Implementation method for preparing reserved cooling pipe through piston

Abstract

The invention provides an implementation method for preparing a reserved cooling pipe from a piston, and the implementation method comprises the following steps: S1, during piston injection molding, placing an arc-shaped salt core in two sides of a piston injection molding lower mold, and limiting the arc-shaped salt core through the lower mold; s2, the upper mold is pressed downwards, an injection molding opening is formed, and injection molding is conducted on the mold through an injection molding pipe; s3, a piston is formed, after cooling, the arc-shaped salt core is left in the piston, a pipeline is formed, the arc-shaped salt core is flushed out of the piston through high-pressure flushing, and therefore a cooling pipe is formed on the piston; the cooling pipeline can be reserved on the piston when the piston is prepared, and the cooling effect is conveniently achieved when the piston is used.

Description

Technical Field

[0001] The invention relates to the technical field of piston production and preparation, in particular to a method for realizing a reserved cooling tube in piston preparation. Background Art

[0002] The production process of a machine refers to the entire process of making a product from raw materials (or semi-finished products). For machine production, it includes the transportation and storage of raw materials, preparation for production, manufacturing of blanks, processing and heat treatment of parts, assembly and debugging of products, painting and packaging, etc. The content of the production process is very extensive. Modern enterprises use the principles and methods of systems engineering to organize and guide production, and regard the production process as a production system with input and output.

[0003] The piston is a reciprocating part in the cylinder block of a car engine. The basic structure of the piston can be divided into the top, the head and the skirt. The top of the piston is the main part of the combustion chamber, and its shape is related to the type of combustion chamber selected. Gasoline engines mostly use flat-top pistons, which have the advantage of a small heat absorption area. There are often various pits on the top of the diesel engine piston, and their specific shape, position and size must be adapted to the requirements of the diesel engine's mixture formation and combustion.

[0004] The engine ignites the fuel in the cylinder, which expands due to heat and pushes the piston to reciprocate. The linear motion of the piston is converted into circular motion through the connecting rod and the crankshaft. Therefore, the piston needs to work under high temperature, high pressure and high speed working conditions. The heat dissipation capacity of the piston itself is poor, and the piston needs to be effectively cooled. The traditional cooling technology uses self-use jet top and bottom cooling, that is, the inner top of the piston is continuously cooled by a high-speed jet oil column and a middle brush to dissipate heat. However, this method can only cool the center of the top of the piston, and the cooling effect of the piston ring land is poor. It is easy to cause a large temperature difference stress between the inner and outer surfaces of the piston head. In addition, the cooling oil does not completely contact the piston when it is sprayed, and a large amount of cooling oil splashes to the outside of the piston, and the utilization efficiency of the cooling oil is low. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a method for preparing a piston with a reserved cooling pipe, which can reserve a cooling pipe on the piston during the preparation of the piston, so as to facilitate cooling of the piston during use.

[0006] The present invention is implemented by the following method: a method for preparing a piston with a reserved cooling tube, the method comprising the following steps: Step S1, during piston injection molding, an arc-shaped salt core is placed on both sides of the piston injection lower mold and is limited by the lower mold; Step S2, then pressing the upper mold downward to form an injection molding port, and performing injection molding on the mold through an injection molding tube; Step S3, forming a piston, after cooling, the arc-shaped salt core will be retained in the piston to form a pipeline, and the arc-shaped salt core will be flushed out of the piston by high-pressure flushing, thereby forming a cooling tube on the piston.

[0007] Furthermore, the lower injection mold in step S1 includes a first mold base and a second mold base, and the first mold base and the second mold base are both provided with an injection molding arc groove, and a limit block for limiting the arc salt core is provided at the upper end of the injection molding arc groove, and an injection port is provided at the front end after the first mold base and the second mold base are matched.

[0008] Furthermore, it also includes a supporting base, wherein guide rail grooves are provided at both left and right ends of the upper surface of the supporting base, and fixed blocks are arranged at both left and right ends of the upper surface of the supporting base. Moving blocks are arranged on the lower surfaces of the first mold base and the second mold base, and guide wheels are arranged around the lower surfaces of the moving blocks, and the guide wheels are embedded in the guide rail grooves. The fixed block at the left end is spirally embedded with a screw, and the end of the screw is connected to the first mold base. The fixed block at the right end is embedded with a first telescopic cylinder, and the end of the telescopic rod of the first telescopic cylinder is connected to the second mold base.

[0009] Furthermore, a gantry is provided on the upper surface of the support base, a second telescopic cylinder is embedded on the horizontal plate of the gantry, and the upper mold is provided at the end of the telescopic rod of the second telescopic cylinder.

[0010] The beneficial effects of the present invention are as follows: the present invention can reserve a cooling pipe through the effect of the salt core when the piston is cast, so that a cooling pipe can be reserved on the manufactured piston, so that the piston can be better cooled when in use, and cooling oil can enter the interior of the piston, so that the contact area between the cooling pipe and the piston becomes larger, and the piston is cooled more evenly and fully; the present invention has a simple structure and is easy to operate, and can effectively save manpower and material resources and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the method flow of the present invention.

[0012] Figure 2 It is a schematic diagram of the structure of the present invention.

[0013] Figure 3 It is a structural schematic diagram of the lower mold.

[0014] Figure 4 It is the front view of the lower mold.

[0015] Figure 5 A top view of the finished piston. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] See also Figure 1 and Figure 5 As shown, the present invention provides: a method for preparing a piston with a reserved cooling tube, the method comprising the following steps: Step S1, during piston injection molding, an arc-shaped salt core is placed on both sides of the piston injection lower mold and limited by the lower mold; in this way, the arc-shaped salt core can stand upright in the lower mold, and after injection molding, the arc-shaped salt core can form a channel in the piston, thereby reserving a cooling channel after the piston is injection molded.

[0018] Step S2, then press the upper mold downward to form an injection molding port, and perform injection molding on the mold through an injection molding tube; thereby achieving the injection molding effect of the piston.

[0019] Step S3, forming a piston, after cooling, the arc-shaped salt core will be retained in the piston to form a pipeline, and the arc-shaped salt core will be flushed out of the piston by high-pressure flushing, so as to form a cooling pipe on the piston. Through the function of the cooling pipe, cooling oil can be passed into the piston when the piston is used, so as to achieve the cooling effect of the piston.

[0020] Please continue reading Figures 2 to 4 As shown, in one embodiment of the present invention, the lower injection mold in step S1 includes a first mold base 1 and a second mold base 2, and both the first mold base 1 and the second mold base 2 are provided with an injection molding arc groove 3, and a limit block 4 for limiting the arc salt core is provided at the upper end of the injection molding arc groove 3, and an injection port 5 is provided at the front end after the first mold base 1 and the second mold base 2 are matched. The molten iron can be injected into the injection molding arc groove 3 through the injection port 5, and then the arc salt core is placed in the injection molding arc groove 3 first, and is limited by the limit block 4, so that after the piston is injection molded, the arc salt core will form a channel in the molding piston, and the salt core is flushed out of the channel by high-pressure flushing, thereby forming a cooling pipeline.

[0021] Please continue reading Figure 2As shown, in one embodiment of the present invention, a support base 6 is further included, and the left and right ends of the upper surface of the support base 6 are provided with guide rail grooves 61, and the left and right ends of the upper surface of the support base 6 are provided with fixed blocks 62, and the lower surfaces of the first mold base 1 and the second mold base 2 are provided with moving blocks 63, and the lower surfaces of the moving blocks 63 are provided with guide wheels 64 around, and the guide wheels 64 are embedded in the guide rail grooves 61, and the left end of the fixed block 62 is spirally embedded with a screw 65, and the end of the screw 65 is connected to the first mold base 1, and the right end of the fixed block 62 is embedded with a first telescopic cylinder 66, and the end of the telescopic rod of the first telescopic cylinder 66 is connected to the second mold base 2. By rotating the screw 65, the first mold base 1 can be driven to move left and right in the guide rail groove 61, and the second mold base 2 can be driven to move left and right by the first telescopic cylinder 66, and the first mold base 1 can be matched with the first mold base to realize the splicing molding of the lower mold, which is convenient for piston casting.

[0022] Please continue reading Figure 2 As shown, in one embodiment of the present invention, a gantry 7 is provided on the upper surface of the support base 6, a second telescopic cylinder 71 is embedded on the horizontal plate of the gantry 7, and the upper mold 8 is provided at the end of the telescopic rod of the second telescopic cylinder 71. The second telescopic cylinder 71 can drive the upper mold 8 to rise and fall, so that it can cooperate with the lower mold to achieve piston pressing molding.

[0023] The telescopic cylinder in the present invention is a prior art, which can be clearly understood by those skilled in the art and will not be described in detail here.

[0024] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. A method for preparing a piston with a reserved cooling tube, characterized in that: The implementation method comprises the following steps: Step S1, during piston injection molding, an arc-shaped salt core is placed on both sides of the piston injection lower mold and is limited by the lower mold; Step S2, then pressing the upper mold downward to form an injection molding port, and performing injection molding on the mold through an injection molding tube; Step S3, forming a piston, after cooling, the arc-shaped salt core will be retained in the piston to form a pipeline, and the arc-shaped salt core is flushed out of the piston by high-pressure flushing, thereby forming a cooling tube on the piston.

2. The method for preparing a piston with a reserved cooling tube according to claim 1, characterized in that: The lower injection mold in step S1 includes a first mold base and a second mold base, both of which are provided with an injection molding arc groove, and a limiting block for limiting the arc-shaped salt core is provided at the upper end of the injection molding arc groove, and an injection port is provided at the front end after the first mold base and the second mold base are matched.

3. The method for preparing a piston with a reserved cooling tube according to claim 2, characterized in that: It also includes a support base, wherein guide rail grooves are provided at both left and right ends of the upper surface of the support base, fixed blocks are provided at both left and right ends of the upper surface of the support base, movable blocks are provided on the lower surfaces of the first mold base and the second mold base, guide wheels are provided around the lower surfaces of the movable blocks, and the guide wheels are embedded in the guide rail grooves, a screw is spirally embedded in the fixed block at the left end, and the end of the screw is connected to the first mold base, and a first telescopic cylinder is embedded in the fixed block at the right end, and the end of the telescopic rod of the first telescopic cylinder is connected to the second mold base.

4. The method for preparing a piston with a reserved cooling tube according to claim 3, characterized in that: A gantry is provided on the upper surface of the support base, a second telescopic cylinder is embedded on the horizontal plate of the gantry, and the upper mold is provided at the end of the telescopic rod of the second telescopic cylinder.

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