CN206527667U - Electroplating CBN emery wheel is used in crankshaft journal processing - Google Patents

Abstract

The utility model belongs to the field of superhard abrasive tools, and specifically refers to an electroplated CBN grinding wheel for crankshaft journal processing, which comprises a disc-shaped metal substrate, a fine-grain grinding layer and a coarse-grain grinding layer. Two rings of arc-shaped protrusions are symmetrically arranged on the outer circular surface at the outer corner of the metal base, and two ring-shaped platforms are symmetrically arranged on the side of the outer corner, and the ring-shaped platform and the arc-shaped protrusions are fused at the edge, and the surface Smooth transition, the top plane of the annular platform is the functional side, the inner side is a liquid guiding slope extending downward, and the outer circular surface of the metal base between the two arc-shaped protrusions is the functional end surface. A fine-grain grinding layer is attached to the arc-shaped convex surface and the functional end surface, and a coarse-grain grinding layer is attached to the functional side. The electroplated CBN grinding wheel for crankshaft journal processing can better meet the processing requirements of different parts of the journal, effectively prevent the end surface burn of the journal during the machining process, and improve the processing quality of the crankshaft and the service life of the grinding wheel.

Description

Electroplated CBN Grinding Wheel for Crankshaft Journal Machining

technical field

The utility model belongs to the field of superhard material grinding tools, in particular to an electroplated CBN grinding wheel for crankshaft journal processing.

Background technique

The journal part of the crankshaft of the automobile engine is generally ground with a special electroplated CBN (cubic boron nitride) grinding wheel. During the process, the outer circle of the journal, the end face of the journal and the sinking groove are ground at the same time. Existing grinding wheels of this type are not very effective in processing crankshaft journals, and are likely to cause burns on the end faces of the journals. On the one hand, this is because the cutting fluid is difficult to enter when grinding the end faces of the journals, so it cannot fully participate in cooling; on the other hand , the processing conditions required for the end face of the journal are different from the outer circle of the journal and the undercut groove, which requires a higher grinding efficiency for the corresponding functional area of the grinding wheel. Therefore, it is necessary to carry out targeted transformation of this type of grinding wheel, thereby improving the processing quality of the crankshaft of the automobile engine.

Contents of the invention

Aiming at the problems in the prior art, the utility model reforms the electroplated CBN grinding wheel used for grinding the journal of the crankshaft, so as to prevent the end surface of the journal from being burnt during the machining process.

The electroplated CBN grinding wheel for crankshaft journal processing in the utility model includes a disc-shaped metal substrate, a fine-grain grinding layer and a coarse-grain grinding layer. Two circles of arc-shaped protrusions are symmetrically arranged on the outer circle at the outer corner of the metal base, and two ring-shaped platforms are symmetrically arranged on the side of the outer corner of the metal base, and the ring-shaped platform and the arc-shaped protrusions are on the edge The top plane of the ring-shaped platform is the functional side, the inner side is a liquid-conducting slope extending downward, and the outer circular surface of the metal base between the two arc-shaped protrusions is the functional end surface. A fine-grain grinding layer is attached to the arc-shaped convex surface and the functional end surface, and a coarse-grain grinding layer is attached to the functional side.

Preferably, the angle between the functional side surface and the liquid guiding slope is 8-12°.

Preferably, the width of the functional side is 0.5-1.5 mm.

The fine-grain grinding layer adopts B213 abrasive, and the coarse-grain grinding layer adopts B251 abrasive.

The electroplated CBN grinding wheel for machining the crankshaft journal of the utility model can better meet the processing requirements of different parts of the journal, effectively prevent the end surface burn of the journal during the machining process, and improve the processing quality of the crankshaft and the service life of the grinding wheel.

Description of drawings

Figure 1: Schematic diagram of the structure of the electroplated CBN grinding wheel for crankshaft journal machining;

Figure 2: Schematic diagram of the enlarged structure at A in Figure 1.

Among them: 1-metal substrate (11-arc-shaped protrusion, 12-ring platform, 13-functional side, 14-fluid guide slope, 15-functional end face), 2-fine grain grinding layer, 3-coarse grain grinding Floor.

detailed description

In order to make the purpose, content and advantages of the utility model clearer, the electroplated CBN grinding wheel for crankshaft journal processing of the utility model will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Figures 1 and 2, the electroplated CBN grinding wheel for machining the crankshaft journal of the utility model includes a disc-shaped metal substrate 1, a fine-grain grinding layer 2 and a coarse-grain grinding layer 3. Two rings of arc-shaped protrusions 11 are symmetrically arranged on the outer circular surface of the outer corner of the metal base 1, and two convex annular platforms 12 are symmetrically arranged on the side of the outer corner of the metal base 1, and the annular platform 12 and the arc-shaped protrusion 11 Fused at the edge, the surface transitions smoothly, the top plane of the annular platform 12 is the functional side 13, the inner side is a liquid guiding slope 14 extending downward, and the outer circular surface of the metal base 1 between the two arc-shaped protrusions 11 is the functional side. End face 15. A fine-grained grinding layer 2 is attached to the surface of the arc-shaped protrusion 11 and the functional end surface 15 , and a coarse-grained grinding layer 3 is attached to the functional side 13 .

The functional end face 15, arc-shaped protrusion 11 and functional side face 13 in the electroplated CBN grinding wheel correspond to the journal outer circle, undercut groove and journal end face of the crankshaft journal respectively, and are set on the functional side face 13 in a targeted manner. Coarse-grained grinding layer 3 with higher grinding efficiency, compared with fine-grained grinding layer 2, the abrasive particles in this layer are larger, sharper, and the distance between particles is also larger, which helps to reduce and disperse grinding The heat generated at the time and wear debris are taken out to prevent burns at the end face of the journal and ensure the processing quality of the crankshaft journal.

On the other hand, setting the liquid guide slope 14 helps to introduce the cutting fluid into the gap between the grinding wheel and the end surface of the journal and take away part of the grinding heat, further reducing the probability of burns at the end surface of the journal.

In the manufacturing process of the electroplated CBN grinding wheel, in order to ensure that the functional side 13 is completely covered by the coarse-grained grinding layer 3, the coarse-grained grinding layer 3 may actually extend to the liquid-conducting slope 14, partially or completely covering the liquid-conducting slope 14, which will The basic functions of the grinding wheel will not be affected. In the embodiment, the coarse grain grinding layer 3 is attached to the functional side 13 and the entire liquid guiding slope 14 .

The included angle between the functional side surface 13 and the liquid guide inclined surface 14, that is, the included angle B indicated in the figure is 8-12°.

The width of the functional side 13 is 0.5-1.5 mm, which can ensure the grinding efficiency of the end face of the journal and the service life of the grinding wheel.

The fine-grained grinding layer 2 adopts B213 abrasive, and the coarse-grained grinding layer 3 adopts B251 abrasive. The two selected abrasives can better meet the processing requirements of different parts on the crankshaft journal, ensure the processing quality, and help to improve The service life of the grinding wheel.

Claims (4)

1. electroplating CBN emery wheel is used in a kind of crankshaft journal processing, it is characterised in that including discoid metallic matrix (1), fine grained It is convex that two circle arcs are arranged with periphery at grinding layer (2) and coarse granule grinding layer (3), metallic matrix (1) exterior angle Rise (11), the ring-shaped platform (12) of two evaginations, the ring-shaped platform are arranged with the side at metallic matrix (1) exterior angle (12) merged with arc convex (11) in edge, surface smoothly transits, the top planes of ring-shaped platform (12) are function side (13), medial surface is metallic matrix (1) periphery between a drain inclined-plane (14) extended obliquely downward, two arc convex (11) For function end face (15), fine grained grinding layer (2), function are attached with arc convex (11) surface and function end face (15) Coarse granule grinding layer (3) is attached with (13) sideways.

2. electroplating CBN emery wheel is used in crankshaft journal processing as claimed in claim 1, it is characterised in that the function side (13) Angle with drain inclined-plane (14) is 8~12 °.

3. electroplating CBN emery wheel is used in crankshaft journal processing as claimed in claim 1, it is characterised in that the function side (13) Width be 0.5~1.5mm.

4. electroplating CBN emery wheel is used in the crankshaft journal processing as described in any one in claims 1 to 3, it is characterised in that described Fine grained grinding layer (2) uses B213 abrasive materials, and coarse granule grinding layer (3) uses B251 abrasive materials.