CN103846395A

CN103846395A - Parting method for propeller or impeller casting mold

Info

Publication number: CN103846395A
Application number: CN201410079320.0A
Authority: CN
Inventors: 姚山; 赵枢明; 杨通
Original assignee: Dalian University of Technology
Current assignee: Dalian University of Technology
Priority date: 2014-03-05
Filing date: 2014-03-05
Publication date: 2014-06-11

Abstract

The invention relates to a propeller/impeller mold splitting method, which belongs to the field of casting technology. It is characterized in that the area between the adjacent blades 1# and 2# of the propeller/impeller is used as a single propeller parting block, and the block mold includes the pressure surface and suction surface of the adjacent blades, and also includes the adjacent blades between the hub surface and the outer ring of the casting mold; set matching positioning bosses and concave platforms at the corresponding positions of the casting mold; combine the block casting molds with the same number as the number of blades, and the adjacent positioning bosses and concave platforms are mutually Cooperate to form the overall mold of the part. The method can relatively simply complete the parting of the casting mold or casting core of the propeller or impeller with complex blades.

Description

The classifying method of a kind of screw or impeller casting mold

Technical field

The invention discloses a kind of screw or impeller casting mold classifying method, belong to casting technique field, be particularly useful for the screw of complicated shape, the casting somatotype of impeller.

Background technology

Screw and impeller be as typical 3 D complex curved surface part, its blade shape complexity, and blade shape construction when casting faces and is much difficult to the technical barrier that overcomes.

Traditional helical blade sheet moulding generally adopts the method for making full pattern wooden model or manual scraper plate fairing moulding; make respectively the casting mold of pressure face, suction surface for each blade; then mould assembly together; propeller hub face also needs to realize moulding by special frock simultaneously; such sculpting method technique is loaded down with trivial details, and precision is not high simultaneously.

Traditional impeller sculpt, simple shape is without the block mold that can directly turn over impeller processed by mould of the negative gradient of withdrawing pattern.But for most impellers, its blade shape complexity is spatial warping shape, turns over the conventional methods such as mould and be difficult to directly turn over block mold processed.

Summary of the invention

For the problem that overcomes that complicated operation, operation that the casting and molding technique of existing screw, impeller blade part exists are loaded down with trivial details, difficulty is large etc., the present invention proposes a kind of new casting mold classifying method, and the method can reduced proper motion technique, reduces the difficulty of moulding.

Technical scheme of the present invention:

The classifying method of a kind of screw or impeller casting mold, first the region between screw/impeller adjacent blades is as an independent piecemeal casting mold, pressure face and suction surface that this piecemeal casting mold comprises adjacent blades comprise propeller hub face and casting mold outer ring between adjacent blades simultaneously; Positioning boss and the concave station of cooperation are set at the correspondence position of casting mold; By the piecemeal casting mold combination identical with blade quantity, adjacent positioning boss and concave station cooperatively interact, the block mold of component part.

For screw, region between adjacent blade is as an independent piecemeal casting mold, the pressure face that this piecemeal casting mold comprises 1# blade and the suction surface of 2# blade, the die joint of casting mold is selected the upwards somatotype of guide margin with 1#, 2# blade, with the downward somatotype of lagging edge of 1#, 2# blade, comprise propeller hub face and casting mold outer ring between 1#, 2# blade simultaneously; On 1# blade-side guide margin top, positioning concave stations is set, 2# blade-side guide margin top same position arranges positioning boss, and 1# blade lagging edge bottom arranges lower positioning boss, and 2# blade-side lagging edge bottom same position arranges lower positioning concave stations; By the piecemeal casting mold combination identical with blade quantity, adjacent upper positioning concave stations coordinates upper positioning boss, and lower positioning concave stations coordinates lower positioning boss, the block mold of composition target screw.

For the somatotype of unshrouded impeller, the pressure face of the suction surface that somatotype piece comprises 1# blade and 2# blade, the die joint of casting mold is selected the outside somatotype in outer with adjacent two blades, comprises wheel hub surface and casting mold outer ring between two blades simultaneously; On 1# blade-side top, positioning boss is set, 2# blade-side top same position arranges positioning concave stations; 1# blade bottom arranges lower positioning concave stations, and 2# blade-side bottom same position arranges lower positioning boss.

For the somatotype of double shrouded wheel, the suction surface of the pressure face that somatotype piece comprises 1# blade and 2# blade, and wheel hub surface and integral shroud face between 1#, 2# blade, comprise casting core outer ring and casting in-core circle simultaneously, outer ring die joint is the plane through impeller middle spindle line and blade outer, inner ring die joint for from blade along starting through impeller middle spindle line.

The invention has the beneficial effects as follows, the casting mold quantity of screw reduces half, and every block casting type has all comprised profile, the propeller hub of adjacent blades, is applicable to the large screws of traditional design difficulty such as blade quantity is many, root of blade is overlapping, large skew back blade.

Brief description of the drawings

Fig. 1 is screw top view of the present invention.

Fig. 2 is the oblique view of screw.

Fig. 3 is the axis side view such as grade of the piecemeal casting mold of screw.

Fig. 4 is 20 ° of upward views of the piecemeal casting mold of screw.

Fig. 5 A is the assembling view of screw piecemeal casting mold.

Fig. 5 B is the assembling top view of screw piecemeal casting mold.

Fig. 6 is the oblique view of unshrouded impeller.

Fig. 7 is 20 ° of top views of the casting mold somatotype piece of unshrouded impeller.

Fig. 8 is the axis side view such as grade of the casting mold somatotype piece of unshrouded impeller.

Fig. 9 is the somatotype piece assembly drawing of unshrouded impeller.

Figure 10 is the casting mold overall package figure of double shrouded wheel in specific embodiment 2.

Figure 11 is the partial sectional view of double shrouded wheel.

Figure 12 is the axis side view such as grade of the casting core piecemeal of double shrouded wheel.

Figure 13 is 30 ° of upward views of the casting core piecemeal of double shrouded wheel.

Figure 14 is the casting core assembly drawing of double shrouded wheel.

In figure: 1 pressure face; 2 suction surfaces; 3 guide margins; 4 lagging edges; Positioning boss on 5; Positioning concave stations on 6; 7 times positioning boss; 8 times positioning concave stations; 9 propeller hub faces; 10 casting mold outer rings; 11 pressure faces; 12 suction surfaces; 13 wheel hub surfaces; 14 casting mold outer rings; 15 die joints; Positioning boss on 16; Positioning concave stations on 17; 18 times positioning boss; 19 times positioning concave stations; 20 unshrouded impeller somatotype pieces; 21 pressure faces; 22 suction surfaces; 23 wheel hub surfaces; 24 integral shroud faces; 25 casting core outer rings; 26 casting in-core circles; 27 outer ring die joints; 28 inner ring die joints; 29 double shrouded wheel somatotype pieces.

Detailed description of the invention

The present invention is not only applicable to the casting mold somatotype of screw or impeller, below narrates the present invention and be applicable to the embodiment of screw and impeller.

Embodiment 1

Seven vane propeller casting mold somatotypes

As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5 A and Fig. 5 B, seven vane propeller casting mold classifying methods are following step:

(1) region between screw is adjacent blade 1# and 2# is as an independent screw somatotype piece, the pressure face 1 that this piecemeal casting mold comprises 1# blade and the suction surface 2 of 2# blade, the die joint of casting mold is selected the upwards somatotype of guide margin 3 with 1#, 2# blade, with the downward somatotype of lagging edge 4 of 1#, 2# blade, comprise propeller hub face 9 and casting mold outer ring 10 between 1#, 2# blade simultaneously

(2) on 1# blade-side guide margin 3 tops, positioning concave stations 6 is set, 2# blade-side guide margin 3 top same positions arrange

positioning boss

5, and 1# blade lagging edge 4 bottoms arrange

lower positioning boss

7, and 2# blade-side lagging edge 4 bottom same positions arrange lower positioning concave stations 8.

(3) by seven screw somatotype piece combinations that shape is identical, adjacent die joint is bonded to each other, and adjacent upper positioning boss 5 coordinates upper positioning concave stations 6, and lower positioning boss 7 coordinates lower positioning concave stations 8, the block mold of composition seven vane propellers.

Embodiment 2

Seven leaf unshrouded impeller casting mold somatotypes

Seven leaf unshrouded impeller casting mold classifying methods as shown in Fig. 6-Fig. 9, is characterized in that following step:

(1) region between impeller is adjacent blade 1# and 2# is as an independent unshrouded impeller somatotype piece 20, the suction surface 12 that this unshrouded impeller somatotype piece 20 comprises 1# blade and the pressure face 11 of 2# blade, the die joint 15 of casting mold is selected the outside somatotype in outer with 1#, 2# blade, comprises wheel hub surface 13 and casting mold outer ring 14 between 1#, 2# blade simultaneously.

(2) on 1# blade-side top, positioning boss 16 is set, 2# blade-side top same position arranges positioning concave stations 17; 1# blade bottom arranges lower positioning

concave stations

19, and 2# blade-side bottom same position arranges lower positioning boss 18.

(3) seven identical unshrouded impeller somatotype pieces 20 of shape are combined, adjacent die joint 15 is bonded to each other, and adjacent upper positioning boss 16 coordinates upper positioning concave stations 17, and lower positioning boss 18 coordinates lower positioning concave stations 19, the block mold of composition seven leaf unshrouded impellers.

Embodiment 3

Six leaf double shrouded wheel casting core somatotypes

Six leaf double shrouded wheel casting core classifying methods as shown in Figure 10-Figure 14, is characterized in that following step:

(1) region between impeller is adjacent blade 1# and 2# is as an independent double shrouded wheel casting core somatotype piece 29, the pressure face 21 that this double shrouded wheel somatotype piece 29 comprises 1# blade and the suction surface 22 of 2# blade, and wheel hub surface 23 and integral shroud face 24 between 1#, 2# blade, comprise casting core outer ring 25 and casting in-core circle 26 simultaneously, outer ring die joint 27 is the plane through impeller middle spindle line and blade outer, inner ring die joint for from blade along starting through impeller middle spindle line.

(2) six identical double shrouded wheel somatotype pieces 29 of shape are combined, adjacent outer ring die joint 27, inner ring die joint 28 are bonded to each other respectively, the entirety casting core of composition six leaf double shrouded wheels.

Claims

1. a method for parting of propeller or impeller mold, is characterized in that, comprises steps as follows:

(1) The area between the adjacent blades 1# and 2# of the propeller/impeller is used as a separate propeller parting block. between the hub face and cast outer ring;

(2) Set matching positioning bosses and recesses at the corresponding positions of the mold;

(3) Combine block molds with the same number of blades, and the adjacent positioning bosses and concave tables cooperate with each other to form the overall mold of the part.

2. parting method according to claim 1, it is characterized in that: for the parting of propeller, block mold comprises the pressure surface (1) of 1# blade and the suction surface (2) of 2# blade, and mold The parting surface of 1# and 2# blades is divided upward by the leading edge (3) of the blades, and the follower edge (4) of 1# and 2# blades is used to divide downwards, including the gap between 1# and 2# blades. The propeller hub surface (9) and cast outer ring (10); set the upper positioning concave platform (6) on the upper part of the 1# blade side guide edge (3), and set the upper positioning concave platform (6) on the upper part of the 2# blade side guide edge (3) Locating boss (5), 1# blade side with side (4) bottom is provided with lower positioning boss (7), 2# blade side with side with side (4) bottom same position is provided with lower positioning concave platform (8).

3. The typing method according to claim 1, characterized in that: for the splitting of the open impeller, the splitting block (20) of the open impeller includes the suction surface (12) of the 1# blade and the pressure of the 2# blade Surface (11), the parting surface (15) of the casting mold chooses the outer edges of the 1# and 2# blades to form outwards, and includes the hub surface (13) between the 1# and 2# blades and the outer surface of the mold. ring (14); set the upper positioning boss (16) on the upper part of the 1# blade side, set the upper positioning concave platform (17) at the same position on the upper part of the 2# blade side; set the lower positioning concave platform (19) on the lower part of the 1# blade, 2 #Set the lower positioning boss (18) at the same position on the lower part of the blade side.

4. The parting method according to claim 1, characterized in that: for the parting of the closed impeller, the parting block (29) of the closed impeller includes the pressure surface (21) of the 1# blade and the suction force of the 2# blade surface (22), and the hub surface (23) and blade crown surface (24) between the 1# and 2# blades, including the outer ring of the casting core (25) and the inner ring of the casting core (26), the outer ring type The surface (27) is a plane passing through the central axis of the impeller and the outer edge of the blade, and the parting surface of the inner ring passes through the central axis of the impeller from the inner edge of the blade.