Ultralow-temperature servo press

Abstract

The utility model discloses an ultralow-temperature servo press, which belongs to the technical field of metal detection and comprises a frame and a servo pump control system mounted at the bottom of the frame, and a forming main oil cylinder is mounted in the frame. The forming tool is mounted on the forming main oil cylinder; the main oil cylinder force sensor is installed between the forming main oil cylinder and the forming tool. The first blank pressing oil cylinder and the second blank pressing oil cylinder are located outside the two sides of the forming main oil cylinder respectively and installed in the frame. The movable beam is mounted on the blank pressing oil cylinder I and the blank pressing oil cylinder II; blank pressing force sensors are installed between the moving beam and the first blank pressing oil cylinder and between the moving beam and the second blank pressing oil cylinder respectively. The blank pressing tool is installed on an upper cross beam in the frame, and a sample is arranged between the forming tool and the blank pressing tool. According to the design of the device, the blank holder force, the forming force and the compression force of a sample can be respectively tested in a conventional environment and an ultralow-temperature environment.

Description

Technical Field

[0001] The utility model belongs to the technical field of metal detection, and particularly relates to an ultra-low temperature servo press. Background Art

[0002] In the prior art, it is usually necessary to simulate the stress state of materials under actual working conditions to conduct mechanical property and strength tests, so as to obtain more comprehensive test data. Among them, it is mainly necessary to conduct tests on blank holding force, forming force and compressive force. Content of the Utility Model

[0003] In view of the above problems in the prior art, the purpose of the utility model is to provide an ultra-low temperature servo press.

[0004] The utility model provides the following technical solutions:

[0005] An ultra-low temperature servo press includes a frame, a servo pump control system installed in the frame, a forming main cylinder installed in the frame; a forming tooling is installed on the forming main cylinder; a main cylinder force sensor is installed between the forming main cylinder and the forming tooling; a blank holding cylinder one and a blank holding cylinder two are respectively located outside both sides of the forming main cylinder and installed in the frame; a moving beam is installed on the blank holding cylinder one and the blank holding cylinder two; blank holding force sensors are respectively installed between the moving beam and the blank holding cylinder one and the blank holding cylinder two; a blank holding tooling is installed on the upper crossbeam in the frame, and a specimen is placed between the forming tooling and the blank holding tooling.

[0006] Specifically, the servo pump control system includes a servo pump one and a servo pump two.

[0007] Specifically, the oil outlet of the servo pump one is communicated with the oil inlet of the forming main cylinder, the oil outlet of the servo pump one is communicated with the oil inlet of the blank holding cylinder one through solenoid valves Y1 and Y2, and the oil outlet of the servo pump one is communicated with the oil inlet of the blank holding cylinder two through solenoid valves Y1 and Y2; the oil outlet of the servo pump two is communicated with the oil inlet of the blank holding cylinder one through solenoid valves Y3 and Y4, the oil outlet of the servo pump two is communicated with the oil inlet of the blank holding cylinder two through solenoid valves Y3 and Y4, and the oil outlet of the copper wire servo pump two is communicated with the oil inlet of the forming main cylinder through solenoid valves Y1, Y2, Y3 and Y4.

[0008] Specifically, a tapered hole is provided on the upper crossbeam.

[0009] Specifically, a through hole is provided on the blank holding tooling.

[0010] Specifically, a displacement sensor is further provided in the moving beam.

[0011] Specifically, a displacement sensor is further provided in the forming tooling.

[0012] The beneficial effects of the present utility model are as follows:

[0013] The design of this device can conduct tests on the blank holding force, forming force, and compression force of specimens under normal environment and ultra-low temperature environment respectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0015] Figure 1 is a schematic diagram of the internal structure of the present utility model;

[0016] Figure 2 is a hydraulic schematic diagram of the present utility model;

[0017] Figure 3 is an electromagnetic action sequence table of the present utility model;

[0018] The labels in the figure are: 1, servo pump control system; 3, forming main oil cylinder; 4, main oil cylinder force sensor; 5, blank holding oil cylinder one; 6, blank holding oil cylinder two; 7, blank holding force sensor; 8, moving beam; 9, specimen; 10, blank holding tooling; 11, upper crossbeam; 12, forming tooling;

[0019] 1.1, servo pump one; 1.2, servo pump two. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The ultra-low temperature servo press designed by this device can test the mechanical properties and strength of metal composite materials at extremely low temperatures, and at the same time can realize the loading switching between single-action and double-action modes. It can not only apply blank holding and forming forces, but also apply compression force, so as to simulate the stress state of materials in actual working conditions and provide more comprehensive test data. Compared with the single-action mode, the device can apply a greater compression force in the double-action mode, so as to test metal composite materials with different strengths.

[0021] Such as Figure 1As shown in the figure, the present utility model provides an ultra-low temperature servo press, which includes a frame, a servo pump control system 1 installed at the bottom of the frame, a forming main cylinder 3 installed inside the frame, a forming tooling 12 installed on the forming main cylinder 3, and a main cylinder force sensor 4 installed between the forming main cylinder 3 and the forming tooling 12; a blank holding cylinder 1 5 and a blank holding cylinder 2 6 are respectively located outside both sides of the forming main cylinder 3, and the blank holding cylinder 1 5 and the blank holding cylinder 2 6 are installed inside the frame. A moving beam 8 is installed on the blank holding cylinder 1 5 and the blank holding cylinder 2 6, and blank holding force sensors 7 are installed between the moving beam 8 and the blank holding cylinder 1 5 and the blank holding cylinder 2 6 respectively. A blank holding tooling 10 is installed on the upper crossbeam 11 inside the frame, and a specimen 9 is placed between the forming tooling 12 and the blank holding tooling 10.

[0022] Among them, the servo pump control system 1 includes a servo pump 1 1.1 and a servo pump 2 1.2. At the same time, the main cylinder force sensor 4 and the blank holding force sensors 7 feed back the measurement results to the controller, and the controller controls the servo pump system 1 to control the output forces of the blank holding cylinder 1 5, the blank holding cylinder 2 6 and the forming main cylinder 3 to achieve force closed-loop control.

[0023] Specifically, a conical hole is provided on the upper crossbeam 12, and a through hole is provided on the blank holding tooling 10. When the specimen 9 needs to be in an ultra-low temperature environment, the staff can pass liquid nitrogen through the conical hole and the through hole to the specimen 9, so that the specimen is in an ultra-low temperature environment.

[0024] Furthermore, displacement sensors are also provided inside the moving beam 8 and the forming tooling 12. The displacement sensors feed back the measurement results to the controller, and the controller controls the servo pump system 1 to control the output displacements of the blank holding cylinder 1 5, the blank holding cylinder 2 6 and the forming main cylinder 3 to achieve displacement closed-loop control.

[0025] Please refer to Figure 2 and 3 , the oil outlet of the servo pump 1 1.1 is communicated with the oil inlet of the forming main cylinder 3, the oil outlet of the servo pump 1 1.1 is communicated with the oil inlet of the blank holding cylinder 1 5 through the solenoid valves Y1 and Y2, and the oil outlet of the servo pump 1 1.1 is communicated with the oil inlet of the blank holding cylinder 2 6 through the solenoid valves Y1 and Y2; the oil outlet of the servo pump 2 1.2 is communicated with the oil inlet of the blank holding cylinder 1 5 through the solenoid valves Y3 and Y4, the oil outlet of the servo pump 2 1.2 is communicated with the oil inlet of the blank holding cylinder 2 6 through the solenoid valves Y3 and Y4, and the oil outlet of the copper wire servo pump 2 1.2 is communicated with the oil inlet of the forming main cylinder 3 through the solenoid valves Y1, Y2, Y3 and Y4.

[0026] In the single-action mode, servo pump 1.1 and servo pump 1.2 are started, solenoid valves Y1 and Y2 are cut off, and Y3 and Y4 are turned on, so that servo pump 1.1 controls the movement of the forming main cylinder 3, and servo pump 1.2 controls the movement of the blank-holding cylinder 1 5 and the blank-holding cylinder 2 6; in the double-action mode, servo pump 1.1 is started, solenoid valves Y1 and Y2 are turned on, and Y3 and Y4 are cut off, and servo pump 1.1 controls the blank-holding cylinder 1 5, the blank-holding cylinder 2 6 and the forming main cylinder 3 to move simultaneously; therefore, in the single-action mode, when applying a compressive force to the workpiece, only the blank-holding cylinder 1 5 and the blank-holding cylinder 2 6 can apply the compressive force, while in the double-action mode, when applying a compressive force to the workpiece, the blank-holding cylinder 1 5, the blank-holding cylinder 2 6 and the forming main cylinder 3 can apply the compressive force simultaneously.

[0027] Servo pump 1.1, servo pump 1.2, forming main cylinder 3, main cylinder force sensor 4, blank-holding cylinder 1 5, blank-holding cylinder 2 6, blank-holding force sensor 7, solenoid valve Y1, solenoid valve Y2, solenoid valve Y3 and solenoid valve Y4 are communicatively coupled to the control panel.

[0028] The control panel contains a PLC controller, and the PLC controller is a programmable numerical control system. As the central control system, the PLC uses a touch screen to realize the program input and operation control of the whole machine, and realizes the full automation of the transportation process. The control system can be used as a system that connects each actuator to move according to a logical track, and controls the actuator to run according to the required operation steps through programming.

[0029] The working principle of the present utility model is as follows:

[0030] First, the mechanical properties and strength of the specimen are tested under normal conditions. In the initial state, the device is in the single-action mode. Servo pump 1.1 controls the forming main cylinder 3 to apply the forming force, and at the same time, the main cylinder force sensor 4 realizes the force closed-loop control of the forming force test. Servo pump 1.2 controls the blank-holding cylinder 1 5 and the blank-holding cylinder 2 6 to apply the blank-holding force, and at the same time, the blank-holding force sensor 7 realizes the force closed-loop control of the blank-holding force test. When performing the compression force test, the operator removes the blank-holding tooling 10, and at the same time, servo pump 1.2 controls the blank-holding cylinder 1 5 and the blank-holding cylinder 2 6 to apply the compression force, and the blank-holding force sensor 7 realizes the force closed-loop control of the compression force test; when the operator needs to increase the compression force, only the single-action mode needs to be converted to the double-action mode. At this time, servo pump 1.2 controls the forming main cylinder 3, the blank-holding cylinder 1 5 and the blank-holding cylinder 2 6 to apply the compression force simultaneously, thereby increasing the range of the testable compression force. At this time, the blank-holding force sensor 7 and the main cylinder force sensor 4 realize the force closed-loop control of the compression force test.

[0031] When performing mechanical property and strength tests on the specimen under ultra-low temperature environment, the staff pours liquid nitrogen onto the specimen 9 through the conical hole of the upper crossbeam 11 to form a low-temperature environment, and then repeats the operations under normal environment to conduct tests on blank holding force, forming force and compressive force.

[0032] The design of this device can conduct tests on blank holding force, forming force and compressive force of the specimen 9 under normal environment and ultra-low temperature environment respectively.

[0033] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A cryogenic servo press, comprising a frame, a servo pump control system installed in the frame, It is characterized in that Also includes Molded master cylinder, installed in the frame; The molding tool is installed on the molding main oil cylinder; The main oil cylinder force sensor is installed between the molding main oil cylinder and the molding tooling; The first edge holding cylinder and the second edge holding cylinder are respectively located outside the two sides of the forming main cylinder and installed in the frame; A movable beam is installed on the first edge pressing cylinder and the second edge pressing cylinder; The blank holding force sensors are respectively installed between the moving beam and the first and second blank holding cylinders; The blank holding fixture is installed on the upper crossbeam in the frame, and the specimen is placed between the forming fixture and the blank holding fixture.

2. The ultra-low temperature servo press according to claim 1, characterized in that: The servo pump control system includes a servo pump 1 and a servo pump 2.

3. The ultra-low temperature servo press according to claim 2, characterized in that: The oil outlet of servo pump one is connected with the oil inlet of the forming main cylinder, and the oil outlet of servo pump one is connected with the oil inlet of the edge pressing cylinder one through solenoid valve Y1 and solenoid valve Y2, and the oil outlet of servo pump one is connected with the oil inlet of the edge pressing cylinder two through solenoid valve Y1 and solenoid valve Y2; the oil outlet of servo pump two is connected with the oil inlet of the edge pressing cylinder one through solenoid valve Y3 and solenoid valve Y4, and the oil outlet of servo pump two is connected with the oil inlet of the edge pressing cylinder two through solenoid valve Y3 and solenoid valve Y4, and the oil outlet of copper wire servo pump two is connected with the oil inlet of the forming main cylinder through solenoid valve Y1, solenoid valve Y2, solenoid valve Y3 and solenoid valve Y4.

4. A cryogenic servo press according to any one of claims 1 to 3, characterized in that: The upper crossbeam is provided with a tapered hole.

5. The ultra-low temperature servo press according to claim 4, characterized in that: The edge pressing tool is provided with a through hole.

6. The ultra-low temperature servo press according to claim 1, characterized in that: A displacement sensor is also provided in the moving beam.

7. The ultra-low temperature servo press according to claim 1 or 6, characterized in that: A displacement sensor is also provided in the molding tool.

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