CN112808938A - Manufacturing method of aluminum lower exhaust pipe of double-cylinder pendulum type oilless air compressor - Google Patents

Abstract

The invention discloses a method for manufacturing an aluminum lower exhaust pipe of a double-cylinder pendulum oil-free air compressor, which comprises the following manufacturing steps: s1, high-temperature melting, exhausting and removing impurities: placing the alloy aluminum ingot in a high-temperature smelting furnace to be smelted into high-temperature aluminum liquid, fully stirring the aluminum liquid after the aluminum liquid is completely smelted to remove air in the aluminum liquid, removing impurities on the surface of the aluminum liquid, keeping the temperature of the smelting furnace, and keeping the aluminum liquid for later use; s2, fixing the mold; s3, brushing a release agent; s4, forming a sand core for later use; s5, opening the metal mold, placing the movable block at the bending position at the mold positioning position, and then placing the manufactured sand core in the mold; s6, closing the die and pouring aluminum liquid; s7, opening the mould and taking out: opening the mould to take out the formed product, taking down the movable block at the bent part of the product and shattering the sand core in the inner cavity of the product to take out the sand core; and S8, deburring to obtain the finished product. The integrally formed manufacturing method replaces the original multi-part assembly technology, reduces the cost, reduces the installation difficulty and is convenient for continuous production.

Description

Manufacturing method of aluminum lower exhaust pipe of double-cylinder pendulum type oilless air compressor

Technical Field

The invention relates to the technical field of air compressor exhaust pipes, in particular to a manufacturing method of an aluminum lower exhaust pipe of a double-cylinder pendulum type oilless air compressor.

Background

An air compressor is a device for compressing gas. The air compressor is constructed similarly to a water pump. Most air compressors are reciprocating piston type, rotating vane or rotating screw. Centrifugal compressors are very large applications. The exhaust pipe of the air compressor generally comprises a main pipe, a branch pipe extends from the main pipe, the branch pipe is butted and fixed with other equipment or pipelines, and a flange plate is required to be arranged at an opening position for connection.

The exhaust port of the exhaust pipe of the existing double-cylinder pendulum oil-free air compressor is positioned in the middle of the upper part of the air compressor, and the exhaust port needs to be subjected to multi-channel 90-degree corner transition when being connected with a conveying pipeline, so that the defects of high material cost, high installation difficulty and high multi-channel joint sealing requirement of pipeline connection exist.

Therefore, a manufacturing method of an aluminum lower exhaust pipe of the double-cylinder pendulum type oilless air compressor is provided.

Disclosure of Invention

The invention provides a method for manufacturing an aluminum lower exhaust pipe of a double-cylinder pendulum type oilless air compressor, aiming at the defects in the background technology.

The invention adopts the following technical scheme to solve the phenomenon, and the manufacturing method of the aluminum lower exhaust pipe of the double-cylinder pendulum oil-free air compressor comprises the following manufacturing steps: s1, high-temperature melting, exhausting and removing impurities: placing the alloy aluminum ingot in a high-temperature smelting furnace to be smelted into high-temperature aluminum liquid, fully stirring the aluminum liquid after the aluminum liquid is completely smelted to remove air in the aluminum liquid, removing impurities on the surface of the aluminum liquid, keeping the temperature of the smelting furnace, and keeping the aluminum liquid for later use; s2, fixing the mold: placing the metal mold on casting equipment, fixing firmly, checking the running state of the metal mold, and arranging an exhaust hole and a casting head on the metal mold; s3, brushing a release agent: coating a mold release agent on a sand core mold responsible for the inner wall shape and core molding of a product, and placing the mold release agent on a sand core machine; s4, forming a sand core: placing the precoated sand with the granularity of 100-plus-200 meshes into a sand core mold, and compacting the precoated sand through vibration of a sand core machine to form a sand core for later use; s5, placing a movable block: opening a metal mold, placing the movable block at the bending position at the mold positioning position, and then placing the manufactured sand core in the mold; s6, die assembly and aluminum liquid pouring: closing the die, and pouring the aluminum liquid into the die cavity through a casting head to form a product; s7, opening the mould and taking out: opening the mould to take out the formed product, taking down the movable block at the bent part of the product and shattering the sand core in the inner cavity of the product to take out the sand core; s8, deburring to obtain a finished product: and removing redundant pouring channels and burrs on the product, and performing subsequent processing procedures to obtain a finished product.

As a further preferable mode of the invention, the upper and lower templates of the metal mould are 7-shaped, the middle bending part is in a movable block form, the upper template is provided with an exhaust groove and a pouring gate, the upper part of the mould is provided with a casting head, and the upper and lower templates are combined to form a closed inner cavity.

As a further preferred mode of the invention, the whole sand core is formed by combining a plurality of small sand cores into a set of complete sand core, the sand core is manufactured in advance by adopting a sand core machine matched with a plurality of sets of sand core molds, and the sand core molds are made of carbon steel and are provided with ejection mechanisms.

In a further preferred embodiment of the present invention, the molded product includes a main pipe, a main pipe exhaust flange, a branch pipe, and a branch pipe intake flange which are integrally molded.

The manufacturing method of the aluminum lower exhaust pipe of the double-cylinder pendulum oil-free air compressor replaces the original multi-part assembly technology, overcomes the defect that the pipeline can be connected on the conveying pipeline only by carrying out 90-degree elbow transition for many times in the prior art, can be directly connected through the hose, reduces the material cost of pipeline connection, also reduces the difficulty of pipeline installation, and simultaneously avoids the risk of untight sealing of the pipeline caused by multi-connection.

Drawings

FIG. 1 is a step frame diagram of a method for manufacturing an aluminum lower exhaust pipe of a double-cylinder pendulum oil-free air compressor according to the present invention;

fig. 2 is a schematic view of a molded product of a manufacturing method of an aluminum lower exhaust pipe of the double-cylinder pendulum oil-free air compressor of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a technical scheme that: a manufacturing method of an aluminum lower exhaust pipe of a double-cylinder pendulum oil-free air compressor comprises the following manufacturing steps: s1, high-temperature melting, exhausting and removing impurities: placing the alloy aluminum ingot in a high-temperature smelting furnace to be smelted into high-temperature aluminum liquid, fully stirring the aluminum liquid after the aluminum liquid is completely smelted to remove air in the aluminum liquid, removing impurities on the surface of the aluminum liquid, keeping the temperature of the smelting furnace, and keeping the aluminum liquid for later use; s2, fixing the mold: placing the metal mold on casting equipment, fixing firmly, checking the running state of the metal mold, and arranging an exhaust hole and a casting head on the metal mold; s3, brushing a release agent: coating a mold release agent on a sand core mold responsible for the inner wall shape and core molding of a product, and placing the mold release agent on a sand core machine; s4, forming a sand core: placing the precoated sand with the granularity of 100-plus-200 meshes into a sand core mold, and compacting the precoated sand through vibration of a sand core machine to form a sand core for later use; s5, placing a movable block: opening a metal mold, placing the movable block at the bending position at the mold positioning position, and then placing the manufactured sand core in the mold; s6, die assembly and aluminum liquid pouring: closing the die, and pouring the aluminum liquid into the die cavity through a casting head to form a product; s7, opening the mould and taking out: opening the mould to take out the formed product, taking down the movable block at the bent part of the product and shattering the sand core in the inner cavity of the product to take out the sand core; s8, deburring to obtain a finished product: and removing redundant pouring channels and burrs on the product, and performing subsequent processing procedures to obtain a finished product.

The upper and lower templates of the metal mold are 7-shaped, the middle bent part adopts a movable block form, the upper template is provided with an exhaust groove and a pouring gate, the upper part of the mold is provided with a pouring head, the upper and lower templates are combined to form a closed inner cavity, and the mold is provided with a plurality of sets of movable blocks, so that the continuous production of products is facilitated.

The whole sand core is formed by combining a plurality of small sand cores into a set of complete sand core, the sand core is prefabricated by matching a plurality of sand core molds with a sand core machine, the sand core molds are made of carbon steel and are provided with ejection mechanisms, the strength is high, the ejection of the sand core molds can be directly controlled, and the unloading is convenient.

The formed product comprises a main pipe, a main pipe exhaust flange, a branch pipe and a branch pipe intake flange which are formed integrally, and the formed product is simple in structure, high in strength and high in stability.

Example 1

The invention provides a technical scheme that: a manufacturing method of an aluminum lower exhaust pipe of a double-cylinder pendulum oil-free air compressor is characterized by comprising the following manufacturing steps:

s1, high-temperature melting, exhausting and removing impurities: placing the alloy aluminum ingot in a high-temperature smelting furnace to be smelted into high-temperature aluminum liquid, fully stirring the aluminum liquid after the aluminum liquid is completely smelted to remove air in the aluminum liquid, removing impurities on the surface of the aluminum liquid, keeping the temperature of the smelting furnace, and keeping the aluminum liquid for later use;

s2, fixing the mold: placing the metal mold on casting equipment, fixing firmly, checking the running state of the metal mold, and arranging an exhaust hole and a casting head on the metal mold;

s3, brushing a release agent: coating a mold release agent on a sand core mold responsible for the inner wall shape and core molding of a product, and placing the mold release agent on a sand core machine;

s4, forming a sand core: placing the precoated sand with the granularity of 100 meshes into a sand core mold, and compacting the precoated sand through vibration of a sand core machine to form a sand core for later use;

s5, placing a movable block: opening a metal mold, placing the movable block at the bending position at the mold positioning position, and then placing the manufactured sand core in the mold;

s6, die assembly and aluminum liquid pouring: closing the die, and pouring the aluminum liquid into the die cavity through a casting head to form a product;

s7, opening the mould and taking out: opening the mould to take out the formed product, taking down the movable block at the bent part of the product and shattering the sand core in the inner cavity of the product to take out the sand core;

s8, deburring to obtain a finished product: and removing redundant pouring channels and burrs on the product, and performing subsequent processing procedures to obtain a finished product.

Example 2

The invention provides a technical scheme that: a manufacturing method of an aluminum lower exhaust pipe of a double-cylinder pendulum oil-free air compressor is characterized by comprising the following manufacturing steps:

s1, high-temperature melting, exhausting and removing impurities: placing the alloy aluminum ingot in a high-temperature smelting furnace to be smelted into high-temperature aluminum liquid, fully stirring the aluminum liquid after the aluminum liquid is completely smelted to remove air in the aluminum liquid, removing impurities on the surface of the aluminum liquid, keeping the temperature of the smelting furnace, and keeping the aluminum liquid for later use;

s2, fixing the mold: placing the metal mold on casting equipment, fixing firmly, checking the running state of the metal mold, and arranging an exhaust hole and a casting head on the metal mold;

s3, brushing a release agent: coating a mold release agent on a sand core mold responsible for the inner wall shape and core molding of a product, and placing the mold release agent on a sand core machine;

s4, forming a sand core: placing the precoated sand with the granularity of 200 meshes in a sand core mold, and compacting the precoated sand through vibration of a sand core machine to form a sand core for later use;

s5, placing a movable block: opening a metal mold, placing the movable block at the bending position at the mold positioning position, and then placing the manufactured sand core in the mold;

s6, die assembly and aluminum liquid pouring: closing the die, and pouring the aluminum liquid into the die cavity through a casting head to form a product;

s7, opening the mould and taking out: opening the mould to take out the formed product, taking down the movable block at the bent part of the product and shattering the sand core in the inner cavity of the product to take out the sand core;

s8, deburring to obtain a finished product: and removing redundant pouring channels and burrs on the product, and performing subsequent processing procedures to obtain a finished product.

The precoated sand with the granularity of 100 meshes is placed in the sand core mold, so that the compactness of the formed sand core is effectively improved, the structural strength is high, the hardness is high, the stability is high, and the selection example 1 is better.

The table of the parameters of the invention is as follows:

	degree of compactness	Stability of	Volume to volume ratio	Impact resistance
					Example 1	90％	80％	50％	85％
Example 2	55％	65％	80％	70％

In summary, the manufacturing method of the aluminum lower exhaust pipe of the double-cylinder pendulum oil-free air compressor provided by the invention has the advantages that the integral forming manufacturing method replaces the original multi-part assembly technology, the defect that the pipeline can be connected on the conveying pipeline only by carrying out multiple 90-degree elbow transition on the pipeline in the original technology is overcome, the pipeline can be directly connected through the hose, the material cost of pipeline connection is reduced, the difficulty of pipeline installation is also reduced, the risk of untight sealing of the pipeline caused by multiple connection is avoided, the mold manufacturing speed is high, the quality is high, the efficient continuous production is facilitated, and the processing efficiency is improved.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (4)

1. A manufacturing method of an aluminum lower exhaust pipe of a double-cylinder pendulum oil-free air compressor is characterized by comprising the following manufacturing steps:

s1, high-temperature melting, exhausting and removing impurities: placing the alloy aluminum ingot in a high-temperature smelting furnace to be smelted into high-temperature aluminum liquid, fully stirring the aluminum liquid after the aluminum liquid is completely smelted to remove air in the aluminum liquid, removing impurities on the surface of the aluminum liquid, keeping the temperature of the smelting furnace, and keeping the aluminum liquid for later use;

s2, fixing the mold: placing the metal mold on casting equipment, fixing firmly, checking the running state of the metal mold, and arranging an exhaust hole and a casting head on the metal mold;

s3, brushing a release agent: coating a mold release agent on a sand core mold responsible for the inner wall shape and core molding of a product, and placing the mold release agent on a sand core machine;

s4, forming a sand core: placing the precoated sand with the granularity of 100-plus-200 meshes into a sand core mold, and compacting the precoated sand through vibration of a sand core machine to form a sand core for later use;

s5, placing a movable block: opening a metal mold, placing the movable block at the bending position at the mold positioning position, and then placing the manufactured sand core in the mold;

s6, die assembly and aluminum liquid pouring: closing the die, and pouring the aluminum liquid into the die cavity through a casting head to form a product;

s7, opening the mould and taking out: opening the mould to take out the formed product, taking down the movable block at the bent part of the product and shattering the sand core in the inner cavity of the product to take out the sand core;

s8, deburring to obtain a finished product: and removing redundant pouring channels and burrs on the product, and performing subsequent processing procedures to obtain a finished product.

2. The method for manufacturing the aluminum lower exhaust pipe of the double-cylinder pendulum oil-free air compressor as claimed in claim 1, wherein the upper and lower mold plates of the metal mold are 7-shaped, the middle bent portion is in the form of a movable block, the upper mold plate is provided with an exhaust groove and a pouring gate, the upper portion of the mold is provided with a casting head, and the upper and lower mold plates are combined to form a closed inner cavity.

3. The method for manufacturing the aluminum lower exhaust pipe of the double-cylinder pendulum oil-free air compressor as claimed in claim 1, wherein the whole sand core is formed by combining a plurality of small sand cores into a set of complete sand core, the sand core is prefabricated by matching a plurality of sand core molds with a sand core machine, and the sand core molds are made of carbon steel and provided with an ejection mechanism.

4. The method for manufacturing the aluminum lower exhaust pipe of the double-cylinder pendulum oil-free air compressor as claimed in claim 1, wherein the molded product comprises a main pipe, a main pipe exhaust flange, a branch pipe and a branch pipe intake flange which are integrally molded.

Images