How to estimate labor, and what actual conditions should be paid attention to when evaluating labor?
Estimated labor is based on long-term production practice, selects professional and reasonable production efficiency, and draws the standard of man-hours consumed according to the actual situation. In the actual calculation, the following specific situations should be paid attention to:
(1) According to the coating of different grades of products, the man-hours consumed are calculated separately.
(2) Calculate according to the complexity of product modeling. For example, painted flat products, products with many lines or engraved patterns, in terms of the man-hours required for a complete set of construction process, there is a big gap, so it should be calculated according to its complexity.
(3) According to the different coatings selected, calculate the required working hours respectively, such as nitro paint and polyurethane paint, the former is brush coating, and the latter is brush coating. Due to the high content of film-forming substances in polyurethane paint and different construction methods, brushing polyurethane paint can reduce the number of coating processes and layers under the same quality conditions, so the man-hours consumed are shorter than those of nitrocellulose paint. Much less paint.
(4) According to the viscosity of the paint and the degree of dry operation, calculate the required man-hours. The paint with high viscosity consumes more labor, and the paint with slow drying operation also consumes more labor.
(5) According to the difference between manual operation and mechanical operation and their degrees, the working hours should also be calculated separately.
How to accurately estimate the required amount of paint?
Before construction, the painter must first calculate how much paint will be used. For example, how much paint, stone tone powder, and other materials are needed to paint a set of furniture must be estimated by the painter. Estimates must be accurate. Overestimation will result in backlog and waste, and underestimation will cause construction delays. Therefore, estimates should be made based on professional and reasonable quotas and accumulated experience, and a material budget should be proposed.
(1) Calculation formula m=S><j
In the formula, m—consumption of each coating film, grams;
S—the total area of the product, square meters;
f-paint hiding power, g/m2;
y-coating utilization rate, %.
The amount calculated by the above formula is the paint consumption of each coating film. It is only a reference number and needs to be adjusted according to the actual situation.
(2) Empirical estimation method
Painters usually do a good job of accumulating experience, such as using a Spray Gun for construction, how much pressure, how big the nozzle is, how much the spraying distance is, how much paint can be filled in one gun, what color, and the viscosity during construction, etc., all have to be recorded one by one, and accumulate over time. , can get a lot of practical and useful data, and provide a reliable basis for estimating materials in the future. Of course, the empirical estimation method is difficult for beginners to master, but as long as more attention is paid to accumulating empirical data in the work, the empirical estimation method will be gradually selected to estimate the materials used. This method is the most practical and convenient method of estimation.
What factors determine the consumption quota of paint?
The size of the paint consumption quota depends on the following factors:
(1) The characteristics of the paint itself. For paints with dark colors and strong hiding power, the consumption quota is low; for paints with light colors and poor hiding power, the consumption quota is high. Under the condition of the same coating thickness, the paint with high density and low hiding power will have a higher consumption rate, and vice versa.
(2) Coating method. If the coating method with high coating efficiency is adopted, the material consumption quota will be low; and when spraying is used, the paint consumption quota will be high.
(3) The material, shape and size of the object to be coated. When painting wood and concrete products, the consumption quota is larger than that of metal parts; the consumption quota of special parts is larger than that of sheet metal stamping parts; in the case of spraying, the consumption quota of flat objects is more complex than that of the shape The small pieces should be small.
(4) Operating proficiency. For manual painting, skilled workers or workers who know the essentials of operation, the consumption is less and the material utilization rate is high.
