CN-121977866-A - Windshield low-temperature deformation test device and method thereof

CN121977866ACN 121977866 ACN121977866 ACN 121977866ACN-121977866-A

Abstract

A windshield low-temperature deformation test device and a method thereof relate to the technical field of low-temperature deformation test tools. The low-temperature deformation test device for the windshield comprises a placing frame, a driving system, a deformation acquisition system and a temperature test box, wherein the placing frame, the driving system and the deformation acquisition system are all arranged in the temperature test box, the placing frame is configured to be in supporting connection with a windshield sample, the driving end of the driving system is connected with an abutting piece, the driving system is configured to drive the abutting piece to move towards the placing frame so as to squeeze the windshield sample, the deformation acquisition system is configured to detect deformation values of the windshield sample, and the temperature in the temperature test box is adjustable. The windshield low-temperature deformation test method is suitable for a windshield low-temperature deformation test device. The invention aims to provide a low-temperature deformation test device and a method thereof for a windshield, which are used for simulating low-temperature extrusion of the windshield, so as to test rebound height changes of the windshield after different compression quantities are released.

Inventors

TAN WENCAI
SUI HONGYANG
YU HUILONG
WANG JIAN

Assignees

中车长春轨道客车股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260408

Claims (10)

1. The windshield low-temperature deformation test device is characterized by comprising a placing frame, a driving system, a deformation acquisition system and a temperature test box, wherein the placing frame, the driving system and the deformation acquisition system are all arranged in the temperature test box; The driving end of the driving system is connected with an abutting piece, and the driving system is configured to drive the abutting piece to move towards the placing frame so as to squeeze the windshield sample piece; The deformation acquisition system is configured to detect deformation values of the windshield sample; the temperature inside the temperature test chamber is adjustable.
2. The windshield low temperature deformation test apparatus according to claim 1 wherein a top surface of the placement frame is provided with a positioning groove for accommodating an end of the windshield sample; the fixing structure for fixing the windshield sample piece is arranged on the placing frame; The position of the fixing structure corresponds to the position of the positioning groove.
3. The windshield low temperature deformation test apparatus according to claim 2, wherein the positioning groove is L-shaped or U-shaped; the number of the positioning grooves is two, and the two positioning grooves are configured to be matched with the bottoms of the two windshield samples respectively; the fixing structure comprises a clamping piece and/or a clamping piece, wherein the clamping piece is configured to be clamped at a position, close to the bottom of the windshield sample, and the clamping piece is configured to clamp a position, close to the bottom of the sample, of the windshield sample.
4. The windshield low-temperature deformation test device according to claim 1, further comprising a control device, wherein the temperature test chamber, the driving system and the deformation acquisition system are respectively and electrically connected with the control device; The control device is configured to control the temperature in the temperature test chamber or the control device is configured to control the temperature and the humidity in the temperature test chamber; the control device is configured to control the start and stop of the driving system, the driving speed and the displacement value of the abutting piece; And the deformation value detected by the deformation acquisition system is sent to the control device.
5. The windshield low-temperature deformation test device according to claim 4, wherein an in-place sensor is fixedly arranged in the temperature test box and is configured to detect whether the movement position of the abutting piece is in place or not; The in-place sensor comprises a home sensor electrically connected with the control device, wherein the home sensor is configured to detect whether the abutting piece returns to the original position; the in-place sensor further comprises an end point sensor electrically connected with the control device, wherein the end point sensor is configured to detect whether the abutting piece reaches an end point or not; The origin sensor is located above the end point sensor.
6. The windshield low temperature deformation test apparatus according to claim 5 wherein the in-situ sensor is one or more of a proximity-type induction sensor, a photoelectric switch, and a micro switch; the end point sensor is one or more of a proximity type induction sensor, a photoelectric switch and a micro switch; the number of the origin sensors is one or more; The number of the endpoint sensors is one or more; One end or two ends of the abutting piece are provided with trigger rods which are abutted against the original point sensor and the end point sensor.
7. The windshield low-temperature deformation test device according to claim 4, wherein the driving system adopts a numerical control driving system, and the numerical control driving system is provided with a man-machine interaction unit and a driving execution unit, wherein the driving execution unit is connected with the abutting piece; The man-machine interaction unit is used for inputting a target compression displacement value and sending the target compression displacement value to the control device, and the control device correspondingly controls the driving execution unit so that the driving execution unit drives the abutting piece to move the target compression displacement value, and therefore the windshield sample piece is extruded until the deformation value reaches the target compression displacement value; the driving execution unit adopts one of hydraulic driving, electric driving or pneumatic driving and is used for realizing reciprocating linear motion along a single direction.
8. The windshield low-temperature deformation test device according to claim 4, wherein the inner wall of the temperature test chamber is made of stainless steel; The inner wall of the box body of the temperature test box is coated with a high-performance heat-insulating material; a forced air circulation system and temperature changing equipment are arranged in the temperature test box, and are respectively and electrically connected with the control device; The temperature changing equipment comprises a compressor refrigerating system and an electric heater system, wherein the compressor refrigerating system and the electric heater system are respectively and electrically connected with the control device; The temperature sensors are configured to detect the temperature in the temperature test box and send temperature information to the control device, the humidity sensors are configured to detect the humidity in the temperature test box and send humidity information to the control device, and the control device receives the temperature information and the humidity information and correspondingly controls the start and stop of the forced air circulation system, the compressor refrigerating system and the electric heater system respectively; the adjustable temperature in the temperature test chamber is between 50 degrees below zero and 50 degrees.
9. The windshield low temperature deformation test apparatus of claim 1 wherein the deformation acquisition system comprises a displacement sensor for abutting against the windshield sample top inner wall; The displacement sensor comprises a proximity induction sensor and/or a laser displacement sensor; the displacement sensor is fixedly connected to the placing frame; the abutting piece is a plate-shaped or arched cylinder.
10. A method of testing low temperature deformation of a windshield, suitable for use in a device according to any one of claims 1 to 9, the method comprising: the opposite bottom ends of the windshield sample pieces are placed in the positioning grooves of the placing frames, and the fixing structures of the placing frames fix the bottoms of the windshield sample pieces; The driving system drives the abutting piece to abut against the opposite top end of the windshield sample piece, and a trigger rod on the windshield sample piece abuts against and triggers the original point sensor; The driving system drives the abutting piece to press the windshield sample piece until the triggering rod of the windshield sample piece abuts against and triggers the end point sensor, wherein the end point sensor is arranged at a preset height position; after the preset time, the driving system drives the abutting piece to reset, the windshield sample piece resets and rebounds, and the triggering rod of the windshield sample piece abuts against and triggers the original point sensor; the deformation acquisition system monitors and acquires the displacement change of the height value of the top of the windshield sample piece and stores the displacement change into the memory.

Description

Windshield low-temperature deformation test device and method thereof Technical Field The invention relates to the technical field of low-temperature deformation test tools, in particular to a windshield low-temperature deformation test device and a windshield low-temperature deformation test method. Background A compression type outer windshield used on a rail transit motor train unit vehicle is one of windshield components arranged at the end part of the motor train unit vehicle body and is used for reducing the running noise of the vehicle and reducing the aerodynamic resistance generated during high-speed running. The windshield can highly reduce under low temperature extrusion, if windshield resilience is not enough, can not in time resume to the design height, produces the gap easily between the structure, and then leads to the train windage to increase. In order to grasp the change rule of rebound height of the windshield after different compression amounts are released, support is provided for the improvement of the design of the windshield, and the windshield needs to be tested. Currently, there is no test apparatus for windshields in low temperature environments. Disclosure of Invention The invention aims to provide a low-temperature deformation test device and a method thereof for a windshield, which are used for simulating low-temperature extrusion of the windshield, so as to test rebound height changes of the windshield after different compression quantities are released. In order to achieve the above object, the present invention provides the following technical solutions: The windshield low-temperature deformation test device comprises a placing frame, a driving system, a deformation acquisition system and a temperature test box, wherein the placing frame, the driving system and the deformation acquisition system are all arranged in the temperature test box; The driving end of the driving system is connected with an abutting piece, and the driving system is configured to drive the abutting piece to move towards the placing frame so as to squeeze the windshield sample piece; The deformation acquisition system is configured to detect deformation values of the windshield sample; the temperature inside the temperature test chamber is adjustable. In one possible embodiment, the top surface of the rack is provided with a positioning groove for receiving the end of the windshield sample; the fixing structure for fixing the windshield sample piece is arranged on the placing frame; The position of the fixing structure corresponds to the position of the positioning groove. In one possible implementation manner, the positioning groove is L-shaped or U-shaped; the number of the positioning grooves is two, and the two positioning grooves are configured to be matched with the bottoms of the two windshield samples respectively; the fixing structure comprises a clamping piece and/or a clamping piece, wherein the clamping piece is configured to be clamped at a position, close to the bottom of the windshield sample, and the clamping piece is configured to clamp a position, close to the bottom of the sample, of the windshield sample. In one possible implementation mode, the windshield low-temperature deformation test device further comprises a control device, wherein the temperature test box, the driving system and the deformation acquisition system are respectively and electrically connected with the control device; The control device is configured to control the temperature in the temperature test chamber or the control device is configured to control the temperature and the humidity in the temperature test chamber; the control device is configured to control the start and stop of the driving system, the driving speed and the displacement value of the abutting piece; And the deformation value detected by the deformation acquisition system is sent to the control device. In one possible implementation mode, an in-place sensor is fixedly arranged in the temperature test box and is configured to detect whether the movement position of the abutting piece is in place or not; The in-place sensor comprises a home sensor electrically connected with the control device, wherein the home sensor is configured to detect whether the abutting piece returns to the original position; the in-place sensor further comprises an end point sensor electrically connected with the control device, wherein the end point sensor is configured to detect whether the abutting piece reaches an end point or not; The origin sensor is located above the end point sensor. In one possible embodiment, the in-situ sensor is one or more of a proximity-sensing sensor, a photoelectric switch, and a micro switch; the end point sensor is one or more of a proximity type induction sensor, a photoelectric switch and a micro switch; the number of the origin sensors is one or more; The number of the endpoint sensors is one or more; One end or two ends of the ab