Grinding methods: “Form grinding is used to grind gear teeth, threads, splined shafts, and shaped holes.” Evaluate the statement.

Difficulty: Easy

Correct Answer: Correct

Explanation:


Introduction / Context:
Form grinding employs a grinding wheel dressed to a specific profile that mirrors the desired workpiece form. This technique is used wherever complex profiles must be generated with high precision and surface finish—common in gears, threads, splines, and special forms like dovetails and shaped bores.


Given Data / Assumptions:

  • A profiled (dressed) wheel is available to replicate the target geometry.
  • Suitable machine rigidity and dressing accuracy are provided.
  • Work materials and wheel bonds are appropriately matched.


Concept / Approach:
By dressing the wheel to the negative of the desired profile, the wheel flank generates the correct shape on the work. In gear grinding, the involute form is produced either by form wheels or generating methods; in thread grinding, the helix is produced with a form wheel tracking the lead; splined shafts rely on profiled teeth gaps. Shaped holes can also be finished with internal form grinding using properly dressed internal wheels.


Step-by-Step Solution:

Identify the need for a precise profile → gear tooth space, thread flank, spline groove, shaped bore.Dress the grinding wheel to the appropriate form.Grind with controlled infeed and traverse to reproduce the form.


Verification / Alternative check:
Manufacturing texts and machine catalogs list “form grinding” specifically for these components, in contrast with plain surface or cylindrical grinding which produce flat or simple cylindrical surfaces.


Why Other Options Are Wrong:
Restricting the method to only one component type ignores its broader applicability; therefore, “Correct” is the best evaluation.


Common Pitfalls:
Insufficient wheel dressing accuracy; neglecting wheel wear compensation; misunderstanding that generating gear grinding is a different method from form grinding though both can produce gears.


Final Answer:
Correct

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