Improved electro-hydraulic servo press

Abstract

The utility model relates to the technical field of compression testing machines, and discloses an improved electro-hydraulic servo press which comprises a rack, and an upper pressing table and a lower pressing table which are arranged up and down are arranged in the rack; the upper pressing table is provided with an electric driving mechanism for driving the upper pressing table to move up and down; the lower pressing table is fixed to the upper end of the supporting piston, the lower end of the supporting piston is inserted into a cylinder hole of the cylinder body in a sleeved mode, and the cylinder body is fixed to the rack. The bottom of the cylinder body is connected with a hydraulic pipe which is connected with a hydraulic station, and the hydraulic station is controlled by a controller. A pressure detection hole communicated with the cylinder hole is formed in the bottom of the cylinder body and connected with a hydraulic sensor. The hydraulic sensor is electrically connected with a controller, the controller controls the electric driving mechanism, and the controller is electrically connected with a control display screen or a displayer. And the upper pressing table is driven by the motor to quickly lift, so that the pressure test efficiency can be effectively improved, and the working intensity of workers is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure testing machines, in particular to an improved electro-hydraulic servo press. Background Art

[0002] An electro-hydraulic servo pressure testing machine is a device used to test the compressive properties of various materials. It primarily measures the critical pressure by driving a press plate to crush the specimen on it. Existing electro-hydraulic servo presses consist of an upper platen and a lower platen. The lower platen is driven by a hydraulic cylinder, while the upper platen is manually raised and lowered. Specifically, the upper platen is fixed to the bottom of a screw, which is threaded onto a drive nut. The screw is raised and lowered by manual direct or indirect rotation of the drive nut. While the upper platen is raised and lowered by the screw, manually raising and lowering the screw plate results in slower speeds and increased workload. Utility Model Content

[0003] The purpose of the utility model is to provide an improved electro-hydraulic servo press, in which the upper press table is driven by a motor to quickly rise and fall, which can effectively improve the efficiency of the pressure test and reduce the work intensity of workers.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions:

[0005] An improved electro-hydraulic servo press comprises a frame, wherein an upper pressing platform and a lower pressing platform are arranged in the frame; the upper pressing platform is provided with an electric drive mechanism for driving it to move up and down; the lower pressing platform is fixed to the upper end of a supporting piston, the lower end of the supporting piston is inserted into the cylinder hole of a cylinder body, and the cylinder body is fixed to the frame; a hydraulic pipe is connected to the bottom of the cylinder body, and the hydraulic pipe is connected to a hydraulic station, and the hydraulic station is controlled by a controller;

[0006] The bottom of the cylinder body is provided with a pressure detection hole connected to the cylinder hole, and the pressure detection hole is connected to a hydraulic sensor. The hydraulic sensor is electrically connected to a controller, which controls the electric drive mechanism and is electrically connected to a control display screen or display.

[0007] Through the above technical solution, the workpiece that needs to be pressure tested is placed on the lower press table, and then the controller controls the electric drive mechanism to drive the lower press table to move down a certain distance. The controller controls the hydraulic station to work, and the hydraulic oil is pumped into the cylinder hole of the cylinder body through the hydraulic pipe. Then the hydraulic oil pushes the support piston upward, and the support piston drives the workpiece upward through the lower press table so that the workpiece is clamped between the upper and lower press tables. The hydraulic oil pressure in the cylinder body can be detected by the hydraulic sensor, thereby indirectly obtaining the pressure on the workpiece. The hydraulic sensor transmits the signal to the controller, and the controller can display the corresponding parameters by operating the display screen or monitor.

[0008] The utility model is further configured as follows: the electric drive mechanism includes a press platform base fixedly connected to the upper press platform, the press platform base is fixed to the bottom of the lifting screw, the lifting screw is screwed into the threaded drive sleeve, and the threaded drive sleeve is rotatably connected to the frame;

[0009] A large sprocket coaxially arranged with the threaded drive sleeve is fixed to the lower end of the threaded drive sleeve, the large sprocket is connected to a small sprocket via a chain, and the small sprocket is fixed to the motor shaft of the servo motor; the servo motor is fixed to the frame, and the servo motor is electrically connected to the controller;

[0010] The upper end of the lifting screw is provided with a guide support assembly.

[0011] Through the above technical solution, the servo motor drives the small sprocket to rotate, the small sprocket drives the large sprocket to rotate through the chain, the large sprocket drives the threaded drive sleeve to rotate, and the threaded drive sleeve rotates to drive the lifting screw to move up or down, thereby realizing the upward or downward movement of the upper press table; the downward movement amplitude of the lifting screw can be accurately controlled by the servo motor.

[0012] The utility model is further configured as follows: a rectangular guide groove is formed on one side outer wall of the lifting screw;

[0013] The guide support assembly includes a guide base inserted into the lifting screw, a rectangular slot is formed on the inner wall of the guide base, a rectangular guide block is fixed in the rectangular slot, the rectangular guide block is inserted into the rectangular guide slot, and the guide base is fixed on the frame.

[0014] Through the above technical solution, when the threaded drive sleeve rotates, the lifting screw can achieve axial movement of the lifting screw through the cooperation of the rectangular guide block and the rectangular guide groove.

[0015] The utility model is further configured as follows: the upper end of the frame is formed with a stepped through hole with a larger upper portion and a smaller lower portion;

[0016] The outer wall of the threaded drive sleeve is in the shape of a stepped column with a small top and a large bottom, and the threaded drive sleeve is inserted into the stepped through hole;

[0017] The lower step surface of the threaded drive sleeve is pressed against the lower end surface of the step through hole, and the upper end of the threaded drive sleeve is rotatably connected to the upper end large hole of the step through hole through a bearing;

[0018] A support ring is movably clamped between the upper end of the threaded drive sleeve and the guide base.

[0019] During the pressure test, the upper pressure table is subjected to an upward reaction force, so the threaded drive sleeve is also subjected to an upward reaction force. The reaction force can be transmitted to the frame through the lower step surface, so that it can be effectively supported;

[0020] The guide base can also provide a supporting force to the threaded drive sleeve through the support ring, and the support ring limits the position of the bearing.

[0021] The utility model is further configured as follows: a bolt hole is formed on one side wall of the rectangular slot, a screw is sleeved in the bolt hole, and the screw is threadedly connected to the rectangular guide block.

[0022] Through the above technical solution, the rectangular guide block can be fastened by screws to prevent it from falling out of the rectangular slot and failing to play a guiding role.

[0023] The utility model is further configured as follows: a grease groove is formed on the upper end surface of the support ring, and the grease groove is filled with grease to reduce the friction between the support ring and the guide base during relative rotation.

[0024] The outstanding effects of the utility model are:

[0025] Compared with the existing technology, the upper pressure platform is driven by a motor to quickly rise and fall, which can effectively improve the efficiency of pressure testing and reduce the workload of workers;

[0026] By using a servo motor as the motor, the lifting range of the upper pressing platform can be accurately controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of the utility model;

[0028] Figure 2 for Figure 1 About the cross-sectional view of AA;

[0029] Figure 3 for Figure 1 A partial enlarged view of B.

[0030] Reference numerals: 10, frame; 101, stepped through hole; 11, upper pressing platform; 12, lower pressing platform; 13, supporting piston; 14, cylinder; 141, pressure detection hole; 15, hydraulic pressure sensor;

[0031] 20. Electric drive mechanism; 201. Pressing platform base; 202. Lifting screw; 203. Threaded drive sleeve; 204. Large sprocket; 205. Chain; 206. Small sprocket; 207. Servo motor; 208. Rectangular guide groove; 209. Guide base; 210. Rectangular slot; 211. Rectangular guide block; 212. Bearing; 213. Support ring; 214. Bolt hole; 215. Screw; 216. Grease groove. DETAILED DESCRIPTION

[0032] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0033] The following references Figures 1 to 3 The utility model is described as follows:

[0034] An improved electro-hydraulic servo press includes a frame 10, within which an upper pressing platform 11 and a lower pressing platform 12 are disposed vertically. The upper pressing platform 11 is provided with an electric drive mechanism 20 for driving the upper pressing platform 11 to move up and down. The lower pressing platform 12 is fixed to the upper end of a support piston 13, the lower end of which is inserted into the cylinder hole of a cylinder body 14, which is fixed to the frame 10. A hydraulic pipe is connected to the bottom of the cylinder body, which is connected to a hydraulic station, which is controlled by a controller.

[0035] The bottom of the cylinder body 14 is provided with a pressure detection hole 141 connected to the cylinder hole, and the pressure detection hole 141 is connected to a hydraulic pressure sensor 15. The hydraulic pressure sensor is electrically connected to a controller, which controls the electric drive mechanism and is electrically connected to a control display screen or display.

[0036] The workpiece that needs to be pressure tested is placed on the lower press table, and then the controller controls the electric drive mechanism to drive the lower press table to move down a certain distance. The controller controls the hydraulic station to work, and pumps hydraulic oil into the cylinder hole of the cylinder body through the hydraulic pipe. Then the hydraulic oil pushes the support piston upward, and the support piston drives the workpiece upward through the lower press table so that the workpiece is clamped between the upper and lower press tables. The hydraulic oil pressure in the cylinder body can be detected by the hydraulic sensor, thereby indirectly obtaining the pressure on the workpiece. The hydraulic sensor transmits the signal to the controller, and the controller can display the corresponding parameters through the control display screen or display.

[0037] The electric drive mechanism 20 includes a press platform base 201 fixedly connected to the upper press platform 11, the press platform base 201 is fixed to the bottom of the lifting screw 202, the lifting screw 202 is screwed into the threaded drive sleeve 203, and the threaded drive sleeve 203 is rotatably connected to the frame 10;

[0038] A large sprocket 204 coaxially arranged with the threaded drive sleeve 203 is fixed to the lower end thereof, and the large sprocket 204 is connected to a small sprocket 206 via a chain 205, and the small sprocket 206 is fixed to the motor shaft of a servo motor 207; the servo motor 207 is fixed to the frame, and the servo motor is electrically connected to the controller;

[0039] A guide support assembly is provided at the upper end of the lifting screw 202 .

[0040] The servo motor drives the small sprocket to rotate, and the small sprocket drives the large sprocket to rotate through the chain. The large sprocket drives the threaded drive sleeve to rotate. The rotation of the threaded drive sleeve drives the lifting screw to move up or down, thereby realizing the upward or downward movement of the upper press table; the downward movement amplitude of the lifting screw can be accurately controlled by the servo motor.

[0041] A rectangular guide groove 208 is formed on one side outer wall of the lifting screw 202;

[0042] The guide support assembly includes a guide base 209 inserted into the lifting screw 202, and a rectangular slot 210 is formed on the inner wall of the guide base 209. A rectangular guide block 211 is fixed in the rectangular slot 210, and the rectangular guide block 211 is inserted into the rectangular guide groove 208. The guide base 209 is fixed on the frame.

[0043] Through the above technical solution, when the threaded drive sleeve rotates, the lifting screw can achieve axial movement of the lifting screw through the cooperation of the rectangular guide block and the rectangular guide groove.

[0044] The upper end of the frame 10 is formed with a stepped through hole 101 with a larger upper portion and a smaller lower portion;

[0045] The outer wall of the threaded driving sleeve 203 is in the shape of a stepped column with a small top and a large bottom. The threaded driving sleeve 203 is inserted into the stepped through hole 101.

[0046] The lower step surface of the threaded driving sleeve 203 is pressed against the lower end surface of the stepped through hole 101, and the upper end of the threaded driving sleeve 203 is rotatably connected to the upper end large hole of the stepped through hole 101 through the bearing 212;

[0047] A support ring 213 is movably clamped between the upper end of the threaded drive sleeve 203 and the guide base 209 .

[0048] During the pressure test, the upper pressure table is subjected to an upward reaction force, so the threaded drive sleeve is also subjected to an upward reaction force. The reaction force can be transmitted to the frame through the lower step surface, so that it can be effectively supported;

[0049] The guide base can also provide a supporting force to the threaded drive sleeve through the support ring, and the support ring limits the position of the bearing.

[0050] A bolt hole 214 is formed on one side wall of the rectangular slot 210 . A screw 215 is sleeved in the bolt hole 214 , and the screw is screwed onto the rectangular guide block 211 .

[0051] The rectangular guide block can be fastened by screws to prevent it from falling out of the rectangular slot and failing to play a guiding role.

[0052] A grease groove 216 is formed on the upper end surface of the support ring 213. The grease groove is filled with grease to reduce the friction between the support ring and the guide base during relative rotation.

[0053] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications based on the above assumptions should also be regarded as within the scope of protection of the present invention.

Claims

1. An improved electro-hydraulic servo press, comprising a frame (10), characterized in that: An upper pressing platform (11) and a lower pressing platform (12) are provided in the frame (10); the upper pressing platform (11) is provided with an electric drive mechanism (20) for driving it to move up and down; the lower pressing platform (12) is fixed to the upper end of the supporting piston (13), the lower end of the supporting piston (13) is inserted into the cylinder hole of the cylinder body (14), and the cylinder body (14) is fixed to the frame (10); The bottom of the cylinder body (14) is provided with a pressure detection hole (141) which is in communication with the cylinder hole, and the pressure detection hole (141) is connected to a hydraulic pressure sensor (15).

2. An improved electro-hydraulic servo press according to claim 1, characterized in that: The electric drive mechanism (20) includes a press platform base (201) fixedly connected to the upper press platform (11), the press platform base (201) is fixed to the bottom of the lifting screw (202), the lifting screw (202) is screwed into the threaded drive sleeve (203), and the threaded drive sleeve (203) is rotatably connected to the frame (10); A large sprocket (204) coaxially arranged therewith is fixed to the lower end of the threaded drive sleeve (203); the large sprocket (204) is connected to a small sprocket (206) via a chain (205); the small sprocket (206) is fixed to the motor shaft of the servo motor (207); and a guide support assembly is provided at the upper end of the lifting screw (202).

3. The improved electro-hydraulic servo press according to claim 2, characterized in that: A rectangular guide groove (208) is formed on one side outer wall of the lifting screw (202); The guide support assembly comprises a guide base (209) inserted into the lifting screw (202), a rectangular slot (210) is formed on the inner wall of the guide base (209), a rectangular guide block (211) is fixed in the rectangular slot (210), and the rectangular guide block (211) is inserted into the rectangular guide groove (208). The guide base (209) is fixed on the frame.

4. The improved electro-hydraulic servo press according to claim 3, characterized in that: The upper end of the frame (10) is formed with a stepped through hole (101) that is larger at the top and smaller at the bottom; The outer wall of the threaded drive sleeve (203) is in the shape of a stepped column with a smaller top and a larger bottom, and the threaded drive sleeve (203) is inserted into the stepped through hole (101); The lower step surface of the threaded drive sleeve (203) is pressed against the lower end surface of the step through hole (101), and the upper end of the threaded drive sleeve (203) is rotatably connected to the upper end large hole of the step through hole (101) via a bearing (212); A support ring (213) is movably clamped between the upper end of the threaded drive sleeve (203) and the guide base (209).

5. The improved electro-hydraulic servo press according to claim 3, characterized in that: A bolt hole (214) is formed on one side wall of the rectangular slot (210), a screw (215) is sleeved in the bolt hole (214), and the screw is screwed onto the rectangular guide block (211).

6. The improved electro-hydraulic servo press according to claim 4, characterized in that: A grease groove (216) is formed on the upper end surface of the support ring (213).

Images