Blank manufacturing method of tractor transmission

A manufacturing method and gearbox technology, applied in manufacturing tools, molding machines, casting and molding equipment, etc., can solve problems such as high requirements for workers' skilled operation skills, uncertain dimensions of blanks, and large labor workload for workers, reducing machinery and equipment. The effect of processing volume, realizing automatic production and reducing casting defects

Inactive Publication Date: 2016-12-07
李向阳
6 Cites 0 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0002] The tractor gearbox is an important part of the tractor. Due to the need to install various parts inside, its structure and shape are relatively complicated. Most of its manufacturers use metal casting to produce blanks, and then perform machining in order to obtain better Stability and machining accuracy; Most of the existing tractor gearbox blanks are cast with cast iron. The casting method is to first select the appropriate parting surface according to the gearbox design drawings, and make a combined model with the same shape as the gearbox. Most of the composite models are bounded by the parting surface as the joint surface of the composite model. Most of these models are made of wood or aluminum for handling and processing; The box is separated to take out the model, and a cavity with the same shape as the model is formed in the middle of the sand in the sand box, and then the casting channel and riser are made to complete the sand mold making before casting; thirdly, the sand mold is properly dried F...
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Abstract

The invention discloses a blank manufacturing method of a tractor transmission, and belongs to the field of agricultural machinery. The blank manufacturing method comprises the following steps: (1) the tractor transmission is divided into upper and lower two parts according to a design drawing of the tractor transmission for respectively designing and manufacturing tractor transmission precoated sand molds; (2) the tractor transmission precoated sand molds are put on an automatic molding machine to manufacture a precoated sand pouring sand shell model and a sand core model; (3) the pouring is performed; and (4) a casting is taken out and cleaned. The blank manufacturing method has the characteristics of capability of efficiently realizing blank production of the tractor transmission, saving of materials and labors, reduction of the mechanical loading quantity, reduction of casting defects, improvement of the yield and easy realization of the automatic production.

Application Domain

Foundry mouldsMoulding machines +2

Technology Topic

SHELL modelCasting defect +3

Image

  • Blank manufacturing method of tractor transmission
  • Blank manufacturing method of tractor transmission
  • Blank manufacturing method of tractor transmission

Examples

  • Experimental program(1)

Example Embodiment

[0050] In order to further illustrate the technical solution of the present invention, the specific embodiments of the present invention will now be described with reference to the accompanying drawings, such as Figure 1 to Figure 13 According to the design drawings of the tractor gearbox, in this example, the medium-sized tractor gearbox is taken as an example. The tractor gearbox is divided into upper and lower parts, and the outline size of the tractor gearbox is enlarged by 8-12 mm to make the upper part of the tractor gearbox. The upper sand shell upper mold 1 and the upper sand shell lower mold 2, the lower sand shell upper mold 3, the lower sand shell lower mold 4 of the shell mold and the lower sand shell mold are respectively made into the upper sand shell of the tractor gearbox and the tractor gearbox Lower sand shell; combine the upper sand shell of the tractor gearbox and the lower sand shell of the tractor gearbox to complete a complete sand shell with the same shape as the tractor gearbox; at the same time, divide the internal shape of the tractor gearbox into the upper part in the same way as the external shape. And the lower part, respectively make the upper sand core mold and the lower sand core mold of the tractor gearbox, which are the upper sand core upper mold 5, the upper sand core lower mold 6, the lower sand core upper mold 7 and the upper sand core lower mold 8. The upper sand core and the lower sand core are combined to form a complete shape of the inner cavity of the tractor gearbox; in this example, each set of molds is used to make the upper and lower sand shells and sand cores of the tractor gearbox at the same time; and the tractor gearbox sand shell and The sand core mold is installed on the sand shell sand core automatic forming machine to produce a sand shell with the same shape as the tractor gearbox housing 01 and a sand core with the same shape as the tractor gearbox cavity 02; the finished sand shell of the tractor gearbox Place the sand core on the pouring site, put the sand core into the sand shell according to the structure of the tractor gearbox, pour the molten iron with a good proportion into the sand shell, after cooling, open the sand shell, take out the casting, and connect the gate and The riser is removed, and impurities on the casting blank are cleaned, and the production of the brake disc blank is completed.
[0051] Because the sand shell and sand core are produced automatically during production, they can be mass-produced, which overcomes the complexity of clay sand or resin sand modeling, saves a lot of modeling sand, reduces production costs and labor intensity; at the same time, sand shell and sand core molds It has a long service life and overcomes the shortcomings of wooden or aluminum molds that are not durable.

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Description & Claims & Application Information

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