Simulation measurement and calculation method for piston weight

Abstract

The invention relates to a piston weight simulation measurement and calculation method. The volume of a to-be-machined part of a piston after being cut is calculated by using a formula; and subtracting the sum of the cut weights of the to-be-machined parts from the weighed weight of the piston object before machining to obtain the weight of the finished piston. The diameter value of the to-be-processed part of the piston is filled into a table of a simulation algorithm by using measuring tools such as a vernier caliper, so that the processing weight of the piston can be quickly obtained and is compared with a standard value to judge whether the piston is qualified or not.

Description

Technical Field

[0001] The present invention relates to the technical field of piston weight measurement, and in particular to a simulation measurement method for piston weight. Background Art

[0002] Piston weight is an important factor in evaluating piston quality, especially for pistons in multi-cylinder engines. The smaller the weight difference, the smoother the engine runs. Conversely, the greater the difference, the greater the wear, vibration, and failure rate. However, the weight of the piston is basically determined during casting, and the adjustable space for processing is extremely limited. In order to ensure the reliability of the blank quality, a formula method is designed to simulate and calculate the piston weight to ensure that the weight of the blank after processing meets the design requirements. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for simulating and calculating the weight of a piston.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] Regarding the simulation calculation method of the piston weight, the volume of the piston after the part to be processed is calculated using the formula;

[0006] The formula is: V = π × |D2 × D2-D1 × D1| / 4 × H × M;

[0007] Wherein, D1 is the actual measured size of the piston part to be processed before processing, D2 is the drawing size of the piston part to be processed, H is the processing height or depth of the piston part to be processed, and M is the actual number of the piston parts to be processed;

[0008] Using G = ρ × V / 1000, the weight of each piston part to be processed is obtained, where ρ is the material density of the piston;

[0009] The weight of the finished piston is obtained by subtracting the sum of the weights of the parts to be processed from the actual weight of the piston before processing.

[0010] If the weight of the finished piston is within the standard value range of the piston weight, it is judged to be qualified, otherwise it is judged to be unqualified.

[0011] By adopting the above technical solution and using measuring tools such as vernier calipers to fill in the diameter value of the piston to be processed into the table of the simulation algorithm, the weight of the piston processing can be quickly obtained and compared with the standard value to determine whether it is qualified. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0013] Figure 1 Schematic diagram of the size of the piston in the embodiment. DETAILED DESCRIPTION

[0014] The present invention relates to a method for simulating and calculating the weight of a piston, and uses a formula to calculate the volume of the piston after the part to be processed is cut;

[0015] The formula is: V = π × |D2 × D2-D1 × D1| / 4 × H × M;

[0016] Wherein, D1 is the actual measured size of the piston part to be processed before processing, D2 is the drawing size of the piston part to be processed, H is the processing height or depth of the piston part to be processed, and M is the actual number of the piston parts to be processed;

[0017] Using G = ρ × V / 1000, the weight of each piston part to be processed is obtained, where ρ is the material density of the piston;

[0018] The weight of the finished piston is obtained by subtracting the sum of the weights of the parts to be processed from the actual weight of the piston before processing. If the weight of the finished piston is within the standard value range of the piston weight, it is judged as qualified, otherwise it is judged as unqualified.

[0019] like Figure 1 As shown, the specific embodiment takes the following table as an example, where, since the retaining ring is in the middle of the pin hole, it is impossible to measure directly in actual production. At the same time, because the retaining ring is processed on the basis of turning the pin hole, the D1 dimension of the retaining ring is taken from the drawing dimension D2 of the pin hole. In addition, the inner diameter of the piston is only processed for half a circle, so the number is taken as 0.5.

[0020]

[0021] The weight of the finished piston after processing obtained by the measuring method of the present invention is 54.15g, which is within the standard value range of 54±2g, and the product is judged to be qualified.

[0022] The above describes a specific embodiment of the present invention, but those skilled in the art should understand that this is only an example. Those skilled in the art can make various changes or modifications to this embodiment without departing from the principle and essence of the present invention, but these changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A method for simulating and calculating piston weight, characterized in that: The volume of the piston after the part to be processed is calculated using the formula; The formula is: V = π × | D2 × D2 - D1 × D1 | / 4 × H × M; Wherein, D1 is the actual measured size of the piston part to be processed before processing, D2 is the drawing size of the piston part to be processed, H is the processing height or depth of the piston part to be processed, and M is the actual number of the piston parts to be processed; Using G=ρ×V / 1000, the weight of each piston part to be processed is obtained, where ρ is the material density of the piston; The weight of the finished piston is obtained by subtracting the sum of the weights of the parts to be processed from the actual weight of the piston before processing. If the weight of the finished piston is within the standard value range of the piston weight, it is judged to be qualified, otherwise it is judged to be unqualified.

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