Combined casting platform for large castings

Abstract

The utility model provides a combined casting platform for large castings, which is characterized in that the combined casting platform consists of a combined platform surface, a combined support and an exhaust system, a combined support and an exhaust system are mounted below the combined table board; a combined table top is a square casting platform formed by connecting a plurality of rectangular table tops, and a combined support is composed of a plurality of connecting plates, a plurality of supporting columns and a plurality of connecting pieces. A plurality of exhaust fans are arranged on the periphery below the combined table board to form a two-way exhaust system, so that the cooling capacity of the bottom of a casting mold is enhanced, and the solidification time of a casting is shortened. According to the utility model, an accurate casting platform is provided for the large casting, so that the casting allowance of the casting can be reduced, the product quality of the large casting is improved, and the production cost is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to foundry technology field especially relates to a combined casting platform of large -scale casting. BACKGROUND

[0002] At present, most ferrous metal foundry casting moulds are usually placed on the ground in the foundry workshop to carry out the whole process of pouring, solidification and cooling, and the completion process completely depends on the change of natural temperature. For most sequentially solidified castings, the riser needs to have efficient feeding capacity, such as the use of heat preservation riser or heat preservation and heating riser gradually expands, etc. However, these risers are expensive, which greatly increases the production cost. Especially for large ring type castings, multiple risers need to be set to meet the feeding requirements.

[0003] The sand box of large ring type casting is placed on the ground in the workshop, and the bottom heat dissipation is poor, which is not conducive to sequential solidification and the cooling time is long. It is easy to cause coarse grains of the casting, performance decline, even insufficient feeding, shrinkage and other casting defects, which greatly affect the quality of the casting product. Especially the sand box of large ring type casting is very large, which occupies a large area, thereby increasing the difficulty of pouring. In order to ensure that the casting meets the size requirements of the final product, a large machining allowance is often reserved, which further increases the production cost. UTILITY MODEL CONTENTS

[0004] The utility model in the light of the existing large ring type casting foundry casting problems in actual production, through the analysis of the process requirement of large ring type casting foundry, puts forward a kind of technical scheme of large casting combined casting platform, adopts vertical combined table top and two-way exhaust system, strengthens the cooling capacity of the bottom of casting mould, shortens the solidification time of casting, creates more perfect working environment for the casting of large casting, thereby improves the product quality of large casting.

[0005] The utility model is characterized by being composed of a combined table top, a combined support and an exhaust system; the combined table top is installed below the combined support and the exhaust system; wherein the combined table top is composed of a plurality of rectangular table tops, a plurality of ventilation holes are arranged on the rectangular table top, the plurality of ventilation holes are conical holes, the small holes are on the front end face of the rectangular table top, and the large holes are on the back of the rectangular table top. A raised reinforcing strip is arranged around the back of the rectangular table top, and a plurality of transverse reinforcing ribs are connected between the raised reinforcing strips along the length direction of the rectangular table top. The combined support is composed of a plurality of connecting plates, a plurality of support columns and a plurality of connecting pieces; the connecting plates connecting the rectangular table tops are installed above the plurality of support columns, and the support columns are cross-connected by the plurality of connecting pieces below; and the exhaust system is composed of a plurality of exhaust fans arranged around the combined table top below to form a two-way exhaust system.

[0006] The utility model discloses a further feature still lies in that the connecting piece is welded to the bottom of the connecting plate through the support column and the inverted triangular support plate.

[0007] The utility model discloses a further feature still lies in that the connecting piece is welded to the bottom of the connecting plate through the support column and the inverted triangular support plate.

[0008] The utility model discloses a further feature still lies in that the connecting piece is welded to the bottom of the connecting plate through the support column and the inverted triangular support plate.

[0009] The utility model discloses a further feature still lies in that the connecting piece is welded to the bottom of the connecting plate through the support column and the inverted triangular support plate. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is the assembly structure schematic drawing of the utility model casting platform;

[0011] Figure 2 It is the back surface structure component schematic drawing of the combination mesa 1 rectangle mesa;

[0012] Figure 3 It is the structure component schematic drawing of the combination support 2;

[0013] Figure 4 It is the structure component schematic drawing of the combination support 2 support column 2-2;

[0014] Figure 5 It is the section structure schematic drawing of the combination mesa 1 ventilation hole 1-3;

[0015] Wherein the serial number represents: combination table 1, rectangular table 1-1, convex reinforcing strip 1-2, transverse reinforcing rib 1-3, mounting through hole 1-4, ventilation hole 1-5; Combination support 2, connecting plate 2-1, support column 2-2, connecting piece 2-3; Exhaust system 3. DETAILED DESCRIPTION

[0016] The utility model is described in detail below with reference to the drawings and preferred exemplary embodiments. In order to clearly illustrate the utility model, the structural dimensions and area ranges in the drawings may be exaggerated or exaggerated, or some graphic structures are not shown in the case of clear textual description, but the size of these preferred embodiments and structures does not limit the utility model.

[0017] The utility model discloses a large -scale castings combined type foundry platform, especially be applied to large -scale ring type castings product. The combination table 1 of combined type foundry platform is composed of a plurality of rectangular table 1-1, and a square foundry platform is formed after a plurality of rectangular table 1-1 is combined. A plurality of tapered ventilation holes 1-5 are processed on the combination table 1, and the tapered ventilation hole 1-5 is small taper in the end face of the front surface of the combination table 1 and is large taper in the end face of the back surface of the combination table 1, to facilitate the heat transfer downward when the casting cools down and is discharged through the lower exhaust system. The convex reinforcing strip 1-2 is arranged on the back surface of the rectangular table 1-1 along the periphery thereof, and a plurality of transverse reinforcing ribs 1-3 are connected between the convex reinforcing strips 1-2 along the length direction of the rectangular table 1-1, so as to enhance the strength of the combination table 1 for bearing the large -scale casting. The convex reinforcing strip 1-2 and a plurality of transverse reinforcing ribs 1-3 are provided with bosses, and a plurality of mounting through holes 1-4 are processed on the bosses, so as to be connected with the combination support 2 below. The mounting through hole 1-4 on the end face of the combination table 1 is processed as a counterbore, and a countersunk bolt or a countersunk rivet fastener is used, the head of the fastener is completely embedded into the surface of the front surface of the combination table 1, so that the surface of the combination table 1 is very flat and will not form an operation obstacle.

[0018] The combination support 2 of the utility model is composed of a plurality of connecting plates 2-1 and a plurality of support columns 2-2 and a plurality of connecting pieces 2-3; a plurality of support columns 2-2 are installed below the connecting plate 2-1, and the plurality of support columns 2-2 are connected through the cross mode by the connecting piece 2-3, so as to enhance the stability of the support column 2-2. A plurality of combination supports 2 connect a plurality of adjacent two rectangular tables 1-1 through the connecting plate 2-1, so that a plurality of rectangular tables 1-1 form a square combination table 1 foundry platform after being combined.

[0019] The utility model discloses a connecting plate 2-1 selects channel steel, and the two rows of mounting holes corresponding with the position of installing through -hole 1-4 are processed on the connecting plate 2-1, and adjacent rectangular mesa 1-1 can be connected through bolt nut fastener. The utility model discloses welding the parallel inverted triangle support plate of support column 2-2 end face with the support column 2-2 of several above, the support column 2-2 of welding the inverted triangle support plate of several is welded in the below of connecting plate 2-1, and the mounting hole of the both ends of connecting piece 2-3 and the mounting hole of the middle and below welding joint end of support column 2-2 are connected through bolt nut cross, the bottom of support column 2-2 is welded on fixed bottom disc to increase the contact area with the ground, and the combined mesa 1 supported by the combined support 2 is stable and reliable. The open space passage is formed between the combined support 2 below the combined mesa 1, to facilitate the ventilation and cooling of the mould.

[0020] The utility model discloses installing the bidirectional exhaust system 3 of multiple exhaust fans in the four around below combined mesa 1, strengthens the cooling capacity of the mould bottom, shortens the solidification time of casting, creates more perfect casting environment for large -scale castings especially large -scale ring -type castings, to provide the guarantee for improving large -scale castings product quality.

[0021] The utility model discloses setting the movable step of the convenient operation personnel's up and down in the side of combined casting platform. It is supposed that the mobile device of convenient movement is installed in the bottom, can avoid the space land of workshop occupation when not using. Or when not using, the platform is placed to the idle place by disassembling, to make other production procedure convenient, save the production space.

[0022] Example 1

[0023] This embodiment adopts large -scale castings combined casting platform to cast a large -scale ring -type castings product. The mould outside diameter of the castings is Φ3500mm, and the inner hole diameter is Φ1500mm, and the height is 1000mm.

[0024] Firstly, four 1200mm*4800mm long rectangular table surfaces 1-1 are used to form a 4800mm*4800mm square combined table surface 1. The combined support 2 is designed to be composed of four support columns 2-2 and one channel steel connecting plate 2-1, the height of the support column 2-2 is 800mm, the channel steel connecting plate 2-1 is welded on the top of the four support columns 2-2, and the support columns 2-2 are cross-connected by the connecting piece 2-3; four sets of combined supports 2 are installed to connect and support the square combined table surface 1. When installing, the square combined table surface 1 and the combined support 2 are connected by using the countersunk head bolts; the exhaust system 3 composed of 16*4 two-way exhaust fans is installed around the square combined table surface 1 to exhaust and cool, and the exhaust direction of the exhaust system 3 can be adjusted during the exhaust and cooling. In this embodiment, a movable step is placed beside the combined casting platform to facilitate the up and down of the operator.

[0025] After the casting of the casting of this embodiment is completed, the exhaust system 3 is opened to exhaust; one exhaust fan is set to send air from outside to inside, and the other three exhaust fans are set to send air from inside to outside, the exhaust direction is adjusted once every 30 minutes, and the cycle is repeated until the temperature displayed by the thermocouple arranged in the mold is ≤500℃, and the observation shows that the temperature drop speed of the thermocouple arranged in the mold is 2h less than that of the traditional method. After the box is opened, the blank size and flatness of the casting are better than those of the casting products of the traditional method. The weight of each blank casting is 160kg lighter than that of the blank cast by the traditional method, the spheroidization rate is improved from 3 to 2, and the internal organization quality of the ultrasonic flaw detection meets the standard requirements.

[0026] It has been proved in practice that the combined casting platform for large castings of the utility model adopts the vertical combined table surface and the two-way exhaust system, provides a more accurate casting environment for the casting of large castings, can reduce the casting allowance of the castings during casting, saves the material cost and reduces the production cost. Due to the timely cooling, the solidification time of the castings is shortened, the internal organization quality of the large castings is greatly improved, and the overall quality of the large castings is improved.

[0027] The above is only the preferred embodiment of the utility model, and various modifications and changes can be made by those skilled in the art without departing from the design concept of the utility model, and these changes and modifications should also be regarded as the protection range of the utility model.

Claims

1. A modular casting platform for large castings, characterized by, It is composed of a combined table, a combined support and an exhaust system; the combined table is installed below the combined support and the exhaust system; The combined table is composed of several rectangular tables, the rectangular tables are provided with a plurality of ventilation holes, the back of the rectangular table is provided with a convex reinforcing strip around, and a plurality of transverse reinforcing ribs are connected between the convex reinforcing strips along the length direction of the rectangular table; The combined support is composed of a plurality of connecting plates, a plurality of support columns and a plurality of connecting pieces; the connecting plates connecting the rectangular tables are installed above a plurality of support columns, and the support columns are cross-connected by a plurality of connecting pieces below; The exhaust system is composed of a plurality of exhaust fans arranged around the combined table below to form a bidirectional exhaust system.

2. The casting platform of claim 1, wherein, A boss is arranged at the connection between the convex reinforcing strip and the plurality of transverse reinforcing ribs, and a plurality of mounting through holes are processed on the boss; The connecting plate is a channel steel, and a plurality of mounting holes corresponding to the positions of the mounting through holes are processed on the channel steel to connect adjacent rectangular tables through fasteners.

3. The casting platform of claim 1, wherein, A plurality of inverted triangular support plates parallel to the end face of the support column are welded above the support column, and the support column and a plurality of inverted triangular support plates are welded below the connecting plate; a joint end cross-connecting the connecting piece is welded at the middle and below the support column, and corresponding mounting holes connecting the connecting piece are processed on the joint end; a bottom disc is welded at the bottom of the support column.

4. The casting platform of claim 3, wherein, Corresponding mounting holes connecting the joint end are processed at both ends of the connecting piece.

5. The casting platform of claim 2, wherein, The mounting through hole on the front end face of the rectangular table is a counterbore.

6. The casting platform of claim 2, wherein, The fastener is a countersunk bolt or a countersunk riveting part.

7. The casting platform of claim 1, wherein, A plurality of the ventilation holes are tapered holes, and the small holes are on the front end face of the rectangular table, and the large holes are on the back of the rectangular table.

8. The casting platform of claim 1, wherein, A movable step facilitating the up and down movement of the operator is arranged beside the combined casting platform.

9. The casting platform of claim 8, wherein, A mobile device facilitating movement is installed at the bottom of the combined casting platform.

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