.
Compare the same drawing revision, material grade, finish, quantities and inspection scope. List proposed alternatives and exclusions separately so purchasing can compare the scope behind each price.
Identify the characteristics that need recorded results and the references used to evaluate them. Agree the sample identification, measurement method and reporting scope before comparing supplier and receiving checks.
Supply an assembly view showing how the block sits in the fixture, with locating contacts and fastening interfaces identified. Compare the original positioning-block photographs with your own geometry; your drawing controls the material, dimensions and acceptance requirements for the new part.
02Review pocket and hole access
Review pocket shape, internal corners and hole access together using the CNC milling capability page as a process entry point. Record any proposed geometry change on the drawing before using it as a quotation or sample basis.
03Create a feature-based inspection plan
Use the inspection requirements guide to identify critical characteristics and their measurement references. Agree the record scope and any trial fit with a nominated fixture or mating component before the first sample review.
04 / BEFORE SAMPLE APPROVAL
Agree what acceptance will show.
Verify the defined reference faces and critical pocket dimensions.
Check specified hole size and location from the agreed datum arrangement.
Inspect contact edges and record any agreed fixture-fit observations.
Product reference & scope
This case uses a photographed Chengshuo component to explain the drawing, purchasing and inspection decisions for a similar part. Project specifications and acceptance are agreed during review.
Make the fixture contacts the starting point for the RFQ
Locating and holding
Mark the installed orientation, locating faces, fastening contacts and clearance regions on one view. Keep inspection references consistent with the function required by the drawing.
Pockets and holes
Define pocket contact areas, depths and corners, then identify which holes locate, fasten or provide passage. List any proposed geometry changes separately for design review.
Material and evidence
State the aluminum grade, delivered finish, sample and production quantities. Agree feature-level records and any separate fixture-fit trial before comparing suppliers.
Use the original photographs to discuss the block geometry and the workshop clip for manufacturing context. Identify the part-specific inspection records separately.
Questions before your drawing review
Does the reference photograph define a standard block I can order unchanged?
No. It is a Chengshuo geometry reference. Your current drawing must define the required dimensions, aluminum grade, finish and acceptance scope for the part being quoted.
Are the clamping faces automatically the locating datums?
No. Mark the faces that locate the block in the actual fixture and distinguish them from holding or clearance surfaces. Use the agreed drawing references for the pocket and hole requirements.
Can a pocket corner be changed to suit a tool without approval?
Treat that as an identified proposal. Compare the mating-part contact and clearance requirements, then obtain the authorized design decision before using a changed geometry as the quotation or sample basis.
Does “aluminum” specify an alloy and final surface?
State the required material grade and condition, finishing and critical surface requirements in your drawing package. Use the reference photograph to discuss the component geometry.
What should sample inspection and a fixture-fit trial record?
Link dimensions and geometric relationships to the drawing revision, feature identifiers and sample identity. Agree any separate trial with the nominated fixture or mating part, its conditions and the responsible reviewer.
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