Pressure regulating device applied to powder cold press forming machine

Abstract

The utility model discloses a pressure regulating device for powder cold press forming machine, pressure seat is equipped with hydraulic cylinder in pressure seat top, is equipped with piston push rod in the hydraulic cylinder inside, and piston push rod is equipped on the reciprocating screw rod and does the reciprocating motion in the hydraulic cylinder with reciprocating screw rod's rotation, and reciprocating screw rod top end projects the outside of hydraulic cylinder and extends outward, and its end is connected with motor output end, and reciprocating screw rod is equipped with rubber sealing ring at the joint, is equipped with oil pump in the hydraulic cylinder top, is equipped with oil tank on one side of oil pump, and oil pump is used for sucking the hydraulic oil in the oil tank into the working hydraulic cylinder, and the reciprocating screw rod is driven to rotate through the motor, thereby driving the accurate up and down movement when driving piston push rod to go up and down, and the space in the hydraulic cylinder above piston push rod is sucked into the hydraulic oil through the oil pump, and the adjustment of the hydraulic oil amount is carried out according to the pressure in the hydraulic cylinder observed by the detection mechanism to complete the pressurization process, and the regulation of pressure is realized.

Description

Technical Field

[0001] This utility model relates to the field of pressure regulating devices, and more specifically, to a pressure regulating device applied to a powder cold pressing molding machine. Background Technology

[0002] Powder cold pressing machines can automatically and continuously press high-precision powder metallurgy parts with good surface finish in one operation. This not only saves a lot of raw materials and processing time compared to machining, but also has a wide range of applications and is highly favored by enterprises. In order to improve the working efficiency of fully automatic powder cold pressing machines, pressure regulating devices are often used. The use of pressure regulating devices allows the fully automatic powder cold pressing machines to work better. When electro-hydraulic servo drive technology is applied to powder cold pressing machines, high-precision pressure control can be achieved by precisely controlling the hydraulic system through a servo motor.

[0003] However, while current powder cold pressing molding machines also have the characteristics of high-efficiency production, they may have insufficient pressure regulation accuracy in the pressure control during the pressurization process, and long-term high-pressure operation will accelerate mold wear.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0005] In view of the problems in the related technologies, this utility model proposes a pressure regulating device for use in a powder cold pressing molding machine to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] Therefore, the specific technical solution adopted by this utility model is as follows:

[0007] A pressure regulating device for a powder cold pressing molding machine includes a pressure base, a hydraulic cylinder above the pressure base, a piston rod inside the hydraulic cylinder, the piston rod being sleeved on a reciprocating screw and reciprocating within the hydraulic cylinder as the reciprocating screw rotates, the top of the reciprocating screw extending outward from the outside of the hydraulic cylinder and connected to the output end of a motor, a rubber sealing ring being provided at the connection between the reciprocating screw and the hydraulic cylinder, an oil pump above the hydraulic cylinder, and an oil reservoir on one side of the oil pump, the oil pump being used to draw hydraulic oil from the oil reservoir into the working hydraulic cylinder.

[0008] Furthermore, a rubber sealing ring is provided at the connection between the top and the reciprocating lead screw, a pressure seat is welded to the piston push rod, and a pressure column is provided at the bottom of the pressure seat.

[0009] Furthermore, in order to achieve pressure regulation of the powder cold pressing molding machine, connecting columns are provided at the four corners of the top of the hydraulic cylinder, and support plates are connected to the top of the connecting columns, with the bottom of the oil pump connected to the support plates.

[0010] Furthermore, in order to make the pressure inside the hydraulic cylinder adjustable, an oil inlet pipe is connected to the oil pump inlet, with the end of the oil inlet pipe away from the oil pump extending into and connecting to the inside of the oil reservoir, and an oil outlet pipe is connected to the oil pump outlet, with the end of the oil outlet pipe away from the oil pump extending into and connecting to the inside of the hydraulic cylinder.

[0011] Furthermore, to ensure the internal sealing of the hydraulic cylinder, a solenoid valve is installed at the connection between the oil outlet pipe and the hydraulic cylinder, and sealing rubber rings are installed at the connections between the oil outlet pipe, the oil inlet pipe and the oil reservoir, the hydraulic cylinder and the oil pump.

[0012] Furthermore, in order to detect and observe the pressure inside the hydraulic cylinder, a detection mechanism is provided on one side of the hydraulic cylinder;

[0013] The testing mechanism includes a testing chamber with a scale installed on one side. A spring is installed inside the testing chamber, with a pointer rod welded to one end of the spring and a movable plate welded to the other end of the spring. The movable plate is slidably connected inside the testing chamber.

[0014] Furthermore, to facilitate observation of the pressure inside the hydraulic cylinder, a scale is provided on one side of the pointer rod, with the end of the scale connected to the detection chamber, and a pointer connected to the pointer rod.

[0015] The beneficial effects of this utility model are as follows: the reciprocating screw is driven by a motor to rotate, thereby driving the piston push rod to make precise up and down movements during the upward and downward strokes; the hydraulic oil is pumped into the space above the piston push rod in the hydraulic cylinder by an oil pump, which helps to increase the downward speed of the piston push rod; when the piston push rod descends to the predetermined position for mold closing, the motor speed decreases, and after the mold closing is completed, the oil pump starts, pumping hydraulic oil into the space above the working piston in the hydraulic cylinder. The pressure inside the hydraulic cylinder is observed by a detection mechanism to adjust the amount of hydraulic oil, thereby completing the pressurization process and realizing pressure regulation. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of a pressure regulating device applied to a powder cold pressing machine according to an embodiment of the present utility model;

[0018] Figure 2 This is a rear view of a pressure regulating device applied to a powder cold pressing machine according to an embodiment of the present utility model;

[0019] Figure 3This is a detailed internal structure diagram of a pressure regulating device applied to a powder cold pressing machine according to an embodiment of the present utility model;

[0020] Figure 4 This is a detailed drawing of a detection mechanism in a pressure regulating device applied to a powder cold pressing machine, according to an embodiment of the present invention.

[0021] In the picture:

[0022] 1. Pressure column; 2. Pressure seat; 3. Piston push rod; 4. Hydraulic cylinder; 5. Detection mechanism; 501. Detection chamber; 502. Spring; 503. Pointer rod; 504. Scale; 505. Pointer; 506. Moving plate; 6. Oil outlet pipe; 7. Connecting column; 8. Motor; 9. Support plate; 10. Oil pump; 11. Oil inlet pipe; 12. Oil reservoir; 13. Reciprocating lead screw; 14. Solenoid valve. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] According to an embodiment of the present invention, a pressure regulating device for use in a powder cold pressing molding machine is provided.

[0025] Example 1;

[0026] like Figures 1-3As shown, a pressure regulating device for a powder cold pressing molding machine according to an embodiment of the present invention includes a pressure base 2, a hydraulic cylinder 4 above the pressure base 2, and several pressure columns 1 at the bottom of the pressure base 2. A piston push rod 3 is located inside the hydraulic cylinder 4. The pressure base 2 is welded to the bottom end of the piston push rod 3. The piston push rod 3 is sleeved on a reciprocating lead screw 13 and reciprocates within the hydraulic cylinder 4 as the reciprocating lead screw 13 rotates. The top end of the reciprocating lead screw 13 extends outward from the outside of the hydraulic cylinder 4, and its end is connected to the output end of a motor 8. The motor 8 drives the reciprocating lead screw 13 to rotate. This drives the piston push rod 3 to move precisely up and down during its upward and downward strokes. A rubber sealing ring is provided at the connection between the top of the piston push rod 3 and the reciprocating lead screw 13, and a rubber sealing ring is also provided at the connection between the reciprocating lead screw 13 and the hydraulic cylinder 4. These rubber sealing rings seal the gaps at the connection points, increasing the sealing performance inside the hydraulic cylinder 4. An oil pump 10 is located above the hydraulic cylinder 4. The oil pump 10 is a blowout-proof oil pump. An oil reservoir 12 is located on one side of the oil pump 10 and is connected to one side of the hydraulic cylinder 4. The oil pump 10 is used to pump hydraulic oil from the oil reservoir 12 into the working hydraulic cylinder 4. Hydraulic oil is pumped into the hydraulic cylinder 4 by the oil pump 10, which is located in the space above the piston rod 3. This helps to increase the downward speed of the piston rod 3. Connecting posts 7 are located at the four corners of the top of the hydraulic cylinder 4. Support plates 9 are connected to the top of the connecting posts 7. The bottom of the oil pump 10 is connected to the support plates 9. An oil inlet pipe 11 is connected to the oil inlet of the oil pump 10. The end of the oil inlet pipe 11 away from the oil pump 10 extends into and connects to the inside of the oil storage tank 12. An oil outlet pipe 6 is connected to the oil outlet of the oil pump 10. The end of the oil outlet pipe 6 away from the oil pump 10 extends into and connects to the inside of the hydraulic cylinder 4. When the motor 8 drives... When the piston rod 3 moves down to the predetermined position for mold closing, the speed of the motor 8 decreases. After the mold closing is completed, the oil pump 10 starts and draws hydraulic oil into the space above the working piston in the hydraulic cylinder 4 to adjust the amount of hydraulic oil, thereby completing the pressurization process and achieving pressure regulation. A solenoid valve 14 is provided at the connection between the oil outlet pipe 6 and the hydraulic cylinder 4. The solenoid valve 14 controls the opening and closing of the oil outlet pipe 6 to prevent hydraulic oil leakage. The oil outlet pipe 6, the oil inlet pipe 11, and the oil storage tank 12, the hydraulic cylinder 4, and the oil pump 10 are all connected by flanges to prevent hydraulic oil leakage at the connection and improve the sealing performance of the device.

[0027] Example 2;

[0028] like Figure 4As shown, a pressure regulating device for a powder cold pressing molding machine according to an embodiment of the present invention includes a hydraulic cylinder 4. A detection mechanism 5 is provided on one side of the hydraulic cylinder 4. The detection mechanism 5 includes a detection chamber 501. A circular hole is provided at the connection between the hydraulic cylinder 4 and the detection chamber 501. A scale 504 is installed on one end of the detection chamber 501. A spring 502 is provided inside the detection chamber 501. A pointer rod 503 is welded to one end of the spring 502, and a moving plate 506 is welded to the other end of the spring 502. The moving plate 506 is slidably connected inside the detection chamber 501. A scale 504 is provided on one side of the pointer rod 503. The end of the scale 504 is connected to the detection chamber 501. A pointer 505 is connected to the pointer rod 503. The pressure inside the hydraulic cylinder 4 is discharged through the circular hole and pushes the pointer rod 503 outward. The pointer 505 on the pointer rod 503 indicates the current pressure inside the hydraulic cylinder 4 on the scale 504. By observing the pressure inside the hydraulic cylinder 4 through the detection mechanism 5, the hydraulic oil volume is adjusted to complete the pressurization process and realize pressure regulation.

[0029] In summary, with the help of the above-mentioned technical solution of this utility model, when in use, the motor 8 is started, the motor 8 drives the reciprocating screw 13 to rotate, causing the piston push rod 3 to move downwards to the predetermined mold closing position for mold closing. After the mold closing is completed, the motor 8 stops, the reciprocating screw 13 stops rotating, the oil pump 10 is started, the pressure inside the hydraulic cylinder 4 is determined by observing the detection mechanism 5 on one side of the hydraulic cylinder 4, the solenoid valve 14 at the end of the oil outlet pipe 6 is opened, and the hydraulic oil in the oil storage tank is drawn into the hydraulic cylinder 4 to complete the pressure adjustment.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pressure regulating device for use in a powder cold pressing machine, characterized in that, The system includes a pressure seat (2), a hydraulic cylinder (4) is provided above the pressure seat (2), a piston push rod (3) is provided inside the hydraulic cylinder (4), the piston push rod (3) is sleeved on the reciprocating screw (13) and it reciprocates in the hydraulic cylinder (4) as the reciprocating screw (13) rotates. The top of the reciprocating screw (13) extends outward from the outside of the hydraulic cylinder (4) and its end is connected to the output end of the motor (8). A rubber sealing ring is provided at the connection between the reciprocating screw (13) and the hydraulic cylinder (4). An oil pump (10) is provided above the hydraulic cylinder (4), and an oil storage tank (12) is provided on one side of the oil pump (10). The oil pump (10) is used to draw the hydraulic oil in the oil storage tank (12) into the working hydraulic cylinder (4).

2. The pressure regulating device for a powder cold pressing machine according to claim 1, characterized in that, A rubber sealing ring is provided at the connection between the top of the piston push rod (3) and the reciprocating screw (13). A pressure seat (2) is welded to the bottom of the piston push rod (3), and a pressure column (1) is provided at the bottom of the pressure seat (2).

3. The pressure regulating device for a powder cold pressing machine according to claim 1, characterized in that, The hydraulic cylinder (4) has connecting columns (7) at the four corners of its top. The top of the connecting columns (7) is connected to a support plate (9), and the bottom of the oil pump (10) is connected to the support plate (9).

4. The pressure regulating device for a powder cold pressing machine according to claim 1, characterized in that, An oil inlet pipe (11) is connected to the oil inlet of the oil pump (10). The end of the oil inlet pipe (11) away from the oil pump (10) extends into and connects to the inside of the oil storage tank (12). An oil outlet pipe (6) is connected to the oil outlet of the oil pump (10). The end of the oil outlet pipe (6) away from the oil pump (10) extends into and connects to the inside of the hydraulic cylinder (4).

5. A pressure regulating device for a powder cold pressing machine according to claim 4, characterized in that, A solenoid valve (14) is provided at the connection between the oil outlet pipe (6) and the hydraulic cylinder (4). Sealing rubber rings are provided at the connection between the oil outlet pipe (6), the oil inlet pipe (11) and the oil storage tank (12), the hydraulic cylinder (4) and the oil pump (10).

6. A pressure regulating device for a powder cold pressing machine according to claim 1, characterized in that, A detection mechanism (5) is provided on one side of the hydraulic cylinder (4); The testing mechanism (5) includes a testing chamber (501), a scale (504) is installed on one side of the testing chamber (501), a spring (502) is provided inside the testing chamber (501), a pointer rod (503) is welded to one end of the spring (502), and a moving plate (506) is welded to the other end of the spring (502), and the moving plate (506) is slidably connected inside the testing chamber (501).

7. A pressure regulating device for a powder cold pressing machine according to claim 6, characterized in that, A scale (504) is provided on one side of the pointer rod (503), and the end of the scale (504) is connected to the detection chamber (501). A pointer (505) is connected to the pointer rod (503).

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