CN219007159U

CN219007159U - Novel embedded composite brake shoe hot-pressing die

Info

Publication number: CN219007159U
Application number: CN202223503877.1U
Authority: CN
Inventors: 彭昊; 赵艳晶; 郭大朋; 李克钧; 王娇
Original assignee: Shenyang Yuancheng Friction & Sealing Material Co ltd
Current assignee: Shenyang Yuancheng Friction & Sealing Material Co ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-05-12
Anticipated expiration: 2032-12-28

Abstract

The utility model provides a novel embedded composite brake shoe hot-pressing die, which solves the problems that the die manufactured by the existing composite brake shoe hot-pressing die is easy to damage and the quality of brake shoe products is low, and the technical scheme is as follows: comprising the following steps: the device comprises an upper die, a middle die and a lower die, wherein upper die discharging grooves are formed in two sides of an upper die head of the upper die, and lower die discharging grooves are formed in two sides of a lower die head of the lower die; the outer sides of the upper template and the lower template are provided with double-layer heat insulation boards; the inner surface of the middle die is provided with a plurality of lining plates with hardness larger than that of the upper die head and the lower die head; the upper die guide post of the upper die and the upper die guide post of the lower die are in clearance insertion connection with the guide post hole of the middle die. The brake shoe has reasonable structure, low maintenance cost of the die and long service life, and improves the quality of the brake shoe product.

Description

Novel embedded composite brake shoe hot-pressing die

Technical Field

The utility model relates to the technical field of composite brake shoe manufacturing equipment, in particular to a novel embedded composite brake shoe hot-pressing die which is used for hot-pressing manufacturing of a train composite brake shoe.

Background

At present, the technology of high-speed railway locomotives in China is developing at a high speed, and along with the development of railway trains towards high speed and heavy load directions, stricter requirements are also put forward on various performance requirements of locomotives, and brake shoes are important braking components in disc braking devices of railway locomotive braking systems and are generally formed by combining hard metal tile backs and friction bodies. The friction body takes copper as a matrix, and iron powder, graphite and a small amount of other metal elements are added. In the production process of the brake shoe, the prepared granular friction material is poured into a hot-pressing die cavity with a certain temperature, then the tile back is put into the hot-pressing die cavity, a certain pressure is applied to the hot-pressing die through a press, and after the hot-pressing die is stressed, the friction material and the tile back are continuously compressed in the middle die cavity through an upper die head and a lower die head. Meanwhile, the middle die has a heating function, heat source energy is transmitted to the friction material and the tile back which are pressed in the cavity, after the friction material is vulcanized for a certain time and is fused with the tile back into a whole, the pressing machine releases pressure, the upper die is lifted, and the composite brake shoe can be taken after the middle die is moved downwards.

Because the friction material of the composite brake shoe has a larger friction coefficient, in the manufacturing of the composite brake shoe, the friction material and the cavity generate friction at a high temperature state, and the middle mold cavity, the upper mold head and the lower mold head can often have the defects of strain, groove-shaped damage and the like. Meanwhile, the middle mold cavity can deform under high temperature and high pressure for a long time, so that the appearance quality reject ratio of the produced product is improved, and meanwhile, the maintenance cost of the mold is improved, and the service life of the mold is shortened.

Disclosure of Invention

The utility model aims to provide a novel embedded composite brake shoe hot-pressing die, which solves the problems that the die manufactured by the existing composite brake shoe hot-pressing die is easy to damage and the quality of brake shoe products is low.

The technical scheme adopted by the utility model is as follows: this novel mosaic type composite brake shoe hot pressing die includes: the die comprises an upper die with an upper die head and an upper die plate, a frame type middle die with a heating pipe and a lower die with a lower die head and a lower die plate, and is technically characterized in that: upper die discharging grooves are formed in two sides of an upper die head of the upper die, and lower die discharging grooves are formed in two sides of a lower die head of the lower die; the outer sides of the upper template and the lower template are provided with double-layer heat insulation boards; the inner surface of the middle die is provided with a plurality of lining plates with hardness larger than that of the upper die head and the lower die head; the upper die guide post of the upper die and the upper die guide post of the lower die are in clearance insertion connection with the guide post hole of the middle die.

The upper die discharging groove is formed by inwards narrowing the connecting section of the upper die head and the upper die plate.

The lower die discharging groove is formed by inwards narrowing the connecting section of the lower die head and the lower die plate.

The utility model has the advantages and positive effects that: because this novel mosaic composition brake shoe hot pressing mould is provided with upper die row silo and lower mould row silo respectively in upper die head and lower die head both sides for friction material is under the not fashioned mobile state of heating, and unnecessary friction material after filling up die cavity and die head clearance can follow upper die row silo and lower mould row silo and discharge, when reducing the product suppression completion die sinking, the damage that friction material and die cavity take place relative friction action and cause. The double-layer heat insulation board arranged on the upper die plate and the lower die plate can reduce heat loss caused by heat transfer due to the fact that the double-layer heat insulation board is connected with the table top of the press in a fitting mode, saves energy sources and improves hot pressing efficiency. The inner surface of the middle die is provided with a plurality of lining plates with hardness larger than that of the upper die head and the lower die head, so that collision damage caused by hard collision of the lining plates can be avoided, and the service life of the die is prolonged. Therefore, the brake shoe has reasonable structure, low die maintenance cost and long service life, and improves the quality of the brake shoe product.

Drawings

The utility model is further described below with reference to the accompanying drawings.

FIG. 1 is a schematic overall structure of an embodiment of the present utility model;

FIG. 2 is a bottom view of the upper mold of the present utility model;

FIG. 3 is a schematic view of the upper die structure of the upper die of the present utility model;

FIG. 4 is a cross-sectional view taken along A-A of FIG. 3;

FIG. 5 is a schematic diagram of a mold structure according to the present utility model;

FIG. 6 is a top view of the lower mold of the present utility model;

FIG. 7 is a schematic view of the lower die structure of the lower die of the present utility model;

FIG. 8 is a B-B cross-sectional view of FIG. 7;

fig. 9 is a schematic view of the use state structure of the present utility model.

The serial numbers in the figures illustrate: the heat insulation plate comprises a 10 upper die, a 11 double-layer heat insulation plate, a 12 upper die plate, a 13 upper die head, a 14 upper die guide post, a 15 upper die discharge groove, a 20 middle die, a 21 middle die frame, a 22 heating pipe placement hole, a 23 thermocouple installation hole, a 24 guide post jack, a 25 lining plate, a 30 lower die, a 32 lower die plate, a 33 lower die head, a 34 lower die guide post, a 35 lower die discharge groove, a 40 press upper table top, a 41 press lower table top and a 50 composite brake shoe.

Detailed Description

Detailed description of the drawings referring to fig. 1 to 9, an embodiment of the present utility model is shown in fig. 1 and 2, and a novel insert type composite brake shoe hot-pressing mold is composed of an upper mold 10, a frame type middle mold 20 and a lower mold 30.

The upper die 10 mainly comprises an upper die plate 12 and a plurality of upper die heads 13 arranged at the lower part, wherein the upper die heads 13 are respectively connected and fixed with the upper die plate 12 through socket head cap screws, so as to avoid the phenomenon of hard collision between the upper die heads and a middle die cavity, prolong the service life of the die, and the upper die heads are made of 40Cr, and have hardness of HRC 37-42. A double-layer heat insulation board 11 is arranged between the upper die plate 12 and the upper table 40 of the press, and the double-layer heat insulation boards 11 can respectively adopt: the first heat insulating board is synthesized heat insulating board, mineral powder and paper fiber composition, and has heat insulating coefficient of 0.3 and thickness of 40mm. B. And a second heat insulation plate: glass fiber and high temperature resistant resin, the heat insulation coefficient is 0.15, and the thickness is 40mm. Two groups of upper die guide posts 14 are respectively arranged on two sides of the upper die plate 12 and are connected and fixed by adopting transition fit, and the upper die guide posts 14 of the upper die and guide post insertion holes 24 of the middle die form clearance insertion connection. As shown in fig. 3 and 4, upper die discharging grooves 15 are formed on two sides of the upper die head 13, specifically, a discharging groove formed by narrowing the connecting section of the upper die head and the upper die plate inwards can be adopted, and the depth of the discharging groove is 1.5m.

As shown in fig. 1 and 5, the middle die 20 is mainly a frame type middle die formed by a middle die frame 21 with a plurality of cavities, and a plurality of lateral, longitudinal and vertical lining plates 25 are connected to the inner surface of the middle die 20 through socket head cap screws. In order to improve the mechanical properties of the middle die frame and reduce fatigue damage of the middle die frame in a high-temperature and high-pressure state, the middle die frame 21 can be processed in a 40Cr material and integral forging mode. In order to avoid the phenomenon of hard collision between the upper die head 13 and the cavity of the middle die and prolong the service life of the die, the lining plate 25 is made of Cr12, and the hardness of the lining plate is required to be HRC 53-58. The lining plates 25 are in clearance fit with the middle die frame. The middle die frame 21 is transversely provided with a heating pipe placing hole 22, a lining plate screw through hole and a thermocouple placing hole 23. The number of the heating pipe placing holes is fifteen, the periphery of the cavity is uniformly distributed for heating, and the heating pipe placing holes and the thermocouple installing holes are used for arranging heating pipes and thermocouples. Vertical guide post insertion holes 24 are formed in two sides of the middle die frame 21 and are used for inserting the upper die guide posts 14 and the lower die guide posts 34.

As shown in fig. 1 and 6, the lower die 30 mainly comprises a lower die plate 32 and a plurality of lower dies 33 arranged on the upper portion, the lower dies are respectively connected and fixed with the lower die plate through socket head cap screws, in order to avoid the phenomenon of hard collision between the lower dies 33 and a middle die cavity, the service life of the die is prolonged, the lower dies are made of 40Cr, and the hardness of the lower dies is required to be HRC 37-42. To reduce the loss of heat energy from the mold, a double-layer heat insulating plate 11 identical to the upper mold is also placed between the lower die plate 32 and the press lower table 41. Two groups of lower die guide posts 34 are respectively arranged on two sides of the lower die plate 32 and are connected and fixed with the lower die plate in a transition fit manner, and the lower die guide posts 34 of the lower die and the guide post insertion holes 24 of the middle die form clearance insertion connection. As shown in fig. 7 and 8, the two sides of the lower die head 33 are provided with lower die discharge grooves, specifically, a discharge groove formed by narrowing the connecting section of the lower die head and the lower die plate inwards can be adopted, and the depth of the discharge groove is 1.5m.

The working principle and the using method are as follows: as shown in fig. 1 and 9, in the hot press forming process of the composite brake shoe by using the novel embedded composite brake shoe hot press mold, the upper mold 10, the middle mold 20 and the lower mold 30 are simultaneously pressurized to form the composite brake shoe 50, and an upper mold discharge groove and a lower mold discharge groove are respectively arranged at two sides of the upper mold head and the lower mold head, so that redundant friction materials after filling the mold cavity and the mold head gap can be discharged from the upper mold discharge groove and the lower mold discharge groove in a heated and unshaped flowing state, and when the product is pressed and opened, the damage caused by relative friction action between the friction materials and the mold cavity is reduced, and the defects of lining plate or upper and lower mold head strain, ditch-shaped damage and the like are avoided. Because the upper template and the lower template all have the heating function, if directly pass through screw connection with the press, upper template part heat can be lost because of heat conductance, consequently, for reducing the loss of mould heat energy, the double-deck heat insulating board that upper template and lower template set up can reduce and pass through the heat loss because of being connected with the laminating of press mesa, the energy saving has and has improved hot pressing efficiency. The inner surface of the middle die is provided with a plurality of gap spliced lining plates with hardness greater than that of the upper die head and the lower die head, so that collision damage caused by hard collision between the lining plates of the upper die head and the lower die head can be avoided, and the service life of the die is prolonged. Therefore, the brake shoe has reasonable structure, low die maintenance cost and long service life, and improves the quality of the brake shoe product.

In view of the above, the object of the present utility model is achieved.

Claims

1. A novel embedded composite brake shoe hot-pressing die comprises: the die comprises an upper die with an upper die head and an upper die plate, a frame type middle die with a heating pipe and a lower die with a lower die head and a lower die plate, and is characterized in that: upper die discharging grooves are formed in two sides of an upper die head of the upper die, and lower die discharging grooves are formed in two sides of a lower die head of the lower die; the outer sides of the upper template and the lower template are provided with double-layer heat insulation boards; the inner surface of the middle die is provided with a plurality of lining plates with hardness larger than that of the upper die head and the lower die head; the upper die guide post of the upper die and the upper die guide post of the lower die are in clearance insertion connection with the guide post hole of the middle die.

2. The novel embedded composite brake shoe hot-pressing die according to claim 1, wherein: the upper die discharging groove is formed by inwards narrowing the connecting section of the upper die head and the upper die plate.

3. The novel embedded composite brake shoe hot-pressing die according to claim 1, wherein: the lower die discharging groove is formed by inwards narrowing the connecting section of the lower die head and the lower die plate.