We claim:
1. A lapping device (100, 200, 300, 400, 500) for lapping a surface (372, 472,
572) of a workpiece (370, 470, 570), the lapping device (100, 200, 300, 400, 500)
comprising:
5 a first member (102, 202, 302, 402, 502) rotatably couplable to a rotary
spindle (252, 352, 452, 552) of a machining center (250, 350, 450, 550), wherein
the first member (102, 202, 302, 402, 502) comprises a cavity (112);
a resilient member (104, 304, 404, 504) placed inside the cavity (112);
a second member (106, 204, 306, 406, 506) comprising:
10 a body portion (116) having a first end (116A) and a second end
(116B) opposite to the first end (116A), wherein the first end (116A) has anabrasive surface (120, 210, 312, 412, 512); and
an elongate member (118, 310, 410, 510) projected out from the
second end (116B), wherein the elongate member (118, 310, 410, 510) is
15 received by the cavity (112) to abut one end of the resilient member (104,
304, 404, 504) against a surface of the first member (102, 202, 302, 402,
502) and abut another end of the resilient member (104, 304, 404, 504)
against the elongate member (118, 310, 410, 510); and
a coupling mechanism (108, 206. 308, 408, 508) to couple the first member
20 (102, 202, 302, 402, 502) with the elongate member (118, 310, 410, 510), wherein, upon contacting of the abrasive surface (120, 210, 312, 412, 512) with
the surface (372, 472, 572) of the workpiece (370, 470, 570) and under a
resilience force of the resilient member (104, 304, 404, 504), the second member
(106, 204, 306, 406, 506) is to move along a longitudinal axis (A) to match a
25 profile of the abrasive surface (120, 210, 312, 412, 512) with a profile of the
surface (372, 472, 572) of the workpiece (370, 470, 570).
2. The lapping device (100, 200, 300, 400, 500) as claimed in claim 1, wherein
the elongate member (118, 310, 410, 510) has a structure complementary to a
structure of the cavity (112).3. The lapping device (100, 200, 300, 400, 500) as claimed in claim 1, wherein the
first member (102, 202, 302, 402, 502) comprises a column (114, 208) to couple
the first member (102, 202, 302, 402, 502) with the rotary spindle (252, 352, 452,
552) of the machining center (250, 350, 450, 550).
5 4. The lapping device (100, 200, 300, 400, 500) as claimed in claim 1, wherein the
first member (102, 202, 302, 402, 502) comprises at least one circular slot (122,
302A) and the elongate member (118, 310, 410, 510) comprises at least one
longitudinal slot (124, 310A).
5. The lapping device (100, 200, 300, 400, 500) as claimed in claim 4, wherein the
10 coupling mechanism (108, 206, 308, 408, 508) is to engage the at least one
circular slot (122, 302A) with the at least one longitudinal slot (124, 310A) to
couple the first member (102, 202, 302, 402, 502) with the elongate member (118, 310, 410, 510) for a rectilinear movement of the second member (106, 204, 306,
406, 506).
15 6. The lapping device (100, 200, 300, 400, 500) as claimed in claim 1, wherein the
resilient member (104, 304, 404, 504) is a pre-loaded spring.
7. The lapping device (100, 200, 300, 400, 500) as claimed in claim 6, wherein the
resilient member (104, 304, 404, 504) is placed between the first member (102,
202, 302, 402, 502) and the elongate member (118, 310, 410, 510) in a coaxial
20 orientation 8. The lapping device (100, 200, 300, 400, 500) as claimed in claim 1, wherein,
when the elongate member (118, 310, 410, 510) is received by the cavity (112), a
circumferential gap (G) is created between the elongate member (118, 310, 410,
510) and the cavity (112).
25 9. The lapping device (100, 200, 300, 400, 500) as claimed in claim 8, wherein the
circumferential gap (G) is to cause the lapping device (100, 200, 300, 400, 500) to
align the abrasive surface (120, 210, 312, 412, 512) with the surface (372, 472,
572) of the workpiece (370, 470, 570), wherein, upon a contact of the abrasive surface (120, 210, 312, 412, 512) with the surface (372, 472, 572), a uniform
pressure is applied throughout the surface (372, 472, 572).
10. The lapping device (100, 200, 300, 400, 500) as claimed in claim 1, wherein
the abrasive surface (120, 210, 312, 412, 512) is trapezoidal in shape.
5 11. The lapping device (100, 200, 300, 400, 500) as claimed in claim 1, wherein
each of the first member (102, 202, 302, 402, 502) and the second member (106,
204, 306, 406, 506) has a cylindrical profile.