CN106239810A - A kind of controllable temperature online hot-pressing forming system of organic composite friction material - Google Patents

Abstract

The invention discloses a temperature-controllable online hot-press forming system for organic composite friction materials. The composite material preparation system mainly includes two parts, one part is a bidirectional extrusion system, and the other part is an online heating and heat preservation system. The main devices of the system are as follows: two-way extrusion shaft, extrusion cylinder, extrusion die base, thermocouple, heating coil, heat preservation refractory material, and temperature control device. The device of the present invention is mainly used for the preparation of organic composite friction materials. During the preparation, the material utilization rate is high, the billet deformation is uniform, the extrusion force is small, the density is high, the product size accuracy and surface accuracy are high, and the temperature is easy to measure during the online hot pressing process. , good heat preservation effect, precise temperature control. The mold designed by the invention has a simple structure, can produce products of various specifications through simple mold change, and has the advantages of convenient use, low cost, long service life and the like.

Description

A temperature-controllable online hot-press forming system for organic composite friction materials

technical field

The invention relates to a hot extrusion molding technology for organic composite friction materials, in particular to a hot extrusion molding device for organic composite friction materials, which is used in the field of hot pressing processing for organic composite friction materials.

Background technique

Organic composite friction materials have a series of advantages such as high specific strength, easy control of molding process, low cost, environmental protection and safety, and stable performance. They are a new type of friction material widely promoted at present. It has important application value and broad application prospects in the fields of mechanical equipment, automobiles and trains. However, in the prior art, the organic composite friction material has the problems that heating and pressing are difficult to integrate, and the heating process is difficult to control on-line. Simultaneously, there are also the problems of uneven and labor-saving pressing.

Contents of the invention

The invention provides a temperature-controllable online hot-press forming system and device for organic composite friction materials to solve the problems that heating and pressing are difficult to integrate and the heating process is difficult to control online. Control the pressing temperature during pressing. At the same time, through bidirectional pressing, the problem of uneven and labor-intensive one-way pressing of powder is improved.

The technical solution of the present invention: a hot press molding system for organic composite friction materials, including a two-way hot press forming mold and a heating device, wherein the two-way hot press forming mold includes an inner cylinder mold, a mold base, an upper punch male mold, a lower punch The male mold, the inner cylindrical mold is set on the upper part of the mold base, the upper punch male mold and the lower punch male mold are respectively set on the inner cylinder mold and the inner circle of the mold base, and the outer layer of the inner cylinder mold is equipped with a heating device. Contains heating system, heat preservation system, metal casing and temperature control instrument.

A temperature measuring hole is processed on the upper side of the inner cylinder mold, and the temperature measuring hole communicates with the thermocouple placement groove, and the thermocouple is placed in the thermocouple placement groove and connected with a temperature control instrument.

The inner diameter of the inner cylinder die matches the outer diameter of the upper punch male die, the inner diameter of the die base is larger than the outer diameter of the lower punch male die, the outer diameter of the upper punch die is the same as that of the lower punch male die, and the length of the lower punch male die is greater than the height of the die base , the mold base consists of two semicircles.

The heating system is a heating coil, and the heat preservation system is a glass fiber layer and an asbestos layer.

The inner wall of the inner cylinder die, the upper punch male die, the lower punch male die, and the outer wall of the die base are coated with thermal insulation paint.

The outer layer of the inner cylinder mold is provided with a heating coil, a glass fiber layer, an asbestos layer and a metal shell in sequence.

When working, the thermocouple and the heater are connected with the temperature control instrument, and the measurement of the mold temperature and the control of the heater are controlled by the temperature control instrument.

Compared with prior art, the advantage of the present invention is:

1. The present invention solves the difficulty of simultaneous completion of pressing and synthesis, and can realize temperature control in the online hot pressing process through heating devices, thermocouples and temperature control devices. The temperature control is accurate and the adjustable range is wide.

There are temperature measuring holes on the inner cylinder mold to make temperature measurement accurate and convenient; a circular heater is attached to the inner cylinder mold, and the outside of the heater is insulated with glass fiber and asbestos layers to prevent the temperature of the mold from being affected during the pressing process. The cooling is too fast, and the pressing temperature is difficult to control and other problems. When working, the inner cylinder mold is placed on the mold base, and the upper punch and the lower punch are respectively set in the inner circle of the inner cylinder mold and the mold base; the thermocouple and the heater are connected with the temperature control instrument, and the mold temperature is measured during operation. The control with the heater is controlled by the temperature control instrument.

2. The pressing mold is a two-way pressing process, so that the powder material is evenly stressed during the pressing process, the material utilization rate is high during preparation, the billet deformation is uniform, the extrusion force is small, the density is high, the product size accuracy and surface accuracy are high, and online hot pressing The temperature in the process is easy to measure, the heat preservation effect is good, and the temperature control is accurate. Reduce the pressing force required by the equipment. The mold has simple structure, convenient use, low cost and long service life.

Description of drawings

Accompanying drawing 1 is a schematic diagram of a temperature-controllable online hot-press forming system and device for an organic composite friction material;

In the figure: 1-upper punch male mold 2-metal shell 3-asbestos layer 4-glass fiber 5-heating coil 6-inner cylinder mold 7-thermocouple placement slot 8-thermocouple 9-die base 10-lower punch anode Model 11 - temperature control instrument.

detailed description

As shown in Fig. 1, a kind of thermocompression forming system of organic composite friction material comprises two-way thermocompression forming mold and heating device, and wherein bidirectional thermocompression forming mold comprises inner cylinder mold 6, die holder 9, upper punch male mold 1 , the lower punch male die 10, the inner cylinder die 6 is arranged on the die base 9 top, the upper punch male die 1 and the lower punch male die 10 are respectively arranged on the inner circle of the inner cylinder die 6 and the die base 9, and the inner cylinder die The outer layer of 6 is equipped with heating device, and heating device comprises heating system, insulation system, metal shell 2 and temperature control instrument 11. The upper side of the inner cylinder mold 6 is processed with a temperature measuring hole, which communicates with the thermocouple placement groove 7, and the thermocouple 8 is placed in the thermocouple placement groove 7 and connected with the temperature control instrument 11. The inner diameter of the inner cylinder die 6 matches the outer diameter of the upper punch male die 1, the inner diameter of the mold base 9 is greater than the outer diameter of the lower punch male die 10, the upper punch die 1 is the same as the outer diameter of the lower punch male die 10, and the length of the lower punch male die 10 is longer than The height of mold base 9, mold base 9 is made up of two semicircles. The heating system is a heating coil 5, and the heat preservation system is a glass fiber layer 4 and an asbestos layer 3. The inner wall of the inner cylinder mold 6, the upper punch male die 1, the lower punch male die 10, and the outer wall of the mold base 9 are coated with thermal insulation paint. The outer layer of the inner cylinder mold 6 is provided with a heating coil 5, a glass fiber layer 4, an asbestos layer 3 and a metal shell 2 in sequence.

(1) In actual use, use thermal insulation paint to coat the inner mold wall of the inner cylindrical mold 6, and use thermal insulation paint to coat the outer walls of the upper punch male die 1, mold base 9, and lower punch male die 10

(2) Assemble the mold according to the accompanying drawing 1, and place the mold on the workbench of the vertical hydraulic press. Set the pressing temperature to 175°C. When the temperature reaches the preset temperature and the temperature is stable, remove the upper punch male die 1 and put the evenly mixed organic composite material raw material powder into the inner cylindrical die 6, and then place the upper punch For the male mold 10, start the hydraulic press and press down the upper punch male mold with a pressure of 20 MPa. After the temperature returns to 175° C., carry out bidirectional compression molding and hold the pressure for 18 minutes.

(3) Remove the upper punch male die 1 and the lower punch male die 10, take off the pressed sample, and clean the die for later use.

The pressure used in this embodiment is relatively small, only 20 MPa, the temperature is 175° C., and the pressure holding time is 18 minutes to obtain the product. When pressing other composite materials, the pressing pressure, temperature and time can be adjusted according to the situation.

Claims (6)

1. the hot-pressing forming system of an organic composite friction material, it is characterised in that: include Bidirectional hot press mould and add Thermal, wherein Bidirectional hot press mould comprises inner cylinder mould (6), die holder (9), upper punch formpiston (1), undershoot formpiston (10), Inner cylinder mould (6) be arranged at die holder (9) top, upper punch formpiston (1) and undershoot formpiston (10) be respectively arranged at inner cylinder mould (6) and The inner circle of die holder (9), the outer layer of inner cylinder mould (6) is equipped with heater, and heater comprises heating system, heat-insulation system, gold Belong to shell (2) and temperature control instrument (11).

The hot-pressing forming system of a kind of organic composite friction material the most according to claim 1, it is characterised in that: inner cylinder Mould (6) upside is machined with thermometer hole, and thermometer hole connects with thermocouple placing trough (7), and thermocouple (8) is positioned over thermocouple placing trough (7) in and it is connected with temperature control instrument (11).

The hot-pressing forming system of a kind of organic composite friction material the most according to claim 1, it is characterised in that: inner cylinder Mould (6) internal diameter matches with upper punch formpiston (1) external diameter, die holder (9) internal diameter be more than undershoot formpiston (10) external diameter, upper trimming die (1) with Undershoot formpiston (10) external diameter is identical, and undershoot formpiston (10) length is more than the height of die holder (9), and die holder (9) is made up of two semicircles.

The hot-pressing forming system of a kind of organic composite friction material the most according to claim 1, it is characterised in that: heating system System is heating coil (5), and heat-insulation system is glass layer (4) and asbestos layer (3).

The hot-pressing forming system of a kind of organic composite friction material the most according to claim 1, it is characterised in that: inner cylinder Mould (6) inwall, upper punch formpiston (1), undershoot formpiston (10), die holder (9) outer wall coating heat insulating coatings.

The hot-pressing forming system of a kind of organic composite friction material the most according to claim 3, it is characterised in that: inner cylinder Mould (6) outer layer sets gradually heating coil (5), glass layer (4), asbestos layer (3) and metal shell (2).