A precision measuring device for opening pressure and lift of electromagnet

Abstract

The present invention provides a device capable of accurately completing the measurement of the opening pressure and lift of an electromagnet, comprising: a mounting platform at the bottom and a loading platform fixed on the mounting platform by a bracket; a workpiece positioning mechanism is arranged on the loading platform for placing the electromagnet; a clamping mechanism that can move up and down is arranged above the workpiece positioning mechanism, and the electromagnet at the workpiece positioning mechanism is clamped and fixed by up and down displacement; a measuring mechanism is arranged below the workpiece positioning mechanism; the measuring mechanism at least includes a displacement sensor and a pressure sensor. From the above, through the cooperation of the displacement sensor, the pressure sensor and other action parts, the opening pressure and lift value of the electromagnet can be detected simultaneously on a measuring mechanism.

Description

Technical Field

[0001] The invention relates to a precise measuring device for the opening pressure and lift of an electromagnet. Background Art

[0002] The electromagnet is an important part of the injector, and its opening pressure and lift value are very important process parameters. The electromagnet lift refers to the distance the valve seat can move when the electromagnet is opened during the operation of the injector. Whether its size is within the range directly affects whether the injector can open normally, and further affects the injection performance of the injector.

[0003] Directly and accurately measuring the opening pressure and lift value of the electromagnet at the same time can provide the most intuitive reference for the processing and assembly of the injector. However, there is currently no measurement mechanism that can accurately measure the above two parameters at the same time. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a device capable of accurately measuring the opening pressure and lift of an electromagnet.

[0005] The measuring device of the present invention comprises:

[0006] A mounting platform at the bottom and a loading platform fixed on the mounting platform via a bracket;

[0007] The loading platform is provided with a workpiece positioning mechanism for placing the electromagnet;

[0008] A clamping mechanism that can move up and down is arranged above the workpiece positioning mechanism, and the electromagnet at the workpiece positioning mechanism is clamped and fixed by moving up and down;

[0009] A measuring mechanism is arranged below the workpiece positioning mechanism;

[0010] The measuring mechanism at least includes a displacement sensor and a pressure sensor.

[0011] From the above, through the cooperation of the displacement sensor, the pressure sensor and other action parts, it is possible to simultaneously detect the opening pressure and the lift value of the electromagnet on a measuring mechanism.

[0012] In addition, it also includes a workpiece detection sensor for detecting whether an electromagnet is configured on the workpiece positioning mechanism.

[0013] From the above, it is possible to automatically detect whether the electromagnet is correctly placed on the measuring mechanism, thereby improving the degree of automation.

[0014] Wherein, the pressing mechanism comprises:

[0015] The precision upper pressure head can be moved up and down by hydraulic cylinder drive;

[0016] A pressing mechanism is arranged below the precision upper pressing head and matched with the precision upper pressing head.

[0017] In addition, it also includes a guiding mechanism, under the guidance of which the precision upper pressure head moves up and down and is aligned with the positioning mechanism.

[0018] From the above, the pressing / releasing action of the electromagnet is realized, and the electromagnet is placed in different force environments through different actions, thereby realizing the detection of the opening pressure and lift value.

[0019] Wherein, the measuring mechanism further comprises:

[0020] Servo motor;

[0021] A precision pressure head disposed on the top of the servo motor;

[0022] The pressure sensor is arranged on the top of the precision pressure head.

[0023] From the above, the servo motor drives the precision pressure head to move, and finally controls the displacement sensor and pressure sensor to contact the electromagnet for detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is the front view of the precision measuring device for the opening pressure and lift of the electromagnet;

[0025] Figure 2 For Figure 1 A schematic diagram of a cross-section of the measured component on the basis;

[0026] Figure 3 A partial enlarged schematic diagram of the measured component. DETAILED DESCRIPTION

[0027] Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0028] like Figures 1 to 3 As shown, the electromagnet opening pressure and lift precision measuring device in this embodiment is used to measure the opening pressure and lift value of the electromagnet W as a workpiece. It has a mounting platform 300 placed at the bottom, and a workpiece positioning mechanism is arranged on the mounting platform 300 to fix the electromagnet W. It can be seen from the accompanying drawings that the electromagnet W includes a body (valve seat) of a cylindrical structure and an armature of a T-shaped structure at the bottom of the body. The clamping mechanism fixes the body of the electromagnet W from the upper part of the electromagnet W, and then the measuring mechanism contacts the armature at the bottom of the body and applies an upward force. The relative displacement between the armature and the body reflects the lift value of the electromagnet W.

[0029] <Clamping mechanism>

[0030] The clamping mechanism is disposed on a loading platform 105, and the loading platform 105 is supported on the mounting platform 300 through a bracket 106. A workpiece positioning mechanism 201 is disposed at the center of the loading platform 105 for accommodating an electromagnet W as a workpiece.

[0031] The clamping mechanism is arranged directly above the workpiece positioning mechanism 201, and includes a precision upper pressing head 101 that moves up and down relative to the workpiece positioning mechanism 201. The precision upper pressing head 101 is driven by a hydraulic cylinder 106 and moves up and down under the guidance of a guide mechanism 102, thereby clamping the electromagnet W downward.

[0032] The clamping mechanism also includes a pressing mechanism 104 matched with the precision upper pressing head 101, and the pressing mechanism 104 is manually placed on the upper part of the electromagnet W. The pressing mechanism 104 can also be omitted. The precision upper pressing head 101, the pressing mechanism 104 and the positioning mechanism 201 are aligned. This ensures that when the electromagnet W is placed at the workpiece positioning mechanism 201, the precision upper pressing head 101 presses down, thereby acting on the pressing mechanism 104, and finally the pressing mechanism 104 acts to press the electromagnet W downward.

[0033] <Measurement mechanism>

[0034] The measuring mechanism includes a servo motor 205 disposed on the mounting platform 300. A precision press head 204 is disposed on the top of the servo motor 205. A pressure sensor 203 and a displacement sensor 202 are respectively connected to the precision press head 204 and are driven by the precision press head 204 to move in the up and down directions.

[0035] It also includes a control unit, which is electrically connected to the pressure sensor 203 and the displacement sensor 202 respectively, and is used to receive data collected by the two.

[0036] Preferably, a workpiece detection sensor 103 is further included, which is arranged toward the workpiece positioning mechanism 201 and is used to detect whether the electromagnet W is placed in place. The workpiece detection sensor 103 can be implemented by an infrared detection device or an image detection device, which is not specifically limited. The workpiece detection sensor 103 can be configured in the fixed section of the guide mechanism 102.

[0037] <Action>

[0038] The operation of the electromagnet opening pressure and lift precision measuring device of this embodiment is described below. Under the control of the control unit, the measurement is performed according to the following four steps.

[0039] A: After the electromagnet W is placed on the workpiece positioning mechanism 201, the pressing mechanism 104 is manually configured on the electromagnet W, and the workpiece detection sensor 103 outputs a control signal after detecting that the electromagnet W is correctly placed. After receiving the control signal, the control unit controls the hydraulic cylinder 106 to drive the precision upper pressure head 101 to perform the pressing action; at this time, the pressure sensor 203 and the displacement sensor 202 respectively record a test initial value N0 and S0. In addition, the above control signal can also be manually started.

[0040] B: The pressing mechanism 104 presses the electromagnet W (body) The control unit controls the servo motor 205 to operate based on the control signal. The servo motor 205 drives the precision press head 204 to operate.

[0041] The pressure sensor 203 and the displacement sensor 202 record a first set of measurement values ​​N1 and S1 respectively.

[0042] C: Return the pressing mechanism 104 to the initial position. The control unit controls an external power supply device (not shown) to close the power supply circuit of the electromagnet W. The servo motor 205 works, and the pressing head connected thereto moves.

[0043] The pressure sensor 203 and the displacement sensor 202 perform measurements and record the second set of measurement values ​​N2 and S2 respectively.

[0044] After completing the recording of the second set of measurement values, the pressure sensor 203 and the displacement sensor 202 upload the collected test initial values ​​(N0, S0), the first set of measurement values ​​(N1, S1), and the second set of measurement values ​​(N2, S2) to the terminal respectively through the communication device connected thereto.

[0045] The terminal (personal computer) performs analysis and calculation of the opening pressure and lift value based on the above data. The terminal is not included in the electromagnet opening pressure and lift precision measuring device of this embodiment, so the description of the processing in the terminal is omitted.

[0046] D: The servo mechanism 205 drives the precision pressing head 204 to return to the initial position, and the precision upper pressing head 101 returns to the initial position, and the current measurement ends. Return to step A and wait for the measurement of the next batch of electromagnets W.

[0047] By adopting this embodiment, for example, the following technical effects can be obtained.

[0048] ①Meet the requirements of measuring the opening pressure and lift value of the electromagnet at the same time

[0049] It fills the gap in the current electromagnet testing device, and can detect its opening pressure and lift value at the same time, so as to find quality defects in time and improve the injection performance of the injector.

[0050] ②Test Automation

[0051] First, the workpiece detection sensor 103 detects whether the electromagnet is correctly placed. Then the clamping mechanism clamps and releases the electromagnet, and the measuring mechanism measures the opening pressure and lift value. The whole measurement process is automated without manual intervention.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A precision measuring device for opening pressure and lift of an electromagnet, characterized in that: include: A mounting platform (300) at the bottom and a loading platform (105) fixed to the mounting platform (300) via a bracket (106); The loading platform (105) is provided with a workpiece positioning mechanism (201) for placing an electromagnet (W), wherein the electromagnet (W) comprises a body and an armature at the bottom of the body; A clamping mechanism that can move up and down is arranged above the workpiece positioning mechanism (201), and the electromagnet (W) at the workpiece positioning mechanism (201) is clamped and fixed by moving downward; the clamping mechanism comprises a precision upper pressing head (101) that can be moved up and down by a hydraulic cylinder drive; a lower pressing mechanism (104) that is detachably arranged below the precision upper pressing head (101) and is matched with the precision upper pressing head (101), and the lower pressing mechanism (104) is aligned with the precision upper pressing head (101); A guide mechanism (102), wherein the precision upper pressure head (101) moves up and down under the guidance of the guide mechanism (102) and is aligned with the positioning mechanism (201); A measuring mechanism is arranged below the workpiece positioning mechanism (201); The measuring mechanism comprises at least a displacement sensor (202) and a pressure sensor (203); and further comprises a servo motor (205); a precision pressure head (204) arranged on the top of the servo motor (205); the displacement sensor (202) and the pressure sensor (203) are respectively connected to the precision pressure head (204) and are driven thereby to move in an up-and-down direction; the pressure sensor (203) is arranged on the top of the precision pressure head (204); the measuring mechanism contacts the armature and applies an upward force, and the displacement sensor (202) detects the relative displacement between the armature and the body; It also includes a workpiece detection sensor (103) for detecting whether an electromagnet (W) is configured on the workpiece positioning mechanism (201); It also includes a control unit, which is electrically connected to the pressure sensor (203) and the displacement sensor (202) respectively, and is used to receive data collected by the two sensors; The measurement steps include: After the electromagnet (W) is placed on the workpiece positioning mechanism (201), the pressing mechanism (104) is arranged on the electromagnet (W), and the workpiece detection sensor (103) outputs a control signal after detecting that the electromagnet (W) is correctly placed; after receiving the control signal, the control unit controls the hydraulic cylinder to drive the precision upper pressing head (101) to perform a pressing action; at this time, the pressure sensor (203) and the displacement sensor (202) respectively record an initial test value; The pressing mechanism (104) presses the electromagnet (W), the control unit controls the servo motor (205) to work, and the servo motor (205) drives the precision pressing head (204) to move; the pressure sensor (203) and the displacement sensor (202) respectively record the first set of measurement values; The control unit controls the power supply of the electromagnet (W), the servo motor (205) works, and drives the precision pressure head (204) to move; the pressure sensor (203) and the displacement sensor (202) perform measurements, and respectively record the second set of measurement values; The opening pressure and lift value of the electromagnet (W) are determined according to the test initial value, the first set of measurement values ​​and the second set of measurement values.

Images