Method for machining high-position-precision deep hole in connection rod of diesel engine

A diesel engine, high-position technology, applied in the field of mechanical processing, can solve the problems of low tool feed rate, low processing efficiency, large amount of manual grinding and polishing, etc., and achieve the effect of simple principle and high efficiency

Active Publication Date: 2016-07-06
SHANNXI DIESEL ENGINE HEAVY IND
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Problems solved by technology

Although this method can ensure the position accuracy of the hole, because the material selected for the connecting rod has good toughness, the iron filings generated by the gun drill are relatively long, which is easy to strain the processed bolt hole and cannot reach the surface roughness of Ra3.2. It is required that the bolt holes can only be polished by hand after the gun drilling process. The specific method is: hold a round rod with a hand electric drill, slot the head of the round rod, wrap the emery cloth in the groove, and put the round rod into t

Method used

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Embodiment Construction

[0024] An embodiment of the present invention is described below.

[0025] The method for machining deep holes with high position accuracy on connecting rods of diesel engines comprises the following steps:

[0026] 1) Choose a horizontal machining center with internal cooling function, and the pressure of the internal cooling function is required to reach more than 40kg;

[0027] 2) Fixtures are installed on the workbench of the horizontal machining center, and the connecting rod of the diesel engine is installed on the fixture and clamped after accurate positioning;

[0028] 3) First use the center drill to process four center holes on the connecting rod of the diesel engine according to the process size requirements, then use the φ20mm drill bit to process four shallow holes with a depth of 25mm using the center hole as a guide hole, and finally use a boring tool to drill the four shallow holes. The diameter of the hole is bored to φ20.3mm;

[0029] 4) Use a gun drill to ...

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Abstract

The invention provides a method for machining a high-position-precision deep hole in a connection rod of a diesel engine. Bolt holes are firstly machined by adopting a gun drill so that position precision between the holes is guaranteed; and the bolt holes are machined to technically required sizes by utilizing a reamer and the surface roughness of the holes is guaranteed, so that the quality and machining efficiency of products are guaranteed. With the adoption of the method provided by the invention, manual polishing does not need to be carried out again, so that procedures and labor cost are saved and the working efficiency is extremely improved; and the method has a very high practical value.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a method for processing deep holes with high position precision on connecting rods of diesel engines. Background technique [0002] There are 4 bolt holes on the connecting rod of a certain type of diesel engine. The hole diameter is φ20.6mm and the hole depth is 192mm. The outlets are all within ±0.05mm. The existing processing method is: the equipment uses a horizontal machining center, the machining center has an internal cooling function, and the pressure must reach 40Kg, install a fixture on the workbench of the horizontal machining center, and install the connecting rod. To the fixture, after the positioning is accurate, clamp it. Before processing with a gun drill, first use a center drill to process four center holes on the connecting rod, then use a φ20mm drill to process four shallow holes with a depth of 25mm, and then use a boring tool to bo...

Claims

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Application Information

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IPC IPC(8): B23B35/00B23P15/00
CPCB23B35/00B23P15/00
Inventor 王红新张帅军邢立莉
Owner SHANNXI DIESEL ENGINE HEAVY IND
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