阅读说明：本技术 一种无焊接轴流风机的高压铸造工艺 (High-pressure casting process of weldless axial flow fan ) 是由 胡伟锋 竹渝晓 卢青青 陈一伟 石红 于 2019-12-18 设计创作，主要内容包括：本发明公开了一种无焊接轴流风机的高压铸造工艺,具体为叶轮的高压铸造工艺,包括：a、铸型设计与制造：根据叶轮形状设计处铸型形状,完成锥形的制造；b、铸型安装与测试：将铸型装入到铸造机内,对铸型的性能指标做测试；c、铸型预处理：对铸型做预加热处理后,在铸型内壁上喷涂涂料；d、合型与浇铸：铸型上下模相合并后,将熔融状态的金属注入到铸型内；e、压射与冷却：对注射的压力做合理控制,使金属填充整个铸型,随后对铸型做冷却处理,使铸件快速成型；f、开模取件：铸型成型完成后,上下模开启,直接将成型后的铸件取出；g、质量检验：对取得的铸件做指标检测及表面处理,筛选符合要求的铸件,获得成品。(The invention discloses a high-pressure casting process of a weldless axial flow fan, in particular to a high-pressure casting process of an impeller, which comprises the following steps: a. designing and manufacturing a casting mold: finishing the manufacturing of a cone according to the shape of a casting mold at the shape design position of the impeller; b. and (3) mounting and testing a casting mold: filling the casting mould into a casting machine, and testing the performance index of the casting mould; c. pretreatment of a casting mold: after preheating the casting mould, spraying paint on the inner wall of the casting mould; d. and (3) mould assembling and casting: after combining the upper mold and the lower mold of the casting mold, injecting molten metal into the casting mold; e. injecting and cooling: reasonably controlling the injection pressure to enable the metal to fill the whole casting mold, and then cooling the casting mold to enable the casting to be rapidly molded; f. opening the mold and taking out the parts: after the casting mold is formed, opening the upper mold and the lower mold, and directly taking out the formed casting; g. quality inspection: and (4) performing index detection and surface treatment on the obtained casting, and screening the casting meeting the requirements to obtain a finished product.)

1. A high-pressure casting process of a weldless axial flow fan is characterized in that: in particular to a high-pressure casting process of an impeller, which comprises the following steps:

a. designing and manufacturing a casting mold: finishing the manufacturing of a cone according to the shape of a casting mold at the shape design position of the impeller;

b. and (3) mounting and testing a casting mold: filling the casting mould into a casting machine, and testing the performance index of the casting mould;

c. pretreatment of a casting mold: after preheating the casting mould, spraying paint on the inner wall of the casting mould;

d. and (3) mould assembling and casting: after combining the upper mold and the lower mold of the casting mold, injecting molten metal into the casting mold;

e. injecting and cooling: reasonably controlling the injection pressure to enable the metal to fill the whole casting mold, and then cooling the casting mold to enable the casting to be rapidly molded;

f. opening the mold and taking out the parts: after the casting mold is formed, opening the upper mold and the lower mold, and directly taking out the formed casting;

g. quality inspection: performing index detection and surface treatment on the obtained casting, and screening the casting meeting the requirements to obtain a finished product;

the casting machine in the step b comprises a base (1) and a mounting plate (31) arranged on the base (1), the bottom of the mounting plate (31) is rotatably connected with a first connecting plate (32), a first driving motor for driving the first connecting plate (32) to rotate is arranged on the mounting plate (31), and a hydraulic cylinder (3) is further arranged on the mounting plate (31); a first groove is formed in the base (1), a fixing assembly is arranged in the first groove, and a heating plate (11) is arranged at the bottom of the first groove; a first connecting block (2) is arranged on the side wall of the base (1), a supporting block is arranged at the bottom of the first connecting block (2), a first liquid storage cavity is arranged on the first connecting block (2), a first movable groove is arranged at the top of the first liquid storage cavity, a movable block (21) is arranged in the first movable groove, a first connecting rod (22) is arranged on the movable block (21), a second connecting plate (23) is arranged at the top of the first connecting rod (22), a first transfusion cavity is arranged on the second connecting plate (23), a second transfusion cavity communicated with the first transfusion cavity is arranged on the first connecting rod (22), an infusion tube (213) communicated with the second infusion cavity is arranged on the movable block (21), a first liquid spraying port and a second liquid spraying port are formed in the second connecting plate (23), and a coating recovery assembly is further arranged on the second connecting plate (23); when the impeller is cast, the upper die is arranged on the first connecting plate (32), the lower die is arranged in the first groove, the lower die is preheated by the heating plate (11), so that the lower die has a certain temperature, and when the upper die descends to contact with the lower die, the heat on the lower die is transferred to the upper die, so that the preheating of the whole casting mold is completed; after the upper die and the lower die are preheated, the upper die and the lower die are in a separated state, the movable block (21) moves along the first movable groove, the movable block (21) is made to move to one end of the first movable groove, the second connecting plate (23) moves to a position between the upper die and the lower die, the liquid conveying pipe (213) inputs coating in the first liquid storage cavity into the first liquid conveying cavity, the coating in the first liquid conveying cavity is sprayed out from the first liquid spraying port and the second liquid spraying port, the coating is respectively sprayed on the upper die and the lower die, the coating operation of the upper die and the lower die is finished, redundant coating on the upper die and the lower die is collected again through the coating recovery assembly, the movable block (21) moves to the other end of the first movable groove, the second connecting plate (23) is moved out from the position between the upper die and.

2. The high-pressure casting process of the weldless axial flow fan according to claim 1, wherein: the pressure of the high-pressure casting is 15-100 MPa.

3. The high-pressure casting process of the weldless axial flow fan according to claim 1, wherein: the molten metal fills the die cavity at a high speed of 10-50 m/s.

4. The high-pressure casting process of the weldless axial flow fan according to claim 1, wherein: the filling time of the molten metal is 0.01-0.2 s.

5. The high-pressure casting process of the weldless axial flow fan according to claim 1, wherein: a backflow port is formed in the second connecting plate (23), the coating recovery assembly comprises a first material receiving plate (24) arranged on the second connecting plate (23), an absorption pad (232) arranged at the bottom of the first material receiving plate (24), a pressing plate (25) matched with the absorption pad (232) and a second material receiving plate (251) arranged at the bottom of the pressing plate (25), the first material receiving plate (24) is arranged on one side of the backflow port, the second material receiving plate (251) is arranged on one side of the second liquid spraying port, and inclined planes are formed at the bottoms of the first material receiving plate (24) and the second material receiving plate (251); a plurality of first through holes are formed in the pressing plate (25), and a second driving motor (27) for driving the pressing plate (25) to rotate and a first air cylinder (261) for driving the pressing plate (25) to move up and down are arranged on the movable block (21); after the casting mold is preheated, the movable block (21) moves to one end of the first movable groove, the coating enters a first liquid conveying cavity from a liquid conveying pipe (213), the coating is sprayed out from a first liquid spraying port and a second liquid spraying port, the coating sprayed out from the first liquid spraying port is directly sprayed on an upper die, redundant coating on the upper die flows under the gravity, the redundant coating falls on the first material receiving plate (24), the coating flows into a return port along the bottom surface of the first material receiving plate (24), and the coating enters the first liquid conveying cavity again; the coating sprayed from the second liquid spraying port is sprayed on the lower die, after the lower die is sprayed, the second driving motor (27) drives the pressing plate (25) to rotate, the absorption pad (232) is expanded to be contacted with the lower die after losing the extrusion, the redundant coating on the lower die is absorbed, and when the movable block (21) moves back, after the first air cylinder (261) drives the pressing plate (25) to move downwards, the second driving motor (27) drives the pressing plate to rotate to the lower side of the absorption pad (232), the first air cylinder (261) pushes the pressing plate (25) to move upwards, the pressing plate (25) is enabled to extrude the absorption pad (232), the coating in the absorption pad (232) is extruded and then falls down through the first through hole, the coating on the absorption pad (232) falls onto the second material receiving plate (251), the coating on the second material receiving plate (251) flows into the second liquid spraying hole along the inclined surface, the coating flows into the first liquid conveying cavity again, and the recovery processing of the coating is completed.

6. The high-pressure casting process of the weldless axial flow fan according to claim 1, wherein: the inner wall of the first groove is provided with a second movable groove, the top of the second movable groove is provided with a third movable groove, the fixing component comprises a rotary roller (14) rotatably arranged in the second movable groove, a fixed block arranged on the rotary roller (14), a transmission plate (12) arranged on one side of the rotary roller (14) and a third connecting plate arranged on the top of the transmission plate (12), the third connecting plate is arranged in the third movable groove in a penetrating manner, the third connecting plate is provided with a fourth movable groove, the third connecting plate is provided with a fourth connecting plate (121), the bottom of the fourth connecting plate (121) is provided with a first connecting block matched with the fourth movable groove, the base (1) is provided with a second groove matched with the fourth connecting plate (121), the second groove is internally provided with a plurality of limiting rods (13), the bottom of the fourth connecting plate (121) is provided with limiting grooves matched with the limiting rods (13), a push block (122) is arranged on the fourth connecting plate (121); after the lower die is arranged in the first groove, the fourth connecting plate (121) is pulled upwards, the first connecting block moves towards the top of the fourth movable groove, the limiting rod (13) is separated from the limiting groove, the fourth connecting plate (121) is rotated, the fourth connecting plate (121) drives the transmission plate (12) to rotate, the transmission plate (12) drives the rotating roller (14) to rotate, the fixing block is rotated to be in contact with the side wall of the lower die, the fixing block abuts against the side wall of the lower die, and the lower die is fixed in the first groove; and pushing the fourth connecting plate (121) downwards, pressing the fourth connecting plate (121) into the second groove, inserting the limiting rod (13) into the limiting groove, fixing the fourth connecting plate (121), and completing the installation of the lower die.

Technical Field

The invention belongs to the technical field of fan processing, and particularly relates to a high-pressure casting process of a weldless axial flow fan.

Background

At present, the common design in the fan industry adopts a welding method to assemble all parts of the fan. The method is carried out manually, the labor intensity is high, welding defects are easy to generate on welding points, and the manufacturing and the installation are very complicated.

In addition, the impeller of the axial flow fan of the industrial and civil buildings on the market at present is generally made of a low-pressure cast impeller or a steel welded impeller. The low-pressure cast impeller is heavy and lacks market competitiveness; the steel welded impeller is easy to deviate from the technical requirements, and the efficiency of performance parameters is low.

When the impeller is manufactured by adopting a casting mode, the surface of a casting mold needs to be coated with paint, the phenomenon that a casting is adhered to the surface of the casting mold after being formed is avoided, so that the casting mold can be quickly separated from a mold, the paint needs to be mixed together with various raw materials, the casting mold is generally and directly installed on the casting machine, the coating is very inconvenient to carry out, the manual coating mode is generally adopted, the manual coating has great potential safety hazard, and one-time casting needs to be carried out, so that the working strength is great.

Disclosure of Invention

The invention provides a high-pressure casting process of a weldless axial flow fan, aiming at overcoming the defects of the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme: a high-pressure casting process of a weldless axial flow fan, in particular to a high-pressure casting process of an impeller, comprises the following steps:

a. designing and manufacturing a casting mold: finishing the manufacturing of a cone according to the shape of a casting mold at the shape design position of the impeller;

b. and (3) mounting and testing a casting mold: filling the casting mould into a casting machine, and testing the performance index of the casting mould;

c. pretreatment of a casting mold: after preheating the casting mould, spraying paint on the inner wall of the casting mould;

d. and (3) mould assembling and casting: after combining the upper mold and the lower mold of the casting mold, injecting molten metal into the casting mold;

e. injecting and cooling: reasonably controlling the injection pressure to enable the metal to fill the whole casting mold, and then cooling the casting mold to enable the casting to be rapidly molded;

f. opening the mold and taking out the parts: after the casting mold is formed, opening the upper mold and the lower mold, and directly taking out the formed casting;

g. quality inspection: performing index detection and surface treatment on the obtained casting, and screening the casting meeting the requirements to obtain a finished product;

the casting machine in the step b comprises a base and a mounting plate arranged on the base, wherein the bottom of the mounting plate is rotatably connected with a first connecting plate, a first driving motor for driving the first connecting plate to rotate is arranged on the mounting plate, and a hydraulic cylinder is also arranged on the mounting plate; a first groove is formed in the base, a fixing assembly is arranged in the first groove, and a heating plate is arranged at the bottom of the first groove; a first connecting block is arranged on the side wall, a supporting block is arranged at the bottom of the first connecting block, a first liquid storage cavity is arranged on the first connecting block, a first movable groove is arranged at the top of the first liquid storage cavity, a movable block is arranged in the first movable groove, a first connecting rod is arranged on the movable block, a second connecting plate is arranged at the top of the first connecting rod, a first transfusion cavity is arranged on the second connecting plate, a second transfusion cavity communicated with the first transfusion cavity is arranged on the first connecting rod, a transfusion tube communicated with the second transfusion cavity is arranged on the movable block, a first liquid spraying port and a second liquid spraying port are arranged on the second connecting plate, and a coating recovery assembly is further arranged on the second connecting plate; when the impeller is cast, the upper die is arranged on the first connecting plate, the lower die is arranged in the first groove, the heating plate performs preheating treatment on the lower die, so that the lower die has certain stability, and when the upper die descends to contact with the lower die, the heat on the lower die is transferred to the upper die to complete the preheating treatment of the whole casting mold; after the upper die and the lower die are preheated, the upper die and the lower die are in a separation state, the movable block moves along the first movable groove, the movable block is moved to one end of the first movable groove, the second connecting plate moves between the upper die and the lower die, the liquid conveying pipe inputs coating in the first liquid storage cavity into the first liquid conveying cavity, the coating in the first liquid conveying cavity is sprayed out from the first liquid spraying opening and the second liquid spraying opening, the coating is respectively sprayed on the upper die and the lower die, the coating operation of the upper die and the lower die is finished, the redundant coating on the upper die and the lower die is collected again through the coating recovery assembly, the movable block moves towards the other end of the first movable groove, the second connecting plate is moved out from the upper die and the lower die, and the upper.

After the casting mold is loaded into a casting machine, preheating treatment is carried out on the casting mold under the action of a heating disc, and then coating is coated on the surface of the casting mold through a movable block, so that the two steps are connected together continuously, the pretreatment operation of the casting mold can be automatically completed without manual participation, the processing efficiency of an impeller is improved, and the impeller casting is automatically carried out; the movable block moves between the upper die and the lower die as required by moving the movable block in the first movable groove, so that the coating is sprayed on the surfaces of the upper die and the lower die, the normal movement of the upper die is not influenced while the operation of the coating is automatically carried out, the automation degree of impeller casting is improved, and the potential safety hazard in the impeller casting process is reduced; under the action of the first driving motor, the upper die is rotated during paint spraying, so that the paint is more uniformly coated on the upper die, the bottom surface of the whole upper die can be covered with the paint, and the paint coating effect of the upper die is improved; under the setting of the coating recovery assembly, redundant coating is conveniently recovered, the waste of the coating is reduced, meanwhile, the influence of the excessive coating coated on a casting mould on the casting is prevented, the casting quality is improved, and the casting process is normally carried out; through the arrangement of the first liquid spraying port and the second liquid spraying port, the upper die and the lower die correspond to one liquid spraying port respectively, so that the coating can be accurately sprayed on the upper die and the lower die, and the coating coverage uniformity is further improved.

The pressure of the high-pressure casting is 15-100 MPa.

The molten metal fills the die cavity at a high speed of 10-50 m/s.

The filling time of the molten metal is 0.01-0.2 s.

A backflow port is formed in the second connecting plate, the coating recovery assembly comprises a first material receiving plate arranged on the second connecting plate, an absorption pad arranged at the bottom of the first material receiving plate, a pressing plate matched with the absorption pad and a second material receiving plate arranged at the bottom of the pressing plate, the first material receiving plate is arranged on one side of the backflow port, the second material receiving plate is arranged on one side of the second liquid spraying port, and inclined planes are formed at the bottoms of the first material receiving plate and the second material receiving plate; the pressing plate is provided with a plurality of first through holes, and the movable block is provided with a second driving motor for driving the pressing plate to rotate and a first air cylinder for driving the pressing plate to move up and down; after the casting mold is preheated, the movable block moves to one end of the first movable groove, the coating enters the first infusion cavity from the infusion tube, the coating is sprayed out from the first liquid spraying port and the second liquid spraying port, the coating sprayed out from the first liquid spraying port is directly sprayed on the upper die, redundant coating on the upper die flows under the gravity, the redundant coating falls on the first material receiving plate, the coating flows into the return port along the bottom surface of the first material receiving plate, and the coating enters the first infusion cavity again; the coating sprayed from the second liquid spraying port is sprayed on the lower die, after the spraying of the lower die is finished, the second driving motor drives the pressing plate to rotate, the absorption pad is expanded to be in contact with the lower die after the extrusion is lost, the redundant coating on the lower die is absorbed, when the movable block moves back, the first air cylinder drives the pressing plate to move downwards, then the second driving motor drives the pressing plate to rotate to the position below the absorption pad, the first air cylinder drives the pressing plate to move upwards, so that the pressing plate extrudes the absorption pad, the coating in the absorption pad falls down through the first through hole after being extruded, so that the coating on the absorption pad falls onto the second material receiving plate, the coating on the second material receiving plate flows into the second liquid spraying port along the inclined surface, so that the coating flows into the first liquid conveying cavity again, and the recovery treatment of the coating is finished; the first material receiving plate and the second material receiving plate are used for respectively recycling the coatings on the upper die and the lower die, so that redundant coatings on the upper die are prevented from dropping on the lower die, the coatings on the upper die and the lower die cannot be influenced mutually, and the coating effect on the upper die and the lower die is improved; under the arrangement of the inclined plane, the coating dropped on the material receiving plate can automatically flow along the bottom surface of the material receiving plate, so that the coating on the material receiving plate is guided into the first material conveying cavity, and the coating is guided into the first material conveying cavity again to finish the recovery treatment of the coating; under the action of the pressing plate, the state of the absorption pad is controlled, so that the coating is prevented from being blocked by the absorption pad when being sprayed out of the second liquid spraying port, and the coating is normally sprayed on the lower die; through the rotation of clamp plate, avoid clamp plate and lower mould to produce the collision, make the inflation that the absorption was filled up nature contact with the lower mould, so that do the absorption to coating under the absorption pad effect, absorb unnecessary coating on the lower mould, under first cylinder and second driving motor's the mutually supporting, make the clamp plate can directly up move from the absorption pad below, produce the squeezing action to the absorption pad, effectually extrude the coating in the absorption pad, make the absorption pad be in second hydrojet mouth top, avoid the absorption pad to cause the influence to the hydrojet of second hydrojet mouth.

A second movable groove is arranged on the inner wall of the first groove, a third movable groove is arranged on the top of the second movable groove, the fixed component comprises a rotating roller which is rotatably arranged in the second movable groove, a fixed block which is arranged on the rotating roller, a transmission plate which is arranged on one side of the rotating roller and a third connecting plate which is arranged on the top of the transmission plate, the third connecting plate is arranged in the third movable groove in a penetrating way, a fourth movable groove is arranged on the third connecting plate, a fourth connecting plate is arranged on the third connecting plate, a first connecting block matched with the fourth movable groove is arranged at the bottom of the fourth connecting plate, a second groove matched with the fourth connecting plate is arranged on the base, a plurality of limiting rods are arranged in the second groove, a limiting groove matched with the limiting rod is formed in the bottom of the fourth connecting plate, and a pushing block is arranged on the fourth connecting plate; after the lower die is arranged in the first groove, the fourth connecting plate is pulled upwards, the first connecting block moves towards the top of the fourth movable groove, the limiting rod is separated from the limiting groove, the fourth connecting plate is rotated, the fourth connecting plate drives the transmission plate to rotate, the transmission plate drives the rotary roller to rotate, the fixing block is rotated to be in contact with the side wall of the lower die, the fixing block abuts against the side wall of the lower die, and the lower die is fixed in the first groove; pushing the fourth connecting plate downwards, pressing the fourth connecting plate into the second groove, inserting the limiting rod into the limiting groove, and fixing the fourth connecting plate to complete the installation of the lower die; the action of fixing the lower die is converted into rotary motion by rotating the fourth connecting plate, so that the fixing operation of the lower die is more labor-saving, the lower die is conveniently and quickly fixed in the first groove, and the matching effect of the lower die and the upper die is ensured; under the mutual matching of the limiting rod and the limiting groove, the fourth connecting plate is prevented from moving when the lower die is used, the fixing effect of the fixing block on the lower die is ensured, the fixing block is abutted against the side wall of the lower die, and the fixing effect on the lower die is further improved; under the mutually supporting of first connecting block and fourth movable groove, make the fourth connecting plate can be relative the third connecting plate and do the up-and-down motion to do control to the fourth connecting plate, make the fourth connecting plate rotate as required, reduce the control degree of difficulty to the fixed block.

The invention has the following advantages: after the casting mold is loaded into a casting machine, preheating treatment is carried out on the casting mold under the action of a heating disc, and then coating is coated on the surface of the casting mold through a movable block, so that the two steps are connected together continuously, the pretreatment operation of the casting mold can be automatically completed without manual participation, the processing efficiency of an impeller is improved, and the impeller casting is automatically carried out; through the removal of movable block in first activity inslot, make the movable block remove between the upper and lower mould as required to at upper and lower mould surface coating, do not influence the normal removal of last mould when making the operation of coating go on automatically, promote impeller casting degree of automation, reduce the potential safety hazard in the impeller casting process.

Drawings

FIG. 1 is a schematic view of the structure of a casting machine in example 1 of the present invention.

FIG. 2 is a front view of the casting machine in example 1 of the present invention.

Fig. 3 is a sectional view taken at a-a in fig. 2.

Fig. 4 is an enlarged view of a portion a in fig. 3.

Fig. 5 is an enlarged view of fig. 3 at B.

Fig. 6 is an enlarged view of fig. 3 at C.

Fig. 7 is an enlarged view of fig. 3 at D.

Fig. 8 is an enlarged view of fig. 3 at E.

Fig. 9 is a sectional view taken at B-B in fig. 2.

Fig. 10 is an enlarged view of fig. 9 at F.

Fig. 11 is an enlarged view at G in fig. 10.

Fig. 12 is a sectional view taken at C-C in fig. 2.

Fig. 13 is an enlarged view of fig. 12 at H.

Fig. 14 is an enlarged view at I in fig. 12.

Detailed Description