CN101413464A

CN101413464A - Method for manufacturing and mounting assembled cylinder cap spray pipe and specific bending tool

Info

Publication number: CN101413464A
Application number: CNA2008101288716A
Authority: CN
Inventors: 陈焕春
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-12-06
Filing date: 2006-12-06
Publication date: 2009-04-22
Anticipated expiration: 2026-12-06
Also published as: CN101413464B

Abstract

The invention relates to a method for manufacturing and mounting a spray water pipe of an assembled type cylinder cover and a special bending tool. A straight spray water pipe is subjected to quench annealing treatment; the treated spray water pipe is arranged in a hole which is positioned on the cylinder body and is vertically intersected with a water inlet hole; the spray water pipe is fixed through flanges on the end of the spray water pipe by a cone in front of a plug and the conical surface of the hole; the spray water pipe is bent along a circular groove on the outer walls of exhaust ports through the special bending tool which is arranged on the cylinder cover body and is used as a sand cleaning hole, so that an outlet on the other end of the spray water pipe is opposite to a gutter waterway between two exhaust ports on the cylinder cover body; and a hole which is positioned on the fixed end of the spray water pipe, is coaxial with the water inlet hole on the cylinder cover body and has the same size as the water inlet hole is drilled through. The spray water pipe has the advantages that the spray water pipe is processed and mounted by a machining method so that the spray water pipe has accurate position and good water flow effect. The mounted spray water pipe is easy to reach 100 percent of finished product rate, thoroughly avoids waste products caused by embedding the spray water through casting, and can generate huge economic benefit for the cylinder cover with high value.

Description

The manufacturing of assembled cylinder cap spray pipe, installation method and specific bending tool

Technical field

The present invention relates to internal combustion engine component, especially cylinder head.

Background technique

At present heavy duty mostly is a cylinder with a cylinder head, and the air inlet of two suction valves control intake ducts and the exhaust that two outlet valves are controlled air outlet flues are arranged on the cylinder head.During internal combustion engine, high temperature, high pressure when cylinder head will be born the combustion gas outburst, therefore in the design of cylinder head, to take into full account its mechanical stress of bearing and thermal stress, is furnished with the cooling system that adapts, the temperature of the reduction cylinder head of maximum capacity, the temperature between two outlet valve place two relief opening walls particularly, this also is the highest place of entire cylinder head thermal stress, requires cooling water at first to arrive waterway between the two relief opening walls.Way is that the pipe of using the water inlet with cylinder head to intersect vertically directly is directed to this waterway to water, and China's internal-combustion engine of being used for railway locomotive mainly contains 240 serial diesel engines at present.Wherein the status requirement water inlet of 12V240ZJ cylinder of diesel engine lid water inlet to the outlet that just can make shower after the shower of passage between the relief opening will be walked around the relief opening outer wall to waterway, therefore shower is the pipe that circular arc is arranged, and can't be contained in the pipe that circular arc is arranged that processes the place, water inlet of cylinder lid.Way in the past is to cast out shower in advance at cylinder lid water inlet position, is referred to as to bury pipe.Promptly when the casting process moulding, the steel shower two ends of moulding are blocked with molding sand, be embedded in the shower position of cylinder lid sand mold, the water inlet nose end of shower is encased by the external wall of cylinder head, remove the molding sand at shower two ends behind the cylinder lid casting, during machining cylinder lid water inlet shower is drilled through.Find that in actual production this production technology reject rate is higher, reason is: 1, the molding sand of stifled shower easily creeps into molten iron when high temperature liquid iron is poured into a mould, and stops up or the local shower ， Qie Cheongju sand difficulty of stopping up, and is difficult for checking; 2, the position casting accuracy of shower is low, and cylinder lid intake pipe and shower intersect bad when causing machining; Steel shower and the external wall junction point of cylinder head easily produce casting defect when 3, casting.Preceding two kinds of phenomenons cause the shower water flowing not smooth, and the third phenomenon causes the cylinder head leakage of cooling water, all are unallowable for cylinder head.Want to overcome the above problems, need take the input of higher technological measure and cost during casting, wanting to reach 100% finished product also is the comparison difficulty.

Summary of the invention

The objective of the invention is to overcome the defective of prior art, a kind of manufacturing, installation method of assembled cylinder cap spray pipe are provided, reach specific bending tool, the technology of the casting shower that reject rate was high before can thoroughly abolishing realizes the accurate by dress of shower with the method for assembling.

The technical solution adopted for the present invention to solve the technical problems is: assembled cylinder cap spray pipe is made up of screw plug, shower, cylinder lid.The shower that copper tube is made is contained in the hole that intersects vertically with the water inlet on the cylinder lid, flange by shower one end is fixed shower with the cone of screw plug front and the conical surface in hole, the exhaust armatine outer wall arc groove of circular arc on the shower and cylinder lid coincide, the inclined-plane of the other end is vertical with the plane at shower circular arc portion axis place, and outlet is the waterway between the two relief opening walls on to the cylinder lid; The shower fixed end has with coaxial and measure-alike hole, the enterprising water hole of cylinder lid and shower endoporus and intersects.

By its length of run blanking, an end is with pressing stone roller method flange the shower raw material copper tube of choosing in elder generation, and the other end processes the inclined-plane, and the shower quench annealing is handled.Shower after handling is contained in the hole that intersects vertically with the water inlet on the cylinder lid, with the cone of screw plug front and the conical surface in hole shower is fixed, the inclined-plane that makes the other end is vertical with the plane at the circular arc portion axis place that shower will form, knock an end of specific bending tool with hammer by the Cheongju sand hole on the cylinder lid, the arc groove consistent with the shower external diameter of the other end of bending tool forces the arc groove bending of shower along exhaust armatine outer wall, and the outlet that makes shower is the waterway between the two relief opening walls on to the cylinder lid; Drill through shower fixed end and coaxial and measure-alike hole, the enterprising water hole of cylinder lid.

The specific bending tool that shower is installed is a long and thin metal round bar, and the angle of one end and axis is 45 °, and having with the end face transverse above is axis, the arc groove that diameter is consistent with the shower external diameter, and there is rounded corner at the two ends of groove.

The advantage of this assembled cylinder cap spray pipe is: owing to process, shower is installed with the method for machining, make the shower position accurate, water flowing is effective.The shower of installing can be easy to reach 100% yield rate, has thoroughly avoided burying the waste product that shower causes with casting.This can produce bigger economic benefit for costly cylinder head.

Description of drawings

Below in conjunction with accompanying drawing the present invention is further described.

Accompanying drawing 1 is the erection drawing of assembled cylinder cap spray pipe.Fig. 2 is the sectional view of Fig. 1 YanA-AChu, and Fig. 3 is the sectional view of Fig. 1 YanB-BChu.

Among the figure 1, screw plug, 2, shower, 3, the cylinder lid, 4, bending tool, 5, the exhaust armatine, 6, the Cheongju sand hole, 7, relief opening second, 8, the water inlet.

Embodiment

With reference to accompanying drawing, because the position of water inlet 8 can not connect with straight line to the waterway between the two relief opening outer walls on the cylinder lid 3, so straight tube can't be installed, we fold shower 2 needed circular arcs after just straight tube being installed again, and this will take some technological measures.1, cast out and the corresponding arc groove of shower 2 external diameters at exhaust armatine 5 outer walls, consider that the casting position and the dimensional accuracy that reach are not high, can be big 0.5～1.5 millimeter ratio shower 2 external diameters that the arc diameter of groove designs.2, select for use copper tube to do shower and soften processing, help the bending of pipe.3, adopt an end that the bending tool of the arc groove consistent with shower 2 external diameters is arranged.After so just accomplishing to load onto straight shower earlier, the convenient and reliable bending work of finishing.

Specific practice is: by its length of run blanking, the other end processes the inclined-plane the shower raw material copper tube of choosing, and for saving the angle cut-out that material can directly be pressed inclined-plane and pipe when the blanking, processes the inclined-plane of two showers 2 simultaneously.Pipe is clipped on the main shaft of lathe and rotates, entering straight end endoporus with the cone instrument becomes the inside and outside conical surface by pressing to grind nose end enlarged, and is referred to as flange.1.5～3 millimeters of flange length, the cone angle of formation is identical with the cone angle of screw plug 1 front cone.Shower 2 semi-finished product quench annealings are handled, promptly cooled off putting into cold water after the copper tube heating, copper tube will deliquescing.Shower 2 semi-finished product after handling are fixed in the hole that intersects vertically with water inlet 8 on the cylinder lid 3, make the inclined-plane of the other end vertical with the plane at circular arc portion axis place that shower 2 is rolled over.Flange by shower 2 is fixing with shower 2 with the inner conical surface in the cone of screw plug 1 front and hole, and is water-tight for guaranteeing shower 2 installation positions, and the screw that requires to install on the cylinder lid 3 screw plug 1 is 0.03 millimeter of φ to the coaxality tolerance of its inner conical surface.The outside thread of screw plug 1 is 0.03 millimeter of φ to the coaxality tolerance of the cone of its front.Knock an end of specific bending tool 4 (representing with two-dot chain line in the accompanying drawing) by the 6 usefulness hammers of the Cheongju sand hole on the cylinder lid 3, the arc groove consistent with shower 2 external diameters of the other end of specific bending tool 4 forces the groove gradually bending of shower 2 along exhaust armatine 5 outer walls, and the other end outlet that makes shower 2 is the waterway between exhaust armatine 5 and relief opening second 7 walls on to cylinder lid 3; Drill through coaxial and measure-alike hole, water inlet on shower 2 fixed ends and the cylinder lid 38.

Specific bending tool is a long and thin metal round bar, and its external diameter is Bi little many of Cheongju sand hole 6, in order the operation when installing, observe convenient.The angle of one end and axis is 45 °, and having with the end face transverse above is axis, the arc groove that diameter is consistent with the shower external diameter, and there is rounded corner at the two ends of groove.The carbon constructional quality steel manufacturing that specific bending tool 4 usefulness can be heat-treated, after diffusion zone, the hardness at the two ends of specific bending tool reaches 40～50HRC.The assembled cylinder cap spray pipe of new structure is through facts have proved more than a year: product is made up-to-standard rate and is reached 100%, cylinder head installation test examination, and performance adheres to specification fully.

Claims

1, a kind of manufacturing of assembled cylinder cap spray pipe, installation method, it is characterized in that: earlier shower (2) the raw material copper tube of choosing is pressed its length of run blanking, with end pressure stone roller method flange, the other end processes the inclined-plane, it is characterized in that: shower (2) quench annealing is handled, shower (2) semi-finished product after handling are fixed on cylinder lid (3) with screw plug (1) to be gone up in the corresponding hole, the inclined-plane that makes the other end is vertical with the plane at the circular arc portion axis place that shower (2) will form, knock an end of specific bending tool (4) with hammer by the sand removal hole (6) on the cylinder lid (3), the spill arc groove consistent with shower (2) external diameter of the other end of specific bending tool (4) forces the arc groove bending of shower (2) along exhaust armatine (5) outer wall, the outlet that makes shower (2) drills through shower (2) fixed end and goes up coaxial and measure-alike hole, water inlet (8) with cylinder lid (3) to the waterway between the last two relief opening walls to cylinder lid (3).

2, manufacturing, the specific bending tool in the installation method (4) of the described assembled cylinder cap spray pipe of realization claim 1 are long and thin metal round bars, it is characterized in that: the angle of one end and axis is 45 °, having with the end face transverse above is axis, diameter and the consistent arc groove of shower (2) external diameter, there is rounded corner at the two ends of groove.

3, specific bending tool according to claim 2 (4) is characterized in that: specific bending tool (4) is used the carbon constructional quality steel manufacturing, its two ends heat treatment hardness 40～50HRC.