It is a kind of to fire the lubricating oil pump control mechanism method with closure shell againTechnical field
The lubricating oil pump control mechanism method with closure shell again is fired the present invention relates to a kind of, belongs to housing mounting technology field.
Background technology
The housing for firing lubricating oil pump control mechanism is made up of governor body and case cover, during overhaul, often due to closure shell abrasion or the faying face being engaged with governor body have wound, it is impossible to ensure sealing, it is therefore desirable to again with closure shell.Conventional process flow is that then pad is sub again, it is ensured that final matching requirements by hand with lead plug sub-aperture on governor body and case cover.However, the pinhole case cover matched somebody with somebody again in is inconsistent with pin coordinate on governor body, so as to cause Assembly Interference, it is impossible to complete assembling.
The content of the invention
The present invention provides a kind of process is simple, assembly precision combustion lubricating oil the pump control mechanism high method with closure shell again, so that ensure that governor body is qualified with the case cover assembling matched somebody with somebody again, to overcome the deficiencies in the prior art.
Technical scheme：It is a kind of to fire the lubricating oil pump control mechanism method with closure shell again, comprise the following steps：
（1）The center in the machined hole of any two first on accurate measurement governor body on three-coordinates measuring machine, then using two lines of centres in machined hole as Y-axis, using the center in one of them machined hole as the origin of coordinates, using through the origin of coordinates and the straight line vertical with Y-axis as X-axis, rectangular coordinate system is set up, the actual coordinate value of pin on governor body is measured in this sets up rectangular coordinate system；
（2）To be fixed on the workbench of vertical machining centre with the closure shell made with governor body, two machined holes corresponding with governor body are found out in closure shell, then according to step（1）Method and set up and step with the two machined holes（1）Identical rectangular coordinate system, then according to step（1）The actual coordinate value of the pin for drawing finds out the coordinate value of corresponding pin hole in the rectangular coordinate system, and the coordinate value according to the pin hole found out carries out roughing in closure shell to pin hole；
（3）Closure shell is transferred on three-coordinates measuring machine, the coordinate value of the pin hole after repetition measurement roughing on three-coordinates measuring machine, the coordinate value of the pin hole is compared with the actual coordinate value of pin on governor body, if coordinate value difference is within the scope of the maximum allowance of pin hole, pin hole can be finished and be molded；
（4）In vertical machining centre by the pin hole machine-shaping in closure shell, then closure shell is fastened on governor body, pin is finally pressed into pin hole.
In the above method, before vertical machining centre processing pinhole, the faying face being engaged with governor body come centering closure shell by paving the method for low spot makes the flatness of the faying face in closure shell be less than 0.02mm.
Due to using above-mentioned technical proposal, the advantage of the invention is that：The present invention on governor body and closure shell by setting up identical rectangular coordinate system, so just can be by pin actual coordinate value on governor body excessively in the rectangular coordinate system set up in the closure shell, obtain the coordinate value of pin hole in closure shell, so just the coordinate value of the pin hole can be imported vertical machining centre, by vertical machining centre by pin hole machine-shaping.Therefore, the pin hole for being processed in closure shell by the method for the present invention can with the pin perfect cooperation on governor body, so as to improve assembly precision again, it is ensured that the qualification rate of governor body and the case cover assembling matched somebody with somebody.
Brief description of the drawings
Fig. 1 is the structural representation of governor body in the present invention；
Fig. 2 is the structural representation of case cover in the present invention.
Description of reference numerals：The machined holes of 1- first, the machined holes of 2- second, the pins of 3- first, the pins of 4- second, 5- governor bodies, the machined holes of 6- the 3rd, the machined holes of 7- the 4th, the pin holes of 8- first, the pin holes of 9- second, 10- case covers.
Specific embodiment
In order that the object of the invention, technical scheme and advantage are clearer, the present invention is described in further detail with reference to the accompanying drawings and examples.
Embodiments of the invention：Combustion lubricating oil pump control mechanism matches somebody with somebody the method for closure shell again, comprises the following steps：
（1）The center in the first machined hole 1 and the second machined hole 2 first on accurate measurement governor body 5 on three-coordinates measuring machine, then using the line of centres in the first machined hole 1 and the second machined hole 2 as Y-axis, using the center in the second machined hole 2 as the origin of coordinates, using through the origin of coordinates and the straight line vertical with Y-axis as X-axis, rectangular coordinate system is set up, the actual coordinate value of the first pin 3 and the second pin 4 on governor body 5 is measured in this sets up rectangular coordinate system；
（2）To be fixed on the workbench of vertical machining centre with the closure shell 10 made with governor body 5, the 3rd machined hole 6 corresponding with governor body 5 and the 4th machined hole 7 are found out in closure shell 10, then according to step 1 method and set up and step with the 3rd machined hole 6 and the 4th machined hole 7（1）Identical rectangular coordinate system, further according to step（1）The first pin 3 and the actual coordinate value of the second pin 4 that draw find out the coordinate value of the pin hole 9 of corresponding first pin hole 8 and second in the rectangular coordinate system, and the coordinate value according to the pin hole found out carries out roughing in closure shell to pin hole；Before vertical machining centre processing pinhole, by the faying face for paving the method for low spot and being engaged with governor body 5 come centering closure shell 10, the flatness of the faying face in closure shell 10 is set to be less than 0.02mm, it is ensured that the sealing property after closure shell 10 and the assembling of governor body 5.
（3）Closure shell 10 is transferred on three-coordinates measuring machine, the coordinate value of the first pin hole 8 and the second pin hole 9 after repetition measurement roughing on three-coordinates measuring machine, the coordinate value of the pin hole 9 of the first pin hole 8 and second is compared with the actual coordinate value of the first pin 3 and the second pin 4 on governor body 5, if coordinate value difference is within the scope of the maximum allowance of the first pin hole 8 or the second pin hole 9, the first pin hole 8 or the second pin hole 9 can be finished shaping；
（4）In vertical machining centre by the first pin hole 8 in closure shell 10 and the machine-shaping of the second pin hole 9, then closure shell 10 is fastened on governor body 5, is finally respectively pressed into pin in the first pin hole 8 and the second pin hole 9.