CN211262718U

CN211262718U - Test block for heat-resistant iron castings in turbocharger

Info

Publication number: CN211262718U
Application number: CN201921956784.XU
Authority: CN
Inventors: 陈友三; 陈常彬; 杨国政; 孙宁; 任鹏宇; 张连魁; 杜康
Original assignee: Tianjin Dashiang Precision Industrial Co ltd
Current assignee: Tianjin Dashiang Precision Industrial Co ltd
Priority date: 2019-11-13
Filing date: 2019-11-13
Publication date: 2020-08-14
Anticipated expiration: 2029-11-13

Abstract

A test block for refractory iron castings in turbochargers comprising: the test block is used for measuring shrinkage porosity of the umbilical and the flange in the turbocharger, and the test block large flange and the test block small flange are respectively sleeved at the two ends of the test block, wherein the test block is cylindrical, the two ends of the test block are respectively provided with through holes for inserting the test block large flange and the test block small flange, and a plurality of test blocks are arranged around the test block to form a single-group umbilical. The utility model not only solves the shrinkage porosity problem of the heat-resistant cast iron piece, namely the umbilical and the flange in the turbocharger, but also increases the accuracy of the simulation of the heat-resistant cast iron of the turbocharger; in addition, the frequency of development trial-manufacture of products such as a turbine shell, a connected exhaust pipe and the like in the turbocharger is greatly reduced, and the product development period is shortened.

Description

Test block for heat-resistant iron castings in turbocharger

Technical Field

The utility model relates to a turbo charger especially relates to a test block that is arranged in turbo charger heat-resisting ironcasting. Belongs to the field of mechanical casting.

Background

At present, a turbocharger is taken as a deity for energy conservation and emission reduction commonly used in the automobile industry, and has a very important position. The quality requirements of the turbine shell, the exhaust pipe and the connected exhaust pipe which are main accessories of the turbocharger are extremely strict. The turbocharger provides power by absorbing high-temperature and high-pressure tail gas exhausted by an engine, so that the turbocharger casting has higher requirements on heat resistance and sealing performance. And because the turbocharger needs to be carried on an engine to work, the turbocharger casting needs to have a good fastening effect.

In order to meet the harsh work of the turbocharger casting, the problem of internal shortage of the turbocharger casting is taken as a most basic inspection item for judging whether the turbocharger casting is qualified or not. In the inspection of the internal defaults, the flange is used as a contact surface for communication between castings, and mainly plays a role in fastening and sealing; and the umbilicus serves as another fastening structure for the turbocharger casting. Most turbocharger castings have the umbilicus and the flange which have the same geometric shapes basically, the umbilicus is cylindrical, the flange is circular, but the sizes of the umbilicus and the flange are different, so that the geometric thermal junctions of the umbilicus and the flange are not nearly the same, and a plurality of variables are brought to the improvement of a casting process. Because the alloy content of the heat-resistant cast iron is high, the data volume of the heat-resistant cast iron of the turbocharger is not sufficient by the existing casting simulation Mige code software, and therefore, great uncertainty is often brought to the simulation result.

SUMMERY OF THE UTILITY MODEL

The main object of the present invention is to overcome the above disadvantages of the prior art, and to provide a test block for heat-resistant iron castings in turbochargers, which not only solves the shrinkage porosity problem of the heat-resistant iron castings, namely, the umbilicals and the flanges in turbochargers, but also increases the simulation accuracy of the heat-resistant iron castings in turbochargers; in addition, the frequency of development trial-manufacture of products such as a turbine shell, a connected exhaust pipe and the like in the turbocharger is greatly reduced, and the product development period is shortened.

The utility model aims at being realized by following technical scheme:

a test block for a heat-resistant iron casting in a turbocharger is characterized in that: the method comprises the following steps: the test block is used for measuring shrinkage porosity of the umbilical and the flange in the turbocharger, and the test block large flange and the test block small flange are respectively sleeved at the two ends of the test block, wherein the test block is cylindrical, the two ends of the test block are respectively provided with through holes for inserting the test block large flange and the test block small flange, and a plurality of test blocks are arranged around the test block to form a single-group umbilical.

The two ends of the test block are in a cylinder shape from big to small which is matched with the big flange and the small flange of the test block; and extends outwardly along the cylindrical test block.

The front surfaces of the large test block flange and the small test block flange are two cylinders respectively, and the cross sections of the large test block flange and the small test block flange are T-shaped.

The multiple test block single group umbilicals are symmetrically arranged around the test block or integrally formed around the test block.

The test block single group umbilical is provided with: the plurality of columns are respectively an upper umbilical and a left umbilical arranged on one side of the wall of the test block cylinder, and are oppositely arranged on a lower umbilical and a right umbilical which are opposite to the upper umbilical and the left umbilical; wherein, the upper umbilicus and the lower umbilicus in one group are cylinders; a group of rings which are respectively sleeved outside the left umbilical and the right umbilical.

The column extends outwards along the surface of the cylindrical test block.

The size of the test block single group of umbilicus is 15 mm; the length is 30 mm; the test block single group umbilicus is close to the large flange side of the test block of the first casting shell core.

The size of the test block single group of umbilicus is 15 mm; the length is 20 mm; the test block single group of umbilicals are close to the small flange side of the first casting non-shell core test block; the size of the test block single group of umbilicus is 20mm in diameter; the length is 30 mm; and is close to the large flange side of the second casting non-shell core test block.

The size of the test block single group of umbilicus is 20mm in diameter; the length is 20 mm; the test block single group of umbilicals is close to the small flange side of the test block of the shell core of the second casting.

The utility model has the advantages that: by adopting the technical scheme, the utility model not only solves the shrinkage porosity problem of the heat-resistant iron casting, namely the umbilical and the flange, in the turbocharger, but also increases the accuracy of simulation of the heat-resistant iron casting of the turbocharger; in addition, the frequency of development trial-manufacture of products such as a turbine shell, a connected exhaust pipe and the like in the turbocharger is greatly reduced, and the product development period is shortened.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the position and thin-wall section of a single umbilical member of the present invention;

FIG. 3 is a schematic view of the present invention on a molding board;

fig. 4 is a schematic diagram of the structure of the present invention on the casting and the casting mold-finishing flow path device.

The reference numbers in the figures illustrate:

1. a large test block flange; 2. the test block can be used for single group of umbilicus; 3. a test block small flange; 4. the upper position is the umbilicus; 5. the left umbilical position; 6. the lower umbilical cord is positioned; 7. the right umbilicus; 8. the wall of the test block cylinder; 9. a template middle plate; 10. a first casting non-shell core insert; 11. a first casting shell core insert; 12. a second casting non-shell core insert; a second casting shell core insert; 14. a casting mold finishing flow path device; 15. a first casting non-shell core; 16. a first casting shell core; 17. a second casting non-shell core; 18. a second casting shell core.

Detailed Description

As shown in fig. 1-2, the present invention includes: the test block is used for measuring shrinkage porosity of the umbilical and the flange in the turbocharger, and comprises a test block large flange 1 and a test block small flange 3 which are respectively sleeved at two ends of the test block, wherein the test block is cylindrical, two through holes for inserting the test block large flange 1 and the test block small flange 3 are respectively arranged at two ends of the test block, and a plurality of test blocks are arranged around the test block to form a single-group umbilical 2 (eight test blocks in the embodiment).

The two ends of the test block are in a cylinder shape from big to small which is matched with the large test block flange 1 and the small test block flange 3; and extends outwardly along the cylindrical test block.

The front surfaces of the large test block flange 1 and the small test block flange 3 are two cylinders respectively, and the cross sections of the large test block flange 1 and the small test block flange 3 are T-shaped.

The umbilicals 2 in a plurality of test blocks are symmetrically arranged around the test blocks in a welding mode or a bolt connection mode or are integrally formed around the test blocks; the test block single group umbilical member 2 is provided with: the plurality of columns are respectively an upper umbilical 4 and a left umbilical 5 which are arranged on one side of the test block cylinder wall 8, and a lower umbilical 6 and a right umbilical 7 which are oppositely arranged on the upper umbilical 4 and the left umbilical 5; wherein, the upper umbilical 4 and the lower umbilical 6 in one group are cylinders; a group of rings which are respectively sleeved outside the left position umbilicus 5 and the right position umbilicus 7.

The column extends outwards along the surface of the cylindrical test block, wherein the size of the test block single group umbilical 2 close to the large flange 1 side of the first casting shell core 16 is 15mm in diameter; the length is 30 mm; the size of the test block single group umbilicus 2 close to the test block small flange 3 side of the first casting non-shell core 15 is 15 mm; the length is 20 mm; the size of the test block single group umbilicus 2 close to the non-shell core 17 test block large flange 1 side of the second casting is 20 mm; the length is 30 mm; the size of the test block single group umbilicus close to the test block small flange 3 side of the second casting shell core 18 is 20 mm; the length is 20 mm.

As shown in fig. 3, when in use, the present invention is put into the first casting non-shell core mold core 10 and the first casting shell core mold core 11, and the second casting non-shell core mold core 12 and the second casting non-shell core mold core 13, which are oppositely disposed, and the above four are: the first casting non-shell core insert 10 and the first casting shell core insert 11, the second casting non-shell core insert 12 and the second casting non-shell core insert 13 which are oppositely arranged, and the casting mold shaping flow path device 14 are assembled on the template middle plate 9, so that the modeling template can be obtained.

After the molding is carried out by the template, four mold cavities can be obtained, and then the first casting non-shell core 15 and the second casting non-shell core 17 can be obtained by matching with a single inner core; combining the core and shell combination to provide a first casting shell core 16 and a second casting shell core 18; the four die cavities of the same die use inner cores with the same size, and the inner cores with two sizes in total have the diameter phi of 70.8mm corresponding to a test block with the wall thickness of 4.5 mm; the 6.0mm wall thickness test piece corresponds to a core diameter size phi 67.8mm, thereby obtaining wall thicknesses of the 4.5mm and 6.0mm test pieces.

The column body extends from the surface of the cylindrical test block to the outside, wherein the size of the test block single group umbilical close to the large flange side of the test block of the first casting shell core die core 11 is 15 mm; the length is 30 mm; the size of the test block single group umbilicus close to the small flange side of the test block of the first casting shell core die core 11 is 15 mm; the length is 20 mm; the size of the test block single group umbilicus close to the large flange side of the test block of the second casting shell core mold core 13 is 20 mm; the length is 30 mm; the size of the test block single group umbilicus close to the small flange side of the test block of the second casting shell core mold core 13 is 20 mm; the length is 20 mm.

As shown in fig. 4, the sizes of the small test block flange 3 and the large test block flange 1 of the first casting and the second casting are the same through the mold finishing device consisting of the available test block casting and the casting mold finishing flow path device after pouring.

In summary, after the various schemes are cross-matched, it can be known that: first casting no-shell core 15 and first

casting shell core

16 and 2 wall thicknesses, 2 navel sizes, 4 positions per navel, 2 flange sizes; the second casting is not a shell core 17 and a second casting shell core 18 and may have 2 wall thicknesses, 2 navel sizes, and 4 locations, 2 flange sizes for each navel.

The utility model discloses when experiment is tried, need the different heat-resisting cast iron material of pouring, to each kind of material foundry goods, need be to under its two kinds of wall thickness circumstances, test block small flange 3, test block large flange 1 and each group's navel of shell core and non-shell core scheme cut off, do inside shrinkage porosity inspection to record relevant data. And further compared with the result of casting simulation software, powerful experimental basis is provided for the adjustment parameters of the simulation software. Finally, the method is used for improving the product yield in production, improving the accuracy of casting simulation, and reducing the trial-manufacture times and period of new product development, thereby reducing the production cost of enterprises.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments still fall within the scope of the technical solution of the present invention.

Claims

1. A test block for a heat-resistant iron casting in a turbocharger is characterized in that: the method comprises the following steps: the test block is used for measuring shrinkage porosity of the umbilical and the flange in the turbocharger, and the test block large flange and the test block small flange are respectively sleeved at the two ends of the test block, wherein the test block is cylindrical, the two ends of the test block are respectively provided with through holes for inserting the test block large flange and the test block small flange, and a plurality of test blocks are arranged around the test block to form a single-group umbilical.

2. The test block of a heat-resistant iron casting for a turbocharger as claimed in claim 1, wherein: the two ends of the test block are in a cylinder shape from big to small which is matched with the big flange and the small flange of the test block; and extends outwardly along the cylindrical test block.

3. The test block of a heat-resistant iron casting for a turbocharger as claimed in claim 1, wherein: the front surfaces of the large test block flange and the small test block flange are two cylinders respectively, and the cross sections of the large test block flange and the small test block flange are T-shaped.

4. The test block of a heat-resistant iron casting for a turbocharger as claimed in claim 1, wherein: the plurality of test block single groups of umbilicals are symmetrically arranged around the test blocks or are integrally formed around the test blocks; the test block single group umbilical is provided with: the plurality of columns are respectively an upper umbilical and a left umbilical arranged on one side of the wall of the test block cylinder, and are oppositely arranged on a lower umbilical and a right umbilical which are opposite to the upper umbilical and the left umbilical; wherein, the upper umbilicus and the lower umbilicus in one group are cylinders; a group of rings which are respectively sleeved outside the left umbilical and the right umbilical.

5. The test block of heat-resistant iron casting in turbocharger as claimed in claim 4, wherein: the column extends outwards along the surface of the cylindrical test block.

6. The test block of a heat-resistant iron casting for turbochargers according to claim 1 or 4, characterized in that: the size of the test block single group of umbilicus is 15 mm; the length is 30 mm; the test block single group umbilicus is close to the large flange side of the test block of the first casting shell core.

7. The test block of a heat-resistant iron casting for turbochargers according to claim 1 or 4, characterized in that: the size of the test block single group of umbilicus is 15 mm; the length is 20 mm; the test block single group of umbilicals are close to the small flange side of the first casting non-shell core test block; the size of the test block single group of umbilicus is 20mm in diameter; the length is 30 mm; and is close to the large flange side of the second casting non-shell core test block.

8. The test block of a heat-resistant iron casting for turbochargers according to claim 1 or 4, characterized in that: the size of the test block single group of umbilicus is 20mm in diameter; the length is 20 mm; the test block single group of umbilicals is close to the small flange side of the test block of the shell core of the second casting.