CN102476196A - Engine valve guide pipe machining tool and method - Google Patents

Abstract

The present invention discloses a tool for machining an engine valve guide, comprising a tool body, a slider fixedly mounted on the tool body, a blade fixedly mounted in the slider, a positioning shaft arranged at one end of the tool body, and the other end connected to a power transmission shaft. The present invention also provides a method for machining an engine valve guide using the tool. Compared with the prior art, the present invention effectively ensures the coaxiality of the inner hole of the valve guide and the outer circle of the oil seal installation of the machined valve guide by arranging the positioning shaft in the tool body.

Description

Tool and method for machining engine valve guide

technical field

The invention relates to a metal cutting tool and a method, in particular to a tool and a processing method for processing an engine valve guide.

Background technique

In the existing machining process of the inner hole of the valve guide of the engine cylinder head, the machining of the inner hole of the guide tube and the machining of the guide installation hole are not in the same process. Due to the impact of two positioning and two clamping, the position of the inner hole of the conduit and the installation hole of the conduit will affect the misalignment between the inner hole of the conduit and the outer circle of the conduit oil seal installation. Excessive misalignment will affect the sealing performance of the valve oil seal, resulting in high engine oil consumption and carbon deposits.

At present, the machining of the inner hole of the engine valve guide adopts the pin hole positioning of the cylinder head. Since there is a position error between the inner hole of the guide tube and the pin hole of the cylinder head, and there is also a position error between the guide hole and the pin hole, the overlap of the two position errors will cause the coaxiality of the inner hole of the guide tube and the outer circle of the oil seal installation of the guide tube too big.

Contents of the invention

The technical problem to be solved by the present invention is to provide an engine valve guide processing tool to improve the coaxiality of the inner hole of the guide tube and the outer circle on which the oil seal of the guide tube is installed.

In order to solve the above technical problems, the valve guide processing tool provided by the present invention has the following structure:

A tool for processing an engine valve guide, comprising a turning tool body, a slider is fixedly installed on the turning tool body, a blade is fixedly installed in the slider, one end of the turning tool body is provided with a positioning shaft, and the other end is connected to a power transmission shaft connected.

Preferably, a groove is provided on the turning tool body, and the slider is installed in the groove and fixed by screws.

Preferably, the turning tool body is further provided with screws for fine adjustment of the position of the slider.

Preferably, the blade is a cemented carbide blade.

Preferably, a slot is provided in the slider, and the blade is set in the slot and fixed by a locking screw.

Preferably, a universal joint is installed on the other end of the turning tool body, and the universal joint is connected with a radial drill handle.

The present invention also provides a method for processing the engine valve guide by using the above tool, comprising the following steps:

1. Press the valve guide into the cylinder head;

2. Process the inner hole of the valve guide, and reserve the margin for further processing at the outer circle of the oil seal installation;

3. Determine the diameter of the outer circle of the valve guide to be processed;

4. Adjust the position of the blade in the valve guide processing tool according to the determined outer diameter of the valve guide;

5. Insert the positioning shaft of the valve guide processing tool into the inner hole of the valve guide to be processed, and start the processing tool to complete the processing of removing the outer circle margin of the oil seal installation and correcting the coaxiality between the inner hole of the guide tube and the outer circle of the installation.

Compared with the prior art, the present invention effectively guarantees the coaxiality of the inner hole of the guide tube of the processed valve guide and the outer circle of the oil seal by setting the positioning shaft in the turning tool body.

Description of drawings

Fig. 1 is the sectional view of processing tool among the present invention;

Fig. 2 is the structural representation of the turning tool body in the processing tool of the present invention;

Fig. 3 is a sectional view of a slider in the machining tool of the present invention.

The notations used in the above figures are:

1-turning tool body, 2-slider, 3-blade, 4-positioning shaft, 5-groove, 6-grooving, 7-fine-tuning screw.

Detailed ways

The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

As shown in Figures 1 to 3, the engine valve guide processing tool of the present invention includes a turning tool body 1, a groove 5 is arranged on the turning tool body 1, a slide block 2 is installed in the groove 5 and is locked by locking The screws are fixed. Wherein, the turning tool body 1 is also provided with fine adjustment screws 7 for adjusting the position of the slider 2 . A slot 6 is arranged in the slider 2, and a cemented carbide blade 3 is set in the slot 6, and is fixed by a locking screw. One end of the turning tool body 1 is provided with a positioning shaft 4, and the other end is provided with a universal joint, and the universal joint is connected with the handle of a radial drill.

The steps to use this tool to process the engine valve guide are:

1. Press the valve guide into the cylinder head;

2. Process the inner hole of the valve guide, and reserve the margin for further processing at the outer circle of the oil seal installation;

3. Determine the diameter of the outer circle of the valve guide to be processed;

4. Adjust the position of the blade in the valve guide processing tool according to the determined outer diameter of the valve guide;

5. Insert the positioning shaft of the valve guide processing tool into the inner hole of the valve guide to be processed, and start the rocker drill to complete the machining of removing the outer circle margin of the oil seal installation and correcting the coaxiality between the inner hole of the guide tube and the outer circle of the installation.

The invention changes the processing positioning method, and effectively ensures the coaxiality of the inner hole of the valve guide and the outer circle of the oil seal by setting the positioning shaft in the cutter.

The above disclosure is only a specific embodiment of the present invention, however, the present invention is not limited thereto, and any changes conceivable by those skilled in the art shall fall within the protection scope of the present invention.

Claims (7)

1. an engine valve guide process tool comprises the lathe tool body, is installed with a slide block on the said lathe tool body, is installed with blade in the slide block, it is characterized in that, an end of said lathe tool body is provided with locating shaft, and the other end is connected with power transmission shaft.

2. engine valve guide process tool according to claim 1 is characterized in that, said lathe tool body is provided with a groove, and said slide block is installed in this groove and through screw and is fixed.

3. engine valve guide process tool according to claim 2 is characterized in that, also is provided with on the said lathe tool body to be used for screw that the slide position is finely tuned.

4. engine valve guide process tool according to claim 3 is characterized in that, said blade is a carbide chip.

5. engine valve guide process tool according to claim 4 is characterized in that, is provided with a fluting in the said slide block, and said blade is set in this fluting, and is able to fix through lock-screw.

6. engine valve guide process tool according to claim 5 is characterized in that the other end of said lathe tool body is equipped with universal joint, and said universal joint is connected with the radial drill handle of a knife.

7. an engine valve guide processing method is characterized in that, the employed cutter of said processing method is the arbitrary described process tool of aforementioned claim 1-6, and this processing method comprises the steps:

Valve guide bushing is pressed fit in the cylinder head;

Processing valve guide bushing endoporus, and at oil sealing the cylindrical place is installed and retains the surplus of doing further processing;

Confirm to need to process the diameter of the valve guide bushing cylindrical that obtains;

Position according to blade in the determined valve guide bushing outside diameter adjustment valve guide bushing machining tool;

The locating shaft of valve guide bushing machining tool is inserted in the valve guide bushing endoporus to be processed, and starts machining tool and accomplish the processing of removing oil sealing installation cylindrical surplus and revising the valve guide bushing endoporus and outer circles is installed.

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