Casting sand mold of high-speed rail three-type vehicle brake pad

Abstract

The utility model discloses a casting sand mould of a brake pad of a high-speed rail three-type vehicle, which comprises a sand mould sheet, a sinking groove type cavity is arranged on the front surface of the sand mould sheet, one side of the sand mould sheet is connected with the bottom of a lug seat, the top of the lug seat is connected with a pouring seat, a pouring hole in the pouring seat is communicated with an air cavity in the lug seat, the air cavity is communicated to the cavity through an ingate, and a movable component and a connecting column are arranged in the cavity. The connecting columns are positioned and connected with the connecting holes in the back surfaces of the adjacent sand mold sheets to fit and seal the mold cavities; according to the sand mold, pouring is conducted in a combined and stacked mode, the production efficiency is improved, meanwhile, the occupied space of equipment is reduced, the movable assemblies in the sand mold sheets can adjust the cavity structure according to the target shape of the brake pad, one-time forming in the casting process is achieved, the machining amount and casting defects are reduced, and the production cost is reduced. A channel formed by overlapping the pouring holes and the air cavity is beneficial to exhausting and deslagging of the cavity, shrinkage of a casting is not hindered, the cavity can be rapidly filled with molten steel, and the problems of cold shut, sand inclusion and the like are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of high-speed rail brake pad production equipment, in particular to a casting sand mold for a high-speed rail type III vehicle brake pad. Background Art

[0002] At present, my country is the country with the most high-speed railway mileage in the world, with an operating mileage of over 42,000 kilometers, accounting for 26.7% of the railway operating mileage, which will further expand the market demand for high-speed rail brake pads. High-speed rail brake pads are short-cycle consumables. A train needs to replace brake pads about 4 times a year, and each train needs about 24 pads. Based on this calculation, China's annual demand for high-speed rail brake pads will reach 3.68 million pieces, of which 3.5086 million pieces will be replaced, accounting for 95.3% of the total demand. With the development of the international market, the demand for brake pads will further increase in the future. In order to meet the growing demand for brake pads, a new type of casting sand mold is needed to improve the production efficiency of brake pads and reduce various defects in the casting process. Utility Model Content

[0003] In order to solve the above problems, the utility model proposes a casting sand mold for the brake pad of the high-speed rail type 3 vehicle, including a sand mold sheet, a sink-type cavity is opened on the front of the sand mold sheet, one side of the sand mold sheet is connected to the bottom of the ear seat, the top of the ear seat is connected to the pouring seat, the pouring hole in the pouring seat is connected to the air cavity in the ear seat, the air cavity is connected to the mold cavity through the inner runner, and a movable component and a connecting column are arranged in the mold cavity. The connecting column is positioned to connect the connecting holes on the back of adjacent sand mold sheets to make the mold cavity fit and close.

[0004] Furthermore, the movable component includes an installation groove, which is opened on both sides of the bottom surface of the cavity. A strip groove is opened on one side of the bottom surface of the installation groove. The insert block cooperates with the strip groove through the insert strip on one side of the bottom surface, so that the insert block is inserted into the installation groove to form a process cavity connected to the cavity.

[0005] Furthermore, the sand mold sheet, ear seat and pouring seat have the same thickness and are coplanar, the air cavity and the inner runner are sinks on the same side of the cavity, a through hole is provided in the center of the air cavity, and the through hole is connected to the pouring hole through the tube cavity.

[0006] Furthermore, the number of combinations of positioning and connecting the sand mold pieces is ten, and the pouring hole in at least one sand mold piece is connected to the air cavity.

[0007] Furthermore, positioning pins are arranged on the outside of the sand mold sheet, and a plurality of process columns are arranged in the middle of the mold cavity.

[0008] The beneficial effects of the utility model are as follows: the utility model performs casting by a combined superposition method, which improves production efficiency while reducing the space occupied by the equipment. The movable components in the sand mold can adjust the cavity structure according to the target shape of the brake pad, so that the casting process can be formed in one step, reducing the processing amount and casting defects. The channel formed by the superposition of each pouring hole and the air cavity is conducive to the exhaust and slag removal of the cavity, will not hinder the shrinkage of the casting, is conducive to the rapid filling of the cavity with molten steel, and reduces the occurrence of problems such as cold shut and sand inclusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a front view structural schematic diagram of the utility model;

[0010] Figure 2 It is a rear view structural schematic diagram of the utility model;

[0011] Figure 3 It is a schematic diagram of the top view structure of the utility model;

[0012] Figure 4 This is a schematic diagram of the structure of the upper side plug block in the utility model;

[0013] Figure 5 It is a structural schematic diagram of the lower side plug block in the utility model.

[0014] The reference numerals are as follows: 1. sand mold; 101. mold cavity; 102. connecting hole; 103. mounting groove; 104. strip groove; 2. ear seat; 201. air cavity; 202. inner runner; 203. through hole; 3. pouring seat; 301. pouring hole; 302. tube cavity; 4. plug block; 401. insert strip; 5. positioning pin; 6. process column; 7. connecting column. DETAILED DESCRIPTION

[0015] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0016] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0017] The utility model is further described below in conjunction with the accompanying drawings:

[0018] like Figures 1 to 5 As shown, a casting sand mold for a high-speed rail type 3 vehicle brake pad includes a sand mold sheet 1, a positioning pin 5 is provided on the outer side of the sand mold sheet 1, a sink type cavity 101 is opened on the front side of the sand mold sheet 1, one side of the sand mold sheet 1 is connected to the bottom of the ear seat 2, the top of the ear seat 2 is connected to the pouring seat 3, an air cavity 201 is provided in the ear seat 2, the air cavity 201 is connected to the cavity 101 through an inner runner 202, the air cavity 201 and the inner runner 202 are sinks on the same side of the cavity 101, a through hole 203 is opened in the center of the air cavity 201, and a pouring hole 301 is opened in the center of the pouring seat 3, the sand mold sheet 1, the ear seat 2 and the pouring seat 3 have the same thickness and are coplanar, and each sand mold sheet 1 can be combined and stacked, and the number of combinations is ten. After stacking, each pouring hole 301 is connected in series to form a straight runner, and each through hole 203 is connected in series to form an air channel. At least one pouring hole 301 of the sand mold piece 1 is connected to the air cavity 201 through the tube cavity 302, so that the molten steel in the straight runner can flow into the air channel and finally flow into the mold cavity 101 through the inner runner 202.

[0019] In this embodiment, two connecting columns 7 are symmetrically arranged in the cavity 101. The connecting columns 7 are positioned to connect the connecting holes 102 on the back of adjacent sand mold sheets 1 so that the cavity 101 is fitted and closed. A process column 6 and a movable component for changing the weight and shape of the casting are also arranged in the cavity 101. The process column 6 is arranged in the middle of the cavity 101, and the mounting groove 103 of the movable component is opened on both sides of the bottom surface of the cavity 101. A strip groove 104 is opened on one side of the bottom surface of the mounting groove 103. The insert block 4 cooperates with the strip groove 104 through the insert strip 401 on one side of the bottom surface, so that the insert block 4 is inserted into the mounting groove 103 to form a process cavity connected to the cavity 101. The process cavity can enable the sand mold to cast the necessary features of the brake pad casting at one time, reducing the processing amount and casting defects.

[0020] The working principle of the utility model is as follows:

[0021] Apply glue to the installation groove 103 of each sand mold piece 1, insert the corresponding plug block 4 into it and fix it. Through the cooperation of the connecting column 7 and the connecting hole 102, ten sand mold pieces 1 are stacked and combined into an integral sand mold. The sand mold is reinforced with a 500x500mm sand box. The gap between the sand mold and the box body is filled with water glass sand until it reaches the plane of the uppermost sand mold piece 1 of the sand mold. At this time, each pouring hole 301 is connected in series to form a sprue, and each through hole 203 is connected in series to form an airway. The pouring port of the sprue and the exhaust port of the airway are the pouring holes 301 and through holes 203 of the uppermost sand mold piece 1 respectively. Put a filter screen on the pouring port, and put the box mud 10mm around it, and then align the lower outlet of the pouring cup with the pouring port (see Figure 3 , the pouring cup is funnel-shaped, and its upper diameter is more than twice the diameter of the sprue), and then the entire sand mold is covered with water glass sand for 80-100mm, and then carbon dioxide is used to absorb it. After all preparations are completed, the molten steel can be poured into the sand mold through the pouring cup. The molten steel flows into the airway from the sprue and flows into the mold cavity 101 through the ingode 202. The gas in the mold cavity 101 is pushed out from the ingode 202 on the other side to the airway and discharged. After pouring and solidification, the brake pad castings that have come out of each sand mold piece 1 will be connected to the two steel bars formed in the sprue and the airway into a whole, and need to be removed by oxygen cutting.

[0022] The utility model performs casting by a combined superposition method, which improves production efficiency and reduces the space occupied by the equipment. The movable components in the sand mold 1 can adjust the structure of the cavity 101 according to the target shape of the brake pad, so that the casting process is formed in one step, reducing the processing amount and casting defects. The channel formed by the superposition of each pouring hole 301 and the through hole 203 is conducive to the exhaust and slag discharge of the cavity 101, will not hinder the shrinkage of the casting, is conducive to the rapid filling of the cavity with molten steel, and reduces the occurrence of problems such as cold shut and sand inclusion.

[0023] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A casting sand mold for a high-speed rail type III brake pad, comprising a sand mold piece (1), characterized in that: The front side of the sand mold sheet (1) is provided with a trough-type cavity (101); one side of the sand mold sheet (1) is connected to the bottom of the ear seat (2); the top of the ear seat (2) is connected to the pouring seat (3); a pouring hole (301) in the pouring seat (3) is connected to an air cavity (201) in the ear seat (2); the air cavity (201) is connected to the cavity (101) through an inner runner (202); a movable component and a connecting column (7) are arranged in the cavity (101); the connecting column (7) is positioned to connect to the connecting hole (102) on the back side of an adjacent sand mold sheet (1) so that the cavity (101) is fitted and closed.

2. The casting sand mold of the high-speed rail type 3 brake pad according to claim 1 is characterized in that: The movable component comprises a mounting groove (103), the mounting groove (103) being provided on both sides of the bottom surface of the mold cavity (101), a strip groove (104) being provided on one side of the bottom surface of the mounting groove (103), and the insert block (4) being matched with the strip groove (104) through an insert strip (401) on one side of the bottom surface, so that the insert block (4) is inserted into the mounting groove (103) to form a process cavity connected to the mold cavity (101).

3. The casting sand mold of the high-speed railway type 3 brake pad according to claim 1 is characterized in that: The sand mold sheet (1), the ear seat (2) and the pouring seat (3) have the same thickness and are coplanar, the air cavity (201) and the inner pouring channel (202) are sinks on the same side as the mold cavity (101), a through hole (203) is provided at the center of the air cavity (201), and the through hole (203) is connected to the pouring hole (301) through a tube cavity (302).

4. The casting sand mold of the high-speed rail type 3 brake pad according to claim 1 is characterized in that: The number of combinations of positioning and connecting the sand mold sheets (1) is ten, and the pouring hole (301) in at least one sand mold sheet (1) is connected to the air cavity (201).

5. The casting sand mold of the high-speed railway type 3 brake pad according to claim 1, characterized in that: The outer side of the sand mold sheet (1) is provided with a positioning pin (5), and the middle part of the mold cavity (101) is provided with a plurality of process columns (6).

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