Five-station uniform-temperature 4T high-speed compressive strain testing machine

Abstract

The invention relates to a five-station uniform-temperature 4T high-speed compressive strain testing machine, which comprises a constant-temperature furnace and a servo press, the lower part of the servo press extends into the constant-temperature furnace, the servo press comprises a screw rod and a driving mechanism for driving the screw rod to move up and down, the lower end of the screw rod is provided with a pressure head, and one or more groups of heat insulation assemblies are arranged above the pressure head; the constant-temperature furnace comprises a pedestal and a furnace body installed on the pedestal, a plurality of furnace pipes are evenly distributed in an inner cavity of the furnace body, a heating coil is embedded in each furnace pipe, and a pressing seat corresponding to the pressing head in position is fixedly arranged in each furnace pipe. The five internal furnaces are heated independently, the temperature control precision of each sample point is guaranteed, meanwhile, holes are formed in the two sides of the internal furnaces, uniform temperature is formed through air circulation, a five-station uniform temperature field environment is formed, a heat insulation assembly is arranged, 500-degree high temperature in the constant-temperature furnace is prevented from being transmitted to a driving mechanism, meanwhile, a water flow channel is arranged, a pressure head is cooled through cooling water, and the temperature control precision of each sample point is guaranteed. High-temperature heat insulation is realized.

Description

Technical Field

[0001] This invention relates to the field of uniform temperature compressive strain testing machines, and more particularly to a five-station uniform temperature 4T high-speed compressive strain testing machine. Background Technology

[0002] Strain testing machines are primarily used to measure the compressive strength and strain-pressure relationship of different materials in a hot state. In existing technology, hot-state pressure testing machines are generally modified from room-temperature pressure testing machines. A heating system (heating element) heats the furnace to the required temperature, a pressurization system applies the required pressure to the sample, and a pressure sensor detects the pressure value. However, in a hot state, only the compressive strength of a single sample can be measured. If multiple stations are set up, temperature differences can easily exist between them, leading to experimental errors. Furthermore, existing strain testing machines cannot perform high-speed compression changes (100 mm / s) and rapid stops; heat insulation between the heating device and the strain testing machine is also a problem that needs to be solved. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, a five-station uniform temperature 4T high-speed compressive strain gauge is proposed to solve the problems mentioned in the background technology.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: A five-station uniform temperature 4T high-speed compressive strain testing machine includes a constant temperature furnace and a servo press. The lower part of the servo press extends into the constant temperature furnace. The servo press includes a lead screw and a drive mechanism for driving the lead screw to move up and down. A pressure head is provided at the lower end of the lead screw, and one or more sets of heat insulation components are provided above the pressure head. The constant temperature furnace includes a base and a furnace body mounted on the base. Multiple furnace chambers are evenly distributed inside the furnace body. A heating coil is embedded in each furnace chamber. A pressure seat corresponding to the position of the pressure head is fixedly installed inside the furnace chamber.

[0005] As a further technical solution of the present invention: the driving mechanism includes a servo motor, the servo motor is mounted on a motor base, an upper base is fixedly connected below the motor base, a small pulley is connected to the output end of the servo motor, a large pulley is arranged above the upper base, the large pulley is located on one side of the small pulley, the large pulley and the small pulley are connected by a synchronous belt, the large pulley is mounted on a rotating sleeve and drives the rotating sleeve to rotate, a lead screw nut is fixedly installed inside the rotating sleeve, and the lead screw nut is rotatably mounted on the lead screw.

[0006] As a further technical solution of the present invention: a fixing column is provided at each of the four corners of the upper seat, the upper end of the fixing column is fixedly connected to the upper seat, the lower end of the fixing column is fixedly connected to the lower seat, and a fixing column sleeve is provided on the outer wall of the fixing column.

[0007] As a further technical solution of the present invention: the heat insulation component includes a heat insulation sleeve that is wrapped around the outer wall of the lead screw, a connecting sleeve is wrapped around the outer side of the heat insulation sleeve, an upper spacer is provided above the connecting sleeve, a lower spacer is provided below the connecting sleeve, and a connector is provided on the outer side of the connecting sleeve, and the connecting sleeve and the connector are threaded together.

[0008] As a further technical solution of the present invention: a water flow channel is also provided inside the lead screw, and a water flow inlet and a water flow outlet are provided at both the upper and lower ends of the water flow channel.

[0009] As a further technical solution of the present invention: a pressure sensor is provided above the pressure head, and the pressure sensor is fixedly installed on the lead screw.

[0010] As a further technical solution of the present invention: a displacement sensor is provided on one side of the fixed column, the lower end of the displacement sensor is connected to the pull plate, the lower end of the pull plate is connected to the connecting rod, and the connecting rod is connected to the heat insulation component.

[0011] As a further technical solution of the present invention: the upper end of the lead screw is fixedly connected to a limiting plate, the two sides of the limiting plate are installed on limiting posts, an adjusting sleeve is provided below the limiting plate, a fixing sleeve is threadedly connected to the inner cavity of the adjusting sleeve, the fixing sleeve is fixedly installed on the limiting post, and the lower end of the limiting post is fixedly connected to the upper seat.

[0012] As a further technical solution of the present invention: a top cover is provided on the top of the furnace body, the top cover has a through hole for the servo press to pass through, a furnace door is provided on the outside of the furnace body, heat insulation cotton is provided between the furnace liner and the furnace body, a ventilation hole is provided on each furnace liner, and multiple high-temperature resistant fans are provided in the inner cavity of the furnace body, the high-temperature resistant fans are driven to rotate by a fan motor provided outside the furnace body.

[0013] As a further technical solution of the present invention: the pressure head is equipped with a guide sleeve that is compatible with the pressure seat.

[0014] The beneficial effects of this invention are: This invention features a constant-temperature furnace with five furnace chambers, each heated independently. This independent heating and temperature control ensures precise temperature control at each sample point. Additionally, openings on both sides of the furnace chambers allow for uniform temperature distribution through air circulation, creating a five-station uniform temperature environment. Five sets of tests are conducted simultaneously to collect strain data. This unified external condition allows for data comparison, and the consistency of multiple sets of actual data verifies the accuracy of the theoretical data.

[0015] A heat insulation component is installed above the pressure head to prevent the 500°C high temperature inside the constant temperature furnace from being transmitted to the drive mechanism. At the same time, a water flow channel is set up to cool the pressure head with cooling water, achieving high-temperature insulation. This ensures the continuous conduct of the experiment and the accuracy of the test data, and also prevents the equipment from being damaged by high temperature.

[0016] The drive mechanism drives the lead screw to move up and down, enabling the pressure head to move down at a high speed of 100mm / s. At the same time, an adjustment sleeve and a fixing sleeve are set to enable the pressure head to stop quickly. During the downward movement, the pressure head maintains a downward speed of 100mm / s. The pressure head moves down at high speed and directly hits the object to be pressed, ensuring the stability of the experimental data. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a front view of the main structure of the servo press; Figure 3 This is a front view of the main structure of the constant temperature furnace; Figure 4 This is a top-view sectional view of the main structure of the constant temperature furnace; Figure 5 Left view of the main structure of the servo press; Figure 6 This is a cross-sectional view of the main structure of the thermal insulation component; Figure 7 This is a schematic diagram of the main structure of the guide sleeve.

[0018] In the diagram: 1-Constant temperature furnace, 10-Fan motor, 11-Base, 12-Furnace body, 13-Furnace liner, 14-Heating coil, 15-Top cover, 16-Furnace door, 17-Insulation cotton, 18-Ventilation hole, 19-High temperature resistant fan, 2-Servo press, 21-Screw, 22-Press head, 23-Insulation component, 231-Insulation sleeve, 232-Connector, 233-Upper spacer, 234-Lower spacer, 235-Connector, 236-Water flow channel, 237-Water inlet, 238-Water outlet, 241-Servo press 242-Motor base, 243-Small pulley, 244-Large pulley, 245-Synchronous belt, 246-Swivel sleeve, 247-Screw nut, 251-Upper seat, 252-Fixing column, 253-Lower seat, 254-Fixing column sleeve, 255-Limit plate, 256-Limit column, 257-Adjusting sleeve, 258-Fixing sleeve, 26-Pressure sensor, 271-Displacement sensor, 272-Pull plate, 273-Connecting rod, 274-, 28-Pressure seat, 29-Guide sleeve, 4-Heat insulation body. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Reference Figure 1-7A five-station uniform temperature 4T high-speed compressive strain testing machine includes a constant temperature furnace 1 and a servo press 2. The lower part of the servo press 2 extends into the constant temperature furnace 1, and the portion of the servo press 2 extending into the constant temperature furnace 1 is provided with a heat insulation body 4. The constant temperature furnace 1 includes a base 11 and a furnace body 12 mounted on the base 11. A top cover 15 is provided on the top of the furnace body 12, and the top cover 15 has a through hole for the servo press 2 to pass through. Multiple furnace chambers 13 are evenly distributed inside the furnace body 12, with five furnace chambers 13 in total. Each furnace chamber 13 has a heating coil 14 embedded inside, and each furnace chamber 13 is heated independently. Independent heating and temperature control ensure the temperature control accuracy of each furnace chamber 13.

[0021] A heat insulation cotton 17 is provided between the furnace liner 13 and the furnace body 12. A furnace door 16 is provided on the outside of the furnace body 12. There are five furnace doors 16. The position of the furnace doors 16 is adapted to the position of the furnace liner 13. A heat insulation cotton 17 is also provided on the lower end face of the top cover 15.

[0022] Each furnace chamber 13 has four ventilation holes 18. Multiple high-temperature resistant fans 19 are installed inside the furnace body 12. These fans are driven by fan motors 10 located outside the furnace body 12. The air blown out by the high-temperature fans 19 forms a circulating channel between the ventilation holes 18 of the furnace chamber 13, resulting in a uniform temperature environment. If the high-temperature fans 19 are stopped, different independent temperature tests can be performed at the five workstations.

[0023] Five servo presses 2 are provided, and the positions of the servo presses 2 correspond to the positions of the five furnace shells 13. Each servo press 2 includes a lead screw 21 and a drive mechanism for driving the lead screw 21 to move up and down. Four fixed columns 252 are provided on the outside of the lead screw 21. The upper end of the fixed column 252 is fixedly connected to the upper seat 251, and the lower end of the fixed column 252 is fixedly connected to the lower seat 253. A fixed column sleeve 254 is provided on the outer wall of the fixed column 252. The lower part of the fixed column 252 and the lower seat 253 extend into the furnace shell 13.

[0024] A pressure head 22 is provided at the lower end of the lead screw 21. A pressure seat 28 corresponding to the position of the pressure head 22 is fixedly provided inside the furnace liner 13. A block to be pressed is placed on the pressure seat 28. A guide sleeve 29 adapted to the pressure seat 28 is installed on the pressure head 22. The lead screw 21 moves down to drive the pressure head 22 to move down and squeeze the block to be pressed. The guide sleeve 29 prevents the pressure head 22 and the block to be pressed from shifting during the pressing process.

[0025] The drive mechanism includes a servo motor 241, which is mounted on a motor base 242. An upper base 251 is fixedly connected below the motor base 242. A small pulley 243 is connected to the output end of the servo motor 241. A large pulley 244 is positioned above the upper base 251, located to one side of the small pulley 243. The large pulley 244 and the small pulley 245 are connected by a synchronous belt 245. The large pulley 244 is mounted on a rotating sleeve 246 and drives the rotating sleeve 246 to rotate. A lead screw nut 247 is fixedly installed inside the rotating sleeve 246 and rotatably mounted on a lead screw 21. The servo motor 241 drives the small pulley 243 to rotate, which in turn drives the large pulley 244 to rotate via the synchronous belt 245. The rotation of the large pulley 244 drives the rotating sleeve 246 and the lead screw nut 247 to rotate, thus realizing the up-and-down movement of the lead screw 21.

[0026] A limit plate 255 is fixedly connected to the upper end of the lead screw 21. Limit plates 255 are mounted on limit posts 256 on both sides. An adjusting sleeve 257 is provided below the limit plate 255. A fixing sleeve 258 is threadedly connected to the inner cavity of the adjusting sleeve 257. The fixing sleeve 258 is fixedly mounted on the limit post 256. The lower end of the limit post 256 is fixedly connected to the upper seat 251. The up-and-down movement of the lead screw 21 causes the limit plate 255 to move up and down along the limit post 256. When the limit plate 255 contacts the adjusting sleeve 257, the limit plate 255 and the lead screw 21 can no longer move, thus achieving a rapid stop for the lead screw 21 and the pressure head 22.

[0027] One or more sets of heat insulation components 23 are installed above the pressure head 22, as shown in the figure. Figure 6 The heat insulation component 23 includes a heat insulation sleeve 231 that is ringed around the outer wall of the lead screw 21. A connecting sleeve 232 is ringed around the outside of the heat insulation sleeve 231. An upper spacer 233 is provided above the connecting sleeve 232, a lower spacer 234 is provided below the connecting sleeve 232, and a connector 235 is provided on the outside of the connecting sleeve 232. The connecting sleeve 232 and the connector 235 are threaded together. A water flow channel 236 is also provided inside the lead screw 21. Water inlet 237 and water outlet 238 are provided at both the upper and lower ends of the water flow channel 236. Cooling water enters the water flow channel 236 through the water inlet 237 and then flows out through the water outlet 238. The heat insulation component 23 plays a role in heat insulation and cooling, preventing the 500-degree high temperature inside the constant temperature furnace 1 from being transmitted to the drive mechanism and causing damage to the drive mechanism. At the same time, the water flow channel 236 is provided to cool the pressure head 22 through the cooling water.

[0028] A pressure sensor 26 is installed above the pressure head 22 and is fixedly mounted on the lead screw 21. The pressure sensor 26 is integrated in the middle of the lead screw 21 and is used to detect the pressure value of the pressure head 22, eliminating the interference of mechanical transmission on the pressure and ensuring the accuracy of force measurement.

[0029] A displacement sensor 271 is installed on one side of the fixed column 252. The lower end of the displacement sensor 271 is connected to the pull plate 272, and the lower end of the pull plate 272 is connected to the connecting rod 273. The connecting rod 273 is connected to the heat insulation component 23. The displacement sensor 271 is connected to the pull rod 252 through a heat-insulating ceramic pad. The heat-insulating ceramic pad prevents the high temperature inside the furnace from affecting the sensor, prevents temperature drift, and ensures data accuracy.

[0030] Specific embodiments of the present invention: In use, open the five furnace doors 16 respectively, place the material to be pressed on the five pressure seats 28 respectively, the heating coil 14 in the furnace 13 starts to heat, the fan motor 10 drives the high temperature fan 19 to rotate, after the high temperature fan 19 blows out the air, a circulation channel is formed between the ventilation holes 18 of the furnace 13, the temperature is uniform, and a uniform temperature field environment is formed.

[0031] Servo motor 241 drives small pulley 243 to rotate. Small pulley 243 drives large pulley 244 to rotate via synchronous belt 245. The rotation of large pulley 244 drives rotating sleeve 246 and lead screw nut 247 to rotate, thereby moving lead screw 21. When the moving speed of lead screw 21 reaches 100mm / s, lead screw 21 maintains a speed of 100mm / s and moves downward until it moves down to contact limit plate 255 and adjusting sleeve 257. At this point, pressure head 22 directly presses on the object to be pressed, thus achieving a rapid stop of lead screw 21 and pressure head 22.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A five-station uniform temperature 4T high-speed compressive strain testing machine, characterized in that: It includes a constant temperature furnace (1) and multiple servo presses (2). The lower part of the servo presses (2) extends into the constant temperature furnace (1). The servo presses (2) include a lead screw (21) and a drive mechanism for driving the lead screw (21) to move up and down. A pressure head (22) is provided at the lower end of the lead screw (21). One or more sets of heat insulation components (23) are provided above the pressure head (22). The constant temperature furnace (1) includes a base (11) and a furnace body (12) installed on the base (11). Multiple furnace chambers (13) are evenly distributed in the inner cavity of the furnace body (12). A heating coil (14) is embedded in each furnace chamber (13). A pressure seat (28) corresponding to the position of the pressure head (22) is fixedly installed in the furnace chamber (13).

2. The five-station uniform temperature 4T high-speed compressive strain testing machine according to claim 1, characterized in that: The drive mechanism includes a servo motor (241), which is mounted on a motor base (242). An upper base (251) is fixedly connected below the motor base (242). A small pulley (243) is connected to the output end of the servo motor (241). A large pulley (244) is provided above the upper base (251). The large pulley (244) is located on one side of the small pulley (243). The large pulley (244) and the small pulley (245) are connected by a synchronous belt (245). The large pulley (244) is mounted on a rotating sleeve (246) and drives the rotating sleeve (246) to rotate. A lead screw nut (247) is fixedly installed inside the rotating sleeve (246). The lead screw nut (247) is rotatably mounted on the lead screw (21).

3. The five-station uniform temperature 4T high-speed compressive strain testing machine according to claim 2, characterized in that: Fixed posts (252) are provided at the four corners of the upper seat (251). The upper end of the fixed post (252) is fixedly connected to the upper seat (251), and the lower end of the fixed post (252) is fixedly connected to the lower seat (253). A fixed post sleeve (254) is provided on the outer wall of the fixed post (252).

4. The five-station uniform temperature 4T high-speed compressive strain testing machine according to claim 1, characterized in that: The heat insulation component (23) includes a heat insulation sleeve (231) that is wrapped around the outer wall of the lead screw (21). A connecting sleeve (232) is wrapped around the outside of the heat insulation sleeve (231). An upper spacer (233) is provided above the connecting sleeve (232), and a lower spacer (234) is provided below the connecting sleeve (232). A connector (235) is provided on the outside of the connecting sleeve (232). The connecting sleeve (232) and the connector (235) are threaded together.

5. A five-station uniform temperature 4T high-speed compressive strain testing machine according to claim 4, characterized in that: The lead screw (21) is also provided with a water flow channel (236), and the upper and lower ends of the water flow channel (236) are provided with a water flow inlet (237) and a water flow outlet (238).

6. The five-station uniform temperature 4T high-speed compressive strain testing machine according to claim 1, characterized in that: A pressure sensor (26) is provided above the pressure head (22), and the pressure sensor (26) is fixedly installed on the lead screw (21).

7. A five-station uniform temperature 4T high-speed compressive strain testing machine according to claim 3, characterized in that: A displacement sensor (271) is provided on one side of the fixed column (252). The lower end of the displacement sensor (271) is connected to the pull plate (272). The lower end of the pull plate (272) is connected to the connecting rod (273). The connecting rod (273) is connected to the heat insulation component (23).

8. A five-station uniform temperature 4T high-speed compressive strain testing machine according to claim 3, characterized in that: The upper end of the lead screw (21) is fixedly connected to a limiting plate (255). The two sides of the limiting plate (255) are installed on the limiting post (256). An adjusting sleeve (257) is provided below the limiting plate (255). A fixing sleeve (258) is threadedly connected to the inner cavity of the adjusting sleeve (257). The fixing sleeve (258) is fixedly installed on the limiting post (256). The lower end of the limiting post (256) is fixedly connected to the upper seat (251).

9. A five-station uniform temperature 4T high-speed compressive strain testing machine according to claim 3, characterized in that: A top cover (15) is provided on the top of the furnace body (12). The top cover (15) has a through hole for the servo press (2) to pass through. A furnace door (16) is provided on the outside of the furnace body (12). Heat insulation cotton (17) is provided between the furnace liner (13) and the furnace body (12). Each furnace liner (13) has a ventilation hole (18). Multiple high-temperature resistant fans (19) are provided in the inner cavity of the furnace body (12). The high-temperature resistant fans (19) are driven to rotate by a fan motor (10) located outside the furnace body (12).

10. A five-station uniform temperature 4T high-speed compressive strain testing machine according to claim 1, characterized in that: The pressure head (22) is equipped with a guide sleeve (29) that is compatible with the pressure seat (28).

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