Positioning fixture for machining inclined surface of connecting rod

Abstract

The invention discloses a positioning fixture for machining an inclined surface of a connecting rod, which comprises a positioning pin and a positioning block. A hole positioning mechanism is arranged on the positioning block and used for rotatably positioning the connecting rod in a horizontal plane by the aid of upper surfaces of the positioning pin and the positioning block after being matched with a hole at the head of the connecting rod. When the positioning fixture is used, the surface of the head of the connecting rod contacts with the upper surface of the positioning block, the hole at the head of the connecting rod is matched with the hole positioning mechanism, and the other end of the connecting rod is abutted to the positioning pin, so that the connecting rod is rotatably positioned in the horizontal plane. At the moment, the feed direction of a milling cutter is opposite to the acting force of the positioning pin to the connecting rod, and the milling cutter can be used for milling after tool setting and alignment to machine the needed inclined surface of the connecting rod. The positioning fixture is used for positioning the connecting rod through the positioning pin, the upper surface of the positioning block and the hole positioning mechanism, positioning for the connecting rod is reliable during milling, and the connecting rod is difficult to shift even if the cutting force of the milling cutter to the connecting rod is large, so that machining precision of the inclined surface of the connecting rod is improved.

Description

technical field [0001] The invention relates to the technical field of mechanical manufacturing and processing, in particular to a positioning tool for processing the slope of a connecting rod. Background technique [0002] A connecting rod is a bar whose two ends are respectively hinged to the driving part and the driven part to transmit motion and force. As a common component in mechanical transmission assembly, the demand for connecting rods is increasing day by day, and people pay more and more attention to the processing of connecting rods. [0003] see figure 1 and figure 2 , figure 1 is the schematic diagram of the connecting rod, figure 2 It is a schematic structural diagram of a typical positioning tool for machining connecting rod slopes. [0004] Such as figure 1 As shown, the connecting rod head usually has a connecting rod bevel 11, and the machining of the connecting rod bevel 11 is usually done by a milling operation. Such as figure 2 As shown, the ...

AI Technical Summary

Problems solved by technology

However, in the process of milling the connecting rod by the milling cutter, the cutting force applied by the milling cutter to the connecting rod is usually relatively large, which causes the displacement of the connecting rod and reduces the machining accuracy of the inclined surface 11 of the connecting rod.

[0006] On the other hand, when the connecting rod slope 11 is processed in batches, each connecting rod needs to be marked, fixed, and aligned. The entire production chain is long, resulting in long processing time, low work efficiency, and labor costs. higher

At the same time, the above-mentioned frequent operations have increased the labor intensity of workers and affected their health.

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