Non-blind-area positioning and rotation driving mechanism applied to eddy current detection of short-shaft part

Abstract

The utility model relates to a non-blind area positioning and rotation driving mechanism applied to short shaft part eddy current detection, which comprises an eddy current probe, a base, a driven assembly, a supporting block and a driving assembly, the driven assembly, the supporting block and the driving assembly are sequentially arranged on the base, a detected part is placed on the supporting block, the eddy current probe is arranged right above the detected part, and the driving assembly is arranged on the base. The driving assembly and the driven assembly clamp the tested part and drive the tested part to rotate. According to the non-blind-area positioning and rotation driving mechanism applied to the eddy current detection of the short-shaft part, a fixing mode of clamping the outer circle of the part by a three-jaw clamp is replaced by a mode of ejecting and clamping two end surfaces, the problem that the eddy current detection space is occupied by clamping is solved, the whole detection of the outer circle of the part can be realized without dividing into two stations, and the detection efficiency is improved. And the detection efficiency is ensured, and meanwhile, the equipment cost and the occupied space are saved.

Description

Technical Field

[0001] The utility model relates to the field of eddy current detection, in particular to a blind-zone-free positioning and rotation driving mechanism used for eddy current detection of short-shaft parts. Background Art

[0002] For short shaft parts with an aspect ratio of less than 1, positioning and rotation drive are relatively complicated when eddy current testing is used, such as Figure 1 As shown, if three jaws are used to clamp the outer diameter, interference between the probe and the three jaws will inevitably occur, resulting in a blind spot. However, customers often require full inspection, so two workstations are required, clamping from two ends to achieve full outer diameter inspection. This becomes even more difficult when the axis length is sufficiently short. Utility Model Content

[0003] In order to solve the technical problems existing in the prior art, the utility model provides a positioning and rotation drive mechanism for eddy current detection of short-axis parts without blind spots, so as to perform a full inspection of the outer circle of the part.

[0004] In order to achieve the above object, the technical solution of the utility model is as follows:

[0005] A positioning and rotation drive mechanism for eddy current testing of short-axis parts without blind spots includes an eddy current probe, a base, a driven assembly, a support block and a drive assembly. The driven assembly, the support block and the drive assembly are sequentially mounted on the base, the part to be tested is placed on the support block, the eddy current probe is arranged directly above the part to be tested, and the part to be tested is clamped by the drive assembly and the driven assembly and driven to rotate.

[0006] As a preferred technical solution, the drive assembly includes a drive unit, a motor and an active push column. The drive unit is transmission-connected to the active push column. The drive unit drives the active push column to translate toward the driven assembly. The motor's shaft is coaxially arranged and transmission-connected to the active push column. The motor drives the active push column to rotate.

[0007] As a preferred technical solution, the driving unit is a cylinder.

[0008] As a preferred technical solution, the motor is a servo motor.

[0009] As a preferred technical solution, the driven assembly includes a bearing seat, a bearing and a driven ejector column. The bearing seat is fixed on the base, the outer ring of the bearing is fixedly installed on the bearing seat, the driven ejector column is arranged opposite to the active ejector column and one end is fixedly connected to the inner ring of the bearing. The part to be measured is clamped by the active ejector column and the driven ejector column.

[0010] As a preferred technical solution, the top of the support block is V-shaped.

[0011] As a preferred technical solution, the eddy current probe is connected to a translation device so that the eddy current probe moves along the axis direction of the part being measured.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The utility model is applied to the blind-zone-free positioning and rotation drive mechanism of eddy current detection of short-axis parts. It replaces the fixing method of clamping the outer circle of the part with a three-jaw clamp by clamping from two end faces, thereby solving the problem of clamping occupying the eddy current detection space. The outer circle of the part can be fully detected without being divided into two workstations, thereby ensuring the detection efficiency and saving equipment cost and space. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of a prior art method of using a three-jaw clamp to clamp the outer circle of a part;

[0015] Figure 2 This is a structural diagram of the positioning and rotation drive mechanism of the utility model applied to eddy current testing of short-axis parts without blind spots;

[0016] Figure 3 This is a side view of the positioning and rotation drive mechanism of the utility model for eddy current testing of short-shaft parts without blind spots;

[0017] Figure 4 It is a top view of the positioning and rotation drive mechanism of the utility model which is applied to eddy current detection of short-axis parts without blind areas.

[0018] In the figure: 1. Eddy current probe; 2. Base; 3. Support block; 4. Drive unit; 5. Motor; 6. Active ejector column; 7. Bearing seat; 8. Bearing; 9. Driven ejector column; 10. Three-jaw clamp; 11. Part to be measured. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described below in conjunction with specific embodiments:

[0020] like Figure 2 As shown, a positioning and rotation drive mechanism for eddy current testing of short-axis parts without blind spots includes an eddy current probe, a base 2, a driven component, a support block 3 and a driving component. The driven component, the support block 3 and the driving component are sequentially mounted on the base 2. The part to be tested 11 is placed on the support block 3. The eddy current probe is arranged directly above the part to be tested 11. The part to be tested 11 is clamped by the driving component and the driven component and driven to rotate.

[0021] like Figure 2 and Figure 4As shown, the drive assembly includes a drive unit 4, a motor 5, and an active push column 6. The drive unit 4 is in transmission connection with the active push column 6, driving the active push column 6 to translate toward the driven assembly. The motor 5's shaft is coaxially arranged with the active push column 6 and in transmission connection, driving the active push column 6 to rotate. During testing, the drive unit 4 controls the active push column 6 to extend, engage with the driven assembly, and clamp the part 11 under test. The motor 5 then drives the active push column 6 to rotate, driving the part to rotate, facilitating the eddy current probe to fully inspect the part 11 under test.

[0022] The driving unit 4 uses a cylinder, and other components such as a ball screw can also be used as the driving unit 4 to control the extension of the active push column 6.

[0023] The motor 5 is a servo motor 5 , which has high precision and good stability.

[0024] like Figure 2 and Figure 3 As shown, the driven assembly includes a bearing seat 7, a bearing 8, and a driven push pin 9. The bearing seat 7 is fixed to the base 2, and the outer ring of the bearing 8 is fixedly mounted on the bearing seat 7. The driven push pin 9 is arranged opposite the active push pin 6 and one end is fixedly connected to the inner ring of the bearing 8. The part 11 to be measured is clamped by the active push pin 6 and the driven push pin 9. When the active push pin 6 is driven to rotate by the motor 5, the part 11 to be measured rotates accordingly, and the driven push pin 9 also rotates with the part.

[0025] The top of the support block 3 is V-shaped, which helps stabilize the part 11 under test when placed on it. A pneumatic or electric mechanism is installed underneath the support block 3. After the part 11 under test is clamped and before it rotates, the pneumatic or electric mechanism drives the support block 3 to actively lower and break contact with the part 11 under test.

[0026] The eddy current probe is connected to a translation device, which can also be a cylinder or other device. The translation device drives the eddy current probe to move at a constant speed along the axis direction of the measured part 11 to complete the entire detection of the outer circle of the measured part 11.

[0027] This embodiment is only a further explanation of the invention and is not a limitation of the invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed, but as long as they are within the scope of the claims of the invention, they are protected by patent law.

Claims

1. A positioning and rotation drive mechanism for eddy current testing of short-axis parts without blind spots, characterized in that: It includes an eddy current probe, a base, a driven component, a support block and a driving component. The driven component, support block and driving component are installed on the base in sequence. The part to be measured is placed on the support block. The eddy current probe is set directly above the part to be measured. The part to be measured is clamped by the driving component and the driven component and driven to rotate.

2. The positioning and rotation drive mechanism for eddy current testing of short-axis parts without blind spots according to claim 1 is characterized in that: The driving assembly includes a driving unit, a motor and an active push column. The driving unit is in transmission connection with the active push column. The driving unit drives the active push column to translate toward the driven assembly. The shaft of the motor is coaxially arranged with the active push column and is in transmission connection with the active push column. The motor drives the active push column to rotate.

3. The positioning and rotation drive mechanism for eddy current testing of short-axis parts without blind spots according to claim 2, characterized in that: The driving unit is a cylinder.

4. The positioning and rotation drive mechanism for eddy current testing of short-axis parts without blind spots according to claim 2, characterized in that: The motor is a servo motor.

5. The blind-zone-free positioning and rotation drive mechanism for eddy current testing of short-axis parts according to claim 2 is characterized in that: The driven assembly includes a bearing seat, a bearing and a driven ejector column. The bearing seat is fixed on the base, the outer ring of the bearing is fixedly installed on the bearing seat, the driven ejector column is arranged opposite to the active ejector column and one end is fixedly connected to the inner ring of the bearing. The measured part is clamped by the active ejector column and the driven ejector column.

6. The blind-zone-free positioning and rotation drive mechanism for eddy current testing of short-axis parts according to claim 1 is characterized in that: The top of the support block is V-shaped.

7. The blind-zone-free positioning and rotation drive mechanism for eddy current testing of short-axis parts according to claim 1 is characterized in that: The eddy current probe is connected to a translation device so that the eddy current probe moves along the axis direction of the measured part.

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