CN114894378A

CN114894378A - Extrusion test equipment and extrusion test method

Info

Publication number: CN114894378A
Application number: CN202210444751.7A
Authority: CN
Inventors: 王俊亭
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2022-04-26
Filing date: 2022-04-26
Publication date: 2022-08-12
Anticipated expiration: 2042-04-26
Also published as: CN114894378B

Abstract

The invention discloses extrusion test equipment and an extrusion test method, which belong to the technical field of test devices, and are provided with a plurality of test stations, wherein each test station comprises a test fixture and two cylinders; the test fixture is used for bearing a product to be tested; the two air cylinders are respectively arranged at two opposite sides of the test fixture, and air inlet pipes of the two air cylinders are connected to the same air flow pipeline; the air flow pipeline is used for supplying air to the air inlet pipes of the two cylinders simultaneously so as to control the piston contacts of the two cylinders to be pushed out synchronously, and the opposite ends of a product to be tested on the test fixture are clicked simultaneously to generate extrusion force, so that the requirement of the extrusion test of the product is met. The extrusion testing equipment provided by the invention utilizes the same airflow pipeline to control the two air cylinders to operate, so that the problem that the two air cylinders are asynchronous in action can be avoided, the problems of test errors and poor test stability caused by the asynchronous servo motors in the prior art are solved, the retest rate is reduced, and the testing efficiency is improved.

Description

Extrusion test equipment and extrusion test method

Technical Field

The invention belongs to the technical field of testing devices, and particularly relates to a testing device and an extrusion testing method for carrying out extrusion testing on a product.

Background

With the increasing demand of consumers for convenience in operation of electronic products, some electronic products recognize operation instructions of users by sensing user tapping. For example, in some current wireless headsets, a pressure sensor is configured inside a handle of the wireless headset, and is used for sensing a click action of a user, and identifying an operation instruction of the user according to the number of clicks or the frequency of clicks, so as to control the headset to execute a corresponding function, and implement a response to the operation of the user.

Before the earphone leaves a factory, the performance of a pressure sensor in the earphone needs to be tested. At present, for the pressure sensor inside the earphone, the performance test method mainly adopts an extrusion test method. Namely, the reliability of the pressure sensor is tested by carrying out clicking operation on the position of the earphone handle corresponding to the position of the pressure sensor and acquiring the output value of the pressure sensor.

At present, current earphone extrusion test equipment adopts servo motor to carry out the extrusion test to the product that awaits measuring, and experimental poor stability, the retest rate is high to it is bulky, and the station is small in quantity, is unfavorable for the promotion of efficiency of software testing, waste time and manpower.

The above information disclosed in this background section is only for enhancement of understanding of the background of the application and therefore it may comprise prior art that does not constitute known to a person of ordinary skill in the art.

Disclosure of Invention

The invention designs the extrusion test equipment based on the air cylinders, and uses one air pipe to control the synchronous action of the two air cylinders so as to achieve the purposes of improving the accuracy of the extrusion test operation and reducing the retest rate.

In order to achieve the purpose of the invention, the invention is realized by adopting the following technical scheme:

in one aspect, the invention provides an extrusion test apparatus having a plurality of test stations, each test station including a test fixture and two cylinders; the test fixture is used for bearing a product to be tested; the two air cylinders are respectively arranged at two opposite sides of the test fixture, and air inlet pipes of the two air cylinders are connected to the same air flow pipeline; the air flow pipeline is used for supplying air to the air inlet pipes of the two cylinders simultaneously so as to control the piston contacts of the two cylinders to be pushed out synchronously and extrude the product to be tested on the test fixture.

In some embodiments of the present application, in order to synchronize the piston contacts of the two cylinders during retraction, it is preferable to connect the outlet pipes of the two cylinders to the same return pipe, and the return pipe is used to simultaneously supply air to the outlet pipes of the two cylinders so as to control the piston contacts of the two cylinders to retract synchronously.

In some embodiments of the present application, the air flow line and the air return line may be configured to alternately supply air through a reversing valve, and when one of the air flow line and the air return line is in an air supply state, the other air flow line is communicated with the atmosphere and is in an air exhaust state, so as to control the piston contacts of the two cylinders to reliably extend and retract.

In some embodiments of the present application, a solenoid valve and a pressure regulating valve may be further configured in the test station; the two electromagnetic valves can be configured, wherein one of the two electromagnetic valves is installed on the airflow pipeline and is used for controlling the opening and closing of airflow flowing through the air inlet pipes of the two cylinders; the other air return pipeline is arranged on the air return pipeline and used for controlling the opening and closing of the air flow passing through the air outlet pipes of the two air cylinders, and the two air cylinders can be controlled to work or not through the electromagnetic valve. The pressure regulating valves comprise two pressure regulating valves which are respectively arranged on the air inlet pipes of the two cylinders and used for regulating the air flow size of each cylinder, and then the output intensity of each cylinder is changed, so that the extrusion force applied to the product to be tested can be freely regulated as required, and the extrusion test requirements of different types of products to be tested can be met.

In some embodiments of the present application, a stage and a rotary base may be configured in the test fixture; the carrying platform is provided with a clamp, and the clamp is used for clamping and fixing a product to be detected; the rotating base is arranged below the carrying platform and used for driving the carrying platform to rotate so as to adjust the extrusion position of a product to be tested on the carrying platform and meet the test requirement that some products to be tested need multi-directional extrusion.

In some embodiments of the present application, a stationary base and a turntable may be configured in the rotary base; wherein, a corner dial and a fastening screw can be arranged on the fixed base; the turntable is coaxially and rotatably assembled with the fixed base, and can be fixedly assembled with the fixed base under the fastening action of the fastening screw; the carrying platform is arranged on the turntable, and the extrusion direction of the product to be measured can be visually and accurately adjusted by utilizing the corner dial.

In some embodiments of the present application, to position the cylinder, a post, a bracket, and a spring clip may be configured in the test station; the two upright columns are respectively used for supporting and positioning the two cylinders, and each upright column is provided with a vertical strip-shaped assembling hole; the number of the supports is two, and one cylinder is arranged on each support; the two elastic clips respectively penetrate through the vertical strip-shaped assembling holes in the two upright posts and are correspondingly arranged on the two brackets; the elastic clamp can move up and down along the vertical strip-shaped assembling hole in a pressing state so as to be used for adjusting the up-down position of the air cylinder; the elastic clamp is fastened in the vertical strip-shaped assembly hole in a loose state so as to fix the position of the air cylinder. The cooperation of utilizing elasticity clamping and stand can adjust the spatial position of cylinder, and then changes the extrusion position of the product that awaits measuring.

In some embodiments of this application, in order to prevent that the cylinder from deflecting after working for a period of time, lead to its extrusion point position of using on the product to be measured to appear squinting, can set up location portion on the support, location portion preferred design is rectangular platelike, vertical installation in on the support, and with a vertical surface in the stand outside is laminated mutually, can prevent from this that the support from deflecting in level and vertical direction, and then realizes the firm location of cylinder.

In some embodiments of the present application, a console and a bus bar may be further disposed in the extrusion testing apparatus; the control platform is preferably designed into a box structure, and a plurality of test stations are preferably distributed on the top surface of the box body so as to simultaneously perform extrusion test on a plurality of products to be tested, thereby improving the test efficiency and saving time and labor. The air flow pipeline, the air return pipeline, the electromagnetic valve and the pressure regulating valve can be arranged in the box body, and an operation knob of the pressure regulating valve is preferably arranged on the outer surface of the box body, so that a technician can conveniently regulate the air flow. The two bus plates can be arranged and are arranged in a box body of the console, wherein one bus plate is connected with the airflow pipeline of each testing station and is used for performing centralized air supply and centralized air exhaust control on the airflow pipelines of all the testing stations; and the other collecting plate is connected with the air return pipeline of each testing station and is used for performing centralized air supply and centralized air exhaust control on the air return pipelines of all the testing stations. The piston contact of the cylinder in each test station can be controlled to reliably stretch by the bus board.

In some embodiments of the present application, a signal collector and a main control board may also be configured in the extrusion testing device; the signal collector can be arranged on the console and is used for being electrically connected with a pressure sensor in a product to be tested arranged on the test fixture so as to collect a detection signal output by the pressure sensor; the main control board can be arranged in the box body of the console, is connected with the signal collector, judges the performance of the pressure sensor according to the detection signal output by the pressure sensor, and automatically generates a test result.

In another aspect, the present invention also provides a compression testing method, including:

respectively arranging an air cylinder on two opposite sides of a product to be detected;

adjusting the positions of the two cylinders to enable the piston contacts of the two cylinders to be aligned to the extrusion positions of the product to be detected, wherein the extrusion positions correspond to the positions of the pressure sensors distributed in the product to be detected;

the same airflow pipeline is used for supplying air to the two cylinders simultaneously so as to control the piston contacts of the two cylinders to be pushed out synchronously, and the two cylinders are clicked at the extrusion position of the product to be tested simultaneously to generate extrusion force;

and collecting a detection signal output by a pressure sensor in a product to be detected, and generating an extrusion test result according to the detection signal.

Compared with the prior art, the invention has the advantages and positive effects that: the extrusion test equipment adopts the air cylinder to replace a servo motor in the prior art to carry out extrusion test on a product to be tested, and simultaneously supplies air for the two air cylinders distributed at the two opposite sides of the product to be tested by using the same air flow pipeline, so that piston contacts of the two air cylinders can be controlled to be synchronously pushed out all the time, synchronous clicking on the two opposite ends of the product to be tested is realized, an ideal extrusion effect is achieved, the problems of test errors and poor test stability caused by asynchronous servo motors in the prior art are solved, the retest rate is reduced, and the test efficiency is improved.

Other features and advantages of the present invention will become more apparent from the detailed description of the embodiments of the present invention when taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of one embodiment of a compression testing apparatus according to the present invention;

FIG. 2 is a rear view of one embodiment of the compression testing apparatus shown in FIG. 1;

FIG. 3 is a schematic diagram of one embodiment of one of the test stations of FIG. 1;

FIG. 4 is a schematic view of the test station of FIG. 3 from another perspective;

FIG. 5 is a partially exploded view of the test station shown in FIG. 4;

FIG. 6 is a schematic view of the gas flow when the piston contacts of two cylinders are controlled to be synchronously pushed out;

FIG. 7 is a schematic gas flow diagram illustrating the simultaneous retraction of the piston contacts of two cylinders;

FIG. 8 is a flow chart of one embodiment of a squeeze test method according to the present invention.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

It should be noted that in the description of the present invention, the terms "inside", "outside", "upper", "lower", "top", "bottom", and the like, which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Furthermore, it should be noted that in the description of the present invention, the terms "mounted," "connected," and "connected" are to be construed broadly unless otherwise specifically indicated and limited. For example, it may be a fixed connection, a detachable connection or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

This embodiment adopts two servo motor to carry out extrusion test to the product that awaits measuring to prior art, because of two servo motor after long-time independent operation, the action is difficult to keep synchronous, and then leads to the click frequency at measured product both ends to appear the difference, produces experimental error, influences the problem of test result then, has provided one kind and has utilized cylinder replacement servo motor to carry out the click operation to the product that awaits measuring to reach the test method of extrusion purpose.

Specifically, as shown in fig. 8, the following process is included:

s101, respectively arranging an air cylinder on two opposite sides of a product to be detected;

s102, adjusting the positions of the two cylinders to enable the piston contacts of the two cylinders to be aligned to the extrusion position of the product to be measured;

for a product to be tested with a built-in pressure sensor, the extrusion position corresponds to the position of the product to be tested where the pressure sensor is arranged, namely, clicking operation is carried out on the pressure sensor to test the performance of the pressure sensor;

s103, simultaneously supplying air to the two cylinders by using the same airflow pipeline so as to control the piston contacts of the two cylinders to be synchronously pushed out, and simultaneously clicking at the extrusion position of the product to be tested to generate extrusion force;

because the air supply pipelines of the two cylinders are the same, the extending actions of the piston contacts of the two cylinders can be ensured to be consistent, the piston contacts of the two cylinders are utilized to click the two opposite ends of a tested product at the same time, the extrusion effect can be generated, and the extrusion test requirements are met.

For a product to be detected with a built-in pressure sensor, in order to achieve the purpose of detecting the performance of the built-in pressure sensor of the product to be detected, the following steps can be added:

s104, collecting a detection signal output by a pressure sensor in a product to be detected, and generating an extrusion test result according to the detection signal;

because the output force of the piston contacts of the two cylinders can be measured in advance, the extrusion force generated on the product to be measured can be known in advance. The pressure value of the detection output of the pressure sensor in the product to be detected is collected, and the pressure value is compared with the extrusion force which is known in advance, so that whether the performance of the pressure sensor is excellent or not can be judged.

In order to put the above extrusion testing method into practical use, the present embodiment designs an extrusion testing apparatus, as shown in fig. 1, which includes a console 100, wherein one or more testing stations 200 are configured on a top surface of the console 100, and each testing station 200 is used for performing extrusion testing on a product to be tested. When a plurality of test stations 200 are configured on the top surface of the console 100, each test station 200 can be operated independently. A plurality of test stations 200 are opened, and then a plurality of products to be tested can be extruded and tested at the same time, so that the test efficiency can be improved, and the labor and the time are saved.

In this embodiment, the console 100 may be designed as a box structure, and preferably, the top surface of the box is designed to be flat, so that a plurality of test stations 200 are arranged on the top surface of the box in an array. Fig. 1 shows a case that two rows and four columns of eight test stations 200 are arranged on the top surface of the box body, and the extrusion test equipment shown in fig. 1 can be used for simultaneously carrying out extrusion test on eight products to be tested.

In each test station 200, a test tool 210 and two

air cylinders

220, 230 are arranged, as shown in fig. 3. The testing fixture 210 is used for carrying a product to be tested; the two

cylinders

220, 230 are disposed on opposite sides of the testing fixture 210, and are used for synchronously clicking opposite ends of a product to be tested placed on the testing fixture 210, so as to achieve the purpose of extrusion.

In this embodiment, the test fixture 210 may include a stage 211 and a rotating base 212. The carrier 211 is used for carrying a product to be tested. In order to ensure that the product to be tested can be stably assembled on the carrier 211, and prevent the product to be tested from loosening after multiple times of clicking operations, which further results in a situation that the error rate of the test result is high, in this embodiment, a clamp is preferably arranged on the carrier 211, and the shape and size of the clamp are designed in an adaptive manner according to the shape of the outer contour of the product to be tested, which is not specifically limited in this embodiment. The product to be tested is clamped by the clamp, so that the product to be tested can be stably fixed on the carrier 211.

The stage 211 is mounted on the rotary base 212, and the rotary base 212 drives the stage 211 to rotate, so that the relative position between the product to be measured on the stage 211 and the

air cylinders

220 and 230 can be adjusted, and the purpose of changing the position of the impact point is achieved. The product to be tested is subjected to multi-directional extrusion testing, the test result is comprehensively generated, the accuracy of the test result is improved, and meanwhile, the test requirement that some products to be tested need multi-directional extrusion can be met.

In some embodiments, the rotating base 212 may be assembled by using a fixed base 214 and a turntable 213, as shown in fig. 1 and 5. The fixed base 214 may be fixedly installed on the top surface of the console 100, and the turntable 213 is located above the fixed base 214, coaxially assembled with the fixed base 213, and can rotate in the horizontal direction relative to the fixed base 214. The stage 211 is fixedly mounted on the turntable 213 and rotates synchronously with the turntable 213.

In order to accurately control the rotation angle of the product to be measured, it is preferable to provide a rotation angle dial 217 and a fastening screw 215 on the fixing base 214, as shown in fig. 5. Wherein the angle dial 217 is preferably formed on the top of the side of the fixing base 214 and is formed to surround the fixing base 214. A handle 216 may be provided at the side of the dial 213 and a reference line may be marked at the bottom of the side of the dial 213. Initially, the technician may operate handle 216 to rotate dial 213 to align the reference line with the 0 scale line on angle dial 217. Then, the operation handle 216 rotates the turntable 213 until the position of the product to be measured on the stage 211 facing the

air cylinders

222 and 230 is the desired pressing point position. At this time, the fastening screw 215 is tightened to fasten the turntable 213 and the fixing base 214 together. After the extrusion test is finished, the fastening screw 215 is loosened, and the turntable 213 is rotated clockwise or counterclockwise, so that the position of the extrusion point of the product to be tested can be changed, and the purpose of carrying out the extrusion test on the product to be tested from different directions is achieved. With the help of the corner dial 217, technicians can intuitively and accurately adjust the product to be measured to reach any required extrusion position, and the device is convenient and practical.

One

air cylinder

220, 230 is respectively arranged on two opposite sides of the test fixture 210, as shown in fig. 3. The

air inlet pipes

222, 232 of the two

cylinders

220, 230 are connected to the same air flow line 241, as shown in connection with fig. 6. The same air flow pipeline 241 is used for supplying air to the

air inlet pipes

222 and 232 of the two

air cylinders

220 and 230 simultaneously, so that the

piston contacts

221 and 231 of the two

air cylinders

220 and 230 can be controlled to be synchronously pushed out (extended), and the opposite ends of a detected product are clicked at the same time, so that the extrusion effect is generated.

In order to control the

piston contacts

221, 231 of the two

cylinders

220, 230 to retract synchronously, the

air outlet pipes

223, 233 of the two

cylinders

220, 230 may be connected to the same air return pipe 242, as shown in fig. 3 and 6. The air pump is used for inflating the air flow line 241, so that high-pressure air flows to the

air inlet pipes

222 and 232 of the two

cylinders

220 and 230 through the air flow line 241, and the

piston contacts

221 and 231 of the two

cylinders

220 and 230 are pushed to extend synchronously. During this period, the

outlet pipes

223 and 233 of the two

cylinders

220 and 230 are connected to the atmosphere through the return pipe 242, and are in an exhaust state. On the contrary, the air pump is used to charge the air return pipe 242, so that the high-pressure air flows to the

air outlet pipes

223, 233 of the two

cylinders

220, 230 through the air return pipe 242 at the same time, and further pushes the

piston contacts

221, 231 of the two

cylinders

220, 230 to retract synchronously. During this time, the

intake pipes

222, 232 of the two

cylinders

220, 230 are connected to the atmosphere through the airflow line 241, and are in an exhaust state.

In order to switch the air intake/exhaust states of the air flow line 241 and the air return line 242, in the case where only one test station 200 is disposed on the console 100, a reversing valve 240 may be additionally provided between the air pump and the air flow line 241 and the air return line 242, and as shown in fig. 6 and 7, the air pump is connected to an air inlet 243 of the reversing valve 240 to alternately supply air to the air flow line 241 and the air return line 242 through the reversing valve 240.

Referring to fig. 6, when the air flow line 241 communicates with the air inlet 243 of the direction valve 240, the air return line 242 communicates with the direction valve 240 to the atmosphere, and is in an air discharge state. Conversely, referring to fig. 7, when the directional valve 240 switches its inlet 243 into communication with the return line 242, the air flow line 241 communicates the directional valve 240 to atmosphere, in the exhaust state.

In order to realize centralized control of the air supply and exhaust states of all the test stations 200 and optimize the layout design of the air paths when a plurality of test stations 200 are arranged on the console 100, a bus plate may be arranged inside the box of the console 100 instead of the reversing valve 240 to realize centralized air supply and centralized air exhaust.

In some embodiments, two bus plates may be provided, wherein one bus plate connects the air flow lines 241 of each test station 200 for centralized air supply and centralized air exhaust control of the air flow lines 241 of all test stations 200. And the other confluence plate is connected with the air return pipeline 242 of each test station 200 and is used for performing centralized air supply and centralized air exhaust control on the air return pipelines 242 of all the test stations 200.

In consideration of the fact that not all the test stations 200 need to perform the extrusion test on the product to be tested at the same time in the actual use process, each test station 200 on the console 100 needs to be controlled independently.

In order to achieve the above design purpose, the present embodiment preferably installs one solenoid valve on each of the air flow line 241 and the air return line 242 of each test station 200, that is, 16 solenoid valves are needed for eight test stations 200. The electromagnetic valve is installed on the air flow pipeline 241 and is used for controlling the opening and closing of the air flow flowing through the

air inlet pipes

222 and 232 of the two

air cylinders

220 and 230; and a solenoid valve installed on the return line 242 for opening and closing control of the flow of the gas flowing through the

outlet pipes

223, 233 of the two

cylinders

220, 230. When a certain test station 200 does not need to enter a test state, the two solenoid valves corresponding to the test station 200 may be closed to control the two

cylinders

220 and 230 of the test station 200 to stop operating. On the contrary, when a product to be tested is on one of the test stations 200 and the product to be tested needs to be subjected to extrusion test, the two

cylinders

220 and 230 of the test station 200 can be controlled to enter the working state only by opening the two electromagnetic valves corresponding to the test station 200.

In this embodiment, the airflow pipeline 241, the air return pipeline 242 and the electromagnetic valve are preferably disposed inside the box of the console 100 to ensure a simple and beautiful appearance of the extrusion testing apparatus. The air pump required for air supply may be built in the cabinet of the console 100, or may be external, and this embodiment does not specifically limit this.

In order to make the extrusion testing apparatus of the present embodiment have versatility to meet the extrusion testing requirements of different types of test products, in consideration of the fact that the extrusion forces required by different test products may be different, pressure regulating valves are respectively installed on the

air inlet pipes

222, 232 of the two

air cylinders

220, 230 of each testing station 200 for regulating the air flows flowing into the two

air cylinders

220, 230. By changing the air flow, the force exerted by the

piston contacts

221 and 231 of the two

cylinders

220 and 230 can be changed, and different extrusion forces can be generated on the product to be measured.

As a preferred embodiment, the pressure regulating valve may be built in the casing of the console 100, and the operation knob 101 of the pressure regulating valve may be installed on an outer surface of the casing of the console 100, for example, on the back of the casing, as shown in fig. 2, for a technician to operate the pressure regulating valve conveniently.

In order to position the

air cylinders

220, 230, the present embodiment is configured with two

columns

240, 250 and two

brackets

241, 251 for each test station 200, respectively, as shown in fig. 3-5. The two

columns

240 and 250 may be fixedly installed on the top surface of the box of the console 100 and respectively disposed on two opposite sides of the test fixture 210, that is, two opposite sides where the two

cylinders

220 and 230 are located. A bracket 241/251 is mounted on each post 240/250, and a cylinder 220/230 is mounted on the bracket 241/251 to position the

cylinders

220, 230.

In this embodiment, the

brackets

241, 251 are preferably designed in an L shape, the air cylinder 220/230 is mounted on one side plate of the bracket 241/251, and the other side plate of the bracket 241/251 can be movably mounted on the upright 240/250 by an elastic clip 242/252, so as to realize free adjustment of the up-and-down position of the air cylinder 220/230.

In some embodiments, the

vertical columns

240 and 250 may be provided with vertical strip holes 243 and 253, as shown in fig. 4 and 5. The

resilient clips

242, 252 are connected to the

brackets

241, 251 through the strip-shaped

holes

243, 253 of the

uprights

240, 250. When the positions of the

air cylinders

220 and 230 need to be adjusted, the

elastic clips

242 and 252 are pressed to loosen the

upright posts

240 and 250, and the

elastic clips

242 and 252 move up and down along the strip-shaped

holes

243 and 253, so that the up-and-down positions of the

air cylinders

220 and 230 can be changed. After the

air cylinders

220 and 230 reach the proper positions, the

elastic clips

242 and 252 are released and clamped on the

upright posts

240 and 250, and the

air cylinders

220 and 230 are positioned at the required positions.

In order to prevent the

supports

241, 251 from deflecting in the horizontal and vertical directions due to the vibration of the

cylinders

220, 230, the present embodiment is further provided with

positioning portions

244, 254 on the

supports

241, 251, as shown in fig. 5. In some embodiments, the positioning

portions

244 and 254 may be designed in a long strip shape and vertically installed on the side of the

brackets

241 and 251 facing the

pillars

240 and 250. When the

brackets

241, 251 are mounted on the

vertical posts

240, 250, the elongated plate-shaped

positioning portions

244, 254 are attached to one of the vertical outer side surfaces of the

vertical posts

240, 250, for example, completely attached to two vertical surfaces adjacent to and facing the two

vertical posts

240, 250, as shown in fig. 4. By the cooperation of the

positioning portions

244 and 254 and the

elastic clips

242 and 252, the

supports

241 and 251 can be prevented from deflecting in the horizontal and vertical directions, and the positioning stability of the

air cylinders

220 and 230 can be improved.

When the product to be tested is an electronic product with a pressure sensor, for example, a wireless earphone and the like, the detection signal output by the pressure sensor in the product to be tested can be collected while the product to be tested is subjected to extrusion test by using the

air cylinders

220 and 230, and the performance of the pressure sensor can be judged according to the detection signal.

In order to realize the automatic evaluation of the performance of the pressure sensor, a signal collector may be disposed on the console 100, and is used for being electrically connected to the pressure sensor in the product to be tested installed on the test fixture 210, so as to collect the detection signal output by the pressure sensor, and transmit the detection signal to the main control board. The main control board may be disposed in the box of the console 100, and is configured to determine the performance of the pressure sensor according to the detection signal output by the pressure sensor.

The console 100 may further include a touch panel 102, as shown in fig. 1, for receiving configuration parameters input by a technician and transmitting the configuration parameters to the main control board. The main control board can control the operation of the

air cylinders

220 and 230 of the test stations 200 according to the received configuration parameters, and display the pressure values detected by the pressure sensors on the touch panel 102.

The console 100 may further include a cooling fan 103 and a power outlet 104, and the power outlet 104 is connected to an external power supply to supply power to each power load in the console 100. In the operation process of the extrusion test equipment, the cooling fan 103 may be turned on to lower the operating temperature of each electrical load in the console 100, so as to ensure the reliability of the operation of the equipment.

The working principle of the extrusion testing device of the present embodiment is described in detail below by taking a wireless headset as an example of a product to be tested.

Before the wireless earphone is subjected to extrusion test, the force sensors are used for adjusting the output force of the

air cylinders

220 and 230 to achieve the required click force.

Specifically, the force value sensor can be placed on the test fixture 210, and the positions of the piston contacts of the two

cylinders

220 and 230 are adjusted to be opposite to the center position of the force value sensor. Air is simultaneously supplied to the

air inlet pipes

222 and 232 of the two

air cylinders

220 and 230 through the same air flow pipeline 241 so as to control the

piston contacts

221 and 231 of the two

air cylinders

220 and 230 to synchronously extend, and meanwhile, the opposite sides of the force value sensors are clicked so as to generate the extrusion force. The signal collector is used for collecting a pressure value output by the pressure value sensor, and the operation knob 101 of the pressure regulating valve is adjusted according to the pressure value so as to change the size of air flow flowing to the two

air cylinders

220 and 230, and further change the output force of the two

air cylinders

220 and 230, so that the wireless earphone extrusion test requirement is met.

After the adjustment is completed, the force sensor is taken down from the test fixture 210, and the wireless headset starts to be extruded and tested. The method specifically comprises the following steps:

step1, setting test parameters on the touch panel 102.

In this embodiment, the test parameters may include, but are not limited to: extrusion force, test action requirement, action cycle number N and the like. Wherein, the extrusion force can be confirmed according to the pressure value detected and output by the force value sensor. The test action requirements may be determined as desired, for example: firstly, carrying out pressure maintaining for 0.2 second and pressure relief for 0.3 second for 23 times; then, 2 seconds of dwell pressure +0.5 seconds of pressure relief were performed again 7 times. The loop is executed N times as required by this test action.

Step2, the wireless headset is clamped and fixed on the carrier 210 by the clamp on the test fixture 210.

Then, the positions of the

air cylinders

220 and 230 on both sides of the testing fixture 210 are adjusted, so that the

piston contacts

221 and 231 of the two

air cylinders

220 and 230 are aligned with the handle position of the wireless headset and are opposite to the position where the pressure sensor is arranged in the headset handle.

Step3, rotate the dial 213 to align the reference line with the 0 ° graduation mark (or other suitable graduation) of the angle dial 217 on the fixed base 214.

Step4, starting the air pump, controlling the two

air cylinders

220 and 230 to perform extrusion test on the wireless earphone according to the set test action requirement and the action cycle number N, acquiring a detection signal output by a pressure sensor in the wireless earphone through the signal acquisition unit, generating a pressure value, and transmitting the pressure value to the main control board.

Step5, after the number of cycles N to be set is reached, the dial 213 is rotated clockwise or counterclockwise by a certain angle, for example, 90 °, to change the pressing force-bearing surface of the wireless earphone, and Step4 is repeatedly executed.

Step6, the main control board can generate a [ force-time ] curve according to the received pressure value, so as to be used for judging the performance of the pressure sensor. Of course, other existing determination methods may be used to determine the performance of the pressure sensor, and the embodiment is not limited to the above example.

In the operation process of the extrusion test equipment, the pressure value detected by the pressure sensor and the test result generated by the main control board can be displayed on the touch panel 102, so that the observation and the recording of technicians are facilitated.

The extrusion test equipment of this embodiment utilizes an air pipe control two cylinders to move simultaneously, can avoid two cylinders to appear the problem of action desynchronization from this, has guaranteed the effective production of extrusion force, has improved test operation's accuracy, has reduced retest rate.

Meanwhile, a plurality of test stations are provided on one control platform, a plurality of products to be tested can be synchronously subjected to extrusion test, the test efficiency is high, the test time is short, and the labor and time cost are greatly saved.

It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.

Claims

1. A compression testing apparatus having a plurality of test stations, each test station comprising:

the test fixture is used for bearing a product to be tested;

the two air cylinders are respectively arranged on two opposite sides of the test fixture, and air inlet pipes of the two air cylinders are connected to the same air flow pipeline; the air flow pipeline is used for supplying air to the air inlet pipes of the two cylinders simultaneously so as to control the piston contacts of the two cylinders to be pushed out synchronously and extrude the product to be tested on the test fixture.

2. The extrusion test apparatus of claim 1, wherein the outlet pipes of the two cylinders are connected to the same return pipe, and the return pipe is used for supplying gas to the outlet pipes of the two cylinders simultaneously so as to control the piston contacts of the two cylinders to retract synchronously.

3. The extrusion testing apparatus of claim 2, wherein the gas flow line and the gas return line are alternately supplied with gas through a directional valve, and when one of the lines is in a gas supply state, the other line is open to the atmosphere and is in a gas discharge state.

4. The crush testing apparatus of claim 2, wherein the test station further comprises:

the electromagnetic valves comprise two electromagnetic valves, one of which is arranged on the airflow pipeline and is used for controlling the opening and closing of the airflow flowing through the air inlet pipes of the two cylinders; the other air return pipeline is arranged on the air return pipeline and is used for controlling the opening and closing of the air flow flowing through the air outlet pipes of the two air cylinders;

and the two pressure regulating valves are respectively arranged on the air inlet pipes of the two cylinders and are used for regulating the air flow of each cylinder.

5. The crush test apparatus of claim 4, further comprising:

the control platform is of a box body structure, a plurality of test stations are distributed on the top surface of the box body, the airflow pipeline, the air return pipeline, the electromagnetic valve and the pressure regulating valve are arranged in the box body, and an operation knob of the pressure regulating valve is arranged on the outer surface of the box body;

the bus plates comprise two bus plates which are arranged in a box body of the console, wherein one bus plate is connected with the airflow pipeline of each testing station and is used for performing centralized air supply and centralized air exhaust control on the airflow pipelines of all the testing stations; and the other collecting plate is connected with the air return pipeline of each testing station and is used for performing centralized air supply and centralized air exhaust control on the air return pipelines of all the testing stations.

6. The crush test apparatus of claim 5, further comprising:

the signal collector is arranged on the console and is used for being electrically connected with a pressure sensor in a product to be tested, which is arranged on the test fixture, so as to collect a detection signal output by the pressure sensor;

and the main control board is arranged in the box body of the console, is connected with the signal collector and judges the performance of the pressure sensor according to the detection signal output by the pressure sensor.

7. The compression testing apparatus of any one of claims 1-6, wherein the test fixture comprises:

the device comprises a carrying platform, a clamping device and a positioning device, wherein the carrying platform is provided with the clamping device, and the clamping device is used for clamping and fixing a product to be detected;

the rotating base is arranged below the carrier and used for driving the carrier to rotate so as to adjust the extrusion position of the product to be measured on the carrier.

8. The squeeze testing apparatus of claim 7, wherein the swivel comprises:

the fixed base is provided with a corner dial and a fastening screw;

the rotary table is coaxially and rotatably assembled with the fixed base and can be fixedly assembled with the fixed base under the fastening action of the fastening screw; the carrier is mounted on the turntable.

9. The extrusion testing apparatus of any one of claims 1 to 6, wherein the testing station further comprises:

the two upright columns are respectively used for supporting and positioning the two cylinders, and each upright column is provided with a vertical strip-shaped assembling hole;

the two supports are provided, and each support is provided with one air cylinder;

the two elastic clips respectively penetrate through the vertical strip-shaped assembling holes in the two upright columns and are correspondingly arranged on the two brackets; the elastic clamp can move up and down along the vertical strip-shaped assembling hole in a pressing state so as to be used for adjusting the up-down position of the air cylinder; the elastic clamp is fastened in the vertical strip-shaped assembly hole in a loose state so as to fix the position of the air cylinder.

10. The extrusion testing apparatus of claim 9, wherein the bracket is provided with a positioning portion, which is in the form of an elongated plate, vertically mounted on the bracket and engaging a vertical surface of the outer side of the column for preventing the bracket from deflecting in the horizontal and vertical directions.

11. A method for testing extrusion, characterized in that,

adjusting the positions of the two cylinders to enable the piston contacts of the two cylinders to be aligned to the extrusion positions of the product to be detected, wherein the extrusion positions correspond to the positions of the product to be detected where the pressure sensors are arranged;

and collecting a detection signal output by a pressure sensor in the product to be detected, and generating an extrusion test result according to the detection signal.