CN206839048U - A bearing seat coated sand mold - Google Patents

Abstract

A bearing seat precoated sand mold belongs to the field of mechanical equipment production and comprises an upper mold and a lower mold; the upper die is used for manufacturing the shape of the upper part of the bearing seat; the lower die is used for manufacturing the shape of the lower part of the bearing seat; the upper die and the lower die are folded to form a complete shape of a complete bearing seat, and the bearing seat blank production device has the characteristics of being capable of efficiently realizing production of a bearing seat blank, saving materials and manpower, reducing machining amount, reducing casting defects, improving yield and easily realizing automatic production.

Description

A bearing seat coated sand mold

technical field

The invention belongs to the field of mechanical equipment production, in particular to a film-coated sand mold for a bearing seat.

Background technique

The bearing seat is the supporting part of the bearing, usually in the shape of a box; as shown in Figure 1, the inner cavity of the bearing seat needs to adapt to the shape of the outer ring of the bearing, and the outer shell of the bearing seat needs to adapt to various installation environments, so its structure and shape are relatively complicated. Most of its producers use metal casting to produce blanks, and then perform machining to obtain better stability and processing accuracy; most of the existing bearing seat blanks are cast with cast iron, and the casting method is firstly based on the design of the bearing seat. Drawings, select the appropriate parting surface, and make a combined model with the same shape as the bearing seat. Most of these combined models use the parting surface as the boundary of the combined model as the joint surface of the combined model. Most of these models are made of wood or aluminum for handling and handling. Processing; secondly, put the model into the sand box, fill it with casting sand and tamp it down, separate the sand box and take out the model, a cavity with the same shape as the model is formed in the middle of the sand in the sand box, and then make a casting channel and the riser to complete the sand mold making before casting; third, after the sand mold is properly dried, the sand box is closed, and the casting metal liquid is poured into the casting channel; fourth, the sand box is removed after cooling, Break the sand mold, take out the casting, take out the gate and the riser, and the production of the bearing seat blank is completed; when the molten iron is poured into the sand mold, the molten iron has an expansion force on the sand mold, and the sand mold is relatively soft, which will make the inner cavity of the sand mold The shape changes, and this change is uncertain, which causes the shape and size of the cast blank to be uncertain; due to the characteristics of the above process, the casting method has a large amount of labor for the workers and requires high skilled operation skills for the workers. It requires large working area, poor working environment, large dust, high surface roughness of castings, large amount of reserved processing, waste of raw materials, easy to change, low qualified yield and other defects.

Contents of the invention

Aiming at the above-mentioned problems existing in the production of existing bearing seat blanks, the present invention proposes a bearing seat blank manufacturing method, which is characterized in that it includes the following steps: 1. Divide the bearing seat into upper and lower parts according to the design drawing of the bearing seat, Design and manufacture the coated sand mold of the bearing seat respectively; 2. Put the coated sand mold of the bearing seat on the automatic forming machine to make the coated sand casting sand shell model; 3. Pouring; 4. Take out the casting and clean it.

The bearing seat coated sand mold described in the step 1 refers to a mold made of steel material for making a sand shell model; it is characterized in that it includes an upper mold and a lower mold; the upper mold is used for The shape of the upper part of the bearing seat is made; the lower mold is used to make the shape of the lower part of the bearing seat; the upper mold and the lower mold are closed to form the complete shape of the bearing seat.

The upper mold is characterized in that it includes an upper template, an upper outer cavity, an upper inner cavity, a positioning hole, a sand inlet, a vent hole, a mounting hole, a gate core, and a riser core; the upper template It is located on the periphery of the upper outer cavity and is made of steel material; the upper outer cavity is located on the inside and outside of the upper template; the shape of the upper outer cavity is the same as the shape of the outer ring on the parting surface of the sand shell ; The size of the upper outer cavity is equal to the external dimensions of the outer ring part of the parting surface of the sand shell plus the design thickness of the sand shell; the upper inner cavity is located on the inner side of the upper template; The shape of the upper inner cavity is the same as the shape of the inner ring above the parting surface of the sand shell; the size of the upper inner cavity is equal to the outer dimension of the inner ring part above the parting surface of the sand shell plus the design of the sand shell Thickness; the number of the upper inner cavity is four, which are uniformly arranged on the inner side of the upper outer cavity; the positioning hole is located on the upper template, and after aligning with the positioning hole on the lower template, The size of the inner cavity forms the size of the sand shell plus the thickness of the sand shell; the sand inlet is set on the upper template on the upper part of the upper outer cavity, and communicates with the inside of the upper outer cavity and the upper inner cavity; The ventilation hole is arranged on the upper template, and communicates with the overflow channel between the upper outer cavity and the upper inner cavity; the installation hole is arranged on the upper template, and matches with the installation plate of the automatic sand shell forming machine; The gate core is arranged on the upper template, inside the upper outer cavity and outside the upper inner cavity; the riser core is arranged on the upper template, inside the upper outer cavity, and outside the upper inner cavity.

The lower die is characterized in that it includes a lower template, a lower outer cavity, a lower inner cavity, a positioning hole, a sand inlet, a ventilation hole, and an installation hole; the lower template is located at the periphery of the lower outer cavity, Made of iron and steel; the lower outer cavity is located inside and outside the lower formwork; the shape of the lower outer cavity is the same as the shape of the outer ring at the lower parting surface of the sand shell; the lower outer cavity The size is equal to the external dimensions of the outer ring part of the lower parting surface of the sand shell plus the design thickness of the sand shell; the lower inner cavity is located inside the lower template; the shape of the lower inner cavity is the same as that of the sand The shape of the inner ring at the lower part of the parting surface of the shell is the same; the size of the lower inner cavity is equal to the external dimension of the inner ring part at the lower part of the parting surface of the sand shell plus the design thickness of the sand shell; the lower inner mold There are four cavities, which are evenly distributed on the inside of the lower outer cavity; the positioning holes are located on the lower formwork, and after being aligned with the positioning holes on the upper formwork, the size of the inner cavity forms the size of the sand shell. Add the thickness of the sand shell; the sand inlet is set on the lower template on the upper part of the lower outer cavity, and communicates with the inside of the lower outer cavity and the lower inner cavity at the same time; the vent hole is arranged on the lower template, and The overflow channel between the lower outer mold cavity and the lower inner mold cavity is connected; the installation hole is arranged on the lower template and matches with the installation plate of the automatic sand shell molding machine.

The mark block is characterized in that it includes a block body and a mark; the block body is set on the lower mold; the mark is set on the upper surface of the block body.

The production of the sand shell in the step 2 refers to placing the coated sand mold of the bearing seat on the sand shell forming machine, injecting the coated sand inside it, pressurizing, heating, shaping and solidifying, and forming a bearing seat with a certain amount of mold for pouring. A hollow body with the same inner dimension of thickness as the outer dimension of the housing.

The sand shell automatic forming machine in the step 2 is a double-station coated sand sand shell automatic forming machine, which is characterized in that it includes a right formwork, a frame, a hydraulic system, a formwork moving device, and a formwork plate , a compressed air system, a control system, a sand box, a sand bucket, and a left formwork; the right formwork is installed on the right end of the formwork moving device, including a formwork plate, a mold plate, and a guide support rod; the frame includes Base, bracket, the base is installed on the lower part of the double-station coated sand sand shell automatic forming machine; the bracket is installed on the base; the hydraulic system includes a hydraulic station, a control element, and a hydraulic cylinder; the The formwork moving device is installed on the base, including a mobile workbench; the mobile workbench can move laterally on the base; Both ends of the support rod are connected; the compressed air system includes an air source, an air storage tank, and a cylinder; the control system includes a controller, a sensor, a programming device, and a parameter setting device; the sand box is installed on the frame above; the sand bucket is installed above the left formwork and the right formwork; the left formwork is installed on the left end of the formwork moving device and distributed symmetrically with the right formwork.

The third step refers to pouring into the cavity of the prepared coated sand shell into the molten iron whose ratio meets the requirements of the material components of the bearing seat.

The fourth step is to cool the coated sand shell poured with molten iron and collapse naturally, take out the internal casting, clean the sprue, riser, and residual impurities, and enter the next process for heat treatment and mechanical processing.

Beneficial effect

The invention has the beneficial effects of being able to efficiently realize the production of the blank of the bearing housing, saving materials and labor, reducing the amount of mechanical processing, reducing casting defects, improving the yield, and easily realizing automatic production.

Description of drawings

Fig. 1 is a schematic structural view of a bearing seat in the present invention

A. The inner cavity of the bearing seat; B. The outer shell of the bearing seat.

Figure 2 is a schematic diagram of the structure of the coated sand mold for the bearing seat

1. Upper mold; 2. Lower mold; 3. Sign block.

Fig. 3 is the structural representation of the upper mold of coated sand mold

10. Upper template; 11. Upper outer cavity; 12. Upper inner cavity; 13. Positioning hole; 14. Sand inlet; 15. Ventilation hole; 16. Installation hole; 17. Gate core; 18. Riser core.

Fig. 4 is the structural representation of the lower mold of coated sand mold

20. Lower template; 21. Lower outer cavity; 22. Lower inner cavity; 23. Positioning hole; 24. Sand inlet; 25. Ventilation hole; 26. Installation hole.

Fig. 5 is a structural schematic diagram of a marker block of a coated sand mold

31. Block; 32. Logo.

detailed description

In order to further illustrate the technical solution of the present invention, the specific implementation of the present invention is now described in conjunction with the accompanying drawings, as shown in Figures 1 to 4, according to the design drawings of the bearing seat, in this example, the small bearing seat is taken as an example, and the number of bearing seats is selected Four, set evenly, enlarge the outer dimension of the bearing seat by 8-12 mm, and make the coated sand mold of the bearing seat. In this example, the horizontal center plane of the bearing seat is selected as the pouring parting surface, and the parting surface is used as the boundary , make the upper mold 1 and the lower mold 2 respectively with the bearing seat coated sand mold centered on the bearing housing parting surface; on the upper mold 1 in this example, a steel plate with a thickness of 50 mm is used as the upper template 10, Upper outer cavity 11, upper inner cavity 12, positioning hole 13, sand inlet 14, vent hole 15, installation hole 16, gate core 17, riser core 18 are made respectively, and matched with the lower mold 2 , select the steel plate of thickness 50 millimeters to make the lower formwork 20 of lower mold 2 equally, and make respectively on lower formwork 20 lower outer mold cavity 21, lower inner mold cavity 22, positioning hole 23, sand inlet 24, air vent 25, Mounting hole 26, select the steel plate of thickness 10 millimeters to make the block body 31 of mark block 3, and process mark 32 on block body 31, mark block 3 is arranged on the upper die 1, and upper die 1 and lower die 2 cavity One side of the opening is relatively closed, and the positioning pins are respectively inserted into the positioning hole 18 and the positioning hole 28 to fix the positions to form a coated sand mold for the bearing seat; in this example, each set of molds is used to make the upper and lower sand shells of the bearing seat at the same time; Place the prepared sand shell of the bearing seat on the pouring site, pour molten iron with a good ratio into the sand shell, open the sand shell after cooling, take out the casting, remove the gate and riser, and clean the casting blank. impurities, the production of the blank of the bearing seat is completed.

Since the production of sand shells and sand cores is automatic production, which can be produced in large quantities, it overcomes the complexity of clay sand or resin sand molding, saves a lot of sand for molding, reduces production costs and labor intensity; at the same time, the sand shell mold has a long service life , to overcome the shortcomings of wood or aluminum molds are not durable.

Claims (1)

1. a kind of bearing block coated sand mold is characterized in that: comprise patrix, counterdie; Described patrix is used for making the shape of the top of bearing seat; Described lower mold is used for making the bottom of bearing seat Shape: After the upper mold and the lower mold are closed together, the complete shape of the complete bearing seat is formed.