An OGP star probe horizontal calibration fixture

Abstract

This utility model discloses an OGP star-shaped probe horizontal calibration fixture, including standard blocks and a fixture body. The standard blocks are respectively installed at the front end of the fixture body. Each standard block also includes a reference needle, a mounting base, a mounting bolt, and a positioning groove. The reference needle is located on the front side of the center point of the mounting base, the mounting bolt is located on the rear side of the mounting base, and the positioning groove is located on the surface of the mounting bolt. The fixture body also includes an adjustment platform and a stabilizing base. The adjustment platform, which adjusts the spacing between the standard blocks, is located above the stabilizing base, which prevents the fixture from shifting. The functions of this utility model are: simplifying the operation process, shortening the calibration time, and lowering the operation threshold; reducing the time spent on repeated positioning due to probe replacement, increasing the applicability of the device to complex measurement conditions; improving the stability of the device during calibration, and reducing the calibration difficulty.

Description

Technical Field

[0001] This utility model belongs to the field of calibration fixture technology, and in particular relates to an OGP star probe horizontal calibration fixture. Background Technology

[0002] OGP (Optical Probe Measurement) is an advanced non-contact and multi-sensor system used in quality control and assurance industries. By installing a star-shaped probe at the front end of the sensor, it can be used to detect various complex features and internal holes. The probe can perform multi-part inspection, shortening the inspection cycle. The OGP probe is shared with the three-dimensional star-shaped probe. Since different projects use different probe models, it is necessary to frequently disassemble and install. After disassembly and installation, the probe needs to be leveled and calibrated for accuracy.

[0003] During use, when calibrating the star probe, it is usually necessary to purchase one TP200 sensor suction cup and one M2 five-way probe holder as spare equipment. After calibrating the three probes to be level using the above equipment, they are not disassembled and are stored and used separately. This makes the original equipment expensive, and two sets of probes need to be installed and kept as spares. Therefore, in actual use, one set of equipment is usually used. After disassembling the probes, they need to be reinstalled and leveled.

[0004] The calibration steps are as follows: First, set the OGP running speed to the slowest setting. Then, create a new program and place the probe holder of a single probe upside down on the OGP stage, using the main probe ball head as a reference target. Attach the star-shaped probe to the sensor, and then slowly move the ball head at one end of the probe to be calibrated to the position of the main probe ball head, making the two ball heads coincide in the XY plane. Finally, zero the OGP coordinates.

[0005] Then slowly move the ball head of the other end of the probe to be calibrated to the position of the ball head of the main probe, so that the two ball heads coincide in the XY plane. Then observe the Y coordinate value on the OGP. The Y value at this time is the difference between the two probes in the horizontal direction. Remember that this is the difference we need to calibrate. Through this difference, we can know the rotation angle of the probe.

[0006] Finally, open the OGP dust cover and locate the sensor mounting bracket. This requires two people: one person uses a hex wrench to slightly loosen the sensor's fixing nut (just enough for the sensor to move), while the other person simultaneously supports the sensor with both hands to prevent it from falling. Once the nut is loose and the sensor can move, rotate the sensor to adjust the difference between the two ends. Repeat steps 1 and 2 after rotating the sensor until the difference between the Y-axis on both sides is within 0.01. Repeat these steps until the sphericity of all probes is within 0.003, completing the calibration.

[0007] This method has the following drawbacks: 1. The original method requires a long adjustment and verification period. A single successful calibration of the level and probe takes nearly 50 minutes, and repeated calibrations are often necessary, significantly increasing the actual time and consuming much more of the normal OGP measurement time. Furthermore, the operation is very complex and requires specialized or trained personnel. 2. During calibration, probes of different specifications need to be recalibrated using the same steps, making the already time-consuming calibration work even more laborious. This results in the device consuming even more time for probe replacement during measurement, reducing its applicability to complex measurement conditions. 3. During calibration, the inverted probe holder, which serves as the reference, is susceptible to external contact and vibration, causing displacement of the entire probe holder. Since the current method requires manual adjustment of the fixing nuts to reduce the error to a specified range before calibration can be completed, movement of the reference probe holder increases the calibration error, thus increasing the calibration difficulty.

[0008] Therefore, this paper provides an OGP star probe horizontal calibration fixture. Utility Model Content

[0009] To address the aforementioned technical problems, this utility model discloses an OGP star probe horizontal calibration fixture, which simplifies the operation process, shortens the calibration time, and lowers the operation threshold; reduces the time spent on repeated positioning due to probe replacement, increases the applicability of the device to complex measurement conditions; improves the stability of the device during calibration, and reduces the calibration difficulty.

[0010] To achieve the above technical effects, this utility model provides an OGP star probe horizontal calibration fixture, including standard blocks and a fixture body. The standard blocks are respectively installed at the front end of the fixture body. The standard blocks also include a reference needle, a mounting base, a mounting bolt, and a positioning groove. The reference needle is located in front of the center point of the mounting base, the mounting bolt is located in the rear of the mounting base, and the positioning groove is located on the surface of the mounting bolt. The fixture body also includes an adjustment platform and a stabilizing base. The adjustment platform for adjusting the spacing between the standard blocks is located above the stabilizing base for preventing displacement of the fixture.

[0011] Preferably, the front side of the adjustment platform is provided with mounting holes that match the mounting bolts.

[0012] Preferably, the mounting hole is provided with a limiting block that is slidably connected to the positioning groove.

[0013] Preferably, the adjustment platform is provided with a prompt line.

[0014] Preferably, the indicator line is parallel to the horizontal center line of the mounting hole.

[0015] Preferably, the stable base further includes a base body, a support groove, connecting rod a, connecting rod b, a fixing rod, rubber feet, and magnets. The support grooves are respectively arranged on the left and right sides of the base body. The front end of connecting rod a is slidably installed in the side groove of the support groove. The end of connecting rod a is connected to the front end of connecting rod b via a pivot. The end of connecting rod b is connected to the rubber feet via a pivot. The front end of the fixing rod is connected to the square hole in the middle of connecting rod b via a pivot. Magnets are respectively arranged in the support groove and the lower part of connecting rod b.

[0016] Preferably, the support groove is provided with grooves on both sides to facilitate the removal of the connecting rod b.

[0017] Preferably, the bottom surface of the connecting rod a is provided with a square hole into which a fixing rod can be inserted.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] The device is equipped with a standard block and an adjustment platform. It establishes a fixed reference by using optical coordinate images and the fixture body, which simplifies the operation process, shortens the calibration time, and lowers the operating threshold. At the same time, after one positioning, it can perform calibration operations on probes of different specifications, reducing the time spent on repeated positioning due to probe replacement and increasing the applicability of the device to complex measurement conditions. The stable base reduces the error caused by displacement of the reference device due to external influences during calibration, improves the stability of the device during calibration, and reduces the difficulty of calibration. Attached Figure Description

[0020] Figure 1 This is an isometric view of the present invention;

[0021] Figure 2 This is the left view of this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the standard block in this utility model;

[0023] Figure 4 This is a schematic diagram of the stabilizing support mechanism in this utility model;

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Standard block; 2. Reference needle; 3. Mounting base; 4. Mounting bolt; 5. Positioning groove; 6. Adjustment platform; 7. Stable base; 8. Mounting hole; 9. Limiting block; 10. Indicator line; 11. Base body; 12. Support groove; 13. Link a; 14. Link b; 15. Fixing rod; 16. Rubber foot pad; 17. Magnet. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0027] like Figures 1 to 4 As shown, the existing technology in this embodiment has the following problems: The inventors have found the following defects in the existing technology: 1. The original method requires a long time for adjustment and verification. The calibration level + calibration probe normally takes nearly 50 minutes to succeed on the first try. It usually requires repeated calibration, and the actual time will be even longer, which seriously occupies the normal measurement time of OGP. Moreover, the operation is very complicated and requires professional or trained personnel to operate. 2. When performing calibration, probes of different specifications need to be recalibrated according to the same steps, which makes the already time-consuming calibration work even more time-consuming and laborious. When the device changes probes for measurement, it consumes more time for calibration and probe replacement, which reduces the applicability of the device in dealing with complex measurement conditions. 3. During the calibration process, the probes on the inverted probe holder, which serve as the reference, are easily affected by external contact and vibration during the contact calibration process, causing the probe holder to shift as a whole. Since the existing method requires manually turning the fixing nut and making multiple adjustments to reduce the error to a specified range before calibration can be completed, the movement of the reference probe holder will increase the error during calibration, which will increase the difficulty of calibration.

[0028] Therefore, the inventor provides an OGP star probe horizontal calibration fixture, including a standard block 1 and a fixture body. The standard blocks 1 are respectively installed at the front end of the fixture body. The standard block 1 also includes a reference needle 2, a mounting base 3, a mounting bolt 4, and a positioning groove 5. The reference needle 2 is located in front of the center point of the mounting base 3, the mounting bolt 4 is located in the rear of the mounting base 3, and the positioning groove 5 is located on the surface of the mounting bolt 4. The fixture body also includes an adjustment platform 6 and a stabilizing base 7. The adjustment platform 6, which adjusts the spacing between the standard blocks 1, is located above the stabilizing base 7, which prevents the fixture from shifting.

[0029] Using the above scheme, during calibration, the fixture body is placed on the measuring platform, the measuring instrument is turned on, and image information is detected by the optical sensor. The operator aligns the fixture body with the coordinate axis on the optical coordinate system based on the image signal detected by the sensor on the computer. Then, the stabilizing base 7 is opened to fix the fixture body, and the standard block 1 is fixed in the two empty positions of the adjusting platform 6 through the positioning groove 5 on the mounting bolt 4. The distance between the standard blocks 1 is based on the distance between the two ends of the probe to be calibrated. In this way, a fixed reference is determined by the optical coordinate image and the fixture body. Finally, the two probes to be calibrated are horizontally adjusted with the reference needle 2 at the front end of the standard block 1 as the reference. The sensor fixing bolt is loosened, the sensor is rotated, and the two horizontal probes are aligned with the left and right ends of the reference needle 2. The bolt is then tightened, and the OGP device is controlled to drive the probe to move slowly toward the reference needle 2. After checking the error and making adjustments, the calibration is completed.

[0030] Furthermore, the front side of the adjusting platform 6 is provided with mounting holes 8 that match the mounting bolts 4;

[0031] By inserting the mounting bolt 4 into the mounting hole 8, the standard block 1 can be placed into different mounting holes 8 according to the distance of the probe to be calibrated after the fixture body is fixed. This allows for calibration of probes of different specifications after one positioning, reducing the time of repeated positioning caused by changing probes and increasing the applicability of the device to complex measurement conditions.

[0032] Furthermore, a limiting block 9 is provided inside the mounting hole 8, which is slidably connected to the positioning groove 5;

[0033] When the mounting bolt 4 is slidably inserted into the mounting hole 8 along the positioning groove 5 and the limiting block 9, the mounting base 3 is rotated when it is inserted to the bottom, so that the limiting block 9 slides along the positioning groove 5 to the fixed position, preventing the standard block 1 from sliding out of the mounting hole 8 during calibration. When the standard block 1 needs to be replaced or adjusted, the fixing is released by rotating in the opposite direction, and the standard block 1 can be taken out.

[0034] Furthermore, a prompt line 10 is provided on the adjustment platform 6;

[0035] The indicator line 10 is made of a bright fluorescent coating, which can improve the calibration efficiency when calibrating the optical coordinate axis with the fixture body.

[0036] Furthermore, the indicator line 10 is parallel to the horizontal center line of the mounting hole 8;

[0037] In the process of calibrating the optical coordinate axis with the fixture body, the fixture body is moved to align the reference line with the X-axis of the optical coordinate axis. This completes the setting of the calibration reference for the fixture body. Since the indicator line 10 is parallel to the horizontal center line of the mounting hole 8, after the indicator line 10 is aligned with the coordinate axis of the optical coordinate system, the reference needle 2 at the front end of the standard block 1 installed in the mounting hole 8 is parallel to the horizontal center line of the standard block 1. Therefore, the horizontal line connecting the reference needle 2 is parallel to the indicator line 10, and the reference needle 2 can be used as the reference standard for the calibration probe. By setting an indirect reference system, the operation process is simplified, the calibration time is shortened, and the operation threshold is lowered.

[0038] Furthermore, the stable base 7 also includes a base body 11, a support groove 12, a connecting rod a13, a connecting rod b14, a fixing rod 15, a rubber foot pad 16, and a magnet 17. The support groove 12 is respectively arranged on the left and right sides of the base body 11. The front end of the connecting rod a13 is slidably installed in the side groove of the support groove 12. The end of the connecting rod a13 is connected to the front end of the connecting rod b14. The end of the connecting rod b14 is connected to the rubber foot pad 16. The front end of the fixing rod 15 is connected to the square hole in the middle of the connecting rod b14. The magnet 17 is respectively arranged in the support groove 12 and the lower part of the connecting rod b14.

[0039] When calibrating the fixture body, when the stable base 7 is in the retracted state, the front end of the connecting rod a13 is retracted to the bottom of the slide groove, and the connecting rod a13, connecting rod b14, and fixing rod 15 are closed and fixed in the support groove 12 by the magnet 17, saving the space occupied by the device.

[0040] After calibrating and fixing the fixture body, unfold and fix the stabilizing base 7. Pull the connecting rod a13 to raise the front end of the connecting rod a13 to the top of the slide groove. Pull the connecting rod b14 and the fixing rod 15 outward to unfold the connecting rod a13 and the connecting rod b14. Then fix the connecting rod a13 and the connecting rod b14 with the fixing rod 15 to form a stable triangular support. At this time, the rubber foot pad 16 at the end of the connecting rod b14 provides friction to fix the fixture body to the working plane. This allows the calibrated fixture body to be firmly fixed on the working plane, reducing the error caused by the displacement of the reference device due to external influences during the calibration process, improving the stability of the device during the calibration process, and reducing the calibration difficulty.

[0041] Furthermore, grooves are provided on both sides of the support groove 12 to facilitate the removal of the connecting rod b14;

[0042] The groove facilitates the pulling of the connecting rod when the stable base 7 is being deployed, improving the efficiency of unfolding the stable support structure.

[0043] Furthermore, the bottom surface of the connecting rod a13 is provided with a square hole (not shown in the figure) into which the fixing rod 15 can be inserted.

[0044] The square hole can hold the unfolded fixing rod 159 in place, forming a triangular support to stabilize the entire calibration fixture.

[0045] In summary, this device features a standard block 1 and an adjustment platform 6. By using optical coordinate images and the fixture body to establish a fixed reference, it simplifies the operation process, shortens calibration time, and lowers the operational threshold. Furthermore, after a single positioning, calibration operations can be performed on probes of different specifications, reducing the time spent on repeated positioning due to probe replacement and increasing the device's applicability to complex measurement conditions. The stable base 7 reduces errors caused by displacement of the reference device due to external influences during calibration, improving the device's stability and reducing calibration difficulty.

[0046] The working principle of this utility model:

[0047] During calibration, the fixture body is placed on the measuring platform (not shown in the figure), the measuring instrument is turned on, and image information is detected by the optical sensor (not shown in the figure). The operator displays the image signal detected by the sensor on the computer (not shown in the figure). The indicator line 10 is set with obvious fluorescent paint. The X-axis of the optical coordinate axis is aligned with the fixture body using the indicator line 10. The fixture body is aligned with the X-axis of the optical coordinate system (not shown in the figure). Since the indicator line 10 is parallel to the horizontal center line of the mounting hole 8, after the indicator line 10 is aligned with the coordinate axis of the optical coordinate system, the reference needle 2 at the front end of the standard block 1 installed in the mounting hole 8 is parallel to the horizontal center line of the standard block 1. Therefore, the horizontal line of the reference needle 2 is parallel to the indicator line 10. The reference needle 2 can be used as the reference standard for calibration probe. By setting an indirect reference system, the operation process is simplified, the calibration time is shortened, and the operation threshold is lowered.

[0048] After the fixture body is calibrated and fixed, the stable base 7 is unfolded and fixed. The connecting rod a13 is pulled to raise the front end of the connecting rod a13 to the top of the slide groove. The connecting rod b14 and the fixing rod 15 are pulled outward to unfold the connecting rod a13 and the connecting rod b14. Then, the connecting rod a13 and the connecting rod b14 are fixed through the square hole by the fixing rod 15 to form a stable triangular support. At this time, the rubber foot pad 16 at the end of the connecting rod b14 provides friction to fix the fixture body to the working plane, so that the calibrated fixture body can be firmly fixed on the working plane, reducing the error caused by the displacement of the reference device due to external influences during the calibration process, improving the stability of the device during the calibration process, and reducing the calibration difficulty.

[0049] Afterwards, the mounting bolt 4 is slid into the mounting hole 8 along the positioning groove 5 and the limiting block 9. When it is inserted to the bottom, the mounting base 3 is rotated so that the limiting block 9 slides along the positioning groove 5 to the fixed position to prevent the standard block 1 from sliding out of the mounting hole 8 during calibration. The standard block 1 is placed into different mounting holes 8 according to the distance of the probe to be calibrated. In this way, a fixed reference is determined by the optical coordinate image and the fixture body.

[0050] Finally, adjust the two probes that need to be calibrated horizontally with the reference needle 2 at the front end of the standard block 1 as a reference. Loosen the sensor fixing bolts, rotate the sensor, and visually observe that the two horizontal probes are aligned with the left and right ends of the reference needle 2. Then tighten the bolts and control the OGP device to drive the probes to move slowly toward the reference needle 2. After checking the error on the computer, make adjustments to complete the calibration.

[0051] This concludes the description of the working principle of the device.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0053] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An OGP star-shaped probe horizontal calibration jig, comprising a standard block (1) and a jig body, the standard block (1) being respectively installed at the front end of the jig body, characterized in that: The standard block (1) also includes a reference needle (2), a mounting base (3), a mounting bolt (4), and a positioning groove (5). The reference needle (2) is located on the front side of the center point of the mounting base (3), the mounting bolt (4) is located on the rear side of the mounting base (3), and the positioning groove (5) is located on the surface of the mounting bolt (4). The fixture body also includes an adjustment platform (6) and a stabilizing base (7). The adjustment platform (6) for adjusting the spacing between the standard blocks (1) is located above the stabilizing base (7) for preventing the fixture from shifting.

2. The OGP star probe horizontal calibration jig of claim 1, wherein: The front side of the adjustment platform (6) is provided with mounting holes (8) that match the mounting bolts (4).

3. The OGP star probe horizontal calibration fixture of claim 2, wherein: The mounting hole (8) is provided with a limiting block (9) that is slidably connected to the positioning groove (5).

4. The OGP star probe horizontal calibration fixture of claim 1, wherein: The adjustment platform (6) is provided with a prompt line (10).

5. The OGP star probe horizontal calibration fixture of claim 4, wherein: The indicator line (10) is parallel to the horizontal center line of the mounting hole (8).

6. The OGP star probe horizontal calibration fixture according to claim 1, characterized in that: The stable base (7) also includes a base body (11), a support groove (12), a connecting rod a (13), a connecting rod b (14), a fixing rod (15), a rubber foot pad (16), and a magnet (17). The support groove (12) is respectively set on the left and right sides of the base body (11). The front end of the connecting rod a (13) is slidably installed in the side groove of the support groove (12). The end of the connecting rod a (13) is connected to the front end of the connecting rod b (14) by a pivot. The end of the connecting rod b (14) is connected to the rubber foot pad (16) by a pivot. The front end of the fixing rod (15) is connected to the square hole in the middle of the connecting rod b (14) by a pivot. The magnet (17) is respectively set in the lower part of the support groove (12) and the connecting rod b (14).

7. The OGP star probe horizontal calibration fixture according to claim 6, characterized in that: The support groove (12) has grooves on both sides to facilitate the removal of the connecting rod b (14).

8. The OGP star probe horizontal calibration fixture according to claim 6, characterized in that: The bottom surface of the connecting rod a (13) is provided with a square hole into which the fixing rod (15) can be inserted.

Images