阅读说明：本技术 一种压力机过载保护控制装置 (Overload protection control device for press machine ) 是由 陆召庭 于 2019-10-22 设计创作，主要内容包括：本发明公开了一种压力机过载保护控制装置,包括过负载保护阀、预充压力系统、监控组件、稳压阀,所述过负载保护阀与压力机滑块内缸体的高压油室连接,所述预充压力系统、所述监控组件、所述稳压阀分别与所述过负载保护阀连接,所述预充压力系统、所述监控组件、所述稳压阀分别与油箱连接,所述稳压阀与所述预充压力系统连接。通过设置过负载保护阀对压力机滑块内缸体的高压油室进行预充压力的设定,并由预充压力系统用于对高压油室进行预充油液或过载卸荷后的补充油液,再通过稳压阀对预充压力的精确控制以及监控组件对过负荷保护阀最终过载开启压力的监控,真正做到压力机的安全防护,降低客户投入成本,增加压力机的使用安全性。(The invention discloses an overload protection control device of a press machine, which comprises an overload protection valve, a pre-charging pressure system, a monitoring assembly and a pressure stabilizing valve, wherein the overload protection valve is connected with a high-pressure oil chamber of an inner cylinder body of a slide block of the press machine, the pre-charging pressure system, the monitoring assembly and the pressure stabilizing valve are respectively connected with the overload protection valve, the pre-charging pressure system, the monitoring assembly and the pressure stabilizing valve are respectively connected with an oil tank, and the pressure stabilizing valve is connected with the pre-charging pressure system. Carry out the settlement of pre-charge pressure through setting up overload protection valve to the high-pressure oil chamber of press slider inner cylinder body to be used for carrying out pre-charge fluid or the supplementary fluid after the overload off-load to the high-pressure oil chamber by pre-charge pressure system, rethread pressure stabilizing valve is to pre-charge pressure's accurate control and the control subassembly to the final overload opening pressure's of overload protection valve control, really accomplishes the safety protection of press, reduces customer input cost, increases the safety in utilization of press.)

1. The utility model provides a press overload protection controlling means which characterized in that: the hydraulic pressure monitoring device is characterized by comprising an overload protection valve (1), a pre-charging pressure system (2), a monitoring assembly (3) and a pressure stabilizing valve (4), wherein the overload protection valve (1) is connected with a high-pressure oil chamber (5) of a press slide inner cylinder body, the pre-charging pressure system (2), the monitoring assembly (3) and the pressure stabilizing valve (4) are respectively connected with the overload protection valve (1), the pre-charging pressure system (2), the monitoring assembly (3) and the pressure stabilizing valve (4) are respectively connected with an oil tank (6), and the pressure stabilizing valve (4) is connected with the pre-charging pressure system (2).

2. An overload protection control device for a press machine according to claim 1, wherein: the pre-charging pressure system (2) comprises a pressure regulating valve (21), a reversing electromagnetic valve (22) and a pneumatic pump (23), the pressure regulating valve (21) and the pneumatic pump (23) are respectively connected with the reversing electromagnetic valve (22), the pneumatic pump (23) is connected with the oil tank (6), and the overload protection valve (1) and the pressure stabilizing valve (4) are respectively connected with the pneumatic pump (23).

3. An overload protection control device for a press machine according to claim 2, wherein: the pre-charging system (2) further comprises a pressure gauge (24), and the pressure gauge (24) is connected with the pressure regulating valve (21).

4. An overload protection control device for a press machine according to claim 2, wherein: the pre-charging pressure system (2) further comprises a first one-way valve (25), and the first one-way valve (25) is arranged between the pneumatic pump (23) and the oil tank (6).

5. An overload protection control device for a press machine according to claim 2, wherein: the pneumatic protection device is characterized by further comprising a second check valve (7), wherein the load protection valve (1) and the pneumatic pump (23) are respectively connected with the second check valve (7).

6. An overload protection control device for a press machine according to claim 1, wherein: the monitoring assembly (3) comprises a pressure limiting valve (31) and a pressure detecting switch (32), the pressure detecting switch (32) is connected with the pressure limiting valve (31), the pressure limiting valve (31) is connected with the oil tank (6), and the load protection valve (1) is connected with the pressure limiting valve (31).

7. An overload protection control device for a press machine according to claim 1, wherein: the overload protection valve is characterized by further comprising a manual unloading valve (8), the manual unloading valve (8) is connected with the overload protection valve (1), and the oil tank (6) is connected with the manual unloading valve (8).

8. An overload protection control device for a press machine according to claim 1, wherein: the oil tank is characterized by further comprising a throttle valve (9), wherein the throttle valve (9) is arranged between the pressure maintaining valve (4) and the oil tank (6).

Technical Field

The invention relates to an overload protection device, in particular to an overload protection control device of a press machine.

Background

The overload protection of the existing press is generally a safety block type or pneumatic hydraulic overload protection.

For the press machine with the safety block type overload protection, the overload protection needs to be carried out on the dangerous section of the safety block to play a safety protection role, the shearing force of the dangerous section of the safety block is related to various factors such as materials, heat treatment, machining size, chamfering and the like, so that the protection pressure control point of the safety block is extremely unstable during the stamping work of the press machine, the overload protection role cannot be really and effectively played, the safety block is damaged and needs to be replaced after each overload, the replacement cost is high, and the replaced safety block is difficult to be completely matched with the press machine like the safety block.

The pneumatic hydraulic overload protection device is affected by the pressure of an air source, the pressure of the air source of the press machine needs to be correspondingly adjusted according to the clutch torque of the clutch and the balance pressure of the balance cylinder, and meanwhile, the air has certain compressibility, so that the overload protection device also has certain instability during overload protection of the press machine.

Disclosure of Invention

The purpose of the invention is as follows: in view of the above problems, an object of the present invention is to provide an overload protection control device for a press machine, which can realize stable and effective overload protection for the press machine and ensure the safety of the press machine.

The technical scheme is as follows: the overload protection control device of the press comprises an overload protection valve, a pre-charging pressure system, a monitoring assembly and a pressure stabilizing valve, wherein the overload protection valve is connected with a high-pressure oil chamber of an inner cylinder body of a press slide block, the pre-charging pressure system, the monitoring assembly and the pressure stabilizing valve are respectively connected with the overload protection valve, the pre-charging pressure system, the monitoring assembly and the pressure stabilizing valve are respectively connected with an oil tank, and the pressure stabilizing valve is connected with the pre-charging pressure system.

The high-pressure oil chamber of the inner cylinder body of the press ram is a transmission hydraulic chamber of the press ram stamping force, the overload protection valve is used for setting the pre-charging pressure of the high-pressure oil chamber, the pre-charging pressure system is used for pre-charging oil liquid into the high-pressure oil chamber when the press is in a normal working state, the high-pressure oil chamber is filled with the high-pressure oil liquid, when the pressure transmitted during the stamping of the press is greater than the pre-charging pressure set by the overload protection valve of the high-pressure oil chamber, the oil liquid in the high-pressure oil chamber is unloaded through the overload protection valve, the pre-charging pressure system is also used for supplementing the oil liquid after the overload unloading, the pressure stabilizing valve is used for accurately controlling the pre-charging pressure, the fit clearance of related parts in the high-pressure oil chamber is ensured to be eliminated, the stamping precision of the press is ensured, the monitoring assembly, the function of really protecting the press machine is achieved.

Furthermore, the pre-charging pressure system comprises a pressure regulating valve, a reversing electromagnetic valve and a pneumatic pump, wherein the pressure regulating valve and the pneumatic pump are respectively connected with the reversing electromagnetic valve, the pneumatic pump is connected with the oil tank, and the overload protection valve and the pressure stabilizing valve are respectively connected with the pneumatic pump.

After the pressure of the air inlet source is adjusted through the pressure adjusting valve, the pneumatic pump is controlled through the reversing electromagnetic valve, and the pneumatic pump sucks oil from the oil tank under the action of pressure difference, so that pre-charging oil or supplementing oil after overload unloading is carried out on the high-pressure oil chamber.

Furthermore, the pre-charging pressure system also comprises a pressure gauge, and the pressure gauge is connected with the pressure regulating valve.

The pressure gauge is used for displaying the pressure after the pressure regulating valve regulates the pressure.

Furthermore, the pre-charging pressure system further comprises a first one-way valve, and the first one-way valve is arranged between the pneumatic pump and the oil tank.

Furthermore, the device also comprises a second one-way valve, and the load protection valve and the pneumatic pump are respectively connected with the second one-way valve.

The check valve is used for preventing the impact and the backflow of the oil.

Furthermore, the monitoring assembly comprises a pressure limiting valve and a pressure detecting switch, the pressure detecting switch is connected with the pressure limiting valve, the pressure limiting valve is connected with the oil tank, and the load protection valve is connected with the pressure limiting valve.

The pressure limiting valve and the pressure detecting switch are used for setting the final overload opening pressure of the overload protection valve and ensuring the stability of the overload pressure of the press machine, so that the overload pressure of the press machine is accurately controlled and the effect of really protecting the press machine is achieved.

Furthermore, the device also comprises a manual unloading valve, the manual unloading valve is connected with the overload protection valve, and the oil tank is connected with the manual unloading valve.

The manual unloading valve can manually unload the pre-charging pressure and the oil liquid in the oil chamber of the inner cylinder body, so that the mold combination fault is relieved.

Furthermore, the device also comprises a throttle valve, and the throttle valve is arranged between the pressure stabilizing valve and the oil tank.

Has the advantages that: compared with the prior art, the invention has the advantages that: carry out the settlement of pre-charge pressure through setting up overload protection valve to the high-pressure grease chamber of press slider inner cylinder body, and be used for carrying out pre-charge fluid or the supplementary fluid after the overload off-load to the high-pressure grease chamber by pre-charge pressure system, rethread pressure stabilizing valve is to pre-charge pressure's accurate control and the control of control subassembly to the final overload opening pressure of overload protection valve, really accomplish the safety protection of press, reduce customer input cost, increase the safety in utilization of press, overcome the miscellaneous mechanism of redundant in the current structure, reduce later maintenance and change expense, reduce cost, very big saving the preparation and the cost of remaking, and made things convenient for overload device's manufacturing implementation, promote overall structure's reliability.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Detailed Description

The present invention will be further illustrated with reference to the following figures and specific examples, which are to be understood as merely illustrative and not restrictive of the scope of the invention.

An overload protection control device of a press machine is shown in figure 1 and comprises an overload protection valve 1, a pre-charging pressure system 2, a monitoring assembly 3, a pressure stabilizing valve 4, an oil tank 6, a one-way valve II 7, a manual unloading valve 8 and a throttle valve 9, wherein the pre-charging pressure system 2 comprises a pressure regulating valve 21, a reversing solenoid valve 22, a pneumatic pump 23, a pressure gauge 24 and a one-way valve I25, and the monitoring assembly 3 comprises a pressure limiting valve 31 and a pressure detecting switch 32.

The pressure gauge 24 is connected with the pressure regulating valve 21, the pressure regulating valve 21 and the pneumatic pump 23 are respectively connected with the reversing solenoid valve 22, the pneumatic pump 23 is connected with the oil tank 6, the one-way valve I25 is arranged between the pneumatic pump 23 and the oil tank 6, the overload protection valve 1 is connected with the high-pressure oil chamber 5 of the inner cylinder body of the press slide block, the overload protection valve 1 and the pressure stabilizing valve 4 are respectively connected with the pneumatic pump 23, the one-way valve II 7 is arranged between the load protection valve 1 and the pneumatic pump 23, the pressure stabilizing valve 4 is connected with the overload protection valve 1 and communicated with the oil tank 6, the throttle valve 9 is arranged between the pressure stabilizing valve 4 and the oil tank 6, the pressure detecting switch 32 is connected with the pressure limiting valve 31, the pressure limiting valve 31 is connected with the oil tank 6, the load protection valve 1 is connected with the pressure limiting valve 31, the manual unloading valve.

The high-pressure oil chamber of the inner cylinder body of the press ram is a transmission hydraulic chamber of the stamping force of the press ram, the overload protection valve is used for setting the pre-charging pressure of the high-pressure oil chamber, accurate control is realized through the pressure stabilizing valve, the fit clearance of relevant parts in the oil chamber is ensured to be eliminated, the stamping precision of the press is ensured, the pressure limiting valve and the pressure detecting switch are used for setting the final overload opening pressure of the overload protection valve, the stability of the overload pressure of the press is ensured, the overload pressure of the press is accurately controlled, and the purpose of really protecting the press is achieved.

The air inlet source is connected with the pressure regulating valve, the pressure of the air inlet source is regulated through the pressure regulating valve, the pressure after regulation is displayed through the pressure gauge, under the normal condition, the pre-charging pressure is about 22 times of the pressure of the air inlet source, after the pressure regulating valve regulates the pressure of the air inlet source, the pneumatic pump is controlled through the reversing solenoid valve, the pneumatic pump sucks oil from the oil tank under the action of differential pressure, and the high-pressure oil chamber is pre-charged with the oil.

When the press is in a normal working state, the high-pressure oil chamber is filled with high-pressure oil, and when the pressure transmitted during the stamping of the press is greater than the pre-charging pressure set by the overload protection valve of the high-pressure oil chamber, the pressure detection switch makes a corresponding response to unload the oil in the high-pressure oil chamber through the overload protection valve, so that the effective unloading and overload protection of the press are realized; the pre-charging pressure system is also used for supplementing oil liquid after overload unloading, so that the oil pressure in the high-pressure oil chamber returns to the pressure value of the pre-charging oil liquid again, a one-way valve II is additionally arranged on an oil inlet pipeline for the work of a pneumatic pump in consideration of the impact and the backflow of the oil liquid, and meanwhile, in order to effectively prevent the press machine from being difficult to start during die combination, a manual unloading valve is additionally arranged, so that the pre-charging pressure and the oil liquid in the high-pressure oil chamber of the cylinder body in the sliding block can be manually unloaded, and.

The device adopts the separated control, the pre-charging pressure and the overload monitoring protection are separated, and the stability and the controllability of the pressure of the high-pressure oil chamber are realized; the pressure limiting valve is adopted, the overload pressure can be effectively adjusted, the pressure detection switch can effectively monitor the overload pressure, the manual unloading valve can effectively relieve and control the die failure, the safety protection of the press machine is really realized, the input cost of a customer is reduced, the use safety of the press machine is improved, the redundant and miscellaneous mechanisms in the existing structure are overcome, the later maintenance and replacement cost is reduced, the manufacturing and remanufacturing cost is greatly saved, the manufacturing and implementation of the overload device are facilitated, and the reliability of the whole structure is improved.