CN202447722U

CN202447722U - Alignment die

Info

Publication number: CN202447722U
Application number: CN2012200856102U
Authority: CN
Inventors: 陈硕
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-03-07
Filing date: 2012-03-07
Publication date: 2012-09-26
Anticipated expiration: 2022-03-07

Abstract

An alignment die for drilling guide post holes in an air cylinder cover adopts a pattern element consistent with a mark datum of a product pattern size as a positioning datum of the alignment die for drilling the guide post holes in the air cylinder cover. The alignment die comprises a rhombic pin, a plate, an alignment post and a circular positioning pin, wherein the rhombic pin is mounted in a hole in the upper side of the plate; the alignment post is mounted in a hole in the middle of the plate; the circular positioning pin is mounted in a hole in the lower side of the plate; the axial lines of the rhombic pin, the alignment post and the circular positioning pin are positioned in the same plane and parallel to one another; the rhombic pin and the circular positioning pin are respectively mounted in air valve guide pipe mounting holes in an air cylinder cover; and the distance between the axial line of the rhombic pin and the axial line of the alignment post is the same as that between the axial line of the circular positioning pin and the axial line of the alignment post. The guide post holes are processed in the midpoints of an upper guide pipe mounting hole and a lower guide pipe mounting hole of the air cylinder cover by the alignment die, the alignment die is reasonable in positioning, high in precision, and convenient in operation during processing, and moreover, the drilling position precision and the drilling size precision are high.

Description

The centering mould

Affiliated technical field

This practical sexual type relates to mechanical processing technique equipment, especially centering mould.

Background technology

At present heavy duty mostly be a cylinder with a cylinder head, a lot of individual holes are arranged on the upper face of cylinder head.In the past, a plurality of drill jig processing of these Kong Yaoyong, cumbersome, the location of drill jig is unreliable.Wherein the position of guide pillar installing hole is at the mid point of two conduit installing holes up and down, its size and position accuracy demand height, and the requirement of product design document can not be satisfied in the hole that processes with drill jig.

Summary of the invention

The purpose of this practical sexual type is the defective that overcomes prior art, provides a kind of cylinder head to bore guide pillar hole centering mould.

The purpose of this practical sexual type realizes as follows: adopt the pattern element consistent with product design document size marking benchmark to bore the positioning reference of guide pillar hole centering mould as cylinder head.The position in guide pillar hole is that the positioning reference of centering mould is exactly two conduit installing holes of cylinder head by the determining positions of cylinder head conduit installing hole.

Cylinder head is bored guide pillar hole centering mould and is comprised rhombus pin, plate, centering post and circle alignment pin.The rhombus pin is contained in the hole of plate top; The centering post is contained in the hole in the middle of the plate; The circle alignment pin is contained in the following hole of plate; The axis of rhombus pin, centering post and circle alignment pin is in same plane and be parallel to each other, and the rhombus pin is contained in respectively in the valve guide bushing installing hole of cylinder head with the circle alignment pin, and the rhombus pin axis equates with the distance of circle alignment pin axis to the centering mast axis to the distance of centering mast axis.

Rhombus pin, centering post and circle alignment pin heat treatment 58～62HRC.

The advantage that this cylinder head is bored guide pillar hole centering mould is: the location is reasonable, and precision is high.Easy to operate in the time of processing, the position of boring and dimensional accuracy are high.

Description of drawings

Below in conjunction with accompanying drawing this practical sexual type is further described.

Accompanying drawing is the installation diagram that cylinder head is bored guide pillar hole centering mould.Fig. 1 is a front view, and Fig. 2 is the cutaway view of Fig. 1 along A-A, and Fig. 3 is the cutaway view of Fig. 2 along B-B.

1. cylinder head among the figure, 2. rhombus pin, 3. plate, 4. the centering post is 5. justified alignment pin.

The specific embodiment

Accompanying drawing is the installation diagram that 16V240ZJ cylinder cover for diesel engine (1) bores guide pillar hole centering mould.

With reference to accompanying drawing, the diameter of the conduit installing hole of 16V240ZJ cylinder cover for diesel engine (1) is that 28 millimeters guide pillar bore dias are 22 millimeters, 104 ± 0.2 millimeters centres that require the guide pillar hole at homonymy two guide holes of the distance of homonymy two guide holes.The conduit installing hole must be with the combustion front processing of its coaxial valve seat insert hole from cylinder head (1), and the guide pillar hole then will be from the another side processing of cylinder head (1).According to the operation principle of cylinder head (1), the guide pillar hole of homonymy is associated with the conduit installing hole.The position in guide pillar hole is that the positioning reference of aligning tool is exactly two conduit installing holes of cylinder head (1) by the determining positions of cylinder head (1) conduit installing hole, can adopt the positioning forms of the two pins of one side commonly used.Cylinder head (1) is bored guide pillar hole aligning tool, comprises rhombus pin (2), plate (3), centering post (4) and circle alignment pin (5).Rhombus pin (2) is contained in the hole of plate (3) top with the cylinder of its small end, and the central plane of two column parts that cooperate with associated orifices of rhombus pin (2) is vertical with the plane at circle alignment pin (5) axis place with rhombus pin (2).Centering post (4) is contained in the middle hole of plate (3) with the cylinder of its small end, and circle alignment pin (5) is contained in the following hole of plate (3) with the cylinder of its small end.The axis of rhombus pin (2), centering post (4) and circle alignment pin (5) is in same plane and be parallel to each other, and rhombus pin (2) is contained in respectively in the valve guide bushing installing hole of cylinder head (1) homonymy with circle alignment pin (5).According to pattern requirement, rhombus pin (2) axis equates with the distance of circle alignment pin (5) axis to centering post (4) axis to the distance of centering post (4) axis.Like this hole of processing just about the point midway of two conduit installing holes.In order to prolong the service life of aligning tool, rhombus pin (2), centering post (4) and circle alignment pin (5) heat treatment 58～62HRC.

Claims

1. centering mould; Comprise rhombus pin, plate, centering post and circle alignment pin, it is characterized in that: the rhombus pin is contained in the hole of plate top, and the centering post is contained in the hole in the middle of the plate; The circle alignment pin is contained in the following hole of plate; The axis of rhombus pin, centering post and circle alignment pin is in same plane and be parallel to each other, and the rhombus pin is contained in respectively in the valve guide bushing installing hole of cylinder head with the circle alignment pin, and the rhombus pin axis equates with the distance of circle alignment pin axis to the centering mast axis to the distance of centering mast axis.

2. centering mould according to claim 1 is characterized in that: said rhombus pin, centering post and circle alignment pin heat treatment 58～62HRC.