CN201161283Y - Ring resistance heating furnace installed on a near-isothermal forging press - Google Patents

Abstract

The utility model discloses an annular resistance heating furnace installed on a near-isothermal forging press. The furnace wall (1, 9) of the furnace is installed on the anvil (32, 17) of the press. The inner wall of the furnace wall (1, 9) and the furnace top wall (18), the furnace bottom wall (22) and the forging die (19, 21) form an annular furnace chamber (34) of the furnace. The furnace wall (1, 9) is composed of at least two layers of furnace walls, namely, an inner wall (5, 13) and an outer wall (3, 11) made of aluminum silicate vacuum shaped fiber block refractory material. Resistance heating elements (8) are evenly distributed on the inner ring wall of the furnace wall (1, 9). A heat insulation board (29, 14) and a water cooling board (30, 15) are installed between the furnace wall (1, 9) and the anvil (32, 17) of the press. Matching furnace wall sealing knives (27), sealing knife grooves (28), furnace wall sealing knives (25), and furnace wall enclosures (26) are respectively arranged on the matching surfaces of the furnace walls (1, 9) and the periphery of the furnace shells (2, 10). The furnace is mainly used for heating a near-isothermal forging die.

Description

Ring resistance heating furnace installed on a near-isothermal forging press

technical field

The utility model relates to a heating furnace, in particular to an annular resistance heating furnace installed on a nearly isothermal forging press.

Background technique

When performing near-isothermal forging on disk or ring-shaped forgings such as turbine disks and compressor disks of aero-engines, it is necessary to heat the forging die to a temperature close to the forging temperature of the forging blank, and then perform near-isothermal forging.

Before the appearance of the utility model, the heating of the nearly isothermal forging die mainly used heaters around the die or baked the die to heat the die to the required temperature before forging, and the die was exposed. With this heating method, the time required for mold heating is longer, the heat dissipation of the mold is faster, the temperature uniformity of the mold after heating is poor, and it is very inconvenient to remove the heater or bake the mold, which not only wastes energy but also takes time. It is laborious, and it is not conducive to improving productivity and obtaining high-quality forgings, especially for large and medium-sized near-isothermal forging dies with a die diameter of more than Φ1000mm, a weight of more than 5000kg, and a die heating temperature of more than 1000°C. Not advisable.

In terms of the furnace structure of the ring-shaped resistance heating furnace, the Chinese utility model patent specification CN2493333Y (application number: 01246121.0) published on May 29, 2002 discloses a ring-shaped resistance heating furnace. An annular cavity surrounded by the furnace wall, the inner ring furnace wall, the annular furnace top and the annular furnace bottom, and the furnace chamber is equipped with resistance heating materials. When the furnace is working, the workpiece must be put into the furnace chamber to be heated and then taken out, that is, the workpiece must be separated from the furnace body after the furnace heats the workpiece. Therefore, this furnace structure is not suitable for heating the near-isothermal forging die.

In view of this, the utility model provides an annular resistance heating furnace installed on a nearly isothermal forging press.

Utility model content

The technical problem to be solved by the utility model is to provide a ring-shaped resistance heating furnace installed on a near-isothermal forging press that can directly heat the forging die fixed on the press. The heating furnace has a good heat preservation effect and uniform furnace temperature. Meet the heating requirements of near-isothermal forging dies.

In order to solve the above technical problems, the utility model is installed on the near-isothermal forging press ring-shaped resistance heating furnace, including the upper furnace wall, the lower furnace wall, the roof wall, the bottom wall of the furnace and resistance heating elements, and the resistance heating elements are evenly distributed in the The inner ring wall of the furnace wall. The upper furnace wall of the furnace is fixedly installed on the bottom surface of the upper anvil of the press, and the lower furnace wall is fixedly installed on the lower anvil of the press; the furnace wall is at least composed of two layers of furnace walls, the inner furnace wall and the outer furnace wall. The inner wall of the wall, the roof wall, the bottom wall of the furnace and the annular cavity surrounded by the forging die installed on the press are the hearth of the heating furnace.

As a preferred structure of the furnace wall of the heating furnace described in the present invention, the furnace wall is formed by masonry and knotting of the furnace outer wall and the furnace inner wall made of aluminum silicate vacuum special-shaped fiber block refractory materials; when the furnace outer wall When building and knotting along the transverse fiber direction of the fiber block, the matching furnace inner wall is built and knotting along the vertical fiber direction of the fiber block; when the furnace outer wall is built along the vertical fiber direction of the fiber block If it is built and knotted, the matching furnace inner wall is built and knotted along the transverse fiber direction of the fiber block.

As another preferred structure of the heating furnace wall of the utility model, the furnace wall is formed by masonry and knotting of the furnace outer wall, furnace middle wall and furnace inner wall made of aluminum silicate vacuum special-shaped fiber block refractory materials Wherein, the outer wall of the furnace and the inner wall of the furnace are built and knotted along the transverse fiber direction of the fiber block, and the inner wall of the furnace is built and knotted along the vertical fiber direction of the fiber block.

In order to prevent the heat of the furnace from being transmitted to the press during heating, the furnace is equipped with a furnace top heat insulation board and a furnace top water cooling board between the upper furnace wall, the upper forging die and the upper anvil of the press; Between the forging die and the lower anvil of the press, a furnace bottom heat insulation board and a furnace bottom water cooling board are installed.

In order to reduce the loss of heat in the furnace from the matching surface between the upper furnace and the lower furnace when the furnace is heated, the bottom surface of the upper furnace wall and the top surface of the lower furnace wall of the furnace are provided with furnaces distributed along the circumferential direction of the two planes and matched. Wall sealing knife and sealing knife groove; at the same time, on the furnace shell of the furnace wall and at the mating surface between the upper and lower furnace walls, there are matching furnace wall sealing knives and furnace wall enclosures distributed along the circumference of the furnace shell. .

Compared with the prior art, the beneficial effects of the utility model are as follows:

The annular resistance heating furnace installed on the nearly isothermal forging press described in the utility model installs the electric furnace on the press to directly heat the forging die for near isothermal forging, which changes the use of heaters or baking to heat the mold or to heat the mold. Moving to the furnace for heating and other heating methods makes the heating of the mold more convenient and saves time and effort; the furnace wall of the furnace is made of aluminum silicate vacuum shaped fiber block refractory material with at least two layers of furnace walls for the inner wall and outer wall respectively It is knotted horizontally and vertically along the fiber direction of the fiber block, and the furnace is equipped with a furnace wall sealing knife and a furnace wall sealing knife to reduce the heat loss in the furnace, so that the heat preservation effect of the furnace is better. The furnace temperature is relatively uniform, and it is easy to heat the forging die to the required temperature and keep the forging die warm so as to achieve the heating process parameters required for near-isothermal forging. In addition, this furnace has incomparable advantages for heating large and medium-sized near-isothermal forging dies with a diameter of more than Φ1000mm, a weight of more than 5000kg, and a mold heating temperature of more than 1000°C.

Description of drawings

The utility model is described in further detail below in conjunction with accompanying drawing and specific embodiment.

Fig. 1 is the structural diagram of the annular resistance heating furnace installed on the nearly isothermal forging press described in the utility model.

Fig. 2 is a kind of structural diagram when the upper and lower furnace walls of the heating furnace shown in Fig. 1 are two layers.

Fig. 3 is another structural diagram when the upper and lower furnace walls of the heating furnace shown in Fig. 1 are two layers.

Detailed ways

Fig. 1 has shown a kind of preferred structure that is used for implementing the utility model to be installed on the annular resistance heating furnace on near isothermal forging press, and this heating furnace mainly is by lower furnace wall 1, upper furnace wall 9, resistance heating element 8, furnace Top heat insulation board 14, furnace top water cooling board 15, furnace roof wall 18, furnace bottom wall 22, furnace wall sealing knife 25, furnace wall enclosure 26, furnace wall sealing knife 27, furnace bottom heat insulation board 29, furnace bottom water cooling plate 30 compositions.

The lower furnace wall 1 is in the shape of a ring and is composed of the lower furnace wall shell 2, the lower furnace outer wall 3, the lower furnace middle wall 4, the lower furnace inner wall 5 and the lower furnace wall top plate 6. Among them, the outer wall 3 of the lower furnace, the middle wall 4 of the lower furnace and the inner wall 5 of the lower furnace are built with aluminum silicate vacuum special-shaped fiber block refractory materials and tied together, and the lower furnace wall shell 2 made of metal materials and ordinary refractory materials are used. The lower furnace wall top plate 6 that is made seals its outer ring surface and top surface; The lower furnace middle wall 4 is vertically built and knotted along the fiber direction of the fiber block; on the outer ring surface of the lower furnace wall 1, a metal furnace wall enclosure 26 with an upward opening is installed along its circumference. Evenly distributed resistance heating elements 8 are installed on the inner ring surface of the furnace; an annular sealing knife groove 28 is provided along the inner side of the lower furnace wall shell 2 on the top surface of the lower furnace wall 1 .

Bottom heat insulation board 29 is a circular plate shape, made of asbestos board or mica sheet; furnace bottom water cooling plate 30 is a circular plate shape, made of metal material, and furnace bottom cooling water channels 31 are distributed in the plate The lower furnace wall 1, the furnace bottom insulation board 29 and the furnace bottom water cooling plate 30 are fixedly mounted on the lower anvil 32 of the press by means of bolts or welding. On the lower anvil 32 of the press, a cylindrical lower forging die 21 is fixed across the furnace bottom water-cooled plate 30 and the furnace bottom heat insulation plate 29. The lower forging die 21 is located in the lower furnace wall 1 and has a Same centerline 33. Between the outer circular surface of the lower forging die 21 and the inner ring surface of the lower furnace wall 1 and on the furnace bottom insulation board 29, a furnace bottom wall 22 is built and knotted transversely along the fiber direction with aluminum silicate vacuum special-shaped fiber blocks. .

Upper furnace wall 9 is a ring shape, is made up of upper furnace wall shell 10, upper furnace outer wall 11, upper furnace middle wall 12, upper furnace inner wall 13 and upper furnace wall base plate 7. Among them, the outer wall 11 of the upper furnace, the middle wall 12 of the upper furnace and the inner wall 13 of the upper furnace are made of aluminum silicate vacuum special-shaped fiber block refractory materials and are knotted together, and the upper furnace wall shell 10 made of metal materials and ordinary refractory materials are used. The finished upper furnace wall bottom plate 7 seals its outer ring surface and bottom surface; The furnace wall 12 is vertically built and knotted along the fiber direction of the fiber block; on the outer ring surface of the upper furnace wall 9, a metal furnace wall sealing knife 25 with an opening facing downward is installed along its circumference. Evenly distributed resistance heating elements 8 are installed on the inner ring surface of the wall; an annular furnace wall sealing knife 27 is provided on the bottom surface of the upper furnace wall along its circumference.

The furnace top heat insulation board 14 is in the shape of a circular plate and is made of asbestos board or mica sheet; the furnace top water cooling plate 15 is in the shape of a circular plate and is made of metal materials, and the furnace top cooling water channel 16 is distributed in the plate Upper furnace wall 9, furnace top insulation board 14 and furnace top water-cooled plate 15 are fixedly mounted on the bottom surface of the upper anvil 17 of the press by means of bolts or welding. On the bottom surface of the upper anvil 17 of the press, a cylindrical upper forging die 19 is fixed through the furnace roof water cooling plate 15 and the furnace roof insulation plate 14. The upper forging die 19 is located in the upper furnace wall 9 and has the same shape as the upper furnace wall 9. 33 of the centerline. Between the outer circular surface of the upper forging die 19 and the inner ring surface of the upper furnace wall 1 and under the furnace roof insulation board 14, a furnace roof wall is built and knotted transversely along the fiber direction with aluminum silicate vacuum special-shaped fiber blocks. 18.

When the upper furnace wall 9 and the lower furnace wall 1 are combined, the upper forging die 19 and the lower forging die 21 in the furnace are in a mold-closed state, and both the furnace wall and the forging die have the same centerline 33, and the upper furnace wall 9 The upper furnace inner wall 13, the upper furnace middle wall 12, the upper furnace outer wall 11 and the upper furnace wall shell 10 are respectively connected with the lower furnace inner wall 5, the lower furnace middle wall 4 and the lower furnace outer wall 3 of the lower furnace wall 1. Correspondingly and jointly constitute the furnace wall of the heating furnace described in the utility model, the resistance heating elements 8 are evenly distributed on the furnace wall inner wall of the heating furnace, and the furnace wall inner wall of the heating furnace is connected with the furnace top wall (18), the furnace bottom wall ( 22), the ring-shaped cavity surrounded by the upper forging die 19 and the lower forging die 21 that are molded together constitutes the hearth 34 of the heating furnace; the furnace wall sealing knife 25 fits in the furnace wall enclosure 26, and the furnace wall The sealing knife 27 fits in the sealing knife groove 28 . In addition, in order to facilitate loading and unloading of forgings in the furnace or to observe the forging conditions of forgings in the furnace, a suitable furnace door 21 can also be arranged on the furnace wall of the heating furnace.

The temperature-measuring thermocouple 23 and the temperature-controlling thermocouple 24 are sealed and pass through the upper furnace wall 9 and enter into the furnace for detecting and controlling the temperature in the furnace so as to measure and calculate the temperature of the forging mold in the furnace. The temperature-measuring thermocouple 23 and the temperature-controlling The thermocouple 24 can be one, two or more according to the needs of detection, temperature control and uniformity of the furnace temperature in the furnace, and can also be installed in the lower furnace wall 1 or installed in the upper furnace wall 9 and the lower furnace wall 1 respectively. In, all do not affect the enforcement of the present utility model. Similarly, the furnace wall sealing knife 25 is installed on the lower furnace wall 1 and correspondingly the furnace wall enclosure 26 is installed on the upper furnace wall 9, and the furnace wall sealing knife 27 is installed on the top surface of the lower furnace wall 1 and correspondingly opens the sealing knife groove 28 The bottom surface of upper furnace wall 9 can be used to implement the utility model equally.

Figure 2 and Figure 3 show two preferred structures of the furnace wall of the heating furnace of the present invention, that is, the upper furnace wall 9 and the lower furnace wall 1 . The furnace wall of the heating furnace is mainly composed of inner and outer layers of furnace walls, that is, the upper furnace wall 9 is mainly composed of the upper furnace inner wall 13 and the upper furnace outer wall 11; the lower furnace wall 1 is mainly composed of the lower furnace inner wall 5 and the lower furnace wall. Furnace outer wall 3 forms; The inner wall of this heating furnace (upper furnace inner wall 13 and lower furnace inner wall 5) can be knotted vertically by the fiber direction of the aluminum silicate vacuum profiled fiber block shown in Figure 2, also The fiber direction horizontal masonry of described fiber block shown in Figure 3 can be knotted by laying bricks or stones; The fiber direction of the special-shaped fiber block is horizontally built and knotted, and the fiber direction of the fiber block shown in Figure 3 is also vertically built and knotted, so that the furnace wall formed by building and knotting can be used to implement the present invention equally. The heating furnace described in the utility model.

When the annular resistance heating furnace installed on the nearly isothermal forging press described in the utility model is used to heat the forging die, the upper anvil 17 of the press is displaced to the state shown in Fig. 1 against the direction of the lower anvil 32, and the upper furnace wall 9 is combined with the lower furnace wall 1, the upper forging die 19 and the lower forging die 21 are molded together, the furnace wall sealing knife 25 cooperates with the furnace wall enclosure 26, and the furnace wall sealing knife 27 cooperates with the sealing knife groove 28 to give the heating furnace After energizing and passing water, the upper forging die 19 and the lower forging die 21 can be heated.

Claims (5)

1. A ring-shaped resistance heating furnace installed on a nearly isothermal forging press, comprising an upper furnace wall (9), a lower furnace wall (1), a furnace roof wall (18), a furnace bottom wall (22) and a resistance heating element ( 8), the resistance heating elements (8) are evenly distributed on the inner wall of the furnace wall (1, 9), and it is characterized in that: the upper furnace wall (9) is fixedly installed on the bottom surface of the upper anvil (17) of the press, so that The lower furnace wall (1) is fixedly mounted on the lower anvil (32) of the press; The furnace wall is composed of the inner wall of the furnace wall (1, 9), the furnace roof wall (18), the furnace bottom wall (22), and the forging die (19, 21) installed on the press. The hearth (34) of the heating furnace. 2. The ring-shaped resistance heating furnace installed on a near-isothermal forging press according to claim 1, characterized in that: the furnace wall (1, 9) is an outer wall of the furnace composed of aluminum silicate vacuum special-shaped fiber block refractory material (3,11) and the furnace inner wall (5,13) are built and knotted; the furnace outer wall (3,11) is built and knotted along the transverse fiber direction of the fiber block, and the furnace inner wall (5, 13) is built and knotted. 13) Masonry and knotting along the vertical fiber direction of the fiber block; or, the furnace outer wall (3, 11) is masonry and knotting along the vertical fiber direction of the fiber block, and the furnace inner wall (5, 13) Masonry knots are built along the transverse fiber direction of the fiber block. 3. The annular resistance heating furnace installed on a near-isothermal forging press according to claim 1, characterized in that: the furnace wall (1, 9) is an outer wall of the furnace composed of aluminum silicate vacuum special-shaped fiber block refractory material (3,11), the furnace wall (4,12) and the furnace inner wall (5,13) are built and knotted; the furnace outer wall (3,11) and the furnace inner wall (5,13) are formed along the The horizontal fiber direction of the fiber block is masonry and knotted, and the walls (4, 12) in the furnace are masonry and knotted along the vertical fiber direction of the fiber block. 4. The ring-shaped resistance heating furnace installed on a nearly isothermal forging press according to claim 1, characterized in that: the upper furnace wall (9), the upper forging die (19) and the upper anvil (17) of the press ) between the roof insulation board (14) and the roof water cooling plate (15); between the lower furnace wall (1), the lower forging die (21) and the lower anvil (32) of the press Bottom insulation plate (29) and bottom water cooling plate (30) are arranged. 5. The annular resistance heating furnace installed on a near-isothermal forging press according to claim 1 or 4, characterized in that: there are The furnace wall sealing knife (27) and sealing knife groove (28) distributed along the circumferential direction of the two planes; ), the mating surface of the lower furnace wall (1) is equipped with a furnace wall sealing knife (25) and a furnace wall enclosure (26) distributed along the circumferential direction of the furnace shell (2,10) and supporting.

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