CN200998761Y - Tire die forging upper demoulding device - Google Patents

Abstract

A demoulding device for an upper tire die forging belongs to forging machinery, in particular to a demoulding device for hydraulic forging. The device consists of a forging press main cylinder, upper die table, and upper die base that are connected in sequence to form a concentric cylinder. The hydraulic cylinder and the plunger of the demoulding cylinder are connected with the mandrel under the plunger of the demoulding cylinder; It is installed in the annular limit groove provided by the outer mold and the inner mold, corresponding to the ejector rod. When demoulding, the plunger of the demoulding cylinder pushes down the ejector rod and the ejector sleeve, so that the workpiece and the upper mold are completely separated, and the ejector sleeve The workpiece is separated from the upper mold. The advantage is that the device has a good demoulding effect, is fast and reliable, ensures 100% demoulding, and improves the efficiency of forging processing; the device has a simple and reasonable structure and is easy to maintain; lubricant pollution is avoided, mold consumption is reduced, and the yield of finished products is improved.

Description

Tire die forging upper demoulding device

technical field

The utility model belongs to forging machinery, in particular to a hydraulic tire mold forging demoulding device.

Background technique

The upper mold of the large tire die forging is connected under the master cylinder in turn by the upper mold base and the upper mold platform. During the forging process, due to the complex surface shape of the workpiece and the heating of the billet, the friction between the workpiece and the tire mold after forging is large, and the workpiece and the upper mold often adhere to each other and are not easy to separate. Demolding has become a difficult problem affecting production. The current solution to the demoulding problem is to start with reducing the friction between the workpiece and the upper mold as much as possible, and rely on the workpiece's own weight to drop and demould. Some use spraying equipment to spray lubricant on the surface of the mold during the forging process to reduce the friction between the workpiece and the upper mold; some adopt to increase the draft angle of the mold to reduce the vertical friction between the workpiece and the upper mold. Friction to facilitate demoulding. The defect of the former is that spraying lubricant requires both spraying equipment and lubricant, which increases the processing cost, pollutes the environment and increases the cost of pollution control; The amount of cutting for reprocessing is increased, and more importantly, neither of them can ensure 100% demoulding, which reduces the processing efficiency, and also causes workpiece scrapping, mold damage (failure), and affects the smooth progress of production.

Contents of the invention

In order to overcome the deficiencies in the prior art, the purpose of this utility model is to provide a mold forging upper demoulding device, which applies a push force from top to bottom on the workpiece during demoulding, so as to ensure that the workpiece falls off from the upper mold smoothly. , so that the production goes on smoothly, and also avoids the pollution caused by spraying lubricants, or reduces the amount of billet feeding.

A tire die forging upper demoulding device, comprising a main cylinder of a forging press, an upper die table, and an upper die seat connected in sequence to form a concentric cylinder, and is characterized in that the main cylinder, the upper die table, and the center of the die seat core are provided with inner cores of the same diameter. The inner cavity is provided with a demoulding hydraulic cylinder and a demoulding cylinder plunger. The lower end of the demoulding cylinder plunger is connected with the mandrel. Corresponding to ensure the vertical movement of the ejector rod up and down; the ejector sleeve is slidably installed in the preset annular limit groove of the outer mold and the inner mold, corresponding to the ejector rod.

The utility model is further improved, the center of the main cylinder, the upper mold table, and the core of the mold base are provided with slot holes with the same diameter, which are connected to form an inner cavity for setting the demoulding hydraulic cylinder and its plunger, and the demoulding hydraulic cylinder and its plunger are placed in the inner cavity In the main cylinder, the flange of the demoulding cylinder is fixed on the main cylinder; the main cylinder is also equipped with an upper oil hole and a lower oil hole, one end of the oil hole is connected with the demoulding hydraulic cylinder, and the other end is connected with the oil nozzle, the upper oil hole or the lower oil hole After entering the oil, push the plunger of the demoulding cylinder to move up and down.

There is a mold core inside the upper mold base, a groove is set on the mold base, and an inverted assembly boss is set on the side, which matches with the boss inside the upper mold base. The mold base core is placed in the upper mold base, and the upper mold The upper mold base is fixed on the upper mold platform; the core of the mold base is provided with at least one pair of through holes for sliding ejector rods, and copper sleeves are provided at the upper and lower ends of the through holes, and the ejector rods are slidably installed in the through holes and copper sleeves. , falling on the ejector sleeve. A copper sleeve is provided to reduce the wear of the ejector pin and the through hole of the mold base core. An annular limit boss is provided on the ejector rod to limit its downward stroke and facilitate the disassembly and assembly of the demoulding mechanism.

The upper mold is composed of an outer mold and an inner mold. The outer mold is provided with an annular boss for fixing the inner mold. The inner mold is embedded in the outer mold and supported by the outer mold. The outer mold is fixed on the upper mold platform; the outer mold is also equipped with a sliding The annular boss of the ejection sleeve forms an annular limiting groove with the inner mold to limit the ejection sleeve.

The ejector sleeve is an annular body, which slides in the annular limit groove. The annular body is adopted, and the workpiece is evenly stressed when demoulding.

Before the forging process, the plunger of the demoulding cylinder is at the upper end of the cylinder body. When the main cylinder is pressed down, the billet is deformed, and the ejector sleeve will be pushed up to the upper part of the annular limit groove; after the workpiece is pressed and formed, the main cylinder is lifted At the same time, a signal for the downward movement of the plunger of the demoulding cylinder is given, oil is fed into the upper oil hole, the plunger of the demoulding cylinder is pushed down, the mandrel, the ejector rod and the ejector sleeve are pressed down, and pressure is applied to the workpiece until the workpiece Completely separated from the upper mold. Because only the friction between the workpiece and the upper mold is overcome when demolding, the power consumption is small.

Compared with the prior art, the advantage is that the device has a good demoulding effect, is fast and reliable, ensures 100% demoulding, and improves the efficiency of forging processing; the device has a simple and reasonable structure and is easy to maintain; it avoids lubricant pollution, mold The service life is extended, the mold consumption is reduced, the finished product rate is improved, and the processing cost is greatly reduced.

Description of drawings

Below with reference to accompanying drawing, the utility model is further described.

Fig. 1 is a structural schematic diagram of a demoulding device for tire die forging.

Detailed ways

From the embodiment shown in Figure 1, it can be seen that the main cylinder 1 of the forging press is connected with the upper die table 6 and the upper die base 9 in turn to form a concentric cylinder, and the centers of the main cylinder 1, the upper die table 6 and the die base core 8 are arranged concentrically. Inner cavity with the same diameter, a demoulding hydraulic cylinder and a demoulding cylinder plunger 4 are arranged in the inner cavity, the demoulding cylinder plunger 4 is connected with the mandrel 5, and the ejector rod 13 is slidably installed in the through hole provided by the mold base core 8, Corresponding to the pressure plate 14 located at the lower end of the mandrel 5, the ejector rod 13 moves up and down in the through hole of the mold base core 8, and the ejector sleeve 11 is slidably installed in the preset annular limit groove of the outer mold 10 and the inner mold 12 Corresponding to the ejector rod 13, the ejector rod 13 pushes the ejector sleeve to move up and down in the annular limiting groove.

The center of the main cylinder 1 is provided with a semi-open slot hole and the screw hole for assembling the flange 16 of the demoulding cylinder. After the platform 6 and the mold holder core 8 are connected, an inner cavity for fixing the demoulding hydraulic cylinder and its plunger 4 is formed. Cylinder 1 on. The upper oil hole 2 and the lower oil hole 3 lead to the demoulding hydraulic cylinder, and the other end is externally connected to the oil nozzle. Oil enters, the oil hole 2 discharges oil, and the plunger 4 of the demoulding cylinder is lifted.

The mandrel 5 is fixed on the demoulding cylinder plunger 4 by the bayonet flange 15, and the lower end is connected with the pressing plate 14, which can be threaded or pinned. Adopt bayonet flange 15 to fix, can keep mandrel 5 vertically, also can make pressure plate 14 on both sides balanced and uniform.

Die seat core 8 is established in the upper die seat 9 . Die base core 8 tops are provided with grooves, and the groove hole that is established with master cylinder 1 upper die table 6 is the same diameter. An inverted assembly boss is set on the side of the mold base core 8, which corresponds to the boss provided in the upper mold base 9. The mold base core 8 is placed in the upper mold base 9, supported by the boss of the upper mold base, and fixed on the upper mold base. 9 inside.

Die base core 9 is provided with at least a pair of through holes of slide-mounted ejector pins 13, and the number of through holes depends on the required demoulding force. The upper and lower ends of the through hole are provided with copper sleeves 7 to reduce the wear of the ejector pin 13 and the through holes of the mold holder core 8 .

The upper end of the ejector rod 13 has a ring-shaped spacer boss, which cooperates with the through hole provided by the touch seat core 8 to limit the downward stroke of the ejector rod 13, and is also convenient for the demoulding mechanism to be disassembled and installed.

Upper mold is made of outer mold 10 and inner mold 12, and outer mold 10 is provided with the annular boss of fixing inner mold 12, and inner mold 12 is embedded in the outer mold 10, is supported by the boss of outer mold 10. The outer mold 10 is also provided with an annular boss supporting the ejection sleeve 11, and the ejection sleeve 11 is placed in the annular limit groove formed by the preset annular boss of the outer mold 10 and the inner mold 12, and the ejection sleeve 11 can be Move up and down in the limit groove to transmit pressure. The inner mold 12 is also provided with a through hole corresponding to the through hole provided by the mold holder core 8 . The ejector pin 13 falls on the ejector sleeve 11 through the through hole provided by the mold base core 8 and the inner mold 12 to transmit pressure. The ejector sleeve 11 is an annular body, so that the workpiece is evenly stressed for demoulding.

The utility model is not limited to the structure of the embodiment shown in Figure 1, and the pushing workpiece can also have other structural deformations, for example, the inner mold 12 is directly connected to the mandrel 5, and the mandrel 5 is connected to the demoulding cylinder plunger 4, During demoulding, the inner mold 12 pushes the workpiece to separate the workpiece from the upper mold.

The demoulding of the present utility model is to work in the following manner: under the normal state, the demoulding cylinder plunger 4 is at the upper end of the demoulding hydraulic cylinder body. After the forging process starts, the main cylinder 1 is pressed down, the billet is deformed, and the ejector sleeve 11 is pushed upwards to straighten the upper part of the annular limit groove; Oil enters the oil hole 2, pushes the plunger 4 of the demoulding cylinder to move downward, the mandrel 5 is under pressure, the pressure is transmitted by the pressure plate 14 and the ejector rod 13, and the ejector sleeve 11 pushes the workpiece to separate the workpiece from the upper mold. After demoulding, the lower oil hole 3 enters the oil, the demoulding cylinder plunger 4 is lifted up, the mandrel 5 is lifted up, the ejector rod 13 naturally hangs down on the ejector sleeve 11, and the ejector sleeve 11 falls on the ring shape of the outer mold 10. On the boss, since the push force only overcomes the friction between the workpiece and the mold, the force is very small, such as a 90MN wheel forging press, and the pressure of the demoulding cylinder only needs a hydraulic cylinder with a capacity of 0.2MN.

Claims (7)

1. The upper demoulding device for tire die forging includes the main cylinder (1), the upper die table (6) and the upper die base (9) of the forging press connected successively to form a concentric cylinder, which is characterized in that the main cylinder (1), the upper A demoulding hydraulic cylinder and a demoulding liquid cylinder plunger (4) are arranged in the center of the mold table (6), the mold base core (9), and the demoulding liquid cylinder plunger (4) is connected with the mandrel (5) at the bottom, and The rod (13) is slidably installed in the through hole provided by the mold base core (8), corresponding to the pressing plate (14) located at the lower end of the mandrel (5), and the ejector sleeve (11) is slidably installed on the outer mold (10) and The inner mold (12) is preset in the annular limiting groove, corresponding to the push rod (13). 2. The upper demoulding device for tire die forging according to claim 1, characterized in that the center of the main cylinder (1), the upper mold platform (6), and the mold seat core (8) is provided with concentric and same-diameter slots, which constitute the setting of the demoulding device. The inner cavity of the mold hydraulic cylinder body and the demoulding cylinder plunger (4), the demoulding hydraulic cylinder and its plunger (4) are placed in the inner cavity, and are fixed on the main cylinder (1) by the demoulding cylinder flange (16). ) above; the main cylinder (1) side is provided with an upper oil hole (2) and a lower oil hole (3). 3. The demoulding device for tire die forging according to claim 1, characterized in that the upper end of the mandrel (5) is fixed on the plunger (4) of the demoulding cylinder by a bayonet flange (15), and the lower end is connected to the pressure plate ( 14) Connected by threads. 4. The upper demoulding device for tire die forging according to claim 1, characterized in that the upper mold base (9) is provided with a mold base core (8), the mold base core (8) is provided with a groove, and the side is provided with an inverted Assembling the boss, corresponding to the boss set in the upper die base (9), the die base core (8) is placed in the upper die base (9), supported by the boss provided by the upper die base; the die base core (8 ) at least one pair of through holes for sliding ejector rods (13), and copper sleeves (7) are provided at the upper and lower ends of the through holes, and the ejector rods (13) are slidably installed in the through holes and copper sleeves (7), and fall on the ejector Put (11) on. 5. The demoulding device for tire forging according to claim 4, characterized in that the upper end of the ejector rod (13) has a ring-shaped limiting boss, which is matched with the through hole provided on the seat core (8). 6. The mold forging upper demoulding device according to claim 1, characterized in that the upper mold is composed of an outer mold (10) and an inner mold (12), and the outer mold (10) is provided with a fixed inner mold (12). Annular boss, the inner mold (12) is embedded in the outer mold (10) and is supported by the outer mold (10). The outer mold (10) is also provided with a shape-limiting boss of the sliding ejection sleeve (11). (11) is placed in the annular limit groove formed by the preset annular boss of the outer mold (10) and the inner mold (12). 7. The demoulding device for tire forging according to claim 1, characterized in that the ejector sleeve (11) is an annular body.

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