A forging press and a forging process

Abstract

The present application relates to the field of forging technology, and more particularly to a forging press and a forging processing method, comprising a main cylinder, an accumulator, a forging assembly, an oil pressure station and a controller, the forging assembly is connected with the main cylinder and is driven to move, the accumulator can release pressure oil to the main cylinder, the oil pressure station provides pressure oil for the main cylinder and the accumulator, an accumulator charging valve assembly is connected between the oil pressure station and the accumulator, and a pressure release valve assembly is connected between the accumulator and the main cylinder; a first pressure sensor is arranged in the main cylinder, and a second pressure sensor is arranged in the accumulator, the first pressure sensor, the second pressure sensor, the accumulator charging valve assembly and the pressure release valve assembly are electrically connected with the controller. When the forging press performs cold forging processing, the forging processing power is provided by the main cylinder; when the forging press performs hot forging processing, the forging processing power is provided by the accumulator. The above-mentioned forging press and forging processing method can complete hot forging processing and cold forging processing on one forging press.

Description

Technical Field

[0001] This invention relates to the field of forging technology, and in particular to a forging press and a forging process. Background Technology

[0002] In the forging production of stainless steel hardware parts such as mobile phone cases, the first step is often hot forging. Hot forging involves heating the billet to a certain temperature and then forging it into a rough blank using a forging press. The rough blank is then tempered and followed by cold forging, which is also performed using a forging press.

[0003] The processing methods for hot forging and cold forging differ. Hot forging requires maintaining the workpiece at a high temperature and involves a large feed rate of the billet, thus necessitating a high forging speed. In contrast, cold forging involves work hardening during the forming process, so excessively high speeds are ineffective for shaping the workpiece. Therefore, slower speeds but higher pressures are required. In other words, the forging conditions for hot and cold forging are different. Existing technologies utilize dedicated hot and cold forging equipment, but this undoubtedly increases the equipment purchase costs for manufacturers, resulting in higher production costs. Summary of the Invention

[0004] The purpose of this invention is to provide a forging press and a forging process method that can complete both hot forging and cold forging with a single forging press, thus solving the problem of high equipment costs for manufacturers.

[0005] To achieve the above objectives, the present invention provides a forging press, comprising a main cylinder, an accumulator, a forging assembly, a hydraulic station, and a controller. The forging assembly is connected to and driven by the main cylinder. The accumulator can release pressurized oil to the main cylinder. The hydraulic station provides pressurized oil to the main cylinder and the accumulator. An accumulator charging valve assembly is connected between the hydraulic station and the accumulator. A pressure relief valve assembly is connected between the accumulator and the main cylinder. A first pressure sensor is installed in the main cylinder, and a second pressure sensor is installed in the accumulator. The first pressure sensor, the second pressure sensor, the accumulator charging valve assembly, and the pressure relief valve assembly are all electrically connected to the controller.

[0006] The present invention also provides a forging process method, which uses the forging press described above. The forging press can perform cold forging and hot forging. When the forging press performs cold forging, the forging power is provided by the main cylinder. When the forging press performs hot forging, the forging power is provided by the accumulator.

[0007] Furthermore, when the forging press performs cold forging, its operation is as follows: standby - main cylinder descends rapidly - main cylinder descends slowly - main cylinder applies pressure for forging - main cylinder holds pressure - main cylinder releases pressure - main cylinder returns rapidly - ejects material - pushes material back; when the forging press performs hot forging, its operation is as follows: standby - check if the accumulator is fully charged. If the check fails, continue charging. If the check passes, continue with subsequent operations - main cylinder descends rapidly - main cylinder descends slowly - main cylinder applies low pressure - accumulator releases pressure for forging - main cylinder holds pressure - main cylinder releases pressure - main cylinder returns rapidly - ejects material - pushes material back - accumulator charges.

[0008] Furthermore, the forging speed during hot forging is more than three times that during cold forging.

[0009] Furthermore, the accumulator is charged during loading and / or unloading.

[0010] Furthermore, during mass production, the accumulator is charged when loading and / or unloading between two adjacent workpieces.

[0011] Furthermore, during hot forging, the accumulator releases pressure for forging only after the main cylinder reaches a set pressure.

[0012] Furthermore, the set value reached by the master cylinder at low pressure is 30-50T.

[0013] Furthermore, the standard pressure for the accumulator to complete charging is 500-600T, and the pressure for each release of the accumulator is 50-60T.

[0014] The forging press and forging method provided by this invention, with the addition of an accumulator, allows for cold forging without the accumulator needing to operate; the hydraulic station directly drives the main cylinder, which in turn drives the forging assembly for normal pressurization. During hot forging, a second pressure sensor first checks if the accumulator is sufficiently charged. Once charged, subsequent actions are performed. The main cylinder descends to bring the forging assembly into contact with the workpiece. As pressurized oil continues to be added to the main cylinder, the internal pressure gradually increases. A first pressure sensor detects the real-time pressure inside the main cylinder. When the pressure reaches a set parameter, it indicates that the forging assembly is in close contact with the workpiece. At this point, the accumulator releases pressure, and the pressurized oil within it quickly fills the main cylinder. The main cylinder then drives the forging assembly to move rapidly and perform forging, meeting the requirements of hot forging. The forging press and forging method described above enable both hot and cold forging to be completed on a single press, eliminating the need for separate forging presses for cold and hot forging, thus saving on equipment purchase costs. Attached Figure Description

[0015] Figure 1 This is a front view of the forging press of the present invention;

[0016] Figure 2 This is a right view of the forging press of the present invention;

[0017] Figure 3 This is a diagram showing the sequence of operations for the forging process of the present invention.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1. Master cylinder; 2. Accumulator; 3. Forging assembly; 4. Hydraulic station; 5. Controller; 6. Accumulator charging valve assembly; 7. Pressure relief valve assembly. Detailed Implementation

[0020] The present invention will be described in detail below with reference to specific embodiments.

[0021] In this invention, unless otherwise explicitly specified and limited, terms such as "set in," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or a connection through one or more intermediate media. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The directional terms appearing in this invention are for the purpose of better describing the characteristics of the features and the relationships between them. It should be understood that when the orientation of this invention changes, the orientation of the characteristics of the features and the relationships between them also changes accordingly. Therefore, directional terms do not constitute an absolute spatial limitation on the characteristics of the features and the relationships between them, but only a relative limitation.

[0022] This invention provides a forging press, such as Figure 1 and Figure 2 As shown, it includes a main cylinder 1, an accumulator 2, a forging assembly 3, a hydraulic station 4, and a controller 5. The forging assembly 3 is connected to and driven by the main cylinder 1. The accumulator 2 can release pressurized oil to the main cylinder 1. The hydraulic station 4 provides pressurized oil to the main cylinder 1 and the accumulator 2. An accumulator charging valve assembly 6 is connected between the hydraulic station 4 and the accumulator 2, and a pressure relief valve assembly 7 is connected between the accumulator 2 and the main cylinder 1. A first pressure sensor (not shown) is installed in the main cylinder 1, and a second pressure sensor (not shown) is installed in the accumulator 2. The first pressure sensor, the second pressure sensor, the accumulator charging valve assembly 6, and the pressure relief valve assembly 7 are all electrically connected to the controller 5. The present invention also provides a forging processing method, such as... Figure 3As shown, the forging press described above can perform both cold forging and hot forging. When performing cold forging, the forging power is provided by the main cylinder 1; when performing hot forging, the forging power is provided by the accumulator 2. It should be noted that the forging power mentioned here does not include the power used by the main cylinder 1 to drive the forging assembly 3 downwards and backwards. In this design, regardless of whether it is cold or hot forging, the downward and backward movement of the forging assembly 3 is driven by the main cylinder 1. The difference lies in the forging power itself; this forging action is the processing action when the forging assembly 3 acts on the workpiece and deforms it.

[0023] Based on the above structural setup, the second pressure sensor detects the pressure inside the accumulator 2 in real time, and the first pressure sensor detects the pressure inside the master cylinder 1 in real time. The two pressure values ​​are aggregated to the controller 5. During hot forging, the controller 5 controls the action of the hydraulic station 4 and each valve assembly in a timely manner according to the detected pressure values, so as to determine whether hot forging has started and to accurately control the timing of each action.

[0024] In this forging method, during cold forging, the accumulator 2 does not need to operate; the hydraulic station 4 directly drives the main cylinder 1, which in turn drives the forging assembly 3 for normal pressurization and forging. During hot forging, the second pressure sensor first checks whether the accumulator 2 is sufficiently charged. Once the charge is sufficient, subsequent actions are performed. The main cylinder 1 moves downwards to bring the forging assembly 3 into contact with the workpiece. As the main cylinder 1 continues to be filled with pressurized oil, the internal pressure gradually increases. The first pressure sensor detects the real-time pressure inside the main cylinder 1. When the pressure inside the main cylinder 1 reaches the set parameter, it indicates that the forging assembly 3 is in close contact with the workpiece. At this point, the accumulator 2 releases pressure, and the pressurized oil in the accumulator 2 quickly fills the main cylinder 1. The main cylinder 1 then drives the forging assembly 3 to move rapidly and perform forging, meeting the requirements of hot forging.

[0025] In this embodiment, when the forging press performs cold forging, its operation is as follows: standby - main cylinder 1 descends rapidly - main cylinder 1 descends slowly - main cylinder 1 applies pressure for forging - main cylinder 1 holds pressure - main cylinder 1 releases pressure - main cylinder 1 returns rapidly - ejects material - pushes material back.

[0026] In this embodiment, the forging press operates as follows during hot forging: standby - check if the accumulator 2 is fully charged; if the check fails, continue charging; if the check passes, continue with subsequent actions - main cylinder 1 descends rapidly - main cylinder 1 descends slowly - main cylinder 1 applies low pressure - accumulator 2 releases pressure for forging - main cylinder 1 holds pressure - main cylinder 1 depressurizes - main cylinder 1 returns rapidly - ejects material - pushes material back - accumulator 2 charges. The main difference between hot forging and cold forging is that after the main cylinder 1 descends slowly to its position, it only applies low pressure. After the main cylinder 1 applies low pressure to the set value, the accumulator 2 releases pressure for forging. This low pressure is to ensure that the forging assembly 3 is in close contact with the workpiece. Furthermore, the pressure feedback from this low pressure allows the controller 5 to know whether the forging assembly 3 is in close contact with the workpiece. This eliminates the need to input the dimensions and thicknesses of different workpieces when processing different workpieces. The pressure feedback method used in this solution has the advantage of adaptability. Preferably, the set value for the low pressure reached by the main cylinder 1 is 30-50T, preferably 30T. Furthermore, once the forging assembly 3 is pressed tightly against the workpiece and has provided a certain degree of downward pressure, the workpiece is less likely to shift. This ensures the workpiece remains in place during subsequent forging by releasing pressure from the accumulator 2, thus improving the quality of the hot forging process.

[0027] In this embodiment, the forging speed during hot forging is more than three times that during cold forging. The standard pressure for the accumulator 2 to complete charging is 500-600T, preferably 600T, and the pressure released by the accumulator 2 each time is 50-60T, preferably 50T. The accumulator 2 has a large amount of energy that can ensure that the pressurized oil is injected into the master cylinder 1 quickly enough each time the pressure is released, so as to achieve the forging speed requirements of hot forging.

[0028] In this embodiment, during batch production, the accumulator 2 is charged when loading and / or unloading between two adjacent workpieces. This arrangement allows the charging of the accumulator 2 to not occupy production time, thereby improving production efficiency.

[0029] In summary, the forging press and forging method provided by this invention can complete both hot forging and cold forging on a single forging press. Manufacturers do not need to separately configure forging presses for cold forging and hot forging, thus saving equipment purchase costs.

[0030] Where there is no conflict, the above embodiments and features can be combined with each other.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A method of forging processing, characterized by, The forging press comprises a main cylinder, an accumulator, a forging assembly, an oil pressure station and a controller, the forging assembly is connected with the main cylinder and is driven to move, the accumulator can release pressure oil to the main cylinder, the oil pressure station provides pressure oil for the main cylinder and the accumulator, an accumulator charging valve assembly is connected between the oil pressure station and the accumulator, and a pressure release valve assembly is connected between the accumulator and the main cylinder; a first pressure sensor is arranged in the main cylinder, and a second pressure sensor is arranged in the accumulator, the first pressure sensor, the second pressure sensor, the accumulator charging valve assembly and the pressure release valve assembly are electrically connected with the controller; When the forging press is used for cold forging, the forging power is provided by the main cylinder, and the forging press has the following actions: standby, fast downward movement of the main cylinder, slow downward movement of the main cylinder, press forging of the main cylinder, pressure maintaining of the main cylinder, pressure release of the main cylinder, fast return of the main cylinder, material ejection and pushing back of the material; When the forging press is used for hot forging, the forging power is provided by the accumulator, and the forging press has the following actions: standby, detection of whether the accumulator is fully charged, if the detection fails, continue to charge, if the detection is successful, continue the subsequent actions, fast downward movement of the main cylinder, slow downward movement of the main cylinder, low pressure of the main cylinder, pressure release of the accumulator, pressure maintaining of the main cylinder, pressure release of the main cylinder, fast return of the main cylinder, material ejection, pushing back of the material and charging of the accumulator; wherein, the accumulator releases pressure for forging after the low pressure of the main cylinder reaches a set value.

2. The forging process according to claim 1, wherein The forging speed during hot forging is more than 3 times of the forging speed during cold forging.

3. The forging process of claim 2, wherein The accumulator is charged during feeding and / or discharging.

4. The swaging method according to claim 2, wherein During batch production, the accumulator is charged during feeding and / or discharging between two adjacent workpieces.

5. The method of claim 2, wherein The set value reached by the low pressure of the main cylinder is 30-50T.

6. The swaging method according to claim 2, wherein The pressure standard for completing the charging of the accumulator is 500-600T, and the pressure released by the accumulator each time is 50-60T.

Images