Solenoid valve element press-fitting method, press-fitting equipment, solenoid valve and application

Abstract

The invention discloses an electromagnetic valve element press-fitting method, press-fitting equipment, an electromagnetic valve and application, and belongs to the field of electromagnetic valves for automobile braking. The electromagnetic valve element press-fitting method comprises the following steps that S1, feeding is conducted, specifically, the electromagnetic valve to be press-fitted is placed on a pressing tool of a press; s2, pre-pressing is conducted, specifically, a lower pressing head of the pressing machine moves downwards, a movable core of the to-be-pressed electromagnetic valve is pre-pressed to a second preset position, and in the process, the stroke value of the lower pressing head is detected to be # imgabs0 #; s3, stroke adjustment: electrifying a coil in an upper pressing tool to drive a lower pressing head to extend out, adjusting the position of a movable core, and detecting the stroke value of the lower pressing head to be # imgabs 1 # in the process; and S4, retest confirmation: calculating # imgabs2 #, judging whether # imgabs3 # is greater than a threshold value or not, if so, returning to the step S3, and if not, stopping press fitting. By the adoption of the electromagnetic valve element press-fitting method, the press-fitting equipment, the electromagnetic valve and the application, precision adjustment of 0.01 mm (namely 10 micrometers) can be achieved, and the press-fitting precision of the electromagnetic valve is remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of electromagnetic valves for automobile braking, and in particular to an electromagnetic valve core press-fitting method, press-fitting equipment, an electromagnetic valve and applications. Background Art

[0002] The moving core stroke of the solenoid valve for automobile brakes refers to the distance that the moving core (or piston) inside the solenoid valve moves under the action of electromagnetic force. This stroke is crucial to the working performance of the solenoid valve because it directly affects the opening and closing state of the valve, and thus affects the flow control of the brake fluid (the working principle of the normally closed solenoid valve is based on the interaction between electromagnetic force and spring force. When the control coil is energized, the electromagnetic force overcomes the spring force, causing the moving core to rise, the valve to open, and the brake fluid to flow; when the control coil is de-energized, the electromagnetic force disappears, the spring force presses the moving core back to the valve seat, the valve closes, and the brake fluid is intercepted and sealed), thereby achieving precise braking control.

[0003] Correspondingly, the valve core of the solenoid valve is currently press-fitted using a press. However, the traditional press lacks a stroke detection mechanism, making it difficult for the press-fitting accuracy to reach the micron level. In addition, there may be slight differences in raw materials from different batches, resulting in inconsistent performance of the solenoid valves after press-fitting using the same press. Summary of the invention

[0004] The purpose of the present invention is to provide a solenoid valve core press-fitting method, press-fitting equipment, solenoid valve and application to solve the above technical problems.

[0005] To achieve the above object, the present invention provides a solenoid valve core press-fitting method, comprising the following steps: S1. Loading: Place the solenoid valve to be pressed on the lower pressing tooling of the press; S2, pre-pressing: The lower pressure head of the press moves downward to pre-press the moving core of the solenoid valve to be installed to the second preset position. During this process, the stroke value of the lower pressure head is detected. ; S3, stroke adjustment: the coil in the upper pressure tooling is energized to drive the lower pressure head to extend and adjust the position of the moving core. During this process, the stroke value of the lower pressure head is detected. ; S4. Retest and confirm: Calculation , and judge Is it greater than the threshold? If so, return to step S3; if not, stop pressing.

[0006] Preferably, in step S2, the pressing head first moves downward at a speed of 200 mm / s to a first preset position, and then moves downward at a speed of 50 mm / s to a second preset position, wherein the vertical distance between the first preset position and the initial position is 110 mm, and the vertical distance between the second preset position and the initial position is 119.7 mm. =119.7mm.

[0007] Preferably, in step S3, the pressing speed of the pressing head is 0.02 mm / s.

[0008] Preferably, the pressing equipment includes a press mainly composed of a machine base, an upper pressing tooling arranged on the machine base, and a lower pressing tooling arranged directly below the upper pressing tooling, the upper pressing tooling includes an upper pressing head and a coil for driving the upper pressing head to extend and retract, the lower pressing tooling is internally positioned with an electromagnetic valve to be pressed, a displacement sensor is provided at the bottom end of the lower pressing tooling, the displacement sensor is electrically connected to the input end of the PLC controller, and the output end of the PLC controller is electrically connected to the coil.

[0009] Preferably, the displacement sensor is a GT displacement sensor or a LVDT displacement sensor.

[0010] The solenoid valve prepared by the solenoid valve core pressing device has an accuracy of 0.01 mm.

[0011] The solenoid valve is used in automobile braking.

[0012] Therefore, the present invention adopts the above-mentioned solenoid valve core press-fitting method, press-fitting equipment, solenoid valve and application, and has the following beneficial effects: 1. High precision: It can achieve 0.01 mm (10 microns) precision adjustment, significantly improving the press-fitting accuracy of the solenoid valve; 2. Compensation for raw material differences: Through real-time monitoring and adjustment, the slight differences between different batches of raw materials can be compensated to ensure the consistent performance of each solenoid valve. The measured data is comprehensive, which makes it easy to analyze the press-fitting quality and expand its application to different production models. 3. Automated production: It realizes the automated pressing process, reduces the influence of human factors, and improves production efficiency and consistency; 4. Quality control: Real-time monitoring of force and stroke during the press-fitting process to promptly detect and correct possible quality problems and ensure that each solenoid valve meets strict process parameter requirements.

[0013] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a flow chart of a solenoid valve core press-fitting method according to the present invention; Figure 2 It is a structural schematic diagram of the press-fitting equipment of the present invention; Figure 3 The figure is a circuit diagram of the press-fitting device described in the present invention.

[0015] Reference numerals 1. Machine base; 2. Lower pressing tool; 3. Solenoid valve to be pressed; 4. Upper pressing tool; 5. Displacement sensor. DETAILED DESCRIPTION

[0016] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invented product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "setting", "installation", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0017] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0018] like Figure 1 As shown, a solenoid valve core press-fitting method comprises the following steps: S1. Loading: placing the solenoid valve 3 to be press-fitted on the pressing tool 2 of the press; in this embodiment, the loading can be performed by a robot or manually.

[0019] S2, pre-pressing: the lower pressure head of the press moves downward to pre-press the moving core of the solenoid valve 3 to be installed to the second preset position. During this process, the stroke value of the lower pressure head is detected. ; In step S2, the pressure head first moves downward at a speed of 200 mm / s to a first preset position, and then moves downward at a speed of 50 mm / s to a second preset position, wherein the vertical distance between the first preset position and the initial position is 110 mm, and the vertical distance between the second preset position and the initial position is 119.7 mm. =119.7mm.

[0020] S3, stroke adjustment: the coil in the upper pressure fixture 4 is energized to drive the lower pressure head to extend and adjust the position of the moving core. During this process, the stroke value of the lower pressure head is detected. ; In step S3, the pressing speed of the pressing head is 0.02 mm / s.

[0021] S4. Retest and confirm: Calculation , and judge Is it greater than the threshold? If so, return to step S3; if not, stop pressing.

[0022] like Figure 2 As shown, the pressing equipment includes a press machine which is mainly composed of a machine base 1, an upper pressing tool 4 arranged on the machine base 1, and a lower pressing tool 2 arranged directly below the upper pressing tool 4. The upper pressing tool 4 includes an upper pressing head and a coil for driving the upper pressing head to extend and retract. A solenoid valve 3 to be pressed is positioned inside the lower pressing tool 2. A displacement sensor 5 is arranged at the bottom end of the lower pressing tool 2. The displacement sensor 5 is electrically connected to the input end of the PLC controller, and the output end of the PLC controller is electrically connected to the coil.

[0023] The displacement sensor 5 is a GT displacement sensor or a LVDT displacement sensor.

[0024] The solenoid valve prepared by the solenoid valve core pressing device has an accuracy of 0.01 mm.

[0025] The solenoid valve is used in automobile braking.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A method for press-fitting a solenoid valve core, characterized in that: The following steps are involved: S1. Loading: Place the solenoid valve to be pressed on the lower pressing tooling of the press; S2, pre-pressing: The lower pressure head of the press moves downward to pre-press the moving core of the solenoid valve to be installed to the second preset position. During this process, the stroke value of the lower pressure head is detected. ; S3, stroke adjustment: the coil in the upper pressure tooling is energized to drive the lower pressure head to extend and adjust the position of the moving core. During this process, the stroke value of the lower pressure head is detected. ; S4. Retest and confirm: Calculation , and judge Is it greater than the threshold? If so, return to step S3; if not, stop pressing.

2. A solenoid valve core press-fitting method according to claim 1, characterized in that: In step S2, the pressure head first moves downward at a speed of 200 mm / s to a first preset position, and then moves downward at a speed of 50 mm / s to a second preset position, wherein the vertical distance between the first preset position and the initial position is 110 mm, and the vertical distance between the second preset position and the initial position is 119.7 mm. =119.7mm.

3. A solenoid valve core press-fitting method according to claim 1, characterized in that: In step S3, the pressing speed of the pressing head is 0.02 mm / s.

4. A press-fitting device for executing the solenoid valve core press-fitting method according to any one of claims 1 to 3, comprising a press mainly composed of a machine base, an upper press tooling arranged on the machine base, and a lower press tooling arranged directly below the upper press tooling, wherein the upper press tooling comprises an upper press head and a coil for driving the upper press head to extend and retract, and a solenoid valve to be press-fitted is positioned inside the lower press tooling, characterized in that: A displacement sensor is provided at the bottom end of the pressing tooling, the displacement sensor is electrically connected to the input end of the PLC controller, and the output end of the PLC controller is electrically connected to the coil.

5. The press-fitting device according to claim 4, characterized in that: The displacement sensor is a GT displacement sensor or a LVDT displacement sensor.

6. A solenoid valve manufactured by a solenoid valve core press-fitting device according to any one of claims 1 to 3, characterized in that: Its accuracy is 0.01mm.

7. Application of the solenoid valve as claimed in claim 6 in automobile braking.

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