Pedal arm welding strength detection device and method

[0036] see Figure 2-Figure 5 , a pedal arm welding strength detection device, including a workbench, a clamping body 5 is arranged on the workbench for installing the pedal arm 2, a detection frame is arranged on the workbench, and a drive is arranged on the detection frame The drive system is connected to the probe 16 through the S-type force sensor 11, the probe is used to exert force on the pedal body at the end of the pedal arm, and detect the welding strength of the welding point at the connection between the pedal arm and the pedal body. The system is used to drive the probe translation and vertical movement.

[0037] The detection frame includes two vertical plates 17 arranged in parallel, the two vertical plates are located on both sides of the clamping body 5, and two horizontal plates 18 arranged in parallel are connected between the upper parts of the two vertical plates. A translation frame 19, a translation guide rail 15 is provided on the opposite surfaces of the two horizontal plates, and the translation frame is slidably matched with the translation guide rail. The servo motor 8 is powered by a power connection, and one side of the translation frame is provided with an extension portion (respectively welded with the translation frame 19 and the translation nut seat 20, and located below the horizontal plate), the extension portion bypasses the corresponding horizontal plate, and is provided with The translation nut seat, the translation nut seat 20 cooperates with the translation screw 9 to form a screw nut mechanism for driving the translation frame to translate.

[0038] The translation frame is provided with mutually parallel vertical movement guide rails 10 and vertical movement loading servo motors 7. A slider is slidably fitted on the vertical movement guide rail 10, and the lower end of the slider is connected to the measuring head through an S-shaped force sensor. The vertical movement loading servo motor 7 is dynamically connected to the vertical movement screw 6, one side of the slider is connected to the vertical movement nut seat 21, and the vertical movement nut seat 21 cooperates with the vertical movement screw 6 to form a screw nut mechanism , which is used to drive the probe to move vertically and apply force to the pedal arm 2.

[0039] The translation screw 9 is rotatably supported on the corresponding horizontal plate through the translation bearing seat 14 , and the vertical translation screw 6 is rotatably supported on the translation frame through the vertical translation bearing seat 12 .

[0040] The worktable is provided with a linear guide 4 and a position cylinder 3. The linear guide 4 is perpendicular to the translation direction of the probe. The lower end of the clamp body 5 is slidably fitted with the linear guide 4. The piston rod of the position cylinder 3 It is connected with the clamp body and used to adjust the position of the clamp body 5 along the axial direction of the linear guide 4 .

[0041] The clamping body 5 includes a bottom plate, which is slidably matched with the linear guide rail 4 . The bottom plate is provided with a casing positioning seat 22 , a middle support 23 , and an outer supporting plate 24 in sequence along the longitudinal direction. The upper part of the casing positioning seat is provided. A groove 25 is provided in the transverse direction for being inserted into the sleeve part of the pedal arm, the upper part of the sleeve positioning seat is provided with a slot 26 in the transverse direction, and the slot 26 is located in the upper part of the groove 25. A locking cylinder 1 is installed on the side, and a plug pin is fixed on the piston rod of the locking cylinder 1 for inserting into the slot, locking the sleeve part of the pedal arm, preventing the sleeve part of the pedal arm from coming out of the groove, and the sleeve The upper part of the pipe positioning seat is provided with a space for the rod part of the pedal arm to rotate;

[0042] The middle support is used for supporting the middle portion of the rod portion of the pedal arm, and the outer support plate is used for supporting the end portion of the rod portion of the pedal arm.

[0043] The slots are symmetrically arranged on both sides of the rod portion of the pedal arm, the latch is U-shaped, and the two insertion ends of the latch correspond to the slots on both sides of the rod portion of the pedal arm, which are used for locking the sleeve portion of the pedal arm. both ends.

[0044] The middle support includes two support blocks, the upper parts of the two support blocks are respectively provided with support grooves for supporting the middle sections of the two rods of the pedal arm, and the outer support plate is used to support the two rods of the pedal arm at the same time. end of the section.

[0045] The detection frame is provided with a control system and a touch screen 13 for controlling the driving system, and the S-shaped force sensor 11 is signally connected to the control system.

[0046]A method for detecting the welding strength of a pedal arm,

[0047] Insert the bushing part of the pedal arm into the groove on the upper part of the bushing positioning seat, lock the cylinder 1 to drive the latch so that the latch is inserted into the slot, lock the two ends of the bushing part of the pedal arm, and prevent the pedal arm from slipping. The pipe part comes out of the groove, so that the middle section of the rod section of the pedal arm is supported on the middle support, and the end section of the rod section supporting the pedal arm is supported on the outer support plate;

[0048] The position cylinder 3 works and drives the clamp body 5, so that the force point of the pedal arm and the probe are located on the same elevation;

[0049] The drive system works and drives the probe to translate, so that the force point of the pedal arm is located directly below the probe;

[0050] The drive system works, drives the probe to move vertically, and exerts downward force on the force point of the pedal arm at the set speed;

[0051] The computer commands the probe to reach the A and B measurement points (two force points) respectively for testing. Taking point A as an example, the probe reaches the measurement position of point A at high speed, and then loads the pedal arm downward at the set speed. At this time, the computer continuously collects and traces the force and the deformation and displacement of the pedal arm, and calculates Slope (dforce/ddisplacement). See if it appears within the specified test force range figure 1 The inflection point shown does not. If there is no indication of passing, the test will be stopped immediately if it occurs. For qualified parts, the robot will be notified to take it away for marking, and after marking, it will be sent to the arm assembly inspection station to inspect the size of the arm. Notify the robot to take the unqualified parts and put them in the waste bin.

[0052] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should Various changes may be made in details without departing from the scope of the invention as defined by the claims.